/* ==========================================================================
   store_designed.css -- the student store drawn from a store design
   (course_mgmt/store_designer.py, course_mgmt/student/store_designed.html).

   The root (#sd) carries one class per part of the design:
     sd--menu-{line|rail|timeline|icons|colour|dark|spotlight|none}
     sd--card-{classic|detailed|row|compact|poster}
     sd--banner-{featured|brand|plain|images|none}
     sd--head-{line|pill|band|sticky}
     sd--cols-{2|3|4}
   and its accent colours as custom properties, set by the template. Every class is
   prefixed sd- so nothing here meets Bootstrap's .card, .badge and friends, and the
   site's global rules (forms.css positions every <label> absolutely) are undone
   where the store uses those elements.
   ========================================================================== */

.sd{
  --sd-accent:#044FC0; --sd-accent-text:#044FC0; --sd-accent-dark:#033D96; --sd-accent-soft:#E9F0FC;
  --sd-accent-line:#C9DAF6; --sd-accent-ink:#fff; --sd-deep:#211E63; --sd-hl:#FFC733;
  --sd-green:#198754; --sd-green-dk:#146C43; --sd-green-lt:#E7F5EE; --sd-amber:#8A5300; --sd-amber-lt:#FFF3D6;
  --sd-ink:#1F2433; --sd-ink2:#4A5163; --sd-muted:#6B7280; --sd-line:#E5E8EE; --sd-line2:#D1D5DB;
  --sd-page:#F6F7FB; --sd-surface:#fff; --sd-surface2:#F1F3F7; --sd-thumb:#EEF1F6;
  --sd-f-head:"Lato","Helvetica Neue",Arial,sans-serif;
  --sd-f-body:"Open Sans",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --sd-sh:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
  --sd-sh-up:0 12px 28px -10px rgba(16,24,40,.22),0 2px 6px rgba(16,24,40,.06);
  --sd-cc:var(--sd-accent); --sd-cc-text:var(--sd-accent-text); --sd-cc-soft:var(--sd-accent-soft); --sd-cc-ink:var(--sd-accent-ink);
  --sd-tbh:0px;
  background:var(--sd-page);color:var(--sd-ink);font:15px/1.5 var(--sd-f-body);-webkit-font-smoothing:antialiased;
  min-height:70vh;
}
.sd *,.sd *::before,.sd *::after{box-sizing:border-box}
/* a category's own colour: the template sets --sd-cc, --sd-cc-ink and day (t, s) and night (nt, ns) text and tint */
.sd [data-cc]{--sd-cc-text:var(--sd-cc-t);--sd-cc-soft:var(--sd-cc-s)}
.sd [hidden]{display:none!important}
.sd :where(a){color:inherit;text-decoration:none}
.sd :where(button){font:inherit;color:inherit}
.sd :where(img){max-width:100%;display:block}
.sd :where(h1,h2,h3,p,dl,dd,ul){margin:0}
.sd :where(ul){padding:0;list-style:none}
.sd :where(label){position:static;top:auto;font-size:inherit;color:inherit;transition:none;display:inline}
.sd :focus-visible{outline:2px solid var(--sd-accent);outline-offset:2px}
.sd-vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.sd-wrap{max-width:1280px;margin-inline:auto;padding-inline:24px}
@media (max-width:600px){.sd-wrap{padding-inline:16px}}

/* preview ribbon (store designer only) */
.sd-ribbon{background:#111827;color:#E5E7EB;font:13.5px/1.4 var(--sd-f-body,system-ui);padding:9px 16px;text-align:center}
.sd-ribbon a{color:#fff;font-weight:600;text-decoration:underline;margin-left:6px}

/* ---------- title band ---------- */
.sd-top{background:var(--sd-surface);border-bottom:1px solid var(--sd-line)}
.sd-top-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px 24px;padding-block:26px 24px}
.sd-top h1{font:700 30px/1.2 var(--sd-f-head);color:var(--sd-ink)}
.sd-sub{margin-top:4px;color:var(--sd-muted);font-size:14.5px}
.sd-sub b{color:var(--sd-ink);font-weight:600}
.sd--banner-brand .sd-top{background:var(--sd-accent);border-bottom:0;color:var(--sd-accent-ink)}
.sd--banner-brand .sd-top-in{padding-block:36px 38px}
.sd--banner-brand .sd-top h1{font-size:36px;font-weight:900;color:inherit}
.sd--banner-brand .sd-sub{color:inherit;opacity:.85}
.sd--banner-brand .sd-sub b{color:inherit}
.sd--banner-none .sd-top{background:transparent;border-bottom:0}
.sd--banner-none .sd-top-in{padding-block:22px 4px}
.sd--banner-none .sd-top h1{font-size:24px}
@media (max-width:600px){.sd-top h1{font-size:26px}.sd--banner-brand .sd-top h1{font-size:28px}}

