:root {
  --bg-0: #07070c;
  --bg-1: #101018;
  --lime: #c8ff3d;
  --lime-dim: #8fb82a;
  --hot: #ff4d6d;
  --text: #f4f7ef;
  --muted: #9aa39a;
  --shadow: rgba(0, 0, 0, 0.45);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

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

body {
  font-family: "Space Grotesk", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(200, 255, 61, 0.12), transparent 60%),
    radial-gradient(800px 500px at 100% 100%, rgba(255, 77, 109, 0.08), transparent 55%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
  overflow-x: hidden;
}

.noise,
.scanlines {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
}

.noise {
  opacity: 0.08;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.scanlines {
  opacity: 0.06;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(255, 255, 255, 0.08) 3px
  );
}

.page {
  position: relative;
  z-index: 1;
  width: min(960px, 100%);
  margin: 0 auto;
  padding: calc(1.25rem + var(--safe-top)) 1rem calc(1.5rem + var(--safe-bottom));
}

.hero {
  text-align: center;
  margin-bottom: 1.5rem;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--muted);
}

.brand {
  margin: 0.2rem 0 0;
  font-family: "Bangers", system-ui, sans-serif;
  font-size: clamp(3.5rem, 18vw, 7rem);
  line-height: 0.95;
  letter-spacing: 0.04em;
  color: var(--lime);
  text-shadow:
    0 0 18px rgba(200, 255, 61, 0.35),
    4px 4px 0 var(--hot);
  animation: brandPop 700ms cubic-bezier(0.2, 1.1, 0.3, 1) both;
}

.tagline {
  margin: 0.5rem 0 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-bottom: 1rem;
}

.volume {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.volume input {
  width: min(220px, 55vw);
  accent-color: var(--lime);
}

.stop-btn {
  appearance: none;
  border: 2px solid rgba(255, 77, 109, 0.5);
  border-radius: 999px;
  background: rgba(255, 77, 109, 0.12);
  color: var(--text);
  min-height: 44px;
  min-width: 88px;
  padding: 0.55rem 1.1rem;
  font: 600 0.9rem "Space Grotesk", system-ui, sans-serif;
  cursor: pointer;
  touch-action: manipulation;
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    opacity 120ms ease;
}

.stop-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.stop-btn:not(:disabled):hover {
  border-color: var(--hot);
}

.stop-btn:not(:disabled):active {
  transform: scale(0.96);
}

.status {
  margin: 0;
  flex: 1 1 100%;
  font-size: 0.85rem;
  color: var(--lime-dim);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.sound-section + .sound-section {
  margin-top: 1.5rem;
}

.section-title {
  margin: 0 0 0.85rem;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  text-align: center;
}

.sound-btn {
  appearance: none;
  border: 2px solid rgba(200, 255, 61, 0.35);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  color: var(--text);
  min-height: 72px;
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  cursor: pointer;
  touch-action: manipulation;
  box-shadow: 0 10px 24px var(--shadow);
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    background 120ms ease;
  animation: rise 500ms ease both;
}

.sound-section--background .sound-btn {
  border-color: rgba(120, 200, 255, 0.35);
}

.sound-section--background .sound-btn:hover {
  border-color: #78c8ff;
}

.sound-section--background .sound-btn:active,
.sound-section--background .sound-btn.is-playing {
  border-color: #ff9f43;
  background: linear-gradient(180deg, rgba(255, 159, 67, 0.18), rgba(255, 255, 255, 0.03));
}

.grid .sound-btn:nth-child(odd) {
  animation-delay: 80ms;
}

.grid .sound-btn:nth-child(even) {
  animation-delay: 140ms;
}

.sound-btn:hover {
  border-color: var(--lime);
}

.sound-btn:active,
.sound-btn.is-playing {
  transform: scale(0.96);
  border-color: var(--hot);
  background: linear-gradient(180deg, rgba(255, 77, 109, 0.18), rgba(255, 255, 255, 0.03));
}

.sound-btn--hero {
  width: min(100%, 420px);
  min-height: 96px;
  margin: 0 auto;
  border-width: 3px;
  border-color: var(--lime);
  background: linear-gradient(180deg, rgba(200, 255, 61, 0.18), rgba(200, 255, 61, 0.04));
}

.sound-btn__label {
  font-family: "Bangers", system-ui, sans-serif;
  font-size: clamp(1.4rem, 5vw, 2rem);
  letter-spacing: 0.06em;
}

.sound-btn--hero .sound-btn__label {
  font-size: clamp(2rem, 8vw, 3rem);
}

.sound-btn__hint {
  font-size: 0.75rem;
  color: var(--muted);
}

.footer {
  margin-top: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
}

body.is-shaking {
  animation: shake 220ms ease;
}

@keyframes brandPop {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-4px);
  }
  75% {
    transform: translateX(4px);
  }
}

@media (min-width: 720px) {
  .grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .sound-btn {
    min-height: 84px;
  }
}

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