/* =========================================
   理科マイノート (Rika MyNote) - Extra CSS
   MkDocs Material Theme Enhancement
   ========================================= */

/* === CSS Custom Properties & Root Colors === */
:root {
  /* PDCA Color System */
  --pdca-plan-color: #2196F3;           /* Blue */
  --pdca-plan-light: #BBDEFB;           /* Blue-100 */
  --pdca-do-color: #FF9800;             /* Amber */
  --pdca-do-light: #FFE0B2;             /* Amber-100 */
  --pdca-check-color: #FF9800;          /* Amber (same as Do) */
  --pdca-action-color: #4CAF50;         /* Green */
  --pdca-action-light: #C8E6C9;         /* Green-100 */

  /* Typography */
  --font-family-jp: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --line-height-jp: 1.8;
  --paragraph-spacing: 1.5rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-md-color-scheme="slate"] {
  --pdca-plan-light: #1E3A8A;
  --pdca-do-light: #78350F;
  --pdca-action-light: #1B4332;
}

/* === Base Typography & Japanese Support === */
body {
  font-family: var(--font-family-jp);
  line-height: var(--line-height-jp);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-jp);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

p {
  margin-bottom: var(--paragraph-spacing);
  line-height: var(--line-height-jp);
}

/* === PDCA Content Styling === */
.pdca-plan,
.pdca-do,
.pdca-check,
.pdca-action {
  position: relative;
  padding-left: var(--spacing-lg);
  border-left: 4px solid transparent;
  margin: var(--spacing-lg) 0;
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  padding-right: var(--spacing-md);
}

.pdca-plan {
  border-left-color: var(--pdca-plan-color);
  background-color: rgba(33, 150, 243, 0.02);
}

.pdca-do,
.pdca-check {
  border-left-color: var(--pdca-do-color);
  background-color: rgba(255, 152, 0, 0.02);
}

.pdca-action {
  border-left-color: var(--pdca-action-color);
  background-color: rgba(76, 175, 80, 0.02);
}

[data-md-color-scheme="slate"] .pdca-plan {
  background-color: rgba(33, 150, 243, 0.05);
}

[data-md-color-scheme="slate"] .pdca-do,
[data-md-color-scheme="slate"] .pdca-check {
  background-color: rgba(255, 152, 0, 0.05);
}

[data-md-color-scheme="slate"] .pdca-action {
  background-color: rgba(76, 175, 80, 0.05);
}

/* === Dashboard Stats Container & Cards === */
.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(33, 150, 243, 0.05) 0%, rgba(76, 175, 80, 0.05) 100%);
  border-radius: var(--radius-lg);
}

@media (max-width: 768px) {
  .stats-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .stats-container {
    grid-template-columns: 1fr;
  }
}

.stat-card {
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.12));
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.stat-card:hover {
  border-color: var(--pdca-plan-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-number {
  font-size: 2.5em;
  font-weight: 700;
  color: var(--pdca-plan-color);
  display: block;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 0.95rem;
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.6));
  font-weight: 500;
}

[data-md-color-scheme="slate"] .stat-card {
  border-color: rgba(255, 255, 255, 0.12);
}

/* === Grid & Card Layout === */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid.cards {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.grid.cards .card {
  border: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.12));
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  background: var(--md-default-bg-color);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.grid.cards .card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--pdca-plan-color);
  transform: translateY(-4px);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--md-primary-fg-color);
}

.card-description {
  font-size: 0.95rem;
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.6));
  flex-grow: 1;
  margin-bottom: var(--spacing-md);
}

.card-link {
  color: var(--pdca-plan-color);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.card-link:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  .grid.cards {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (max-width: 480px) {
  .grid.cards {
    grid-template-columns: 1fr;
  }
}

[data-md-color-scheme="slate"] .grid.cards .card {
  border-color: rgba(255, 255, 255, 0.12);
}

