:root{
  --bg:#fffef9; --paper:#ffffff; --ink:#18222f; --muted:#5a6475;
  --border:#e6e7ea; --shadow:0 10px 28px rgba(0,0,0,.06);
  --accent:#2563eb; --accent-weak:#e6f0ff; --radius:16px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:
    radial-gradient(700px 400px at 0% 0%, #fffbd6 0%, transparent 60%),
    radial-gradient(700px 400px at 100% 0%, #e8fbff 0%, transparent 60%),
    radial-gradient(800px 500px at 100% 100%, #fff0da 0%, transparent 55%),
    var(--bg);
  color:var(--ink);
  font:16px/1.55 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";
  display:block;
  padding:12px;
}

.wrap{
  width:100%;
  max-width:720px;              /* phone-first */
  margin:0 auto;
  background:var(--paper);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;
  padding:14px;
}

.head{padding:2px 0 10px}
.title{font-weight:800; font-size:22px; margin:0}
.subtitle{color:var(--muted); font-size:13px; margin:.25rem 0 0}

/* Card grid: single column on phones, auto-fit above */
.grid{
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
  margin-top:12px;
}

.card{
  display:block; text-decoration:none; color:inherit; background:#fff;
  border:1px solid var(--border); border-radius:14px; padding:12px;
  box-shadow:0 6px 20px rgba(0,0,0,.05);
  transition:transform .12s ease, box-shadow .12s ease, border-color .12s;
}
.card:active{transform:translateY(1px)}
.card h2{margin:.25rem 0 .25rem; font-size:16px}
.card p{margin:.25rem 0 .5rem; color:var(--muted); font-size:14px}
.badge{
  display:inline-block; background:var(--accent-weak); color:var(--accent);
  font-weight:800; font-size:12px; padding:3px 8px; border-radius:999px; border:1px solid #cad8ff
}
.meta{
  display:flex; flex-wrap:wrap; gap:8px; color:var(--muted); font-size:12px
}

.manifest{margin-top:18px}
.hint{color:var(--muted); font-size:12px; margin:.25rem 0 .75rem}

/* ≥768px: widen and make a responsive grid */
@media (min-width:768px){
  body{padding:18px}
  .wrap{max-width:1100px; padding:18px}
  .grid{grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:14px}
  .card h2{font-size:18px}
}