:root {
  color: #f4fbff;
  background: #090b10;
  font-family: "Tektur", system-ui, sans-serif;
  font-synthesis: none;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  --panel: rgba(13, 18, 28, 0.78);
  --panel-border: rgba(255, 255, 255, 0.14);
  --cyan: #62dfff;
  --rose: #ff6b8a;
  --lime: #aaf27f;
  --gold: #ffce5c;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  touch-action: manipulation;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
}

button {
  font: inherit;
  touch-action: manipulation;
}

.app-shell {
  position: relative;
  display: grid;
  min-height: 100vh;
  padding: 24px 14px;
  isolation: isolate;
  background:
    radial-gradient(circle at 20% 18%, rgba(98, 223, 255, 0.28), transparent 28%),
    radial-gradient(circle at 82% 22%, rgba(255, 107, 138, 0.2), transparent 30%),
    radial-gradient(circle at 50% 92%, rgba(170, 242, 127, 0.16), transparent 34%),
    linear-gradient(135deg, #0b1020 0%, #17112d 46%, #071421 100%);
}

.app-shell::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent 78%);
}

.app-shell::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.045), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.035)),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 6px);
  opacity: 0.55;
}

.soundboard-stage {
  width: min(100%, 548px);
  margin: auto;
}

.soundboard {
  position: relative;
  padding: clamp(14px, 3vw, 22px);
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.1), transparent 40%),
    var(--panel);
  box-shadow:
    0 22px 80px rgba(0, 0, 0, 0.38),
    0 0 70px rgba(98, 223, 255, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(18px) saturate(130%);
}

.soundboard::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(120deg, transparent 0 32%, rgba(255, 255, 255, 0.1) 42%, transparent 52%),
    radial-gradient(circle at top, rgba(98, 223, 255, 0.14), transparent 50%);
}

.soundboard__grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(92px, 1fr));
  gap: 12px;
}

.sound-button {
  position: relative;
  display: grid;
  min-height: 106px;
  padding: 12px 8px 10px;
  place-items: center;
  gap: 8px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid color-mix(in srgb, var(--accent), transparent 46%);
  border-radius: 15px;
  color: #faffff;
  background:
    radial-gradient(circle at 50% 18%, color-mix(in srgb, var(--accent), transparent 74%), transparent 44%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.035)),
    rgba(5, 9, 16, 0.78);
  box-shadow:
    0 15px 34px rgba(0, 0, 0, 0.26),
    0 0 24px color-mix(in srgb, var(--accent), transparent 82%),
    inset 0 1px 0 rgba(255, 255, 255, 0.16);
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

.sound-button::before {
  position: absolute;
  inset: 8px;
  pointer-events: none;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 11px;
}

.sound-button:hover {
  border-color: color-mix(in srgb, var(--accent), white 18%);
  box-shadow:
    0 20px 46px rgba(0, 0, 0, 0.36),
    0 0 38px color-mix(in srgb, var(--accent), transparent 70%),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
}

.sound-button:disabled {
  cursor: default;
}

.sound-button--placeholder {
  border-style: dashed;
  color: rgba(244, 251, 255, 0.44);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.025)),
    rgba(5, 9, 16, 0.44);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 0 30px rgba(255, 255, 255, 0.025);
}

.sound-button--placeholder:hover {
  border-color: color-mix(in srgb, var(--accent), transparent 46%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 0 30px rgba(255, 255, 255, 0.025);
  transform: none;
}

.sound-button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent), white 30%);
  outline-offset: 4px;
}

.sound-button.is-playing {
  animation: press-pulse 420ms ease;
}

.sound-button__icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 50%;
  color: var(--accent);
  background:
    radial-gradient(circle at 35% 25%, rgba(255, 255, 255, 0.3), transparent 24%),
    rgba(255, 255, 255, 0.08);
  box-shadow:
    0 0 28px color-mix(in srgb, var(--accent), transparent 62%),
    inset 0 0 0 1px color-mix(in srgb, var(--accent), transparent 54%);
}

.sound-button__icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
  filter: drop-shadow(0 0 8px color-mix(in srgb, var(--accent), transparent 25%));
}

.sound-button__label {
  position: relative;
  max-width: 100%;
  color: rgba(244, 251, 255, 0.92);
  font-size: 0.73rem;
  font-weight: 800;
  line-height: 1.18;
  text-align: center;
  text-shadow: 0 0 14px color-mix(in srgb, var(--accent), transparent 50%);
  white-space: pre-line;
}

@keyframes press-pulse {
  0% {
    transform: translateY(-2px) scale(1);
  }

  42% {
    transform: translateY(1px) scale(0.96);
    box-shadow:
      0 8px 22px rgba(0, 0, 0, 0.3),
      0 0 58px color-mix(in srgb, var(--accent), transparent 42%),
      inset 0 0 30px color-mix(in srgb, var(--accent), transparent 78%);
  }

  100% {
    transform: translateY(-2px) scale(1);
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 18px 12px;
  }

  .soundboard__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .sound-button {
    min-height: 96px;
  }
}

@media (max-width: 420px) {
  .app-shell {
    align-items: start;
    padding-top: 14px;
  }

  .soundboard {
    padding: 12px;
    border-radius: 18px;
  }

  .soundboard__grid {
    gap: 9px;
  }

  .sound-button {
    min-height: 90px;
    padding: 10px 6px 8px;
    border-radius: 14px;
  }

  .sound-button__icon {
    width: 38px;
    height: 38px;
  }

  .sound-button__icon svg {
    width: 21px;
    height: 21px;
  }

  .sound-button__label {
    font-size: 0.68rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}