/* ===== Base (see shared/01-design-tokens.md) ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}
img, svg { display: block; max-width: 100%; }
ul[role='list'] { list-style: none; }
button, input, select { font: inherit; color: inherit; }
h1, h2, h3 { text-wrap: balance; line-height: 1.15; }
p { text-wrap: pretty; }
::selection { background: color-mix(in oklab, var(--color-primary) 30%, transparent); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
button { cursor: pointer; background: none; border: none; }
a, button, select, input {
  transition: color 180ms cubic-bezier(0.16,1,0.3,1), background 180ms cubic-bezier(0.16,1,0.3,1),
    border-color 180ms cubic-bezier(0.16,1,0.3,1), box-shadow 180ms cubic-bezier(0.16,1,0.3,1);
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--color-primary); color: #fff;
  padding: var(--space-2) var(--space-4); z-index: 100;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

/* ===== Tokens ===== */
:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;

  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.875rem; --radius-xl: 1.25rem; --radius-full: 9999px;

  --font-display: 'Clash Display', 'Arial Black', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  --content-wide: 1180px;

  /* Brand */
  --color-brand: #e63946;
  --color-brand-hover: #ff4d5e;

  /* Category accents (shared across themes, tuned per-theme below) */
  --cat-amber: #f5a623;
  --cat-blue: #3d7dfc;
  --cat-purple: #9b6bff;
  --cat-teal: #1fbfa6;
  --cat-orange: #fb7a2e;
  --cat-green: #3ecf6e;
}

/* ===== Dark theme (default) ===== */
[data-theme='dark'] {
  --color-bg: #0a0a0b;
  --color-surface: #151517;
  --color-surface-2: #1c1c1f;
  --color-border: #2a2a2e;
  --color-divider: #232326;
  --color-text: #f2f1ef;
  --color-text-muted: #9d9ba3;
  --color-text-faint: #6b6970;
  --color-primary: var(--color-brand);
  --color-primary-hover: var(--color-brand-hover);
  --shadow-md: 0 8px 24px rgb(0 0 0 / 0.4);
}

/* ===== Light theme ===== */
[data-theme='light'] {
  --color-bg: #f5f4f2;
  --color-surface: #ffffff;
  --color-surface-2: #fbfbfa;
  --color-border: #e1dfdb;
  --color-divider: #eae8e4;
  --color-text: #17161a;
  --color-text-muted: #5c5a61;
  --color-text-faint: #948f96;
  --color-primary: var(--color-brand);
  --color-primary-hover: #c8202f;
  --shadow-md: 0 8px 24px rgb(0 0 0 / 0.08);

  --cat-amber: #b5760a;
  --cat-blue: #2059d6;
  --cat-purple: #6f3fd1;
  --cat-teal: #0e8f7a;
  --cat-orange: #d3590f;
  --cat-green: #1e9e4c;
}

/* ===== Layout shell ===== */
.site-header {
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-bg);
  position: sticky; top: 0; z-index: 20;
}
.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.brand {
  display: flex; align-items: center; gap: var(--space-3);
  text-decoration: none; color: var(--color-text);
}
.brand-mark { color: var(--color-brand); flex-shrink: 0; }
.brand-mark-bg { fill: var(--color-text); }
[data-theme='dark'] .brand-mark-bg { fill: #ffffff; }
[data-theme='light'] .brand-mark-bg { fill: #0a0a0b; }
.brand-mark-fg { fill: var(--color-brand); stroke: var(--color-brand); }
.brand-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: 0.06em;
}
.tagline {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  font-weight: 500;
  flex: 1 1 200px;
  min-width: 160px;
}
.header-controls {
  display: flex; align-items: center; gap: var(--space-3);
  margin-left: auto;
}
.week-select-wrap { display: flex; }
.week-select {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: var(--space-2) var(--space-4);
  padding-right: var(--space-8);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%239d9ba3' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  cursor: pointer;
}
.week-select:hover { border-color: var(--color-brand); }
.icon-btn {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: var(--color-surface);
}
.icon-btn:hover { border-color: var(--color-brand); color: var(--color-brand); }

