/* /khoa-hoc.html — online course catalogue (owner: learn agent). Scoped under .p-courses (boot page "courses"). */

/* ---------- hero ---------- */
.p-courses .kh-hero__stats{ list-style:none; margin:4px 0 0; padding:0; display:flex; flex-wrap:wrap; gap:8px; }
.p-courses .kh-hero__stat{
  display:inline-flex; align-items:center; gap:7px; min-height:34px; padding:6px 12px; border-radius:var(--ta-r-pill);
  background:rgba(255,255,255,.1); border:1px solid rgba(255,231,163,.35); color:rgba(255,246,225,.95); font-size:13px; font-weight:600;
  -webkit-backdrop-filter:blur(2px); backdrop-filter:blur(2px);
}
.p-courses .kh-hero__stat b{ color:#FFE7A3; font-weight:900; font-variant-numeric:tabular-nums; }
.p-courses .kh-hero__stat .ta-ico{ width:15px; height:15px; color:#FDE68A; }
.p-courses .kh-hero__stat.is-skel{ width:120px; background:rgba(255,255,255,.12); border-color:transparent; animation:khPulse 1.2s ease-in-out infinite alternate; }
@keyframes khPulse{ from{ opacity:.45; } to{ opacity:.9; } }

.p-courses .kh-hero__media{ isolation:isolate; }
.p-courses .kh-hero__media img{ object-position:50% 38%; }
.p-courses .kh-hero__play{
  position:absolute; left:50%; top:50%; width:74px; height:74px; margin:-37px 0 0 -37px; border-radius:50%; display:grid; place-items:center;
  background:rgba(224,38,45,.94); color:#fff; box-shadow:0 0 0 10px rgba(255,255,255,.25), 0 14px 30px rgba(0,0,0,.4);
  animation:khBeat 2.4s var(--ta-ease) infinite;
}
.p-courses .kh-hero__play .ta-ico{ width:30px; height:30px; margin-left:4px; }
@keyframes khBeat{ 0%,100%{ box-shadow:0 0 0 10px rgba(255,255,255,.25), 0 14px 30px rgba(0,0,0,.4); } 50%{ box-shadow:0 0 0 18px rgba(255,255,255,.08), 0 14px 30px rgba(0,0,0,.4); } }
.p-courses .kh-hero__cap{
  position:absolute; left:16px; bottom:16px; display:inline-flex; align-items:center; gap:8px; padding:7px 12px; border-radius:var(--ta-r-pill);
  background:rgba(20,6,8,.72); color:#fff; font-size:12.5px; font-weight:800; -webkit-backdrop-filter:blur(4px); backdrop-filter:blur(4px);
}
.p-courses .kh-hero__capdot{ width:8px; height:8px; border-radius:50%; background:#22C55E; box-shadow:0 0 0 3px rgba(34,197,94,.3); }

