.w1-concepts{--bg-primary:#000;--bg-elev:#0f0f0f;--bg-elev-2:#161616;--text-primary:#fff;--text-secondary:hsla(0,0%,100%,.72);--text-muted:hsla(0,0%,100%,.5);--accent:#fa2132;--accent-dim:rgba(250,33,50,.16);--rule:hsla(0,0%,100%,.08);--rule-strong:hsla(0,0%,100%,.16)}.w1-concepts *{box-sizing:border-box;margin:0;padding:0}.w1-concepts{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:var(--bg-primary);color:var(--text-primary);font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;font-weight:400;line-height:1.7}.w1-concepts main{margin:0 auto;max-width:1080px;padding:56px 32px 96px}.w1-concepts .breadcrumb{color:var(--text-muted);font-size:13px;letter-spacing:.02em;margin-bottom:48px}.w1-concepts .breadcrumb a{color:var(--text-muted);text-decoration:none;transition:color .15s ease}.w1-concepts .breadcrumb a:hover{color:var(--text-secondary)}.w1-concepts .breadcrumb .sep{color:var(--text-muted);margin:0 8px;opacity:.5}.w1-concepts .breadcrumb .current{color:var(--text-secondary)}.w1-concepts h1{color:var(--text-primary);font-size:56px;font-weight:700;letter-spacing:-.025em;line-height:1.05;margin-bottom:32px}.w1-concepts .lede{max-width:760px}.w1-concepts .lede p{color:var(--text-primary);font-size:18px;letter-spacing:-.005em;line-height:1.65;margin-bottom:20px}.w1-concepts .lede p:last-child{margin-bottom:0}.w1-concepts .lede a{border-bottom:1px solid rgba(250,33,50,.5);color:var(--text-primary);text-decoration:none}.w1-concepts .lede a:hover{border-bottom-color:var(--accent);color:var(--accent)}.w1-concepts h2{color:var(--text-primary);font-size:28px;font-weight:600;letter-spacing:-.018em;line-height:1.2;margin-bottom:32px;margin-top:72px;padding-left:16px;position:relative}.w1-concepts h2:before{background:var(--accent);bottom:12px;content:"";left:0;position:absolute;top:12px;width:2px}.w1-concepts .concept-grid{border-top:1px solid var(--rule);display:grid;gap:0;grid-template-columns:repeat(2,1fr)}.w1-concepts .concept-card{border-bottom:1px solid var(--rule);color:inherit;display:block;padding:24px 28px 24px 0;position:relative;text-decoration:none;transition:background .15s ease}.w1-concepts .concept-card:nth-child(odd){border-right:1px solid var(--rule);padding-right:32px}.w1-concepts .concept-card:nth-child(2n){padding-left:28px}.w1-concepts .concept-card:hover{background:rgba(250,33,50,.04)}.w1-concepts .concept-card:hover .concept-name{color:var(--accent)}.w1-concepts .concept-name{color:var(--text-primary);font-size:18px;font-weight:600;letter-spacing:-.012em;margin-bottom:6px;transition:color .15s ease}.w1-concepts .concept-gloss{color:var(--text-secondary);font-size:14px;line-height:1.55;margin:0}.w1-concepts .concept-card:after{color:var(--accent);content:"\2192";font-size:16px;opacity:0;position:absolute;right:0;top:24px;transition:opacity .15s ease,transform .15s ease}.w1-concepts .concept-card:nth-child(odd):after{right:16px}.w1-concepts .concept-card:hover:after{opacity:1;transform:translateX(2px)}.w1-concepts .see-also{border-top:1px solid var(--rule);color:var(--text-secondary);font-size:14px;line-height:1.7;margin-top:72px;padding-top:32px}.w1-concepts .see-also a{border-bottom:1px solid rgba(250,33,50,.5);color:var(--text-primary);text-decoration:none}.w1-concepts .see-also a:hover{border-bottom-color:var(--accent);color:var(--accent)}@media (max-width:760px){.w1-concepts main{padding:32px 20px 64px}.w1-concepts h1{font-size:38px}.w1-concepts h2{font-size:24px;margin-top:56px}.w1-concepts .lede p{font-size:16px}.w1-concepts .concept-grid{grid-template-columns:1fr}.w1-concepts .concept-card:nth-child(odd){border-right:none;padding-right:0}.w1-concepts .concept-card:nth-child(2n){padding-left:0}.w1-concepts .concept-card:after,.w1-concepts .concept-card:nth-child(odd):after{right:0}}