/* ==========================================================================
   СФЕРАДИО — дизайн-токены
   Направление: тёмная редакционная сцена, орбитальный мотив (сфера + радио)
   ========================================================================== */
:root {
  --bg:            oklch(12% 0.012 285);
  --bg-deep:       oklch(8%  0.010 285);
  --surface:       oklch(17% 0.014 285);
  --line:          oklch(28% 0.014 285);

  --text:          oklch(96% 0.005 285);
  --text-dim:      oklch(72% 0.010 285);
  --text-faint:    oklch(52% 0.012 285);

  --accent:        oklch(78% 0.165 62);   /* тёплый янтарь — «в эфире» */
  --accent-soft:   oklch(78% 0.165 62 / 0.14);
  --live:          oklch(72% 0.185 145);

  --text-hero:     clamp(2rem, 1.1rem + 4.2vw, 4.25rem);
  --text-sub:      clamp(1rem, 0.9rem + 0.55vw, 1.35rem);

  --space-block:   clamp(2.5rem, 1.8rem + 3.2vw, 5.5rem);
  --orbit:         clamp(13rem, 10rem + 16vw, 17.5rem);

  --dur-fast:      160ms;
  --dur:           320ms;
  --dur-slow:      680ms;
  --ease:          cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  background: var(--bg-deep);
  color: var(--text);
  font-family: "Inter Tight", "Inter", -apple-system, BlinkMacSystemFont,
               "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-synthesis-weight: none;
  letter-spacing: -0.011em;
  overflow-x: hidden;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap;
}

/* --- Фон: фотография ---------------------------------------------------
   Файл кладётся в /var/www/sferadio/backdrop.webp (или .jpg — поправить URL).
   Если файла нет, слой просто невидим и вёрстка не ломается.
   Скрим обязателен: без него текст на фотографии нечитаем.                */
.backdrop {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    /* Скрим: морда кота читается вверху, низ уходит в чёрное под текст */
    linear-gradient(to bottom,
      oklch(8% 0.010 285 / 0.55) 0%,
      oklch(8% 0.010 285 / 0.60) 30%,
      oklch(8% 0.010 285 / 0.88) 62%,
      oklch(8% 0.010 285 / 0.98) 82%,
      oklch(8% 0.010 285) 100%),
    image-set(url("/backdrop.webp") type("image/webp"),
              url("/backdrop.jpg")  type("image/jpeg"));
  background-size: cover, cover;
  background-position: center top, center top;
  background-repeat: no-repeat;
  filter: saturate(0.8);
  opacity: 0;
  animation: backdrop-in 1.6s var(--ease) 0.2s forwards;
}
@keyframes backdrop-in { to { opacity: 1; } }

/* Мобильный: лёгкий файл (48 КБ), кадр смещён к морде, скрим плотнее —
   на узком экране кот кадрируется крупно и спорит с заголовком */
@media (max-width: 48rem) {
  .backdrop {
    background-image:
      linear-gradient(to bottom,
        oklch(8% 0.010 285 / 0.62) 0%,
        oklch(8% 0.010 285 / 0.74) 26%,
        oklch(8% 0.010 285 / 0.94) 54%,
        oklch(8% 0.010 285) 76%),
      url("/backdrop-mobile.webp");
    background-position: center top, center 4%;
    filter: saturate(0.7);
  }
}

/* --- Атмосфера: зерно и свечение ------------------------------------- */
.grain {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  opacity: 0.4; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}
.glow {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(52rem 34rem at 50% -6%, oklch(30% 0.05 62 / 0.5), transparent 62%),
    radial-gradient(38rem 30rem at 88% 108%, oklch(26% 0.05 285 / 0.55), transparent 66%),
    var(--bg);
  transition: background var(--dur-slow) var(--ease);
}
body[data-playing="true"] .glow {
  background:
    radial-gradient(56rem 38rem at 50% -4%, oklch(38% 0.085 62 / 0.62), transparent 64%),
    radial-gradient(38rem 30rem at 88% 108%, oklch(28% 0.06 285 / 0.6), transparent 66%),
    var(--bg);
}

