/* ============================================
   D&D 5e Course — Modern Mobile-First Stylesheet
   ============================================ */

/* --- Reset (streamlined) --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
  display: block;
}

/* --- Custom Properties --- */
:root {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-surface-raised: #232734;
  --color-border: #2e3347;
  --color-text: #c9cdd8;
  --color-text-bright: #e8ebf2;
  --color-text-dim: #7c8298;
  --color-heading-bg: #2563eb;
  --color-heading-text: #fff;
  --color-accent: #3b82f6;
  --color-accent-dim: #1d4ed8;
  --color-link: #60a5fa;
  --color-code-bg: #111318;
  --color-code-text: #34d399;
  --color-strong: #f1f5f9;
  --color-blockquote-bg: #1e2231;
  --color-table-border: #2e3347;
  --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --radius: 8px;
  --max-width: 960px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
}

/* --- Light theme override --- */
[data-theme="light"] {
  --color-bg: #f8f9fc;
  --color-surface: #ffffff;
  --color-surface-raised: #f1f3f8;
  --color-border: #d1d5e0;
  --color-text: #334155;
  --color-text-bright: #1e293b;
  --color-text-dim: #64748b;
  --color-heading-bg: #2563eb;
  --color-heading-text: #fff;
  --color-accent: #3b82f6;
  --color-accent-dim: #1d4ed8;
  --color-link: #2563eb;
  --color-code-bg: #f1f5f9;
  --color-code-text: #059669;
  --color-strong: #0f172a;
  --color-blockquote-bg: #eff6ff;
  --color-table-border: #cbd5e1;
}

[data-theme="light"] .mermaid .label text,
[data-theme="light"] .mermaid text {
  fill: #1f2937 !important;
}

[data-theme="light"] tr:nth-child(even) {
  background-color: rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .class-examples {
  background: rgba(0, 0, 0, 0.05);
}

/* --- Base --- */
html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  background-color: var(--color-bg);
  color: var(--color-text);
  padding: var(--space-md);
  max-width: var(--max-width);
  margin: 0 auto;
  overflow-wrap: break-word;
  word-wrap: break-word;
  transition: background-color 0.3s, color 0.3s;
}

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-heading-text);
  background-color: var(--color-heading-bg);
  line-height: 1.3;
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-xl) 0 var(--space-md) 0;
  border-radius: var(--radius);
}

h1 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  text-align: center;
  padding: var(--space-lg);
}

h2 {
  font-size: clamp(1.2rem, 3vw, 1.6rem);
}

h3 {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
}

h4 {
  font-size: clamp(0.95rem, 2vw, 1.1rem);
  background-color: var(--color-surface-raised);
  border-left: 4px solid var(--color-accent);
}

h5 {
  font-weight: 700;
  color: var(--color-text-bright);
  margin: var(--space-md) 0 var(--space-sm) 0;
  font-size: 1rem;
}

h6 {
  font-weight: 600;
  color: var(--color-text);
  margin: var(--space-sm) 0;
}

p {
  margin: var(--space-sm) 0 var(--space-md) 0;
}

strong, b {
  font-weight: 700;
  color: var(--color-strong);
}

em, i {
  font-style: italic;
}

small {
  font-size: 0.875rem;
}

sup {
  font-size: 0.75em;
  vertical-align: super;
}

sub {
  font-size: 0.75em;
  vertical-align: sub;
}

/* --- Links --- */
a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover, a:focus {
  color: var(--color-text-bright);
  text-decoration: underline;
}

h3 a, h4 a {
  color: var(--color-heading-text);
}

/* --- Lists --- */
ul, ol {
  margin: var(--space-sm) 0 var(--space-md) var(--space-lg);
}

ul li {
  list-style-type: disc;
  padding: var(--space-xs) 0;
}

ol li {
  list-style-type: decimal;
  padding: var(--space-xs) 0;
}

ul li ul, ol li ol, ul li ol, ol li ul {
  margin-left: var(--space-md);
  margin-top: var(--space-xs);
  margin-bottom: var(--space-xs);
}

dl {
  margin: var(--space-sm) 0 var(--space-md) var(--space-md);
}

dd {
  margin-left: var(--space-lg);
  padding-bottom: var(--space-sm);
}

/* --- Code & Pre --- */
code, pre {
  font-family: var(--font-mono);
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
  border-radius: 4px;
  font-size: 0.9em;
}

code {
  padding: 0.15em 0.4em;
}

pre {
  padding: var(--space-md);
  margin: var(--space-md) 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  line-height: 1.6;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: 0.85rem;
}

h1 code, h2 code, h3 code, h4 code,
p code, li code {
  background-color: var(--color-code-bg);
  padding: 0.1em 0.35em;
  margin: 0;
}