/* ---------- featured slider ---------- */
.sd-hero{margin-top:24px}
.sd-hero-card{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:28px;align-items:center;background:var(--sd-deep);color:#fff;border-radius:16px;padding:28px;overflow:hidden}
.sd-hero-k{margin:0 0 10px;font-size:13.5px;color:rgba(255,255,255,.75)}
.sd-hero-k b{color:var(--sd-hl);font-weight:700}
.sd-hero-t{font:900 clamp(24px,2.6vw,32px)/1.2 var(--sd-f-head);color:#fff}
.sd-hero-m{margin-top:12px;color:rgba(255,255,255,.82);font-size:14.5px}
.sd-hero-p{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin-top:16px}
.sd-hero-p .sd-now{font:900 28px/1 var(--sd-f-head);color:#fff}
.sd-hero-p s{color:rgba(255,255,255,.6)}
.sd-hero-p .sd-gst{color:rgba(255,255,255,.75);font-size:13.5px}
.sd-hero-b{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.sd-btn-y{background:var(--sd-hl);color:#1F1A00;font-weight:700;border-radius:8px;padding:11px 22px}
.sd-btn-y:hover{background:#FFD45C}
.sd-btn-o{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45);border-radius:8px;padding:10px 18px;font-weight:600;cursor:pointer}
.sd-btn-o:hover{border-color:#fff}
.sd-hero-img{display:block;border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:rgba(255,255,255,.08);box-shadow:0 18px 40px -16px rgba(0,0,0,.5)}
.sd-hero-img img{width:100%;height:100%;object-fit:contain}
.sd-hero-nav{display:flex;align-items:center;gap:12px;margin-top:20px}
.sd-arr{width:36px;height:36px;border-radius:50%;border:1.5px solid rgba(255,255,255,.4);background:transparent;color:#fff;cursor:pointer;font-size:18px;line-height:1;display:grid;place-items:center;padding:0}
.sd-arr:hover{border-color:#fff}
.sd-dots{display:flex;flex-wrap:wrap;gap:6px}
.sd-dots button{width:8px;height:8px;border-radius:999px;border:0;padding:0;background:rgba(255,255,255,.35);cursor:pointer;transition:width .25s,background-color .25s}
.sd-dots button[aria-current="true"]{width:22px;background:var(--sd-hl)}
.sd-fade{animation:sdIn .45s ease both}
@keyframes sdIn{from{opacity:.25}to{opacity:1}}

/* your banners */
.sd-slides{margin-top:24px;position:relative;border-radius:16px;overflow:hidden;background:var(--sd-thumb)}
.sd-slide{display:block}
.sd-slide img{width:100%;height:auto;max-height:560px;object-fit:contain}
.sd-slides .sd-hero-nav{position:absolute;left:0;right:0;bottom:12px;justify-content:center;margin:0}
.sd-slides .sd-arr{background:rgba(17,24,39,.45);border-color:rgba(255,255,255,.6)}
@media (max-width:600px){
  /* small banners: dots under the picture, swipe instead of arrows, nothing over the banner's text */
  .sd-slides{background:var(--sd-surface)}
  .sd-slides .sd-hero-nav{position:static;padding:8px 0}
  .sd-slides .sd-arr{display:none}
  .sd-slides .sd-dots button{background:var(--sd-line2)}
  .sd-slides .sd-dots button[aria-current="true"]{background:var(--sd-accent)}
}

