body {  
    background: #F5F3FF; 
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif; 
    font-size: 18px;
    margin: 0;
    padding: 0;
    text-align: left; 
    line-height: 1.6;

    
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

nav ul {
    list-style: none; 
    padding: 12px;
    background: #9370DB; 
    margin: 0 auto; 
    display: flex; 
    justify-content: center; 
    border-bottom: 2px solid #6A5ACD;
}

nav ul li {
    margin: 0 18px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-weight: bold;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

nav ul li a:hover {
    background: #E6E0F8; 
    color: #6A5ACD;
}

.centered-header {
    position: absolute;
    top: 50%; 
    left: 50%; 
    transform: translate(-50%, -50%); 
    background: white; 
    padding: 25px;
    border: 3px solid #9370DB; 
    border-radius: 15px; 
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15); 
    text-align: center;
    max-width: 600px;
}


.centered-header h1, 
h1, h2, h3 {
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-weight: 600;
    color: #6A5ACD;
    margin-bottom: 12px;
}

.centered-header p, 
p, li, a {
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-size: 1.1em;
    color: #333;
    margin: 6px 0;
}


main {
    flex: 1;
}

footer {
    background-color: #9370DB; 
    color: white; 
    text-align: center;
    padding: 14px 0; 
    font-size: 0.95em; 
    border-top: 2px solid #6A5ACD; 
}

@keyframes wave {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}