/* ═══════════════════════════════════════════════════
   複利シミュレーター — 2ちゃん劇場 ゆったりお金まとめ
   5キャラ + 劇場テーマ
   ═══════════════════════════════════════════════════ */

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

:root, [data-theme="light"] {
  --color-bg: #f8f9fc;
  --color-surface: #ffffff;
  --color-surface-2: #f1f3f8;
  --color-border: #dde1ea;
  --color-divider: #e8ebf0;
  --color-text: #1a1d2b;
  --color-text-muted: #6b7080;
  --color-text-faint: #a0a5b4;
  --color-accent: #c4302b;
  --color-accent-hover: #a52722;
  --color-accent-light: #fce8e8;
  --color-accent-surface: #fdf2f2;
  --color-yt-red: #c4302b;

  /* Character colors */
  --color-pink: #e91e8c;
  --color-orange: #f59e0b;
  --color-green: #10b981;
  --color-blue: #3b82f6;
  --color-purple: #8b5cf6;

  /* Scenario colors */
  --color-scenario-custom: #1a56db;
  --color-scenario-conservative: #6b7080;
  --color-scenario-sp500: #0e9f6e;
  --color-scenario-bull: #e3520d;

  /* Semantic */
  --color-success: #0e9f6e;
  --color-warning: #c27803;
  --color-error: #c81e1e;

  /* Chart area fills */
  --color-principal-fill: rgba(26, 86, 219, 0.12);
  --color-gain-fill: rgba(14, 159, 110, 0.10);
  --color-accel-fill: rgba(227, 82, 13, 0.08);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 29, 43, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 29, 43, 0.06);
  --shadow-lg: 0 12px 40px rgba(26, 29, 43, 0.08);

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-xl: 1.125rem;

  --font-body: 'General Sans', 'Satoshi', -apple-system, 'Hiragino Sans', 'Yu Gothic UI', sans-serif;
  --font-display: 'Satoshi', 'General Sans', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --color-bg: #0f1119;
  --color-surface: #181b27;
  --color-surface-2: #1e2130;
  --color-border: #2d3148;
  --color-divider: #252840;
  --color-text: #e2e4ec;
  --color-text-muted: #8d92a8;
  --color-text-faint: #525774;
  --color-accent: #f87171;
  --color-accent-hover: #fca5a5;
  --color-accent-light: #3a1e1e;
  --color-accent-surface: #2d1616;
  --color-yt-red: #f87171;

  --color-pink: #f472b6;
  --color-orange: #fbbf24;
  --color-green: #34d399;
  --color-blue: #60a5fa;
  --color-purple: #a78bfa;

  --color-scenario-custom: #5b8def;
  --color-scenario-conservative: #8d92a8;
  --color-scenario-sp500: #34d399;
  --color-scenario-bull: #fb923c;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-error: #f87171;
  --color-principal-fill: rgba(91, 141, 239, 0.12);
  --color-gain-fill: rgba(52, 211, 153, 0.10);
  --color-accel-fill: rgba(251, 146, 60, 0.08);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.25);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.35);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0f1119;
    --color-surface: #181b27;
    --color-surface-2: #1e2130;
    --color-border: #2d3148;
    --color-divider: #252840;
    --color-text: #e2e4ec;
    --color-text-muted: #8d92a8;
    --color-text-faint: #525774;
    --color-accent: #f87171;
    --color-accent-hover: #fca5a5;
    --color-accent-light: #3a1e1e;
    --color-accent-surface: #2d1616;
    --color-yt-red: #f87171;
    --color-pink: #f472b6;
    --color-orange: #fbbf24;
    --color-green: #34d399;
    --color-blue: #60a5fa;
    --color-purple: #a78bfa;
    --color-scenario-custom: #5b8def;
    --color-scenario-conservative: #8d92a8;
    --color-scenario-sp500: #34d399;
    --color-scenario-bull: #fb923c;
    --color-success: #34d399;
    --color-warning: #fbbf24;
    --color-error: #f87171;
    --color-principal-fill: rgba(91, 141, 239, 0.12);
    --color-gain-fill: rgba(52, 211, 153, 0.10);
    --color-accel-fill: rgba(251, 146, 60, 0.08);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.25);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.35);
  }
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-group {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.logo-icon { color: var(--color-text); flex-shrink: 0; }

