:root {
  --bg: #e6e9ef;
  --text: #3d4555;
  --mute: #5f687a;
  --accent: #3f5fc7;
  --light: #ffffff;
  --dark: #b8becc;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Nunito", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  background-image: radial-gradient(circle at 20% 10%, #eef1f6 0%, var(--bg) 55%);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem clamp(1.25rem, 4vw, 3rem);
  font-size: 0.85rem;
  color: var(--mute);
  font-weight: 700;
}

.pill {
  text-decoration: none;
  color: var(--text);
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: var(--bg);
  box-shadow:
    6px 6px 14px var(--dark),
    -6px -6px 14px var(--light);
  transition: box-shadow 0.2s ease;
}

.pill:hover {
  box-shadow:
    inset 4px 4px 10px var(--dark),
    inset -4px -4px 10px var(--light);
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 0.5rem clamp(1.25rem, 4vw, 3rem) 4rem;
}

.surface {
  background: var(--bg);
  border-radius: 32px;
  box-shadow:
    14px 14px 28px var(--dark),
    -14px -14px 28px var(--light);
  animation: lift 0.9s ease both;
}

.hero {
  padding: clamp(2rem, 5vw, 3rem);
  margin-bottom: 2rem;
}

.brand {
  font-weight: 800;
  font-size: clamp(3.2rem, 11vw, 5.5rem);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  line-height: 1.25;
  max-width: 16ch;
  margin-bottom: 0.85rem;
}

.sub {
  color: var(--mute);
  line-height: 1.55;
  max-width: 36ch;
  margin-bottom: 1.75rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  font-family: inherit;
  font-weight: 700;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  padding: 0.9rem 1.35rem;
  border-radius: 999px;
  color: var(--text);
  background: var(--bg);
  text-decoration: none;
  display: inline-block;
}

.raised {
  box-shadow:
    8px 8px 16px var(--dark),
    -8px -8px 16px var(--light);
  transition: transform 0.2s ease;
}

.raised:hover {
  transform: translateY(-2px);
}

.pressed {
  color: var(--accent);
  box-shadow:
    inset 6px 6px 12px var(--dark),
    inset -6px -6px 12px var(--light);
}

.player {
  padding: 2rem;
  display: grid;
  gap: 1.25rem;
  justify-items: center;
  text-align: center;
  animation-delay: 0.15s;
}

.disc {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, var(--bg) 18%, transparent 19%),
    conic-gradient(from 0deg, #c5cad6, #f4f6fa, #9aa3b5, #e8ebf2, #c5cad6);
  box-shadow:
    10px 10px 20px var(--dark),
    -10px -10px 20px var(--light);
  animation: spin 12s linear infinite;
}

.meta h2 {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.meta p {
  color: var(--mute);
  font-size: 0.9rem;
}

.controls {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.player-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.knob {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  box-shadow:
    7px 7px 14px var(--dark),
    -7px -7px 14px var(--light);
  transition: box-shadow 0.15s ease;
}

.play:hover {
  box-shadow:
    inset 5px 5px 10px var(--dark),
    inset -5px -5px 10px var(--light);
}

.play {
  width: 68px;
  height: 68px;
  color: var(--accent);
  font-size: 1.1rem;
  cursor: pointer;
}

.play::before {
  content: "▶";
}

.player-toggle:checked + .controls .play::before {
  content: "Ⅱ";
}

.player-toggle:focus-visible + .controls .play {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.bar {
  width: 100%;
  height: 14px;
  border-radius: 999px;
  background: var(--bg);
  box-shadow:
    inset 4px 4px 8px var(--dark),
    inset -4px -4px 8px var(--light);
  overflow: hidden;
}

.bar span {
  display: block;
  height: 100%;
  width: 42%;
  border-radius: 999px;
  background: linear-gradient(90deg, #7b93ff, var(--accent));
  box-shadow: 2px 0 8px rgba(91, 124, 250, 0.4);
  animation: progress 3s ease-in-out infinite alternate;
}

@keyframes lift {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes progress {
  from { width: 28%; }
  to { width: 68%; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}