/* ==========================================================================
   Wikipedia Tagger - Design System & Modern Stylesheet
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --bg-app: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-muted: #f1f5f9;
  --bg-input: #ffffff;
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-focus: #6366f1;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-border: #c7d2fe;
  --primary-glow: rgba(79, 70, 229, 0.15);

  --accent: #0ea5e9;
  --accent-light: #e0f2fe;

  --tag-color: #3b49df;
  --tag-bg: #eef2ff;
  --tag-hover-bg: #e0e7ff;
  --tag-bracket: #818cf8;
  --tag-border: #c7d2fe;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-float: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 9999px;

  --font-sans: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body[data-theme="dark"] {
  /* Color Palette - Dark Mode */
  --bg-app: #090d16;
  --bg-card: #111827;
  --bg-card-muted: #1e293b;
  --bg-input: #0f172a;
  --border-subtle: #1f293d;
  --border-strong: #334155;
  --border-focus: #818cf8;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;

  --primary: #818cf8;
  --primary-hover: #a5b4fc;
  --primary-light: rgba(99, 102, 241, 0.15);
  --primary-border: #3730a3;
  --primary-glow: rgba(129, 140, 248, 0.25);

  --accent: #38bdf8;
  --accent-light: rgba(56, 189, 248, 0.15);

  --tag-color: #93c5fd;
  --tag-bg: rgba(59, 130, 246, 0.15);
  --tag-hover-bg: rgba(59, 130, 246, 0.3);
  --tag-bracket: #60a5fa;
  --tag-border: rgba(96, 165, 250, 0.3);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-float: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   Base & Reset
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
}

/* App Container */
.app-container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ==========================================================================
   Header
   ========================================================================== */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.25rem;
  position: sticky;
  top: 0;
  background-color: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 100;
}

body[data-theme="dark"] .app-header {
  background-color: rgba(9, 13, 22, 0.85);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), #818cf8);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--primary-glow);
  flex-shrink: 0;
}

.header-title-group {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.title-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.app-title {
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-main);
  line-height: 1.2;
}

.app-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.badge-primary {
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.badge-outline {
  background-color: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
  display: inline-block;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Badge States */
.badge-loading .status-dot {
  background-color: #f59e0b;
  box-shadow: 0 0 8px #f59e0b;
}

.badge-ready .status-dot {
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
}

.badge-error .status-dot {
  background-color: #ef4444;
  box-shadow: 0 0 8px #ef4444;
}

/* Dictionary Load Progress Bar */
.load-progress-container {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.1rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.load-progress-info {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.load-spinner-mini {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.load-progress-track {
  width: 100%;
  height: 6px;
  background-color: var(--bg-input);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.load-progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius-pill);
  transition: width 0.2s ease;
}


/* ==========================================================================
   Buttons & Controls
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  text-decoration: none;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #6366f1);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), #4f46e5);
  box-shadow: 0 4px 14px var(--primary-glow);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background-color: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-strong);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--bg-card-muted);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-muted);
}

.btn-ghost:hover {
  background-color: var(--bg-card-muted);
  color: var(--text-main);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.75rem 1.6rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.icon-button {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-button:hover {
  background: var(--bg-card-muted);
  border-color: var(--border-strong);
  color: var(--primary);
}

body[data-theme="light"] .moon-icon { display: block; }
body[data-theme="light"] .sun-icon { display: none; }
body[data-theme="dark"] .moon-icon { display: none; }
body[data-theme="dark"] .sun-icon { display: block; }

/* ==========================================================================
   Info Banner & Sample Selector
   ========================================================================== */
.info-banner {
  background: linear-gradient(to right, var(--primary-light), var(--accent-light));
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  margin-bottom: 1rem;
}

.info-content {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
}

.info-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.info-text {
  font-size: 0.88rem;
  color: var(--text-main);
  line-height: 1.5;
}

.tag-example {
  background-color: var(--tag-bg);
  color: var(--primary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 600;
  border: 1px solid var(--tag-border);
}

.sample-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.sample-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.sample-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.sample-chip {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  user-select: none;
}

.sample-chip:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-border);
  color: var(--primary);
  transform: translateY(-1px);
}

/* ==========================================================================
   Workspace Grid (Dual Pane)
   ========================================================================== */
.workspace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
  align-items: stretch;
}

@media (max-width: 1024px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  border-color: var(--border-strong);
}

.panel-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-card);
  min-height: 56px;
}

.panel-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.panel-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.char-count {
  font-size: 0.78rem;
  color: var(--text-subtle);
  font-family: var(--font-mono);
  transition: color var(--transition-fast);
}

.char-count.char-limit-warning {
  color: var(--warning, #f59e0b);
  font-weight: 600;
}

.char-count.char-limit-exceeded {
  color: var(--danger, #ef4444);
  font-weight: 700;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==========================================================================
   Editor Panel (Left)
   ========================================================================== */
.editor-panel {
  display: flex;
  flex-direction: column;
}

.textarea-wrapper {
  padding: 1rem 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.main-textarea {
  width: 100%;
  min-height: 280px;
  flex: 1;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-main);
  background-color: var(--bg-input);
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.main-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.main-textarea::placeholder {
  color: var(--text-subtle);
  line-height: 1.7;
}

/* Options Drawer */
.options-wrapper {
  padding: 0 1.25rem 0.75rem;
}

.options-details {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--bg-card-muted);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.options-details[open] {
  border-color: var(--border-strong);
}

.options-summary {
  padding: 0.65rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.options-summary-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-main);
}

