/* ============================================================
   Catalog (Browse Courses) — Pro Edition
   Matches dashboard_pro / quiz_result_pro / quiz_attempt_pro design.
   ============================================================ */

.cat-page {
  --cat-primary:#6366f1;
  --cat-primary-dark:#4f46e5;
  --cat-success:#10b981;
  --cat-danger:#ef4444;
  --cat-warning:#f59e0b;
  --cat-bg:#f8fafc;
  --cat-card:#ffffff;
  --cat-border:#e5e7eb;
  --cat-text:#1f2937;
  --cat-muted:#6b7280;
  --cat-shadow-sm:0 1px 2px rgba(0,0,0,.04);
  --cat-shadow-md:0 4px 12px rgba(0,0,0,.06);
  --cat-shadow-lg:0 12px 32px rgba(0,0,0,.10);
  --cat-radius:14px;
  --cat-radius-lg:18px;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--cat-text);
  background:linear-gradient(180deg,#f1f5f9 0%,#f8fafc 380px);
  min-height:100vh;
  padding-bottom:3rem;
}
.cat-container { max-width:1280px; margin:0 auto; padding:1rem 1rem 2rem; }

/* ── Hero header ─────────────────────────────────────────── */
.cat-hero {
  background:linear-gradient(135deg,#0ea5e9 0%,#6366f1 50%,#8b5cf6 100%);
  color:#fff;
  border-radius:var(--cat-radius-lg);
  padding:1.35rem 1.6rem;
  box-shadow:var(--cat-shadow-lg);
  position:relative;
  overflow:hidden;
  margin-bottom:1rem;
}
.cat-hero::before {
  content:"";
  position:absolute;
  top:-40%;
  right:-10%;
  width:50%;
  height:180%;
  background:radial-gradient(circle,rgba(255,255,255,.18) 0%,transparent 70%);
  pointer-events:none;
}
.cat-hero::after {
  content:"";
  position:absolute;
  bottom:-50%;
  left:-5%;
  width:40%;
  height:180%;
  background:radial-gradient(circle,rgba(255,255,255,.10) 0%,transparent 70%);
  pointer-events:none;
}
.cat-hero-inner {
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:1rem;
}
.cat-hero-text {
  display:flex;
  align-items:center;
  gap:.9rem;
}
.cat-hero-icon {
  width:54px;
  height:54px;
  border-radius:14px;
  background:rgba(255,255,255,.22);
  backdrop-filter:blur(8px);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.4rem;
  border:2px solid rgba(255,255,255,.3);
  flex-shrink:0;
}
.cat-hero h1 {
  font-size:1.45rem;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.1;
  margin:0 0 .2rem 0;
}
.cat-hero-sub {
  font-size:.8rem;
  opacity:.92;
  font-weight:500;
  display:flex;
  align-items:center;
  gap:.5rem;
}
.cat-result-pill {
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  background:rgba(255,255,255,.22);
  backdrop-filter:blur(6px);
  padding:.35rem .85rem;
  border-radius:999px;
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.02em;
}

/* ── Filter card ─────────────────────────────────────────── */
.cat-filters-card {
  background:var(--cat-card);
  border:1px solid var(--cat-border);
  border-radius:var(--cat-radius);
  box-shadow:var(--cat-shadow-md);
  padding:.95rem 1.1rem;
  margin-bottom:1.25rem;
}
.cat-filters-head {
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:.75rem;
  gap:.5rem;
  flex-wrap:wrap;
}
.cat-filters-head h2 {
  font-size:.78rem;
  font-weight:800;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--cat-muted);
  margin:0;
  display:flex;
  align-items:center;
  gap:.45rem;
}
.cat-filters-head h2 i { color:var(--cat-primary); }

