body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

footer {
    text-align: center;
    margin-top: 20px;
    padding: 10px;
    background-color: #ddd;
    color: #333;
}

footer nav a {
    color: #333;
    text-decoration: none;
    margin: 0 5px;
}

footer nav a:hover {
    text-decoration: underline;
}

h1, h2, h3 {
    color: #444;
}

/* IMMERSE header shimmer gradient animation */
.immerse-animate {
    background-image: linear-gradient(90deg, #3b82f6 0%, #3b82f6 10%, #fff 15%, #fff 85%, #3b82f6 90%, #3b82f6 100%);
    background-size: 200% 100%;
    background-repeat: no-repeat;
    animation: immerse-blue-move 6s linear infinite;
}
@keyframes immerse-blue-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Delayed shimmer for section headers */
.immerse-delay {
    animation-delay: 1.5s;
}

.immerse-delay-1 {
    animation-delay: 2s;
}
.immerse-delay-2 {
    animation-delay: 4s;
}