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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #1a1a2e;
    color: #e0e0e0;
    min-height: 100vh;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.2rem;
    color: #cd412b;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.subtitle {
    color: #888;
    margin-top: 0.5rem;
    font-size: 1.1rem;
}

.error-banner {
    background: #4a1a1a;
    border: 1px solid #cd412b;
    color: #ff6b6b;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    margin-bottom: 2rem;
}

.kits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kit-card {
    background: #16213e;
    border: 1px solid #2a2a4a;
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s;
}

.kit-card:hover {
    border-color: #cd412b;
}

.kit-card h2 {
    color: #fff;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.price {
    font-size: 1.6rem;
    font-weight: 700;
    color: #f7931a;
    margin-bottom: 0.75rem;
}

.description {
    color: #aaa;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.contents {
    flex-grow: 1;
    margin-bottom: 1rem;
}

.contents h3 {
    font-size: 0.85rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.contents ul {
    list-style: none;
    padding: 0;
}

.contents li {
    font-size: 0.85rem;
    color: #ccc;
    padding: 0.2rem 0;
    border-bottom: 1px solid #1a1a3e;
}

.contents li:last-child {
    border-bottom: none;
}

.buy-btn {
    width: 100%;
    padding: 0.8rem;
    background: #f7931a;
    color: #000;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: background 0.2s;
}

.buy-btn:hover {
    background: #e8850f;
}

.success-box {
    background: #162e16;
    border: 1px solid #2a6b2a;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    margin: 3rem 0;
}

.success-box h2 {
    color: #4caf50;
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.success-box p {
    color: #ccc;
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

footer {
    text-align: center;
    color: #666;
    font-size: 0.85rem;
    margin-top: 2rem;
    line-height: 1.6;
}

footer a {
    color: #f7931a;
    text-decoration: none;
}

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

@media (max-width: 600px) {
    .kits-grid {
        grid-template-columns: 1fr;
    }
    header h1 {
        font-size: 1.6rem;
    }
}