/* ---------- filter card ---------- */
.p-courses .kh-filters{ position:relative; margin-bottom:16px; padding:12px 14px; background:#fff; border:1px solid #EFEAE4; border-radius:var(--ta-r-xl); box-shadow:var(--ta-sh-card); }
.p-courses .kh-filters__rows{ display:grid; gap:10px; }
.p-courses .kh-filters__row{ display:grid; grid-template-columns:1fr; gap:6px; align-items:center; min-width:0; }
.p-courses .kh-filters__lbl{ font-size:11px; font-weight:900; letter-spacing:.12em; text-transform:uppercase; color:var(--ta-gold-700); }
.p-courses .kh-filters__chips{ display:flex; gap:8px; overflow-x:auto; scrollbar-width:none; padding:2px 2px 4px; margin:0 -2px; -webkit-mask-image:linear-gradient(90deg,#000 88%,transparent); mask-image:linear-gradient(90deg,#000 88%,transparent); }
.p-courses .kh-filters__chips::-webkit-scrollbar{ display:none; }
.p-courses .kh-chip{ min-height:36px; padding:6px 14px; font-size:13px; font-weight:800; flex:0 0 auto; }
.p-courses .kh-chip__n{ display:inline-grid; place-items:center; min-width:20px; height:20px; padding:0 6px; border-radius:var(--ta-r-pill); background:rgba(142,26,30,.1); font-size:11px; font-weight:900; font-variant-numeric:tabular-nums; }
.p-courses .kh-chip[aria-pressed="true"] .kh-chip__n{ background:rgba(255,255,255,.22); color:#fff; }
.p-courses .kh-skelchip{ width:96px; height:36px; border-radius:var(--ta-r-pill); flex:0 0 auto; }
.p-courses .kh-filters__foot{ display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:10px; margin-top:12px; padding-top:12px; border-top:1px dashed var(--ta-line-2); }
.p-courses .kh-filters__count{ margin:0; font-size:13px; color:var(--ta-muted); }
.p-courses .kh-filters__count b{ color:var(--ta-text); }
.p-courses .kh-filters__tools{ display:flex; align-items:center; gap:10px; margin-left:auto; }
.p-courses .kh-filters__reset{ border:0; background:none; padding:6px 4px; font-size:13px; font-weight:800; color:var(--ta-buy); text-decoration:underline; text-underline-offset:3px; cursor:pointer; }
.p-courses .kh-sort{ min-height:40px; width:auto; padding-block:6px; font-size:13.5px; font-weight:700; }
@media (min-width:768px){
  .p-courses .kh-filters{ padding:16px 18px; }
  .p-courses .kh-filters__row{ grid-template-columns:120px minmax(0,1fr); }
  .p-courses .kh-filters__chips{ flex-wrap:wrap; overflow:visible; -webkit-mask-image:none; mask-image:none; }
}

/* ---------- course cards (extra lines) ---------- */
.p-courses .kh-span{ grid-column:1 / -1; }
.p-courses .kh-card__sub{ margin:-2px 0 0; font-size:13px; line-height:1.5; color:var(--ta-text-2); }
.p-courses .kh-card__perks{ list-style:none; margin:0; padding:0; display:flex; flex-wrap:wrap; gap:4px 12px; }
.p-courses .kh-card__perks li{ display:inline-flex; align-items:center; gap:5px; font-size:12px; font-weight:700; color:#15803D; }
.p-courses .kh-card__perks .ta-ico{ width:13px; height:13px; }
.p-courses .kh-card__code{ position:absolute; z-index:2; left:10px; bottom:8px; padding:3px 8px; border-radius:6px; background:rgba(255,255,255,.92); color:var(--ta-maroon-600); font-size:11px; font-weight:900; letter-spacing:.06em; }
.p-courses .kh-card__exp{ display:inline-flex; align-items:center; gap:6px; margin:0; font-size:12px; font-weight:700; color:var(--ta-muted); }
.p-courses .kh-card__exp .ta-ico{ width:13px; height:13px; }
.p-courses .kh-mine .ta-course{ border-color:#F3D9A8; box-shadow:0 10px 26px rgba(148,100,23,.14); }
.p-courses .kh-minecta{ position:relative; overflow:hidden; display:flex; flex-direction:column; align-items:flex-start; gap:8px; padding:22px; border-radius:var(--ta-r-xl); border:1.5px dashed #E9CF9F;
  background:radial-gradient(110% 80% at 100% 0%, rgba(245,183,49,.22), transparent 60%), #FFFBF3; }
.p-courses .kh-minecta::after{ content:""; position:absolute; right:-24px; bottom:-28px; width:120px; height:120px; opacity:.18; background:var(--ta-ic-blossom-gold) center/contain no-repeat; pointer-events:none; }
.p-courses .kh-minecta__ico{ display:grid; place-items:center; width:46px; height:46px; border-radius:50%; color:#fff; background:linear-gradient(135deg,#8E1A1E,#D22322); box-shadow:0 0 0 3px #fff, 0 0 0 5px var(--ta-gold-500); }
.p-courses .kh-minecta__ico .ta-ico{ width:22px; height:22px; }
.p-courses .kh-minecta__t{ margin:6px 0 0; font-family:var(--ta-font-title); font-size:20px; font-weight:700; color:var(--ta-maroon-500); }
.p-courses .kh-minecta__d{ margin:0; font-size:13.5px; line-height:1.6; color:var(--ta-text-2); }
.p-courses .kh-minecta__ctas{ display:flex; flex-wrap:wrap; gap:8px; margin-top:auto; padding-top:6px; position:relative; z-index:1; }

