*{box-sizing:border-box}
:root{--bg:#0f172a;--card:rgba(255,255,255,.94);--card-soft:rgba(255,255,255,.12);--text:#0f172a;--muted:#64748b;--primary:#0f766e;--border:rgba(15,23,42,.10)}
html{min-height:100%;background:var(--bg)}
body{margin:0;min-height:100%;font-family:Arial,Helvetica,sans-serif;background:radial-gradient(circle at 20% 0%,rgba(20,184,166,.30),transparent 32%),radial-gradient(circle at 80% 10%,rgba(59,130,246,.22),transparent 30%),var(--bg);color:white}
.app-shell{width:min(520px,calc(100% - 28px));min-height:100dvh;margin:0 auto;padding:calc(20px + env(safe-area-inset-top)) 0 calc(20px + env(safe-area-inset-bottom))}
.hero{display:flex;align-items:center;gap:14px;padding:18px 2px 24px}
.hero-logo-wrap{background:#ffffff;border-radius:18px;padding:8px 10px;box-shadow:0 12px 28px rgba(0,0,0,.24);display:flex;align-items:center;justify-content:center;min-width:120px;max-width:180px}.hero-logo{display:block;max-width:160px;width:100%;height:auto}
h1{margin:0;font-size:30px;line-height:1.1}.hero p{margin:4px 0 0;color:rgba(255,255,255,.75)}
.install-card,.help,.portal-card{border-radius:20px;border:1px solid var(--border);box-shadow:0 14px 34px rgba(0,0,0,.20)}
.install-card{background:var(--card-soft);backdrop-filter:blur(12px);color:white;padding:14px;margin-bottom:16px;display:flex;gap:12px;align-items:center;justify-content:space-between}
.install-card p{margin:4px 0 0;color:rgba(255,255,255,.75);font-size:13px}
button,.portal-card{-webkit-tap-highlight-color:transparent}button{border:0;border-radius:14px;background:var(--primary);color:white;padding:11px 14px;font-weight:700;cursor:pointer}
button:active,.portal-card:active{transform:scale(.985)}.grid{display:grid;gap:14px}
.portal-card{width:100%;display:flex;align-items:center;gap:14px;text-align:left;text-decoration:none;color:var(--text);background:var(--card);padding:18px;min-height:96px}
.portal-card .icon{width:52px;height:52px;border-radius:16px;background:#ecfeff;display:grid;place-items:center;font-size:28px;flex:0 0 auto}
.portal-card strong{display:block;font-size:18px;margin-bottom:4px}.portal-card small{display:block;color:var(--muted);font-size:13px}
.portal-card.disabled{opacity:.65;cursor:not-allowed}
.help{background:rgba(255,255,255,.10);backdrop-filter:blur(12px);color:white;padding:16px;margin-top:18px}
.help h2{margin:0 0 10px;font-size:17px}.help p{margin:8px 0;color:rgba(255,255,255,.78);font-size:14px}
footer{text-align:center;padding:22px 0 4px;color:rgba(255,255,255,.55);font-size:13px}
@media (min-width:720px){.app-shell{padding-top:44px}}