/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --danger-color: #dc2626;
    --success-color: #16a34a;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --border-color: #475569;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Landing Page */
.landing-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.landing-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.landing-content {
    text-align: center;
    max-width: 600px;
}

.logo {
    margin: 0 auto 2rem;
    display: inline-block;
    animation: fadeInUp 0.6s ease-out;
}

.landing-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--surface);
    border-radius: 12px;
    transition: transform 0.2s;
}

.feature:hover {
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2rem;
}

.landing-footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

.landing-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    color: inherit;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #475569;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.btn-icon {
    padding: 0.5rem;
    background: transparent;
    color: var(--text-primary);
}

.btn-icon:hover {
    background: var(--surface-light);
}

.btn-control {
    width: 56px;
    height: 56px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    color: var(--text-primary);
    border-radius: 50%;
    position: relative;
}

.btn-control:hover {
    background: var(--surface-light);
}

.btn-control[data-active="false"] {
    background: var(--danger-color);
}

.btn-control[data-active="false"]:hover {
    background: #b91c1c;
}

/* Navbar */
.navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.navbar-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
}

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

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-color);
}

/* Dashboard */
.dashboard {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.dashboard h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.dashboard-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.card {
    background: var(--surface);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.card h2 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

.form-input {
    flex: 1;
    padding: 0.75rem;
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.info-section {
    margin-top: 4rem;
}

.info-section h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
}

.feature-item .feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-item h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Room Page */
.room-page {
    height: 100vh;
    overflow: hidden;
}

.room-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--background);
}

.room-header {
    background: var(--surface);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.room-info h2 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.room-id {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-family: 'Courier New', monospace;
}

.room-actions {
    display: flex;
    gap: 0.5rem;
}

/* Video Grid */
.video-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    padding: 1rem;
    overflow-y: auto;
    background: var(--background);
}

.video-container {
    position: relative;
    background: var(--surface);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    border: 2px solid var(--border-color);
}

.video-container.local {
    border-color: var(--primary-color);
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-name {
    font-weight: 500;
    color: white;
}

.video-status {
    display: flex;
    gap: 0.5rem;
}

.status-icon {
    font-size: 1.125rem;
}

/* Controls */
.controls {
    background: var(--surface);
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
}

.controls-left,
.controls-right {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--danger-color);
    color: white;
    font-size: 0.75rem;
    padding: 0.125rem 0.375rem;
    border-radius: 10px;
    font-weight: 600;
}

/* Chat Panel */
.chat-panel {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    width: 350px;
    background: var(--surface);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s;
    z-index: 100;
}

.chat-panel.open {
    transform: translateX(0);
}

.chat-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-message {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.message-author {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--primary-color);
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.message-content {
    background: var(--background);
    padding: 0.75rem;
    border-radius: 8px;
    word-wrap: break-word;
}

.chat-input {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
}

.chat-input .form-input {
    flex: 1;
}

.chat-input .btn {
    padding: 0.75rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Help Text */
.help-text {
    margin-top: 2rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.help-text a {
    color: var(--primary-color);
    text-decoration: none;
}

.help-text a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .landing-content h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .features {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .dashboard {
        padding: 2rem 1rem;
    }
    
    .dashboard h1 {
        font-size: 2rem;
    }
    
    .dashboard-actions {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .room-header {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .controls {
        padding: 1rem;
    }
    
    .controls-left {
        gap: 0.5rem;
    }
    
    .btn-control {
        width: 48px;
        height: 48px;
    }
    
    .chat-panel {
        width: 100%;
    }
}

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--text-secondary);
}

.loading::after {
    content: "⏳";
    font-size: 2rem;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}