/* ==========================================================================
   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 var(--md-sys-color-outline-variant);
  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: 1rem;
  margin-bottom: 1.75rem;
}

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

.m3-page-title {
  font: var(--md-sys-typescale-headline-large);
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.03em;
  margin-bottom: 0.375rem;
}

.m3-page-subtitle {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  max-width: 650px;
}

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

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

/* ==========================================================================
   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);
  border: 1px solid var(--md-sys-color-outline-subtle);
  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-high);
  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-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-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.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-color: var(--md-sys-color-primary);
  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);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 1.5rem;
  border: 1px solid var(--md-sys-color-outline-subtle);
  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,
              border-color var(--md-sys-motion-duration-short) ease;
  cursor: pointer;
  text-decoration: none;
}

.m3-project-card:hover {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-outline-variant);
  transform: translateY(-3px);
  box-shadow: var(--md-sys-elevation-2);
}

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

.m3-project-card-title-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.m3-project-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-primary);
  flex-shrink: 0;
}

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

.m3-project-card-slug {
  font: var(--md-sys-typescale-code);
  font-size: 0.75rem;
  color: var(--md-sys-color-on-surface-subtle);
  margin-top: 0.125rem;
}

.m3-project-card-summary {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 1.5rem;
  line-height: 1.45;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.m3-project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.875rem;
  border-top: 1px solid var(--md-sys-color-outline-variant);
  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;
  gap: 0.5rem;
}

/* ==========================================================================
   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 shell: compact technical hierarchy and neutral surfaces. */
.repo-page-shell {
  width: 100%;
}

.repo-header {
  background: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-small);
  margin-bottom: 1rem;
  overflow: hidden;
}

.repo-header-topline,
.repo-header-body,
.repo-header-stats {
  padding: 0.75rem 1rem;
}

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

.repo-breadcrumb-title,
.repo-header-tags,
.repo-header-stats,
.repo-name-line,
.repo-topic-badges {
  display: flex;
  align-items: center;
}

.repo-breadcrumb-title {
  min-width: 0;
  gap: 0.5rem;
}

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

.repo-breadcrumb-separator {
  color: var(--md-sys-color-outline);
}

.repo-title {
  min-width: 0;
  overflow: hidden;
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-title-large);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.repo-visibility-badge,
.repo-meta-badge,
.repo-topic-kind,
.repo-topic-status,
.repo-member-owner {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-xs);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-label-small);
  white-space: nowrap;
}

.repo-visibility-badge,
.repo-meta-badge,
.repo-topic-kind,
.repo-topic-status {
  min-height: 1.5rem;
  padding: 0.125rem 0.5rem;
}

.repo-visibility-badge {
  color: var(--md-sys-color-on-primary-container);
  background: var(--md-sys-color-primary-container);
  border-color: transparent;
}

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

.repo-summary {
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-body-medium);
}

.repo-header-tags {
  flex-shrink: 0;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.repo-slug,
.repo-member-id {
  color: var(--md-sys-color-on-surface-subtle);
  font: var(--md-sys-typescale-code);
  font-size: 0.75rem;
}

.repo-copy-button {
  min-height: 1.75rem;
  padding: 0.125rem 0.5rem;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-xs);
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font: var(--md-sys-typescale-label-small);
}

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

.repo-header-stats {
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 1px solid var(--md-sys-color-outline-subtle);
  color: var(--md-sys-color-on-surface-variant);
  font: var(--md-sys-typescale-body-small);
}

.repo-header-stats strong {
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
}

.repo-header-stats time {
  font-family: var(--md-sys-font-mono);
}

.repo-tabs {
  gap: 0;
  margin-bottom: 1.25rem;
  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: 2.25rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--md-sys-shape-corner-xs) var(--md-sys-shape-corner-xs) 0 0;
  font: var(--md-sys-typescale-label-large);
}

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

.repo-tabs .m3-tab-item.active::after {
  bottom: 0;
  height: 2px;
  border-radius: 0;
}

