:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --bg-page: #f9fafb;
    --bg-card: #ffffff;
    --border-color: #e5e7eb;
    --max-width: 900px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

header {
    text-align: center;
    padding: 4rem 0 2rem;
}

.logo-container {
    margin-bottom: 2rem;
}

.logo-container img {
    max-width: 250px;
    height: auto;
    border-radius: 12px;
}

main {
    background: var(--bg-card);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border-color);
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #111827;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.last-updated {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 3rem;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    color: #111827;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
    color: #374151;
}

p {
    margin-bottom: 1.25rem;
}

ul {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.sdk-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    list-style: none;
    padding-left: 0;
    margin-top: 1rem;
}

.sdk-item {
    background: #f3f4f6;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sdk-item a {
    font-size: 0.8rem;
    font-weight: 500;
}

footer {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 640px) {
    main {
        padding: 1.5rem;
    }
    h1 {
        font-size: 1.8rem;
    }
    .sdk-list {
        grid-template-columns: 1fr;
    }
}