/* ---------- toolbar: search, quick filters and sort, stuck to the top ---------- */
.sd-tb-sentinel{height:1px;margin-top:-1px}
.sd-tbar{position:sticky;top:0;z-index:20;padding-block:12px;background:var(--sd-page);transition:box-shadow .2s}
.sd-tbar.stuck{box-shadow:0 10px 18px -14px rgba(16,24,40,.4)}
.sd-toolbar{display:flex;align-items:center;gap:10px 14px;padding:12px;background:var(--sd-surface);border-radius:12px;box-shadow:var(--sd-sh)}
.sd .sd-search{display:flex;align-items:center;gap:8px;border:1px solid var(--sd-line2);border-radius:8px;padding:0 12px;height:44px;flex:1 1 300px;min-width:0;background:var(--sd-surface);color:var(--sd-muted);cursor:text}
.sd-search input{border:0;outline:0;flex:1;font:inherit;font-size:15px;min-width:0;background:none;color:var(--sd-ink);height:100%}
.sd-search:focus-within{border-color:var(--sd-accent);box-shadow:0 0 0 3px var(--sd-accent-line)}
.sd-fchips{display:flex;gap:6px;flex:0 1 auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.sd-fchips::-webkit-scrollbar{display:none}
.sd-fchip{flex:none;border:1px solid var(--sd-line2);background:var(--sd-surface);border-radius:999px;padding:6px 12px;font-size:13.5px;cursor:pointer;color:var(--sd-ink2);white-space:nowrap}
.sd-fchip:hover{border-color:var(--sd-accent);color:var(--sd-accent-text)}
.sd-fchip[aria-pressed="true"]{background:var(--sd-accent);border-color:var(--sd-accent);color:var(--sd-accent-ink);font-weight:600}
.sd-fchip span{opacity:.75;margin-left:4px;font-size:12.5px}
.sd-fchip.empty{display:none}
.sd .sd-sel{display:flex;align-items:center;flex:none}
.sd-sel select{height:44px;border:1px solid var(--sd-line2);border-radius:8px;background:var(--sd-surface);padding:0 12px;font:inherit;font-size:14px;color:var(--sd-ink);min-width:190px;cursor:pointer}
.sd-sel select:focus{border-color:var(--sd-accent);outline:0}
.sd-fbtn{display:none;align-items:center;gap:7px;height:44px;padding:0 14px;border:1px solid var(--sd-line2);border-radius:8px;background:var(--sd-surface);font-weight:600;font-size:14px;cursor:pointer;flex:none}
.sd-fbadge{background:var(--sd-accent);color:var(--sd-accent-ink);border-radius:999px;font-size:11.5px;min-width:19px;height:19px;display:inline-grid;place-items:center;padding:0 5px;line-height:1}
.sd-results{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px;margin:0 0 18px;font-size:14px;color:var(--sd-muted)}
.sd-results b{color:var(--sd-ink)}
.sd-clear{border:0;background:none;color:var(--sd-accent-text);font-weight:600;cursor:pointer;font-size:14px;padding:0;text-decoration:underline;text-underline-offset:3px}
@media (max-width:1279px){.sd-toolbar{flex-wrap:wrap}.sd-fchips{order:3;flex:1 1 100%;flex-wrap:wrap}}
@media (max-width:900px){
  .sd-tbar{padding-block:10px}
  .sd-toolbar{flex-wrap:nowrap;padding:8px;gap:8px}
  .sd .sd-search{flex:1 1 auto}
  .sd-fchips,.sd .sd-sel{display:none}
  .sd-fbtn{display:inline-flex;margin-left:auto}
}
@media (max-width:380px){.sd-fbtn .sd-ftx{display:none}}

/* filter sheet on phones */
.sd-scrim{position:fixed;inset:0;background:rgba(17,24,39,.45);z-index:1060}
.sd-sheet{position:fixed;left:0;right:0;bottom:0;z-index:1061;background:var(--sd-surface);border-radius:16px 16px 0 0;padding:16px 16px calc(16px + env(safe-area-inset-bottom,0px));max-height:85vh;overflow:auto;box-shadow:0 -10px 30px rgba(0,0,0,.2)}
.sd-sheet-h{display:flex;justify-content:space-between;align-items:center;gap:12px}
.sd-sheet-h h3{font:700 18px var(--sd-f-head)}
.sd-x{width:36px;height:36px;border-radius:50%;border:1px solid var(--sd-line2);background:var(--sd-surface);cursor:pointer;font-size:18px;line-height:1}
.sd-sheet-l{margin:18px 0 8px;font-weight:600;font-size:14px}
.sd-sheet-chips{display:flex;flex-wrap:wrap;gap:8px}
.sd-sheet-sorts{display:grid;gap:6px}
.sd-sopt{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--sd-line2);border-radius:8px;padding:11px 12px;background:var(--sd-surface);font-size:14.5px;cursor:pointer;text-align:left}
.sd-sopt[aria-pressed="true"]{border-color:var(--sd-accent);color:var(--sd-accent-text);font-weight:600;background:var(--sd-accent-soft)}
.sd-sheet-f{display:flex;gap:10px;margin-top:20px}
.sd-sheet-f button{flex:1;height:46px;border-radius:8px;font-weight:600;cursor:pointer;font-size:15px}
.sd-sheet-f .sd-ghost{background:var(--sd-surface);border:1px solid var(--sd-line2)}
.sd-sheet-f .sd-primary{background:var(--sd-accent);border:0;color:var(--sd-accent-ink)}

/* ---------- page layout ---------- */
.sd-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:36px;padding-block:28px 80px}
.sd--menu-none .sd-layout{display:block}
.sd-side{position:sticky;top:calc(var(--sd-tbh) + 16px);align-self:start;max-height:calc(100vh - var(--sd-tbh) - 32px);overflow:auto;padding-bottom:4px;scrollbar-width:thin}
.sd-main{min-width:0}