/* === Progress Bars === */
.progress-container {
  width: 100%;
  height: 8px;
  background-color: var(--md-default-fg-color, rgba(0, 0, 0, 0.08));
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: var(--spacing-md) 0;
}

.progress-bar,
.progress-fill {
  height: 100%;
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--pdca-plan-color), var(--pdca-action-color));
  transition: width var(--transition-base);
}

.progress-bar {
  width: 0%;
}

.progress-label {
  display: block;
  font-size: 0.85rem;
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.6));
  margin-top: var(--spacing-sm);
  text-align: right;
  font-weight: 500;
}

[data-md-color-scheme="slate"] .progress-container {
  background-color: rgba(255, 255, 255, 0.08);
}

/* === Status Badges === */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition-fast);
}

.badge-done {
  background-color: var(--pdca-action-color);
  color: white;
}

.badge-done::before {
  content: "✓ ";
  margin-right: 0.25rem;
}

.badge-active {
  background-color: var(--pdca-do-color);
  color: white;
}

.badge-active::before {
  content: "→ ";
  margin-right: 0.25rem;
}

.badge-pending {
  background-color: var(--md-default-fg-color, rgba(0, 0, 0, 0.08));
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.54));
}

.badge-pending::before {
  content: "○ ";
  margin-right: 0.25rem;
}

[data-md-color-scheme="slate"] .badge-pending {
  background-color: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.7);
}

/* === This Week Highlight === */
.this-week {
  position: relative;
  font-weight: 600;
}

.this-week::before {
  content: "★";
  display: inline-block;
  margin-right: 0.5rem;
  color: var(--pdca-do-color);
  animation: twinkle 1.5s ease-in-out infinite;
}

.this-week-banner {
  background: linear-gradient(135deg, var(--pdca-do-color) 0%, #FF6F00 100%);
  color: white;
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  font-size: 1.1rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
}

.this-week-highlight {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: var(--spacing-xl) var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin: var(--spacing-xl) 0;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.6s ease-out;
}

.this-week-highlight h1,
.this-week-highlight h2 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.this-week-highlight p {
  color: rgba(255, 255, 255, 0.95);
  margin: 0;
}

/* === Research Highlight Section === */
.research-highlight {
  border-left: 4px solid var(--pdca-plan-color);
  padding-left: var(--spacing-lg);
  padding: var(--spacing-lg);
  padding-left: var(--spacing-lg);
  background-color: rgba(33, 150, 243, 0.02);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-sm);
}

.research-highlight h3 {
  color: var(--pdca-plan-color);
  margin-top: 0;
}

[data-md-color-scheme="slate"] .research-highlight {
  background-color: rgba(33, 150, 243, 0.05);
}

/* === Hero Section === */
.hero-title {
  font-size: 3em;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
  background: linear-gradient(135deg, var(--pdca-plan-color), var(--pdca-action-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.6));
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2em;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }
}

/* === Quick Navigation FAB === */
.quick-nav-fab {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pdca-plan-color), var(--pdca-action-color));
  color: white;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  z-index: 999;
}

.quick-nav-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 24px rgba(33, 150, 243, 0.3);
}

.quick-nav-fab.active {
  transform: rotate(45deg);
}

.quick-nav-panel {
  position: fixed;
  bottom: 5rem;
  right: 2rem;
  background: var(--md-default-bg-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 998;
  max-width: 300px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  border: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.12));
}

.quick-nav-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.quick-nav-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.12));
  font-weight: 600;
  color: var(--pdca-plan-color);
}

.quick-nav-body {
  padding: var(--spacing-md) 0;
}

.quick-nav-item {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--md-default-fg-color);
  text-decoration: none;
  transition: background-color var(--transition-fast);
  border-left: 3px solid transparent;
}

.quick-nav-item:hover {
  background-color: var(--pdca-plan-light);
  border-left-color: var(--pdca-plan-color);
  padding-left: calc(var(--spacing-lg) + 2px);
}

