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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 900px;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

.card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 10px;
    font-size: 2.5em;
}

.subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 1.1em;
}

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

input[type="text"] {
    width: 100%;
    padding: 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s;
}

input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin: 5px;
}

.btn-primary {
    background: #667eea;
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #764ba2;
    color: white;
    width: 100%;
}

.btn-secondary:hover {
    background: #633a8a;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(118, 75, 162, 0.4);
}

.btn-small {
    padding: 10px 20px;
    font-size: 14px;
}

.btn-control {
    background: #667eea;
    color: white;
    padding: 12px 24px;
    font-size: 16px;
}

.btn-control:hover {
    background: #5568d3;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

/* Room Screen */
#roomScreen {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.room-info h2 {
    color: #333;
    font-size: 1.8em;
    margin-bottom: 5px;
}

.room-info p {
    color: #666;
    font-size: 1em;
}

.room-actions {
    display: flex;
    gap: 10px;
}

.audio-controls {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: #f5f5f5;
    border-radius: 10px;
}

.participants-container {
    margin-top: 20px;
}

.participants-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.participant-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.participant-card:hover {
    transform: translateY(-5px);
}

.participant-card.self {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.participant-name {
    font-size: 1.2em;
    font-weight: 600;
    margin-bottom: 5px;
}

.participant-status {
    font-size: 0.9em;
    opacity: 0.9;
}

.participant-status.muted {
    color: #ffcccc;
}

.empty-message {
    text-align: center;
    color: #999;
    font-style: italic;
    padding: 40px;
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    display: none;
}

.error-message.show {
    display: block;
}

.audio-indicator {
    margin-top: 10px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    overflow: hidden;
}

.audio-indicator.active {
    background: rgba(76, 175, 80, 0.5);
    animation: pulse 1s infinite;
}

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

@media (max-width: 768px) {
    .room-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .participants-list {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2em;
    }
    
    .card {
        padding: 30px 20px;
    }
}