/* category menu: the simple list is the base, the others restyle it */
.sd-cats-h{margin:0 0 8px;padding-left:16px;font:700 14px var(--sd-f-head);color:var(--sd-muted)}
.sd-cat-list{position:relative;border-left:2px solid var(--sd-line)}
.sd-ind{position:absolute;left:-2px;top:0;width:3px;height:0;background:var(--sd-accent);border-radius:2px;transition:transform .3s ease,height .3s ease}
.sd-cat{width:100%;display:flex;align-items:center;gap:10px;padding:9px 6px 9px 16px;border:0;background:none;text-align:left;cursor:pointer;font-size:15px;color:var(--sd-ink2);line-height:1.35;transition:color .15s,background-color .15s}
.sd-nm{flex:1;min-width:0}
.sd-n{font-size:12.5px;color:var(--sd-muted);flex:none}
.sd-cat-ic{display:none;flex:none;color:var(--sd-muted)}
.sd-cat-ic svg,.sd-sec-ic svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;display:block}
.sd-dot{display:none}
.sd-cat:hover{color:var(--sd-ink)}
.sd-cat.on{color:var(--sd-accent-text);font-weight:700}
.sd-cat.on .sd-n{color:var(--sd-accent-text)}
.sd-sub{display:none;margin:0 0 6px}
.sd-cat-li.open .sd-sub{display:block}
.sd-subcat{width:100%;display:flex;align-items:center;gap:8px;padding:6px 6px 6px 32px;border:0;background:none;text-align:left;cursor:pointer;font-size:14px;color:var(--sd-muted);line-height:1.35}
.sd-subcat span:first-child{flex:1;min-width:0}
.sd-subcat:hover,.sd-subcat.on{color:var(--sd-ink)}
.sd-subcat.on{font-weight:600}
.sd-appbox{margin-top:22px;margin-left:16px;padding:14px;border-radius:12px;background:var(--sd-surface);box-shadow:var(--sd-sh);font-size:13.5px;color:var(--sd-ink2)}
.sd-appbox b{display:block;font:700 15px var(--sd-f-head);color:var(--sd-ink);margin-bottom:4px}
.sd-appbox a{display:inline-block;margin-top:10px;font-weight:600;color:var(--sd-accent-text)}
.sd-appbox a:hover{text-decoration:underline}

/* rail: a white pill glides behind the current category */
.sd--menu-rail .sd-cat-list{border-left:0;display:grid;gap:2px}
.sd--menu-rail .sd-ind{left:0;width:100%;border-radius:10px;background:var(--sd-surface);box-shadow:var(--sd-sh);transition:transform .35s cubic-bezier(.25,.8,.25,1),height .35s cubic-bezier(.25,.8,.25,1)}
.sd--menu-rail .sd-cat{position:relative;z-index:1;padding:10px 12px;border-radius:10px}
.sd--menu-rail .sd-cat.on{color:var(--sd-ink)}
.sd--menu-rail .sd-cat.on .sd-n{color:var(--sd-accent-text)}
.sd--menu-rail .sd-cats-h{padding-left:12px}
.sd--menu-rail .sd-subcat{padding-left:28px;position:relative;z-index:1}
.sd--menu-rail .sd-appbox{margin-left:0}

/* timeline: a dot per category on a track that fills as you scroll */
.sd-rb{position:relative}
.sd--menu-timeline .sd-cats-h{padding-left:24px}
.sd--menu-timeline .sd-cat-list{border-left:0;padding-left:24px}
.sd--menu-timeline .sd-ind{display:none}
.sd-track{position:absolute;left:7px;top:34px;bottom:12px;width:2px;background:var(--sd-line2);border-radius:2px}
.sd-track i{display:block;width:100%;height:calc(var(--sd-gp,0) * 100%);background:var(--sd-accent);border-radius:2px}
.sd--menu-timeline .sd-cat{position:relative;padding:8px 4px 8px 0;font:700 15.5px/1.3 var(--sd-f-head);color:var(--sd-muted)}
.sd--menu-timeline .sd-cat::before{content:"";position:absolute;left:-22px;top:calc(50% - 5px);width:10px;height:10px;border-radius:50%;background:var(--sd-page);border:2px solid var(--sd-line2);transition:background-color .2s,border-color .2s,box-shadow .2s}
.sd--menu-timeline .sd-cat:hover,.sd--menu-timeline .sd-cat.on{color:var(--sd-ink)}
.sd--menu-timeline .sd-cat.on::before{background:var(--sd-accent);border-color:var(--sd-accent);box-shadow:0 0 0 4px var(--sd-accent-soft)}
.sd--menu-timeline .sd-subcat{padding-left:12px}
.sd--menu-timeline .sd-appbox{margin-left:24px}

/* icons: an icon beside each category, the current one tinted */
.sd--menu-icons .sd-cat-ic{display:block}
.sd--menu-icons .sd-cat{border-radius:0 8px 8px 0;padding-left:14px}
.sd--menu-icons .sd-cat.on{background:var(--sd-accent-soft)}
.sd--menu-icons .sd-cat.on .sd-cat-ic{color:var(--sd-accent-text)}
.sd--menu-icons .sd-subcat{padding-left:44px}

/* colour-coded: every category its own colour */
.sd--menu-colour .sd-cat-list{border-left:0;display:grid;gap:2px}
.sd--menu-colour .sd-ind{display:none}
.sd--menu-colour .sd-cat{border-radius:9px;padding:9px 10px;font-weight:600}
.sd--menu-colour .sd-dot{display:block;width:12px;height:12px;border-radius:4px;background:var(--sd-cc);flex:none}
.sd--menu-colour .sd-cat:hover{background:var(--sd-surface)}
.sd--menu-colour .sd-cat.on{background:var(--sd-cc-soft);color:var(--sd-cc-text)}
.sd--menu-colour .sd-cat.on .sd-n{color:var(--sd-cc-text)}
.sd--menu-colour .sd-cats-h{padding-left:10px}
.sd--menu-colour .sd-subcat{padding-left:32px}
.sd--menu-colour .sd-appbox{margin-left:0}

