/* ==========================================================================
   EXO — ekran wejścia i panel dźwięku (js/audio.js)
   Spis: 1 ekran wejścia · 2 przycisk z equalizerem · 3 panel · 4 suwaki
   ========================================================================== */

/* ---------- 1. Ekran wejścia ---------- */
html.is-gated,
html.is-gated body {
  overflow: hidden;
}
.gate {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: var(--gutter);
  background:
    radial-gradient(60% 50% at 50% 46%, rgba(56, 118, 220, 0.22), transparent 70%),
    radial-gradient(30% 24% at 50% 46%, rgba(246, 169, 69, 0.1), transparent 70%),
    var(--void);
  text-align: center;
  transition: opacity 900ms var(--ease-out), visibility 0s linear 900ms;
}
/* pierścień orbity za logo */
.gate::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 46%;
  width: min(86vw, 760px);
  aspect-ratio: 1 / 0.36;
  border: 1px solid var(--holo-dim);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(-12deg);
  box-shadow: 0 0 40px -10px rgba(127, 211, 255, 0.5), inset 0 0 40px -10px rgba(127, 211, 255, 0.4);
  opacity: 0.55;
  animation: gate-orbit 2.4s var(--ease-out) both;
}
.gate.is-leaving {
  opacity: 0;
  visibility: hidden;
}
.gate.is-leaving .gate__inner {
  transform: scale(1.08);
  filter: blur(6px);
}
.gate__inner {
  position: relative;
  display: grid;
  justify-items: center;
  gap: var(--space-4);
  max-width: 520px;
  transition: transform 900ms var(--ease-out), filter 900ms var(--ease-out);
}
.gate__kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--holo);
  animation: gate-in 1s var(--ease-out) 0.2s both;
}
.gate__logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(5rem, 3rem + 10vw, 10rem);
  line-height: 0.85;
  letter-spacing: -0.03em;
  background: linear-gradient(180deg, #ffffff 0%, #e0eeff 48%, #9cc7f2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 18px rgba(127, 211, 255, 0.5)) drop-shadow(0 0 60px rgba(80, 160, 255, 0.35));
  animation: gate-logo 1.6s var(--ease-out) both;
}
.gate__tag {
  font-size: var(--fs-md);
  color: var(--fg-muted);
  animation: gate-in 1s var(--ease-out) 0.5s both;
}
.gate__actions {
  display: grid;
  justify-items: center;
  gap: var(--space-3);
  margin-top: var(--space-5);
  animation: gate-in 1s var(--ease-out) 0.8s both;
}
.gate__actions .btn--primary {
  min-width: 220px;
  justify-content: center;
}
.gate__mute {
  padding: var(--space-2) var(--space-3);
  border: 0;
  background: none;
  font-size: var(--fs-sm);
  color: var(--fg-faint);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--line-strong);
  transition: color var(--dur);
}
.gate__mute:hover {
  color: var(--fg);
}
.gate__hint {
  max-width: 34ch;
  font-size: var(--fs-xs);
  color: var(--fg-faint);
  animation: gate-in 1s var(--ease-out) 1.1s both;
}
@keyframes gate-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
}
@keyframes gate-logo {
  from {
    opacity: 0;
    letter-spacing: 0.25em;
    filter: blur(12px);
  }
}
@keyframes gate-orbit {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-12deg) scale(0.6);
  }
}

