:root{--ivoire:#faf5ea;--ivoire-2:#f5efe0;--ivoire-3:#ede5d2;--encre:#1a1916;--encre-soft:#2e2b26;--encre-mute:#6f6a60;--terre:#a8472a;--terre-soft:#c25d3f;--terre-glow:#a8472a14;--sage:#4d6053;--sage-soft:#6f8275;--sage-glow:#4d605312;--gold:#b68b3d;--gold-soft:#d4a85c;--gold-glow:#b68b3d1f;--rule:#1a19161f;--rule-strong:#1a19163d;--font-display:"Fraunces", Georgia, serif;--font-body:"Manrope", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono:"JetBrains Mono", Consolas, monospace}.editorial *{box-sizing:border-box;margin:0;padding:0}.editorial{scroll-behavior:smooth;background:var(--ivoire);color:var(--encre);font-family:var(--font-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;font-size:17px;font-weight:400;line-height:1.6}.editorial ::selection{background:var(--terre);color:var(--ivoire)}.editorial .topbar{z-index:100;background:var(--ivoire);border-bottom:1px solid 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.rail-left,.editorial .rail-right{display:none}.editorial .models,.editorial .cards-grid,.editorial .os-split,.editorial .lesson-nav{grid-template-columns:1fr}.editorial .nav-link.next{text-align:left}.editorial .topbar-inner{flex-direction:column;align-items:flex-start;gap:8px;padding:12px 20px}.editorial .topbar-meta{text-align:left}.editorial .validation{flex-direction:column;align-items:flex-start}.editorial .btn-validate{width:100%}}