body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #0f172a;
    color: #e2e8f0;
}

header {
    background: #1e293b;
    padding: 15px;
    text-align: center;
}

nav a {
    margin: 0 10px;
    color: #38bdf8;
    text-decoration: none;
    cursor: pointer;
}

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

main {
    padding: 30px;
}

.hidden {
    display: none;
}

footer {
    text-align: center;
    padding: 20px;
    background: #1e293b;
}

.hero {
    background: url('img/bg.jpg') center/cover no-repeat;
    height: 300px;
    position: relative;
}

.overlay {
    background: rgba(0, 0, 0, 0.6);
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 48px;
    margin: 0;
}

.hero p {
    margin: 10px 0 20px;
    color: #cbd5f5;
}