.repo-tab-count {
  color: var(--md-sys-color-on-surface-subtle);
  font: var(--md-sys-typescale-label-small);
}

.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: 1rem;
}

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

.repo-section-title,
.repo-form-title {
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-title-large);
}

.repo-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.repo-filter-bar .m3-filter-chip {
  min-height: 2rem;
  padding: 0.375rem 0.625rem;
  border-radius: var(--md-sys-shape-corner-xs);
  font: var(--md-sys-typescale-label-medium);
}

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

.repo-compact-form {
  margin: 0 0 1rem;
  padding: 1rem;
  border-radius: var(--md-sys-shape-corner-small);
}

.repo-compact-form .m3-form-actions {
  margin-top: 1rem;
  padding-top: 0.75rem;
}

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

.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); }
.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 {
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-small);
}

.repo-section .m3-discussion-item {
  border-width: 0 0 1px;
  border-radius: 0;
  padding: 0.75rem 1rem;
  background: var(--md-sys-color-surface-container-low);
  transform: none;
}

.repo-section .m3-discussion-item:last-child { border-bottom: 0; }
.repo-section .m3-discussion-item:hover { transform: none; }

.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-small);
  padding: 1rem;
}

.repo-member-list {
  overflow: hidden;
  border: 1px solid var(--md-sys-color-outline-subtle);
  border-radius: var(--md-sys-shape-corner-small);
}

.repo-member-row {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  min-height: 4rem;
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--md-sys-color-outline-subtle);
  background: var(--md-sys-color-surface-container-low);
}

.repo-member-row:last-child { border-bottom: 0; }
.repo-member-row:hover { background: var(--md-sys-color-surface-container); }

.repo-member-avatar {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: var(--md-sys-shape-corner-xs);
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  font: var(--md-sys-typescale-label-medium);
}

.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); text-overflow: ellipsis; white-space: nowrap; }
.repo-member-owner { padding: 0.125rem 0.375rem; border-color: transparent; background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); }
.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: 0.25rem 0.5rem; }
.repo-member-role { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-medium); white-space: nowrap; }

@media (max-width: 640px) {
  .repo-header-body { display: block; }
  .repo-header-tags { margin-top: 0.5rem; }
  .repo-member-row { grid-template-columns: 2rem minmax(0, 1fr); }
  .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-content-textarea {
  width: 100%;
  min-height: 420px;
  font-family: var(--md-sys-font-sans);
  font-size: 0.9375rem;
  line-height: 1.6;
  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: 1rem 1.25rem;
  color: var(--md-sys-color-on-surface);
  outline: none;
  resize: vertical;
  tab-size: 4;
  white-space: pre-wrap;
  transition: border-color var(--md-sys-motion-duration-short) ease,
              box-shadow var(--md-sys-motion-duration-short) ease;
}

.m3-doc-content-textarea: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);
}

/* Simplified Editorial Landing Page (Typography-first, zero card clutter) */
.m3-landing-clean-container {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
  max-width: 920px;
  margin: 0 auto;
  padding: 1rem 0 3rem 0;
  animation: m3-fade-in 200ms ease-out;
}

@media (min-width: 768px) {
  .m3-landing-clean-container {
    gap: 4.5rem;
    padding: 2rem 0 4rem 0;
  }
}

@media (min-width: 1024px) {
  .m3-landing-clean-container {
    gap: 5.5rem;
  }
}

/* 1. WHY: Hero Problem Statement (Plain Editorial, No Cards) */
.m3-landing-why-hero {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  max-width: 820px;
  padding-top: 0.5rem;
}

@media (min-width: 840px) {
  .m3-landing-why-hero {
    padding-top: 1.5rem;
    min-height: 46vh;
    justify-content: center;
  }
}

.m3-landing-why-title {
  font-size: 2.125rem;
  line-height: 1.2;
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
}

@media (min-width: 600px) {
  .m3-landing-why-title {
    font-size: 2.75rem;
    line-height: 1.16;
    margin-bottom: 1.5rem;
  }
}

