:root{
  --navy:#1F4E79; --teal:#2C7A7B; --gold:#E9A63A; --bg:#F8FAFC; --section:#EEF4F7;
  --text:#334155; --muted:#64748B; --border:#D8E2EA; --white:#fff;
  --radius:18px; --shadow:0 10px 30px rgba(31,78,121,.10); --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--text)}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
button{font:inherit}
.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.header-inner{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo img{height:52px;width:auto}
.nav{display:flex;align-items:center;gap:24px;font-weight:650;color:var(--navy)}
.nav a:hover{color:var(--teal)}
.lang-switch{display:flex;border:1px solid var(--border);border-radius:999px;overflow:hidden}
.lang-switch button{border:0;background:#fff;padding:8px 11px;cursor:pointer;color:var(--navy)}
.lang-switch button.active{background:var(--navy);color:#fff}
.menu-btn{display:none;border:0;background:none;font-size:28px;color:var(--navy)}

.hero{padding:38px 0 44px}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;background:#fff;border:1px solid var(--border);border-radius:26px;overflow:hidden;box-shadow:var(--shadow);min-height:470px}
.hero-media{min-height:420px;background:url('/resources/site/coh-hero-community.webp') center center/cover no-repeat}
.hero-copy{padding:58px 52px;display:flex;flex-direction:column;justify-content:center;background:linear-gradient(140deg,#fff 0%,#f4fbfb 100%)}
.eyebrow{font-weight:800;color:var(--teal);text-transform:uppercase;letter-spacing:.12em;font-size:.78rem}
h1,h2,h3{color:var(--navy);margin-top:0}
h1{font-size:clamp(2.25rem,4vw,4rem);line-height:1.02;margin-bottom:20px}
h2{font-size:clamp(1.55rem,2.4vw,2.4rem)}
.lead{font-size:1.12rem;line-height:1.7;color:#475569}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:999px;font-weight:750;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--gold);color:#173b5b}
.btn-secondary{border-color:var(--teal);color:var(--navy);background:#fff}

.section{padding:54px 0}
.section.alt{background:#fff}
.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:24px}
.section-head p{max-width:720px;margin:0;color:var(--muted);line-height:1.7}
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.process-step{background:#fff;border:1px solid var(--border);padding:22px;border-radius:16px;text-align:center}
.process-step b{display:block;color:var(--navy);margin-top:8px}

.series-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:0 5px 18px rgba(31,78,121,.06)}
.card-media{aspect-ratio:16/9;background:#e8f2f6;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover}
.card-body{padding:20px}
.card-body h3{margin-bottom:9px;font-size:1.2rem}
.card-body p{color:var(--muted);line-height:1.55}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin:14px 0}
.tag{font-size:.75rem;padding:5px 9px;border-radius:999px;background:var(--section);color:var(--navy);font-weight:700}

.page-hero{padding:44px 0 28px;background:#fff;border-bottom:1px solid var(--border)}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:16px}
.page-hero p{max-width:820px;line-height:1.7;color:var(--muted)}

.resource-section{margin-top:34px}
.scroller-wrap{position:relative}
.scroller{display:grid;grid-auto-flow:column;grid-auto-columns:calc((100% - 32px)/3);gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;padding:2px 2px 12px;scrollbar-width:thin}
.scroller .card{scroll-snap-align:start}
.resource-thumb{aspect-ratio:4/5;background:#f0f4f7}
.resource-thumb img{width:100%;height:100%;object-fit:cover}
.card-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:14px}
.small-btn{padding:9px 12px;border-radius:10px;font-size:.85rem;font-weight:700;background:var(--navy);color:#fff}

.detail-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:34px;align-items:start}
.viewer{background:#fff;border:1px solid var(--border);border-radius:18px;padding:16px;box-shadow:var(--shadow)}
.viewer img{width:100%;border-radius:12px}
.viewer video{width:100%;border-radius:12px;background:#000}
.meta{background:#fff;border:1px solid var(--border);border-radius:18px;padding:26px}
.meta-list{display:grid;gap:13px}
.meta-row{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--border);padding-bottom:10px}
.meta-row span:first-child{color:var(--muted)}
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}

.filters{display:grid;grid-template-columns:1fr 180px 180px 180px;gap:10px;margin-bottom:24px}
.filters input,.filters select{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:#fff}
.search-results{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}

.footer{margin-top:60px;background:#173b5b;color:#dce8f2;padding:38px 0}
.footer-grid{display:flex;justify-content:space-between;gap:30px;align-items:center}
.footer small{color:#b9ccdc}

.empty{padding:30px;border:1px dashed var(--border);border-radius:16px;text-align:center;color:var(--muted);background:#fff}

@media(max-width:900px){
 .nav{display:none;position:absolute;left:0;right:0;top:76px;background:#fff;border-bottom:1px solid var(--border);padding:20px;flex-direction:column;align-items:flex-start}
 .nav.open{display:flex}.menu-btn{display:block}
 .hero-grid,.detail-grid{grid-template-columns:1fr}
 .hero-media{min-height:360px}
 .process{grid-template-columns:repeat(2,1fr)}
 .series-grid,.search-results{grid-template-columns:repeat(2,1fr)}
 .scroller{grid-auto-columns:calc((100% - 16px)/2)}
 .filters{grid-template-columns:1fr 1fr}
 .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:600px){
 .container{width:min(100% - 24px,var(--max))}
 .hero{padding-top:18px}.hero-copy{padding:34px 24px}.hero-media{min-height:300px}
 .process,.series-grid,.search-results,.related-grid{grid-template-columns:1fr}
 .scroller{grid-auto-columns:88%}
 .filters{grid-template-columns:1fr}
 .header-inner{height:68px}.logo img{height:44px}.nav{top:68px}
}