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

:root {
    --bg-primary: #0a0e14;
    --bg-secondary: #131920;
    --accent: #39bae6;
    --accent-hover: #59d6ff;
    --text: #e6e1cf;
    --text-muted: #6c7680;
    --border: #1f2833;
    --frost: #73d0ff;
    --api: #c2d94c;
    --docs: #95e6cb;
    --db: #ffb454;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--bg-primary);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-image:
        radial-gradient(ellipse at 20% 20%, rgba(57, 186, 230, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(115, 208, 255, 0.06) 0%, transparent 50%);
}

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

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--accent);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 4rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem 1.5rem;
    text-decoration: none;
    color: var(--text);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--card-accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    border-color: var(--card-accent);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
}

.card-api { --card-accent: var(--api); }
.card-api .card-icon { color: var(--api); }

.card-docs { --card-accent: var(--docs); }
.card-docs .card-icon { color: var(--docs); }

.card-frost { --card-accent: var(--frost); }
.card-frost .card-icon { color: var(--frost); }

.card-db { --card-accent: var(--db); }
.card-db .card-icon { color: var(--db); }

.card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.footer {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace;
}

.footer a {
    color: var(--accent);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

.switcher {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
}

.switcher a {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-secondary);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.switcher a:hover {
    border-color: var(--accent);
    color: var(--accent);
}

@media (max-width: 600px) {
    h1 {
        font-size: 2.5rem;
    }
    .cards {
        grid-template-columns: 1fr;
    }
}