.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:42px 26px}.catalog-toolbar{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:0 0 28px}.catalog-toolbar h2{margin:0;max-width:760px}.unused-motion-toggle{border:0;border-bottom:1px solid #888;background:transparent;color:#222;padding:8px 0;font:14px Arial,sans-serif;cursor:pointer;white-space:nowrap}
.topic{min-width:0}.course-poster{position:relative;isolation:isolate;display:flex;flex-direction:column;align-items:stretch;justify-content:space-between;aspect-ratio:1 / 1.08;overflow:hidden;background:#07090e;color:#fff;padding:0;border:0;border-radius:0;width:100%;text-decoration:none;text-align:left;font-family:Arial,Helvetica,sans-serif;transition:transform .22s,box-shadow .22s}.course-poster:disabled{opacity:1;cursor:default;color:#fff;background:#07090e}.course-poster:focus-visible{outline:3px solid #1745db;outline-offset:5px}.course-poster[href]:hover{transform:translateY(-6px);box-shadow:0 10px 0 #e1e4eb}
.art-stack{position:relative;display:block;min-height:150px;flex:1;background:radial-gradient(ellipse at center,var(--art-color),#1a2034 85%);overflow:hidden}.art-back{position:absolute;left:13%;top:16%;width:72%;height:67%;background:var(--art-color);border:2px solid #ffffff50;transform:rotate(-9deg);box-shadow:0 8px 20px #0005}.art-bars{display:flex;align-items:end;justify-content:space-around;position:absolute;inset:10%;border-bottom:1px solid #0006}.art-bars i{display:block;width:14%;height:30%;background:#fff7}.art-bars i:nth-child(2){height:52%}.art-bars i:nth-child(3){height:69%}.art-bars i:nth-child(4){height:90%}
.art-main{position:absolute;left:9%;top:15%;width:84%;height:68%;object-fit:cover;border:3px solid #111;transform:rotate(4deg);box-shadow:6px 9px 0 #0006;image-rendering:auto;animation:artDrift 7s ease-in-out infinite}.art-02,.art-04{object-position:80% 45%}.art-03,.art-05{object-position:90% center}.art-note{position:absolute;bottom:12%;left:7%;max-width:85%;padding:9px 12px;background:#07090e;color:#fff;font-size:12px;line-height:1.2;transform:rotate(-3deg);border:1px solid #ffffff65;animation:noteDrift 6s ease-in-out infinite}.topic:nth-child(even) .art-main{animation-delay:-3s}.topic:nth-child(3n) .art-note{animation-delay:-2s}.poster-bottom{padding:23px 22px 22px;display:block;min-height:115px;background:#07090e}.course-poster .topic-name{display:block;font-size:clamp(20px,2vw,27px);font-weight:500;letter-spacing:-.035em;line-height:1.1}.poster-status{display:block;font-size:12px;font-weight:400;color:#bfc9dd;margin-top:12px}.topic h3{font:700 20px/1.15 Arial,Helvetica,sans-serif;letter-spacing:-.035em;margin:21px 0 9px;color:#111}.topic p{font:15px/1.5 Arial,Helvetica,sans-serif;color:#444;margin:0}.motion-paused .art-main,.motion-paused .art-note{animation-play-state:paused}
@keyframes artDrift{0%,100%{transform:translateY(0) rotate(4deg)}50%{transform:translateY(-7px) rotate(1deg)}}@keyframes noteDrift{0%,100%{transform:translateX(0) rotate(-3deg)}50%{transform:translateX(5px) rotate(0)}}
@media(max-width:900px){.catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px 20px}.course-poster .topic-name{font-size:23px}}@media(max-width:560px){.catalog-toolbar{align-items:start;flex-direction:column;gap:12px}.catalog-grid{gap:30px 14px}.course-poster{aspect-ratio:auto;min-height:290px}.art-stack{min-height:165px}.poster-bottom{padding:17px 12px;min-height:115px}.course-poster .topic-name{font-size:19px}.art-note{font-size:10px;padding:7px;bottom:9%}.topic h3{font-size:18px}.poster-status{font-size:11px}.art-main{left:5%;width:90%}.unused-motion-toggle{font-size:13px}}@media(max-width:350px){.catalog-grid{grid-template-columns:1fr}.course-poster{min-height:350px}.art-stack{min-height:220px}}@media(prefers-reduced-motion:reduce){.art-main,.art-note{animation:none}.course-poster[href]:hover{transform:none;box-shadow:none}}

.single-course{grid-template-columns:minmax(0,400px);max-width:100%;gap:0}.single-course .course-poster{min-height:0;aspect-ratio:1/1.03}.art-main,.art-note{animation:none}.art-stack{animation:posterReveal .7s both}@keyframes posterReveal{from{opacity:.35;transform:translateY(12px)}to{opacity:1;transform:none}}@media(max-width:650px){.single-course{grid-template-columns:1fr;max-width:460px;margin-inline:auto}.single-course .course-poster{aspect-ratio:1/1.02}.art-stack{min-height:240px}.poster-bottom{padding:22px}.course-poster .topic-name{font-size:27px}.topic h3{font-size:24px}.topic p{font-size:17px}.art-note{font-size:12px}}@media(prefers-reduced-motion:reduce){.art-stack{animation:none}}

@media(max-width:650px){.single-course .course-poster{aspect-ratio:1/1.08;min-height:380px}.single-course .art-stack{min-height:220px}.single-course .poster-bottom{min-height:135px}}