:root {
    --primary: #4a90e2;
    --primary-dark: #3a7bc8;
    --secondary: #f5f5f5;
    --text: #333;
    --text-light: #666;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background-color: #f8f9fa;
    padding: 20px;
    max-width: 800px;
    margin: 0 auto;
}

header {
    text-align: center;
    padding: 30px 0;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

h1 {
    color: var(--primary);
    margin-bottom: 15px;
}

.status-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 15px 0;
    padding: 10px;
    border-radius: 5px;
    font-weight: 500;
}

.online {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success);
}

.offline {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger);
}

.card {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 25px;
    margin-bottom: 25px;
}

.card h2 {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.feature-list {
    list-style-type: none;
}

.feature-list li {
    padding: 10px 0;
    border-bottom: 1px solid #eee;
    display: flex;
    align-items: center;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li::before {
    content: "✓";
    color: var(--success);
    font-weight: bold;
    margin-right: 10px;
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    background-color: var(--primary);
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
    flex: 1;
    min-width: 150px;
}

button:hover {
    background-color: var(--primary-dark);
}

button.secondary {
    background-color: var(--secondary);
    color: var(--text);
}

button.secondary:hover {
    background-color: #e0e0e0;
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    padding: 15px;
    max-width: 300px;
    display: none;
    z-index: 1000;
}

.notification.show {
    display: block;
    animation: fadeIn 0.5s;
}

.notification h3 {
    margin-bottom: 8px;
    color: var(--primary);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

footer {
    text-align: center;
    margin-top: 30px;
    color: var(--text-light);
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    body {
        padding: 15px;
    }
    
    .buttons {
        flex-direction: column;
    }
    
    button {
        width: 100%;
    }
}