/* dark app sidebar: full height beside everything else */
.sd-shell{min-width:0}
.sd--menu-dark .sd-shell{display:grid;grid-template-columns:264px minmax(0,1fr);align-items:start}
.sd-body{min-width:0}
.sd-dside{position:sticky;top:0;height:100vh;overflow:auto;background:var(--sd-deep);color:rgba(255,255,255,.8);padding:22px 14px 20px;display:flex;flex-direction:column;gap:16px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent}
.sd-dside .sd-cats-h{color:rgba(255,255,255,.6);padding-left:10px}
.sd-dside .sd-cat-list{border-left:0;display:grid;gap:2px}
.sd-dside .sd-ind{display:none}
.sd-dside .sd-cat{color:rgba(255,255,255,.8);border-radius:9px;padding:9px 10px}
.sd-dside .sd-cat-ic{display:block;color:rgba(255,255,255,.55)}
.sd-dside .sd-n{color:rgba(255,255,255,.55)}
.sd-dside .sd-cat:hover{color:#fff;background:rgba(255,255,255,.07)}
.sd-dside .sd-cat.on{background:rgba(255,255,255,.13);color:#fff}
.sd-dside .sd-cat.on .sd-cat-ic{color:var(--sd-hl)}
.sd-dside .sd-cat.on .sd-n{color:#fff}
.sd-dside .sd-subcat{color:rgba(255,255,255,.6);padding-left:40px}
.sd-dside .sd-subcat:hover,.sd-dside .sd-subcat.on{color:#fff}
.sd-dside .sd-appbox{margin:auto 0 0;background:rgba(255,255,255,.08);box-shadow:none;color:rgba(255,255,255,.75)}
.sd-dside .sd-appbox b{color:#fff}
.sd-dside .sd-appbox a{color:var(--sd-hl)}
.sd--menu-dark .sd-wrap{max-width:none;padding-inline:28px}
.sd--menu-dark .sd-layout{display:block}
.sd-crumbs{display:none;font-size:14px;color:var(--sd-muted);margin:0 0 4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sd-crumbs b{color:var(--sd-ink);font-weight:600}
.sd-crumbs i{font-style:normal;margin-inline:8px;color:var(--sd-line2)}
.sd--menu-dark .sd-crumbs{display:block}
@media (min-width:901px) and (max-width:1599px){.sd--menu-dark .sd-toolbar{flex-wrap:wrap}.sd--menu-dark .sd-fchips{order:3;flex:1 1 100%;flex-wrap:wrap}}

/* spotlight: a coloured panel about the category you are in */
.sd--menu-spotlight .sd-layout{grid-template-columns:minmax(290px,.75fr) minmax(0,1.6fr);gap:32px}
.sd-spot{background:var(--sd-cc,var(--sd-deep));color:var(--sd-cc-ink,#fff);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:18px;transition:background-color .4s ease;scrollbar-width:none}
.sd-spot-k{font-size:13.5px;opacity:.8}
.sd-spot-n{font:900 32px/1.1 var(--sd-f-head);margin-top:4px;color:inherit}
.sd-spot-s{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;border-top:1px solid rgba(255,255,255,.25);border-top:1px solid color-mix(in srgb,currentColor 25%,transparent);padding-top:14px;margin-top:16px}
.sd-spot-s b{display:block;font:700 21px/1.15 var(--sd-f-head)}
.sd-spot-s span{font-size:12.5px;opacity:.8}
.sd-spot-next{display:grid;gap:3px;margin-top:16px;background:rgba(255,255,255,.12);background:color-mix(in srgb,currentColor 12%,transparent);border-radius:10px;padding:12px 14px}
.sd-spot-next span{font-size:12.5px;opacity:.8}
.sd-spot-next b{font:700 15px/1.35 var(--sd-f-head)}
.sd-spot-next:hover{background:rgba(255,255,255,.2);background:color-mix(in srgb,currentColor 20%,transparent)}
.sd-spot-list{border-top:1px solid rgba(255,255,255,.25);border-top:1px solid color-mix(in srgb,currentColor 25%,transparent);padding-top:12px}
.sd-spot .sd-cats-h{color:inherit;opacity:.7;padding-left:0}
.sd-spot .sd-cat-list{border-left:0;display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.sd-spot .sd-ind,.sd-spot .sd-sub{display:none}
.sd-spot .sd-cat{color:inherit;opacity:.8;padding:6px 0;font-size:14px}
.sd-spot .sd-n{color:inherit}
.sd-spot .sd-cat:hover,.sd-spot .sd-cat.on{opacity:1}
.sd-spot .sd-cat.on{font-weight:700}

