:root{
  color-scheme:light;
  --page:#F5F8FC;
  --surface:#FFFFFF;
  --surface-soft:#F8FAFC;
  --navy:#0B1830;
  --slate:#42526A;
  --muted:#66758C;
  --line:#DDE6EF;
  --line-strong:#C7D2E0;
  --green:#047857;
  --green-bright:#10B981;
  --green-soft:#ECFDF5;
  --blue:#1D4ED8;
  --warning:#92400E;
  --warning-soft:#FFFBEB;
  --danger:#B91C1C;
  --danger-soft:#FEF2F2;
  --shadow:0 16px 42px rgba(15,23,42,.07);
}
html[data-theme="dark"]{
  color-scheme:dark;
  --page:#08111F;
  --surface:#101A2A;
  --surface-soft:#162238;
  --navy:#F3F7FC;
  --slate:#CED8E6;
  --muted:#A4B1C3;
  --line:#2A3A51;
  --line-strong:#3C506D;
  --green:#5EE5B5;
  --green-bright:#34D399;
  --green-soft:#0A3025;
  --blue:#93C5FD;
  --warning:#FCD66D;
  --warning-soft:#2D250E;
  --danger:#FDA4AF;
  --danger-soft:#321518;
  --shadow:0 18px 46px rgba(0,0,0,.28);
}
*{box-sizing:border-box}
html{min-height:100%;scroll-behavior:smooth;background:var(--page)}
body{min-height:100vh;margin:0;display:flex;flex-direction:column;background:var(--page);color:var(--navy);font:16px/1.75 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:var(--green);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
button,a{touch-action:manipulation}
img{display:block;max-width:100%;height:auto}
.site-header{position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(14px)}
.header-inner,.page-shell,.site-footer{width:min(calc(100% - 32px),1120px);margin-inline:auto}
.header-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.header-brand{display:flex;align-items:center;gap:10px;min-width:0;color:var(--navy);text-decoration:none}
.brand-mark{width:42px;height:42px;flex:0 0 42px}
.brand-copy{display:grid;line-height:1.05}
.brand-copy strong{font-size:22px;font-weight:900;letter-spacing:-.04em}
.brand-copy strong span{color:var(--green)}
.brand-copy small{margin-top:4px;color:var(--muted);font-size:10px;font-weight:800;letter-spacing:.035em}
.header-actions{display:flex;align-items:center;gap:12px}
.header-nav{display:flex;align-items:center;gap:15px}
.header-nav a{color:var(--slate);text-decoration:none;font-size:13px;font-weight:800}
.header-nav a:hover{color:var(--green)}
.theme-toggle{width:42px;height:42px;padding:0;display:grid;place-items:center;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface);color:var(--navy);cursor:pointer}
.theme-toggle:hover{background:var(--surface-soft)}
.theme-icon{width:19px;height:19px}.theme-icon-sun{display:none}html[data-theme="dark"] .theme-icon-moon{display:none}html[data-theme="dark"] .theme-icon-sun{display:block}
.page-shell{flex:1;padding:34px 0 60px}
.breadcrumbs{margin:0 0 14px;color:var(--muted);font-size:13px}
.breadcrumbs ol{margin:0;padding:0;display:flex;flex-wrap:wrap;gap:7px;list-style:none}
.breadcrumbs li+li::before{content:"/";margin-right:7px;color:var(--line-strong)}
.breadcrumbs a{color:var(--slate);text-decoration:none}
.hero,.article-card,.resource-card,.cta-panel,.example-card{border:1px solid var(--line);border-radius:22px;background:var(--surface);box-shadow:var(--shadow)}
.hero{padding:clamp(26px,5vw,50px);display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.78fr);gap:34px;align-items:center}
.hero.no-image{grid-template-columns:1fr}
.eyebrow{margin:0 0 7px;color:var(--green);font-size:11px;font-weight:950;letter-spacing:.13em;text-transform:uppercase}
h1{max-width:820px;margin:0;font-size:clamp(34px,5.5vw,56px);line-height:1.04;letter-spacing:-.055em}
.hero-lead{max-width:760px;margin:18px 0 0;color:var(--slate);font-size:18px;line-height:1.7}
.hero-actions,.cta-actions{margin-top:24px;display:flex;align-items:center;flex-wrap:wrap;gap:10px}
.button{min-height:44px;padding:10px 16px;display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:12px;background:#0F172A;color:#FFF;text-decoration:none;font-size:14px;font-weight:850}
.button:hover{background:#1E293B;text-decoration:none}
.button.green{background:var(--green);color:#FFF}.button.green:hover{background:#065F46}
.button.secondary{border-color:var(--line-strong);background:var(--surface);color:var(--navy)}
.button.secondary:hover{background:var(--surface-soft)}
.hero-figure{margin:0;overflow:hidden;border:1px solid var(--line);border-radius:18px;background:var(--surface-soft)}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-figure figcaption{padding:9px 12px;color:var(--muted);font-size:12px}
.content-layout{margin-top:18px;display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:18px;align-items:start}
.article-card{padding:clamp(24px,4vw,42px)}
.article-card h2{margin:38px 0 10px;font-size:28px;line-height:1.25;letter-spacing:-.035em}