main, .masthead, .foot { position: relative; z-index: 1; }

/* --- Шапка ------------------------------------------------------------ */
.masthead {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding: clamp(1.1rem, 0.8rem + 1vw, 2rem) clamp(1.1rem, 0.6rem + 2.4vw, 3.5rem);
}
.wordmark {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: 0.94rem; font-weight: 650;
  letter-spacing: 0.19em;
  color: var(--text); text-decoration: none;
}
.wordmark__dot {
  width: 0.62rem; height: 0.62rem; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0.28rem var(--accent-soft);
}

.status {
  margin: 0;
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.68rem; font-weight: 560;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--text-faint);
}
.status__pulse {
  width: 0.42rem; height: 0.42rem; border-radius: 50%;
  background: currentColor;
}
.status[data-state="live"]     { color: var(--live); }
.status[data-state="loading"]  { color: var(--accent); }
.status[data-state="live"] .status__pulse { animation: pulse 2s var(--ease) infinite; }
@keyframes pulse {
  0%, 100% { opacity: 1;   transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(0.72); }
}

/* --- Сцена ------------------------------------------------------------ */
.stage {
  flex: 1;
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
  padding: clamp(0.5rem, 2vw, 2rem) 1.25rem 0;
}

.orbit {
  position: relative;
  width: var(--orbit); height: var(--orbit);
  display: grid; place-items: center;
  margin-bottom: clamp(1.75rem, 1.2rem + 2vw, 3rem);
}
.orbit__ring {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  transform: rotate(-90deg);
  overflow: visible;
}
.orbit__track,
.orbit__progress {
  fill: none; stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}
.orbit__track { stroke: var(--line); }
.orbit__progress {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 703.7;
  stroke-dashoffset: 703.7;
  transition: stroke-dashoffset 1s linear;
  filter: drop-shadow(0 0 6px oklch(78% 0.165 62 / 0.55));
}

.cover {
  position: absolute; inset: 8%;
  margin: 0; border-radius: 50%;
  background-size: cover; background-position: center;
  opacity: 0; transform: scale(0.94);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
.cover[data-has-art="true"] { opacity: 0.3; transform: scale(1); }

/* Кнопка Play — главный элемент экрана */
.play {
  position: relative;
  width: 46%; aspect-ratio: 1; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--surface), var(--bg));
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 1.4rem 3.5rem oklch(0% 0 0 / 0.55),
              inset 0 1px 0 oklch(100% 0 0 / 0.06);
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.play:hover  { transform: scale(1.045); border-color: var(--accent); }
.play:active { transform: scale(0.975); }
.play:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 6px;
}
body[data-playing="true"] .play {
  border-color: var(--accent);
  box-shadow: 0 1.4rem 3.5rem oklch(0% 0 0 / 0.55),
              0 0 3.5rem var(--accent-soft),
              inset 0 1px 0 oklch(100% 0 0 / 0.06);
}

.play__icon {
  width: 38%; height: 38%; fill: currentColor;
  grid-area: 1 / 1;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.play__icon--play  { transform: translateX(4%); }
.play__icon--pause { opacity: 0; transform: scale(0.8); }
body[data-playing="true"] .play__icon--play  { opacity: 0; transform: scale(0.8); }
body[data-playing="true"] .play__icon--pause { opacity: 1; transform: scale(1); }

.play__spinner {
  grid-area: 1 / 1;
  width: 44%; aspect-ratio: 1; border-radius: 50%;
  border: 2px solid transparent; border-top-color: var(--accent);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease);
}
body[data-loading="true"] .play__spinner { opacity: 1; animation: spin 0.75s linear infinite; }
body[data-loading="true"] .play__icon    { opacity: 0; }
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Метаданные трека -------------------------------------------------- */
.badge {
  margin: 0 0 0.85rem;
  display: inline-block;
  padding: 0.3rem 0.72rem;
  border: 1px solid var(--accent);
  border-radius: 100px;
  font-size: 0.63rem; font-weight: 640;
  letter-spacing: 0.17em; text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
}
.badge[hidden] { display: none; }