.cat-filter-grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:.6rem;
}
.cat-filter {
  position:relative;
}
.cat-filter label {
  display:block;
  font-size:.62rem;
  font-weight:700;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--cat-muted);
  margin-bottom:.25rem;
}
.cat-filter select,
.cat-filter input {
  width:100%;
  padding:.55rem .75rem;
  border:1px solid var(--cat-border);
  border-radius:9px;
  font-size:.85rem;
  background:#f9fafb;
  color:var(--cat-text);
  font-weight:500;
  transition:all .15s;
  appearance:none;
  -webkit-appearance:none;
}
.cat-filter select {
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right .65rem center;
  padding-right:1.8rem;
}
.cat-filter select:focus,
.cat-filter input:focus {
  outline:none;
  background-color:#fff;
  border-color:var(--cat-primary);
  box-shadow:0 0 0 3px rgba(99,102,241,.12);
}
.cat-filter-actions {
  display:flex;
  gap:.45rem;
  margin-top:.8rem;
  justify-content:flex-end;
  flex-wrap:wrap;
}
.cat-btn {
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  padding:.55rem 1.1rem;
  border-radius:9px;
  font-weight:700;
  font-size:.85rem;
  text-decoration:none;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .18s;
  white-space:nowrap;
}
.cat-btn:hover { transform:translateY(-1px); }
.cat-btn-primary {
  background:linear-gradient(135deg,var(--cat-primary),#8b5cf6);
  color:#fff;
  box-shadow:0 4px 12px rgba(99,102,241,.3);
}
.cat-btn-primary:hover { box-shadow:0 6px 16px rgba(99,102,241,.42); color:#fff; }
.cat-btn-outline {
  background:#fff;
  color:var(--cat-muted);
  border-color:var(--cat-border);
}
.cat-btn-outline:hover { border-color:var(--cat-primary); color:var(--cat-primary-dark); }

/* ── Course grid + cards ─────────────────────────────────── */
.cat-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(290px,1fr));
  gap:1.15rem;
}

.cat-card {
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--cat-card);
  border:1px solid var(--cat-border);
  border-radius:var(--cat-radius-lg);
  box-shadow:var(--cat-shadow-sm);
  overflow:hidden;
  text-decoration:none;
  color:inherit;
  transition:all .28s cubic-bezier(.22,1,.36,1);
  opacity:0;
  transform:translateY(10px);
  animation:cat-fadeup .55s cubic-bezier(.22,1,.36,1) forwards;
}
@keyframes cat-fadeup { to { opacity:1; transform:translateY(0); } }
.cat-card:hover {
  transform:translateY(-6px);
  box-shadow:var(--cat-shadow-lg);
  border-color:#c7d2fe;
  color:inherit;
}

/* Image area */
.cat-card-media {
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:linear-gradient(135deg,#eef2ff,#e0e7ff);
}
.cat-card-media img {
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .6s cubic-bezier(.22,1,.36,1);
}
.cat-card:hover .cat-card-media img { transform:scale(1.06); }
.cat-card-media::after {
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.35) 100%);
  pointer-events:none;
}
.cat-card-placeholder {
  width:100%;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#a5b4fc;
  font-size:3rem;
  background:linear-gradient(135deg,#eef2ff,#e0e7ff);
}

/* Badge chips layered over media */
.cat-badge {
  position:absolute;
  top:.7rem;
  padding:.28rem .65rem;
  border-radius:999px;
  font-size:.67rem;
  font-weight:800;
  letter-spacing:.04em;
  text-transform:uppercase;
  backdrop-filter:blur(6px);
  display:inline-flex;
  align-items:center;
  gap:.3rem;
  z-index:2;
}
.cat-badge.pending {
  left:.7rem;
  background:rgba(251,191,36,.95);
  color:#78350f;
}
.cat-badge.lang {
  right:.7rem;
  background:rgba(255,255,255,.92);
  color:#4338ca;
  border:1px solid rgba(255,255,255,.4);
}
.cat-badge.new {
  left:.7rem;
  background:linear-gradient(135deg,#10b981,#059669);
  color:#fff;
}

.cat-card-body {
  flex:1;
  display:flex;
  flex-direction:column;
  padding:1rem 1.1rem 1.1rem;
  gap:.4rem;
}
.cat-card-title {
  font-size:1.02rem;
  font-weight:800;
  line-height:1.3;
  letter-spacing:-.01em;
  color:var(--cat-text);
  margin:0;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.cat-meta {
  display:flex;
  flex-wrap:wrap;
  gap:.3rem;
  margin-top:.2rem;
}
.cat-meta-chip {
  display:inline-flex;
  align-items:center;
  gap:.25rem;
  padding:.18rem .55rem;
  background:#f3f4f6;
  border:1px solid var(--cat-border);
  border-radius:999px;
  font-size:.68rem;
  font-weight:600;
  color:var(--cat-muted);
  line-height:1.2;
}
.cat-meta-chip i { font-size:.75rem; }
.cat-meta-chip.grade { background:#eff6ff; color:#1e40af; border-color:#bfdbfe; }
.cat-meta-chip.board { background:#f0fdf4; color:#15803d; border-color:#bbf7d0; }
.cat-meta-chip.subj  { background:#fef3c7; color:#92400e; border-color:#fde68a; }