.quick-nav-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.12));
  font-size: 0.85rem;
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.54));
  text-align: center;
}

@media (max-width: 480px) {
  .quick-nav-fab {
    width: 48px;
    height: 48px;
    bottom: 1.5rem;
    right: 1.5rem;
  }

  .quick-nav-panel {
    bottom: 4rem;
    right: 1.5rem;
    max-width: 250px;
  }
}

[data-md-color-scheme="slate"] .quick-nav-panel {
  border-color: rgba(255, 255, 255, 0.12);
}

[data-md-color-scheme="slate"] .quick-nav-header {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

[data-md-color-scheme="slate"] .quick-nav-footer {
  border-top-color: rgba(255, 255, 255, 0.12);
}

/* === Keyboard Shortcuts Help Modal === */
.keyboard-help {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.12));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  max-height: 80vh;
  overflow-y: auto;
}

.keyboard-help.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.keyboard-help::backdrop {
  background: rgba(0, 0, 0, 0.3);
}

.keyboard-help-content {
  padding: var(--spacing-xl);
  max-width: 500px;
}

.keyboard-help h2 {
  margin-top: 0;
  color: var(--pdca-plan-color);
}

.keyboard-shortcut {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.08));
}

kbd {
  background-color: var(--md-default-fg-color, rgba(0, 0, 0, 0.04));
  border: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.12));
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.1);
}

[data-md-color-scheme="slate"] .keyboard-help {
  border-color: rgba(255, 255, 255, 0.12);
}

[data-md-color-scheme="slate"] kbd {
  background-color: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

/* === Timeline Component === */
.timeline {
  position: relative;
  padding: var(--spacing-lg) 0;
  margin: var(--spacing-xl) 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--pdca-plan-color), var(--pdca-action-color));
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: var(--spacing-lg);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 5px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: white;
  border: 3px solid var(--pdca-plan-color);
  z-index: 1;
}

.timeline-item.plan::before {
  border-color: var(--pdca-plan-color);
}

.timeline-item.do-check::before {
  border-color: var(--pdca-do-color);
}

.timeline-item.action::before {
  border-color: var(--pdca-action-color);
}

.timeline-title {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.timeline-description {
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.6));
  font-size: 0.95rem;
}

[data-md-color-scheme="slate"] .timeline-item::before {
  background: var(--md-default-bg-color);
}

/* === Footer & Metadata === */
.footer-note {
  text-align: center;
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg) 0;
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.54));
  font-size: 0.9rem;
  border-top: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.08));
}

.last-updated {
  display: block;
  font-size: 0.85rem;
  margin-top: var(--spacing-sm);
}

[data-md-color-scheme="slate"] .footer-note {
  border-top-color: rgba(255, 255, 255, 0.08);
}

/* === Enhanced Sidebar Navigation === */
.md-nav__link--active {
  font-size: 1.05rem;
  font-weight: 600;
}

.md-nav__link.pdca-plan {
  border-left: 3px solid var(--pdca-plan-color);
  padding-left: calc(var(--spacing-md) - 3px);
}

.md-nav__link.pdca-do,
.md-nav__link.pdca-check {
  border-left: 3px solid var(--pdca-do-color);
  padding-left: calc(var(--spacing-md) - 3px);
}

.md-nav__link.pdca-action {
  border-left: 3px solid var(--pdca-action-color);
  padding-left: calc(var(--spacing-md) - 3px);
}

/* === Admonition Enhancements === */
.md-typeset .admonition.plan,
.md-typeset details.plan {
  border-left-color: var(--pdca-plan-color);
  background-color: rgba(33, 150, 243, 0.02);
}

.md-typeset .admonition.plan > .admonition-title,
.md-typeset details.plan > summary {
  background-color: rgba(33, 150, 243, 0.1);
  color: var(--pdca-plan-color);
  font-weight: 600;
}

.md-typeset .admonition.do-check,
.md-typeset details.do-check {
  border-left-color: var(--pdca-do-color);
  background-color: rgba(255, 152, 0, 0.02);
}

