/* ==========================================================================
   Base & Reset
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--md-sys-font-sans);
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  transition: background-color var(--md-sys-motion-duration-medium) ease,
              color var(--md-sys-motion-duration-medium) ease;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* App Shell Layout */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 1rem 5.5rem 1rem;
}

@media (min-width: 600px) {
  .main-content {
    padding: 2rem 1.5rem 3.5rem 1.5rem;
  }
}

@media (min-width: 840px) {
  .main-content {
    padding: 2.5rem 2rem 4rem 2rem;
  }
}

/* Repository detail is a wider, denser work surface. Other pages retain the shell width. */
.main-content:has(.repo-page-shell) {
  max-width: 1440px;
}

/* ==========================================================================
   Material 3 Top App Bar
   ========================================================================== */

.m3-top-app-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 1.25rem;
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid color-mix(in srgb, var(--md-sys-color-outline-variant) 35%, transparent);
  transition: background-color var(--md-sys-motion-duration-short) ease,
              border-color var(--md-sys-motion-duration-short) ease;
}

@media (min-width: 600px) {
  .m3-top-app-bar {
    padding: 0 2rem;
  }
}

.m3-app-bar-start {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.m3-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.02em;
  user-select: none;
}

.m3-brand-logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--md-sys-shape-corner-medium);
  background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, var(--md-sys-color-tertiary) 100%);
  color: var(--md-sys-color-on-primary);
  font-weight: 800;
  font-size: 0.9375rem;
}

.m3-brand-name {
  font-weight: 700;
  letter-spacing: -0.03em;
}

.m3-nav-links {
  display: none;
  align-items: center;
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .m3-nav-links {
    display: flex;
  }
}

.m3-nav-link {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-on-surface-variant);
  transition: all var(--md-sys-motion-duration-short) ease;
}

.m3-nav-link:hover {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
}

.m3-nav-link.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.m3-app-bar-end {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.m3-user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.m3-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  font: var(--md-sys-typescale-label-large);
  font-weight: 600;
  user-select: none;
}

.m3-user-name {
  display: none;
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  font-weight: 500;
}

@media (min-width: 600px) {
  .m3-user-name {
    display: inline-block;
  }
}

/* ==========================================================================
   Page Headers & Breadcrumbs
   ========================================================================== */

.m3-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font: var(--md-sys-typescale-label-medium);
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 1rem;
  transition: color var(--md-sys-motion-duration-short) ease;
}

.m3-breadcrumb:hover {
  color: var(--md-sys-color-primary);
}

.m3-page-header {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
  padding-bottom: 0.5rem;
}

@media (min-width: 600px) {
  .m3-page-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2.25rem;
  }
}

.m3-page-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  line-height: 1.15;
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.035em;
  margin-bottom: 0.5rem;
}

.m3-page-subtitle {
  font: var(--md-sys-typescale-body-large);
  font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.55;
  max-width: 680px;
}

.m3-page-header-actions {
  display: none;
}

@media (min-width: 600px) {
  .m3-page-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
  }
}

.m3-page-header-actions .m3-btn-filled {
  min-height: 48px;
  padding: 0.75rem 1.75rem;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  box-shadow: var(--md-sys-elevation-2);
  transition: transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              background-color var(--md-sys-motion-duration-short) ease,
              box-shadow var(--md-sys-motion-duration-short) ease;
}

.m3-page-header-actions .m3-btn-filled:active {
  transform: scale(0.97);
  box-shadow: var(--md-sys-elevation-1);
}

/* ==========================================================================
   Search & Filter Bar (M3 Expressive Chips & Search)
   ========================================================================== */

.m3-filter-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

@media (min-width: 768px) {
  .m3-filter-section {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.m3-search-bar {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 380px;
}

.m3-search-icon {
  position: absolute;
  left: 1rem;
  color: var(--md-sys-color-on-surface-subtle);
  pointer-events: none;
  display: flex;
  align-items: center;
}

.m3-search-input {
  width: 100%;
  min-height: 44px;
  padding: 0.625rem 1rem 0.625rem 2.625rem;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid color-mix(in srgb, var(--md-sys-color-outline-variant) 35%, transparent);
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-body-medium);
  outline: none;
  transition: border-color var(--md-sys-motion-duration-short) ease,
              background-color var(--md-sys-motion-duration-short) ease,
              box-shadow var(--md-sys-motion-duration-short) ease;
}

.m3-search-input:focus {
  border-color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface-container);
  box-shadow: 0 0 0 1px var(--md-sys-color-primary);
}

.m3-search-clear-btn {
  position: absolute;
  right: 0.75rem;
  background: none;
  border: none;
  color: var(--md-sys-color-on-surface-subtle);
  cursor: pointer;
  padding: 0.25rem;
  display: flex;
  align-items: center;
  border-radius: var(--md-sys-shape-corner-full);
}

.m3-search-clear-btn:hover {
  color: var(--md-sys-color-on-surface);
}

.m3-filter-chips {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
  -webkit-overflow-scrolling: touch;
}

.m3-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4375rem 0.875rem;
  border-radius: var(--md-sys-shape-corner-full);
  border: 1px solid color-mix(in srgb, var(--md-sys-color-outline-variant) 35%, transparent);
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-medium);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: all var(--md-sys-motion-duration-short) ease;
}

.m3-filter-chip:hover {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
}

.m3-filter-chip:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.m3-filter-chip.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: transparent;
  font-weight: 700;
}

/* ==========================================================================
   Buttons (M3 Expressive: Filled, Tonal, Outlined, Text, FAB)
   ========================================================================== */

/* Extended Floating Action Button (FAB) */
.m3-fab-container {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 50;
}

@media (min-width: 600px) {
  .m3-fab-container {
    display: none;
  }
}

.m3-fab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  min-height: 56px;
  min-width: 56px;
  padding: 0 1.25rem;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border: none;
  font: var(--md-sys-typescale-label-large);
  box-shadow: var(--md-sys-elevation-3);
  cursor: pointer;
  transition: transform var(--md-sys-motion-duration-short) ease, box-shadow var(--md-sys-motion-duration-short) ease;
}

.m3-fab:active {
  transform: scale(0.96);
  box-shadow: var(--md-sys-elevation-1);
}

/* ==========================================================================
   Project Grid & Cards (Filled M3 Surface Architecture)
   ========================================================================== */

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.m3-project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 1.5rem;
  border: none;
  transition: transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              background-color var(--md-sys-motion-duration-short) ease,
              box-shadow var(--md-sys-motion-duration-short) ease;
  cursor: pointer;
  text-decoration: none;
  gap: 1.25rem;
}

.m3-project-card:hover {
  background-color: var(--md-sys-color-surface-container-high);
  transform: translateY(-2px);
  box-shadow: var(--md-sys-elevation-1);
}

.m3-project-card:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.m3-project-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.m3-project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.m3-project-card-title-group {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  min-width: 0;
  flex: 1;
}

.m3-project-card-heading {
  min-width: 0;
  flex: 1;
}

.m3-project-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 1.125rem;
  flex-shrink: 0;
}

.m3-project-card-title {
  font: var(--md-sys-typescale-title-large);
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  line-height: 1.3;
  word-break: break-word;
}

.m3-project-card-slug {
  font: var(--md-sys-typescale-code);
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-subtle);
  margin-top: 0.25rem;
  word-break: break-all;
}

.m3-project-card-summary {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

.m3-project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.625rem;
  border-top: none;
  font: var(--md-sys-typescale-label-small);
  color: var(--md-sys-color-on-surface-subtle);
}

.m3-project-card-footer-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.m3-project-card-footer-meta .m3-chip {
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-small);
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border: none;
}

.m3-project-card-date {
  font: var(--md-sys-typescale-label-small);
  color: var(--md-sys-color-on-surface-subtle);
  white-space: nowrap;
}

/* ==========================================================================
   Rich Empty & Loading States (M3 Expressive)
   ========================================================================== */

.m3-empty-state-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 3.5rem 1.5rem;
  max-width: 680px;
  margin: 2rem auto;
}

@media (min-width: 600px) {
  .m3-empty-state-card {
    padding: 4rem 3rem;
  }
}

.m3-empty-state-icon-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-primary);
  margin-bottom: 1.5rem;
}

.m3-empty-state-title {
  font: var(--md-sys-typescale-headline-medium);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 0.5rem;
}

.m3-empty-state-description {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  max-width: 460px;
  margin-bottom: 2rem;
}

.m3-empty-state-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 320px;
}

@media (min-width: 480px) {
  .m3-empty-state-actions {
    flex-direction: row;
    justify-content: center;
    width: auto;
    max-width: none;
  }
}

/* Starter Templates Grid in Empty State */
.m3-starter-templates-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.875rem;
  width: 100%;
  margin-top: 2rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  text-align: left;
}

@media (min-width: 560px) {
  .m3-starter-templates-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.m3-starter-card {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-medium);
  transition: all var(--md-sys-motion-duration-short) ease;
  cursor: pointer;
  text-decoration: none;
}

.m3-starter-card:hover {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-primary);
  transform: translateY(-2px);
}

.m3-starter-card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.375rem;
}

.m3-starter-card-title {
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 0.25rem;
}

.m3-starter-card-desc {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
  line-height: 1.35;
}

/* Skeleton Loading & Shimmer */
/* ==========================================================================
   Badges & Chips (Tonal M3 Expressive)
   ========================================================================== */

/* ==========================================================================
   Forms, Visual Selectors & Inputs
   ========================================================================== */

.m3-form-card {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-extra-large);
  border: 1px solid var(--md-sys-color-outline-subtle);
  padding: 1.75rem;
  max-width: 680px;
  margin: 0 auto;
}

