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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Auth Pages */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.auth-box h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
    width: auto;
    padding: 8px 16px;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.auth-link {
    text-align: center;
    margin-top: 20px;
    color: #666;
}

.auth-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.auth-link a:hover {
    text-decoration: underline;
}

.message {
    padding: 12px;
    border-radius: 5px;
    margin-top: 20px;
    text-align: center;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Dashboard */
.dashboard-container {
    min-height: 100vh;
    background: #f5f5f5;
}

.header {
    background: white;
    padding: 20px 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    color: #667eea;
    font-size: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info span {
    color: #333;
    font-weight: 500;
}

.main-content {
    display: flex;
    height: calc(100vh - 80px);
}

.sidebar {
    width: 300px;
    background: white;
    padding: 20px;
    overflow-y: auto;
    box-shadow: 2px 0 4px rgba(0,0,0,0.1);
}

.sidebar h2 {
    color: #333;
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #667eea;
}

.users-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.user-item {
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.user-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.user-status.online {
    background: #28a745;
}

.user-status.offline {
    background: #6c757d;
}

.user-status.busy {
    background: #ffc107;
}

.user-name {
    font-weight: 500;
    color: #333;
}

.content-area {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.welcome-message {
    text-align: center;
    margin-top: 100px;
}

.welcome-message h2 {
    color: #333;
    margin-bottom: 15px;
}

.welcome-message p {
    color: #666;
    font-size: 16px;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 10px;
    max-width: 400px;
    width: 90%;
    text-align: center;
}

.modal-content h2 {
    color: #333;
    margin-bottom: 15px;
}

.modal-content p {
    color: #666;
    margin-bottom: 25px;
    font-size: 16px;
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.modal-actions .btn {
    width: auto;
    padding: 10px 30px;
}

/* Video Call Page */
.video-container {
    min-height: 100vh;
    background: #1a1a1a;
    display: flex;
    flex-direction: column;
}

.video-header {
    background: #2d2d2d;
    padding: 15px 30px;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.video-area {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    position: relative;
}

#remoteVideo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #000;
    border-radius: 10px;
}

#localVideo {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 250px;
    height: 180px;
    object-fit: cover;
    background: #000;
    border-radius: 10px;
    border: 3px solid white;
}

.video-controls {
    background: #2d2d2d;
    padding: 20px;
    display: flex;
    justify-content: center;
    gap: 15px;
}

.control-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 24px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-btn.mute {
    background: #4a4a4a;
    color: white;
}

.control-btn.mute.active {
    background: #dc3545;
}

.control-btn.video {
    background: #4a4a4a;
    color: white;
}

.control-btn.video.active {
    background: #dc3545;
}

.control-btn.end {
    background: #dc3545;
    color: white;
}

.control-btn:hover {
    transform: scale(1.1);
}

.call-status {
    text-align: center;
    color: white;
    font-size: 18px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        max-height: 300px;
    }
    
    #localVideo {
        width: 150px;
        height: 110px;
        bottom: 80px;
    }
}