/* category chips: phones always; every width when there is no side menu */
.sd-chips{display:none;gap:8px;overflow-x:auto;position:sticky;top:var(--sd-tbh);z-index:15;background:var(--sd-surface);margin:0 -24px 18px;padding:10px 24px;border-bottom:1px solid var(--sd-line);scrollbar-width:none}
.sd-chips::-webkit-scrollbar{display:none}
.sd-chip{flex:none;border:1px solid var(--sd-accent);color:var(--sd-accent-text);background:var(--sd-surface);border-radius:999px;padding:6px 14px;white-space:nowrap;font-size:14px;cursor:pointer}
.sd-chip span{opacity:.7;font-size:12.5px}
.sd-chip.on{background:var(--sd-accent);color:var(--sd-accent-ink)}
.sd--menu-colour .sd-chip.on{background:var(--sd-cc);border-color:var(--sd-cc);color:var(--sd-cc-ink)}
.sd--menu-none .sd-chips{display:flex;margin-inline:0;border:0;border-radius:12px;box-shadow:var(--sd-sh);padding-inline:12px;margin-bottom:22px}

/* ---------- sections and their headings ---------- */
.sd-sec{scroll-margin-top:calc(var(--sd-tbh) + 16px)}
.sd-sec + .sd-sec{margin-top:44px}
.sd-sec.gone,.sd-grp.gone,.sd-cat-li.gone,.sd-chip.gone,.sd-subli.gone{display:none}
.sd-sec-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.sd-sec-head::after{content:"";flex:1;height:1px;background:var(--sd-line2);opacity:.7}
.sd-sec-ic{display:none;width:38px;height:38px;border-radius:10px;background:var(--sd-accent-soft);color:var(--sd-accent-text);place-items:center;flex:none}
.sd-sec-head h2{font:700 23px/1.25 var(--sd-f-head);color:var(--sd-ink)}
.sd-sec-n{color:var(--sd-muted);font-size:14px;white-space:nowrap}
.sd--menu-icons .sd-sec-ic,.sd--menu-dark .sd-sec-ic{display:grid}
.sd--head-pill .sd-sec-n{background:var(--sd-accent-soft);color:var(--sd-accent-text);padding:2px 10px;border-radius:999px;font-weight:600;font-size:13px}
.sd--head-band .sd-sec-head{background:var(--sd-cc);color:var(--sd-cc-ink);border-radius:12px;padding:14px 18px}
.sd--head-band .sd-sec-head::after{display:none}
.sd--head-band .sd-sec-head h2{color:inherit;font-size:21px}
.sd--head-band .sd-sec-n{color:inherit;opacity:.88}
.sd--head-band .sd-sec-ic{display:grid;background:rgba(255,255,255,.16);background:color-mix(in srgb,currentColor 16%,transparent);color:inherit}
.sd--head-sticky .sd-sec-head{position:sticky;top:var(--sd-tbh);z-index:5;background:var(--sd-page);background:color-mix(in srgb,var(--sd-page) 94%,transparent);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);margin:0 -12px 16px;padding:12px;border-bottom:1px solid var(--sd-line)}
.sd--head-sticky .sd-sec-head::after{display:none}
.sd--menu-dark.sd--head-sticky .sd-sec-head{margin-inline:-28px;padding-inline:28px}
.sd-grp + .sd-grp{margin-top:28px}
.sd-grp{scroll-margin-top:calc(var(--sd-tbh) + 16px)}
.sd-grp-h{display:flex;align-items:baseline;gap:10px;font:700 17px/1.3 var(--sd-f-head);color:var(--sd-ink2);margin:0 0 14px}
.sd-grp-h span{font:400 13px var(--sd-f-body);color:var(--sd-muted)}

/* ---------- course grids ---------- */
.sd-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.sd--cols-2 .sd-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.sd--cols-4 .sd-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
@media (max-width:1240px){.sd--cols-4:not(.sd--menu-none) .sd-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:1360px){.sd--menu-dark.sd--cols-4 .sd-grid,.sd--menu-spotlight .sd-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:1100px){.sd--menu-spotlight .sd-grid{grid-template-columns:1fr}}
@media (min-width:1361px){.sd--menu-spotlight.sd--cols-3 .sd-grid,.sd--menu-spotlight.sd--cols-4 .sd-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:1040px){.sd-grid,.sd--cols-4 .sd-grid,.sd--cols-4:not(.sd--menu-none) .sd-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.sd-grid,.sd--cols-2 .sd-grid,.sd--cols-4 .sd-grid,.sd--cols-4:not(.sd--menu-none) .sd-grid{grid-template-columns:1fr}
  .sd--card-compact .sd-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}}
.sd-empty{padding:48px 20px;text-align:center;color:var(--sd-ink2);border:1px dashed var(--sd-line2);border-radius:12px;background:var(--sd-surface)}
.sd-empty h3{font:700 18px var(--sd-f-head);margin:0 0 6px;color:var(--sd-ink)}
.sd-empty button{margin-top:12px;border:1px solid var(--sd-line2);background:var(--sd-surface);border-radius:6px;padding:8px 14px;cursor:pointer}