@media (min-width: 600px) {
  .m3-form-card {
    padding: 2.25rem;
  }
}

/* Visual Option Cards Grid for Templates & Visibility */
.m3-visual-options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

@media (min-width: 520px) {
  .m3-visual-options-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.m3-option-card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-low);
  border: 2px solid var(--md-sys-color-outline-subtle);
  cursor: pointer;
  user-select: none;
  transition: all var(--md-sys-motion-duration-short) ease;
  text-align: left;
}

.m3-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.m3-option-card:has(input:focus-visible) {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
  border-color: var(--md-sys-color-primary);
}

.m3-option-card:hover {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-outline-variant);
}

.m3-option-card.selected {
  background-color: var(--md-sys-color-primary-container);
  border-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary-container);
}

.m3-option-card-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.m3-option-card-title {
  font: var(--md-sys-typescale-title-small);
  color: inherit;
  margin-bottom: 0.125rem;
}

.m3-option-card-desc {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
  line-height: 1.35;
}

.m3-option-card.selected .m3-option-card-desc {
  color: var(--md-sys-color-on-primary-container);
  opacity: 0.9;
}

.m3-form-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

/* ==========================================================================
   Project Detail, Tabs & Discussions
   ========================================================================== */

.m3-detail-hero {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 1.75rem;
  margin-bottom: 2rem;
}

@media (min-width: 600px) {
  .m3-detail-hero {
    padding: 2.25rem;
  }
}

.m3-detail-hero-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

@media (min-width: 600px) {
  .m3-detail-hero-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.m3-detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font: var(--md-sys-typescale-code);
  font-size: 0.8125rem;
  color: var(--md-sys-color-on-surface-subtle);
  margin-top: 1rem;
}

.m3-copy-slug-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.5rem;
  border-radius: var(--md-sys-shape-corner-small);
  border: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-code);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short) ease;
}

.m3-copy-slug-btn:hover {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
}

/* Primary Tabs */
.m3-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  margin-bottom: 2rem;
  overflow-x: auto;
}

.m3-tab-item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.25rem;
  border: none;
  background: transparent;
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  position: relative;
  transition: color var(--md-sys-motion-duration-short) ease;
  white-space: nowrap;
}

.m3-tab-item:hover {
  color: var(--md-sys-color-on-surface);
}

.m3-tab-item.active {
  color: var(--md-sys-color-primary);
  font-weight: 700;
}

.m3-tab-item.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--md-sys-color-primary);
  border-radius: var(--md-sys-shape-corner-full) var(--md-sys-shape-corner-full) 0 0;
}

/* ==========================================================================
   Repository / Project Detail — Material 3 Expressive Surfaces
   ========================================================================== */

.repo-page-shell {
  width: 100%;
}

.repo-header {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1.5rem 1.75rem;
  background: var(--md-sys-color-surface-container-low);
  border: none;
  border-radius: var(--md-sys-shape-corner-extra-large);
  margin-bottom: 1.5rem;
}

@media (min-width: 840px) {
  .repo-header {
    padding: 1.75rem 2rem;
    gap: 1.5rem;
  }
}

.repo-header-topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.repo-breadcrumb-title {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 0;
}

.repo-breadcrumb-brand-group {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-medium);
  letter-spacing: 0.02em;
}

.repo-breadcrumb-brand {
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-medium);
  font-weight: 500;
}

.repo-breadcrumb-separator {
  color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.6;
}

.repo-title {
  min-width: 0;
  overflow: hidden;
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-headline-small);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  text-overflow: ellipsis;
}

.repo-visibility-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.2rem 0.75rem;
  border-radius: var(--md-sys-shape-corner-full);
  border: none;
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font: var(--md-sys-typescale-label-medium);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.repo-summary {
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-large);
  line-height: 1.5;
  max-width: 54rem;
}

.repo-header-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.repo-header-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.repo-meta-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.2rem 0.75rem;
  border-radius: var(--md-sys-shape-corner-full);
  border: none;
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-label-small);
  font-weight: 600;
  white-space: nowrap;
}

.repo-slug,
.repo-member-id {
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-code);
  font-size: 0.8125rem;
}

.repo-slug {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.5rem;
  border-radius: var(--md-sys-shape-corner-xs);
  background: var(--md-sys-color-surface-container);
}

.repo-slug code {
  font-family: inherit;
}

.repo-copy-button {
  display: inline-flex;
  align-items: center;
  min-height: 1.75rem;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-full);
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font: var(--md-sys-typescale-label-small);
  font-weight: 500;
  transition: all var(--md-sys-motion-duration-short) ease;
}

.repo-copy-button:hover,
.repo-copy-button:focus-visible {
  border-color: var(--md-sys-color-primary);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-primary);
}

.repo-header-stats {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-medium);
}

.repo-stat-item {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.repo-stat-separator {
  color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.6;
}

/* Tabs */
.repo-tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid color-mix(in srgb, var(--md-sys-color-outline-variant) 45%, transparent);
  margin-bottom: 1.75rem;
  overflow-x: auto;
  overflow-y: clip;
  scrollbar-width: none;
}

.repo-tabs::-webkit-scrollbar {
  display: none;
}

.repo-tabs .m3-tab-item {
  flex: 0 0 auto;
  min-height: 2.75rem;
  padding: 0.625rem 1.125rem;
  border-radius: var(--md-sys-shape-corner-medium) var(--md-sys-shape-corner-medium) 0 0;
  font: var(--md-sys-typescale-title-small);
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  transition: color var(--md-sys-motion-duration-short) ease,
              background-color var(--md-sys-motion-duration-short) ease;
}

.repo-tabs .m3-tab-item:hover {
  color: var(--md-sys-color-on-surface);
  background-color: var(--md-sys-color-surface-container-low);
}

.repo-tabs .m3-tab-item.active {
  color: var(--md-sys-color-primary);
  font-weight: 700;
}

.repo-tabs .m3-tab-item.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0.5rem;
  right: 0.5rem;
  height: 3px;
  background-color: var(--md-sys-color-primary);
  border-radius: var(--md-sys-shape-corner-full);
}

.repo-tabs .m3-tab-item:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: -2px;
}

.repo-tab-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.35rem;
  height: 1.35rem;
  padding: 0 0.375rem;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-small);
  font-weight: 600;
}

.repo-tabs .m3-tab-item.active .repo-tab-count {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.repo-form-error,
.repo-members-error {
  margin-bottom: 1rem;
}

.repo-members-error {
  margin-bottom: 1.25rem;
}

.repo-section {
  min-width: 0;
}

.repo-section-header,
.repo-discussions-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.repo-section-header {
  flex-wrap: wrap;
}

.repo-section-title,
.repo-form-title {
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-headline-small);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.repo-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.repo-filter-bar .m3-filter-chip {
  min-height: 2rem;
  padding: 0.375rem 0.75rem;
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-medium);
}

.repo-action-button {
  flex: 0 0 auto;
}

.repo-compact-form {
  margin: 0 0 1.25rem;
  padding: 1.5rem;
  background: var(--md-sys-color-surface-container-low);
  border: none;
  border-radius: var(--md-sys-shape-corner-extra-large);
}

.repo-compact-form .m3-form-actions {
  margin-top: 1.25rem;
  padding-top: 0.75rem;
}

.repo-topic-badges {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.375rem;
}

.repo-topic-kind,
.repo-topic-status {
  display: inline-flex;
  align-items: center;
  min-height: 1.5rem;
  padding: 0.125rem 0.625rem;
  border-radius: var(--md-sys-shape-corner-full);
  font: var(--md-sys-typescale-label-small);
  font-weight: 600;
  white-space: nowrap;
}

.repo-topic-kind.proposal { color: var(--md-sys-color-on-primary-container); background: var(--md-sys-color-primary-container); border-color: transparent; }
.repo-topic-kind.discussion { background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-on-surface); }
.repo-topic-kind.decision { color: var(--md-sys-color-on-success-container); background: var(--md-sys-color-success-container); border-color: transparent; }
.repo-topic-kind.issue { color: var(--md-sys-color-on-warning-container); background: var(--md-sys-color-warning-container); border-color: transparent; }
.repo-topic-status { background: transparent; }
.repo-topic-status.open { color: var(--md-sys-color-on-success-container); }
.repo-topic-status.resolved { color: var(--md-sys-color-on-success-container); }
.repo-topic-status.closed,
.repo-topic-status.archived { color: var(--md-sys-color-on-surface-variant); }

.repo-section .m3-discussion-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border: none;
  background: transparent;
}

.repo-section .m3-discussion-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border: none;
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-low);
  text-decoration: none;
  transform: none;
  transition: background-color var(--md-sys-motion-duration-short) ease;
}

.repo-section .m3-discussion-item:hover {
  background: var(--md-sys-color-surface-container-high);
  transform: none;
}

.repo-section .m3-discussion-item:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.repo-page-shell .m3-outline-layout { gap: 1rem; }
.repo-page-shell .m3-outline-sidebar,
.repo-page-shell .m3-doc-editor-card {
  border-radius: var(--md-sys-shape-corner-large);
  padding: 1rem;
}

.repo-member-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border: none;
  background: transparent;
}

.repo-member-row {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.875rem;
  min-height: 4rem;
  padding: 0.75rem 1.125rem;
  border: none;
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-low);
  transition: background-color var(--md-sys-motion-duration-short) ease;
}

.repo-member-row:hover {
  background: var(--md-sys-color-surface-container-high);
}

.repo-member-avatar {
  display: inline-grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font: var(--md-sys-typescale-label-medium);
  font-weight: 700;
}