.md-typeset .admonition.do-check > .admonition-title,
.md-typeset details.do-check > summary {
  background-color: rgba(255, 152, 0, 0.1);
  color: var(--pdca-do-color);
  font-weight: 600;
}

.md-typeset .admonition.action,
.md-typeset details.action {
  border-left-color: var(--pdca-action-color);
  background-color: rgba(76, 175, 80, 0.02);
}

.md-typeset .admonition.action > .admonition-title,
.md-typeset details.action > summary {
  background-color: rgba(76, 175, 80, 0.1);
  color: var(--pdca-action-color);
  font-weight: 600;
}

[data-md-color-scheme="slate"] .md-typeset .admonition.plan,
[data-md-color-scheme="slate"] .md-typeset details.plan {
  background-color: rgba(33, 150, 243, 0.05);
}

[data-md-color-scheme="slate"] .md-typeset .admonition.do-check,
[data-md-color-scheme="slate"] .md-typeset details.do-check {
  background-color: rgba(255, 152, 0, 0.05);
}

[data-md-color-scheme="slate"] .md-typeset .admonition.action,
[data-md-color-scheme="slate"] .md-typeset details.action {
  background-color: rgba(76, 175, 80, 0.05);
}

/* === Smooth Animations & Keyframes === */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes popIn {
  0% {
    opacity: 0;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes twinkle {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

/* === Page Content Transitions === */
.md-content {
  animation: slideIn 0.4s ease-out;
}

.md-main {
  animation: slideIn 0.4s ease-out;
}

/* === Print Styles === */
@media print {
  .md-header,
  .md-sidebar,
  .md-nav,
  .quick-nav-fab,
  .quick-nav-panel,
  .footer-note,
  .this-week-banner,
  .md-footer {
    display: none !important;
  }

  .md-main {
    width: 100% !important;
  }

  .md-content {
    max-width: 100% !important;
    padding: 0 !important;
  }

  body {
    background: white;
    color: black;
  }

  .stat-card,
  .grid.cards .card {
    page-break-inside: avoid;
    box-shadow: none;
    border: 1px solid #999;
  }

  .progress-container {
    border: 1px solid #999;
  }

  .badge {
    border: 1px solid #999;
    padding: 2px 6px;
  }

  a {
    color: #0066cc;
    text-decoration: underline;
  }
}

/* === Dark Mode Specific Adjustments === */
[data-md-color-scheme="slate"] {
  /* Cards in dark mode */
  [data-md-color-scheme="slate"] .stat-card,
  [data-md-color-scheme="slate"] .grid.cards .card {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.12);
  }

  [data-md-color-scheme="slate"] .stat-card:hover,
  [data-md-color-scheme="slate"] .grid.cards .card:hover {
    border-color: var(--pdca-plan-color);
  }

  /* Progress bars in dark mode */
  [data-md-color-scheme="slate"] .progress-container {
    background-color: rgba(255, 255, 255, 0.08);
  }

  /* Badges in dark mode */
  [data-md-color-scheme="slate"] .badge-done {
    background-color: var(--pdca-action-color);
    color: white;
  }

  [data-md-color-scheme="slate"] .badge-active {
    background-color: var(--pdca-do-color);
    color: white;
  }

  /* This week banner in dark mode */
  [data-md-color-scheme="slate"] .this-week-banner {
    background: linear-gradient(135deg, #FF9800 0%, #FF6F00 100%);
  }

  /* Hero section in dark mode */
  [data-md-color-scheme="slate"] .hero-subtitle {
    color: rgba(255, 255, 255, 0.7);
  }

  /* Keyboard help in dark mode */
  [data-md-color-scheme="slate"] .keyboard-shortcut {
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }

  /* Navigation FAB in dark mode */
  [data-md-color-scheme="slate"] .quick-nav-item:hover {
    background-color: rgba(33, 150, 243, 0.1);
  }
}

