:root {
    --primary: #00796b;
    --bg1: #e0f7fa;
    --bg2: #f1f8e9;
}

body {
    font-family: "Segoe UI", Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg1), var(--bg2));
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    background-color: var(--primary);
    color: white;
    width: 100%;
    text-align: center;
    padding: 1.5em 0;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
}

h1 {
    margin: 0;
    font-size: 2rem;
}

p {
    color: #333;
    margin: 0.5em 0;
}

header p {
    color: #e0f2f1;
}

main {
    width: 100%;
    max-width: 1000px;
    padding: 20px;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.link-card {
    background: white;
    border-radius: 12px;
    text-align: center;
    padding: 20px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.link-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.link-card a {
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    font-size: 18px;
    word-wrap: break-word;
}

footer {
    margin-top: 50px;
    padding: 10px;
    font-size: 14px;
    color: #666;
    text-align: center;
}

/* Responsive tweaks */
@media (max-width: 768px) {
    h1 {
        font-size: 1.6rem;
    }
    .link-card a {
        font-size: 16px;
    }
    .link-card {
        padding: 15px;
    }
}

@media (max-width: 480px) {
    header {
        padding: 1em 0.5em;
    }
    main {
        padding: 10px;
    }
    .link-grid {
        gap: 15px;
    }
}