/* ============================================================
   KIAT Learn — class catalog page
   Sub-branded (dark hero) course marketplace. Original treatment.
   ============================================================ */

/* dark sub-brand hero */
.learn-hero{
  margin-top:74px;position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(90% 120% at 88% -10%, rgba(255,174,0,.30), transparent 52%),
    radial-gradient(80% 120% at 0% 110%, rgba(237,50,71,.32), transparent 55%),
    linear-gradient(160deg,#2A2D34 0%, #1c1e24 100%);
  padding:64px 0 0;
}
.learn-hero .crumb{display:flex;gap:8px;align-items:center;font-size:13px;font-weight:600;color:rgba(255,255,255,.6);margin-bottom:22px}
.learn-hero .crumb a:hover{color:#fff}
.learn-hero .crumb span{opacity:.4}
.lh-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding-bottom:54px}
.lh-logo{height:42px;width:auto;margin-bottom:24px}
.learn-hero h1{font-size:clamp(34px,4.8vw,60px);letter-spacing:-.03em;color:#fff;line-height:1.04}
.learn-hero h1 em{font-style:italic;color:var(--amber)}
.learn-hero .lead{color:rgba(255,255,255,.82);font-size:clamp(17px,1.9vw,20px);font-weight:500;margin-top:18px;max-width:48ch}
.lh-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.lh-stats{display:flex;gap:0;margin-top:38px;flex-wrap:wrap}
.lh-stats .s{padding:0 26px;border-left:1px solid rgba(255,255,255,.16)}
.lh-stats .s:first-child{padding-left:0;border-left:none}
.lh-stats .s b{display:block;font-size:30px;font-weight:800;color:var(--amber);letter-spacing:-.02em;line-height:1}
.lh-stats .s span{font-size:13px;font-weight:600;color:rgba(255,255,255,.7)}
/* hero featured class card */
.lh-feature{background:#fff;color:var(--fg);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);transform:rotate(0)}
.lh-feature .ff-media{position:relative;height:190px}
.lh-feature .img-ph{width:100%;height:100%;border:0;border-radius:0}
.lh-feature .ff-soon{position:absolute;top:14px;left:14px;background:var(--amber);color:var(--ink);font-size:12px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;padding:7px 12px;border-radius:999px}
.lh-feature .ff-body{padding:22px 24px 24px}
.lh-feature .ff-cat{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--red)}
.lh-feature h3{font-size:22px;letter-spacing:-.02em;margin:8px 0 10px}
.lh-feature .ff-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);font-weight:600;margin-bottom:16px}
.lh-feature .ff-meta i{color:var(--amber-deep);font-style:normal}
.lh-feature .ff-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;border-top:1px solid var(--line);padding-top:16px}
.lh-feature .ff-price b{font-size:22px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.lh-feature .ff-price s{display:block;font-size:13px;color:var(--muted);font-weight:600}

/* ---------- controls (search + tabs) sticky ---------- */
.learn-controls{position:sticky;top:64px;z-index:50;background:rgba(245,242,238,.9);backdrop-filter:saturate(1.3) blur(12px);border-bottom:1px solid var(--line)}
.lc-row{display:flex;gap:16px;align-items:center;padding:16px 0;flex-wrap:wrap}
.seg{display:inline-flex;background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px;gap:2px}
.seg button{padding:9px 18px;border-radius:999px;font-weight:700;font-size:14px;color:var(--muted);transition:.2s var(--ease)}
.seg button.active{background:var(--ink);color:#fff}
.lc-search{flex:1;min-width:200px;position:relative}
.lc-search input{width:100%;padding:12px 16px 12px 42px;border-radius:999px;border:1px solid var(--line);background:#fff;font-family:inherit;font-size:14.5px;color:var(--fg);transition:.2s}
.lc-search input:focus{outline:none;border-color:var(--red);box-shadow:0 0 0 3px rgba(237,50,71,.12)}
.lc-search svg{position:absolute;left:15px;top:50%;transform:translateY(-50%);width:17px;height:17px;color:var(--muted)}
.cat-row{display:flex;gap:8px;flex-wrap:wrap;padding:0 0 16px}
.cat-pill{padding:8px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-weight:600;font-size:13.5px;color:var(--fg);cursor:pointer;transition:.2s var(--ease)}
.cat-pill:hover{border-color:var(--red)}
.cat-pill.active{background:var(--red);border-color:var(--red);color:#fff}