@media (min-width: 960px) {
  .m3-landing-why-title {
    font-size: 3.375rem;
    line-height: 1.14;
  }
}

.m3-landing-why-title-accent {
  background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, var(--md-sys-color-tertiary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.m3-landing-why-subtitle {
  font: var(--md-sys-typescale-body-large);
  font-size: 1.0625rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.65;
  margin-bottom: 2rem;
  max-width: 660px;
}

@media (min-width: 600px) {
  .m3-landing-why-subtitle {
    font-size: 1.125rem;
  }
}

.m3-landing-why-cta-group {
  display: flex;
  align-items: center;
  width: 100%;
}

.m3-landing-btn-primary {
  min-height: 48px;
  padding: 0.75rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

/* 2. HOW: Principle (Editorial 3-Step Flow, No Cards) */
.m3-landing-how-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.m3-landing-how-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 680px;
}

.m3-landing-eyebrow {
  font: var(--md-sys-typescale-label-medium);
  color: var(--md-sys-color-primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.m3-landing-how-title {
  font: var(--md-sys-typescale-headline-medium);
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.02em;
}

@media (min-width: 600px) {
  .m3-landing-how-title {
    font-size: 1.875rem;
  }
}

.m3-landing-how-desc {
  font: var(--md-sys-typescale-body-medium);
  font-size: 1rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

.m3-landing-concepts-flow {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .m3-landing-concepts-flow {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1.25rem;
  }
}

.m3-concept-item {
  flex: 1;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: none;
  border: none;
  padding: 0;
}

@media (min-width: 768px) {
  .m3-concept-item {
    flex-direction: column;
    gap: 0.5rem;
  }
}

.m3-concept-index {
  font-family: var(--md-sys-font-mono);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--md-sys-color-primary);
  line-height: 1.2;
}

.m3-concept-content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

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

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

.m3-concept-arrow {
  display: none;
}

@media (min-width: 768px) {
  .m3-concept-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-sys-color-outline-variant);
    padding-top: 1.5rem;
    flex-shrink: 0;
    opacity: 0.7;
  }
}

/* 3. WHAT: Capabilities (Lightweight Grid, Zero Cards) */
.m3-landing-what-section {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

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

.m3-landing-what-title {
  font: var(--md-sys-typescale-headline-medium);
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  letter-spacing: -0.02em;
}

@media (min-width: 600px) {
  .m3-landing-what-title {
    font-size: 1.875rem;
  }
}

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

@media (min-width: 600px) {
  .m3-landing-capabilities-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 960px) {
  .m3-landing-capabilities-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

.m3-capability-item {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  background: none;
  border: none;
  padding: 0;
}

.m3-capability-heading-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.m3-capability-glyph {
  color: var(--md-sys-color-primary);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1;
}

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

.m3-capability-desc {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.45;
  padding-left: 1.625rem;
}

.m3-landing-learn-cta-row {
  margin-top: 0.75rem;
}

.m3-landing-learn-link {
  display: inline-flex;
  align-items: center;
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-primary);
  text-decoration: none;
  transition: opacity var(--md-sys-motion-duration-short) ease;
}

.m3-landing-learn-link:hover {
  text-decoration: underline;
  opacity: 0.85;
}

/* 4. FINAL CTA (Single expressive card surface on the Landing page) */
.m3-landing-final-cta-section {
  margin-top: 0.5rem;
}

.m3-final-cta-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  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;
}

@media (min-width: 768px) {
  .m3-final-cta-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 2.5rem 2.25rem;
  }
}

.m3-final-cta-copy {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  max-width: 560px;
}

.m3-final-cta-title {
  font: var(--md-sys-typescale-headline-small);
  font-size: 1.5rem;
  color: var(--md-sys-color-on-surface);
  font-weight: 800;
  letter-spacing: -0.02em;
}

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

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

/* 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 {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}

/* ==========================================================================
   Professional document workspace
   ========================================================================== */

.workspace-main-content {
  max-width: none;
  width: 100%;
  min-height: 100vh;
  padding: 0;
}