.article-card h2:first-child{margin-top:0}
.article-card h3{margin:26px 0 8px;font-size:19px;line-height:1.35}
.article-card p,.article-card li{color:var(--slate)}
.article-card ul,.article-card ol{padding-left:24px}
.article-card li+li{margin-top:8px}
.article-card strong{color:var(--navy)}
.article-card blockquote{margin:22px 0;padding:15px 18px;border-left:4px solid var(--green);border-radius:0 12px 12px 0;background:var(--green-soft);color:var(--slate)}
.sidebar{position:sticky;top:88px;display:grid;gap:14px}
.sidebar-card{padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--surface);box-shadow:var(--shadow)}
.sidebar-card h2{margin:0 0 10px;font-size:16px}
.sidebar-card ul{margin:0;padding:0;display:grid;gap:8px;list-style:none}
.sidebar-card a{color:var(--slate);font-size:13px;font-weight:750;text-decoration:none}
.sidebar-card a:hover{color:var(--green)}
.note,.warning,.formula{margin:20px 0;padding:16px 18px;border:1px solid #A7F3D0;border-radius:14px;background:var(--green-soft);color:var(--slate)}
.warning{border-color:#FDE68A;background:var(--warning-soft)}
.formula{border-color:var(--line-strong);background:var(--surface-soft);font-size:18px;font-weight:850;color:var(--navy);text-align:center}
.formula small{display:block;margin-top:5px;color:var(--muted);font-size:12px;font-weight:650}
.table-wrap{width:100%;margin:20px 0;overflow-x:auto;border:1px solid var(--line);border-radius:14px}
table{width:100%;min-width:660px;border-collapse:collapse;font-size:14px}
th,td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--surface-soft);color:var(--navy);font-size:12px;text-transform:uppercase;letter-spacing:.035em}td{color:var(--slate)}tr:last-child td{border-bottom:0}
.checklist{padding-left:0!important;display:grid;gap:10px;list-style:none}.checklist li{position:relative;padding-left:30px}.checklist li::before{content:"✓";position:absolute;left:0;top:2px;width:20px;height:20px;display:grid;place-items:center;border-radius:50%;background:var(--green-soft);color:var(--green);font-size:12px;font-weight:950}
.steps{counter-reset:step;display:grid;gap:14px}.step{position:relative;padding:18px 18px 18px 62px;border:1px solid var(--line);border-radius:15px;background:var(--surface-soft)}.step::before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:var(--green);color:#FFF;font-size:13px;font-weight:900}.step h3{margin:0 0 5px}.step p{margin:0}
.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.resource-card{padding:20px}.resource-card h2,.resource-card h3{margin:0 0 7px;font-size:19px}.resource-card p{margin:0;color:var(--slate);font-size:14px}.resource-card a{text-decoration:none}.resource-card a:hover{text-decoration:underline}
.example-card{margin:22px 0;padding:22px;background:var(--surface-soft)}.example-card h3{margin-top:0}.example-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.example-grid div{padding:13px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.example-grid span{display:block;color:var(--muted);font-size:11px;font-weight:800}.example-grid strong{display:block;margin-top:5px;font-size:17px}
.cta-panel{margin-top:18px;padding:28px 30px;background:linear-gradient(135deg,var(--surface),var(--green-soft))}.cta-panel h2{margin:0;font-size:25px}.cta-panel p{max-width:740px;margin:8px 0 0;color:var(--slate)}
.site-footer{padding:24px 0 38px;display:flex;align-items:flex-start;justify-content:space-between;flex-wrap:wrap;gap:14px 20px;color:var(--muted);font-size:12px}.footer-nav{display:flex;flex-wrap:wrap;gap:8px 14px}.footer-nav a{color:var(--slate);text-decoration:none}.footer-nav a:hover{color:var(--green)}
@media(max-width:900px){.hero{grid-template-columns:1fr}.content-layout{grid-template-columns:1fr}.sidebar{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}.example-grid{grid-template-columns:1fr 1fr}}
@media(max-width:700px){body{font-size:15px}.header-inner{min-height:64px}.header-nav a:not(:last-child){display:none}.brand-copy small{display:none}.page-shell{padding-top:22px}.hero,.article-card{border-radius:16px}.hero{padding:25px 20px;gap:22px}.hero-lead{font-size:16px}.article-card{padding:24px 20px}.article-card h2{font-size:24px}.cards,.sidebar{grid-template-columns:1fr}.example-grid{grid-template-columns:1fr}.hero-actions,.cta-actions{align-items:stretch}.button{width:100%}.site-footer{padding-bottom:28px}}
@media(max-width:430px){.header-inner,.page-shell,.site-footer{width:min(calc(100% - 22px),1120px)}.header-nav{display:none}.brand-copy strong{font-size:20px}.theme-toggle{width:39px;height:39px}.hero{padding:22px 17px}.article-card{padding:22px 17px}.cta-panel{padding:23px 19px}}