/* ---------- free-course spotlight ---------- */
.p-courses .kh-spot__card{
  position:relative; display:grid; grid-template-columns:1fr; overflow:hidden; border-radius:var(--ta-r-2xl); background:#fff;
  border:1px solid #EFE6DC; box-shadow:0 14px 34px rgba(60,20,10,.10);
}
.p-courses .kh-spot__media{ position:relative; display:block; aspect-ratio:16/10; background:#2A0B0D; overflow:hidden; }
.p-courses .kh-spot__media img{ width:100%; height:100%; object-fit:cover; object-position:50% 35%; transition:transform .6s var(--ta-ease-out); }
.p-courses .kh-spot__card:hover .kh-spot__media img{ transform:scale(1.04); }
.p-courses .kh-spot__media::after{ content:""; position:absolute; inset:0; background:linear-gradient(180deg, rgba(20,4,6,0) 45%, rgba(20,4,6,.55)); }
.p-courses .kh-spot__play{ position:absolute; z-index:1; left:50%; top:50%; width:68px; height:68px; margin:-34px 0 0 -34px; border-radius:50%; display:grid; place-items:center; background:rgba(224,38,45,.94); color:#fff; box-shadow:0 0 0 9px rgba(255,255,255,.24), 0 12px 26px rgba(0,0,0,.4); }
.p-courses .kh-spot__play svg{ width:28px; height:28px; margin-left:4px; }
.p-courses .kh-spot__ribbon{ position:absolute; z-index:1; left:14px; top:14px; padding:6px 12px; border-radius:var(--ta-r-pill); background:linear-gradient(180deg,#22C55E,#15803D); color:#fff; font-size:12px; font-weight:900; letter-spacing:.04em; text-transform:uppercase; box-shadow:0 6px 14px rgba(21,128,61,.35); }
.p-courses .kh-spot__body{ display:grid; gap:10px; align-content:start; padding:20px 18px 22px; background:radial-gradient(120% 90% at 100% 0%, var(--ta-cream) 0%, #fff 60%); }
.p-courses .kh-spot__title{ font-family:var(--ta-font-title); font-weight:700; font-size:clamp(22px, 1rem + 1vw, 30px); line-height:1.2; color:var(--ta-maroon-500); }
.p-courses .kh-spot__title a:hover{ text-decoration:underline; text-underline-offset:4px; }
.p-courses .kh-spot__lead{ margin:0; font-size:14.5px; color:var(--ta-text-2); }
.p-courses .kh-spot__meta{ margin:0; display:flex; flex-wrap:wrap; align-items:center; gap:4px 14px; font-size:13px; font-weight:700; color:var(--ta-muted); }
.p-courses .kh-spot__meta span{ display:inline-flex; align-items:center; gap:5px; }
.p-courses .kh-spot__meta .ta-ico{ width:14px; height:14px; color:var(--ta-ink); }
.p-courses .kh-spot__list{ list-style:none; margin:4px 0 0; padding:0; display:grid; gap:6px; counter-reset:none; }
.p-courses .kh-spot__list li{ display:flex; align-items:center; gap:10px; padding:9px 12px; border-radius:var(--ta-r-md); background:#fff; border:1px solid var(--ta-line); font-size:13.5px; font-weight:600; }
.p-courses .kh-spot__no{ flex:0 0 auto; width:24px; height:24px; border-radius:50%; display:grid; place-items:center; background:var(--ta-g-gold); color:#4A2A00; font-size:12px; font-weight:900; box-shadow:var(--ta-sh-gold); }
.p-courses .kh-spot__lt{ flex:1 1 auto; min-width:0; }
.p-courses .kh-spot__dur{ flex:0 0 auto; font-size:12px; font-weight:700; color:var(--ta-muted); font-variant-numeric:tabular-nums; }
.p-courses .kh-spot__ctas{ display:flex; flex-wrap:wrap; gap:10px; margin-top:6px; }
.p-courses .kh-spot__ctas .ta-btn{ flex:1 1 180px; }
@media (min-width:960px){
  .p-courses .kh-spot__card{ grid-template-columns:minmax(0,1.05fr) minmax(0,1fr); }
  .p-courses .kh-spot__media{ aspect-ratio:auto; min-height:380px; }
  .p-courses .kh-spot__media img{ position:absolute; inset:0; }
  .p-courses .kh-spot__body{ padding:30px 32px; }
}

