:root{
  --art-bg:#f4f7ff;--art-panel:#fff;--art-ink:#0f172a;--art-muted:#64748b;--art-line:#e2e8f0;
  --art-blue:#2563eb;--art-violet:#6d4aff;--art-cyan:#0ea5e9;--art-green:#16a34a;--art-radius:22px;
  --art-shadow:0 18px 50px rgba(15,23,42,.08)
}
html[data-theme="dark"]{--art-bg:#08111f;--art-panel:#101a2b;--art-ink:#e5edf9;--art-muted:#9fb0c8;--art-line:#22324a;--art-shadow:none}
body{background:radial-gradient(circle at 8% 8%,rgba(37,99,235,.08),transparent 28%),radial-gradient(circle at 88% 6%,rgba(109,74,255,.09),transparent 28%),var(--art-bg)!important;color:var(--art-ink)!important}
.art-subnav-wrap{position:sticky;top:0;z-index:55;padding:8px 14px;background:color-mix(in srgb,var(--art-bg) 88%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--art-line)}
.art-subnav{max-width:1280px;margin:auto;display:flex;gap:7px;overflow-x:auto;scrollbar-width:none}.art-subnav::-webkit-scrollbar{display:none}
.art-subnav a{flex:0 0 auto;padding:9px 13px;border-radius:999px;font-size:13px;font-weight:800;color:var(--art-muted)}
.art-subnav a:hover,.art-subnav a.active{background:var(--art-panel);color:var(--art-blue);box-shadow:0 5px 18px rgba(15,23,42,.06)}
.art-main{max-width:1280px;margin:0 auto;padding:22px 18px 54px}
.art-hero{position:relative;overflow:hidden;display:grid;grid-template-columns:1.15fr .85fr;gap:24px;padding:38px;border:1px solid var(--art-line);border-radius:30px;background:linear-gradient(135deg,rgba(37,99,235,.13),rgba(109,74,255,.1) 52%,rgba(14,165,233,.08)),var(--art-panel);box-shadow:var(--art-shadow)}
.art-hero:after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;right:-90px;top:-130px;background:linear-gradient(135deg,#2563eb,#8b5cf6);opacity:.13;filter:blur(2px)}
.art-kicker{display:inline-flex;padding:7px 11px;border:1px solid rgba(37,99,235,.25);border-radius:999px;color:var(--art-blue);font-size:12px;font-weight:900;background:rgba(255,255,255,.55)}
.art-hero h1{font-size:clamp(2.6rem,6vw,5.2rem);line-height:.95;margin:18px 0 16px;letter-spacing:-.05em}.art-hero h1 span{color:var(--art-blue)}
.art-lead{font-size:17px;line-height:1.7;color:var(--art-muted);max-width:760px}.art-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.art-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border-radius:13px;border:1px solid var(--art-line);font-weight:850;background:var(--art-panel)}
.art-btn.primary{background:linear-gradient(135deg,var(--art-blue),var(--art-violet));color:white;border-color:transparent}.art-btn:hover{transform:translateY(-1px)}
.art-hero-panel{position:relative;z-index:2;display:grid;gap:10px;align-content:center}.art-mini{padding:16px;border:1px solid var(--art-line);border-radius:18px;background:color-mix(in srgb,var(--art-panel) 88%,transparent)}.art-mini strong{display:block;font-size:25px}.art-mini span{color:var(--art-muted);font-size:12px}
.art-section{padding:30px 0 0}.art-section-head{display:flex;justify-content:space-between;gap:14px;align-items:end;margin-bottom:14px}.art-section h2{font-size:clamp(1.45rem,3vw,2.2rem);margin:0}.art-section-head p{max-width:620px;color:var(--art-muted);margin:0}
.art-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:14px}.art-card{grid-column:span 4;padding:18px;border-radius:20px;border:1px solid var(--art-line);background:var(--art-panel);box-shadow:0 10px 28px rgba(15,23,42,.05)}.art-card h3{margin:7px 0 9px}.art-card p{margin:0;color:var(--art-muted);line-height:1.55}.art-card .meta{font-size:11px;color:var(--art-blue);font-weight:900}.art-card:hover{transform:translateY(-2px);box-shadow:var(--art-shadow)}
