/* Reset and Base Layout */
html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Background */
body::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364), center / cover no-repeat;
    z-index: -1;
    filter: brightness(0.5) saturate(150%);
}

/* Flex Centering */
body {
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Trebuchet MS', sans-serif;
}

/* Main Card */
.card {
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.08); 
    border: 1px solid rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-radius: 3.5% / 7.5%;
    color: #ffffff;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.2);
    text-align: center;
}

/* Heading and Paragraph inside Card */
.card h2, .card p {
    padding: 0;
    margin: 0;
}

/* Nav inside Card */
nav {
    margin-top: 1.5rem;
}

nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

nav li {
    display: flex;
}

nav li a {
    color: #ffffff;
    text-decoration: none;
    padding: 0.4rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 8px;
    transition: background 0.2s ease-in-out;
}

nav li a:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Ad Styling */
.ad {
    margin-top: 2rem;
    width: 100%;
    max-width: 728px;
    text-align: center;
}