:root{--teal:#017785;--ink:#12303a;--bg:#f4f8f8}
*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.4 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.top{background:var(--teal);padding:calc(14px + env(safe-area-inset-top)) 20px 14px;display:flex;justify-content:center}.logo{height:40px;width:auto}
main{max-width:1100px;margin:0 auto;padding:22px 18px 40px}
.signin{display:flex;justify-content:center;padding-top:8vh}.card{background:#fff;border-radius:22px;padding:30px 26px;max-width:420px;width:100%;box-shadow:0 6px 24px #01778522;text-align:center}
h1{margin:0 0 6px;font-size:28px;color:var(--teal)}.sub{margin:0 0 22px;color:#4b6670}.note{margin:18px 0 0;font-size:14px;color:#6b8790}
.err{color:#b00020;font-weight:600}
.gbtn{display:flex;align-items:center;justify-content:center;gap:12px;padding:15px 18px;border:1px solid #dadce0;border-radius:14px;background:#fff;color:#1f1f1f;font-weight:600;font-size:18px;text-decoration:none}
.gbtn:active{background:#f1f3f4}
.hello{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:4px 4px 18px}
.install{background:var(--teal);color:#fff;border:0;border-radius:12px;padding:10px 16px;font-size:16px;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px}
.tile{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;background:#fff;border-radius:22px;padding:26px 16px 22px;text-decoration:none;color:var(--ink);box-shadow:0 3px 14px #01778518;min-height:190px;justify-content:center}
.tile:active{transform:scale(.98)}.tile img{width:72px;height:72px;border-radius:18px}
.tn{font-weight:700;font-size:20px}.td{font-size:14px;color:#5c7780}
.help{margin:26px 4px 0;color:#4b6670}.help summary{cursor:pointer;font-weight:600}
.foot{margin:26px 4px 0;font-size:14px;color:#6b8790}.foot a{color:var(--teal)}
@media (min-width:900px){.grid{grid-template-columns:repeat(4,1fr)}}