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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --success-color: #22c55e;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

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

header {
    text-align: center;
    padding: 40px 0;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Role Selection */
.role-selection {
    display: flex;
    gap: 30px;
    justify-content: center;
    margin-top: 60px;
    flex-wrap: wrap;
}

.role-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    width: 300px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.role-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.2);
}

.role-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.role-card h2 {
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.role-card p {
    color: var(--text-secondary);
}

/* Buttons */
.primary-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
    font-weight: 600;
}

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

.primary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.danger-btn {
    background: var(--danger-color);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
    font-weight: 600;
}

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

.back-btn {
    color: var(--text-secondary);
    cursor: pointer;
    padding: 10px 0;
    display: inline-block;
    transition: color 0.3s;
}

.back-btn:hover {
    color: var(--primary-color);
}

.copy-btn {
    background: var(--border-color);
    color: var(--text-primary);
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s;
    margin-left: 10px;
}

.copy-btn:hover {
    background: var(--primary-color);
}

/* Settings Panel */
.settings-panel {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin: 20px 0;
}

.settings-panel h3 {
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.setting-group {
    margin-bottom: 20px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.setting-group select,
.setting-group input[type="range"] {
    width: 100%;
    padding: 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
}

.setting-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.setting-group input[type="range"] {
    padding: 0;
    height: 8px;
    cursor: pointer;
}

.setting-group input[type="checkbox"] {
    margin-right: 10px;
    transform: scale(1.2);
}

#bitrate-value {
    display: inline-block;
    margin-left: 10px;
    color: var(--primary-color);
    font-weight: 600;
}

/* Room Info */
.room-info {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.room-code {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    letter-spacing: 4px;
}

/* Preview Section */
.preview-section {
    margin: 20px 0;
}

.preview-section h3 {
    margin-bottom: 15px;
}

#local-preview {
    width: 100%;
    max-width: 800px;
    border-radius: 12px;
    background: #000;
    aspect-ratio: 16/9;
}

/* Video Container */
.video-container {
    position: relative;
    margin: 20px 0;
}

#remote-video {
    width: 100%;
    max-width: 100%;
    border-radius: 12px;
    background: #000;
    aspect-ratio: 16/9;
}

.video-controls {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-top: 15px;
    padding: 15px;
    background: var(--card-bg);
    border-radius: 8px;
}

.control-btn {
    background: var(--border-color);
    color: var(--text-primary);
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.3s;
}

.control-btn:hover {
    background: var(--primary-color);
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}

#volume-slider {
    width: 100px;
    cursor: pointer;
}

/* Viewers Section */
.viewers-section {
    margin: 20px 0;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
}

.viewers-section h3 {
    margin-bottom: 15px;
}

#viewers-list {
    list-style: none;
}

#viewers-list li {
    padding: 10px;
    background: var(--bg-color);
    border-radius: 6px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Stats Panel */
.stats-panel {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
}

.stats-panel h3 {
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.stat-item {
    background: var(--bg-color);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Join Form */
.join-form {
    display: flex;
    gap: 15px;
    margin: 30px 0;
    justify-content: center;
    flex-wrap: wrap;
}

#room-code-input {
    padding: 12px 20px;
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    text-align: center;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    width: 200px;
}

#room-code-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Waiting Message */
.waiting-message {
    text-align: center;
    padding: 60px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    max-width: 400px;
    text-align: center;
}

.modal-content h3 {
    margin-bottom: 15px;
}

.modal-content p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .role-selection {
        flex-direction: column;
        align-items: center;
    }

    .role-card {
        width: 100%;
        max-width: 300px;
    }

    header h1 {
        font-size: 2rem;
    }

    .room-code {
        font-size: 1.5rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Fullscreen styles */
.video-container:fullscreen #remote-video,
.video-container:-webkit-full-screen #remote-video {
    width: 100%;
    height: 100%;
    border-radius: 0;
}

.video-container:fullscreen .video-controls,
.video-container:-webkit-full-screen .video-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 0;
    border-radius: 0;
    opacity: 0;
    transition: opacity 0.3s;
}

.video-container:fullscreen:hover .video-controls,
.video-container:-webkit-full-screen:hover .video-controls {
    opacity: 1;
}

/* Host Link Card */
.host-link-card {
    display: flex;
    align-items: center;
    gap: 15px;
    margin: 60px auto 0;
    padding: 20px 30px;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    max-width: 400px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.host-link-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.host-link-icon {
    font-size: 2.5rem;
}

.host-link-text {
    flex: 1;
    text-align: left;
}

.host-link-text strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.host-link-text span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.host-link-arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s;
}

.host-link-card:hover .host-link-arrow {
    transform: translateX(5px);
}