/* ---------- class grid ---------- */
.learn-section{padding:40px 0 96px}
.result-meta{font-size:14px;color:var(--muted);font-weight:600;margin-bottom:22px}
.result-meta b{color:var(--ink)}
.class-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.class-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);animation:cc-in .4s var(--ease) both}
@keyframes cc-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.class-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.cc-media{position:relative;height:168px}
.cc-media .img-ph{width:100%;height:100%;border:0;border-radius:0}
.cc-badges{position:absolute;top:12px;left:12px;display:flex;gap:7px}
.mode-badge{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:800;letter-spacing:.02em;padding:6px 11px;border-radius:999px;color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.18)}
.mode-badge i{width:7px;height:7px;border-radius:50%;background:#fff}
.mode-online{background:var(--green)}
.mode-offline{background:var(--red)}
.cc-level{position:absolute;top:12px;right:12px;background:rgba(20,14,12,.7);color:#fff;font-size:11px;font-weight:700;padding:5px 10px;border-radius:999px;backdrop-filter:blur(4px)}
.cc-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.cc-cat{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--amber-deep);margin-bottom:8px}
.cc-title{font-size:18.5px;font-weight:800;letter-spacing:-.02em;line-height:1.2;color:var(--ink)}
.cc-desc{font-size:14px;color:var(--muted);font-weight:500;margin-top:8px;line-height:1.5;flex:1}
.cc-meta{display:flex;flex-direction:column;gap:7px;margin:16px 0;padding:14px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cc-meta .m{display:flex;align-items:center;gap:9px;font-size:13.5px;font-weight:600;color:var(--fg)}
.cc-meta .m svg{width:15px;height:15px;color:var(--muted);flex:none}
.cc-meta .seats{color:var(--red);font-weight:700}
.cc-foot{display:flex;align-items:center;justify-content:space-between;gap:12px}
.cc-price b{font-size:20px;font-weight:800;color:var(--ink);letter-spacing:-.02em}
.cc-price .free{color:var(--green)}
.cc-price s{display:block;font-size:12.5px;color:var(--muted);font-weight:600}
.cc-foot .btn{padding:11px 18px;font-size:14px}

.learn-empty{padding:64px;text-align:center;color:var(--muted);font-weight:500;grid-column:1/-1}

/* ---------- past classes gallery ---------- */
.gallery{padding:84px 0;background:var(--paper-2)}
.gallery-head{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;margin-bottom:42px}
.gallery-head .gh-l{max-width:600px}
.gallery-head h2{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.02em;margin-top:14px}
.gallery-head p{margin-top:12px;color:var(--muted);font-weight:500;font-size:16px}
.poster-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.poster-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease);text-decoration:none}
.poster-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.poster-card .pimg{position:relative;aspect-ratio:1/1;overflow:hidden;background:var(--paper-2)}
.poster-card .pimg img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.poster-card:hover .pimg img{transform:scale(1.05)}
.poster-card .ptags{position:absolute;top:12px;left:12px;display:flex;gap:7px;flex-wrap:wrap}
.poster-card .ptag2{font-size:11px;font-weight:800;letter-spacing:.02em;padding:6px 11px;border-radius:999px;color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.ptag2.t-online{background:var(--green)}
.ptag2.t-offline{background:var(--red)}
.ptag2.t-free{background:var(--ink)}
.poster-card .pview{position:absolute;inset:0;display:grid;place-items:center;background:rgba(20,14,12,.42);opacity:0;transition:.3s var(--ease)}
.poster-card:hover .pview{opacity:1}
.poster-card .pview span{background:#fff;color:var(--ink);font-weight:700;font-size:14px;padding:11px 20px;border-radius:999px;display:inline-flex;align-items:center;gap:8px}
.poster-card .pview svg{width:16px;height:16px}
/* past / closed treatment */
.poster-card .pclosed{position:absolute;top:18px;right:-40px;z-index:4;
  background:var(--ink);color:#fff;font-size:11.5px;font-weight:800;letter-spacing:.14em;
  text-transform:uppercase;padding:7px 46px;transform:rotate(45deg);
  box-shadow:0 4px 14px rgba(20,14,12,.32);pointer-events:none}
.poster-card.is-closed .pimg img{filter:grayscale(.4) brightness(.9)}
.poster-card.is-closed .pcap h3{color:var(--muted)}
.poster-card.is-closed .pview span::before{content:"";width:13px;height:13px;border-radius:50%;
  border:2px solid var(--ink);box-sizing:border-box;
  background:linear-gradient(45deg,transparent 45%,var(--ink) 45%,var(--ink) 55%,transparent 55%)}
.poster-card .pcap{padding:18px 20px 20px}
.poster-card .pcap h3{font-size:17px;letter-spacing:-.01em;line-height:1.25;color:var(--ink)}
.poster-card .pcap .pmeta{display:flex;flex-direction:column;gap:5px;margin-top:12px}
.poster-card .pcap .pmeta span{font-size:13.5px;font-weight:600;color:var(--muted);display:flex;align-items:center;gap:8px}
.poster-card .pcap .pmeta svg{width:14px;height:14px;color:var(--amber-deep);flex:none}
.poster-card .pcap .psupport{margin-top:12px;padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;font-weight:600;color:var(--muted)}
.poster-card .pcap .psupport b{color:var(--ink)}
/* invite card */
.poster-more{border:2px dashed var(--line);background:transparent;border-radius:var(--radius);display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:40px 28px;gap:14px;min-height:240px;transition:.3s var(--ease)}
.poster-more:hover{border-color:var(--red);background:rgba(237,50,71,.03)}
.poster-more .pm-ic{width:54px;height:54px;border-radius:16px;background:rgba(237,50,71,.1);display:grid;place-items:center}
.poster-more .pm-ic svg{width:26px;height:26px;color:var(--red)}
.poster-more h3{font-size:19px;letter-spacing:-.01em}
.poster-more p{font-size:14.5px;color:var(--muted);font-weight:500;max-width:30ch}
@media (max-width:1040px){.poster-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){.poster-grid{grid-template-columns:1fr}}

