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

:root {
  --bg: #0F1117;
  --surface: #16162a;
  --text: #ffffff;
  --subtext: #aaa8cc;
  --radius: 20px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

.animated-bg {
  position: fixed;
  inset: 0;
  background: linear-gradient(135deg, #0f0035, #0a0a1a, #001020, #0a0020);
  background-size: 400% 400%;
  animation: bgShift 8s ease infinite;
  z-index: 0;
  pointer-events: none;
}

@keyframes bgShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.app {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

header {
  text-align: center;
  margin-bottom: 28px;
}

h1 {
  font-size: clamp(1.8rem, 6vw, 2.8rem);
  font-weight: 900;
  background: linear-gradient(90deg, #ff6b9d, #c44dff, #4daaff, #00f5d4);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: textGlow 3s ease infinite;
  letter-spacing: 2px;
}

@keyframes textGlow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.subtitle {
  color: var(--subtext);
  font-size: 0.88rem;
  margin-top: 6px;
}

.controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 14px;
}

.ctrl-btn {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50px;
  padding: 7px 18px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  backdrop-filter: blur(10px);
  transition: all 0.15s;
}
.ctrl-btn:hover { background: rgba(255,255,255,0.15); border-color: #c44dff; }

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.sound-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 20px 10px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  font-size: 2rem;
  font-family: inherit;
  font-weight: 800;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s, box-shadow 0.15s;
  user-select: none;
  backdrop-filter: blur(10px);
}

.sound-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.85;
  z-index: 0;
}

.sound-btn > * { position: relative; z-index: 1; }

.sound-btn span {
  font-size: 0.62rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.2;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Individual button colors */
.sound-btn:nth-child(1)::before  { background: linear-gradient(135deg, #ff6b9d, #c44dff); }
.sound-btn:nth-child(2)::before  { background: linear-gradient(135deg, #ffd700, #ff9500); }
.sound-btn:nth-child(3)::before  { background: linear-gradient(135deg, #4daaff, #0066ff); }
.sound-btn:nth-child(4)::before  { background: linear-gradient(135deg, #00f5d4, #00b894); }
.sound-btn:nth-child(5)::before  { background: linear-gradient(135deg, #f9ca24, #f0932b); }
.sound-btn:nth-child(6)::before  { background: linear-gradient(135deg, #636e72, #2d3436); }
.sound-btn:nth-child(7)::before  { background: linear-gradient(135deg, #ff4757, #c0392b); }
.sound-btn:nth-child(8)::before  { background: linear-gradient(135deg, #2ed573, #009432); }
.sound-btn:nth-child(9)::before  { background: linear-gradient(135deg, #eccc68, #ffa502); }
.sound-btn:nth-child(10)::before { background: linear-gradient(135deg, #c44dff, #8854d0); }
.sound-btn:nth-child(11)::before { background: linear-gradient(135deg, #4daaff, #ff6b9d); }
.sound-btn:nth-child(12)::before { background: linear-gradient(135deg, #2d3436, #636e72); }

.sound-btn:nth-child(3) span,
.sound-btn:nth-child(4) span,
.sound-btn:nth-child(6) span { color: rgba(255,255,255,0.9); }

.sound-btn:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 8px 32px rgba(196, 77, 255, 0.4);
  border-color: rgba(255,255,255,0.3);
}

.sound-btn:active { transform: scale(0.91); }

.sound-btn.vibe {
  animation: vibeCheck 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes vibeCheck {
  0%   { transform: scale(0.91) rotate(-3deg); }
  30%  { transform: scale(1.12) rotate(3deg); }
  60%  { transform: scale(1.04) rotate(-1deg); }
  100% { transform: scale(1) rotate(0); }
}

footer {
  text-align: center;
  margin-top: 32px;
  color: var(--subtext);
  font-size: 0.72rem;
}

@media (max-width: 400px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}