.np-artist {
  margin: 0;
  font-size: var(--text-hero);
  font-weight: 620;
  line-height: 0.98;
  letter-spacing: -0.035em;
  text-wrap: balance;
}
.np-title {
  margin: 0.65rem 0 0;
  font-size: var(--text-sub);
  color: var(--text-dim);
  text-wrap: balance;
}

.meter {
  width: min(24rem, 74vw);
  height: 2px; margin: clamp(1.6rem, 3vw, 2.4rem) 0 0;
  background: var(--line); border-radius: 2px; overflow: hidden;
}
.meter__fill {
  display: block; height: 100%; width: 0;
  background: var(--accent);
  transition: width 1s linear;
}

/* --- Действия ---------------------------------------------------------- */
.actions {
  display: flex; flex-wrap: wrap;
  align-items: center; justify-content: center;
  gap: 1rem 1.75rem;
  padding: var(--space-block) 1.25rem 0;
}

.cta {
  display: inline-flex; align-items: center; gap: 0.62rem;
  padding: 0.85rem 1.6rem;
  border: 1px solid var(--line); border-radius: 100px;
  background: transparent;
  color: var(--text); text-decoration: none;
  font-size: 0.95rem; font-weight: 560;
  transition: border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}
.cta:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-2px);
}
.cta:active { transform: translateY(0); }
.cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.cta__plus {
  font-size: 1.2rem; line-height: 1; color: var(--accent);
  transition: transform var(--dur) var(--ease);
}
.cta:hover .cta__plus { transform: rotate(90deg); }

.volume { display: flex; align-items: center; gap: 0.7rem; color: var(--text-faint); }
.volume__icon { width: 1.15rem; height: 1.15rem; fill: currentColor; }
.volume__wave { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; }

#vol {
  -webkit-appearance: none; appearance: none;
  width: 6.5rem; height: 2px;
  background: var(--line); border-radius: 2px; cursor: pointer;
}
#vol::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 0.8rem; height: 0.8rem; border-radius: 50%;
  background: var(--text); border: none;
  transition: background-color var(--dur-fast) var(--ease);
}
#vol::-moz-range-thumb {
  width: 0.8rem; height: 0.8rem; border-radius: 50%;
  background: var(--text); border: none;
}
#vol:hover::-webkit-slider-thumb { background: var(--accent); }
#vol:hover::-moz-range-thumb     { background: var(--accent); }

/* --- История ----------------------------------------------------------- */
.history {
  width: min(38rem, 90vw);
  margin: var(--space-block) auto 0;
  padding: 0 1.25rem;
}
.history__heading {
  margin: 0 0 1.1rem;
  font-size: 0.68rem; font-weight: 600;
  letter-spacing: 0.19em; text-transform: uppercase;
  color: var(--text-faint);
}
.history__list { margin: 0; padding: 0; list-style: none; }
.history__list li {
  display: flex; align-items: baseline; gap: 0.8rem;
  padding: 0.72rem 0;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
  animation: rise var(--dur) var(--ease) backwards;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(5px); }
}
.history__list li b { font-weight: 560; }
.history__list li span { color: var(--text-faint); }
.history__list li time {
  margin-left: auto; flex-shrink: 0;
  font-size: 0.76rem; color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}
.history__empty { color: var(--text-faint); font-size: 0.9rem; }

/* --- Подвал ------------------------------------------------------------ */
.foot {
  margin-top: var(--space-block);
  padding: 2rem clamp(1.1rem, 0.6rem + 2.4vw, 3.5rem) 2.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.83rem; color: var(--text-faint);
}
.foot p { margin: 0.28rem 0; }
.foot a { color: var(--text-dim); text-decoration: underline; text-underline-offset: 3px; }
.foot a:hover { color: var(--accent); }

/* --- Доступность: уважаем reduced-motion ------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}