/* ---------- 2. Przycisk dźwięku z equalizerem ---------- */
.sound,
.sound__btn {
  position: relative;
}
.eq {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 14px;
}
.eq i {
  width: 2px;
  height: 4px;
  border-radius: 1px;
  background: currentColor;
  transition: height var(--dur);
}
.eq i:nth-child(2) {
  height: 7px;
}
.eq i:nth-child(3) {
  height: 5px;
}
.sound__btn.is-playing {
  color: var(--holo);
  border-color: var(--holo-dim);
}
.sound__btn.is-playing .eq i {
  animation: eq 900ms ease-in-out infinite alternate;
}
.sound__btn.is-playing .eq i:nth-child(2) {
  animation-duration: 640ms;
  animation-delay: -200ms;
}
.sound__btn.is-playing .eq i:nth-child(3) {
  animation-duration: 1100ms;
  animation-delay: -400ms;
}
.sound__btn.is-playing .eq i:nth-child(4) {
  animation-duration: 760ms;
  animation-delay: -100ms;
}
/* wyciszone: płaska linia z przekreśleniem */
.sound__btn.is-muted .eq i {
  height: 2px;
}
.sound__btn.is-muted::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 1.5px;
  background: currentColor;
  transform: rotate(-40deg);
}
@keyframes eq {
  from {
    height: 3px;
  }
  to {
    height: 14px;
  }
}

/* ---------- 3. Panel ---------- */
.sound__panel {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  z-index: 50;
  display: grid;
  gap: var(--space-3);
  width: 300px;
  padding: var(--space-4);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--glass-hi), transparent 45%), rgba(9, 15, 30, 0.92);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-deep), var(--glow-holo);
  animation: rise 220ms var(--ease-out) both;
}
.sound__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--holo);
}
.sound__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "btn meta"
    "btn range";
  align-items: center;
  column-gap: var(--space-3);
  row-gap: var(--space-1);
}
.sound__toggle {
  grid-area: btn;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface-2);
  color: var(--fg-muted);
  transition: color var(--dur), background var(--dur), border-color var(--dur), box-shadow var(--dur);
}
.sound__toggle:hover {
  color: var(--fg);
  border-color: var(--holo-dim);
}
.sound__toggle[aria-pressed="true"] {
  color: var(--accent-ink);
  border-color: transparent;
  background: linear-gradient(180deg, #ffc06a, var(--accent) 55%, #ea9228);
  box-shadow: var(--glow-accent);
}
.sound__toggle:disabled {
  opacity: 0.4;
  cursor: default;
}
.sound__toggle .i-pause,
.sound__toggle[aria-pressed="true"] .i-play,
.sound__toggle .i-off,
.sound__toggle[aria-pressed="false"] .i-on {
  display: none;
}
.sound__toggle[aria-pressed="true"] .i-pause,
.sound__toggle[aria-pressed="false"] .i-off {
  display: block;
}
.sound__meta {
  grid-area: meta;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  min-width: 0;
}
.sound__label {
  font-size: var(--fs-sm);
  font-weight: 500;
}
.sound__note {
  overflow: hidden;
  font-size: var(--fs-2xs);
  color: var(--fg-faint);
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sound__mute {
  margin-top: var(--space-1);
  padding: 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  font-size: var(--fs-sm);
  color: var(--fg-muted);
  transition: color var(--dur), border-color var(--dur);
}
.sound__mute:hover {
  color: var(--fg);
  border-color: var(--line-strong);
}

/* ---------- 4. Suwaki głośności ---------- */
.range {
  grid-area: range;
  width: 100%;
  height: 18px;
  margin: 0;
  background: transparent;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}
.range::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--holo) var(--v, 50%), rgba(158, 171, 195, 0.22) var(--v, 50%));
}
.range::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--holo) var(--v, 50%), rgba(158, 171, 195, 0.22) var(--v, 50%));
}
.range::-webkit-slider-thumb {
  width: 14px;
  height: 14px;
  margin-top: -5px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(127, 211, 255, 0.25), 0 0 12px var(--holo-dim);
  -webkit-appearance: none;
  appearance: none;
}
.range::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border: 0;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(127, 211, 255, 0.25), 0 0 12px var(--holo-dim);
}
.range:disabled {
  opacity: 0.35;
  cursor: default;
}

@media (max-width: 560px) {
  .sound__panel {
    position: fixed;
    left: var(--gutter);
    right: var(--gutter);
    top: calc(env(safe-area-inset-top, 0px) + 70px);
    width: auto;
  }
}