/* ---------- how it works ---------- */
.p-courses .kh-steps{ list-style:none; margin:0; padding:0; display:grid; grid-template-columns:1fr; gap:12px; counter-reset:none; }
.p-courses .kh-step{ position:relative; padding:18px 16px 16px 76px; min-height:96px; background:#fff; border:1px solid #EFEAE4; border-radius:var(--ta-r-xl); box-shadow:var(--ta-sh-card); }
.p-courses .kh-step__no{ position:absolute; right:14px; top:8px; font-family:var(--ta-font-display); font-weight:900; font-size:40px; line-height:1; color:rgba(163,21,28,.1); }
.p-courses .kh-step__ico{ position:absolute; left:16px; top:18px; width:46px; height:46px; border-radius:14px; display:grid; place-items:center; color:#fff; background:var(--ta-tx-seigaiha), linear-gradient(135deg,#A3151C,#D22322); background-size:36px 18px, auto; box-shadow:0 8px 16px rgba(163,21,28,.25); }
.p-courses .kh-step__ico .ta-ico{ width:22px; height:22px; }
.p-courses .kh-step__title{ font-size:15.5px; font-weight:900; color:var(--ta-text); }
.p-courses .kh-step__text{ margin:4px 0 0; font-size:13.5px; line-height:1.55; color:var(--ta-muted); }
@media (min-width:768px){ .p-courses .kh-steps{ grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; } }
@media (min-width:1100px){
  .p-courses .kh-steps{ grid-template-columns:repeat(4,minmax(0,1fr)); gap:16px; }
  .p-courses .kh-step{ padding:76px 18px 20px; }
  .p-courses .kh-step__ico{ top:18px; }
  .p-courses .kh-step:not(:last-child)::after{ content:""; position:absolute; z-index:1; right:-14px; top:40px; width:12px; height:12px; border-top:2.5px solid var(--ta-gold-500); border-right:2.5px solid var(--ta-gold-500); transform:rotate(45deg); }
}

