/* MERQIVO — scalable course discovery UI */
.catalog-page{--catalog-max:1240px}
.catalog-page .wrap{max-width:var(--catalog-max);padding-top:28px}
.catalog-hero{position:relative;isolation:isolate;overflow:hidden;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(230px,.65fr);gap:30px;align-items:end;padding:32px;border:1px solid rgba(255,255,255,.14);border-radius:28px;background:linear-gradient(135deg,rgba(22,30,63,.96),rgba(10,16,34,.86));box-shadow:0 34px 90px rgba(0,0,0,.26),inset 0 1px 0 rgba(255,255,255,.045)}
.catalog-hero{background-image:linear-gradient(rgba(255,255,255,.017) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.017) 1px,transparent 1px),linear-gradient(135deg,rgba(22,30,63,.96),rgba(10,16,34,.86));background-size:38px 38px,38px 38px,auto}
.catalog-hero::before,.catalog-hero::after{content:"";position:absolute;border-radius:50%;filter:blur(4px);pointer-events:none}
.catalog-hero::before{width:260px;height:260px;right:-100px;top:-130px;background:radial-gradient(circle,rgba(124,92,255,.36),transparent 68%)}
.catalog-hero::after{width:220px;height:220px;right:130px;bottom:-170px;background:radial-gradient(circle,rgba(56,217,197,.26),transparent 68%)}
.catalog-eyebrow{display:flex;align-items:center;gap:8px;color:var(--teal);font-size:.68rem;font-weight:800;letter-spacing:.11em;text-transform:uppercase;margin-bottom:10px}
.catalog-eyebrow::before{content:"";width:22px;height:1px;background:var(--teal)}
.catalog-hero h1{font-size:clamp(2rem,4.5vw,3.7rem);line-height:.97;max-width:760px;margin-bottom:14px;letter-spacing:-.045em;text-wrap:balance}
.catalog-hero-copy{position:relative;z-index:1}
.catalog-hero-copy p{max-width:680px;color:#b4bdd3;margin:0;font-size:.94rem;line-height:1.55}
.catalog-proof{position:relative;z-index:1;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.catalog-proof div{padding:13px 10px;border:1px solid rgba(255,255,255,.1);border-radius:14px;background:rgba(255,255,255,.045);text-align:center;backdrop-filter:blur(12px)}
.catalog-proof b{display:block;font:800 1.2rem var(--head)}
.catalog-proof span{display:block;color:#7e8aa9;font-size:.6rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;margin-top:3px}
.catalog-command{position:sticky;top:10px;z-index:16;margin:20px 0 22px;padding:10px;border:1px solid rgba(255,255,255,.13);border-radius:18px;background:rgba(9,14,30,.86);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);box-shadow:0 18px 50px rgba(0,0,0,.22)}
.catalog-command-row{display:flex;align-items:center;gap:10px}
.catalog-search-wrap{position:relative;flex:1;min-width:0}
.catalog-search-icon{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:#8490af;font-size:1rem;pointer-events:none}
.catalog-search{width:100%;height:50px;border:1px solid transparent;border-radius:13px;padding:0 84px 0 43px;background:rgba(255,255,255,.065);color:white;outline:none;font:600 .88rem var(--body);transition:border-color .2s,background .2s,box-shadow .2s}
.catalog-search::placeholder{color:#6f7a97}
.catalog-search:focus{border-color:rgba(169,141,255,.55);background:rgba(255,255,255,.08);box-shadow:0 0 0 4px rgba(124,92,255,.11)}
.catalog-shortcut{position:absolute;right:12px;top:50%;transform:translateY(-50%);display:flex;gap:4px;align-items:center;color:#6f7a97;font-size:.62rem;font-weight:800}
.catalog-shortcut kbd{min-width:24px;padding:4px 6px;text-align:center;border:1px solid var(--line);border-radius:7px;background:#0c1226;color:#abb4cd;box-shadow:inset 0 -1px 0 rgba(255,255,255,.08)}
.catalog-filter-toggle{height:50px;border:1px solid var(--line);border-radius:13px;padding:0 16px;background:var(--glass);color:white;font-weight:800;white-space:nowrap}
.catalog-filter-toggle .filter-count{display:none;margin-left:6px;min-width:18px;height:18px;border-radius:999px;background:var(--violet);place-items:center;font-size:.58rem}
.catalog-filter-toggle.has-filters .filter-count{display:inline-grid}
.catalog-filter-panel{display:flex;align-items:end;gap:10px;max-height:0;overflow:hidden;opacity:0;transition:max-height .26s ease,opacity .2s ease,padding .26s ease;padding:0 2px}
.catalog-filter-panel.open{max-height:150px;opacity:1;padding-top:10px}