.workspace-shell {
  --workspace-border: var(--md-sys-color-outline-subtle);
  --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: 1rem;
  min-height: 46px;
  padding: 0.375rem 0.75rem;
  border-bottom: 1px solid var(--workspace-border);
  background: var(--md-sys-color-surface);
}

.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: 0.375rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  font: var(--md-sys-typescale-label-medium);
}

.workspace-back:hover { color: var(--md-sys-color-primary); }
.workspace-back svg,
.workspace-icon-button svg,
.workspace-rail-button svg,
.workspace-add-button svg { width: 1.125rem; height: 1.125rem; 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); }
.workspace-context-document { font: var(--md-sys-typescale-title-small); }
.workspace-context-separator { color: var(--md-sys-color-outline); }

.workspace-topbar-actions { gap: 0.25rem; margin-left: auto; }
.workspace-save-status { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-medium); }
.workspace-save-status.dirty { color: var(--md-sys-color-primary); }
.workspace-save-status.readonly { color: var(--md-sys-color-on-surface-variant); }
.workspace-toolbar-button { padding: 0.3rem 0.55rem; border: 1px solid var(--workspace-border); border-radius: var(--md-sys-shape-corner-extra-small); background: transparent; cursor: pointer; font: var(--md-sys-typescale-label-medium); }
.workspace-toolbar-button:hover:not(:disabled) { border-color: var(--md-sys-color-primary); color: var(--md-sys-color-primary); }
.workspace-toolbar-button:disabled { cursor: default; opacity: 0.48; }
.workspace-icon-button,
.workspace-rail-button,
.workspace-add-button { display: inline-grid; place-items: center; border: 0; border-radius: var(--md-sys-shape-corner-extra-small); background: transparent; color: var(--md-sys-color-on-surface-variant); cursor: pointer; }
.workspace-icon-button { width: 2rem; height: 2rem; }
.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:focus-visible,
.workspace-rail-button:focus-visible,
.workspace-add-button:focus-visible,
.workspace-document-item:focus-visible,
.workspace-toolbar-button:focus-visible { outline: 2px solid var(--md-sys-color-primary); outline-offset: 2px; }

.workspace-layout {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  flex: 1;
  min-height: 0;
}
.workspace-layout.outline-open { grid-template-columns: 44px 260px minmax(0, 1fr); }
.workspace-layout.inspector-open { grid-template-columns: 44px minmax(0, 1fr) 300px; }
.workspace-layout.outline-open.inspector-open { grid-template-columns: 44px 260px minmax(0, 1fr) 300px; }

.workspace-activity-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding-top: 0.5rem;
  border-right: 1px solid var(--workspace-border);
  background: var(--md-sys-color-surface-container-lowest);
}

.workspace-rail-button { width: 2rem; height: 2rem; }
.workspace-rail-button.active { color: var(--md-sys-color-primary); background: var(--md-sys-color-primary-container); }
.workspace-outline-pane,
.workspace-inspector-pane { min-width: 0; background: var(--workspace-panel); }
.workspace-outline-pane { overflow: auto; border-right: 1px solid var(--workspace-border); }
.workspace-inspector-pane { display: none; overflow: auto; border-left: 1px solid var(--workspace-border); }
.workspace-pane-header { justify-content: space-between; gap: 0.5rem; padding: 0.75rem 0.75rem 0.625rem; border-bottom: 1px solid var(--workspace-border); }
.workspace-pane-header h2 { font: var(--md-sys-typescale-title-small); }
.workspace-pane-kicker { display: block; overflow: hidden; margin-bottom: 0.2rem; color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); text-overflow: ellipsis; white-space: nowrap; }
.workspace-add-button { width: 1.875rem; height: 1.875rem; }
.workspace-document-list { display: flex; flex-direction: column; gap: 1px; padding: 0.375rem; }
.workspace-document-item { display: flex; flex-direction: column; align-items: flex-start; gap: 0.18rem; width: 100%; padding: 0.55rem 0.5rem; border: 1px solid transparent; border-radius: var(--md-sys-shape-corner-extra-small); background: transparent; color: var(--md-sys-color-on-surface); cursor: pointer; text-align: left; }
.workspace-document-item:hover { background: var(--workspace-panel-high); }
.workspace-document-item.selected { border-color: var(--md-sys-color-primary); background: var(--md-sys-color-primary-container); color: var(--md-sys-color-on-primary-container); }
.workspace-document-item-title { overflow: hidden; width: 100%; font: var(--md-sys-typescale-body-medium); 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); }
.workspace-new-document { display: flex; flex-direction: column; gap: 0.375rem; padding: 0.5rem; border-bottom: 1px solid var(--workspace-border); }
.workspace-compact-input { width: 100%; min-width: 0; padding: 0.4rem 0.5rem; border: 1px solid var(--md-sys-color-outline); border-radius: var(--md-sys-shape-corner-extra-small); background: var(--md-sys-color-surface); font-size: 0.8125rem; }
.workspace-compact-submit { align-self: flex-start; padding: 0.35rem 0.55rem; border: 0; border-radius: var(--md-sys-shape-corner-extra-small); background: var(--md-sys-color-primary); color: var(--md-sys-color-on-primary); cursor: pointer; font: var(--md-sys-typescale-label-small); }

