body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f7;
    color: #1d1d1f;
}
header {
    background: #000;
    color: white;
    padding: 20px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
}
nav {
    display: flex;
    justify-content: center;
    background: #1d1d1f;
    padding: 12px;
}
nav a {
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    font-size: 18px;
    transition: color 0.3s ease;
}
nav a:hover {
    color: #2997ff;
}
.container {
    max-width: 900px;
    margin: 40px auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}
.section-title {
    font-size: 28px;
    margin-bottom: 20px;
    font-weight: 600;
}
.section-content {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 20px;
}
.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #0071e3;
    color: white;
    text-decoration: none;
    font-size: 18px;
    border-radius: 8px;
    transition: background 0.3s ease;
}
.btn:hover {
    background-color: #005bb5;
}