/* --- Tables --- */
table {
  width: 100%;
  margin: var(--space-md) 0;
  border-collapse: collapse;
  font-size: 0.9rem;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table, td, tr, th {
  border: 1px solid var(--color-table-border);
}

th, td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
}

th {
  background-color: var(--color-surface-raised);
  color: var(--color-text-bright);
  font-weight: 700;
}

tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.02);
}

/* --- Blockquote --- */
blockquote {
  margin: var(--space-md) 0;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-blockquote-bg);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text);
}

/* --- Images --- */
img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

/* --- Canvas --- */
canvas {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--space-md) auto;
}

/* --- SVG --- */
svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--space-md) auto;
}

/* --- Header & Footer --- */
header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

header p {
  color: var(--color-text-dim);
  font-style: italic;
}

footer {
  margin-top: var(--space-2xl);
  padding: var(--space-lg) 0 var(--space-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

/* --- Nav --- */
nav {
  margin: var(--space-md) 0 var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

nav ul li {
  list-style: none;
  padding: 0;
  margin: 0;
}

nav ul li a {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border-radius: 20px;
  background: var(--color-surface-raised);
  color: var(--color-link);
  font-size: 0.85rem;
  transition: background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

nav ul li a:hover {
  background: var(--color-accent);
  color: #fff;
  text-decoration: none;
}

/* --- Sections --- */
section {
  margin-bottom: var(--space-xl);
}

main {
  padding-bottom: var(--space-xl);
}

/* --- Mermaid Diagrams --- */
.mermaid_container, .mermaid-diagram, .mermaid {
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background-color: #fff;
  border-radius: var(--radius);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  text-align: center;
}

.mermaid svg {
  margin: 0 auto;
  display: block;
  max-width: 100%;
  height: auto;
}

.mermaid .label text,
.mermaid text {
  fill: #1f2937 !important;
}

.mermaid .flowchart-label text,
.mermaid .mindmap-node text,
.mermaid .mindmap-node .nodeText,
.mermaid .nodeLabel {
  fill: #1f2937 !important;
  color: #1f2937 !important;
}

.mermaid .node rect,
.mermaid .node circle,
.mermaid .node ellipse,
.mermaid .node polygon,
.mermaid .node path {
  fill: #f0f4ff;
  stroke: #94a3b8;
}

.mermaid .edgePath .path {
  stroke: #475569;
}

.mermaid .cluster rect {
  fill: #f8fafc;
  stroke: #94a3b8;
}

/* --- Buttons --- */
button {
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius);
  background: var(--color-accent);
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

button:hover {
  background: var(--color-accent-dim);
}

button:active {
  transform: scale(0.97);
}

/* --- Form inputs --- */
input[type="number"],
input[type="text"],
select {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  max-width: 100%;
}

input[type="checkbox"] {
  width: 1.1em;
  height: 1.1em;
  accent-color: var(--color-accent);
}

label {
  display: inline-block;
  margin: var(--space-xs) var(--space-sm) var(--space-xs) 0;
  color: var(--color-text);
}

/* --- Details/Summary --- */
details {
  margin: var(--space-md) 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-link);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* --- Analogy / Tip / Activity boxes --- */
.analogy-box,
.tips-section,
.example-box {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.analogy-box {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(16, 185, 129, 0.04));
  border-color: rgba(34, 197, 94, 0.25);
}

.example-box {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.06), rgba(248, 113, 113, 0.03));
  border-color: rgba(239, 68, 68, 0.2);
}

.tips-section {
  background: var(--color-surface);
}

.analogy-box h3,
.example-box h3,
.tips-section h3 {
  background: none;
  padding: 0;
  margin: var(--space-md) 0 var(--space-sm) 0;
  color: var(--color-text-bright);
}

.canvas-container {
  text-align: center;
  margin: var(--space-md) 0;
}

.activity {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
}

.preview-box {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(96, 165, 250, 0.04));
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius);
}

/* --- Character / Party cards --- */
.character-example,
.party-group,
.character {
  margin: var(--space-md) 0;
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.character-stats {
  margin: var(--space-sm) 0;
}

/* --- Role / Class / Scenario cards --- */
.role-card,
.school-card,
.scenario,
.action-type,
.component-card,
.principle,
.tool-card,
.pillar-card,
.interaction-card,
.technique-card,
.room-card,
.layer,
.level-card,
.step,
.challenge,
.mistake,
.growth-type,
.growth-arc,
.arc,
.synergy-detail,
.archetype-deep {
  margin: var(--space-md) 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.mistake {
  border-left: 4px solid #ef4444;
}

