/* ============================================================================
   Natural Disasters CSS System (Web & Print PDF)
   Based: css-system-architecture.md
   Status: Active (Scoped to data-course="natural-disasters")
   Last Updated: 2026-11-10
   ============================================================================ */

[data-course="natural-disasters"] {
  /* ========================================================================
     1. Hazard-Type Semantic Palette
     ======================================================================== */
  --hazard-geologic:   #b91c1c; /* Red: Earthquakes, landslides, volcanoes */
  --hazard-geologic-bg: #fee2e2;
  --hazard-hydro:      #0369a1; /* Cyan: Floods, tsunamis, storm surge */
  --hazard-hydro-bg:   #e0f2fe;
  --hazard-weather:    #ea580c; /* Orange: Hurricanes, tornadoes, blizzards */
  --hazard-weather-bg: #fed7aa;
  --hazard-wildfire:   #dc2626; /* Crimson: Wildfire dynamics and risk */
  --hazard-wildfire-bg: #fecaca;
  --hazard-risk:       #7c3aed; /* Purple: Risk assessment and mitigation */
  --hazard-risk-bg:    #ede9fe;

  /* ========================================================================
     2. Structural & Neutral Palette
     ======================================================================== */
  --color-text-main:   #1f2937;
  --color-text-muted:  #6b7280;
  --color-bg-canvas:   #ffffff;
  --color-surface-sub: #f9fafb;
  --color-border-sub:  #e5e7eb;
  --color-border-hard: #d1d5db;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  
  --line-height-body:  1.65;
  --line-height-tight: 1.25;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

[data-course="natural-disasters"] body {
  font-family: var(--font-sans);
  color: var(--color-text-main);
  background-color: var(--color-bg-canvas);
  line-height: var(--line-height-body);
  font-size: 16px;
}

[data-course="natural-disasters"] h1,
[data-course="natural-disasters"] h2,
[data-course="natural-disasters"] h3,
[data-course="natural-disasters"] h4 {
  color: #111827;
  line-height: var(--line-height-tight);
  font-weight: 700;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

[data-course="natural-disasters"] h1 {
  font-size: 1.9rem;
  border-bottom: 2px solid var(--color-border-sub);
  padding-bottom: 0.3em;
}

[data-course="natural-disasters"] h2 {
  font-size: 1.5rem;
}

[data-course="natural-disasters"] h3 {
  font-size: 1.15rem;
}

[data-course="natural-disasters"] p {
  margin-bottom: 1em;
}

[data-course="natural-disasters"] .katex-display {
  background-color: var(--color-surface-sub);
  border-left: 4px solid var(--hazard-risk);
  padding: 1rem;
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
}

/* ============================================================================
   NotebookTask Components (RFC-035)
   ============================================================================ */

[data-course="natural-disasters"] .notebook-task {
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid var(--color-border-sub);
}

[data-course="natural-disasters"] .notebook-task-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  font-weight: 600;
  font-size: 0.95rem;
}

[data-course="natural-disasters"] .notebook-task-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.25rem 0.625rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

[data-course="natural-disasters"] .notebook-task[data-type="practice"] .notebook-task-header {
  background-color: var(--hazard-geologic-bg);
  border-bottom: 2px solid var(--hazard-geologic);
}

[data-course="natural-disasters"] .notebook-task[data-type="practice"] .notebook-task-badge {
  background-color: var(--hazard-geologic);
  color: white;
}

[data-course="natural-disasters"] .notebook-task[data-type="diagram"] .notebook-task-header {
  background-color: var(--hazard-hydro-bg);
  border-bottom: 2px solid var(--hazard-hydro);
}

[data-course="natural-disasters"] .notebook-task[data-type="diagram"] .notebook-task-badge {
  background-color: var(--hazard-hydro);
  color: white;
}

[data-course="natural-disasters"] .notebook-task[data-type="cer"] .notebook-task-header {
  background-color: var(--hazard-weather-bg);
  border-bottom: 2px solid var(--hazard-weather);
}

[data-course="natural-disasters"] .notebook-task[data-type="cer"] .notebook-task-badge {
  background-color: var(--hazard-weather);
  color: white;
}

[data-course="natural-disasters"] .notebook-task[data-type="derivation"] .notebook-task-header {
  background-color: var(--hazard-wildfire-bg);
  border-bottom: 2px solid var(--hazard-wildfire);
}

[data-course="natural-disasters"] .notebook-task[data-type="derivation"] .notebook-task-badge {
  background-color: var(--hazard-wildfire);
  color: white;
}

[data-course="natural-disasters"] .notebook-task[data-type="flowchart"] .notebook-task-header {
  background-color: var(--hazard-risk-bg);
  border-bottom: 2px solid var(--hazard-risk);
}

[data-course="natural-disasters"] .notebook-task[data-type="flowchart"] .notebook-task-badge {
  background-color: var(--hazard-risk);
  color: white;
}

/* ============================================================================
   Scientific Table Styling
   ============================================================================ */

[data-course="natural-disasters"] .table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 1.25rem 0;
  border: 1px solid var(--color-border-sub);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-canvas);
}

[data-course="natural-disasters"] table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

[data-course="natural-disasters"] th {
  background-color: #f3f4f6;
  color: var(--color-text-main);
  font-weight: 700;
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--color-border-hard);
  border-right: 1px solid var(--color-border-sub);
}

[data-course="natural-disasters"] th:last-child {
  border-right: none;
}

[data-course="natural-disasters"] td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border-sub);
  border-right: 1px solid var(--color-border-sub);
}

[data-course="natural-disasters"] td:last-child {
  border-right: none;
}

[data-course="natural-disasters"] tbody tr:hover {
  background-color: rgba(185, 28, 28, 0.05);
}

/* ============================================================================
   Print Media Optimization (PDF Generation)
   ============================================================================ */

@media print {
  [data-course="natural-disasters"] {
    --color-text-main: #000;
    --color-bg-canvas: #fff;
  }

  [data-course="natural-disasters"] .notebook-task {
    page-break-inside: avoid;
    border: 1.5px solid #000;
    margin: 0.5rem 0;
  }

  [data-course="natural-disasters"] .notebook-task-header {
    background-color: #f0f0f0 !important;
  }

  [data-course="natural-disasters"] table {
    page-break-inside: avoid;
  }

  [data-course="natural-disasters"] th {
    background-color: #e0e0e0 !important;
    border-bottom: 2px solid #000 !important;
  }

  [data-course="natural-disasters"] td {
    border-bottom: 1px solid #999 !important;
  }

  [data-course="natural-disasters"] .katex-display {
    page-break-inside: avoid;
  }
}