body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #e0f7fa;
    color: #212121;
}

header {
    background: linear-gradient(90deg, #00695c, #26a69a);
    color: #fff;
    padding: 1.5rem 0;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

main {
    max-width: 800px;
    margin: 3rem auto;
    padding: 2rem 1.5rem;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.intro, .content {
    margin-bottom: 2rem;
}

h2 {
    color: #00796b;
    margin-top: 2rem;
    border-bottom: 2px solid #b2dfdb;
    padding-bottom: 0.5rem;
}

footer {
    text-align: center;
    padding: 1rem 0;
    background-color: #004d40;
    color: #fff;
    position: fixed;
    width: 100%;
    bottom: 0;
}