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* YouTube Subscribe Button (Header) */
.yt-subscribe-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius-xl);
  background: var(--color-yt-red);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.yt-subscribe-btn:hover {
  background: var(--color-accent-hover);
  transform: scale(1.03);
}
.yt-subscribe-btn svg { flex-shrink: 0; }

.theme-toggle {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--color-text-muted);
  cursor: pointer;
  border: none;
  background: none;
  transition: color var(--transition-fast), background var(--transition-fast);
}
.theme-toggle:hover { background: var(--color-surface-2); color: var(--color-text); }

/* --- Hero --- */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 1rem;
  text-align: center;
}

.hero-banner {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
  line-height: 0;
}

.hero-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 340px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.2rem + 2vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.hero-subtitle {
  font-size: clamp(0.9375rem, 0.85rem + 0.4vw, 1.0625rem);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Controls --- */
.controls-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.control-group { display: flex; flex-direction: column; gap: 0.375rem; }

.control-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}

.input-with-unit {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  transition: border-color var(--transition-fast);
}
.input-with-unit:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.input-with-unit input {
  width: 100%;
  border: none;
  background: none;
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  font-variant-numeric: tabular-nums lining-nums;
  outline: none;
}
.input-with-unit input::-webkit-inner-spin-button { opacity: 0; }

.unit {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-faint);
  white-space: nowrap;
}

/* Range Slider */
.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--color-divider);
  border-radius: 2px;
  outline: none;
  margin-top: 0.25rem;
  cursor: pointer;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-surface);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: transform var(--transition-fast);
}
.range-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.range-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-surface);
  cursor: pointer;
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.6875rem;
  color: var(--color-text-faint);
}

/* --- Scenarios --- */
.scenario-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 0.25rem;
}

.section-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.scenario-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.scenario-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.scenario-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
}
.scenario-chip.active {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.chip-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--chip-color);
  flex-shrink: 0;
}

.chip-rate {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  opacity: 0.7;
}

/* --- KPI --- */
.kpi-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}
.kpi-card:hover { box-shadow: var(--shadow-md); }

.kpi-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
  letter-spacing: 0.02em;
}

.kpi-value {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1.1rem + 0.6vw, 1.625rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.kpi-sub {
  font-size: 0.75rem;
  color: var(--color-text-faint);
  margin-top: 0.125rem;
  font-variant-numeric: tabular-nums;
}

.kpi-value.accent { color: var(--color-accent); }
.kpi-value.success { color: var(--color-success); }
.kpi-value.warning { color: var(--color-warning); }
.kpi-value.blue { color: var(--color-blue); }
.kpi-value.pink { color: var(--color-pink); }

/* --- Chart --- */
.chart-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.legend-swatch {
  width: 12px;
  height: 3px;
  border-radius: 2px;
  flex-shrink: 0;
}

.legend-swatch.area {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  opacity: 0.6;
}

.chart-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.chart-container canvas {
  width: 100% !important;
  height: auto !important;
  max-height: 500px;
}

.chart-note {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.note-highlight {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 600;
  color: var(--color-scenario-bull);
}
.note-highlight::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--color-scenario-bull);
  opacity: 0.25;
}

/* --- Milestones --- */
.milestone-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
}

.milestone-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
}

.milestone-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: box-shadow var(--transition-normal);
}
.milestone-card:hover { box-shadow: var(--shadow-md); }

.milestone-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-size: 1.25rem;
  font-weight: 700;
}
.milestone-icon.blue { background: var(--color-accent-light); color: var(--color-accent); }
.milestone-icon.green { background: color-mix(in srgb, var(--color-success) 12%, transparent); color: var(--color-success); }
.milestone-icon.orange { background: color-mix(in srgb, var(--color-warning) 12%, transparent); color: var(--color-warning); }

.milestone-info { flex: 1; min-width: 0; }

.milestone-target {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.125rem;
}

.milestone-detail {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.milestone-detail strong {
  color: var(--color-text);
  font-weight: 600;
}

