.landing{--content-width: 1120px}.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:10px max(24px,calc((100vw - var(--content-width)) / 2));background:var(--header);color:#fff}.site-brand{display:inline-flex;align-items:center;color:#fff;font-size:23px;font-weight:800;letter-spacing:-.8px;white-space:nowrap}.site-brand:hover{text-decoration:none}.site-brand>span:not(.brand-bot):not(.brand-dot){font-weight:500}.brand-bot{width:40px;height:42px;margin-right:8px}.brand-bot img{width:100%;height:100%}.brand-dot{color:#ffcc6a}.site-header nav{display:flex;flex-wrap:wrap;gap:5px}.site-header nav a{display:inline-flex;align-items:center;padding:10px 15px;min-height:44px;color:#fff;font-size:14px;font-weight:650;border-radius:9px}.site-header nav a:hover,.site-header nav a[aria-current]{background:#ffffff24;text-decoration:none}.site-header :focus-visible{outline-color:#ffcf70}.landing main,.site-footer{max-width:var(--content-width);margin-inline:auto}.welcome{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:34px 0}.welcome h1{font-size:clamp(30px,3.6vw,38px);line-height:1.2;margin:0 0 8px;letter-spacing:-1px}.welcome p{color:var(--text-dim);font-size:16px;margin:0}.welcome .btn{flex-shrink:0;font-size:14px;padding:12px 18px}.eyebrow{color:var(--link);font-size:11px;font-weight:800;letter-spacing:1.5px}.game-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.activity-card{--game-tint: #e6edff;min-width:0;overflow:hidden;background:var(--bg-card);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow);transition:transform .16s,border-color .16s}.activity-card:hover{transform:translateY(-3px);border-color:var(--accent)}.game-morra{--game-tint: #fff0d8}.game-navale{--game-tint: #e0f2fb}.game-arena{--game-tint: #f0e7fc}.game-othello{--game-tint: #e0f2e7}.game-forza4{--game-tint: #ffe8e5}.game-art{position:relative;background:var(--game-tint);padding-top:8px}.game-art svg{display:block;width:100%;height:110px}.activity-content{padding:17px 20px 18px}.activity-content h2{font-size:19px;margin:0 0 5px;letter-spacing:-.35px}.activity-content p{color:var(--text-dim);font-size:13px;line-height:1.55;min-height:40px;margin:0 0 15px}.activity-links{display:flex;align-items:center;gap:14px}.activity-links a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;font-size:13px;font-weight:750}.activity-links a:first-child{flex:1;border:1px solid var(--border);border-radius:9px;gap:8px;color:var(--link);background:var(--accent-soft)}.activity-links a:first-child:hover{border-color:var(--accent);text-decoration:none}.site-footer{display:flex;align-items:center;flex-wrap:wrap;gap:8px 28px;margin-top:36px;padding:18px 0;border-top:1px solid var(--border)}.site-footer a{display:inline-flex;align-items:center;min-height:44px;color:var(--text-dim);font-size:12px}.site-credit{margin-left:auto;color:var(--text-dim);font-size:12px}.site-credit a{color:var(--link)}.explanation{max-width:760px;padding:42px 0;margin:auto}.explanation h1{font-size:clamp(28px,4vw,38px);line-height:1.25}.explanation-lead{color:var(--text-dim)}.explanation-steps{list-style:none;padding:0;display:grid;gap:16px;margin:24px 0}.explanation-steps li{padding:22px;background:var(--bg-card);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}.explanation-steps p,.discovery-note p{margin-bottom:0}.discovery-note{border-left:4px solid var(--accent);padding:10px 20px;background:var(--accent-soft);border-radius:0 12px 12px 0}.explanation details{margin:24px 0}.explanation summary{padding:12px 0;font-weight:650}@media(max-width:1170px){.landing main,.site-footer{margin-inline:24px}}@media(max-width:850px){.site-header{gap:10px;flex-wrap:wrap}.site-header nav{gap:0}.site-header nav a{padding-inline:10px}.game-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.landing main,.site-footer{margin-inline:16px}.site-header{padding:10px 16px 6px}.site-brand{font-size:22px}.site-header nav{width:100%;justify-content:space-between}.site-header nav a{font-size:12px;padding-inline:6px}.welcome{align-items:flex-start;flex-direction:column;gap:18px;padding:26px 0}.welcome h1{font-size:30px}.welcome p{font-size:15px}.game-grid{grid-template-columns:1fr;gap:18px}.game-art svg{height:125px}.activity-content p{min-height:0;font-size:14px}.activity-links a{font-size:14px}.site-credit{flex-basis:100%;margin-left:0}.explanation{padding-top:26px}}@media(prefers-color-scheme:dark){.game-art{background:color-mix(in srgb,var(--game-tint) 18%,var(--bg))}}