/* === Responsive Typography === */
@media (max-width: 768px) {
  .md-typeset h1 {
    font-size: 1.8rem;
  }

  .md-typeset h2 {
    font-size: 1.5rem;
  }

  .hero-title {
    font-size: 2rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .md-typeset h1 {
    font-size: 1.5rem;
  }

  .md-typeset h2 {
    font-size: 1.3rem;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .stat-number {
    font-size: 1.75rem;
  }

  .stats-container {
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }
}

/* === Utility Classes === */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.54));
}

.text-primary {
  color: var(--pdca-plan-color);
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

/* === Code Block Enhancements === */
.md-typeset code {
  background: var(--pdca-plan-light);
  color: var(--pdca-plan-color);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: 'Courier New', Courier, monospace;
}

[data-md-color-scheme="slate"] .md-typeset code {
  background: rgba(33, 150, 243, 0.2);
}

.md-typeset pre {
  background: var(--md-code-bg-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--md-default-fg-color, rgba(0, 0, 0, 0.08));
}

/* === Table Enhancements === */
.md-typeset table {
  border-collapse: collapse;
  box-shadow: var(--shadow-sm);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.md-typeset th {
  background: linear-gradient(135deg, var(--pdca-plan-light) 0%, rgba(33, 150, 243, 0.1) 100%);
  color: var(--pdca-plan-color);
  font-weight: 600;
}

.md-typeset td {
  padding: var(--spacing-md);
  border-color: var(--md-default-fg-color, rgba(0, 0, 0, 0.08));
}

.md-typeset tr:hover {
  background-color: rgba(33, 150, 243, 0.02);
}

[data-md-color-scheme="slate"] .md-typeset th {
  background: linear-gradient(135deg, rgba(33, 150, 243, 0.2) 0%, rgba(33, 150, 243, 0.1) 100%);
}

[data-md-color-scheme="slate"] .md-typeset tr:hover {
  background-color: rgba(33, 150, 243, 0.05);
}

/* === Link Styling === */
.md-typeset a {
  color: var(--pdca-plan-color);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

.md-typeset a:hover {
  border-bottom-color: var(--pdca-plan-color);
}

/* === Blockquote Styling === */
.md-typeset blockquote {
  border-left: 4px solid var(--pdca-plan-color);
  padding-left: var(--spacing-lg);
  margin-left: 0;
  color: var(--md-default-fg-color, rgba(0, 0, 0, 0.6));
  font-style: italic;
}

[data-md-color-scheme="slate"] .md-typeset blockquote {
  color: rgba(255, 255, 255, 0.7);
}

/* === Horizontal Rule Styling === */
.md-typeset hr {
  border: none;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--pdca-plan-color), transparent);
  margin: var(--spacing-xl) 0;
}

/* === Grade Cards (Dashboard) === */
.grade-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg, 1.5rem);
  margin: var(--spacing-lg, 1.5rem) 0;
}

.grade-card {
  border: 1px solid var(--md-default-fg-color--lightest, rgba(0,0,0,0.07));
  border-radius: 12px;
  padding: var(--spacing-lg, 1.5rem);
  background: var(--md-default-bg-color, #fff);
  transition: all 0.3s ease;
}

.grade-card:hover {
  border-color: var(--md-primary-fg-color, #4CAF50);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.grade-card h3 {
  margin-top: 0;
  color: var(--md-primary-fg-color, #4CAF50);
}

.progress-track {
  width: 100%;
  height: 6px;
  background: var(--md-default-fg-color--lightest, rgba(0,0,0,0.07));
  border-radius: 3px;
  overflow: hidden;
  margin: 0.75rem 0 0.5rem 0;
}

.progress-track .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--md-primary-fg-color, #4CAF50), #45a049);
  border-radius: 3px;
  transition: width 0.6s ease;
}

