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

:root {
  --bg: #0a0a0a;
  --surface: #161616;
  --surface-hover: #1e1e1e;
  --border: #2a2a2a;
  --text: #e8e8e8;
  --text-dim: #888;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.3);
  --danger: #ef4444;
  --success: #22c55e;
  --radius: 12px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: calc(16px + var(--safe-top)) 16px calc(16px + var(--safe-bottom));
}

/* Header */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 16px;
  flex-shrink: 0;
}

header h1 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

.status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: background 0.3s;
}

.status.connected .dot { background: var(--success); }
.status.disconnected .dot { background: var(--danger); }
.status.connecting .dot {
  background: var(--accent);
  animation: pulse 1.2s ease-in-out infinite;
}

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


/* Preview */
#preview-section {
  flex-shrink: 0;
  padding-bottom: 16px;
}

.preview-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  min-height: 80px;
  max-height: 160px;
  overflow-y: auto;
  transition: border-color 0.3s;
}

.preview-box.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow);
}

#preview-text {
  font-size: 16px;
  line-height: 1.5;
  word-break: break-word;
}

#preview-text.placeholder {
  color: var(--text-dim);
  font-style: italic;
}

/* Mic Button */
#mic-section {
  display: flex;
  justify-content: center;
  padding: 24px 0;
  flex-shrink: 0;
}

#mic-btn {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  -webkit-user-select: none;
  touch-action: none;
}

#mic-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#mic-btn:not(:disabled):active,
#mic-btn.recording {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: scale(1.08);
  box-shadow: 0 0 24px var(--accent-glow);
}

#mic-btn.recording {
  animation: mic-pulse 1s ease-in-out infinite;
}

@keyframes mic-pulse {
  0%, 100% { box-shadow: 0 0 24px var(--accent-glow); }
  50% { box-shadow: 0 0 48px var(--accent-glow), 0 0 80px rgba(59, 130, 246, 0.15); }
}
/* History */
#history-section {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 8px;
  flex-shrink: 0;
}
.history-header h2 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.text-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.2s;
}
.text-btn:active {
  background: rgba(59, 130, 246, 0.1);
}
#history-list {
  list-style: none;
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
#history-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.4;
  cursor: pointer;
  transition: background 0.15s;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
#history-list li:active {
  background: var(--surface-hover);
}
#history-list li .hist-text {
  flex: 1;
  word-break: break-word;
}
#history-list li .hist-time {
  font-size: 11px;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 2px;
}
#history-empty {
  text-align: center;
  padding: 32px 0;
}
.placeholder {
  color: var(--text-dim);
  font-size: 14px;
}
/* Scrollbar */
#history-list::-webkit-scrollbar {
  width: 4px;
}
#history-list::-webkit-scrollbar-track {
  background: transparent;
}
#history-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}