/* D-Z — Ne není ne
   Paleta odvozená z coveru: studená modrošedá obloha, antracitový interiér auta,
   teplý zlatavo-béžový akcent z typografie na obalu.
   Stránka je záměrně dark-only — cover je tmavá cinematic fotka a light mode
   by ji rozbil. Viz PROJECT.md. */

:root {
  --ink:        #08131b;
  --ink-lift:   #18303d;
  --steel:      #8695a2;
  --steel-soft: #5d6a76;
  --paper:      #dbe3ea;
  --gold:       #e0be8b;
  --gold-dim:   rgba(224, 190, 139, 0.34);
  --hairline:   rgba(226, 237, 243, 0.18);
  --hairline-2: rgba(197, 211, 221, 0.18);

  --track-w: 0.34em;
  --track-xw: 0.42em;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue",
          "Segoe UI", Roboto, system-ui, sans-serif;
}

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

/* Atribut [hidden] prohrává specificitou s každým .trida { display: ... } níž.
   Bez tohohle prosvítá skrytý fallback coveru i sbalený text. */
[hidden] { display: none !important; }

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

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font);
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Ambientní pozadí: rozostřený cover, aby stránka nesála na plochém černém
   podkladu. Fixed + pointer-events:none, takže se nepřekresluje při scrollu. */
.ambient {
  position: fixed;
  inset: -12vmax;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.ambient img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(58px) saturate(0.72);
  opacity: 0;
  transform: scale(1.13);
  transition: opacity 2.4s var(--ease);
}

.ambient img.is-ready { opacity: 0.34; }

/* Dvě barevné záře nad rozostřeným coverem: studená modrošedá z oblohy vlevo nahoře,
   teplá zlatá z typografie vpravo dole. Bez nich je pozadí ploché. */
.ambient::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 17% 12%, rgba(155, 185, 201, 0.18), transparent 34%),
    radial-gradient(circle at 82% 78%, rgba(213, 158, 91, 0.11), transparent 30%),
    linear-gradient(132deg, rgba(6, 17, 24, 0.89), rgba(12, 29, 40, 0.80));
}

/* ---------- Layout ---------- */

.stage {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  align-items: start;
  /* Záměrně NE align-content: center — jakmile rozbalený text přeroste výšku okna,
     centrování se vypne a celá stránka poskočí nahoru. Zarovnání nahoru je stabilní
     a horní odsazení dělá stejný optický klid. */
  align-content: start;
  gap: clamp(3rem, 6vw, 7rem);
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(3rem, 12vh, 9rem) clamp(1.5rem, 5vw, 5rem) clamp(4rem, 10vh, 8rem);
}

/* ---------- Cover ---------- */

.art {
  margin: 0;
  position: sticky;
  top: clamp(2rem, 8vh, 5rem);
  opacity: 0;
  transform: translateY(14px);
  animation: rise 1.5s var(--ease) 0.15s forwards;
}

.art-frame {
  position: relative;
  z-index: 1;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  background: var(--ink-lift);
  overflow: hidden;
  box-shadow:
    0 42px 100px rgba(0, 0, 0, 0.45),
    0 4px 18px rgba(0, 0, 0, 0.28);
}

/* Pomalý světelný přejezd přes obal — jediný nekonečný pohyb na stránce. */
.art-glint {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 24%, rgba(255, 255, 255, 0.06) 48%, transparent 66%);
  opacity: 0;
  animation: glint 7s ease-in-out 2s infinite;
}

.art-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.6s var(--ease);
}

.art-frame img.is-ready { opacity: 1; }

/* ---------- Vinyl ----------
   Deska sedí za obalem. V klidu jen vykukuje, při přehrávání vyjede a točí se.
   Slide řeší vlastnost `translate`, rotaci `rotate` — jsou nezávislé, takže si
   transition a animace nepřepisují jedna druhou. */

.vinyl {
  position: absolute;
  z-index: 0;
  top: 50%;
  right: 0;
  width: 76%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  translate: -1% -50%;
  rotate: 0deg;
  box-shadow:
    0 30px 70px rgba(0, 0, 0, 0.5),
    inset 0 0 0 1px rgba(226, 237, 243, 0.07);
  background:
    radial-gradient(circle at 50% 50%, var(--ink) 0 1.4%, transparent 1.6%),
    radial-gradient(circle at 50% 50%, rgba(224, 190, 139, 0.9) 0 13%, rgba(224, 190, 139, 0) 13.4%),
    /* hladká náběhová hrana, jako má skutečná deska */
    radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0) 0 95.5%, rgba(226, 237, 243, 0.13) 96% 97.5%, rgba(0, 0, 0, 0) 98%),
    /* lesk, který se otáčí s deskou — hlavní vodítko, že hraje */
    conic-gradient(
      from 0deg,
      rgba(255, 255, 255, 0.13),
      rgba(255, 255, 255, 0) 20%,
      rgba(255, 255, 255, 0.09) 47%,
      rgba(255, 255, 255, 0) 70%,
      rgba(255, 255, 255, 0.13)
    ),
    repeating-radial-gradient(
      circle at 50% 50%,
      rgba(214, 228, 238, 0.085) 0 1px,
      rgba(0, 0, 0, 0) 1px 6px
    ),
    radial-gradient(circle at 50% 50%, #202932 0 62%, #0d151c 100%);
  transition: translate 1.4s var(--ease);
  animation: spin 4.2s linear infinite;
  animation-play-state: paused;
}

body.is-playing .vinyl {
  translate: 11% -50%;
  animation-play-state: running;
}

