/* Global styles */
body {
    max-width: 900px;
    margin: 40px auto;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    padding: 0 20px;
    background-color: #f9f9f9;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
    background: #0066cc;
    color: white;
    padding: 15px 20px;
    border-radius: 5px;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

header select {
    font-size: 16px;
    padding: 5px;
    border-radius: 4px;
    border: none;
}

/* Main content */
main {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

/* Lists */
ul {
    list-style-type: none;
    padding: 0;
}

ul li {
    margin-bottom: 10px;
}

ul li a {
    display: block;
    padding: 10px;
    border-radius: 5px;
    background: #e3f2fd;
    text-decoration: none;
    color: #0066cc;
    font-weight: bold;
    transition: background 0.3s;
}

ul li a:hover {
    background: #bbdefb;
}

/* Footer */
footer {
    margin-top: 30px;
    border-top: 2px solid #ddd;
    padding-top: 10px;
    text-align: center;
    font-size: 14px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 15px;
    margin-top: 10px;
    border: none;
    background-color: #0066cc;
    color: white;
    font-weight: bold;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: #004c99;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        margin: 10px;
        padding: 10px;
    }

    header {
        flex-direction: column;
        text-align: center;
    }

    select {
        margin-top: 5px;
    }
}