.repo-member-identity { min-width: 0; }
.repo-member-name-line { display: flex; align-items: center; gap: 0.5rem; min-width: 0; }
.repo-member-display-name { overflow: hidden; color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-title-small); font-weight: 600; text-overflow: ellipsis; white-space: nowrap; }
.repo-member-owner { padding: 0.15rem 0.5rem; border-radius: var(--md-sys-shape-corner-full); border: none; background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); font: var(--md-sys-typescale-label-small); font-weight: 600; }
.repo-member-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.625rem; color: var(--md-sys-color-on-surface-subtle); font: var(--md-sys-typescale-body-small); }
.repo-member-username { color: var(--md-sys-color-on-surface-variant); }
.repo-member-technical { color: var(--md-sys-color-on-surface-variant); }
.repo-member-technical summary { cursor: pointer; list-style: none; }
.repo-member-technical summary::-webkit-details-marker { display: none; }
.repo-member-technical-content { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.375rem; }
.repo-member-id { overflow: hidden; max-width: 22rem; text-overflow: ellipsis; white-space: nowrap; }
.repo-copy-button-compact { padding: 0.2rem 0.5rem; }
.repo-member-role { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-medium); font-weight: 500; white-space: nowrap; }

/* Document Browser (Content tab) */
.repo-document-browser {
  padding: 0;
  border: none;
  background: transparent;
}

.repo-document-browser-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.repo-document-browser-description {
  margin-top: 0.25rem;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-medium);
}

.repo-document-table {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border: none;
  background: transparent;
}

.repo-document-table-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 10rem 8.5rem;
  gap: 1rem;
  align-items: center;
  padding: 0.5rem 1.125rem;
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-medium);
  font-weight: 600;
  letter-spacing: 0.02em;
  background: transparent;
  border: none;
}

.repo-document-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 10rem 8.5rem;
  gap: 1rem;
  align-items: center;
  padding: 0.875rem 1.125rem;
  border: none;
  border-radius: var(--md-sys-shape-corner-large);
  background: var(--md-sys-color-surface-container-low);
  text-decoration: none;
  transition: background-color var(--md-sys-motion-duration-short) ease,
              transform var(--md-sys-motion-duration-short) ease;
}

.repo-document-row:hover {
  background: var(--md-sys-color-surface-container-high);
}

.repo-document-row:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.repo-document-row-title {
  overflow: hidden;
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-title-small);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.repo-document-row-updated {
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-small);
}

.repo-document-row-action {
  color: var(--md-sys-color-primary);
  font: var(--md-sys-typescale-label-medium);
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
}

.repo-document-row-arrow {
  display: inline-block;
  transition: transform var(--md-sys-motion-duration-short) ease;
}

.repo-document-row:hover .repo-document-row-arrow {
  transform: translateX(3px);
}

.repo-document-empty {
  padding: 3rem 1.5rem;
  text-align: center;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background: var(--md-sys-color-surface-container-low);
  border: none;
}

.repo-new-document-form {
  margin-top: 1.25rem;
  padding: 1.5rem;
  background: var(--md-sys-color-surface-container-low);
  border: none;
  border-radius: var(--md-sys-shape-corner-extra-large);
}

@media (max-width: 768px) {
  .repo-header {
    padding: 1.25rem;
    gap: 1rem;
  }
  .repo-header-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .repo-document-table-header {
    display: none;
  }
  .repo-document-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.5rem;
    padding: 0.875rem 1rem;
  }
  .repo-document-row-action {
    grid-column: 1 / -1;
    text-align: left;
    margin-top: 0.25rem;
  }
  .repo-member-row {
    grid-template-columns: 2.25rem minmax(0, 1fr);
    gap: 0.75rem;
  }
  .repo-member-role {
    grid-column: 2;
  }
}

/* Discussion List & Item */
.m3-discussion-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.m3-discussion-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  transition: transform var(--md-sys-motion-duration-short) ease,
              background-color var(--md-sys-motion-duration-short) ease,
              border-color var(--md-sys-motion-duration-short) ease;
}

.m3-discussion-item:hover {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-outline-variant);
  transform: translateY(-2px);
}

.m3-discussion-title {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
  margin-bottom: 0.25rem;
}

.m3-discussion-meta {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
}

/* Messages & Conversation Thread */
.m3-thread-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.m3-card-surface {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 1.5rem;
}

@media (min-width: 600px) {
  .m3-card-surface {
    padding: 2rem;
  }
}

.m3-message-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.m3-message-bubble {
  display: flex;
  gap: 1rem;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 1.25rem;
}

.m3-message-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font: var(--md-sys-typescale-label-large);
  font-weight: 700;
  flex-shrink: 0;
  user-select: none;
}

.m3-message-body-wrap {
  flex: 1;
  min-width: 0;
}

.m3-message-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.375rem;
}

.m3-message-author {
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-on-surface);
}

.m3-message-time {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
}

.m3-message-content {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}

.m3-composer-shortcut-hint {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
  display: none;
}

@media (min-width: 600px) {
  .m3-composer-shortcut-hint {
    display: inline-block;
  }
}

/* Banner Error & Success */
.m3-banner-error {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  font: var(--md-sys-typescale-body-medium);
}

.m3-banner-success {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background-color: var(--md-sys-color-success-container);
  color: var(--md-sys-color-on-success-container);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  font: var(--md-sys-typescale-body-medium);
}

/* ==========================================================================
   Outline & Document Editor Components
   ========================================================================== */

.m3-outline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (min-width: 840px) {
  .m3-outline-layout {
    grid-template-columns: 320px 1fr;
  }
}

.m3-outline-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 1.25rem;
}

.m3-outline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.m3-outline-title {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
}

.m3-outline-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: calc(100vh - 280px);
  overflow-y: auto;
}

.m3-outline-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-subtle);
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  text-align: left;
  transition: all var(--md-sys-motion-duration-short) ease;
  width: 100%;
}

.m3-outline-item:hover {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-outline-variant);
}

.m3-outline-item.active {
  background-color: var(--md-sys-color-primary-container);
  border-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary-container);
  font-weight: 600;
}

.m3-outline-item-title {
  font: var(--md-sys-typescale-body-medium);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.m3-outline-empty-card {
  text-align: center;
  padding: 2.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px dashed var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-large);
}

.m3-outline-empty-title {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
}

.m3-outline-empty-desc {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
  margin-bottom: 0.5rem;
}

/* Document Editor Card */
.m3-doc-editor-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 1.5rem;
}

@media (min-width: 600px) {
  .m3-doc-editor-card {
    padding: 2rem;
  }
}

.m3-doc-editor-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.m3-doc-editor-header-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.m3-doc-editor-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  font: var(--md-sys-typescale-code);
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-subtle);
}

.m3-doc-title-input {
  width: 100%;
  font: var(--md-sys-typescale-headline-small);
  background-color: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 0.75rem 1rem;
  color: var(--md-sys-color-on-surface);
  outline: none;
  transition: border-color var(--md-sys-motion-duration-short) ease,
              box-shadow var(--md-sys-motion-duration-short) ease;
}

.m3-doc-title-input:focus {
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 1px var(--md-sys-color-primary);
}

.m3-doc-editor-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.75rem;
}

/* ==========================================================================
   M3 Dialog & Modal Components
   ========================================================================== */

/* ==========================================================================
   Account Menu & Language Affordance
   ========================================================================== */

.m3-account-menu-container {
  position: relative;
  display: inline-block;
}

.m3-account-button {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--md-sys-shape-corner-full);
  padding: 0.25rem 0.5rem 0.25rem 0.25rem;
  cursor: pointer;
  color: var(--md-sys-color-on-surface);
  transition: all var(--md-sys-motion-duration-short) ease;
}

.m3-account-button:hover {
  background-color: var(--md-sys-color-surface-container);
  border-color: var(--md-sys-color-outline-subtle);
}

.m3-account-button:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.m3-user-name-compact {
  display: none;
  font: var(--md-sys-typescale-label-large);
  font-weight: 600;
}

@media (min-width: 640px) {
  .m3-user-name-compact {
    display: inline-block;
  }
}

.m3-account-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  width: 260px;
  background-color: var(--md-sys-color-surface-container-high);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-large);
  box-shadow: var(--md-sys-elevation-2);
  padding: 0.5rem;
  z-index: 500;
  animation: m3-fade-in 100ms ease-out;
  display: flex;
  flex-direction: column;
}

.m3-account-menu-header {
  padding: 0.75rem 0.75rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.m3-menu-user-name {
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
}

.m3-menu-user-id {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
  font-family: var(--md-sys-font-code);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.m3-menu-divider {
  height: 1px;
  background-color: var(--md-sys-color-outline-subtle);
  margin: 0.375rem 0;
}

.m3-account-menu-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: none;
  border: none;
  border-radius: var(--md-sys-shape-corner-medium);
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-label-large);
  text-align: left;
  cursor: pointer;
  transition: background-color var(--md-sys-motion-duration-short) ease;
}

.m3-account-menu-item:hover {
  background-color: var(--md-sys-color-surface-container-highest);
}

.m3-account-menu-item.danger {
  color: var(--md-sys-color-error);
}

.m3-account-menu-item.danger:hover {
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

.m3-lang-btn {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  background: none;
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-full);
  padding: 0.375rem 0.625rem;
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-label-medium);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short) ease;
}

.m3-lang-btn:hover {
  background-color: var(--md-sys-color-surface-container);
  border-color: var(--md-sys-color-primary);
}

.m3-lang-btn:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

/* ==========================================================================
   Home Loading & Simplified Landing Layout (M3 Expressive)
   ========================================================================== */

