:root {
    --bg: #f6f7f9; --card: #fff; --text: #1d2433; --muted: #5f6b7a; --accent: #0a59bc; --border: #e3e6ea;
    color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
    :root { --bg: #111418; --card: #1a1f25; --text: #e8ecf1; --muted: #9aa5b1; --accent: #5aa0ff; --border: #2a3139; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
.hero, main { max-width: 760px; margin: 0 auto; padding: 0 1.25rem; }
.hero { display: flex; gap: 1.5rem; align-items: flex-start; padding-top: 3.5rem; padding-bottom: 2rem; }
.app-icon { border-radius: 22%; flex: none; box-shadow: 0 4px 16px rgba(0,0,0,.15); }
h1 { margin: 0; font-size: 2rem; line-height: 1.2; }
.tagline { margin: .4rem 0 1.25rem; color: var(--muted); font-size: 1.1rem; }
.download {
    display: inline-flex; align-items: center; gap: .6rem; padding: .8rem 1.4rem; border-radius: 999px;
    background: var(--accent); color: #fff; text-decoration: none; font-weight: 600; font-size: 1.05rem;
}
.download:hover { filter: brightness(1.1); }
.download svg { width: 1.2rem; height: 1.2rem; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.download[aria-disabled="true"] { opacity: .5; pointer-events: none; }
.meta { color: var(--muted); font-size: .85rem; margin: .6rem 0 0; }
section { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 1.25rem 1.5rem; margin-bottom: 1.25rem; }
h2 { margin: 0 0 .75rem; font-size: 1.15rem; }
ul, ol { margin: 0; padding-left: 1.25rem; }
li + li { margin-top: .4rem; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: .35rem 1.25rem; margin: 0; font-size: .9rem; }
dt { color: var(--muted); }
dd { margin: 0; overflow-wrap: anywhere; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .82rem; }
@media (max-width: 520px) {
    .hero { flex-direction: column; align-items: center; text-align: center; padding-top: 2rem; }
}