:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #10b981;
    --danger: #ef4444;
    --bg: #0f0f0f;
    --surface: #1f1f1f;
    --surface-light: #2a2a2a;
    --border: rgba(255, 255, 255, 0.1);
    --text: #ffffff;
    --text-dim: #a1a1aa;
    --success: #22c55e;
    --warning: #f59e0b;
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
}

header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--surface) 0%, var(--bg) 100%);
    border-radius: 20px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
}

header h1 {
    font-size: 2.5rem;
    margin: 0 0 10px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-dim);
    font-size: 1.1rem;
    margin: 0;
}

main {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.connection-mode {
    background: var(--surface);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.connection-mode h3 {
    margin: 0 0 20px 0;
    color: var(--text);
    font-size: 1.2rem;
}

.mode-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.mode-btn {
    background: var(--surface-light);
    border: 2px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text);
}

.mode-btn:hover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.mode-btn.active {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.2);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.mode-icon {
    font-size: 2.5rem;
}

.mode-name {
    font-weight: 700;
    font-size: 1.1rem;
}

.mode-desc {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.status-card {
    background: var(--surface);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 20px;
}

.status-icon {
    font-size: 4rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.status-text {
    flex: 1;
}

.status-text h2 {
    margin: 0 0 8px 0;
    font-size: 1.5rem;
}

.status-text p {
    margin: 0;
    color: var(--text-dim);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: var(--surface-light);
    border-radius: 10px;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--danger);
    animation: blink 1s infinite;
}

.status-indicator.connected {
    background: var(--success);
    animation: none;
}

.status-indicator.connecting {
    background: var(--warning);
    animation: blink 0.5s infinite;
}

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

.controls {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary, .btn-danger {
    flex: 1;
    min-width: 200px;
    padding: 18px 30px;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.6);
}

.btn-secondary {
    background: var(--surface-light);
    color: var(--text);
    border: 2px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

.btn-danger {
    background: var(--danger);
    color: white;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.6);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 1.5rem;
}

.device-list {
    background: var(--surface);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.device-list h3 {
    margin: 0 0 20px 0;
    color: var(--text);
}

.device-item {
    background: var(--surface-light);
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
}

.device-item:hover {
    border-color: var(--primary);
    transform: translateX(5px);
}

.device-name {
    font-weight: 600;
    font-size: 1rem;
}

.device-type {
    color: var(--text-dim);
    font-size: 0.85rem;
}

.preview-container {
    background: var(--surface);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.preview-container h3 {
    margin: 0 0 15px 0;
    color: var(--text);
}

#preview-video {
    width: 100%;
    border-radius: 12px;
    background: black;
    min-height: 300px;
}

.preview-info {
    display: flex;
    gap: 20px;
    margin-top: 15px;
    padding: 15px;
    background: var(--surface-light);
    border-radius: 10px;
}

.preview-info span {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.info-section {
    background: var(--surface);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.info-section h3 {
    margin: 0 0 15px 0;
    color: var(--primary);
    font-size: 1.2rem;
}

.info-section ul {
    margin: 0;
    padding-left: 20px;
    color: var(--text-dim);
}

.info-section li {
    margin-bottom: 10px;
    line-height: 1.6;
}

footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-top: 40px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    .mode-selector {
        grid-template-columns: 1fr;
    }

    .status-card {
        flex-direction: column;
        text-align: center;
    }

    .controls {
        flex-direction: column;
    }

    .btn-primary, .btn-secondary, .btn-danger {
        width: 100%;
    }

    .preview-info {
        flex-direction: column;
        gap: 10px;
    }
}