.options-hint {
  font-size: 0.75rem;
  color: var(--text-subtle);
  font-weight: 400;
}

.options-body {
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background-color: var(--bg-card);
}

.option-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.select-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.select-label {
  color: var(--text-main);
  font-size: 0.85rem;
}

.form-select {
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background-color: var(--bg-card);
  color: var(--text-main);
  font-family: inherit;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
}

.form-select:focus {
  border-color: var(--primary);
}

/* Custom Toggle Switch */
.toggle-control {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  user-select: none;
}

.toggle-control input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 20px;
  background-color: var(--border-strong);
  border-radius: 20px;
  transition: var(--transition-fast);
  flex-shrink: 0;
}

.toggle-slider::before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.toggle-control input:checked + .toggle-slider {
  background-color: var(--primary);
}

.toggle-control input:checked + .toggle-slider::before {
  transform: translateX(16px);
}

.toggle-label {
  color: var(--text-main);
  font-size: 0.84rem;
}

/* Panel Footer */
.panel-footer {
  padding: 0.9rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-card-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-hint {
  font-size: 0.75rem;
  color: var(--text-subtle);
}

kbd {
  background-color: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.1);
  padding: 0.15rem 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Viewer Panel (Right)
   ========================================================================== */
.viewer-panel {
  display: flex;
  flex-direction: column;
}

.stats-pills {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.stat-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.55rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 500;
}

.output-viewport {
  padding: 1.25rem;
  flex: 1;
  min-height: 380px;
  max-height: 520px;
  overflow-y: auto;
  background-color: var(--bg-input);
  display: flex;
  flex-direction: column;
}

/* Empty State */
.empty-state {
  margin: auto;
  text-align: center;
  max-width: 360px;
  padding: 2rem 1rem;
}

.empty-icon {
  color: var(--text-subtle);
  margin-bottom: 1rem;
  display: flex;
  justify-content: center;
}

.empty-state h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.empty-state p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Loading State */
.loading-state {
  margin: auto;
  text-align: center;
  padding: 2.5rem 1rem;
}

.spinner {
  width: 42px;
  height: 42px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 1.25rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state p {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Result Content */
.result-content {
  font-size: 1.05rem;
  line-height: 2.1;
  color: var(--text-main);
  word-break: break-word;
  user-select: text;
}

/* The Core Highlighted Wikipedia Tag Link */
.wiki-tag {
  color: var(--tag-color);
  background-color: var(--tag-bg);
  border: 1px solid var(--tag-border);
  padding: 0.1rem 0.45rem;
  margin: 0 0.15rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
  position: relative;
}

.wiki-tag:hover {
  background-color: var(--tag-hover-bg);
  color: var(--primary-hover);
  border-color: var(--primary);
  transform: translateY(-1.5px);
  box-shadow: 0 4px 8px var(--primary-glow);
}

.wiki-tag:active {
  transform: translateY(0);
}

/* Bracket Styling */
.tag-bracket {
  color: var(--tag-bracket);
  font-weight: 700;
  font-family: var(--font-mono);
  user-select: none;
}

/* Highlight pulse for term jumping */
.term-highlight-pulse {
  animation: term-pulse 1.4s ease-out;
}

@keyframes term-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0.7);
    background-color: #fef08a;
    color: #854d0e;
  }
  70% {
    box-shadow: 0 0 0 10px rgba(79, 70, 229, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(79, 70, 229, 0);
  }
}

/* ==========================================================================
   Detected Terms Index (Bottom of Viewer)
   ========================================================================== */
.terms-drawer {
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  padding: 0.85rem 1.25rem;
  max-height: 180px;
  display: flex;
  flex-direction: column;
}

.terms-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
  gap: 1rem;
}

.terms-title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  flex-shrink: 0;
}

.terms-filter {
  flex: 1;
  max-width: 200px;
}

.term-search {
  width: 100%;
  padding: 0.25rem 0.65rem;
  font-size: 0.78rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background-color: var(--bg-input);
  color: var(--text-main);
  outline: none;
}

.term-search:focus {
  border-color: var(--primary);
}

.terms-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  overflow-y: auto;
  padding-bottom: 0.25rem;
}

.term-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  background-color: var(--bg-card-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  color: var(--text-main);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.term-chip:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-border);
  color: var(--primary);
  transform: translateY(-1px);
}

.term-chip-count {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background-color: rgba(0,0,0,0.06);
  padding: 0.05rem 0.35rem;
  border-radius: var(--radius-pill);
}

body[data-theme="dark"] .term-chip-count {
  background-color: rgba(255,255,255,0.1);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about-card {
  padding: 2rem;
  margin-top: 1rem;
}

.about-heading {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-main);
  border-bottom: 2px solid var(--border-subtle);
  padding-bottom: 0.6rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
}

@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

.about-col h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
  color: var(--primary);
}

.about-list {
  padding-left: 1.25rem;
  color: var(--text-main);
  font-size: 0.88rem;
  line-height: 1.8;
}

.about-list li {
  margin-bottom: 0.5rem;
}

.about-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.reference-box {
  margin-top: 1.25rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-card-muted);
  border-left: 3px solid var(--primary);
}

.reference-title {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.reference-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.reference-desc a {
  color: var(--primary);
  text-decoration: underline;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.app-footer {
  margin-top: auto;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-subtle);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast-notification {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: #1e293b;
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-float);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  z-index: 1000;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all var(--transition-normal);
}

.toast-notification.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}