* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f1f5f9;
    color: #333333;
    line-height: 1.7;
}

header {
    background-color: #2d5c99;
    padding: 20px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 32px;
    margin: 0;
}

header p {
    margin-bottom: 0;
    color: #dbeafe;
}

main {
    padding: 0 20px;
    max-width: 900px;
    margin: 30px auto;
}

section {
    margin-bottom: 25px;
    background-color: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
}

section h2 {
    color: #1e3a5f;
    border-bottom: 2px solid #60a5fa;
    padding-bottom: 8px;
}

section p {
    font-size: 16px;
}

section a {
    color: #2563eb;
    font-weight: bold;
}

section a:hover {
    color: #1e3a5f;
}

@media screen and (max-width: 600px) {
    header h1 {
        font-size: 25px;
    }

    main {
        padding: 0 12px;
        margin: 15px auto;
    }

    section {
        padding: 18px;
    }
}