/* === Course Stylesheet — Turbo Draft Dota 2 === */

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2a2d3a;
  --text: #e4e6f0;
  --text-dim: #8b8fa8;
  --accent: #6c5ce7;
  --accent-glow: #a29bfe;
  --correct: #00d68f;
  --wrong: #ff6b6b;
  --gold: #ffd43b;
  --danger: #ff4757;
  --sidebar-w: 240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  max-width: 780px;
  margin: 0 auto;
  padding: 2rem 1.5rem 2rem 280px;
}

/* === Floating Sidebar === */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 250px;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 1.5rem 1rem;
  z-index: 100;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.sidebar-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 1rem;
}
.sidebar-title strong {
  display: block;
  font-size: 1rem;
  color: var(--accent-glow);
  margin-top: 0.2rem;
  letter-spacing: 0;
  text-transform: none;
}

.sidebar-section {
  margin-bottom: 1.2rem;
}
.sidebar-section h4 {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0.4rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
}

.sidebar a {
  display: block;
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 1px;
  transition: all 0.15s;
}
.sidebar a:hover {
  background: rgba(108,92,231,0.10);
  color: var(--text);
}
.sidebar a.active {
  background: rgba(108,92,231,0.18);
  color: var(--accent-glow);
  font-weight: 600;
  border-left: 2px solid var(--accent);
  padding-left: calc(0.6rem - 2px);
}

/* Mobile: hide sidebar, show hamburger */
@media (max-width: 900px) {
  body { padding: 1.5rem; }
  .sidebar { display: none; }
  .sidebar.open { display: block; width: 100%; position: fixed; z-index: 200; }
  .sidebar-toggle {
    display: flex !important;
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 300;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    width: 36px; height: 36px;
    align-items: center; justify-content: center;
    cursor: pointer;
    color: var(--text);
    font-size: 1.1rem;
  }
}
@media (min-width: 901px) {
  .sidebar-toggle { display: none; }
}

/* === Sidebar === */
.sidebar {
  width: var(--sidebar-w);
  background: #11131c;
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: 40;
  transition: transform 0.25s ease;
}
.sidebar h2 {
  font-size: 1rem;
  color: var(--accent-glow);
  margin-bottom: 0.3rem;
  border-bottom: none;
  padding-bottom: 0;
}
.sidebar .sidebar-home {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  text-decoration: none;
  padding: 0.3rem 0;
  margin-bottom: 1rem;
  transition: color 0.12s;
}
.sidebar .sidebar-home:hover { color: var(--accent-glow); text-decoration: none; }

.sidebar .sidebar-section {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin: 1.2rem 0 0.35rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
}
.sidebar .sidebar-link {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  text-decoration: none;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  margin: 0.1rem -0.5rem;
  transition: background 0.12s, color 0.12s;
}
.sidebar .sidebar-link:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.sidebar .sidebar-link.active { color: var(--accent-glow); background: rgba(108,92,231,0.12); font-weight: 600; }

.sidebar .sidebar-ruleset {
  margin-top: 1.2rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
}
.sidebar .sidebar-rule-tag {
  display: inline-block;
  font-size: 0.6rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.1em 0.45em;
  border-radius: 3px;
  margin: 0.15rem 0.15rem 0.15rem 0;
  background: var(--danger);
  color: #fff;
}

/* === Main Content === */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  max-width: 780px;
  padding: 2rem 2.5rem;
  min-height: 100vh;
}

/* === Mobile Toggle === */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 60;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.3rem;
  width: 40px;
  height: 40px;
  border-radius: 6px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 35;
}

/* Mobile breakpoint */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-overlay.show {
    display: block;
  }
  .sidebar-toggle {
    display: flex;
  }
  .main-content {
    margin-left: 0;
    padding: 3rem 1.2rem 2rem;
  }
}

/* === Keep original styles below === */

h1 {
  font-size: 2rem;
  color: var(--accent-glow);
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.35rem;
  color: #d4d0ff;
  margin: 2rem 0 0.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35rem;
}

h3 {
  font-size: 1.05rem;
  color: #c4c0f0;
  margin: 1.5rem 0 0.5rem;
}

p { margin-bottom: 1rem; }

a { color: var(--accent-glow); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { margin: 0.5rem 0 1rem 1.5rem; }
li { margin-bottom: 0.35rem; }

strong { color: #fff; }

code {
  background: var(--surface);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
  color: var(--gold);
}

/* === Info Box === */
.info-box {
  background: var(--surface);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.2rem;
  margin: 1.2rem 0;
  border-radius: 0 6px 6px 0;
}
.info-box strong { color: var(--accent-glow); }

/* === Rule Card === */
.rule-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.2rem;
  margin: 1rem 0;
}
.rule-card .rule-tag {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.15em 0.6em;
  border-radius: 3px;
  margin-bottom: 0.5rem;
}
.rule-card .rule-tag.ban   { background: var(--danger); color: #fff; }
.rule-card .rule-tag.must  { background: var(--gold); color: #111; }
.rule-card .rule-tag.mech  { background: var(--accent); color: #fff; }
.rule-card h3 { margin-top: 0; color: var(--text); }

/* === Comparison Table === */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
}
th {
  color: var(--accent-glow);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}
tr:hover td { background: rgba(108, 92, 231, 0.06); }

/* === Quiz === */
.quiz-block { margin: 2rem 0; }
.quiz-block .question {
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
  color: #fff;
}
.quiz-block .options { display: flex; flex-direction: column; gap: 0.4rem; }
.quiz-block .options button {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.6rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  font-size: 0.95rem;
  transition: background 0.15s, border-color 0.15s;
}
.quiz-block .options button:hover:not(:disabled) {
  background: #252838;
  border-color: var(--accent);
}
.quiz-block .options button.correct {
  background: rgba(0, 214, 143, 0.15);
  border-color: var(--correct);
  color: var(--correct);
}
.quiz-block .options button.wrong {
  background: rgba(255, 107, 107, 0.12);
  border-color: var(--wrong);
  color: var(--wrong);
}
.quiz-block .options button:disabled { cursor: default; }
.quiz-block .feedback {
  display: none;
  margin-top: 0.6rem;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
}
.quiz-block .feedback.show { display: block; }
.quiz-block .feedback.correct {
  background: rgba(0, 214, 143, 0.08);
  border: 1px solid rgba(0, 214, 143, 0.25);
}
.quiz-block .feedback.wrong {
  background: rgba(255, 107, 107, 0.08);
  border: 1px solid rgba(255, 107, 107, 0.25);
}

/* === Footer === */
.lesson-meta {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-dim);
}
.lesson-meta a { color: var(--accent-glow); }

.prompt {
  margin-top: 1rem;
  padding: 0.8rem 1rem;
  background: rgba(108, 92, 231, 0.08);
  border-radius: 6px;
  border: 1px solid rgba(108, 92, 231, 0.2);
}

/* === Hero List === */
.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.5rem;
  margin: 1rem 0;
}
.hero-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.4rem 0.7rem;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.hero-chip .role-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.role-dot.p1 { background: #ff6b6b; }
.role-dot.p2 { background: #74b9ff; }
.role-dot.p3 { background: #ffd43b; }
.role-dot.p4 { background: #00d68f; }
.role-dot.p5 { background: #fd79a8; }