.catalog-field{min-width:150px;flex:1}
.catalog-field label{display:block;color:#77829f;font-size:.58rem;font-weight:900;text-transform:uppercase;letter-spacing:.07em;margin:0 0 5px 2px}
.catalog-select{width:100%;height:40px;border:1px solid var(--line);border-radius:10px;background:#10172f;color:white;padding:0 10px;font:700 .72rem var(--body);outline:none}
.catalog-select:focus{border-color:var(--violet2)}
.catalog-clear{height:40px;border:0;background:transparent;color:#cbbfff;font-weight:800;font-size:.72rem;padding:0 10px}
.catalog-active{display:flex;gap:7px;flex-wrap:wrap;margin-top:9px}
.catalog-active:empty{display:none}
.catalog-chip{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(169,141,255,.25);border-radius:999px;padding:5px 9px;background:rgba(124,92,255,.1);color:#d8d0ff;font-size:.63rem;font-weight:800}
.catalog-chip button{border:0;background:none;color:inherit;padding:0;font-weight:900;line-height:1}
.catalog-section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin:28px 0 13px}
.catalog-section-head h2{font:800 1.15rem var(--head);margin:0}
.catalog-section-head p{color:var(--muted);font-size:.72rem;margin:4px 0 0}
.catalog-section-head .results-count{color:#d7cdff;font-size:.72rem;font-weight:800;white-space:nowrap}
.category-rail{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;overflow-x:auto;scrollbar-width:none;padding:2px 2px 8px;scroll-snap-type:x proximity}
.category-rail::-webkit-scrollbar{display:none}
.category-tile{position:relative;overflow:hidden;min-width:150px;min-height:102px;text-align:left;padding:14px;border:1px solid var(--line);border-radius:16px;background:rgba(18,25,50,.62);color:white;scroll-snap-align:start;transition:transform .2s,border-color .2s,background .2s}
.category-tile::after{content:"";position:absolute;width:84px;height:84px;right:-38px;top:-35px;border-radius:50%;background:var(--cat-color);filter:blur(34px);opacity:.28}
.category-tile:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.24)}
.category-tile.active{border-color:color-mix(in srgb,var(--cat-color) 62%,white 12%);background:rgba(255,255,255,.085);box-shadow:0 12px 34px rgba(0,0,0,.13)}
.category-mark{position:relative;z-index:1;width:35px;height:35px;border-radius:11px;display:grid;place-items:center;background:color-mix(in srgb,var(--cat-color) 15%,transparent);border:1px solid color-mix(in srgb,var(--cat-color) 40%,transparent);color:var(--cat-color);font:800 .65rem var(--head)}
.category-name{position:relative;z-index:1;display:block;font-weight:800;font-size:.75rem;margin-top:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.category-count{position:absolute;right:11px;bottom:12px;color:#69748f;font-size:.6rem;font-weight:800}
.catalog-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.catalog-course{position:relative;overflow:hidden;display:flex;flex-direction:column;min-width:0;border:1px solid rgba(255,255,255,.12);border-radius:20px;background:linear-gradient(180deg,rgba(20,28,56,.9),rgba(14,21,43,.94));box-shadow:0 16px 44px rgba(0,0,0,.14),inset 0 1px 0 rgba(255,255,255,.025);transition:transform .23s,border-color .23s,box-shadow .23s;animation:courseIn .38s both}
.catalog-course:hover{transform:translateY(-5px);border-color:rgba(169,141,255,.38);box-shadow:0 26px 62px rgba(0,0,0,.28)}
.catalog-course.is-published{border-color:rgba(56,217,197,.24)}
.course-cover{position:relative;aspect-ratio:16/9;height:auto;padding:14px;display:flex;align-items:flex-end;background:linear-gradient(var(--cover-gradient));overflow:hidden}
.course-cover::before{content:"";position:absolute;width:122px;height:122px;right:-28px;top:-28px;border-radius:50%;background:rgba(255,255,255,.13);filter:blur(1px)}
.course-cover::after{content:attr(data-code);position:absolute;right:20px;top:31px;width:68px;height:82px;border-radius:11px;display:grid;place-items:center;background:rgba(7,11,24,.38);border:1px solid rgba(255,255,255,.24);box-shadow:-12px 17px 34px rgba(0,0,0,.22);transform:rotate(5deg);font:800 1.05rem var(--head);letter-spacing:.03em}
.course-cover-image{position:absolute;inset:0;z-index:1;width:100%;height:100%;display:block;object-fit:cover;transition:transform .42s cubic-bezier(.2,.75,.2,1),filter .3s ease}
