body {
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.6;
    color: #222;
    margin: 0;
    padding: 0;
    background: #f4f4f6;
}
header {
    background: #1f1f1f;
    color: #fff;
    padding: 32px 20px;
    text-align: center;
}
header h1 {
    margin: 0;
    font-size: 26px;
    font-weight: 600;
}
.container {
    max-width: 960px;
    margin: 32px auto 40px;
    background: #ffffff;
    padding: 32px 32px 40px;
    border-radius: 12px;
    box-shadow: 0 0 24px rgba(0,0,0,0.06);
}
h2 {
    margin-top: 0;
    font-size: 24px;
}
h3 {
    margin-top: 32px;
    font-size: 20px;
    border-left: 4px solid #000;
    padding-left: 10px;
}
p {
    font-size: 16px;
    margin: 8px 0;
}