/* ---------- course card (classic) ---------- */
.sd-card{background:var(--sd-surface);display:flex;flex-direction:column;min-width:0;border-radius:12px;box-shadow:var(--sd-sh);overflow:hidden;transition:box-shadow .2s ease}
.sd-card:hover{box-shadow:var(--sd-sh-up)}
.sd-card-img{position:relative;display:block;aspect-ratio:16/9;background:var(--sd-thumb);overflow:hidden}
/* Course pictures usually carry their own text, so they are always shown whole (16:9 fills the
   box exactly; any other shape gets plain margins) and never cropped. */
.sd-card-img img{width:100%;height:100%;object-fit:contain}
.sd-card-img.noimg::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,var(--sd-accent-soft),var(--sd-thumb))}
.sd-badges{position:absolute;top:10px;left:10px;right:10px;z-index:1;display:flex;flex-wrap:wrap;gap:6px;pointer-events:none}
.sd-owned,.sd-pkg{font-size:12px;font-weight:600;border-radius:999px;padding:3px 10px;line-height:1.4}
.sd-owned{background:var(--sd-green);color:#fff}
.sd-pkg{background:rgba(255,255,255,.94);color:#1F2433;box-shadow:0 1px 3px rgba(16,24,40,.25)}
.sd-peek{display:none}
.sd-card-body{padding:14px 16px;display:flex;flex-direction:column;gap:11px;flex:1}
.sd-tags{display:flex;flex-wrap:wrap;gap:6px}
.sd-tag{padding:2px 8px;border-radius:4px;font-size:12px;font-weight:600;line-height:1.6;background:var(--sd-surface2);color:var(--sd-ink2)}
.sd-tag.soon{background:var(--sd-amber-lt);color:var(--sd-amber)}
.sd-tag.ongoing{background:var(--sd-green-lt);color:var(--sd-green-dk)}
.sd-tag.self{background:var(--sd-accent-soft);color:var(--sd-accent-text)}
.sd-tag.free{background:var(--sd-green-lt);color:var(--sd-green-dk)}
.sd-card-title{font:700 16px/1.35 var(--sd-f-head);color:var(--sd-ink)}
.sd-card-title a:hover{color:var(--sd-accent-text)}
.sd-dates{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.sd-dates .full{grid-column:1/-1}
.sd-dates dt{font-size:12.5px;color:var(--sd-muted);font-weight:400}
.sd-dates dd{font-size:14px;font-weight:600;color:var(--sd-ink)}
.sd-meta{font-size:13px;color:var(--sd-ink2)}
.sd-card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px;border-top:1px solid var(--sd-line);margin-top:auto}
.sd-price{display:flex;flex-wrap:wrap;align-items:baseline;gap:0 8px;min-width:0}
.sd-now{font:700 19px/1.25 var(--sd-f-head);color:var(--sd-ink)}
.sd-price s{color:var(--sd-muted);font-size:13px}
.sd-gst{color:var(--sd-muted);font-size:12.5px;flex-basis:100%}
.sd-save{display:none;color:var(--sd-green-dk);font-size:12.5px;font-weight:600;flex-basis:100%}
.sd-btn{flex:none;background:var(--sd-accent);color:var(--sd-accent-ink);border-radius:7px;padding:9px 16px;font-weight:600;font-size:14px;transition:background-color .15s;white-space:nowrap}
.sd-btn:hover{background:var(--sd-accent-dark);color:#fff}
.sd-btn.view{background:var(--sd-surface2);color:var(--sd-ink)}
.sd-btn.view:hover{background:var(--sd-line)}
.sd-btn.access{background:var(--sd-green);color:#fff}
.sd-btn.access:hover{background:var(--sd-green-dk)}

/* detailed: labels, saving and details over the image on hover */
.sd--card-detailed .sd-peek{display:block;position:absolute;inset:auto 0 0 0;padding:28px 14px 12px;background:linear-gradient(to top,rgba(17,24,39,.82),rgba(17,24,39,0));color:#fff;font-weight:600;font-size:13.5px;line-height:1.4;opacity:0;transform:translateY(6px);transition:opacity .2s,transform .2s}
.sd--card-detailed .sd-card:hover .sd-peek,.sd--card-detailed .sd-card-img:focus-visible .sd-peek{opacity:1;transform:none}
.sd--card-detailed .sd-save{display:block}
.sd--card-detailed .sd-gst{flex-basis:auto}
.sd--card-detailed .sd-btn.enroll{background:var(--sd-green);color:#fff}
.sd--card-detailed .sd-btn.enroll:hover{background:var(--sd-green-dk)}

