:root{--gvl-ink: #14231f;--gvl-ink-soft: #3a4a45;--gvl-paper: #f7f9f6;--gvl-paper-raised: #ffffff;--gvl-line: #d9e2dc;--gvl-green: #1f5f4a;--gvl-green-deep: #123a2d;--gvl-accent: #b98a3a;--gvl-focus: #1f5f4a;--gvl-radius: 10px;--gvl-max: 1080px;--gvl-font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--gvl-font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace}*{box-sizing:border-box}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}html{color-scheme:light}body{margin:0;background:var(--gvl-paper);color:var(--gvl-ink);font-family:var(--gvl-font-body);line-height:1.55;-webkit-font-smoothing:antialiased}a{color:var(--gvl-green-deep)}a:hover{color:var(--gvl-green)}:focus-visible{outline:3px solid 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solid transparent;transition:color .15s ease,border-color .15s ease}.gvl-nav a:hover{color:var(--gvl-green-deep);border-bottom-color:var(--gvl-green)}.gvl-nav-toggle{display:none;flex-direction:column;justify-content:center;gap:4px;width:36px;height:36px;padding:6px;border:1px solid var(--gvl-line);border-radius:6px;background:var(--gvl-paper-raised);cursor:pointer}.gvl-nav-toggle__bar{display:block;width:100%;height:2px;background:var(--gvl-ink);border-radius:1px}main{min-height:60vh}.gvl-hero{padding:4.5rem 0 3.5rem;background:linear-gradient(180deg,#eef3ee 0%,var(--gvl-paper) 100%);border-bottom:1px solid var(--gvl-line)}.gvl-hero__row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,340px);align-items:center;gap:3rem}.gvl-hero h1{font-size:clamp(2.1rem,3.6vw,3rem);line-height:1.12;letter-spacing:-.01em;margin:0 0 1.1rem}.gvl-hero p{font-size:1.15rem;color:var(--gvl-ink-soft);max-width:56ch;margin:0}.gvl-hero__art{display:flex;align-items:center;justify-content:center}.gvl-hero__art svg{width:100%;height:auto;max-width:320px}.gvl-card{background:var(--gvl-paper-raised);border:1px solid var(--gvl-line);border-radius:var(--gvl-radius);padding:1.6rem;transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}a.gvl-card{display:block;color:inherit;text-decoration:none}a.gvl-card:hover{color:inherit}.gvl-card:hover{transform:translateY(-2px);box-shadow:0 8px 20px #123a2d14;border-color:var(--gvl-green)}.gvl-card h3{margin:0 0 .5rem;font-size:1.1rem}.gvl-card p{margin:0;color:var(--gvl-ink-soft)}.gvl-card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.25rem;margin:2rem 0 0}.gvl-library-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;margin:1.5rem 0 0}.gvl-library-controls{display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between}.gvl-library-search input{width:100%;min-width:220px;padding:.6rem 1rem;border:1px solid var(--gvl-line);border-radius:999px;font-size:.95rem;background:var(--gvl-paper-raised);color:var(--gvl-ink)}.gvl-library-search input:focus-visible{outline:2px solid var(--gvl-green);outline-offset:2px}.gvl-library-filters{display:flex;flex-wrap:wrap;gap:.5rem}.gvl-pill{border:1px solid var(--gvl-line);background:var(--gvl-paper-raised);color:var(--gvl-ink-soft);border-radius:999px;padding:.4rem .9rem;font-size:.85rem;cursor:pointer;transition:background .15s ease,color .15s ease,border-color .15s ease}.gvl-pill:hover{border-color:var(--gvl-green)}.gvl-pill.is-active{background:var(--gvl-green-deep);border-color:var(--gvl-green-deep);color:#fff}.gvl-library-count{margin:1rem 0 0;color:var(--gvl-ink-soft);font-size:.9rem}.gvl-section{padding:3.5rem 0;border-top:1px solid 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print{.gvl-header,.gvl-breadcrumb,.gvl-footer,.gvl-pdf-export,.gvl-teaser,.gvl-actions,.gvl-calculator button,.gvl-related-engines,.gvl-no-print,.gvl-calculator select,.skip-link{display:none!important}.gvl-print-only{display:inline}.gvl-table-scroll{overflow:visible}.gvl-table,.gvl-field-group{page-break-inside:avoid}.gvl-letterhead{display:flex;align-items:center;gap:.75rem;padding:0 0 1rem;margin:0 1.5rem 1.5rem;border-bottom:2px solid var(--gvl-green-deep)}.gvl-letterhead strong{font-size:1.1rem;color:var(--gvl-green-deep)}.gvl-letterhead__meta{font-size:.78rem;color:var(--gvl-ink-soft)}body{background:#fff}.gvl-hero{background:none!important;border-bottom:none!important}a{color:var(--gvl-ink)!important;text-decoration:none!important}}