*{ box-sizing:border-box; }
body { font-family: system-ui, Arial; background:#f5f6f8; margin:0; }
.top { display:flex; justify-content:space-between; padding:12px 16px; }
a { color:#1b5cff; text-decoration:none; }
.card { max-width:900px; margin:16px auto; background:#fff; padding:16px; border-radius:12px; box-shadow:0 6px 20px rgba(0,0,0,.06); }
.grid { display:grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap:12px; }
.tile { display:block; padding:18px; border:1px solid #e6e8ee; border-radius:12px; background:#fff; }
.tile:hover { border-color:#cfd6ff; box-shadow:0 8px 18px rgba(27,92,255,.10); }
label { display:block; margin:10px 0; }
input, select, button { width:100%; padding:10px; border-radius:10px; border:1px solid #d7dbe7; }
button { cursor:pointer; border:none; background:#1b5cff; color:#fff; font-weight:600; }
input[type="checkbox"]{ width:auto; }
.ok { background:#e8fff0; border:1px solid #b6f2c8; padding:10px; border-radius:10px; margin:10px 0; }
.err { background:#ffecec; border:1px solid #ffbdbd; padding:10px; border-radius:10px; margin:10px 0; }
pre { white-space:pre-wrap; }

/* Admin UI helpers */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:12px 16px;
  background:#fff;
  border-bottom:1px solid #e6e8ee;
  position:sticky;
  top:0;
  z-index:10;
}
.topbar .nav{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
}
.topbar .nav a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:6px 10px;
  border-radius:8px;
  border:1px solid #e6e8ee;
  background:#fff;
  font-size:13px;
  text-decoration:none;
}
.topbar .nav a:hover{
  background:#f5f7ff;
  border-color:#cfd6ff;
}
.topbar .nav a.active{
  background:#f4f7ff;
  border-color:#cfd6ff;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:6px 10px;
  border-radius:8px;
  border:1px solid #dbe0ee;
  background:#fff;
  color:#2563eb;
  text-decoration:none;
  font-size:12px;
  line-height:1;
  height:28px;
}
.btn.primary{background:#2563eb;border-color:#2563eb;color:#fff}
.btn.danger{border-color:#fecaca;background:#fff5f5;color:#991b1b}

/* Admin layout */
body.admin-page{ background:#f6f7fb; }
.admin-wrap{ margin:16px auto; padding:0 16px; }
.admin-card{
  background:#fff;
  border:1px solid #e6e8f0;
  border-radius:14px;
  padding:14px;
  box-shadow:none;
}
.admin-row{ display:grid; gap:14px; }
.admin-list{ margin-top:8px; }
.admin-list-item{
  padding:10px;
  border:1px solid #e6e8f0;
  border-radius:10px;
  margin-bottom:8px;
  background:#fff;
}
.admin-badge{
  font-size:12px;
  color:#065f46;
  background:#ecfdf5;
  border:1px solid #a7f3d0;
  border-radius:999px;
  padding:2px 8px;
}
.admin-actions{ display:flex; gap:6px; align-items:center; flex-wrap:wrap; }
.admin-actions form{ margin:0; display:inline-flex; }
.admin-meta{ font-size:12px; color:#6b7280; }
.admin-msg{ padding:10px 12px; border-radius:10px; margin-bottom:12px; }
.admin-ok{ background:#ecfdf5; border:1px solid #a7f3d0; color:#065f46; }
.admin-bad{ background:#fef2f2; border:1px solid #fecaca; color:#991b1b; }

/* Mobile defaults */
@media (max-width: 768px) {
  .topbar{ padding:10px 12px; gap:8px; }
  .topbar .nav{ gap:6px; }
  .topbar .nav a{ font-size:14px; padding:8px 10px; }
  .card{ margin:12px; padding:14px; }
  .grid{ grid-template-columns: 1fr; }
  .tile{ padding:14px; }
  input, select, button{ padding:16px; font-size:18px; }
}

@media (max-width: 480px) {
  body{ font-size:19px; }
  .topbar{ flex-wrap:wrap; padding:14px 12px; }
  .topbar .nav{ width:100%; justify-content:flex-start; }
  .topbar .nav a{ font-size:16px; padding:10px 12px; }
  .admin-wrap{ padding:0 10px; }
  .admin-card{ padding:16px; }
  .admin-actions{ gap:6px; }
  .btn{ height:38px; font-size:16px; }
  label{ font-size:16px; }
}