:root {
    /* Deep Indigo Theme */
    --bg-color: #0f1020; /* Very dark indigo background */
    --text-color: #e0e6ed; /* Light cool grey text */
    --card-bg: #1e1e30; /* Lighter indigo for cards */
    --card-hover: #2a2a40; /* Hover state */
    --accent-color: #7986cb; /* Soft indigo accent */
    --subtext-color: #9fa8da; /* Muted indigo text */
    --font-main:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
        sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
    padding: 2rem;
    text-align: center;
}

header {
    margin-bottom: 3rem;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

header p {
    font-size: 1.2rem;
    color: var(--subtext-color);
}

.links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-color);
    transition:
        transform 0.2s,
        background-color 0.2s,
        box-shadow 0.2s;
    border: 1px solid transparent;
}

.card:hover {
    transform: translateY(-5px);
    background-color: var(--card-hover);
    border-color: var(--accent-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.card h2 {
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.card p {
    font-size: 0.95rem;
    color: #c5cae9;
}

footer {
    margin-top: 4rem;
    font-size: 0.9rem;
    color: var(--subtext-color);
    opacity: 0.8;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 2.5rem;
    }
}