:root {
    --bg-primary: #0b0f19;
    --bg-card: rgba(22, 28, 45, 0.7);
    --bg-card-border: rgba(255, 255, 255, 0.08);
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.12) 0px, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-family);
    min-height: 100vh;
    padding: 2rem 1.5rem;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--bg-card-border);
    margin-bottom: 2rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--accent-blue), #6366f1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.header h1 {
    font-size: 1.4rem;
    font-weight: 700;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.server-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--bg-card-border);
    font-size: 0.85rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.connected {
    background-color: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
}

.status-dot.disconnected {
    background-color: var(--accent-red);
    box-shadow: 0 0 8px var(--accent-red);
}

/* Grid Layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.call-info-card {
    grid-column: 1 / -1;
}

/* Card Styling */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--bg-card-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
}

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Metrics */
.call-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.metric {
    background: rgba(255, 255, 255, 0.03);
    padding: 1rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.metric-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-value {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
}

.metric-value.code {
    font-family: monospace;
    font-size: 0.85rem;
    color: #93c5fd;
}

/* Badges */
.badge {
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.08);
}

.badge.active {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-outline {
    border: 1px solid var(--bg-card-border);
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), #2563eb);
    color: #fff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-large {
    width: 100%;
    padding: 1.2rem;
    font-size: 1.05rem;
    font-weight: 600;
    border-radius: 12px;
}

.btn-large.recording {
    background: linear-gradient(135deg, var(--accent-red), #dc2626);
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.btn-preset {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--bg-card-border);
    color: var(--text-primary);
    padding: 0.7rem 1rem;
    font-size: 0.85rem;
}

.btn-preset:hover:not(:disabled) {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--accent-blue);
}

/* Visualizer */
.visualizer-container {
    position: relative;
    width: 100%;
    height: 140px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    border: 1px solid var(--bg-card-border);
    overflow: hidden;
    margin-bottom: 1rem;
}

canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.visualizer-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.85rem;
    color: var(--text-secondary);
    pointer-events: none;
}

/* Audio Controls & Stats */
.audio-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.mic-controls {
    text-align: center;
    margin-bottom: 1.5rem;
}

.mic-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.6rem;
}

.audio-presets h3 {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.6rem;
    margin-bottom: 1.5rem;
}