* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}
.container { max-width: 800px; margin: 0 auto; }
.header { text-align: center; color: white; margin-bottom: 30px; }
.header h1 { font-size: 2em; margin-bottom: 10px; }
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 80px;
}
.device-card {
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}
.device-card:hover { transform: translateY(-5px); }
.device-icon { font-size: 3em; text-align: center; margin-bottom: 15px; }
.device-name { font-size: 1.3em; font-weight: 600; color: #333; text-align: center; }
.device-type { color: #666; font-size: 0.9em; text-align: center; margin: 5px 0; }
.device-status {
    text-align: center;
    padding: 8px;
    border-radius: 8px;
    font-size: 0.9em;
    font-weight: 600;
    margin-top: 10px;
}
.device-status.offline { background: #f8d7da; color: #721c24; }
.device-status.online { background: #d4edda; color: #155724; }
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 15px;
    color: #666;
}
.empty-icon { font-size: 4em; margin-bottom: 20px; }
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: #28a745;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    text-decoration: none;
    z-index: 1000;
}
.fab-icon { font-size: 2em; color: white; }
.loading, .error { 
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    background: white;
    border-radius: 15px;
    font-size: 1.2em;
}