.course-card{grid-column:span 4;min-height:220px;display:flex;flex-direction:column}.course-icon{font-size:30px}.course-card .art-btn{margin-top:auto;align-self:flex-start}
.student-card{grid-column:span 3}.student-card .student-name{font-size:18px;font-weight:900}.student-card .work-count{display:inline-flex;margin-top:10px;padding:5px 9px;border-radius:999px;background:#eef4ff;color:#2457a6;font-size:11px;font-weight:800}
.work-card{grid-column:span 3;overflow:hidden;padding:0}.work-preview{height:210px;background:#eef2f7;display:grid;place-items:center;border-bottom:1px solid var(--art-line);overflow:hidden}.work-preview img,.work-preview model-viewer{width:100%;height:100%;object-fit:cover}.work-preview .file-icon{font-size:44px}.work-info{padding:13px}.work-info h3{font-size:15px;margin:0 0 5px}.work-info p{font-size:12px}.work-chip{display:inline-flex;padding:4px 7px;border-radius:999px;background:#f1f5f9;color:#53657d;font-size:10px;font-weight:800;margin-bottom:7px}
.filters-bar{display:flex;gap:7px;flex-wrap:wrap;margin:15px 0}.filter-chip{border:1px solid var(--art-line);background:var(--art-panel);border-radius:999px;padding:8px 11px;font-weight:800;font-size:12px;cursor:pointer}.filter-chip.active{background:var(--art-blue);color:#fff;border-color:var(--art-blue)}
.art-page-title{padding:24px 0 8px}.art-page-title h1{font-size:clamp(2rem,5vw,4rem);margin:0 0 8px}.art-page-title p{color:var(--art-muted);max-width:760px;line-height:1.6}
.gallery-grid{columns:4 240px;column-gap:12px}.gallery-item{break-inside:avoid;margin-bottom:12px;border-radius:17px;overflow:hidden;border:1px solid var(--art-line);background:var(--art-panel)}.gallery-item img{width:100%;height:auto}.gallery-item figcaption{padding:10px;font-size:12px;color:var(--art-muted)}
.course-shell{display:grid;grid-template-columns:280px 1fr;gap:18px}.course-nav{position:sticky;top:68px;align-self:start;padding:14px;border:1px solid var(--art-line);border-radius:18px;background:var(--art-panel)}.course-nav a{display:block;padding:9px 10px;border-radius:10px;color:var(--art-muted);font-size:12px;font-weight:750}.course-nav a:hover{background:#eef4ff;color:var(--art-blue)}.course-content{padding:20px;border:1px solid var(--art-line);border-radius:20px;background:var(--art-panel)}.course-module{padding:16px 0;border-bottom:1px solid var(--art-line)}.course-module:last-child{border-bottom:0}
.empty-state{padding:30px;text-align:center;border:1px dashed var(--art-line);border-radius:18px;color:var(--art-muted);background:var(--art-panel)}
.art-footer{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:22px max(18px,calc((100vw - 1280px)/2));border-top:1px solid var(--art-line);color:var(--art-muted);font-size:12px}
@media(max-width:980px){.art-hero{grid-template-columns:1fr}.art-card,.course-card{grid-column:span 6}.student-card,.work-card{grid-column:span 6}.course-shell{grid-template-columns:1fr}.course-nav{position:static}}
@media(max-width:640px){.art-main{padding:12px 10px 38px}.art-subnav-wrap{padding:6px 8px}.art-subnav a{font-size:11px;padding:8px 10px}.art-hero{padding:22px 17px;border-radius:21px}.art-hero h1{font-size:2.65rem}.art-lead{font-size:14px}.art-section{padding-top:23px}.art-section-head{align-items:start;flex-direction:column}.art-card,.course-card,.student-card,.work-card{grid-column:span 12}.work-preview{height:240px}.gallery-grid{columns:2 150px}}