.m3-home-loading-skeleton {
  width: 100%;
  animation: m3-fade-in var(--vot-motion-fast) var(--vot-easing-standard);
}

/* ==========================================================================
   Material 3 Expressive Landing Page (WHY → HOW → WHAT → FINAL CTA)
   ========================================================================== */
.m3-landing-clean-container {
  display: flex;
  flex-direction: column;
  gap: clamp(3.5rem, 6.5vw, 6rem);
  max-width: 1160px;
  margin: 0 auto;
  padding: clamp(0.75rem, 2vw, 1.5rem) 0 clamp(2.5rem, 5vw, 4.5rem) 0;
  animation: m3-fade-in 200ms ease-out;
}

/* 1. WHY: Hero Problem Statement (Asymmetric M3 Expressive Composition) */
.m3-landing-hero-section {
  width: 100%;
}

.m3-landing-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
  align-items: center;
}

@media (min-width: 960px) {
  .m3-landing-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.25rem;
    min-height: 48vh;
  }
}

.m3-landing-hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.m3-hero-badge-container {
  margin-bottom: 1.25rem;
}

.m3-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-primary);
  font: var(--md-sys-typescale-label-medium);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.m3-hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-primary);
}

.m3-landing-hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  line-height: 1.12;
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.035em;
  margin-bottom: 1.5rem;
  word-break: break-word;
}

.m3-landing-hero-highlight {
  display: inline-block;
  color: var(--md-sys-color-primary);
  position: relative;
}

.m3-landing-hero-subtitle {
  font: var(--md-sys-typescale-body-large);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.65;
  margin-bottom: 2rem;
  max-width: 620px;
}

.m3-landing-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.m3-hero-cta-btn {
  min-height: 52px;
  padding: 0.875rem 2rem;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  box-shadow: var(--md-sys-elevation-2);
  transition: transform var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard),
              background-color var(--md-sys-motion-duration-short) ease,
              box-shadow var(--md-sys-motion-duration-short) ease;
}

.m3-hero-cta-btn:active {
  transform: scale(0.97);
  box-shadow: var(--md-sys-elevation-1);
}

.m3-hero-secondary-btn {
  min-height: 48px;
  padding: 0.75rem 1.375rem;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 0.9375rem;
  font-weight: 600;
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface);
  border: none;
  text-decoration: none;
}

.m3-hero-secondary-btn:hover {
  background-color: var(--md-sys-color-surface-container-high);
}

/* Hero Expressive Visual */
.m3-landing-hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.m3-hero-canvas {
  position: relative;
  width: 100%;
  max-width: 440px;
  padding: 1.5rem;
  border-radius: var(--md-sys-shape-expressive-hero);
  background: var(--md-sys-color-surface-container-low);
  box-shadow: var(--md-sys-elevation-1);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  animation: m3-hero-float 350ms ease-out;
}

@keyframes m3-hero-float {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.m3-hero-doc-surface {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--md-sys-elevation-1);
}

.m3-hero-doc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid color-mix(in srgb, var(--md-sys-color-outline-variant) 30%, transparent);
}

.m3-hero-doc-window-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.m3-doc-dot {
  width: 9px;
  height: 9px;
  border-radius: var(--md-sys-shape-corner-full);
}

.m3-doc-dot.red { background-color: var(--md-sys-color-error); opacity: 0.8; }
.m3-doc-dot.yellow { background-color: var(--md-sys-color-warning); opacity: 0.8; }
.m3-doc-dot.green { background-color: var(--md-sys-color-success); opacity: 0.8; }

.m3-hero-doc-pill {
  width: 48px;
  height: 8px;
  border-radius: 4px;
  background-color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.35;
}

.m3-hero-doc-tag {
  width: 28px;
  height: 8px;
  border-radius: 4px;
  background-color: var(--md-sys-color-primary-container);
  opacity: 0.8;
}

.m3-hero-doc-content {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.m3-hero-block {
  padding: 0.75rem;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-low);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.m3-hero-block.evolving-block {
  background-color: var(--md-sys-color-surface-container-high);
  position: relative;
}

.m3-hero-block-tag-bar {
  height: 6px;
  border-radius: 3px;
  background-color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.35;
}

.m3-hero-block-tag-bar.accent {
  background-color: var(--md-sys-color-primary);
  opacity: 0.7;
}

.m3-hero-block-tag-bar.w-1-3 { width: 33%; }
.m3-hero-block-tag-bar.w-1-2 { width: 50%; }

.m3-hero-block-tag-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.m3-hero-pill-badge {
  width: 18px;
  height: 6px;
  border-radius: 3px;
  background-color: var(--md-sys-color-primary-container);
  opacity: 0.85;
}

.m3-hero-block-lines {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.m3-hero-line {
  height: 6px;
  border-radius: 3px;
  background-color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.25;
}

.m3-hero-line.w-full { width: 100%; }
.m3-hero-line.w-5-6 { width: 83%; }
.m3-hero-line.w-3-4 { width: 75%; }
.m3-hero-line.w-2-3 { width: 66%; }
.m3-hero-line.w-4-5 { width: 80%; }

.m3-hero-line.accent-tint {
  background-color: var(--md-sys-color-primary);
  opacity: 0.5;
}

.m3-hero-lineage-surface {
  padding: 0.875rem 1.125rem;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container);
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.m3-hero-lineage-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.m3-lineage-icon {
  font-size: 0.875rem;
  color: var(--md-sys-color-primary);
}

.m3-lineage-label-bar {
  width: 64px;
  height: 6px;
  border-radius: 3px;
  background-color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.35;
}

.m3-hero-lineage-nodes {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.m3-lineage-node {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.m3-node-marker {
  width: 8px;
  height: 8px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.5;
}

.m3-node-marker.active {
  background-color: var(--md-sys-color-primary);
  opacity: 1;
}

.m3-node-pill {
  width: 32px;
  height: 6px;
  border-radius: 3px;
  background-color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.35;
}

.m3-node-pill.active {
  background-color: var(--md-sys-color-primary);
  opacity: 0.7;
}

.m3-lineage-connector {
  flex: 1;
  height: 2px;
  background-color: color-mix(in srgb, var(--md-sys-color-outline-variant) 40%, transparent);
}

/* 2. HOW: Principle (Expressive Staggered Surfaces) */
.m3-landing-how-section {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.m3-landing-how-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 720px;
}

.m3-landing-how-title {
  font: var(--md-sys-typescale-headline-medium);
  font-size: clamp(1.625rem, 3vw, 2.125rem);
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.025em;
}

.m3-landing-how-desc {
  font: var(--md-sys-typescale-body-medium);
  font-size: 1.0625rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

.m3-landing-how-stages {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 840px) {
  .m3-landing-how-stages {
    flex-direction: row;
    align-items: stretch;
    gap: 1.25rem;
  }
}

.m3-how-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.75rem 1.5rem;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background-color: var(--md-sys-color-surface-container-low);
  gap: 1.25rem;
}

.m3-how-stage.stage-write {
  border-radius: var(--md-sys-shape-expressive-forward);
  background-color: var(--md-sys-color-surface-container-low);
}

.m3-how-stage.stage-change {
  border-radius: var(--md-sys-shape-expressive-reverse);
  background-color: var(--md-sys-color-surface-container);
}

.m3-how-stage.stage-preserve {
  border-radius: var(--md-sys-shape-expressive-stacked);
  background-color: var(--md-sys-color-surface-container-high);
}

.m3-how-stage-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.m3-how-stage-index {
  font-family: var(--md-sys-font-mono);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--md-sys-color-primary);
}

.m3-how-stage-glyph {
  font-size: 1.25rem;
  color: var(--md-sys-color-primary);
  opacity: 0.8;
}

.m3-how-stage-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 0;
}

.m3-stage-mini-doc {
  width: 100%;
  max-width: 180px;
  height: 80px;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  box-shadow: var(--md-sys-elevation-1);
}

.m3-stage-mini-heading {
  width: 40%;
  height: 8px;
  border-radius: 4px;
  background-color: var(--md-sys-color-primary);
  opacity: 0.7;
}

.m3-stage-mini-body {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.m3-stage-mini-line {
  height: 5px;
  border-radius: 3px;
  background-color: var(--md-sys-color-on-surface-subtle);
  opacity: 0.25;
}

.m3-stage-mini-line.accent {
  background-color: var(--md-sys-color-primary);
  opacity: 0.6;
}

.m3-stage-mini-line.success {
  background-color: var(--md-sys-color-success);
  opacity: 0.6;
}

.m3-stage-mini-block.moved {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-family: var(--md-sys-font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  width: fit-content;
}

.m3-stage-mini-doc.stack {
  position: relative;
  background: transparent;
  box-shadow: none;
}

.m3-stage-stack-card {
  position: absolute;
  inset: 0;
  border-radius: var(--md-sys-shape-corner-medium);
  box-shadow: var(--md-sys-elevation-1);
}

.m3-stage-stack-card.back {
  background-color: var(--md-sys-color-surface-container);
  transform: translate(6px, 6px);
  opacity: 0.6;
}

.m3-stage-stack-card.front {
  background-color: var(--md-sys-color-surface);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: center;
}

.m3-how-stage-content {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.m3-how-stage-title {
  font: var(--md-sys-typescale-title-large);
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
}

.m3-how-stage-desc {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
}

.m3-how-stage-connector {
  display: none;
}

@media (min-width: 840px) {
  .m3-how-stage-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-sys-color-on-surface-subtle);
    opacity: 0.4;
    padding-top: 1rem;
    flex-shrink: 0;
  }
}

/* 3. WHAT: Capabilities (Bento Editorial Rhythm) */
.m3-landing-what-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.m3-landing-what-header {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  max-width: 680px;
}

