:root {
    --bg: #ffffff;
    --fg: #111111;
    --muted: #555555;
    --accent: #ff6b35;
    --border: #e5e5e5;
    --card: #fafafa;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f0f0f;
        --fg: #f2f2f2;
        --muted: #a8a8a8;
        --accent: #ff8a5b;
        --border: #2a2a2a;
        --card: #1a1a1a;
    }
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

main {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 96px;
}

header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 24px;
    margin-bottom: 32px;
}

header a.back {
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
}

header a.back:hover {
    color: var(--accent);
}

h1 {
    font-size: 32px;
    line-height: 1.2;
    margin: 16px 0 8px;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 22px;
    margin-top: 32px;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 17px;
    margin-top: 24px;
    margin-bottom: 8px;
}

p, li {
    color: var(--fg);
}

p {
    margin: 12px 0;
}

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

a:hover {
    text-decoration: underline;
}

ul {
    padding-left: 22px;
}

li {
    margin: 6px 0;
}

.meta {
    color: var(--muted);
    font-size: 14px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
}

footer {
    border-top: 1px solid var(--border);
    margin-top: 48px;
    padding-top: 24px;
    color: var(--muted);
    font-size: 14px;
}

.docs-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 24px;
}

@media (min-width: 600px) {
    .docs-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.doc-card {
    display: block;
    padding: 24px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--fg);
    text-decoration: none;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.doc-card:hover {
    text-decoration: none;
    border-color: var(--accent);
    transform: translateY(-2px);
}

.doc-card h3 {
    margin: 0 0 6px;
    font-size: 18px;
}

.doc-card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.appstore-btn {
    display: inline-block;
    padding: 12px 22px;
    background: var(--fg);
    color: var(--bg);
    border-radius: 12px;
    font-weight: 500;
    text-decoration: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.appstore-btn:hover {
    opacity: 0.85;
    text-decoration: none;
    transform: translateY(-1px);
}