:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --text: #f8fafc;
    --text-muted: #94a3b8;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
}

nav {
    display: flex;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    background: var(--surface);
    border-bottom: 1px solid #334155;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.links a {
    color: var(--text-muted);
    text-decoration: none;
    margin-left: 1.5rem;
    transition: color 0.2s;
}

.links a:hover {
    color: var(--text);
}

main {
    padding: 4rem 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.1s, background 0.2s;
    margin: 0.5rem;
}

.btn:active {
    transform: scale(0.95);
}

.primary {
    background: var(--primary);
    color: white;
}

.primary:hover {
    background: var(--primary-hover);
}

.secondary {
    background: #334155;
    color: white;
}

.secondary:hover {
    background: #475569;
}

.product-card {
    background: var(--surface);
    padding: 3rem;
    border-radius: 1rem;
    border: 1px solid #334155;
}

.price {
    font-size: 1.5rem;
    color: var(--text);
    font-weight: 600;
    margin-bottom: 1.5rem;
}