/* Skill challenges: the /challenges page and the home page's strip. Uses the site's tokens (site.css). */
.ch{max-width:1120px;margin:0 auto;padding:118px 24px 72px}
.ch-hero{max-width:640px;margin-bottom:34px}
.ch-hero h1{margin:0;font:700 clamp(40px,6vw,64px)/1.02 var(--font);letter-spacing:-.03em;color:var(--ink)}
.ch-hero p:not(.eyebrow){margin:14px 0 0;font-size:18px;color:var(--body-ink);max-width:52ch}

.ch-feature{display:grid;grid-template-columns:1.15fr 1fr;border-radius:22px;overflow:hidden;background:var(--surface);box-shadow:0 0 0 1px var(--line),0 30px 70px -40px rgba(0,0,0,.55)}
.ch-media{display:block;position:relative;min-height:100%;background:#0d0f12}
.ch-media img{display:block;width:100%;height:100%;object-fit:cover;object-position:32% 40%}
.ch-body{padding:30px 30px 26px}
.ch-tag{margin:0 0 8px;font:500 12px/1.3 "Geist Mono",ui-monospace,monospace;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.ch-body h2{margin:0;font:italic 800 46px/1 "Barlow Condensed",Impact,sans-serif;letter-spacing:.01em;color:var(--ink);text-transform:uppercase}
.ch-desc{margin:12px 0 0;color:var(--body-ink);font-size:15.5px}
.ch-cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.ch-btn{display:inline-flex;align-items:center;gap:8px;min-height:48px;padding:0 22px;border-radius:12px;background:#f5c518;color:#14151a;font-weight:800;text-decoration:none}
.ch-btn:hover{filter:brightness(1.05)}
.ch-btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line-strong)}
.ch-btn .pro{display:grid;place-items:center;height:24px;padding:0 7px;border-radius:6px;background:#ff5a4f;color:#fff;font-size:11px;letter-spacing:.08em}
.ch-board{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.ch-board h3{margin:0 0 8px;font:600 12.5px/1.2 var(--font);color:var(--muted);letter-spacing:.02em}
.ch-board ol{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.ch-board li{display:grid;grid-template-columns:22px 1fr auto;gap:8px;align-items:center;font-size:14px;color:var(--ink)}
.ch-board li.none{display:block;color:var(--muted);font-size:13px}
.ch-board .rk{display:grid;place-items:center;width:22px;height:22px;border-radius:7px;background:var(--chip);font-weight:800;font-size:12px}
.ch-board li:first-child .rk{background:#f5c518;color:#14151a}
.ch-board .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ch-board b{font:700 16px "Barlow Condensed",sans-serif;font-variant-numeric:tabular-nums}

.ch-more{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}
.ch-more>div{padding:24px;border-radius:18px;background:var(--surface);box-shadow:0 0 0 1px var(--line)}
.ch-more h2{margin:0 0 6px;font:700 19px/1.25 var(--font);color:var(--ink)}
.ch-more p{margin:0;color:var(--body-ink);font-size:15px}
.ch-more a{color:var(--ink);font-weight:600}

@media (max-width:860px){
  .ch{padding:96px 16px 48px}
  .ch-feature{grid-template-columns:1fr}
  .ch-media{aspect-ratio:1200/630}
  .ch-body{padding:22px 18px 20px}
  .ch-body h2{font-size:40px}
  .ch-board,.ch-more{grid-template-columns:1fr}
  .ch-btn{flex:1;justify-content:center}
}

/* the home page strip, under the hero */
.challenge-strip{display:block;max-width:1120px;margin:18px auto 0;padding:0 24px;text-decoration:none}
.challenge-strip>span{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 18px;border-radius:16px;background:linear-gradient(90deg,rgba(245,197,24,.16),rgba(245,197,24,.04));box-shadow:inset 0 0 0 1px rgba(245,197,24,.4);color:var(--ink)}
.challenge-strip .cs-tag{font:500 11.5px/1.3 "Geist Mono",ui-monospace,monospace;letter-spacing:.1em;text-transform:uppercase;color:#d9a800}
:root[data-theme="dark"] .challenge-strip .cs-tag{color:#f5c518}
.challenge-strip b{font-size:16px}
.challenge-strip .cs-sub{color:var(--body-ink);font-size:14.5px}
.challenge-strip .cs-go{margin-left:auto;display:inline-flex;align-items:center;min-height:38px;padding:0 16px;border-radius:10px;background:#f5c518;color:#14151a;font-weight:800;font-size:14px}
.challenge-strip:hover .cs-go{filter:brightness(1.05)}
@media (max-width:860px){ .challenge-strip{padding:0 16px}.challenge-strip .cs-go{margin-left:0} }