/* PicoX activity pages: cards + banner list (/activity/) and single detail pages. */
:root{--ink:#0a0a0a;--muted:#737373;--line:#e5e5e5;--soft:#f5f5f5;--blue:#1687e8;--shell:1400px}
*{box-sizing:border-box}
body{margin:0;background:#fff;color:var(--ink);font-family:Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.shell{max-width:var(--shell);margin:0 auto;padding:0 24px}

/* header (matches models/) */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--shell);margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px}
.brand-mark{display:grid;grid-template-columns:repeat(2,8px);grid-template-rows:repeat(2,8px);gap:2px;transform:rotate(45deg)}
.brand-mark i{background:var(--ink);border-radius:2px}.brand-mark i:first-child{border-radius:5px 2px 2px 2px}
.header-divider{color:var(--line)}
.section-name{color:var(--muted);font-size:14px;font-weight:600}
.section-name:hover{color:var(--ink)}
.main-nav{display:flex;gap:22px;margin-left:18px}
.main-nav a{color:var(--muted);font-size:13px;font-weight:500}
.main-nav a:hover,.main-nav a.active{color:var(--ink)}
.header-spacer{flex:1}
.pill{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:999px;font-size:13px;font-weight:600;border:1px solid transparent}
.pill-dark{background:var(--ink);color:#fff}
.pill-dark:hover{background:#222}
.pill-light{background:#fff;color:var(--ink);border-color:var(--line)}
.pill-light:hover{border-color:var(--ink)}

/* hero */
.page-hero{padding:72px 24px 40px}
.activity-catalog{padding-bottom:80px}
.page-hero .eyebrow{margin:0 0 12px;color:var(--blue);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}
.page-hero h1{margin:0 0 14px;font-size:clamp(32px,5vw,52px);line-height:1.05;letter-spacing:-.02em}
.page-hero p{margin:0;max-width:640px;color:var(--muted);font-size:16px;line-height:1.6}

/* featured banner */
.feature-banner{position:relative;overflow:hidden;border-radius:24px;color:#fff;padding:clamp(28px,5vw,56px);margin-bottom:40px;display:block}
.feature-banner .banner-tag{display:inline-block;background:rgba(255,255,255,.18);padding:6px 12px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.04em;margin-bottom:16px}
.feature-banner h2{margin:0 0 12px;font-size:clamp(24px,3.5vw,40px);letter-spacing:-.02em;max-width:60%}
.feature-banner p{margin:0 0 24px;max-width:52%;font-size:15px;line-height:1.6;color:rgba(255,255,255,.9)}
.feature-banner .banner-cta{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--ink);padding:11px 20px;border-radius:999px;font-size:13px;font-weight:700}
.feature-banner .banner-glow{position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.14);filter:blur(10px)}

/* cards grid */
.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;padding-bottom:80px}
.activity-card{display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line);border-radius:20px;background:#fff;transition:transform .18s,box-shadow .18s}
.activity-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(0,0,0,.08)}
.card-banner{position:relative;height:150px;display:flex;align-items:flex-end;padding:18px;color:#fff}
.card-banner .banner-badge{background:rgba(255,255,255,.2);padding:5px 11px;border-radius:999px;font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase}
.card-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1}
.card-body h3{margin:0;font-size:19px;letter-spacing:-.01em}
.card-body p{margin:0;color:var(--muted);font-size:14px;line-height:1.55;flex:1}
.card-meta{display:flex;align-items:center;justify-content:space-between;margin-top:6px}
.card-meta .date{color:var(--muted);font-size:12px;font-weight:600}
.card-meta .open{display:inline-flex;align-items:center;gap:6px;color:var(--accent,var(--blue));font-size:13px;font-weight:700}

/* detail page */
.detail-hero{position:relative;overflow:hidden;color:#fff;padding:clamp(56px,9vw,110px) 0}
.detail-hero .eyebrow{display:inline-block;background:rgba(255,255,255,.18);padding:6px 12px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin:0 0 18px}
.detail-hero h1{margin:0 0 16px;font-size:clamp(30px,4.6vw,52px);line-height:1.05;letter-spacing:-.02em;max-width:900px}
.detail-hero .hero-sub{margin:0;font-size:17px;line-height:1.55;color:rgba(255,255,255,.92);max-width:680px}
.detail-hero .banner-glow{position:absolute;right:-100px;bottom:-120px;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.12);filter:blur(12px)}
.detail-body{padding:56px 0 40px;max-width:920px}
.detail-body section{margin-bottom:36px}
.detail-body h2{margin:0 0 12px;font-size:22px;letter-spacing:-.01em}
.detail-body p{margin:0;color:#3a3a3a;font-size:15px;line-height:1.7}
.detail-cta{display:flex;gap:14px;align-items:center;padding:32px 0 80px;border-top:1px solid var(--line)}
.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:13px;font-weight:600;margin:24px 0 0}
.back-link:hover{color:var(--ink)}

@media(max-width:760px){
  .feature-banner h2,.feature-banner p{max-width:100%}
  .main-nav{display:none}
  .page-hero{padding:48px 24px 28px}
  .header-inner{gap:10px;padding:0 16px}
  .header-divider,.section-name{display:none}
  .pill{padding:10px 14px}
  .shell{padding-left:18px;padding-right:18px}
}