:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.3);
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border: #334155;
  --radius: 12px;
  --radius-sm: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

/* ---- Login Page ---- */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--bg-primary) 0%, #0a0a1a 100%);
}

.login-container { width: 100%; max-width: 400px; padding: 20px; }

.login-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.login-header { text-align: center; margin-bottom: 32px; }
.login-icon { font-size: 48px; margin-bottom: 12px; }
.login-header h1 { font-size: 24px; font-weight: 600; }
.login-subtitle { color: var(--text-muted); font-size: 14px; margin-top: 4px; }

.form-group { margin-bottom: 16px; }
.form-group input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}
.form-group input:focus { border-color: var(--accent); }

.btn-login {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-login:hover { background: var(--accent-hover); }

.login-error {
  margin-top: 16px;
  padding: 10px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  border-radius: var(--radius-sm);
  color: var(--danger);
  font-size: 14px;
  text-align: center;
}

/* ---- App Layout ---- */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.app-header .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16px;
}

.app-header .logo-icon { font-size: 20px; }

.header-status {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background 0.3s;
}
.status-dot.connected { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.speaking { background: var(--accent); box-shadow: 0 0 8px var(--accent); animation: pulse 1s ease infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* ---- Main Content ---- */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Adaptive UI Area */
.ui-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.ui-area::-webkit-scrollbar { width: 6px; }
.ui-area::-webkit-scrollbar-track { background: transparent; }
.ui-area::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

#adaptive-ui-container {
  max-width: 1200px;
  margin: 0 auto;
}

.ui-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  color: var(--text-muted);
  text-align: center;
  gap: 12px;
}
.ui-placeholder-icon { font-size: 48px; opacity: 0.5; }
.ui-placeholder p { font-size: 15px; max-width: 400px; line-height: 1.5; }

/* Generated UI components */
.ui-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.ui-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

/* Generating indicator */
.ui-generating {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 14px;
  margin-bottom: 16px;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--accent);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Transcript Area ---- */
.transcript-area {
  padding: 8px 20px;
  max-height: 120px;
  overflow-y: auto;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
}

.transcript-line {
  font-size: 13px;
  padding: 4px 0;
  color: var(--text-secondary);
}
.transcript-line.user { color: var(--accent); }
.transcript-line.assistant { color: var(--text-primary); }

/* ---- Controls ---- */
.controls-area {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.mic-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  flex-shrink: 0;
}
.mic-btn:hover { border-color: var(--accent); color: var(--accent); }
.mic-btn.active {
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
  animation: pulse 1.5s ease infinite;
}

.text-input-wrapper {
  flex: 1;
  display: flex;
  gap: 8px;
}

.text-input {
  flex: 1;
  padding: 10px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}
.text-input:focus { border-color: var(--accent); }

.send-btn {
  padding: 10px 20px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s;
}
.send-btn:hover { background: var(--accent-hover); }
.send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---- Audio Visualizer ---- */
.audio-viz {
  display: flex;
  align-items: center;
  gap: 2px;
  height: 24px;
}
.audio-viz-bar {
  width: 3px;
  background: var(--accent);
  border-radius: 2px;
  transition: height 0.1s;
}

/* Responsive */
@media (max-width: 768px) {
  .ui-area { padding: 12px; }
  .controls-area { padding: 10px 12px; }
  .ui-grid { grid-template-columns: 1fr; }
}