/* compact */
.sd-card--compact .sd-card-body{padding:10px 12px;gap:6px}
.sd-card--compact .sd-card-title{font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sd-card--compact .sd-when{font-size:12.5px;color:var(--sd-muted)}
.sd-card--compact .sd-card-foot{padding:9px 12px}
.sd-card--compact .sd-now{font-size:16px}
.sd-card--compact .sd-gst{font-size:11.5px}
.sd-go{flex:none;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--sd-accent-soft);color:var(--sd-accent-text);font-size:18px;line-height:1}
.sd-go:hover{background:var(--sd-accent);color:var(--sd-accent-ink)}

/* poster */
.sd-poster{display:block;background:var(--sd-deep);color:#fff}
.sd-poster-pic{position:relative;display:block;aspect-ratio:16/9;background:rgba(255,255,255,.06);overflow:hidden}
.sd-poster-pic img{width:100%;height:100%;object-fit:contain}
.sd-poster-pic.noimg::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.12),rgba(255,255,255,.02))}
.sd-poster-in{display:grid;gap:8px;padding:14px 16px 16px}
.sd-poster:hover .sd-card-title{text-decoration:underline;text-underline-offset:3px}
.sd-poster-in .sd-card-title{color:#fff;font-size:18px}
.sd-poster-in .sd-when{font-size:13px;color:rgba(255,255,255,.82)}
.sd-poster .sd-tag{background:rgba(255,255,255,.18);color:#fff}

/* list rows */
.sd-rows{background:var(--sd-surface);border-radius:12px;box-shadow:var(--sd-sh)}
.sd-row{display:grid;grid-template-columns:184px minmax(0,1fr) auto;gap:14px 20px;align-items:center;padding:14px 16px}
.sd-row + .sd-row{border-top:1px solid var(--sd-line)}
.sd-row .sd-card-img{border-radius:8px}
.sd-row-main{min-width:0}
.sd-row-t{font:700 16px/1.35 var(--sd-f-head);color:var(--sd-ink)}
.sd-row-t a:hover{color:var(--sd-accent-text)}
.sd-row-d{margin-top:8px;font-size:13.5px;color:var(--sd-muted)}
.sd-row-d b{font-weight:600;color:var(--sd-ink)}
.sd-row-buy{display:grid;justify-items:end;gap:8px;text-align:right}
.sd-row-buy .sd-price{justify-content:flex-end}
@media (max-width:700px){
  .sd-row{grid-template-columns:112px minmax(0,1fr);gap:10px 12px;padding:12px}
  .sd-row-buy{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center;text-align:left}
  .sd-row-buy .sd-price{justify-content:flex-start}
  .sd-row-d{font-size:12.5px}
}

/* ---------- phones and small tablets ---------- */
@media (max-width:900px){
  .sd-layout{display:block;padding-top:0}
  .sd-side,.sd-dside{display:none}
  .sd--menu-dark .sd-shell{display:block}
  .sd--menu-dark .sd-wrap{padding-inline:24px}
  .sd-chips{display:flex}
  .sd--menu-none .sd-chips{margin-inline:-24px;border-radius:0;box-shadow:none;border-bottom:1px solid var(--sd-line);padding-inline:24px}
  .sd--menu-dark .sd-crumbs{display:none}
  .sd--head-sticky .sd-sec-head,.sd--menu-dark.sd--head-sticky .sd-sec-head{position:static;margin-inline:0;padding-inline:0;background:none;border-bottom:0;-webkit-backdrop-filter:none;backdrop-filter:none}
  .sd-hero-card{grid-template-columns:1fr;padding:20px}
  .sd-hero-imgs{order:-1}
}
@media (max-width:600px){
  .sd-chips,.sd--menu-none .sd-chips{margin-inline:-16px;padding-inline:16px}
  .sd--menu-dark .sd-wrap{padding-inline:16px}
}

/* ---------- dark theme (logged-in students who chose it; the app webview is always light) ---------- */
:root[data-theme="dark"] .sd{
  --sd-accent-text:var(--sd-accent-night);--sd-accent-soft:var(--sd-accent-night-soft);--sd-accent-line:#24456e;
  --sd-ink:#F1F5F9;--sd-ink2:#CBD5E1;--sd-muted:#94A3B8;--sd-line:#17304F;--sd-line2:#2C4E77;
  --sd-page:#0A1628;--sd-surface:#0F1F36;--sd-surface2:#142943;--sd-thumb:#142943;
  --sd-green-lt:#123524;--sd-green-dk:#5CC48D;--sd-amber-lt:#3A2C0C;--sd-amber:#F2C46D;
  --sd-sh:0 1px 2px rgba(0,0,0,.4);--sd-sh-up:0 12px 28px -10px rgba(0,0,0,.6);
}
:root[data-theme="dark"] .sd [data-cc]{--sd-cc-text:var(--sd-cc-nt);--sd-cc-soft:var(--sd-cc-ns)}
:root[data-theme="dark"] .sd-hero-card,:root[data-theme="dark"] .sd-dside{box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}

@media (prefers-reduced-motion:reduce){.sd *{transition:none!important;animation:none!important;scroll-behavior:auto!important}}