.art-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.1rem;
  padding: clamp(1.5rem, 5%, 3rem);
  background:
    linear-gradient(155deg, #1b232b, #0f1419 70%);
}

.art-fallback-artist {
  font-size: 0.6rem;
  letter-spacing: var(--track-xw);
  text-transform: uppercase;
  color: var(--steel);
}

.art-fallback-title {
  font-size: clamp(0.85rem, 2vw, 1.15rem);
  letter-spacing: var(--track-w);
  text-transform: uppercase;
  color: var(--gold);
}

.art-fallback-note {
  margin-top: auto;
  font-size: 0.6rem;
  letter-spacing: var(--track-w);
  text-transform: uppercase;
  color: var(--steel-soft);
}

/* ---------- Panel ---------- */

.panel {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: clamp(2.5rem, 5vh, 4rem);
  min-width: 0;
}

.titles {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 1.5s var(--ease) 0.35s forwards;
}

.artist {
  margin: 0 0 1.4rem;
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: var(--track-xw);
  text-transform: uppercase;
  color: var(--steel);
}

.title {
  margin: 0;
  font-size: clamp(1.15rem, 2.9vw, 1.9rem);
  font-weight: 300;
  line-height: 1.5;
  letter-spacing: var(--track-w);
  text-transform: uppercase;
  color: var(--gold);
}

/* ---------- Přehrávač ---------- */

.player {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 1.5s var(--ease) 0.55s forwards;
}

.transport {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.play {
  flex: none;
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold-dim);
  border-radius: 50%;
  background: rgba(224, 190, 139, 0.04);
  color: var(--gold);
  cursor: pointer;
  padding: 0;
  transition:
    border-color 0.5s var(--ease),
    background-color 0.5s var(--ease),
    transform 0.4s var(--ease),
    opacity 0.5s var(--ease);
}

.play:hover:not(:disabled) {
  border-color: var(--gold);
  background: rgba(224, 190, 139, 0.09);
}

.play:active:not(:disabled) { transform: scale(0.97); }

.play:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 4px;
}

.play:disabled {
  opacity: 0.32;
  cursor: default;
}

.glyph {
  width: 24px;
  height: 24px;
  fill: currentColor;
  grid-area: 1 / 1;
  transition: opacity 0.3s var(--ease);
}

.glyph-pause { opacity: 0; }

.player.is-playing .glyph-play  { opacity: 0; }
.player.is-playing .glyph-pause { opacity: 1; }

.track {
  flex: 1;
  min-width: 0;
}

/* Range input — nativní kvůli klávesnici, dotyku a ARIA zdarma. */
.seek {
  --progress: 0%;
  width: 100%;
  display: block;
  margin: 0;
  height: 24px;
  background: transparent;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

.seek:disabled { cursor: default; opacity: 0.4; }

.seek::-webkit-slider-runnable-track {
  height: 2px;
  border-radius: 1px;
  background: linear-gradient(
    to right,
    var(--gold) 0 var(--progress),
    var(--hairline-2) var(--progress) 100%
  );
}

.seek::-moz-range-track {
  height: 2px;
  border-radius: 1px;
  background: linear-gradient(
    to right,
    var(--gold) 0 var(--progress),
    var(--hairline-2) var(--progress) 100%
  );
}

.seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 11px;
  height: 11px;
  margin-top: -4.5px;
  border: 0;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}

.seek::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border: 0;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}

.seek:hover:not(:disabled)::-webkit-slider-thumb,
.seek:focus-visible::-webkit-slider-thumb,
.seek:active::-webkit-slider-thumb { opacity: 1; }

.seek:hover:not(:disabled)::-moz-range-thumb,
.seek:focus-visible::-moz-range-thumb,
.seek:active::-moz-range-thumb { opacity: 1; }

.seek:focus-visible {
  outline: 1px solid var(--gold-dim);
  outline-offset: 6px;
  border-radius: 2px;
}

.times {
  display: flex;
  justify-content: space-between;
  margin-top: 0.7rem;
}

.time {
  font-size: 0.6rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--track-w);
  color: var(--steel-soft);
}

.player-note {
  margin: 1.6rem 0 0;
  font-size: 0.6rem;
  letter-spacing: var(--track-w);
  text-transform: uppercase;
  color: var(--steel-soft);
  min-height: 1em;
  transition: color 0.4s var(--ease);
}

.player[data-state="ready"] .player-note,
.player[data-state="playing"] .player-note { visibility: hidden; }

.player[data-state="missing"] .player-note,
.player[data-state="error"] .player-note { color: var(--steel); }