.workspace-editor-pane { min-width: 0; overflow: auto; background: var(--md-sys-color-surface); }
.workspace-editor { display: flex; flex-direction: column; width: min(100%, 920px); min-height: calc(100vh - 110px); margin: 0 auto; padding: clamp(2rem, 6vh, 5.5rem) clamp(1rem, 5vw, 3rem) 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-display-small); font-weight: 700; letter-spacing: -0.03em; line-height: 1.12; outline: none; }
.workspace-document-title-input::placeholder { color: var(--md-sys-color-on-surface-variant); opacity: 0.7; }
.workspace-document-title-input:focus-visible { box-shadow: 0 2px 0 var(--md-sys-color-primary); }
.workspace-document-content { flex: 1; width: 100%; min-height: 55vh; padding: 0; border: 0; outline: 0; resize: none; background: transparent; color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-body-large); line-height: 1.75; }
.workspace-document-content:focus-visible { box-shadow: inset 2px 0 0 var(--md-sys-color-primary); }
.workspace-document-content-readonly { flex: 1; min-height: 55vh; white-space: pre-wrap; color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-body-large); line-height: 1.75; }
.workspace-inline-error,
.workspace-inline-note,
.workspace-inline-success { margin: 0 0 1rem; padding: 0.5rem 0.625rem; border-left: 2px solid; font: var(--md-sys-typescale-body-small); }
.workspace-inline-error { border-color: var(--md-sys-color-error); color: var(--md-sys-color-error); }
.workspace-inline-note { border-color: var(--md-sys-color-primary); color: var(--md-sys-color-on-surface-variant); }
.workspace-inline-success { border-color: var(--md-sys-color-success); color: var(--md-sys-color-on-surface-variant); }
.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: 1rem 0.875rem; border-bottom: 1px solid var(--workspace-border); }
.workspace-inspector-section h2 { margin-bottom: 0.875rem; font: var(--md-sys-typescale-title-small); }
.workspace-inspector-section dl { display: grid; gap: 0.35rem; }
.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 { justify-content: space-between; gap: 1rem; min-height: 28px; padding: 0.25rem 0.75rem; border-top: 1px solid var(--workspace-border); background: var(--md-sys-color-surface-container-low); color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); }
.workspace-status-shortcuts { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.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) 42%, transparent); }
.workspace-quick-open { width: min(92vw, 560px); overflow: hidden; border: 1px solid var(--md-sys-color-outline); border-radius: var(--md-sys-shape-corner-small); background: var(--md-sys-color-surface-container-high); box-shadow: var(--md-sys-elevation-3); }
.workspace-quick-open-header { justify-content: space-between; padding: 0.65rem 0.75rem; border-bottom: 1px solid var(--workspace-border); font: var(--md-sys-typescale-label-large); }
.workspace-quick-open-header kbd { padding: 0.125rem 0.3rem; border: 1px solid var(--workspace-border); color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); }
.workspace-quick-open-input { width: 100%; padding: 0.75rem; border: 0; border-bottom: 1px solid var(--workspace-border); outline: 0; background: transparent; font: var(--md-sys-typescale-body-large); }
.workspace-quick-open-results { max-height: 52vh; overflow: auto; padding: 0.375rem; }
.workspace-quick-open-item { display: flex; align-items: center; justify-content: space-between; gap: 1rem; width: 100%; padding: 0.625rem; border: 1px solid transparent; border-radius: var(--md-sys-shape-corner-extra-small); background: transparent; cursor: pointer; text-align: left; }
.workspace-quick-open-item:hover,
.workspace-quick-open-item.selected { border-color: var(--md-sys-color-primary); background: var(--md-sys-color-primary-container); }
.workspace-quick-open-item small { color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-label-small); }
.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; }