.catalog-course:hover .course-cover-image{transform:scale(1.035);filter:saturate(1.06)}
.course-cover.has-image::before{inset:0;z-index:2;width:auto;height:auto;border-radius:0;filter:none;background:linear-gradient(180deg,rgba(7,11,24,.3),transparent 42%,rgba(7,11,24,.72) 100%)}
.course-cover.has-image::after{display:none}
.course-cover-top{position:absolute;top:12px;left:12px;right:12px;display:flex;justify-content:space-between;align-items:center;z-index:3}
.course-category{border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:5px 8px;background:rgba(7,11,24,.62);backdrop-filter:blur(14px);font-size:.58rem;font-weight:900;max-width:74%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.course-status{border:1px solid rgba(56,217,197,.36);border-radius:999px;padding:5px 7px;background:rgba(7,11,24,.54);color:#8fe9db;font-size:.55rem;font-weight:900}
.course-cover small{position:relative;z-index:3;color:rgba(255,255,255,.8);font-size:.58rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em}
.course-body{display:flex;flex-direction:column;flex:1;padding:16px}
.course-title{font:800 .92rem var(--head);line-height:1.2;margin:0 0 7px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.2em}
.course-desc{color:var(--muted);font-size:.71rem;line-height:1.45;margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.9em}
.course-meta{display:flex;gap:6px;flex-wrap:wrap;margin:12px 0}
.course-meta span{border:1px solid rgba(255,255,255,.08);border-radius:8px;padding:5px 7px;background:rgba(0,0,0,.13);color:#8994af;font-size:.57rem;font-weight:800}
.course-meta .lang{color:#d8d0ff}
.course-card-foot{margin-top:auto;padding-top:12px;border-top:1px solid rgba(255,255,255,.07)}
.buyer-price-row,.seller-price-row{display:flex;align-items:center;justify-content:space-between;gap:8px}
.buyer-price{font:800 1.15rem var(--head);color:var(--gold)}
.course-actions{display:flex;gap:7px;margin-top:10px}
.course-actions .course-btn{flex:1}
.course-btn{min-height:38px;border:1px solid var(--line);border-radius:11px;padding:8px 10px;background:var(--glass);color:white;font:800 .68rem var(--body);cursor:pointer;transition:background .18s,border-color .18s,transform .18s}
.course-btn:hover{border-color:rgba(255,255,255,.25);background:rgba(255,255,255,.1)}
.course-btn.primary{border:0;background:linear-gradient(135deg,var(--violet),#945fff 58%,var(--coral));box-shadow:0 9px 22px rgba(124,92,255,.22)}
.course-btn.published{color:#8fe9db;border-color:rgba(56,217,197,.35);background:rgba(56,217,197,.1)}
.seller-price-row label{color:#77829e;font-size:.58rem;font-weight:900;text-transform:uppercase;letter-spacing:.05em}
.seller-price-input{width:92px;height:36px;border:1px solid var(--line);border-radius:9px;background:rgba(5,9,20,.52);color:white;padding:0 9px;font-weight:800;outline:none}
.seller-price-input:focus{border-color:var(--violet2)}
.seller-save-state{min-height:15px;margin-top:6px;color:var(--teal);font-size:.59rem;font-weight:800}
.favorite-btn{position:absolute;top:12px;right:12px;z-index:4;width:31px;height:31px;border:1px solid rgba(255,255,255,.2);border-radius:10px;background:rgba(7,11,24,.52);color:white;backdrop-filter:blur(12px);font-size:.9rem}
.favorite-btn.saved{color:var(--coral);border-color:rgba(255,110,138,.4)}
.catalog-empty{display:none;text-align:center;padding:48px 20px;border:1px dashed var(--line-b);border-radius:20px;color:var(--muted)}
.catalog-empty.show{display:block}
.catalog-empty b{display:block;color:white;font:800 1rem var(--head);margin-bottom:6px}
.catalog-more-wrap{text-align:center;padding:22px 0 8px}
.catalog-more{border:1px solid var(--line-b);border-radius:12px;padding:11px 20px;background:var(--glass);color:white;font-weight:800}
.catalog-more[hidden]{display:none}
.selection-dock{position:sticky;bottom:14px;z-index:15;display:flex;align-items:center;justify-content:space-between;gap:18px;max-width:780px;margin:24px auto 0;padding:12px 14px 12px 18px;border:1px solid rgba(56,217,197,.25);border-radius:17px;background:rgba(9,15,31,.9);backdrop-filter:blur(22px);box-shadow:0 20px 55px rgba(0,0,0,.35)}
