*{box-sizing:border-box}body{margin:0;min-height:100vh;padding:clamp(16px,4vw,48px);background:#0c1110;color:#f5f7f6;font:16px/1.65 system-ui,sans-serif}.install-card{max-width:760px;margin:auto;padding:clamp(20px,5vw,48px);background:#16201c;border:1px solid rgba(255, 255, 255, 0.85);border-radius:24px}header{display:flex;flex-wrap:wrap;justify-content:space-between;gap:16px;margin-bottom:32px}nav{display:flex;gap:16px}a{color: #d9d9d9;text-underline-offset:4px}h1{font-size:clamp(28px,5vw,40px);line-height:1.15;letter-spacing:-.03em}h2{font-size:22px;margin-top:0}.intro{font-size:18px;color:#dbe5df}.app-icon{display:block;object-fit:contain}section{background:#080d0b99;border:1px solid rgba(255, 255, 255, 0.85);border-radius:16px;padding:24px;margin:24px 0}ol{padding-left:24px}li{padding-left:8px;margin:14px 0}li::marker{color: #d9d9d9;font-weight:700}button,.open{display:inline-block;padding:12px 20px;border:0;border-radius:10px;background:#a21f25;color:white;font:inherit;font-weight:700;text-decoration:none;cursor:pointer}button:disabled{opacity:.6;cursor:wait}[hidden]{display:none!important}a:focus-visible,button:focus-visible{outline:3px solid #A21F25;outline-offset:4px}#install-status{color:#c5d4cc}footer{border-top:1px solid rgba(255, 255, 255, 0.85);padding-top:20px;margin-top:32px;font-size:14px;color:#c5d4cc}@media(max-width:420px){section{padding:18px}.install-card{border-radius:16px}}

.install-card, .install-card section { box-shadow: 0 0 0 2px rgba(128,128,128,.28), 0 4px 12px rgba(128,128,128,.2); }

main > a:not(.open):hover, main > a:not(.open):focus-visible { color: #A21F25; }

.install-card section:hover, .install-card section:focus-within { border-color: #A21F25; }

@keyframes install-link-pulse { 0%,100% { opacity: 1; } 50% { opacity: .78; } }
@media(prefers-reduced-motion:no-preference) { main > a:not(.open):hover, main footer a:hover { animation: install-link-pulse 1.8s ease-in-out infinite; } }

main > a:not(.open):hover, main > a:not(.open):focus-visible, main footer a:hover, main footer a:focus-visible { color: #A21F25; }

main > a:not(.open):hover, main > a:not(.open):focus-visible, main footer a:hover, main footer a:focus-visible { background-color: #A21F25; color: #fff; }