html, body {
    height: 100%;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
    margin: 0;
    padding: 0;
    color: #333;
    overflow-x: hidden;
}

header {
    background-color: #ff4500;
    color: white;
    text-align: center;
    padding: 20px 0;
}

main {
    padding: 20px;
    position: relative;
    z-index: 1;
}

h1, h2, h3 {
    font-family: 'Press Start 2P', cursive;
}

h1 {
    margin: 0;
    font-size: 3em;
}

h2 {
    font-size: 2em;
    color: #ff4500;
}

h3 {
    font-size: 1.5em;
    color: #333;
}

section {
    margin-bottom: 20px;
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    margin-bottom: 10px;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
}

.shell {
    position: fixed;
    width: 50px;
    height: 50px;
    opacity: 0.7;
    border: none;
    z-index: 9999;
}

@keyframes moveShells {
    0% { transform: translateX(-50px); }
    100% { transform: translateX(calc(100vw + 50px)); }
}