.m3-landing-what-title {
  font: var(--md-sys-typescale-headline-medium);
  font-size: clamp(1.625rem, 3vw, 2.125rem);
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.025em;
}

.m3-landing-bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 680px) {
  .m3-landing-bento-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .m3-bento-card.bento-wide {
    grid-column: span 2;
  }

  .m3-bento-card.bento-compact {
    grid-column: span 1;
  }
}

.m3-bento-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.75rem 1.5rem;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background-color: var(--md-sys-color-surface-container-low);
}

.m3-bento-icon-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-primary);
  font-size: 1.25rem;
  font-weight: 700;
}

.m3-bento-icon-wrapper.primary {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.m3-bento-icon-wrapper.info {
  background-color: var(--md-sys-color-info-container);
  color: var(--md-sys-color-on-info-container);
}

.m3-bento-icon-wrapper.accent {
  background-color: var(--md-sys-color-accent-container);
  color: var(--md-sys-color-on-accent-container);
}

.m3-bento-icon-wrapper.tertiary {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.m3-bento-content {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.m3-bento-title {
  font: var(--md-sys-typescale-title-large);
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
}

.m3-bento-desc {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
}

.m3-landing-learn-cta-row {
  display: flex;
  align-items: center;
  margin-top: 0.5rem;
}

.m3-landing-learn-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-label-large);
  text-decoration: none;
  border: none;
  transition: all var(--md-sys-motion-duration-short) ease;
}

.m3-landing-learn-btn:hover {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-primary);
}

/* 4. FINAL CTA: Expressive Hero Surface */
.m3-landing-final-cta-section {
  margin-top: 1rem;
}

.m3-final-cta-surface {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.75rem;
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-expressive-hero);
  padding: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 3rem);
}

@media (min-width: 768px) {
  .m3-final-cta-surface {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.m3-final-cta-copy {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 600px;
}

.m3-final-cta-title {
  font: var(--md-sys-typescale-headline-small);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--md-sys-color-on-surface);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.m3-final-cta-subtitle {
  font: var(--md-sys-typescale-body-large);
  font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

.m3-final-cta-action {
  flex-shrink: 0;
}

.m3-final-cta-btn {
  min-height: 52px;
  padding: 0.875rem 2rem;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 1rem;
  font-weight: 700;
  box-shadow: var(--md-sys-elevation-2);
}

/* Dashboard Populated Section */
.m3-dashboard-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.m3-dashboard-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.m3-dashboard-section-title {
  font: var(--md-sys-typescale-title-large);
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.01em;
}

/* ==========================================================================
   Catalog / Learn View Styles
   ========================================================================== */

.m3-learn-container {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem 0 3.5rem 0;
  animation: m3-fade-in 200ms ease-out;
}

.m3-learn-header {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.m3-learn-title {
  font-size: 2rem;
  line-height: 1.2;
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.03em;
}

@media (min-width: 600px) {
  .m3-learn-title {
    font-size: 2.5rem;
  }
}

.m3-learn-subtitle {
  font: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
  max-width: 720px;
}

.m3-learn-demo-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.m3-learn-section-intro {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.m3-learn-section-title {
  font: var(--md-sys-typescale-headline-small);
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
}

.m3-learn-section-desc {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
}

.m3-learn-demo-wrapper {
  display: flex;
  justify-content: center;
  width: 100%;
}

/* Semantic Change Visual Demo */
.m3-semantic-demo-card {
  width: 100%;
  max-width: 540px;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 1.5rem;
  box-shadow: var(--md-sys-elevation-2);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  overflow: hidden;
}

.m3-semantic-demo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--md-sys-color-outline-subtle);
}

.m3-semantic-demo-file {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--md-sys-font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
}

.m3-semantic-file-icon {
  font-size: 1rem;
}

.m3-semantic-file-name {
  letter-spacing: -0.01em;
}

.m3-semantic-status-pill {
  font-family: var(--md-sys-font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface-variant);
}

.m3-semantic-demo-body {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.m3-semantic-node {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 0.75rem 0.875rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: border-color var(--md-sys-motion-duration-short) ease,
              background-color var(--md-sys-motion-duration-short) ease;
}

.m3-semantic-node.refined {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 1px var(--md-sys-color-primary);
}

.m3-semantic-node-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.m3-semantic-node-title {
  font: var(--md-sys-typescale-title-small);
  color: var(--md-sys-color-on-surface);
  font-weight: 600;
}

.m3-semantic-pill-static {
  font: var(--md-sys-typescale-label-small);
  padding: 0.1875rem 0.5rem;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface-subtle);
}

.m3-semantic-pill-active {
  font: var(--md-sys-typescale-label-small);
  padding: 0.1875rem 0.5rem;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font-weight: 700;
}

.m3-semantic-pill-neutral {
  font: var(--md-sys-typescale-label-small);
  padding: 0.1875rem 0.5rem;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface-variant);
}

.m3-semantic-evolution-detail {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-family: var(--md-sys-font-mono);
  font-size: 0.75rem;
  padding: 0.375rem 0.5rem;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface-container-lowest);
}

.m3-semantic-diff-line {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.m3-semantic-diff-line.old {
  color: var(--md-sys-color-error);
  text-decoration: line-through;
  opacity: 0.75;
}

.m3-semantic-diff-line.new {
  color: var(--md-sys-color-success);
  font-weight: 600;
}

.m3-diff-symbol {
  font-weight: 700;
}

.m3-semantic-demo-footer {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--md-sys-color-outline-subtle);
}

.m3-semantic-guarantee {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font: var(--md-sys-typescale-label-small);
  color: var(--md-sys-color-success);
  font-weight: 600;
}

.m3-semantic-caption {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-subtle);
  line-height: 1.4;
}

/* Knowledge Type Cards Section */
.m3-landing-types-section {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.m3-landing-section-header {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  max-width: 680px;
}

.m3-landing-section-title {
  font: var(--md-sys-typescale-headline-medium);
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.02em;
}

.m3-landing-section-desc {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
}

.m3-landing-types-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .m3-landing-types-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.m3-landing-type-card {
  display: flex;
  flex-direction: column;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  padding: 1.75rem 1.5rem;
  transition: transform var(--md-sys-motion-duration-short) ease,
              background-color var(--md-sys-motion-duration-short) ease,
              border-color var(--md-sys-motion-duration-short) ease,
              box-shadow var(--md-sys-motion-duration-short) ease;
}

.m3-landing-type-card:hover {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-outline-variant);
  transform: translateY(-2px);
  box-shadow: var(--md-sys-elevation-2);
}

.m3-landing-type-card.shape-handbook {
  border-radius: var(--md-sys-shape-corner-extra-large);
}

.m3-landing-type-card.shape-spec {
  border-radius: 32px 12px 32px 12px;
}

.m3-landing-type-card.shape-research {
  border-radius: 12px 32px 12px 32px;
}

.m3-type-card-icon-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-highest);
  margin-bottom: 1.25rem;
}

.m3-type-icon {
  font-size: 1.375rem;
}

.m3-type-card-header {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  margin-bottom: 0.75rem;
}

.m3-type-card-title {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
}

.m3-type-card-subtitle {
  font: var(--md-sys-typescale-label-medium);
  color: var(--md-sys-color-primary);
  font-weight: 600;
}

.m3-type-card-desc {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
  flex: 1;
}

/* How VOT Works Section */
.m3-how-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  scroll-margin-top: 80px;
}

.m3-how-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .m3-how-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

.m3-how-card {
  display: flex;
  flex-direction: column;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 1.5rem;
  transition: transform var(--md-sys-motion-duration-short) ease,
              background-color var(--md-sys-motion-duration-short) ease;
}

.m3-how-card:hover {
  background-color: var(--md-sys-color-surface-container);
  transform: translateY(-2px);
}

.m3-how-card.highlight {
  border-color: var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container);
}

.m3-how-step-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.m3-how-step-num {
  font-family: var(--md-sys-font-mono);
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
  width: 28px;
  height: 28px;
  border-radius: var(--md-sys-shape-corner-small);
  display: flex;
  align-items: center;
  justify-content: center;
}

.m3-how-step-title {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
}

.m3-how-chip {
  display: inline-flex;
  align-items: center;
  font-family: var(--md-sys-font-mono);
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-variant);
  background-color: var(--md-sys-color-surface-container-highest);
  padding: 0.25rem 0.625rem;
  border-radius: var(--md-sys-shape-corner-full);
  margin-bottom: 0.875rem;
  width: fit-content;
}

.m3-how-chip.highlight {
  color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface-container-high);
}

.m3-how-step-desc {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.5;
}

/* Landing Bottom CTA */
.m3-landing-bottom-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 2.25rem 1.75rem;
  text-align: center;
  margin-top: 1rem;
}

@media (min-width: 640px) {
  .m3-landing-bottom-cta {
    flex-direction: row;
    text-align: left;
    padding: 2.5rem 2.5rem;
  }
}

.m3-bottom-cta-copy {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.m3-bottom-cta-title {
  font: var(--md-sys-typescale-headline-small);
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
}

.m3-bottom-cta-subtitle {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
}

/* Auth Required Card */
.m3-auth-required-card {
  margin: 3rem auto;
}

/* Clean Empty State */
.m3-empty-state-clean {
  padding: 3rem 1.5rem;
  max-width: 520px;
  margin: 2.5rem auto;
}

/* Neutral Home Session Skeleton */
.m3-home-session-skeleton {
  width: 100%;
  position: relative;
  overflow: hidden;
  padding: 1rem 0 3rem 0;
  animation: m3-fade-in var(--vot-motion-fast) var(--vot-easing-standard);
}