/* ===== Stats bar ===== */
.stats-bar {
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface-2);
}
.stats-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat-value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  color: var(--color-text);
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.search-wrap {
  position: relative;
  margin-left: auto;
  flex: 1 1 240px;
  max-width: 320px;
}
.search-icon {
  position: absolute; left: var(--space-3); top: 50%; transform: translateY(-50%);
  color: var(--color-text-faint);
  pointer-events: none;
}
#search-input {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4) var(--space-2) var(--space-10);
  font-size: var(--text-sm);
  color: var(--color-text);
}
#search-input:focus { border-color: var(--color-brand); }

/* ===== Categories grid ===== */
.categories {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-10) var(--space-6) var(--space-20);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
@media (max-width: 760px) {
  .categories { grid-template-columns: 1fr; padding: var(--space-8) var(--space-4) var(--space-16); }
  .category-head { flex-wrap: wrap; }
  .category-head-right { flex-wrap: wrap; }
}

.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--cat-color, var(--color-brand));
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.category-card[hidden] { display: none; }
.category-card.is-filtered-empty { opacity: 0.35; }

.category-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.category-head-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.history-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: var(--text-xs);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: #0a0a0b;
  background: var(--cat-color, var(--color-brand));
  border: 1px solid var(--cat-color, var(--color-brand));
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  white-space: nowrap;
  box-shadow: 0 2px 10px color-mix(in oklab, var(--cat-color, var(--color-brand)) 55%, transparent);
  transition: transform 0.12s ease, box-shadow 0.12s ease, filter 0.12s ease;
}
.history-btn:hover {
  filter: brightness(1.12);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px color-mix(in oklab, var(--cat-color, var(--color-brand)) 65%, transparent);
}
.history-btn:active { transform: translateY(0); }
.history-btn svg { flex-shrink: 0; }
.category-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.category-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--cat-color, var(--color-brand));
  flex-shrink: 0;
}
.category-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.song-list { display: flex; flex-direction: column; gap: var(--space-1); }
.song-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}
.song-row:last-child { border-bottom: none; }
.song-row[hidden] { display: none; }

.song-info { min-width: 0; }
.song-track {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  overflow-wrap: anywhere;
}
.song-artist {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  overflow-wrap: anywhere;
}
.song-artist mark, .song-track mark {
  background: color-mix(in oklab, var(--cat-color, var(--color-brand)) 35%, transparent);
  color: inherit;
  border-radius: 3px;
  padding: 0 2px;
}

.listen-link {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--cat-color, var(--color-brand));
  border: 1px solid var(--cat-color, var(--color-brand));
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  text-decoration: none;
  white-space: nowrap;
}
.listen-link:hover {
  background: var(--cat-color, var(--color-brand));
  color: #0a0a0b;
}
.listen-link svg { flex-shrink: 0; }

/* Category color assignment */
.category-card[data-color='amber'] { --cat-color: var(--cat-amber); }
.category-card[data-color='blue'] { --cat-color: var(--cat-blue); }
.category-card[data-color='purple'] { --cat-color: var(--cat-purple); }
.category-card[data-color='teal'] { --cat-color: var(--cat-teal); }
.category-card[data-color='orange'] { --cat-color: var(--cat-orange); }
.category-card[data-color='green'] { --cat-color: var(--cat-green); }

.empty-state {
  text-align: center;
  color: var(--color-text-muted);
  padding: var(--space-16) var(--space-6);
  max-width: var(--content-wide);
  margin: 0 auto;
}

/* ===== Modal (category history + weekly tracklist) ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: color-mix(in oklab, #000 65%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: 100;
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 560px;
  max-height: min(640px, 85vh);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
  flex-shrink: 0;
}
.modal-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
}
.modal-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}
.modal-close { flex-shrink: 0; }
.modal-body {
  padding: var(--space-5) var(--space-6);
  overflow-y: auto;
}

.history-week-group { margin-bottom: var(--space-5); }
.history-week-group:last-child { margin-bottom: 0; }
.history-week-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.history-empty, .modal-empty {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: var(--space-6) 0;
  text-align: center;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-8) var(--space-6);
  text-align: center;
  color: var(--color-text-faint);
  font-size: var(--text-xs);
}