* {
    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;
    color: #333;
}

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

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

main {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

section {
    margin-bottom: 30px;
}

h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.add-website form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.add-website input {
    flex: 1;
    min-width: 200px;
    padding: 12px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.add-website input:focus {
    outline: none;
    border-color: #667eea;
}

.add-website button {
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.add-website button:hover {
    background: #5a6fd8;
}

.controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.controls button {
    padding: 10px 20px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.controls button:hover {
    background: #218838;
}

.controls button#autoToggle.active {
    background: #ffc107;
    color: #333;
}

.websites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.website-card {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.website-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.website-card.online {
    border-left: 5px solid #28a745;
}

.website-card.offline {
    border-left: 5px solid #dc3545;
}

.website-card.checking {
    border-left: 5px solid #ffc107;
}

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

.website-name {
    font-weight: bold;
    font-size: 1.1rem;
    color: #333;
}

.website-url {
    color: #666;
    font-size: 0.9rem;
    word-break: break-all;
    margin-bottom: 10px;
}

.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
}

.status-indicator.online {
    background: #d4edda;
    color: #155724;
}

.status-indicator.offline {
    background: #f8d7da;
    color: #721c24;
}

.status-indicator.checking {
    background: #fff3cd;
    color: #856404;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
}

.website-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
    font-size: 0.85rem;
    color: #666;
}

.remove-btn {
    background: #dc3545;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background-color 0.3s;
}

.remove-btn:hover {
    background: #c82333;
}

.details-btn {
    background: #667eea;
    color: white;
    border: none;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background-color 0.3s;
    margin-left: 5px;
}

.details-btn:hover {
    background: #5a6fd8;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: #666;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    main {
        padding: 20px;
    }
    
    .add-website form {
        flex-direction: column;
    }
    
    .add-website input {
        min-width: 100%;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .websites-grid {
        grid-template-columns: 1fr;
    }
}