.m3-hero-skeleton-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 960px) {
  .m3-hero-skeleton-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
    padding-top: 2rem;
  }
}

.m3-hero-skeleton-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.m3-skeleton-badge-pill {
  width: 180px;
  height: 28px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-high);
  margin-bottom: 1.5rem;
}

.m3-skeleton-hero-title {
  width: 90%;
  height: 42px;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface-container-highest);
  margin-bottom: 0.75rem;
}

.m3-skeleton-hero-title.short {
  width: 60%;
  margin-bottom: 1.5rem;
}

.m3-skeleton-hero-desc {
  width: 80%;
  height: 18px;
  border-radius: var(--md-sys-shape-corner-extra-small);
  background-color: var(--md-sys-color-surface-container-high);
  margin-bottom: 0.5rem;
}

.m3-skeleton-hero-desc.short {
  width: 50%;
  margin-bottom: 2rem;
}

.m3-skeleton-hero-cta-group {
  display: flex;
  gap: 1rem;
}

.m3-skeleton-btn {
  width: 140px;
  height: 48px;
  border-radius: var(--md-sys-shape-corner-full);
  background-color: var(--md-sys-color-surface-container-highest);
}

.m3-skeleton-btn.small {
  width: 110px;
}

.m3-hero-skeleton-card {
  width: 100%;
  max-width: 480px;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Neutral New Project Skeleton */
.m3-new-project-skeleton {
  width: 100%;
  position: relative;
  overflow: hidden;
  max-width: 680px;
  margin: 0 auto;
  padding: 1rem 0;
  animation: m3-fade-in var(--vot-motion-fast) var(--vot-easing-standard);
}

.m3-skeleton-breadcrumb {
  width: 120px;
  height: 16px;
  border-radius: var(--md-sys-shape-corner-extra-small);
  background-color: var(--md-sys-color-surface-container-high);
  margin-bottom: 1.5rem;
}

.m3-skeleton-page-title {
  width: 260px;
  height: 32px;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface-container-highest);
  margin-bottom: 0.5rem;
}

.m3-skeleton-page-subtitle {
  width: 380px;
  height: 16px;
  border-radius: var(--md-sys-shape-corner-extra-small);
  background-color: var(--md-sys-color-surface-container-high);
  margin-bottom: 2rem;
}

.m3-skeleton-form-card {
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.m3-skeleton-input-box {
  width: 100%;
  height: 48px;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface-container-highest);
  margin-bottom: 1rem;
}

/* Session Error Card & States */
.m3-session-error-card {
  margin: 3rem auto;
}

.m3-empty-state-icon-container.error {
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

/* Prefers-reduced-motion accessibility support */
@media (prefers-reduced-motion: reduce) {
  .m3-home-loading-skeleton,
  .m3-home-session-skeleton,
  .m3-new-project-skeleton,
  .m3-landing-container,
  .m3-landing-type-card,
  .m3-how-card,
  .m3-semantic-node,
  .m3-project-card,
  .m3-hero-canvas,
  .m3-how-stage,
  .m3-bento-card,
  .m3-hero-cta-btn {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}

/* ==========================================================================
   Material Expressive Document Workspace (Calm Writing Surface)
   ========================================================================== */

.workspace-main-content { max-width: none; width: 100%; min-height: 100vh; padding: 0; }
.workspace-shell { --workspace-panel: var(--md-sys-color-surface-container-low); --workspace-panel-high: var(--md-sys-color-surface-container); display: flex; flex-direction: column; min-height: 100vh; background: var(--md-sys-color-background); color: var(--md-sys-color-on-surface); }
.workspace-topbar { display: flex; align-items: center; gap: 1.25rem; min-height: 56px; padding: 0.5rem 1.25rem; background: var(--md-sys-color-surface); transition: background var(--md-sys-motion-duration-short) ease; }
.workspace-back,
.workspace-context,
.workspace-topbar-actions,
.workspace-statusbar,
.workspace-pane-header,
.workspace-document-row,
.workspace-quick-open-header { display: flex; align-items: center; }

.workspace-back { flex: 0 0 auto; gap: 0.5rem; padding: 0.4rem 0.75rem; border: 0; border-radius: var(--md-sys-shape-corner-full); background: transparent; color: var(--md-sys-color-on-surface-variant); cursor: pointer; font: var(--md-sys-typescale-label-medium); transition: background var(--md-sys-motion-duration-short) ease, color var(--md-sys-motion-duration-short) ease; }
.workspace-back:hover { background: var(--md-sys-color-surface-container); color: var(--md-sys-color-on-surface); }
.workspace-back svg,
.workspace-icon-button svg,
.workspace-rail-button svg,
.workspace-add-button svg { width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

.workspace-context { min-width: 0; gap: 0.5rem; overflow: hidden; white-space: nowrap; }
.workspace-context-project,
.workspace-context-document { overflow: hidden; text-overflow: ellipsis; }
.workspace-context-project { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-medium); font-weight: 500; opacity: 0.85; }
.workspace-context-document { color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-title-small); font-weight: 600; }
.workspace-context-separator { color: var(--md-sys-color-outline-variant); margin: 0 0.125rem; opacity: 0.6; }

.workspace-topbar-actions { display: flex; align-items: center; gap: 0.375rem; margin-left: auto; }
.workspace-save-status { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.25rem 0.625rem; border: 0; border-radius: var(--md-sys-shape-corner-full); font: var(--md-sys-typescale-label-small); transition: all var(--md-sys-motion-duration-short) ease; background: transparent; color: var(--md-sys-color-on-surface-variant); }
.workspace-save-status.unsaved { color: var(--md-sys-color-on-surface-variant); background: var(--md-sys-color-surface-container); }
.workspace-save-status.saving { color: var(--md-sys-color-primary); background: var(--md-sys-color-surface-container); }
.workspace-save-status.saved { color: var(--md-sys-color-on-surface-variant); background: var(--md-sys-color-surface-container); }
.workspace-save-status.saved.quiet { opacity: 0; pointer-events: none; transition: opacity 0.5s ease; }
.workspace-save-status.error { color: var(--md-sys-color-on-error-container); background: var(--md-sys-color-error-container); cursor: pointer; }
.workspace-save-status.readonly { color: var(--md-sys-color-on-surface-variant); background: var(--md-sys-color-surface-container); opacity: 0.85; }
.workspace-status-dot { width: 6px; height: 6px; border-radius: 50%; display: inline-block; }
.workspace-status-dot.dirty-dot { background: var(--md-sys-color-tertiary, #b07000); }
.workspace-status-dot.saving-dot { background: var(--md-sys-color-primary); animation: workspace-pulse 1.2s infinite ease-in-out; }
@keyframes workspace-pulse { 0%, 100% { opacity: 0.4; } 50% { opacity: 1; } }

.workspace-tooltip-wrapper { position: relative; display: inline-flex; align-items: center; justify-content: center; }
.workspace-tooltip { position: absolute; left: calc(100% + 8px); top: 50%; transform: translateY(-50%) scale(0.95); opacity: 0; pointer-events: none; padding: 0.3rem 0.6rem; border-radius: 6px; background: var(--md-sys-color-inverse-surface, #2d3135); color: var(--md-sys-color-inverse-on-surface, #eff1f5); font: var(--md-sys-typescale-label-small); font-size: 0.725rem; white-space: nowrap; z-index: 100; transition: opacity 0.15s ease, transform 0.15s ease; box-shadow: var(--md-sys-elevation-2); }
.workspace-tooltip-wrapper:hover .workspace-tooltip,
.workspace-tooltip-wrapper:focus-within .workspace-tooltip { opacity: 1; transform: translateY(-50%) scale(1); transition-delay: 0.3s; }
.workspace-tooltip.topbar-tooltip { left: 50%; top: calc(100% + 6px); transform: translateX(-50%) scale(0.95); }
.workspace-tooltip-wrapper:hover .workspace-tooltip.topbar-tooltip,
.workspace-tooltip-wrapper:focus-within .workspace-tooltip.topbar-tooltip { opacity: 1; transform: translateX(-50%) scale(1); transition-delay: 0.3s; }

.workspace-toolbar-button { padding: 0.4rem 0.95rem; border: 0; border-radius: var(--md-sys-shape-corner-full); background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); cursor: pointer; font: var(--md-sys-typescale-label-medium); font-weight: 600; transition: background var(--md-sys-motion-duration-short) ease, color var(--md-sys-motion-duration-short) ease; }
.workspace-toolbar-button:hover:not(:disabled) { background: var(--md-sys-color-primary-hover, color-mix(in srgb, var(--md-sys-color-primary) 90%, var(--md-sys-color-on-primary))); }
.workspace-toolbar-button:disabled { cursor: default; opacity: 0.38; background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-on-surface-variant); }
.workspace-icon-button,
.workspace-rail-button,
.workspace-add-button { display: inline-grid; place-items: center; border: 0; border-radius: var(--md-sys-shape-corner-full); background: transparent; color: var(--md-sys-color-on-surface-variant); cursor: pointer; transition: background var(--md-sys-motion-duration-short) ease, color var(--md-sys-motion-duration-short) ease; }
.workspace-icon-button { width: 2.25rem; height: 2.25rem; }
.workspace-icon-button:hover,
.workspace-rail-button:hover,
.workspace-add-button:hover { background: var(--workspace-panel-high); color: var(--md-sys-color-on-surface); }
.workspace-icon-button.active { background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-primary); }
.workspace-icon-button:focus-visible,
.workspace-rail-button:focus-visible,
.workspace-add-button:focus-visible,
.workspace-document-item:focus-visible,
.workspace-outline-item:focus-visible,
.workspace-tab-button:focus-visible,
.workspace-toolbar-button:focus-visible,
.workspace-back:focus-visible { outline: 2px solid var(--md-sys-color-primary); outline-offset: 2px; }