.selection-stats{display:flex;gap:20px;align-items:center}
.selection-stat b{display:block;font:800 1.02rem var(--head)}
.selection-stat span{display:block;color:#78839f;font-size:.55rem;font-weight:900;text-transform:uppercase;letter-spacing:.06em}
.selection-note{color:var(--muted);font-size:.66rem;margin-left:auto}
.catalog-modal{width:min(680px,calc(100% - 28px));border:1px solid rgba(255,255,255,.15);border-radius:24px;padding:0;background:#0c1226;color:white;box-shadow:0 34px 100px rgba(0,0,0,.66)}
.catalog-modal::backdrop{background:rgba(2,5,13,.75);backdrop-filter:blur(7px)}
.modal-cover{aspect-ratio:16/9;min-height:190px;padding:20px;display:flex;align-items:end;border-radius:23px 23px 0 0;background:linear-gradient(var(--cover-gradient));position:relative;overflow:hidden}
.modal-cover::after{content:attr(data-code);position:absolute;right:32px;top:26px;width:85px;height:100px;border-radius:13px;background:rgba(7,11,24,.4);border:1px solid rgba(255,255,255,.25);display:grid;place-items:center;font:800 1.25rem var(--head);transform:rotate(5deg)}
.modal-cover-image{position:absolute;inset:0;z-index:1;width:100%;height:100%;object-fit:cover;display:block}
.modal-cover.has-image::before{content:"";position:absolute;inset:0;z-index:2;background:linear-gradient(180deg,rgba(7,11,24,.18),transparent 45%,rgba(7,11,24,.7))}
.modal-cover.has-image::after{display:none}
.modal-cover.has-image .course-category{position:relative;z-index:3}
.modal-body{padding:22px}
.modal-body h2{font-size:1.4rem;margin-bottom:8px}
.modal-body>p{color:var(--muted);font-size:.82rem;line-height:1.55}
.modal-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:18px 0}
.modal-facts div{padding:10px;border:1px solid var(--line);border-radius:11px;background:var(--glass)}
.modal-facts span{display:block;color:#72809d;font-size:.55rem;font-weight:900;text-transform:uppercase}
.modal-facts b{display:block;font-size:.7rem;margin-top:4px}
.modal-actions{display:flex;justify-content:flex-end;gap:8px}
.modal-close{border:1px solid var(--line);border-radius:10px;background:var(--glass);color:white;padding:10px 14px;font-weight:800}
@keyframes courseIn{from{opacity:0;transform:translateY(9px)}to{opacity:1;transform:none}}
@media(max-width:1100px){.catalog-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.catalog-hero{grid-template-columns:1fr}.catalog-proof{max-width:420px}}
@media(max-width:780px){.catalog-page .wrap{padding-left:14px;padding-right:14px}.catalog-hero{padding:22px 18px;border-radius:21px}.catalog-hero h1{font-size:2.25rem}.catalog-proof{grid-template-columns:repeat(3,1fr);width:100%}.catalog-command{top:5px;margin-left:-4px;margin-right:-4px}.catalog-filter-toggle{padding:0 12px}.catalog-shortcut{display:none}.catalog-search{padding-right:14px}.catalog-filter-panel{display:grid;grid-template-columns:1fr 1fr;align-items:end}.catalog-filter-panel.open{max-height:330px}.catalog-field{min-width:0}.catalog-clear{grid-column:1/-1}.category-rail{display:flex;margin-left:-14px;margin-right:-14px;padding-left:14px;padding-right:14px}.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.selection-note{display:none}.modal-facts{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.topbar{padding-left:14px;padding-right:14px}.brand-name{font-size:.8rem}.catalog-hero h1{font-size:1.85rem}.catalog-proof div{padding:10px 5px}.catalog-proof b{font-size:1rem}.catalog-proof span{font-size:.5rem}.catalog-command-row{align-items:stretch}.catalog-filter-toggle{width:74px;padding:0 8px;font-size:.64rem}.catalog-grid{grid-template-columns:1fr}.catalog-section-head{align-items:start}.catalog-section-head p{max-width:240px}.selection-dock{bottom:8px;border-radius:15px;padding:11px}.selection-stats{gap:12px}.selection-stat:nth-child(3){display:none}.category-tile{min-width:145px}.modal-cover{min-height:0}.modal-body{padding:18px}.modal-actions{flex-direction:column}.modal-actions>*{width:100%}}
@media(prefers-reduced-motion:reduce){.catalog-course,.category-tile,.catalog-filter-panel,.catalog-search,.course-btn{animation:none!important;transition:none!important;scroll-behavior:auto!important}}