:root{--bg:#f7f8fb;--card:#fff;--text:#151d31;--muted:#5d6881;--line:#d7deea;--accent:#2346c7;--accent2:#17359f;--accentSoft:#eef2ff;--ok:#087149;--error:#b42318;--focus:#7c3aed;--shadow:0 10px 30px rgba(25,35,60,.07)}
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0;font-size:.84rem;color:#5e4b09}header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}.bar{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:1.1rem;text-decoration:none}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent);color:#fff;font-weight:900}.bar nav{display:flex;gap:18px;align-items:center}.bar nav a{color:var(--text);text-decoration:none;font-size:.94rem}.bar nav a:hover{text-decoration:underline}.hero{padding:68px 0 42px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}.hero .wrap{max-width:920px;text-align:center}.tag{display:inline-block;border-radius:999px;background:var(--accentSoft);color:var(--accent2);padding:4px 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p{color:var(--muted);margin:0}.card.empty{display:none}.trust{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}.trustgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;padding:40px 0}.trust h3{margin:0 0 6px}.trust p{margin:0;color:var(--muted)}.layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:30px;padding:30px 0 70px}.breadcrumbs ol{display:flex;list-style:none;padding:0;margin:0 0 20px;gap:8px;color:var(--muted);font-size:.9rem}.breadcrumbs li+li:before{content:'›';margin-right:8px}.tool{background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(20px,4vw,40px);box-shadow:var(--shadow)}.tool h1{font-size:clamp(2rem,4vw,3.35rem);margin:12px 0}.lede{font-size:1.08rem;color:var(--muted);margin:0 0 24px}.calculator-form{background:var(--accentSoft);border:1px solid #d8e0ff;border-radius:16px;padding:18px;margin:22px 0 32px}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field{display:flex;flex-direction:column;gap:6px;min-width:0}.field-wide{grid-column:1/-1}.field label{font-weight:700;font-size:.9rem}.field input,.field select{width:100%;min-height:46px;border:1px solid #bcc7df;border-radius:10px;padding:9px 11px;background:#fff;color:var(--text)}.definition{margin:0;color:var(--muted);font-size:.87rem}.check-field{flex-direction:row;align-items:center;gap:10px}.check-field input{width:22px;min-height:22px}.check-field label{font-weight:600}.mini-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;border-top:1px solid #d5ddf2;padding-top:10px;margin-top:10px}.mini-row:first-child{border-top:0;padding-top:0;margin-top:0}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.btn{border:0;border-radius:10px;background:var(--accent);color:#fff;padding:10px 15px;min-height:46px;cursor:pointer;font-weight:750}.btn:hover{background:var(--accent2)}.btn.secondary{background:#fff;color:var(--accent2);border:1px solid #b9c5e6}.btn:disabled{opacity:.5;cursor:not-allowed}.result-wrap{margin-top:18px;background:#fff;border:1px solid #cad4eb;border-radius:13px;padding:15px}.result-label{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;font-weight:800;color:var(--muted)}.result{display:flex;flex-direction:column;gap:4px;min-height:54px;justify-content:center}.result .big{font-size:1.6rem;line-height:1.25}.result .error{color:var(--error);font-weight:700}.result-actions{display:flex;align-items:center;gap:12px;margin-top:10px}.copy-status{font-size:.85rem;color:var(--ok)}.content h2,.tool>h2{margin-top:34px;line-height:1.2}.content ul{padding-left:22px}.topic-links{background:#f8f9ff;border:1px solid var(--line);border-radius:12px;padding:12px 14px}.topic-links a{font-weight:650}.formula-box{background:#f8f9ff;border:1px solid var(--line);border-radius:12px;padding:10px 14px}.formula-box ul{margin:0;padding-left:22px}.formula-box code{font-size:.95em}.source-intro{color:var(--muted);margin-bottom:8px}.source-list{margin-top:0}.source-list a{font-weight:600}.note{border-left:4px solid var(--accent);background:#f4f6ff;padding:12px 14px;border-radius:0 10px 10px 0}.table-scroll{overflow-x:auto}.ref{width:100%;border-collapse:collapse}.ref th,.ref td{text-align:left;border-bottom:1px solid var(--line);padding:9px}.faq details{border-top:1px solid var(--line);padding:12px 0}.faq summary{cursor:pointer;font-weight:750}.faq p{color:var(--muted)}.related{display:flex;flex-wrap:wrap;gap:8px}.related a{border:1px solid var(--line);border-radius:999px;padding:7px 10px;text-decoration:none;background:#fff}.side{display:flex;flex-direction:column;gap:14px}.side .card{box-shadow:none}.ad{border:1px dashed #b9c4d9;background:#f9fafc;border-radius:14px;padding:22px;text-align:center;color:var(--muted);font-size:.9rem}.ad span{font-size:.8rem}.static{max-width:850px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:clamp(22px,5vw,48px);margin-top:36px;margin-bottom:70px;box-shadow:var(--shadow)}.static h1{font-size:clamp(2rem,4vw,3.2rem)}.static h2{margin-top:30px}footer{background:#11192b;color:#dfe5f3;padding:42px 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr;gap:30px}.footer-grid p{color:#aeb9cf}.links{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.links a,.link-button{color:#fff}.link-button{border:0;background:none;padding:0;font:inherit;text-decoration:underline;cursor:pointer}.footnote{border-top:1px solid #303a50;margin-top:25px;padding-top:18px;color:#9ba8c1;font-size:.84rem}.consent{position:fixed;left:16px;right:16px;bottom:16px;z-index:60;display:flex;align-items:center;justify-content:space-between;gap:18px;max-width:850px;margin:auto;background:#fff;border:1px solid #aebce8;border-radius:16px;box-shadow:0 18px 60px rgba(0,0,0,.24);padding:16px}.consent[hidden]{display:none}.consent-copy strong{display:block;font-size:1rem}.consent-copy p{margin:3px 0 0;color:var(--muted);font-size:.9rem}.consent-actions{display:flex;gap:8px;flex-shrink:0}
@media(max-width:850px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.layout{grid-template-columns:1fr}.side{display:grid;grid-template-columns:1fr 1fr}.trustgrid{grid-template-columns:1fr}.bar nav a:nth-child(n+3){display:none}}
@media(max-width:560px){.wrap{width:min(100% - 22px,1120px)}.bar{min-height:58px}.bar nav{gap:12px}.bar nav a{font-size:.86rem}.bar nav a:nth-child(n+2){display:none}.grid{grid-template-columns:1fr;padding-top:18px}.hero{padding:45px 0 25px}.fields,.mini-row{grid-template-columns:1fr}.mini-row{gap:8px}.side{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.tool{padding:18px}.consent{align-items:stretch;flex-direction:column}.consent-actions{width:100%}.consent-actions .btn{flex:1}}