.workspace-layout { position: relative; display: grid; grid-template-columns: 48px minmax(0, 1fr); flex: 1; min-height: 0; }
.workspace-layout.outline-open { grid-template-columns: 48px var(--sidebar-width, 280px) minmax(0, 1fr); }
.workspace-layout.inspector-open { grid-template-columns: 48px minmax(0, 1fr) var(--inspector-width, 290px); }
.workspace-layout.outline-open.inspector-open { grid-template-columns: 48px var(--sidebar-width, 280px) minmax(0, 1fr) var(--inspector-width, 290px); }
.workspace-layout.is-resizing { user-select: none; }

.workspace-resize-handle { position: absolute; top: 0; bottom: 0; width: 8px; cursor: col-resize; z-index: 15; touch-action: none; }
.workspace-resize-handle.left-handle { left: calc(48px + var(--sidebar-width, 280px) - 4px); }
.workspace-resize-handle.right-handle { right: calc(var(--inspector-width, 290px) - 4px); }
.workspace-resize-handle::after { content: ''; position: absolute; top: 0; bottom: 0; left: 3px; width: 2px; background: transparent; transition: background 0.15s ease; }
.workspace-resize-handle:hover::after,
.workspace-resize-handle.resizing::after { background: var(--md-sys-color-primary); }

.workspace-activity-rail { display: flex; flex-direction: column; align-items: center; gap: 0.375rem; padding-top: 0.75rem; background: var(--md-sys-color-surface); }
.workspace-rail-button { width: 2.25rem; height: 2.25rem; border-radius: var(--md-sys-shape-corner-medium); }
.workspace-rail-button.active { color: var(--md-sys-color-on-primary-container); background: var(--md-sys-color-primary-container); }

.workspace-outline-pane,
.workspace-inspector-pane { min-width: 0; background: var(--workspace-panel); overflow: auto; }
.workspace-outline-pane { border-radius: 0 20px 20px 0; padding: 0.5rem 0.5rem 1rem; }
.workspace-inspector-pane { border-radius: 20px 0 0 20px; padding: 0.5rem 0.5rem 1rem; }

.workspace-pane-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 0.5rem; padding: 0.5rem 0.625rem 0.75rem; }
.workspace-pane-header-title { display: flex; flex-direction: column; min-width: 0; }
.workspace-pane-header h2,
.workspace-pane-heading { font: var(--md-sys-typescale-title-small); font-weight: 600; margin: 0; }
.workspace-pane-kicker { display: block; overflow: hidden; margin-bottom: 0.25rem; color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); text-overflow: ellipsis; white-space: nowrap; }

.workspace-segmented-nav { display: inline-flex; gap: 0.2rem; padding: 0.2rem; border-radius: var(--md-sys-shape-corner-full); background: var(--md-sys-color-surface-container); margin-top: 0.25rem; }
.workspace-tab-button { padding: 0.3rem 0.75rem; border: 0; border-radius: var(--md-sys-shape-corner-full); background: transparent; color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-medium); cursor: pointer; transition: all 0.15s ease; }
.workspace-tab-button:hover { color: var(--md-sys-color-on-surface); }
.workspace-tab-button.active { background: var(--md-sys-color-surface); color: var(--md-sys-color-on-surface); font-weight: 600; box-shadow: var(--md-sys-elevation-1); }
.workspace-add-button { width: 2rem; height: 2rem; }

.workspace-document-list { display: flex; flex-direction: column; gap: 0.25rem; padding: 0.25rem; }
.workspace-document-item { display: flex; flex-direction: column; align-items: flex-start; gap: 0.2rem; width: 100%; padding: 0.6rem 0.75rem; border: 0; border-radius: 12px; background: transparent; color: var(--md-sys-color-on-surface); cursor: pointer; text-align: left; transition: background var(--md-sys-motion-duration-short) ease, color var(--md-sys-motion-duration-short) ease; }
.workspace-document-item:hover { background: var(--workspace-panel-high); }
.workspace-document-item.selected { background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-on-surface); font-weight: 600; }
.workspace-document-item-header { display: flex; align-items: center; justify-content: space-between; width: 100%; gap: 0.5rem; }
.workspace-document-item-title { overflow: hidden; width: 100%; font: var(--md-sys-typescale-body-medium); font-weight: inherit; text-overflow: ellipsis; white-space: nowrap; }
.workspace-document-item-date { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); opacity: 0.75; }
.workspace-document-dirty-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--md-sys-color-tertiary, #b07000); flex-shrink: 0; }

.workspace-outline-list,
.workspace-outline-tree { display: flex; flex-direction: column; gap: 0.2rem; }
.workspace-outline-list { padding: 0.25rem; }
.workspace-outline-item { display: flex; align-items: center; gap: 0.5rem; width: 100%; padding: 0.45rem 0.65rem; border: 0; border-radius: 10px; background: transparent; color: var(--md-sys-color-on-surface); cursor: pointer; text-align: left; font: var(--md-sys-typescale-body-small); transition: background 0.12s ease, opacity 0.12s ease; }
.workspace-outline-item:hover { background: var(--workspace-panel-high); }
.workspace-outline-item.selected,
.workspace-outline-item.active { background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); font-weight: 600; }
.workspace-outline-item.stale { opacity: 0.5; cursor: wait; }
.workspace-outline-item.stale:hover { background: transparent; }
.workspace-outline-item.level-1 { padding-left: 0.6rem; font-weight: 600; }
.workspace-outline-item.level-2 { padding-left: 1.1rem; }
.workspace-outline-item.level-3 { padding-left: 1.6rem; }
.workspace-outline-item.level-4 { padding-left: 2.1rem; }
.workspace-outline-item.level-5 { padding-left: 2.4rem; }
.workspace-outline-item.level-6 { padding-left: 2.7rem; }
.workspace-outline-badge { display: inline-flex; align-items: center; justify-content: center; min-width: 1.35rem; height: 1.2rem; padding: 0 0.25rem; border-radius: 6px; background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-primary); font-family: var(--md-sys-font-code); font-size: 0.6875rem; font-weight: 700; line-height: 1; flex-shrink: 0; }
.workspace-outline-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workspace-outline-line { color: var(--md-sys-color-on-surface-variant); font-family: var(--md-sys-font-code); font-size: 0.6875rem; opacity: 0.65; flex-shrink: 0; }
.workspace-outline-empty { padding: 2rem 0.75rem; color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-body-small); text-align: center; }

.workspace-new-document { display: flex; flex-direction: column; gap: 0.5rem; padding: 0.625rem; margin-bottom: 0.5rem; background: var(--workspace-panel-high); border-radius: 14px; }
.workspace-compact-input { width: 100%; min-width: 0; padding: 0.5rem 0.75rem; border: 1px solid var(--md-sys-color-outline-variant); border-radius: 10px; background: var(--md-sys-color-surface); font-size: 0.8125rem; color: var(--md-sys-color-on-surface); outline: none; transition: border-color 0.15s ease; box-sizing: border-box; }
.workspace-compact-input:focus { border-color: var(--md-sys-color-primary); }
.workspace-new-document-actions { display: flex; align-items: center; gap: 0.5rem; }
.workspace-compact-submit { padding: 0.35rem 0.75rem; border: 0; border-radius: var(--md-sys-shape-corner-full); background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); cursor: pointer; font: var(--md-sys-typescale-label-small); font-weight: 600; transition: background var(--md-sys-motion-duration-short) ease; }
.workspace-compact-submit:hover:not(:disabled) { background: var(--md-sys-color-primary-hover, color-mix(in srgb, var(--md-sys-color-primary) 90%, var(--md-sys-color-on-primary))); }
.workspace-compact-cancel { padding: 0.35rem 0.75rem; border: 0; border-radius: var(--md-sys-shape-corner-full); background: transparent; color: var(--md-sys-color-on-surface-variant); cursor: pointer; font: var(--md-sys-typescale-label-small); transition: background var(--md-sys-motion-duration-short) ease; }
.workspace-compact-cancel:hover { background: var(--md-sys-color-surface-container); color: var(--md-sys-color-on-surface); }

.workspace-editor-pane { flex: 1; min-width: 0; overflow: auto; background: var(--md-sys-color-surface); }
.workspace-editor { display: flex; flex-direction: column; width: min(100%, 860px); min-height: calc(100vh - 120px); margin: 0 auto; padding: clamp(2rem, 5vh, 4rem) clamp(1.25rem, 3.5vw, 2.5rem) 4rem; }
.workspace-document-title-input,
.workspace-document-title { width: 100%; margin: 0 0 1.5rem; padding: 0; border: 0; background: transparent; color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-headline-large); font-size: 2.125rem; font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; outline: none; transition: box-shadow 0.15s ease; }
.workspace-document-title-input::placeholder { color: var(--md-sys-color-on-surface-variant); opacity: 0.5; }
.workspace-document-title-input:focus-visible { outline: none; box-shadow: 0 2px 0 0 var(--md-sys-color-primary); }
.workspace-document-content { flex: 1; width: 100%; min-height: 55vh; overflow: hidden; border: 0; background: transparent; }
.workspace-document-content .cm-editor { min-height: 55vh; height: 100%; border: 0; background: transparent; }
.workspace-document-content .cm-editor.cm-focused,
.workspace-document-content .cm-editor:focus-visible { outline: 2px solid color-mix(in srgb, var(--md-sys-color-primary) 45%, transparent); outline-offset: 4px; border-radius: 8px; }