/* ---------- activation strip ---------- */
.p-courses .kh-act__card{
  position:relative; overflow:hidden; display:grid; gap:16px; padding:20px 18px; border-radius:var(--ta-r-2xl);
  background:radial-gradient(120% 140% at 0% 0%, #FFF8E8 0%, var(--ta-cream-2) 100%); border:1px solid #EAD3A4; box-shadow:0 12px 28px rgba(148,100,23,.14);
}
.p-courses .kh-act__card::after{ content:""; position:absolute; right:-20px; top:-30px; width:150px; height:150px; opacity:.22; background:var(--ta-ic-blossom-gold) center/contain no-repeat; pointer-events:none; }
.p-courses .kh-act__seal{ width:58px; height:58px; border-radius:50%; display:grid; place-items:center; color:#fff; background:var(--ta-tx-seigaiha), linear-gradient(135deg,#8E1A1E,#D22322); background-size:36px 18px, auto; box-shadow:0 0 0 4px #fff, 0 0 0 6px var(--ta-gold-500), 0 10px 20px rgba(142,26,30,.3); }
.p-courses .kh-act__seal .ta-ico{ width:26px; height:26px; }
.p-courses .kh-act__title{ margin-top:4px; font-family:var(--ta-font-title); font-weight:700; font-size:clamp(19px, .9rem + .7vw, 24px); line-height:1.25; color:var(--ta-maroon-500); }
.p-courses .kh-act__lead{ margin:6px 0 0; font-size:14px; color:var(--ta-text-2); max-width:56ch; }
.p-courses .kh-act__form{ position:relative; z-index:1; display:grid; gap:6px; }
.p-courses .kh-act__row{ display:flex; flex-wrap:wrap; gap:8px; }
.p-courses .kh-act__row .ta-input{ flex:1 1 200px; min-width:0; font-weight:800; letter-spacing:.08em; text-transform:uppercase; }
.p-courses .kh-act__row .ta-input::placeholder{ letter-spacing:0; text-transform:none; font-weight:500; }
.p-courses .kh-act__row .ta-btn{ flex:0 0 auto; min-height:46px; padding-inline:22px; }
.p-courses .kh-act__row .ta-field__msg{ flex:1 1 100%; margin:0; }
.p-courses .kh-act__hint{ margin:0; font-size:12.5px; color:var(--ta-muted); }
.p-courses .kh-act__hint a{ color:var(--ta-maroon-500); font-weight:800; }
@media (min-width:960px){
  .p-courses .kh-act__card{ grid-template-columns:auto minmax(0,1fr) minmax(0,400px); align-items:center; gap:24px; padding:26px 30px; }
}

/* ---------- FAQ + more ---------- */
.p-courses .kh-faq__grid{ display:grid; gap:18px; }
.p-courses .kh-faq__ctas{ display:flex; flex-wrap:wrap; gap:10px; margin-top:14px; }
.p-courses .ta-acc__body a{ color:var(--ta-maroon-500); font-weight:700; text-decoration:underline; text-underline-offset:2px; }
@media (min-width:960px){ .p-courses .kh-faq__grid{ grid-template-columns:minmax(0,.8fr) minmax(0,1.4fr); gap:32px; align-items:start; } .p-courses .kh-faq__intro{ position:sticky; top:90px; } }
.p-courses .kh-more{ margin-bottom:8px; }

@media (prefers-reduced-motion:reduce){
  .p-courses .kh-hero__play,.p-courses .kh-hero__stat.is-skel{ animation:none; }
  .p-courses .kh-spot__media img{ transition:none; }
}

/* ---------- shared learn helpers (khoa-hoc-lib.js) ---------- */
.p-courses .lx-modal-text{ margin:0 0 12px; font-size:14px; line-height:1.6; color:var(--ta-text-2); }
.p-courses .lx-actform{ display:grid; gap:12px; }
.p-courses .lx-code{ font-weight:800; letter-spacing:.08em; text-transform:uppercase; }
.p-courses .lx-error .ta-btn{ margin-top:6px; }

/* ---------- phone tweaks ---------- */
@media (max-width:599px){
  .p-courses .kh-hero .ta-pagehead__actions{ display:flex; width:100%; gap:8px; }
  .p-courses .kh-hero .ta-pagehead__actions .ta-btn{ flex:1 1 140px; min-height:48px; padding-inline:12px; font-size:14.5px; white-space:nowrap; }
  .p-courses .kh-hero__media img{ aspect-ratio:16/10; }
  .p-courses .kh-hero__play{ width:60px; height:60px; margin:-30px 0 0 -30px; }
}