body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 1rem;
}

.solar-system-description {
    background-color: white;
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.features ul {
    list-style-type: disc;
    padding-left: 30px;
}

.features li[class]:not(.appliance-list) {
    color: #27ae60;
    font-weight: bold;
}

.appliance-list {
    color: #2980b9;
    font-weight: bold;
}

.note {
    background-color: #f1c40f;
    padding: 10px;
    border-radius: 5px;
    margin-top: 15px;
}

.contact {
    background-color: #3498db;
    color: white;
    text-align: center;
    padding: 20px;
    border-radius: 8px;
}

.contact-btn {
    background-color: white;
    color: #3498db;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.contact-btn:hover {
    background-color: #f1f1f1;
}

footer {
    text-align: center;
    background-color: #34495e;
    color: white;
    padding: 10px;
}