.codemirror-demo { width: min(100%, 960px); margin: 0 auto; padding: clamp(1.5rem, 5vw, 4rem); }
.codemirror-demo-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 1.5rem; margin-bottom: 1.5rem; }
.codemirror-demo-kicker { margin: 0 0 0.35rem; color: var(--md-sys-color-primary); font: var(--md-sys-typescale-label-large); letter-spacing: 0.04em; text-transform: uppercase; }
.codemirror-demo h1 { margin: 0; color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-headline-medium); }
.codemirror-demo-header p:not(.codemirror-demo-kicker),
.codemirror-demo-note { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-body-medium); }
.codemirror-demo-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.625rem; }
.codemirror-demo-editor { min-height: 60vh; overflow: hidden; border: 0; border-radius: var(--md-sys-shape-corner-large); background: var(--md-sys-color-surface-container-low); box-shadow: var(--md-sys-elevation-1); }
.codemirror-demo-editor .cm-editor { min-height: 60vh; }
.codemirror-demo-editor .cm-editor.cm-focused,
.codemirror-demo-editor .cm-editor:focus-visible { outline: 2px solid color-mix(in srgb, var(--md-sys-color-primary) 45%, transparent); outline-offset: 4px; border-radius: 8px; }
.codemirror-demo-note { margin: 0.75rem 0 0; }
@media (max-width: 720px) {
  .codemirror-demo-header { align-items: flex-start; flex-direction: column; }
  .codemirror-demo-actions { justify-content: flex-start; }
}

.workspace-inline-error,
.workspace-inline-note,
.workspace-inline-success { margin: 0 0 1.25rem; padding: 0.625rem 0.875rem; border-radius: 12px; font: var(--md-sys-typescale-body-small); }
.workspace-inline-error { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; background: var(--md-sys-color-error-container); color: var(--md-sys-color-on-error-container); }
.workspace-inline-note { background: var(--md-sys-color-surface-container-high); color: var(--md-sys-color-on-surface-variant); }
.workspace-inline-success { background: var(--md-sys-color-success-container); color: var(--md-sys-color-on-success-container); }
.workspace-centered-state { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.75rem; min-height: 50vh; padding: 2rem; color: var(--md-sys-color-on-surface-variant); text-align: center; }
.workspace-centered-state h1 { color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-headline-small); }
.workspace-centered-state p { max-width: 34rem; }

.workspace-inspector-section { padding: 0.875rem 0.75rem; }
.workspace-inspector-section h2 { margin-bottom: 0.75rem; font: var(--md-sys-typescale-title-small); font-weight: 600; }
.workspace-inspector-section dl { display: grid; gap: 0.5rem; }
.workspace-inspector-section dt { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); }
.workspace-inspector-section dd { overflow-wrap: anywhere; font: var(--md-sys-typescale-body-small); }
.workspace-technical-value { color: var(--md-sys-color-on-surface-variant); font-family: var(--md-sys-font-code) !important; }

.workspace-statusbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 28px; padding: 0.35rem 1.25rem 0.5rem; background: transparent; color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); opacity: 0.75; transition: opacity var(--md-sys-motion-duration-short) ease; }
.workspace-statusbar:hover { opacity: 1; }
.workspace-status-meta { display: inline-flex; align-items: center; gap: 0.5rem; min-width: 0; }
.workspace-status-divider { opacity: 0.4; }
.workspace-status-shortcuts { display: inline-flex; align-items: center; gap: 0.5rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workspace-status-cmd-hint { display: inline-flex; align-items: center; gap: 0.35rem; border: 0; border-radius: 6px; background: transparent; color: var(--md-sys-color-on-surface-variant); cursor: pointer; font: inherit; padding: 0.1rem 0.4rem; transition: background 0.15s ease; }
.workspace-status-cmd-hint:hover { background: var(--md-sys-color-surface-container); color: var(--md-sys-color-on-surface); }
.workspace-status-cmd-hint span { font-family: var(--md-sys-font-code); font-size: 0.75rem; font-weight: 600; }
.workspace-status-cmd-hint small { opacity: 0.8; }

.workspace-palette-backdrop { position: fixed; inset: 0; z-index: 100; display: flex; align-items: flex-start; justify-content: center; padding-top: 12vh; background: color-mix(in srgb, var(--md-sys-color-scrim) 38%, transparent); }
.workspace-quick-open { width: min(92vw, 560px); overflow: hidden; border: 0; border-radius: 20px; background: var(--md-sys-color-surface-container-high); box-shadow: var(--md-sys-elevation-3); }
.workspace-quick-open-header { display: flex; align-items: center; justify-content: space-between; padding: 0.875rem 1.25rem; font: var(--md-sys-typescale-label-large); }
.workspace-quick-open-header kbd { padding: 0.15rem 0.4rem; border: 0; border-radius: 6px; background: var(--md-sys-color-surface-container); color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); }
.workspace-quick-open-input { width: 100%; padding: 0.85rem 1.25rem; border: 0; border-bottom: 1px solid var(--md-sys-color-outline-variant); outline: 0; background: transparent; font: var(--md-sys-typescale-body-large); color: var(--md-sys-color-on-surface); box-sizing: border-box; }
.workspace-quick-open-results { max-height: 52vh; overflow: auto; padding: 0.5rem; }
.workspace-quick-open-item { display: flex; align-items: center; justify-content: space-between; gap: 1rem; width: 100%; padding: 0.65rem 0.85rem; border: 0; border-radius: 12px; background: transparent; cursor: pointer; text-align: left; transition: background 0.12s ease; }
.workspace-quick-open-item:hover,
.workspace-quick-open-item.selected { background: var(--md-sys-color-surface-container-highest); color: var(--md-sys-color-on-surface); }
.workspace-quick-open-item small { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); }
.workspace-quick-open-item-main { display: flex; align-items: center; gap: 0.5rem; }
.workspace-active-badge { padding: 0.1rem 0.35rem; border-radius: 4px; background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); font-size: 0.6875rem; font-weight: 600; }

.workspace-command-palette { width: min(92vw, 560px); }
.workspace-command-item { display: flex; align-items: center; justify-content: space-between; gap: 1rem; width: 100%; padding: 0.6rem 0.85rem; border: 0; border-radius: 12px; background: transparent; cursor: pointer; text-align: left; }
.workspace-command-item:disabled { opacity: 0.4; cursor: not-allowed; }
.workspace-command-title { font: var(--md-sys-typescale-body-medium); color: var(--md-sys-color-on-surface); }
.workspace-command-shortcut { padding: 0.15rem 0.45rem; border-radius: 6px; background: var(--md-sys-color-surface-container); color: var(--md-sys-color-on-surface-variant); font-family: var(--md-sys-font-code); font-size: 0.75rem; }

.workspace-search-state { padding: 1rem 0.75rem; color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-body-small); }
.workspace-search-result { align-items: flex-start; }
.workspace-search-result > span { display: flex; flex-direction: column; gap: 0.25rem; min-width: 0; }
.workspace-search-result strong { font: var(--md-sys-typescale-body-medium); }
.workspace-search-result small { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.workspace-semantic-status { color: var(--md-sys-color-on-surface-variant); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

@media (min-width: 840px) and (max-width: 1199px) {
  .workspace-layout { grid-template-columns: 48px minmax(0, 1fr); }
  .workspace-layout.outline-open { grid-template-columns: 48px var(--sidebar-width, 280px) minmax(0, 1fr); }
  .workspace-layout.inspector-open { grid-template-columns: 48px minmax(0, 1fr); }
  .workspace-layout.outline-open.inspector-open { grid-template-columns: 48px var(--sidebar-width, 280px) minmax(0, 1fr); }
  .workspace-inspector-pane { position: absolute; top: 0; bottom: 0; right: 0; z-index: 25; width: min(86vw, 300px); box-shadow: var(--md-sys-elevation-2); border-radius: 20px 0 0 20px; background: var(--workspace-panel); }
  .workspace-status-shortcuts { display: none; }
  .workspace-resize-handle.right-handle { display: none; }
}

@media (max-width: 839px) {
  .workspace-layout,
  .workspace-layout.outline-open,
  .workspace-layout.inspector-open,
  .workspace-layout.outline-open.inspector-open { grid-template-columns: 48px minmax(0, 1fr); }
  .workspace-outline-pane { position: absolute; top: 0; bottom: 0; left: 48px; z-index: 25; width: min(86vw, 300px); box-shadow: var(--md-sys-elevation-2); border-radius: 0 20px 20px 0; background: var(--workspace-panel); }
  .workspace-inspector-pane { position: absolute; top: 0; bottom: 0; right: 0; z-index: 25; width: min(86vw, 300px); box-shadow: var(--md-sys-elevation-2); border-radius: 20px 0 0 20px; background: var(--workspace-panel); }
  .workspace-context-project { display: none; }
  .workspace-status-shortcuts { display: none; }
  .workspace-resize-handle { display: none; }
}

@media (max-width: 560px) {
  .workspace-topbar { gap: 0.5rem; padding-inline: 0.5rem; }
  .workspace-back span { display: none; }
  .workspace-save-status { display: none; }
  .workspace-toolbar-button { padding-inline: 0.65rem; }
  .workspace-editor { padding: 1.5rem 1rem 3rem; }
  .workspace-document-title-input,
  .workspace-document-title { font-size: 1.625rem; }
}

.focus-mode .workspace-activity-rail { display: none; }
.focus-mode .workspace-layout { grid-template-columns: minmax(0, 1fr); }
.focus-mode .workspace-editor { width: min(100%, 860px); }

@media (prefers-reduced-motion: reduce) {
  .workspace-shell *,
  .workspace-shell *::before,
  .workspace-shell *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}