*{box-sizing:border-box}:root{--bg:#f7f5f0;--ink:#171717;--muted:#555;--accent:#0f3d6e;--card:#fff}
@media (prefers-color-scheme:dark){:root{--bg:#121212;--ink:#f2f2f2;--muted:#b5b5b5;--accent:#8fb8e8;--card:#1d1d1d}}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
main{max-width:520px;margin:0 auto;padding:24px 16px 48px}
h1{font-size:26px;line-height:1.2;margin:8px 0 16px}
video{display:block;width:100%;max-width:360px;margin:0 auto 20px;aspect-ratio:9/16;border-radius:14px;background:#000}
p{margin:0 0 14px}
.btn{display:block;text-align:center;background:var(--accent);color:#fff;font-weight:700;text-decoration:none;padding:14px 16px;border-radius:12px;min-height:48px;margin:20px 0}
@media (prefers-color-scheme:dark){.btn{color:#111}}
footer{color:var(--muted);font-size:15px;margin-top:28px}a{color:var(--accent)}