body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    background-color: #e7f5f6;
    color: black;
    min-height: 100vh;
}

/* Header */
header {
    background: #5F9EA0;
    color: white;
    padding: 25px;
    text-align: center;
    font-size: 42px;
    letter-spacing: 1px;
    font-weight: 600;
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

/* Center content */
ul {
    list-style: none;
    padding: 0;
    margin: 60px auto 30px auto;   /* top | sides | bottom */
    width: 340px;
}

/* Each item spacing */
ul li {
    margin-bottom: 25px;
}

/* Fancy links */
ul li a {
    display: block;
    text-decoration: none;
    background: white;
    padding: 18px;
    border-radius: 14px;
    text-align: center;
    font-size: 19px;
    color: #5F9EA0;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

/* Hover effect */
ul li a:hover {
    background: #5F9EA0;
    color: white;
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.2);
}

/* Back button */
.back {
    display: block;
    margin: 30px auto 20px auto; 
    width: 220px;
    text-align: center;
    text-decoration: none;
    background: white;
    padding: 14px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 18px;
    color: #5F9EA0;
    box-shadow: 0 6px 15px rgba(0,0,0,0.08);
    transition: 0.3s;
}

.back:hover {
    background: #5F9EA0;
    color: white;
    transform: scale(1.08);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}