/* ============================================================
   Саундтрек /soundtrack — «Тактический минимум»
   Базис и общие классы (.t-*, токены --t-*) — в styleTactical.css.
   ТЗ: design/tactical-style/STYLE-GUIDE.md.
   Контракты public/js/soundtrack.js: .st-track[data-src] (+ классы
   .is-current / .is-playing), [data-action]. Нижняя панель плеера —
   глобальная, её стили в styleSoundtrackPlayer.css.
   ============================================================ */

.st-page {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px 80px;
  color: var(--t-text);
  font-family: var(--t-font-body);
}

/* ── Шапка раздела ── */

.st-hero {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 64px 0 40px;
}

.st-hero-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.st-hero-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.st-hero-title {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.1;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.65);
}

.st-hero-sub {
  margin: 0;
  max-width: 460px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--t-text-muted);
}

.st-hero-label {
  margin: 0;
  letter-spacing: 2px;
}

/* ── Альбом ── */

.st-album {
  position: relative;
  padding: 24px 28px 12px;
  margin-bottom: 40px;
}

.st-album-head {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
  align-items: start;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--t-line);
}

/* Типографская обложка: квадрат «второго тёмного» с брендом и датой */
.st-cover {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: #101114;
  border: 1px solid var(--t-panel-border);
  background-image:
    linear-gradient(var(--t-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--t-grid-line) 1px, transparent 1px);
  background-size: 18px 18px;
}

.st-cover-brand {
  font-size: 52px;
  line-height: 1;
}

.st-cover-line {
  width: 36px;
  height: 1px;
  background: var(--t-red);
}

.st-cover-date {
  font-family: var(--t-font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--t-text-muted);
}

.st-cover-corner {
  position: absolute;
  width: 14px;
  height: 14px;
}

.st-cover-corner--tl {
  top: 6px;
  left: 6px;
  border-top: 2px solid var(--t-red);
  border-left: 2px solid var(--t-red);
}

.st-cover-corner--br {
  bottom: 6px;
  right: 6px;
  border-bottom: 2px solid var(--t-red);
  border-right: 2px solid var(--t-red);
}

.st-album-info {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.st-album-title {
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.2;
}

.st-album-sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: #c9ced8;
}

.st-album-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 0;
  margin: 0;
  letter-spacing: 2px;
}

.st-album-meta span + span::before {
  content: '·';
  margin: 0 10px;
  color: var(--t-text-faint);
}

.st-album-actions {
  display: flex;
  gap: 12px;
  margin-top: 4px;
}

.st-album-play {
  padding: 14px 26px;
}

/* ── Список треков ── */

.st-tracks {
  list-style: none;
  margin: 0;
  padding: 0;
}

.st-track {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr auto auto;
  align-items: center;
  gap: 16px;
  padding: 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.18s ease;
}

.st-track:first-child {
  border-top: none;
}

.st-track:hover {
  background: rgba(255, 255, 255, 0.025);
}

.st-track.is-current {
  background: rgba(220, 53, 69, 0.08);
}

.st-track.is-current::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--t-red);
}

/* Кнопка-номер: по умолчанию виден номер, на ховере/в фокусе — play, у текущего — пауза/эквалайзер */
.st-track-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: none;
  color: var(--t-text);
  cursor: pointer;
}

.st-track-btn .st-ico,
.st-track-btn .st-track-bars {
  position: absolute;
  display: none;
}

.st-track-btn .st-track-num {
  color: var(--t-text-faint);
  font-size: 11px;
  letter-spacing: 2px;
}

/* Таблица состояний: номер → play (ховер/фокус/текущий на паузе) →
   эквалайзер (играет) → pause (играет + ховер/фокус) */
.st-track:hover .st-track-num,
.st-track-btn:focus-visible .st-track-num,
.st-track.is-current .st-track-num {
  visibility: hidden;
}

.st-track:hover .st-ico--play,
.st-track-btn:focus-visible .st-ico--play,
.st-track.is-current .st-ico--play {
  display: block;
}

.st-track.is-playing .st-ico--play,
.st-track.is-playing:hover .st-track-bars,
.st-track.is-playing .st-track-btn:focus-visible ~ .st-track-bars {
  display: none;
}

.st-track.is-playing .st-track-bars {
  display: flex;
}

.st-track.is-playing:hover .st-ico--pause,
.st-track.is-playing .st-track-btn:focus-visible .st-ico--pause {
  display: block;
}

.st-track.is-playing:hover .st-track-bars,
.st-track.is-playing .st-track-btn:focus-visible .st-track-bars {
  display: none;
}

.st-track-btn:hover,
.st-track.is-current .st-track-btn {
  color: var(--t-red-bright);
}

/* Эквалайзер текущего трека — три столбика; движение только в высоте, без свечений */
.st-track-bars {
  align-items: flex-end;
  gap: 2px;
  height: 14px;
}

.st-track-bars i {
  display: block;
  width: 3px;
  height: 30%;
  background: var(--t-red-bright);
  animation: st-bars 0.9s ease-in-out infinite;
}

.st-track-bars i:nth-child(2) { animation-delay: 0.3s; }
.st-track-bars i:nth-child(3) { animation-delay: 0.6s; }

@keyframes st-bars {
  0%, 100% { height: 30%; }
  50% { height: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .st-track-bars i { animation: none; height: 60%; }
}

.st-track-title {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 15px;
  color: var(--t-text);
}

.st-track-title .t-brand {
  font-size: 13px;
}

.st-track.is-current .st-track-title {
  color: #ffffff;
}

.st-track-dur {
  min-width: 44px;
  text-align: right;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
}

.st-track-dl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-right: 4px;
  color: var(--t-text-faint);
  transition: color 0.18s ease;
}

.st-track-dl:hover,
.st-track-dl:focus-visible {
  color: var(--t-red-bright);
}

.st-empty {
  padding: 40px 28px;
  text-align: center;
  color: var(--t-text-muted);
  line-height: 1.7;
}

.st-empty p { margin: 0; }
.st-empty a { color: var(--t-red-bright); }

/* ── Иконки play/pause у кнопки альбома ── */

.st-album-play .st-ico--pause { display: none; }
.st-album.is-playing .st-album-play .st-ico--play { display: none; }
.st-album.is-playing .st-album-play .st-ico--pause { display: block; }

/* ── Адаптив ── */

@media (max-width: 768px) {
  .st-page { padding: 0 16px 60px; }
  .st-hero { padding: 40px 0 28px; }
  .st-hero-link { display: none; }

  .st-album { padding: 18px 16px 8px; }

  .st-album-head {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .st-cover {
    width: 140px;
    aspect-ratio: 1 / 1;
  }

  .st-cover-brand { font-size: 38px; }

  .st-album-play { width: 100%; }

  .st-track {
    grid-template-columns: 48px 1fr auto;
    gap: 10px;
  }

  .st-track-btn { width: 48px; }
  .st-track-dl { display: none; }
}

@media (max-width: 480px) {
  /* Исполнитель один на весь альбом — на узком экране место нужнее названию */
  .st-track-artist { display: none; }
}