:root {
    --bg: #ffffff;
    --text: #1d1d1f;
    --muted: #6e6e73;
    --line: #e5e5ea;
    --accent: #0a84ff;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --text: #f5f5f7;
        --muted: #98989d;
        --line: #2c2c2e;
        --accent: #409cff;
    }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

.wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

header.top {
    border-bottom: 1px solid var(--line);
}

header.top .wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

header.top .brand {
    font-weight: 600;
    color: var(--text);
}

header.top nav a {
    margin-left: 20px;
    font-size: 15px;
    color: var(--muted);
}

header.top nav a:hover { color: var(--text); text-decoration: none; }

main { padding: 48px 0 64px; }

h1 {
    font-size: 34px;
    line-height: 1.15;
    margin: 0 0 12px;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 21px;
    margin: 40px 0 8px;
    letter-spacing: -0.01em;
}

p, li { margin: 0 0 12px; }

ul { padding-left: 22px; margin: 0 0 12px; }

.lead {
    font-size: 21px;
    line-height: 1.4;
    color: var(--muted);
    margin-bottom: 32px;
}

.meta { color: var(--muted); font-size: 15px; }

.features {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
    border-top: 1px solid var(--line);
}

.features li {
    margin: 0;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}

.features strong { display: block; font-weight: 600; }

.features span { color: var(--muted); font-size: 15px; }

footer {
    border-top: 1px solid var(--line);
    padding: 24px 0 40px;
    color: var(--muted);
    font-size: 14px;
}

footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }

footer a { color: var(--muted); }
footer a:hover { color: var(--text); }