:root{
  --bg: #f6f8fb;
  --card: #ffffff;
  --accent: #0b6ef6;
  --muted: #586273;
  --glass: rgba(255,255,255,0.7);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}
*{box-sizing:border-box}
body{
  margin:0;
  background: linear-gradient(180deg,#eef5ff 0%, var(--bg) 100%);
  color:#0b1722;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
}
.wrap{max-width:1100px;margin:0 auto;padding:20px}

.site-header{
  background: var(--card);
  box-shadow: 0 6px 22px rgba(12,18,36,0.06);
  border-bottom: 1px solid rgba(11,110,246,0.04);
}
.site-header .wrap{
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
  justify-content:space-between;
}
.site-header h1{margin:14px 0 6px;font-size:20px}
.tagline{margin:0;color:var(--muted)}

.actions{
  display:flex;
  gap:10px;
  align-items:center;
}
#search{
  padding:10px 12px;
  border-radius:10px;
  border:1px solid #e6eefc;
  min-width:220px;
}
#open-all{
  background:var(--accent);
  color:white;
  border:none;
  padding:10px 12px;
  border-radius:10px;
  cursor:pointer;
}

.grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
  margin-top:20px;
}
.card{
  background:var(--card);
  border-radius:12px;
  padding:14px;
  box-shadow:0 8px 22px rgba(2,6,23,0.04);
  border:1px solid rgba(11,110,246,0.04);
  transition:transform .15s ease, box-shadow .15s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(11,110,246,0.08)}
.card h3{margin:0 0 8px;font-size:16px}
.card p{margin:0 0 12px;color:var(--muted);font-size:14px}
.card .links{display:flex;gap:8px;flex-wrap:wrap}
.card .links a{
  text-decoration:none;padding:8px 10px;border-radius:8px;font-weight:600;
  border:1px solid rgba(11,110,246,0.06);color:var(--accent);
  background:linear-gradient(180deg,rgba(11,110,246,0.03),transparent);
}
.card .links a.secondary{
  background:transparent;color:#0f766e;border-color:rgba(16,185,129,0.06)
}

/* details */
.details{margin-top:24px;background:var(--card);border-radius:12px;padding:18px;box-shadow:0 8px 30px rgba(2,6,23,0.04)}
.hidden{display:none}
.back{background:transparent;border:none;color:var(--accent);font-weight:600;margin-bottom:10px;cursor:pointer}

/* responsive */
@media (max-width:900px){
  .grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .site-header .wrap{flex-direction:column;align-items:flex-start}
  .grid{grid-template-columns:1fr}
  #search{min-width:100%}
}