:root {
  --bg: #000000;
  --fg: #f2f2f2;
  --muted: #ffffff;
  --line: #000000;
  --line-soft: #161616;
  --track: #242424;
  --panel: #0b0b0b;
  --panel-edge: #141414;
  --accent: #ffffff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: var(--bg);
  background-image: radial-gradient(120% 80% at 50% -10%, #101010 0%, #050505 45%, #000000 100%);
  color: var(--fg);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-weight: 400;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.stage {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 36px;
  padding: 40px 24px;
}

.player {
  width: min(900px, 100%);
  display: flex;
  flex-direction: column;
  gap: 22px;
  opacity: 0;
  transform: translateY(14px) scale(0.992);
  animation: rise 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}

.screen-wrap {
  position: relative;
  border-radius: 16px;
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.9);
}

.screen {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #030303;
  border-radius: 15px;
  display: block;
  cursor: pointer;
}

.controls {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 18px;
  border-radius: 16px;
  background: linear-gradient(180deg, var(--panel-edge) 0%, var(--panel) 100%);
  border: 1px solid var(--line);
  box-shadow: 0 18px 50px -28px rgba(0, 0, 0, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--fg);
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 10px;
  flex: 0 0 auto;
  transition: background 0.2s ease, transform 0.15s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.btn:hover {
  background: #181818;
}

.btn:active {
  transform: scale(0.9);
}

.btn:focus-visible {
  outline: 1px solid var(--fg);
  outline-offset: 2px;
}

.icon-play,
.icon-pause,
.icon-vol,
.icon-mute {
  display: block;
}

.icon-play {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 7px 0 7px 12px;
  border-color: transparent transparent transparent var(--fg);
  margin-left: 2px;
}

.icon-pause {
  width: 12px;
  height: 14px;
  border-left: 4px solid var(--fg);
  border-right: 4px solid var(--fg);
}

.icon-vol {
  width: 14px;
  height: 14px;
  border: 2px solid var(--fg);
  border-radius: 50%;
}

.icon-mute {
  width: 14px;
  height: 14px;
  border: 2px solid var(--muted);
  border-radius: 50%;
  position: relative;
}

.icon-mute::after {
  content: "";
  position: absolute;
  inset: 50% -3px auto -3px;
  height: 2px;
  background: var(--muted);
  transform: rotate(45deg);
}

.time {
  font-family: "Space Grotesk", "Inter", system-ui, sans-serif;
  font-size: 12.5px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  flex: 0 0 auto;
  min-width: 38px;
  text-align: center;
  letter-spacing: 0.02em;
}

.slider {
  appearance: none;
  -webkit-appearance: none;
  height: 5px;
  background: var(--track);
  border-radius: 999px;
  cursor: pointer;
  outline: none;
  touch-action: none;
  transition: height 0.2s ease;
}

.slider.seek {
  flex: 1 1 auto;
  background: linear-gradient(to right, var(--accent) var(--fill, 0%), var(--track) var(--fill, 0%));
}

.slider.volume {
  flex: 0 0 96px;
  width: 96px;
  background: linear-gradient(to right, var(--accent) var(--fill, 100%), var(--track) var(--fill, 100%));
}

.slider:hover {
  height: 6px;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--fg);
  border: 0;
  cursor: pointer;
  box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.18);
  transition: transform 0.18s cubic-bezier(0.22, 0.61, 0.36, 1), box-shadow 0.25s ease;
}

.slider:hover::-webkit-slider-thumb {
  transform: scale(1.18);
  box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.08);
}

.slider:active::-webkit-slider-thumb {
  transform: scale(1.05);
  box-shadow: 0 0 0 9px rgba(255, 255, 255, 0.12);
}

.slider.volume::-webkit-slider-thumb,
.slider.volume:hover::-webkit-slider-thumb,
.slider.volume:active::-webkit-slider-thumb {
  box-shadow: none;
}

.slider.volume.muted::-webkit-slider-thumb {
  opacity: 0;
}

.slider.volume.muted::-moz-range-thumb {
  opacity: 0;
}

.slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--fg);
  border: 0;
  cursor: pointer;
  transition: transform 0.18s ease;
}

.slider:hover::-moz-range-thumb {
  transform: scale(1.18);
}

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

.link {
  font-family: "Space Grotesk", "Inter", system-ui, sans-serif;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  padding: 6px 4px;
  transition: color 0.25s ease, transform 0.25s ease, opacity 0.25s ease;
}

.link:hover {
  color: var(--fg);
  transform: translateY(-1px);
}

.link:focus-visible {
  outline: 1px solid var(--fg);
  outline-offset: 4px;
  border-radius: 4px;
}

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

@media (max-width: 768px) {
  .stage {
    gap: 28px;
    padding: 28px 16px;
  }

  .player {
    gap: 18px;
  }

  .screen-wrap {
    border-radius: 14px;
  }
}

@media (max-width: 540px) {
  .slider.volume,
  .icon-vol,
  #muteToggle {
    display: none;
  }

  .controls {
    gap: 12px;
    padding: 12px 14px;
  }

  .time {
    font-size: 11.5px;
    min-width: 34px;
  }
}

@media (pointer: coarse) {
  .btn {
    width: 44px;
    height: 44px;
  }

  .slider {
    height: 8px;
  }

  .slider::-webkit-slider-thumb {
    width: 20px;
    height: 20px;
  }

  .slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
  }

  .slider:hover {
    height: 8px;
  }
}

@media (max-height: 480px) and (orientation: landscape) {
  .stage {
    gap: 16px;
    padding: 14px 16px;
  }

  .player {
    width: auto;
  }

  .screen {
    width: auto;
    height: 62vh;
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .player {
    animation: none;
    opacity: 1;
    transform: none;
  }
}