.reference-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:18px 0 8px}.reference-card{display:block;border:1px solid var(--line);border-radius:16px;padding:18px;background:#fff;text-decoration:none;color:inherit}.reference-card:hover{text-decoration:none;border-color:#9bb0f3;box-shadow:0 8px 24px rgba(28,48,91,.08)}.reference-card h3{margin:0 0 7px;line-height:1.25}.reference-card p{margin:0;color:var(--muted)}.reference-guide .guide-note{border-left:4px solid var(--accent);background:#f4f6ff;padding:12px 14px;border-radius:0 10px 10px 0}.entity-note{font-size:.92rem;color:var(--muted)}@media(max-width:760px){.reference-grid{grid-template-columns:1fr}}
.section-head{margin:42px 0 16px}.topics{padding-top:8px;padding-bottom:18px}.hub-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.hub-card{display:flex;flex-direction:column;gap:6px;padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff;text-decoration:none;color:inherit}.hub-card:hover{text-decoration:none;border-color:#9bb0f3;box-shadow:0 8px 24px rgba(28,48,91,.08)}.hub-card span{color:var(--muted);font-size:.92rem;line-height:1.45}.reference-callout{margin:24px 0;padding:22px;border:1px solid #cad5ff;border-radius:18px;background:#f5f7ff}.reference-callout h2{margin-top:0}.method-card{margin:26px 0;padding:20px;border:1px solid var(--line);border-radius:16px;background:#fbfcff}.method-card h2{margin-top:0}.method-card dl{display:grid;gap:12px}.method-card dl div{display:grid;grid-template-columns:130px 1fr;gap:14px}.method-card dt{font-weight:750}.method-card dd{margin:0;color:var(--muted)}.hub-page .hub-tools{margin-top:10px}.reference-guide .source-list li{margin:.55rem 0}.source-list a{overflow-wrap:anywhere}@media(max-width:760px){.hub-grid{grid-template-columns:1fr}.method-card dl div{grid-template-columns:1fr;gap:3px}}