.milestone-card.unreachable {
  opacity: 0.55;
}

.milestone-unreachable {
  font-size: 0.8125rem;
  color: var(--color-text-faint);
  font-style: italic;
}

/* --- Table --- */
.table-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
}

.table-wrapper {
  overflow-x: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums lining-nums;
}

.data-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-align: right;
  letter-spacing: 0.03em;
  text-transform: none;
  white-space: nowrap;
}
.data-table th:first-child { text-align: center; }

.data-table td {
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  text-align: right;
  border-bottom: 1px solid var(--color-divider);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}
.data-table td:first-child {
  text-align: center;
  font-weight: 600;
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

.data-table tbody tr:hover { background: var(--color-accent-surface); }

.data-table tbody tr.milestone-row {
  background: var(--color-accent-light);
}
.data-table tbody tr.milestone-row td {
  font-weight: 600;
  color: var(--color-accent);
}
.data-table tbody tr.milestone-row td:first-child { color: var(--color-accent); }

.data-table tbody tr.accel-row td:last-child::after {
  content: ' 🚀';
  font-size: 0.75rem;
}

/* --- Disclaimer --- */
.disclaimer-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
}

.disclaimer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.disclaimer-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.disclaimer-card h3 {
  font-family: var(--font-display);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.625rem;
  line-height: 1.4;
}

.disclaimer-card ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.disclaimer-card li {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  padding-left: 1rem;
  position: relative;
}

.disclaimer-card li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-text-faint);
}

/* --- Channel CTA --- */
.channel-cta-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 0;
}

.channel-cta-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: linear-gradient(160deg, var(--color-accent-light) 0%, var(--color-surface) 40%, var(--color-surface) 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 2rem 1.75rem;
  box-shadow: var(--shadow-md);
}

.cta-icon {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-border);
  box-shadow: var(--shadow-md);
  margin-bottom: 0.5rem;
}

.cta-channel-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.cta-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 1.25rem;
}

.cta-subscribe-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  border-radius: var(--radius-xl);
  background: var(--color-yt-red);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 14px rgba(196, 48, 43, 0.25);
}
.cta-subscribe-btn:hover {
  background: var(--color-accent-hover);
  transform: scale(1.04);
  box-shadow: 0 6px 20px rgba(196, 48, 43, 0.3);
}
.cta-subscribe-btn svg { flex-shrink: 0; }

/* --- Footer --- */
.footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 2rem;
}

.footer p {
  font-size: 0.75rem;
  color: var(--color-text-faint);
  text-align: center;
  line-height: 1.6;
}

.footer-channel {
  font-family: var(--font-display);
  font-weight: 600;
  margin-top: 0.375rem;
  color: var(--color-text-muted) !important;
  font-size: 0.8125rem !important;
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .hero { padding: 1.25rem 1rem 0.75rem; }
  .hero-banner { border-radius: var(--radius-md); margin-bottom: 1rem; }
  .hero-img { max-height: 220px; }
  .hero-title { font-size: clamp(1.375rem, 1rem + 2vw, 2rem); }

  .controls-section, .scenario-section, .kpi-section,
  .chart-section, .milestone-section, .table-section,
  .disclaimer-section, .channel-cta-section, .share-section,
  .legal-section, .footer {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .controls-grid { padding: 1rem; gap: 1rem; }
  .chart-container { padding: 0.5rem 0.25rem; }
  .chart-container canvas { max-height: 480px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .kpi-card { padding: 0.75rem; }
  .kpi-value { font-size: 1.125rem; }
  .scenario-chips { gap: 0.375rem; }
  .scenario-chip { padding: 0.375rem 0.625rem; font-size: 0.75rem; }
  .milestone-grid { grid-template-columns: 1fr; }
  .disclaimer-grid { grid-template-columns: 1fr; }

  .data-table th, .data-table td { padding: 0.5rem 0.625rem; font-size: 0.75rem; }

  .logo-text { font-size: 0.9375rem; }
  .yt-subscribe-btn { padding: 0.4rem; font-size: 0; gap: 0; border-radius: 50%; width: 2rem; height: 2rem; justify-content: center; }
  .yt-subscribe-btn svg { width: 16px; height: 16px; }