/* ---------- how it works ---------- */
.how{background:var(--paper-2);padding:72px 0}
.how-head{max-width:620px;margin-bottom:42px}
.how-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.how-step{position:relative;padding-top:18px}
.how-step .num{font-size:15px;font-weight:800;color:#fff;background:var(--red);width:34px;height:34px;border-radius:50%;display:grid;place-items:center;margin-bottom:16px}
.how-step:nth-child(2) .num{background:var(--amber-deep)}
.how-step:nth-child(3) .num{background:var(--green)}
.how-step:nth-child(4) .num{background:var(--ink)}
.how-step h4{font-size:18px;letter-spacing:-.01em;margin-bottom:8px}
.how-step p{font-size:14.5px;color:var(--muted);font-weight:500;line-height:1.5}

/* ---------- benefits ---------- */
.benefits-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:42px}
.benefit{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;transition:.3s var(--ease)}
.benefit:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}
.benefit .bi{width:50px;height:50px;border-radius:14px;background:rgba(237,50,71,.1);display:grid;place-items:center;margin-bottom:18px}
.benefit .bi svg{width:24px;height:24px;color:var(--red)}
.benefit:nth-child(2) .bi{background:rgba(232,148,0,.12)}
.benefit:nth-child(2) .bi svg{color:var(--amber-deep)}
.benefit:nth-child(3) .bi{background:rgba(31,157,99,.12)}
.benefit:nth-child(3) .bi svg{color:var(--green)}
.benefit h3{font-size:20px;margin-bottom:10px;letter-spacing:-.01em}
.benefit p{font-size:15px;color:var(--muted);font-weight:500;line-height:1.55}

/* ---------- final CTA ---------- */
.learn-cta{background:linear-gradient(135deg,var(--ink),#1c1e24);color:#fff;border-radius:var(--radius-lg);padding:56px 48px;text-align:center;position:relative;overflow:hidden}
.learn-cta::after{content:"";position:absolute;inset:0;background:radial-gradient(50% 120% at 50% 0%,rgba(255,174,0,.28),transparent 60%);pointer-events:none}
.learn-cta > *{position:relative;z-index:1}
.learn-cta h2{color:#fff;font-size:clamp(26px,3.2vw,40px);letter-spacing:-.02em;margin-bottom:14px}
.learn-cta p{color:rgba(255,255,255,.8);font-weight:500;max-width:52ch;margin:0 auto 26px}

@media (max-width:1040px){
  .lh-grid{grid-template-columns:1fr;gap:36px}
  .class-grid{grid-template-columns:repeat(2,1fr)}
  .how-grid{grid-template-columns:repeat(2,1fr);gap:30px}
  .benefits-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .learn-controls{top:0}
  .class-grid{grid-template-columns:1fr;gap:16px}
  .lh-stats .s{padding:0 18px}
  .learn-cta{padding:40px 26px}
}