@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

.citation-card{margin:24px 0;padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:#fff}.citation-card h2{margin-top:0}.citation-card p{overflow-wrap:anywhere}.reference-callout a[download]{font-weight:700}
@media print{header,.consent,footer,.side,.ad,.actions,.search{display:none!important}body{background:#fff}.wrap{width:100%}.static,.tool{box-shadow:none;border:0;margin:0;padding:0}.reference-callout,.citation-card,.method-card{break-inside:avoid;background:#fff}.reference-guide a{color:#111;text-decoration:none}.reference-guide a[href^="http"]:after{content:" (" attr(href) ")";font-size:.82em}}

/* C1.1 UX foundation */
.ad{visibility:hidden;min-height:118px}
body[data-tool="oz-to-lbs"] .result-wrap,body[data-tool="meters-to-feet"] .result-wrap,body[data-tool="ratio-calculator"] .result-wrap,body[data-tool="days-between-dates"] .result-wrap,body[data-tool="tbsp-to-cups"] .result-wrap,body[data-tool="grams-to-cups"] .result-wrap{border:2px solid var(--accent);box-shadow:0 10px 28px rgba(35,70,199,.12);padding:18px 20px}
body[data-tool="oz-to-lbs"] .result .big,body[data-tool="meters-to-feet"] .result .big,body[data-tool="ratio-calculator"] .result .big,body[data-tool="days-between-dates"] .result .big,body[data-tool="tbsp-to-cups"] .result .big,body[data-tool="grams-to-cups"] .result .big{font-size:clamp(1.9rem,5vw,2.45rem)}
body[data-tool="oz-to-lbs"] .side .card,body[data-tool="meters-to-feet"] .side .card,body[data-tool="ratio-calculator"] .side .card,body[data-tool="days-between-dates"] .side .card,body[data-tool="tbsp-to-cups"] .side .card{display:none}


/* C1 final accepted focus batch */
body[data-tool="oz-to-lbs"] .result-wrap,body[data-tool="kg-to-lbs"] .result-wrap,body[data-tool="meters-to-feet"] .result-wrap,body[data-tool="cm-to-inches"] .result-wrap,body[data-tool="tbsp-to-cups"] .result-wrap,body[data-tool="ml-to-cups"] .result-wrap,body[data-tool="ml-to-oz"] .result-wrap,body[data-tool="grams-to-ounces"] .result-wrap,body[data-tool="kph-to-mph"] .result-wrap,body[data-tool="km-to-miles"] .result-wrap{border:2px solid var(--accent);box-shadow:0 10px 28px rgba(35,70,199,.12);padding:18px 20px}
body[data-tool="oz-to-lbs"] .result .big,body[data-tool="kg-to-lbs"] .result .big,body[data-tool="meters-to-feet"] .result .big,body[data-tool="cm-to-inches"] .result .big,body[data-tool="tbsp-to-cups"] .result .big,body[data-tool="ml-to-cups"] .result .big,body[data-tool="ml-to-oz"] .result .big,body[data-tool="grams-to-ounces"] .result .big,body[data-tool="kph-to-mph"] .result .big,body[data-tool="km-to-miles"] .result .big{font-size:clamp(1.9rem,5vw,2.45rem)}
body[data-tool="oz-to-lbs"] .layout,body[data-tool="kg-to-lbs"] .layout,body[data-tool="meters-to-feet"] .layout,body[data-tool="cm-to-inches"] .layout,body[data-tool="tbsp-to-cups"] .layout,body[data-tool="ml-to-cups"] .layout,body[data-tool="ml-to-oz"] .layout,body[data-tool="grams-to-ounces"] .layout,body[data-tool="kph-to-mph"] .layout,body[data-tool="km-to-miles"] .layout{grid-template-columns:minmax(0,1fr);max-width:920px}
body[data-tool="oz-to-lbs"] .side,body[data-tool="kg-to-lbs"] .side,body[data-tool="meters-to-feet"] .side,body[data-tool="cm-to-inches"] .side,body[data-tool="tbsp-to-cups"] .side,body[data-tool="ml-to-cups"] .side,body[data-tool="ml-to-oz"] .side,body[data-tool="grams-to-ounces"] .side,body[data-tool="kph-to-mph"] .side,body[data-tool="km-to-miles"] .side{display:none}
.focus-tools{padding-top:12px;padding-bottom:8px}.focus-tools .section-head{margin-bottom:14px}.focus-grid{padding:0 0 24px}.directory-intro .section-head{margin-top:20px;margin-bottom:0}.hub-priority-note{color:var(--muted);margin-top:-4px}