.cat-card-foot {
  margin-top:auto;
  padding-top:.75rem;
  display:flex;
  gap:.5rem;
  align-items:center;
}
.cat-view-btn {
  flex:1;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.35rem;
  padding:.55rem .75rem;
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  color:#fff;
  border-radius:9px;
  font-size:.82rem;
  font-weight:700;
  text-decoration:none;
  box-shadow:0 3px 10px rgba(99,102,241,.28);
  transition:all .18s;
}
.cat-view-btn:hover {
  color:#fff;
  box-shadow:0 5px 14px rgba(99,102,241,.42);
  transform:translateY(-1px);
}
.cat-delete-btn {
  flex-shrink:0;
  padding:.55rem .75rem;
  background:#fef2f2;
  border:1px solid #fecaca;
  color:#b91c1c;
  border-radius:9px;
  font-size:.82rem;
  font-weight:700;
  cursor:pointer;
  transition:all .18s;
}
.cat-delete-btn:hover { background:#ef4444; color:#fff; border-color:#ef4444; }

/* ── Empty state ─────────────────────────────────────────── */
.cat-empty {
  text-align:center;
  padding:3.5rem 1.5rem;
  background:var(--cat-card);
  border:1px dashed var(--cat-border);
  border-radius:var(--cat-radius-lg);
  color:var(--cat-muted);
}
.cat-empty .icon {
  width:72px;
  height:72px;
  margin:0 auto .85rem;
  border-radius:50%;
  background:linear-gradient(135deg,#eef2ff,#f3e8ff);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:2rem;
  color:#a5b4fc;
}
.cat-empty h3 {
  font-size:1.1rem;
  font-weight:800;
  color:var(--cat-text);
  margin:.4rem 0 .25rem;
  letter-spacing:-.01em;
}
.cat-empty p { font-size:.88rem; max-width:420px; margin:0 auto; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width:575px){
  .cat-container { padding:.65rem .65rem 2rem; }
  .cat-hero { padding:.9rem 1rem; }
  .cat-hero h1 { font-size:1.1rem; }
  .cat-hero-icon { width:44px; height:44px; font-size:1.15rem; }
  .cat-grid { grid-template-columns:1fr; gap:.9rem; }
  .cat-card-title { font-size:.95rem; }
}

/* ─────────── Bulk select / delete (admin) ─────────── */
.cat-check-wrap{
  position:absolute;top:10px;left:10px;z-index:10;
  cursor:pointer;display:block;
}
.cat-check-wrap input[type="checkbox"]{
  width:20px;height:20px;cursor:pointer;
  accent-color:var(--cat-primary);
  border-radius:5px;
  box-shadow:0 2px 6px rgba(0,0,0,.18);
}
.cat-card{position:relative}
.cat-card.cat-selected{
  outline:2px solid #818cf8;
  box-shadow:0 0 0 3px rgba(99,102,241,.2),0 8px 24px rgba(99,102,241,.15)!important;
}

.cat-bulk-toolbar{
  display:flex;align-items:center;gap:14px;
  background:#fff;border:1px solid var(--cat-border,#e2e8f0);
  border-radius:12px;padding:10px 18px;
  box-shadow:0 2px 8px rgba(15,23,42,.06);
  margin-bottom:16px;
}
.cat-bulk-all{
  display:flex;align-items:center;gap:6px;
  font-size:.78rem;font-weight:600;color:#475569;cursor:pointer;
}
.cat-bulk-all input{width:16px;height:16px;accent-color:var(--cat-primary)}
.cat-bulk-count{font-size:.78rem;font-weight:700;color:var(--cat-primary)}
.cat-bulk-delete{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.42rem .85rem;border-radius:999px;
  font-size:.76rem;font-weight:700;
  background:linear-gradient(135deg,#ef4444,#dc2626);
  color:#fff;border:none;cursor:pointer;
  box-shadow:0 4px 12px rgba(239,68,68,.3);
  transition:all .16s ease;
}
.cat-bulk-delete:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 8px 18px rgba(239,68,68,.4)}
.cat-bulk-delete:disabled{opacity:.5;cursor:not-allowed}