.progress-label {
  font-size: 0.85em;
  color: var(--md-default-fg-color--light, rgba(0,0,0,0.54));
  text-align: right;
  margin-top: 0.25rem;
}

/* === Resource Cards === */
.resource-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg, 1.5rem);
  margin: var(--spacing-lg, 1.5rem) 0;
}

.resource-card {
  border: 1px solid var(--md-default-fg-color--lightest, rgba(0,0,0,0.07));
  border-radius: 12px;
  padding: var(--spacing-lg, 1.5rem);
  background: var(--md-default-bg-color, #fff);
  transition: all 0.3s ease;
}

.resource-card:hover {
  border-color: var(--md-primary-fg-color, #4CAF50);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.resource-card h3 {
  margin-top: 0;
  color: var(--md-primary-fg-color, #4CAF50);
  font-size: 1.1em;
}

.resource-card p {
  font-size: 0.95em;
  color: var(--md-default-fg-color--light, rgba(0,0,0,0.54));
}

/* === Hero Section === */
.hero-section {
  text-align: center;
  padding: var(--spacing-xl, 2rem) 0;
}

.hero-subtitle {
  font-size: 1.05em;
  color: var(--md-default-fg-color--light, rgba(0,0,0,0.54));
}

.hero-description {
  font-size: 1.15em;
  line-height: 1.8;
  max-width: 700px;
  margin: 1rem auto;
  color: var(--md-default-fg-color, #000);
}

/* === Dark Mode: Grade & Resource Cards === */
[data-md-color-scheme="slate"] .grade-card,
[data-md-color-scheme="slate"] .resource-card {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.1);
}

[data-md-color-scheme="slate"] .grade-card:hover,
[data-md-color-scheme="slate"] .resource-card:hover {
  border-color: var(--md-primary-fg-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

/* === Footer Note === */
.footer-note {
  text-align: center;
  color: var(--md-default-fg-color--light, rgba(0,0,0,0.54));
  font-size: 0.9em;
  padding: var(--spacing-xl, 2rem) 0;
  border-top: 1px solid var(--md-default-fg-color--lightest, rgba(0,0,0,0.07));
  margin-top: var(--spacing-xl, 2rem);
}

/* === This Week List (homepage container) === */
.this-week-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.75rem;
}

.this-week-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 8px;
  text-decoration: none !important;
  color: #222 !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.this-week-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.this-week-grade {
  font-size: 0.75em;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: var(--md-primary-fg-color, #4CAF50);
  color: white;
}

.this-week-unit {
  font-weight: 600;
  color: #222;
}

.this-week-period {
  font-size: 0.8em;
  color: #666;
  white-space: nowrap;
}

.this-week-empty {
  text-align: center;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
  padding: 1rem 0;
}

[data-md-color-scheme="slate"] .this-week-item {
  background: rgba(255, 255, 255, 0.1);
  color: #eee !important;
}

[data-md-color-scheme="slate"] .this-week-unit {
  color: #eee;
}

[data-md-color-scheme="slate"] .this-week-period {
  color: #bbb;
}

/* === Sidebar: "This Week" highlight === */
.md-nav__link.this-week {
  font-weight: 700;
  color: var(--md-primary-fg-color, #4CAF50) !important;
  position: relative;
}

.md-nav__link.this-week::before {
  content: "●";
  color: var(--md-accent-fg-color, #FF9800);
  margin-right: 0.35rem;
  font-size: 0.7em;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

/* === Keyboard help modal overlay === */
.keyboard-help {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.keyboard-help-content {
  background: var(--md-default-bg-color, #fff);
  color: var(--md-default-fg-color, #222);
  border-radius: 12px;
  padding: 2rem 2.5rem;
  max-width: 420px;
  width: 90%;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: translateY(-12px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.keyboard-help-content h3 {
  margin: 0 0 1rem 0;
  color: var(--md-primary-fg-color, #4CAF50);
}

.keyboard-help-content ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.keyboard-help-content li {
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95em;
}