/* ---------- Text ---------- */

.lyrics-block {
  border-top: 1px solid var(--hairline);
  padding-top: clamp(1.5rem, 3vh, 2.25rem);
  opacity: 0;
  transform: translateY(14px);
  animation: rise 1.5s var(--ease) 0.75s forwards;
}

.lyrics-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.35rem 0;
  border: 0;
  background: none;
  color: var(--steel);
  font-family: inherit;
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: var(--track-xw);
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.45s var(--ease);
}

.lyrics-toggle:hover,
.lyrics-toggle[aria-expanded="true"] { color: var(--gold); }

.lyrics-toggle:focus-visible {
  outline: 1px solid var(--gold-dim);
  outline-offset: 6px;
}

.chevron {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.55s var(--ease);
}

.lyrics-toggle[aria-expanded="true"] .chevron { transform: rotate(180deg); }

.lyrics {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  margin-top: 2.25rem;
  max-width: 46ch;
  animation: fade 0.9s var(--ease) both;
}

.verse p:last-child {
  margin: 0;
  font-size: 0.95rem;
  line-height: 2;
  color: rgba(219, 227, 234, 0.78);
}

.verse-hook p:last-child { color: var(--paper); }

.tag {
  margin: 0 0 0.9rem;
  font-size: 0.55rem;
  font-weight: 400;
  letter-spacing: var(--track-xw);
  text-transform: uppercase;
  color: var(--gold-dim);
}

/* ---------- Pohyb ---------- */

@keyframes rise {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ---------- Živý text (karaoke) ----------
   Okno pěti řádků: dva odjeté, aktivní, dva nadcházející. Hloubka ostrosti —
   aktivní řádek je ostrý, čím dál od něj, tím rozostřenější. Překresluje se jen
   při přepnutí indexu, ne každý snímek. */

.live {
  --live-line: 2.6rem;
  height: calc(var(--live-line) * 5);
  overflow: hidden;
  margin-top: -1.75rem;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 30% 70%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 30% 70%, transparent);
}

.live-list {
  list-style: none;
  margin: 0;
  padding: 0;
  transition: translate 0.7s cubic-bezier(0.22, 1, 0.28, 1);
  will-change: translate;
}

.live-list li {
  height: var(--live-line);
  display: flex;
  align-items: center;
  font-size: 0.95rem;
  line-height: 1.3;
  color: rgba(219, 227, 234, 0.55);
  opacity: 0.26;
  filter: blur(1.5px);
  scale: 0.985;
  transform-origin: left center;
  transition:
    color 0.6s var(--ease),
    opacity 0.6s var(--ease),
    filter 0.6s var(--ease),
    scale 0.6s cubic-bezier(0.22, 1, 0.28, 1);
}

/* sousedé aktivního řádku — mezistupeň, aby přechod nebyl skokový */
.live-list li.is-near {
  opacity: 0.5;
  filter: blur(0.6px);
}

.live-list li.is-active {
  color: var(--gold);
  opacity: 1;
  filter: blur(0);
  scale: 1.035;
  animation: lineIn 0.6s cubic-bezier(0.22, 1, 0.28, 1);
}

.live-list li.is-past {
  opacity: 0.14;
  filter: blur(2.2px);
}

.live-list li.is-section {
  font-size: 0.55rem;
  letter-spacing: var(--track-xw);
  text-transform: uppercase;
  color: var(--gold-dim);
}

.live-list li.is-section.is-active {
  color: var(--gold);
  scale: 1;
}

@keyframes lineIn {
  from { translate: -6px 0; }
  to   { translate: 0 0; }
}

@keyframes spin {
  to { rotate: 360deg; }
}

@keyframes glint {
  0%, 18%   { transform: translateX(-52%); opacity: 0; }
  45%       { opacity: 1; }
  72%, 100% { transform: translateX(54%); opacity: 0; }
}

/* ---------- Mobil ---------- */

@media (max-width: 900px) {
  .stage {
    grid-template-columns: 1fr;
    align-items: start;
    gap: clamp(2.5rem, 7vh, 3.5rem);
    padding: clamp(2rem, 5vh, 3rem) 1.5rem clamp(3rem, 8vh, 5rem);
  }

  .art {
    position: static;
    justify-self: center;
    width: 100%;
    max-width: 460px;
  }

  .vinyl { width: 68%; }
  body.is-playing .vinyl { translate: 14% -50%; }

  .panel { gap: 2.5rem; }

  .play { width: 62px; height: 62px; }

  .seek { height: 32px; }

  .seek::-webkit-slider-thumb { opacity: 1; }
  .seek::-moz-range-thumb      { opacity: 1; }

  .lyrics { max-width: none; }
}

/* ---------- Přístupnost ---------- */

@media (prefers-reduced-motion: reduce) {
  .art, .titles, .player, .lyrics-block {
    animation: none;
    opacity: 1;
    transform: none;
  }
  .lyrics { animation: none; }
  .art-glint { animation: none; opacity: 0; }
  .live-list { transition: none; }
  .live-list li { animation: none; transition: none; filter: none; scale: 1; }
  .vinyl { animation: none; transition: none; }
  .ambient img,
  .art-frame img { transition: none; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}