/* --- dnd_groups.html specific --- */
.archetype-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.archetype-card {
  padding: var(--space-lg);
  border-radius: var(--radius);
  border: 2px solid var(--color-border);
}

.archetype-card.tank {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(30, 64, 175, 0.08));
  border-color: #3b82f6;
}

.archetype-card.damage {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.12), rgba(153, 27, 27, 0.06));
  border-color: #ef4444;
}

.archetype-card.healer {
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.12), rgba(161, 98, 7, 0.06));
  border-color: #eab308;
}

.archetype-card.controller {
  background: linear-gradient(135deg, rgba(147, 51, 234, 0.12), rgba(107, 33, 168, 0.06));
  border-color: #a855f7;
}

.class-examples {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(0, 0, 0, 0.15);
  border-radius: 6px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.party-example {
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
  border-radius: var(--radius);
  border: 2px solid var(--color-border);
}

.party-example.classic {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(5, 150, 105, 0.05));
  border-color: #22c55e;
}

.party-example.unconventional {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(91, 33, 182, 0.05));
  border-color: #8b5cf6;
}

.party-example.charismatic {
  background: linear-gradient(135deg, rgba(217, 119, 6, 0.1), rgba(146, 64, 14, 0.05));
  border-color: #d97706;
}

.character-list {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.character-list .character {
  background: var(--color-surface-raised);
  border-left: 4px solid var(--color-accent);
}

.build-focus {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(59, 130, 246, 0.08);
  border-radius: 6px;
  font-style: italic;
  font-size: 0.9rem;
  border-left: 3px solid var(--color-accent);
}

/* --- dnd_names.html specifics --- */
.name-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  margin: var(--space-md) 0;
}

.name-card {
  background: var(--color-surface);
  padding: var(--space-md);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.name-card:hover {
  transform: translateY(-2px);
  border-left-color: var(--color-link);
}

.name-card .name {
  font-weight: 700;
  color: var(--color-text-bright);
  font-size: 1rem;
}

.name-card .origin {
  font-size: 0.85rem;
  color: var(--color-text-dim);
  font-style: italic;
}

.name-card .race-suggestion {
  font-size: 0.8rem;
  color: var(--color-link);
  margin-top: var(--space-xs);
}

/* --- Exercises --- */
.exercise {
  background: var(--color-surface);
  padding: var(--space-lg);
  margin: var(--space-md) 0;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  border-left: 4px solid #eab308;
}

/* --- Voice / Scene / NPC examples --- */
.voice-sample,
.scene-box,
.journal-entry,
.npc-showcase,
.dialogue-example {
  margin: var(--space-sm) 0;
  padding: var(--space-md);
  background: var(--color-surface-raised);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  font-size: 0.95rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  body {
    padding: var(--space-sm);
    font-size: 0.95rem;
  }

  h1 {
    font-size: 1.4rem;
    padding: var(--space-md);
  }

  h2 {
    font-size: 1.15rem;
    padding: var(--space-sm) var(--space-md);
  }

  h3 {
    font-size: 1.05rem;
    padding: var(--space-sm) var(--space-md);
  }

  h4 {
    font-size: 0.95rem;
    padding: var(--space-sm) var(--space-md);
  }

  nav ul {
    flex-direction: column;
    gap: var(--space-xs);
  }

  nav ul li a {
    display: block;
    text-align: center;
  }

  .archetype-grid {
    grid-template-columns: 1fr;
  }

  .name-grid {
    grid-template-columns: 1fr 1fr;
  }

  table {
    font-size: 0.8rem;
  }

  th, td {
    padding: var(--space-xs) var(--space-sm);
  }

  pre {
    font-size: 0.8rem;
    padding: var(--space-sm);
  }

  .analogy-box,
  .activity,
  .preview-box,
  .example-box,
  .tips-section,
  .role-card,
  .scenario,
  .party-example,
  .exercise {
    padding: var(--space-md);
  }

  blockquote {
    margin: var(--space-md) 0;
    padding: var(--space-md);
  }
}

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

  body {
    padding: var(--space-xs);
  }

  h1 {
    font-size: 1.2rem;
  }
}

/* --- Theme toggle button --- */
.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.25rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  transition: background 0.3s, border-color 0.3s;
  padding: 0;
}
.theme-toggle:hover {
  transform: scale(1.1);
}

/* --- Print --- */
@media print {
  body {
    background: #fff;
    color: #000;
    padding: 0;
  }

  h1, h2, h3, h4 {
    background: none;
    color: #000;
    border-bottom: 2px solid #000;
    padding: 0.5rem 0;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  nav, button, .mermaid, .theme-toggle {
    display: none;
  }
}