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

:root {
  --bg-top: #172554;
  --bg-bottom: #0f172a;
  --accent: #3b82f6;
  --accent-2: #22d3ee;
  --danger: #f87171;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --card: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
}

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(1000px 600px at 50% 0%, #1e3a8a, var(--bg-top)) ,
              linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  color: var(--text);
  padding: 1.5rem;
}

.app {
  width: 100%;
  max-width: 620px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1.5rem;
  padding: 2.4rem 2rem;
  text-align: center;
  backdrop-filter: blur(12px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.3);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.card h1 {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--muted);
  margin-top: 0.45rem;
  font-size: 0.95rem;
}

.mic-wrap {
  margin-top: 1.8rem;
}

.mic {
  width: 84px;
  height: 84px;
  display: grid;
  place-items: center;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  cursor: pointer;
  box-shadow: 0 12px 32px rgba(59, 130, 246, 0.5);
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

.mic svg {
  width: 34px;
  height: 34px;
}

.mic:hover {
  transform: scale(1.06);
  box-shadow: 0 16px 40px rgba(59, 130, 246, 0.6);
}

.mic.listening {
  background: var(--danger);
  box-shadow: 0 0 0 0 rgba(248, 113, 113, 0.6);
  animation: pulse 1.6s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(248, 113, 113, 0.55);
  }
  70% {
    box-shadow: 0 0 0 22px rgba(248, 113, 113, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(248, 113, 113, 0);
  }
}

.status {
  margin-top: 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
  min-height: 1.4rem;
}

.status.listening {
  color: var(--danger);
}

.interim {
  min-height: 1.4rem;
  margin-top: 0.4rem;
  font-size: 1rem;
  font-style: italic;
  color: var(--accent-2);
}

.transcript-wrap {
  margin-top: 1.2rem;
  max-height: 220px;
  overflow-y: auto;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border);
  border-radius: 0.9rem;
}

.transcript {
  text-align: left;
  padding: 1.1rem 1.2rem;
  font-size: 1.05rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.transcript .placeholder {
  color: var(--muted);
  font-style: italic;
}

.controls {
  margin-top: 1.3rem;
}

.btn {
  padding: 0.75rem 2rem;
  font-size: 0.95rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.warning {
  margin-top: 1.3rem;
  padding: 0.85rem 1rem;
  font-size: 0.88rem;
  color: #fca5a5;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.35);
  border-radius: 0.75rem;
  line-height: 1.5;
}

@media (max-width: 480px) {
  .card {
    padding: 1.8rem 1.2rem;
  }
}