:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface2: #243044;
  --border: #2d3a4f;
  --text: #e7ecf3;
  --muted: #8b9bb4;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 14px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(34, 197, 94, 0.08), transparent);
}

.app {
  max-width: 860px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

header {
  text-align: center;
  margin-bottom: 1.75rem;
}

header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #60a5fa, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.35rem;
}

.controls {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.lang-row {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.lang-row label {
  flex: 1;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
}

select {
  appearance: none;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 2rem 0.65rem 0.9rem;
  font-size: 0.95rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b9bb4' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
}

select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

#swapBtn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  width: 42px;
  height: 42px;
  border-radius: 10px;
  font-size: 1.2rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s;
}

#swapBtn:hover {
  background: var(--border);
  border-color: var(--accent);
}

.btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.mic-btn {
  flex: 1;
  min-width: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  background: var(--surface2);
  color: var(--text);
  transition: background 0.2s, transform 0.1s, box-shadow 0.2s;
}

.mic-btn:hover {
  background: var(--border);
}

.mic-btn.listening {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  color: white;
  box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.4);
  animation: pulse 1.8s infinite;
}

.mic-btn.listening:hover {
  background: linear-gradient(135deg, #ef4444, #dc2626);
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.45); }
  70% { box-shadow: 0 0 0 14px rgba(220, 38, 38, 0); }
  100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); }
}

.mic-icon {
  font-size: 1.25rem;
}

.secondary {
  padding: 0.85rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface2);
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.secondary:hover {
  background: var(--border);
  border-color: var(--accent);
}

.options {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}

.toggle input {
  width: 1.05rem;
  height: 1.05rem;
  accent-color: var(--accent);
  cursor: pointer;
}

.status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.status .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted);
  flex-shrink: 0;
}

.status.listening .dot {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: blink 1.2s infinite;
}

.status.error .dot {
  background: var(--danger);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 640px) {
  .panels {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.panel h2 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding: 0.75rem 1rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

.text-box {
  flex: 1;
  padding: 1rem;
  font-size: 1.05rem;
  line-height: 1.55;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 140px;
  max-height: 320px;
}

#original {
  color: #cbd5e1;
}

#translated {
  color: #86efac;
  font-weight: 500;
}

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

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

footer .note {
  margin-top: 0.25rem;
  opacity: 0.8;
}