  .channel-cta-card { padding: 1.5rem 1.25rem; }
  .cta-icon { width: 80px; height: 80px; }
  .cta-channel-name { font-size: 1.125rem; }
  .disclaimer-grid { grid-template-columns: 1fr; }
}

/* --- Selection --- */
::selection {
  background: color-mix(in srgb, var(--color-accent) 25%, transparent);
  color: var(--color-text);
}

/* --- Focus --- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- Share Buttons --- */
.share-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
  text-align: center;
}

.share-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.share-btn-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.share-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.share-btn.share-x:hover { color: #000; border-color: #000; }
[data-theme="dark"] .share-btn.share-x:hover { color: #fff; border-color: #fff; }

.share-btn.share-line:hover { color: #06c755; border-color: #06c755; }
.share-btn.share-facebook:hover { color: #1877f2; border-color: #1877f2; }
.share-btn.share-copy:hover { color: var(--color-accent); border-color: var(--color-accent); }

.share-btn.copied {
  background: var(--color-success);
  color: #fff;
  border-color: var(--color-success);
}

/* --- Legal / Disclaimer (collapsible) --- */
.legal-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1.5rem 0;
}

.legal-details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.legal-summary {
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color var(--transition-fast);
}
.legal-summary:hover { color: var(--color-text); }
.legal-summary::-webkit-details-marker { display: none; }
.legal-summary::after {
  content: '▸';
  margin-left: auto;
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}
.legal-details[open] .legal-summary::after { transform: rotate(90deg); }

.legal-body {
  padding: 0 1.25rem 1.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}
.legal-body p {
  margin-bottom: 0.75rem;
}
.legal-body h4 {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: 1.25rem;
  margin-bottom: 0.375rem;
}
.legal-body strong {
  color: var(--color-text);
  font-weight: 600;
}

/* --- Album / Playlist Section --- */
.album-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 0;
}

.album-card {
  display: flex;
  gap: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: box-shadow var(--transition-normal);
}
.album-card:hover {
  box-shadow: var(--shadow-lg);
}

.album-cover-wrap {
  position: relative;
  flex-shrink: 0;
  width: 280px;
  aspect-ratio: 1;
  overflow: hidden;
}

.album-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.album-card:hover .album-cover {
  transform: scale(1.04);
}

.album-play-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.25);
  opacity: 0;
  transition: opacity var(--transition-normal);
  text-decoration: none;
}
.album-cover-wrap:hover .album-play-overlay {
  opacity: 1;
}

.album-play-btn {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  display: grid;
  place-items: center;
  color: var(--color-yt-red);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition-fast);
}
.album-play-btn:hover {
  transform: scale(1.1);
}
.album-play-btn svg {
  margin-left: 2px;
}

.album-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.5rem 1.5rem 1.5rem 0;
  min-width: 0;
}

.album-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-scenario-bull);
  margin-bottom: 0.5rem;
}

.album-title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 0.85rem + 0.6vw, 1.25rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.album-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.album-play-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-xl);
  background: var(--color-yt-red);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  width: fit-content;
  transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 2px 10px rgba(196, 48, 43, 0.2);
}
.album-play-link:hover {
  background: var(--color-accent-hover);
  transform: scale(1.03);
  box-shadow: 0 4px 16px rgba(196, 48, 43, 0.3);
}
.album-play-link svg {
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .album-card {
    flex-direction: column;
    gap: 0;
  }
  .album-cover-wrap {
    width: 100%;
    aspect-ratio: 1;
    max-height: 340px;
  }
  .album-info {
    padding: 1.25rem;
  }
  .album-section {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

/* --- Fan Chart Cohort Note --- */
.fan-cohort-note {
  font-size: 0.8125rem;
  color: var(--color-text-faint);
  font-weight: 500;
  margin-top: 0.25rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.kpi-card, .milestone-card {
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.kpi-card:nth-child(2), .milestone-card:nth-child(2) { animation-delay: 60ms; }
.kpi-card:nth-child(3), .milestone-card:nth-child(3) { animation-delay: 120ms; }
.kpi-card:nth-child(4) { animation-delay: 180ms; }
.kpi-card:nth-child(5) { animation-delay: 240ms; }