:root {
    --bg: #ffffff;
    --bg-alt: #f6f7f9;
    --fg: #1f2328;
    --muted: #5b6570;
    --line: #e2e5e9;
    --accent: #1e88e5;
    --accent-fg: #ffffff;
    --hero-from: #263238;
    --hero-to: #37474f;
    --hero-fg: #ffffff;
    --code-bg: #f2f4f6;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #121212;
        --bg-alt: #1a1c1e;
        --fg: #e6e6e6;
        --muted: #a3abb4;
        --line: #2e3338;
        --accent: #64b5f6;
        --accent-fg: #06243d;
        --hero-from: #14191c;
        --hero-to: #22292e;
        --code-bg: #1e2225;
    }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

.wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------------------------------------------------------------- hero */

.hero {
    background: linear-gradient(160deg, var(--hero-from), var(--hero-to));
    color: var(--hero-fg);
    text-align: center;
    padding: 64px 0 56px;
}

.applogo {
    border-radius: 22%;
    display: block;
    margin: 0 auto 18px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, .35);
}

.hero h1 {
    font-size: clamp(2.2rem, 6vw, 3rem);
    margin: 0 0 8px;
    letter-spacing: -.02em;
}

.tagline {
    font-size: clamp(1rem, 2.6vw, 1.2rem);
    margin: 0 auto 28px;
    max-width: 34ch;
    opacity: .92;
}

.download { margin-bottom: 18px; }

.btn {
    display: inline-block;
    padding: 14px 30px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 1.05rem;
    text-decoration: none;
    transition: transform .12s ease, box-shadow .12s ease, opacity .12s ease;
}

.btn-primary {
    background: var(--accent);
    color: var(--accent-fg);
    box-shadow: 0 4px 16px rgba(0, 0, 0, .3);
}

.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0, 0, 0, .38); }
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
    background: rgba(255, 255, 255, .14);
    color: var(--hero-fg);
    border: 1px solid rgba(255, 255, 255, .35);
    font-size: .95rem;
    padding: 11px 22px;
    margin-left: 8px;
}

.btn-secondary:hover { background: rgba(255, 255, 255, .22); }

.meta {
    font-size: .9rem;
    opacity: .82;
    margin: 14px 0 0;
}

.meta.error { opacity: 1; }

.sub {
    font-size: .88rem;
    opacity: .72;
    margin: 0;
}

/* ---------------------------------------------------------------- body */

main { padding: 8px 0 24px; }

section { padding: 40px 0 8px; }

h2 {
    font-size: 1.5rem;
    margin: 0 0 20px;
    letter-spacing: -.01em;
}

h3 {
    font-size: 1.03rem;
    margin: 0 0 6px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
    gap: 16px;
}

.card {
    background: var(--bg-alt);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 18px 20px;
}

.card p { margin: 0; color: var(--muted); font-size: .95rem; }

.steps { padding-left: 22px; }
.steps li { margin-bottom: 10px; }

.note {
    background: var(--bg-alt);
    border-left: 4px solid var(--accent);
    border-radius: 0 8px 8px 0;
    padding: 12px 16px;
    color: var(--muted);
    font-size: .94rem;
}

.linkrow { display: flex; flex-wrap: wrap; gap: 10px 22px; }

a { color: var(--accent); }

.linkrow a { font-weight: 500; }

pre {
    background: var(--code-bg);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 14px 16px;
    overflow-x: auto;
    font-size: .88rem;
}

code {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

p code {
    background: var(--code-bg);
    border-radius: 5px;
    padding: 1px 5px;
    font-size: .9em;
}

/* ---------------------------------------------------------------- assets */

.assets {
    list-style: none;
    padding: 0;
    margin: 16px 0 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.assets a {
    color: var(--hero-fg);
    text-decoration: none;
    border-bottom: 1px dotted rgba(255, 255, 255, .5);
    font-size: .92rem;
}

.assets .size { opacity: .7; }

/* ---------------------------------------------------------------- footer */

footer {
    border-top: 1px solid var(--line);
    margin-top: 32px;
    padding: 24px 0 40px;
}

footer p {
    color: var(--muted);
    font-size: .85rem;
    margin: 0;
}