:root {
  --ink:#172033;
  --muted:#5f6b7a;
  --line:#dfe5ec;
  --brand:#075985;
  --brand-2:#0e7490;
  --accent:#f59e0b;
  --soft:#f6f9fc;
  --white:#fff;
  --max:1180px;
}
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0}.tag{display:inline-block;font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;font-weight:850;color:#0f766e;background:#ccfbf1;border-radius:999px;padding:.2rem .5rem}.learn-link{display:inline-block;margin-top:.8rem;font-weight:800}.article-hero{padding:3.5rem 0 2.7rem;background:linear-gradient(180deg,#f8fbfd,#fff);border-bottom:1px solid #edf1f5}.breadcrumbs{font-size:.9rem;color:#64748b;margin-bottom:1rem}.article-hero h1{font-size:clamp(2.5rem,4vw,4rem);line-height:1.05;letter-spacing:-.04em;margin:.4rem 0 1rem}.article-hero .lede{font-size:1.13rem;color:var(--muted);max-width:840px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:3rem;align-items:start}.article{padding:3rem 0 4rem}.article h2{margin-top:2.45rem;font-size:2rem;line-height:1.2;letter-spacing:-.025em}.article h3{margin-top:1.7rem}.article p,.article li{color:#334155}.article ul{padding-left:1.2rem}.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:.8rem;margin:1.4rem 0}.fact{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:1rem}.fact strong{display:block;color:#0f172a}.sidebar{position:sticky;top:94px;border:1px solid var(--line);border-radius:12px;padding:1rem;background:#fff}.sidebar h3{margin:.1rem 0 .6rem;font-size:1rem}.sidebar a{display:block;padding:.42rem 0;color:#475569;font-size:.93rem}.note{border-left:4px solid var(--brand-2);background:#ecfeff;padding:1rem 1.1rem;border-radius:0 8px 8px 0;margin:1.4rem 0}.warning{border-left-color:var(--accent);background:#fffbeb}.comparison{width:100%;border-collapse:collapse;margin:1.25rem 0}.comparison th,.comparison td{border:1px solid var(--line);padding:.75rem;text-align:left;vertical-align:top}.comparison th{background:#f8fafc}.matrix-demo{display:grid;grid-template-columns:repeat(18,12px);gap:2px;justify-content:center;padding:1.3rem;background:#fff;border:1px solid var(--line);border-radius:12px;width:max-content;max-width:100%;overflow:auto}.matrix-demo 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@media(max-width:900px){.hero-grid,.article-layout{grid-template-columns:1fr}.hero{padding-top:3.8rem}.card-grid{grid-template-columns:1fr 1fr}.sidebar{position:static}.footer-grid{grid-template-columns:1fr 1fr}.hero-card{max-width:680px}.nav-toggle{display:block}.nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:1rem 1.25rem;flex-direction:column;align-items:flex-start}.nav-links.open{display:flex}}
@media(max-width:620px){.container{width:min(calc(100% - 1.25rem),var(--max))}.card-grid,.facts,.related,.footer-grid,.mini-list{grid-template-columns:1fr}.section{padding:3.2rem 0}.hero{padding:3.2rem 0}.hero h1{font-size:2.8rem}.barcode-bars{height:120px;gap:2px;padding:10px}.matrix-demo{grid-template-columns:repeat(18,9px)}.matrix-demo span{width:9px;height:9px}}

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.barcode-example{margin:0 0 1.8rem;border:1px solid var(--line);border-radius:14px;background:#fff;padding:1.25rem;text-align:center;box-shadow:0 8px 24px rgba(15,23,42,.035)}
.barcode-example img{display:block;margin:0 auto;max-width:min(100%,720px);max-height:250px;object-fit:contain}
.barcode-example.square img{max-width:300px;max-height:300px}
.barcode-example figcaption{margin-top:.8rem;color:#64748b;font-size:.88rem;line-height:1.45}
.barcode-example .encoded{display:block;margin-top:.25rem;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:#334155}
.symbology-thumb{height:96px;display:flex;align-items:center;justify-content:center;margin:.1rem 0 .9rem;padding:.65rem;background:#f8fafc;border:1px solid #edf1f5;border-radius:10px;overflow:hidden}
.symbology-thumb img{max-width:100%;max-height:76px;object-fit:contain}
.symbology-thumb.square img{max-width:78px;max-height:78px}
.source-note{font-size:.88rem;color:#64748b;border-top:1px solid var(--line);padding-top:.7rem;margin-top:.7rem}

.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.guide-card{display:block;border:1px solid var(--line);border-radius:14px;padding:1.25rem;background:#fff;color:inherit;box-shadow:0 8px 24px rgba(15,23,42,.035);transition:transform .15s ease,box-shadow .15s ease}.guide-card:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 14px 30px rgba(15,23,42,.07)}.guide-card span{display:block;font-size:.7rem;letter-spacing:.09em;font-weight:850;color:var(--brand-2);margin-bottom:.45rem}.guide-card strong{display:block;font-size:1.15rem;color:var(--ink);margin-bottom:.35rem}.guide-card p{margin:0;color:var(--muted);font-size:.94rem}.article ol{padding-left:1.35rem}.article ol li{margin:.45rem 0}@media(max-width:900px){.guide-grid{grid-template-columns:1fr 1fr}}@media(max-width:620px){.guide-grid{grid-template-columns:1fr}}

.footer-credit{text-align:center;margin-top:1rem;font-size:.9rem;color:#94a3b8}.footer-credit a{color:#cbd5e1;font-weight:700}

.guide-figure{margin:1.5rem 0;border:1px solid var(--line);border-radius:14px;padding:1rem;background:#fff}.guide-figure img{width:100%;height:auto;display:block}.guide-figure figcaption{font-size:.88rem;color:var(--muted);margin-top:.65rem}.decision-box,.review-note{border:1px solid var(--line);background:#f8fafc;border-radius:12px;padding:1rem 1.1rem;margin:1.25rem 0}.review-note{font-size:.84rem;color:#64748b;margin-top:2.5rem}.checklist{list-style:none;padding-left:0!important}.checklist li{padding:.55rem .6rem .55rem 2rem;position:relative;border-bottom:1px solid #eef2f6}.checklist li:before{content:"✓";position:absolute;left:.55rem;color:#0f766e;font-weight:900}.big-list li{margin:.9rem 0!important}.wizard{max-width:820px;border:1px solid var(--line);border-radius:16px;padding:1.4rem;background:#f8fafc}.wizard-step{margin-bottom:1rem}.wizard-step label{display:block;font-weight:800;margin-bottom:.35rem}.wizard-step select{width:100%;padding:.8rem;border:1px solid #cbd5e1;border-radius:8px;background:#fff;font:inherit}.wizard-result{margin-top:1.2rem;background:#fff;border-radius:12px;padding:1rem;border:1px solid var(--line);min-height:70px}.wizard-result:empty:before{content:"Your educational shortlist will appear here.";color:#64748b}