.keyboard-help-content kbd {
  display: inline-block;
  min-width: 1.75rem;
  padding: 0.2rem 0.45rem;
  background: var(--md-code-bg-color, #f5f5f5);
  border: 1px solid var(--md-default-fg-color--lightest, rgba(0,0,0,0.1));
  border-radius: 4px;
  font-family: var(--md-code-font, monospace);
  font-size: 0.85em;
  text-align: center;
  box-shadow: 0 1px 0 rgba(0,0,0,0.1);
}

.keyboard-help-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--md-default-fg-color--light, rgba(0,0,0,0.54));
  border-radius: 50%;
  transition: background 0.15s;
}

.keyboard-help-close:hover {
  background: var(--md-code-bg-color, rgba(0,0,0,0.05));
}

/* === Quick-nav FAB polish === */
.quick-nav-fab {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--md-primary-fg-color, #4CAF50);
  color: white;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

.quick-nav-fab:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.25);
}

.quick-nav-panel {
  position: fixed;
  bottom: 5.25rem;
  right: 1.5rem;
  width: 260px;
  background: var(--md-default-bg-color, #fff);
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

.quick-nav-panel.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.quick-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--md-default-fg-color--lightest, rgba(0,0,0,0.07));
  background: var(--md-primary-fg-color, #4CAF50);
  color: white;
}

.quick-nav-header h3 {
  margin: 0;
  font-size: 0.95rem;
  color: white;
}

.quick-nav-close {
  background: none;
  border: none;
  color: white;
  font-size: 1.4rem;
  cursor: pointer;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.quick-nav-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.quick-nav-body {
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.quick-nav-item {
  display: block;
  padding: 0.65rem 0.85rem;
  text-decoration: none;
  color: var(--md-default-fg-color, #222) !important;
  border-radius: 6px;
  font-size: 0.92rem;
  transition: background 0.15s, color 0.15s;
}

.quick-nav-item:hover {
  background: var(--md-code-bg-color, rgba(76, 175, 80, 0.08));
  color: var(--md-primary-fg-color, #4CAF50) !important;
}

/* === Abbreviation styling === */
abbr {
  cursor: help;
  border-bottom: 1px dotted var(--md-default-fg-color--light, rgba(0,0,0,0.4));
  text-decoration: none;
}

/* === PDCA Admonitions (custom) === */
.md-typeset .admonition.plan,
.md-typeset details.plan {
  border-color: #2196F3;
}
.md-typeset .plan > .admonition-title,
.md-typeset .plan > summary {
  background-color: rgba(33, 150, 243, 0.1);
  border-color: #2196F3;
}
.md-typeset .plan > .admonition-title::before,
.md-typeset .plan > summary::before {
  background-color: #2196F3;
  -webkit-mask-image: var(--md-admonition-icon--note);
  mask-image: var(--md-admonition-icon--note);
}

.md-typeset .admonition.do-check,
.md-typeset details.do-check {
  border-color: #FF9800;
}
.md-typeset .do-check > .admonition-title,
.md-typeset .do-check > summary {
  background-color: rgba(255, 152, 0, 0.1);
  border-color: #FF9800;
}
.md-typeset .do-check > .admonition-title::before,
.md-typeset .do-check > summary::before {
  background-color: #FF9800;
  -webkit-mask-image: var(--md-admonition-icon--example);
  mask-image: var(--md-admonition-icon--example);
}

.md-typeset .admonition.action,
.md-typeset details.action {
  border-color: #4CAF50;
}
.md-typeset .action > .admonition-title,
.md-typeset .action > summary {
  background-color: rgba(76, 175, 80, 0.1);
  border-color: #4CAF50;
}
.md-typeset .action > .admonition-title::before,
.md-typeset .action > summary::before {
  background-color: #4CAF50;
  -webkit-mask-image: var(--md-admonition-icon--success);
  mask-image: var(--md-admonition-icon--success);
}

/* === End of extra.css === */