.repo-document-browser { padding: 1.25rem; border: 1px solid var(--md-sys-color-outline-subtle); border-radius: var(--md-sys-shape-corner-small); background: var(--md-sys-color-surface-container-low); }
.repo-document-browser-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.repo-document-browser-description { margin-top: 0.25rem; color: var(--md-sys-color-on-surface-variant); font: var(--md-sys-typescale-body-small); }
.repo-document-table { overflow: hidden; border: 1px solid var(--md-sys-color-outline-subtle); border-radius: var(--md-sys-shape-corner-small); }
.repo-document-table-header,
.repo-document-row { display: grid; grid-template-columns: minmax(0, 1fr) 10rem 8rem; gap: 1rem; align-items: center; padding: 0.65rem 0.875rem; }
.repo-document-table-header { color: var(--md-sys-color-on-surface-variant); background: var(--md-sys-color-surface-container); font: var(--md-sys-typescale-label-medium); }
.repo-document-row { border-top: 1px solid var(--md-sys-color-outline-subtle); background: var(--md-sys-color-surface-container-low); }
.repo-document-row:hover { background: var(--md-sys-color-surface-container); }
.repo-document-row-title { overflow: hidden; color: var(--md-sys-color-on-surface); font: var(--md-sys-typescale-body-medium); 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); text-align: right; }
.repo-document-empty { padding: 2rem 1rem; text-align: center; }
.repo-new-document-form { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--md-sys-color-outline-subtle); }

@media (min-width: 840px) {
  .workspace-inspector-pane { display: block; }
}

@media (max-width: 839px) {
  .workspace-layout { grid-template-columns: 44px minmax(0, 1fr); }
  .workspace-layout.outline-open,
  .workspace-layout.inspector-open,
  .workspace-layout.outline-open.inspector-open { grid-template-columns: 44px minmax(0, 1fr); }
  .workspace-outline-pane { position: absolute; z-index: 20; top: 0; bottom: 0; left: 44px; width: min(86vw, 300px); box-shadow: var(--md-sys-elevation-2); }
  .workspace-context-project { display: none; }
  .workspace-status-shortcuts { display: none; }
}

@media (max-width: 560px) {
  .workspace-topbar { gap: 0.375rem; padding-inline: 0.5rem; }
  .workspace-back span { display: none; }
  .workspace-save-status { display: none; }
  .workspace-toolbar-button { padding-inline: 0.45rem; }
  .workspace-editor { padding-top: 2rem; }
  .workspace-document-title-input,
  .workspace-document-title { font-size: 2rem; }
  .repo-document-table-header { display: none; }
  .repo-document-row { grid-template-columns: minmax(0, 1fr) auto; gap: 0.5rem; }
  .repo-document-row-action { grid-column: 1 / -1; text-align: left; }
}

.focus-mode .workspace-activity-rail { display: none; }
.focus-mode .workspace-layout { grid-template-columns: minmax(0, 1fr); }
.focus-mode .workspace-editor { width: min(100%, 900px); }

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