:root{--ink:#202e30;--muted:#61706e;--green:#166554;--green-light:#e9f2ec;--line:#dfe5df;--paper:#fafbf8;--white:#fff;--cream:#f2f1e9;--radius:16px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);background:var(--paper);font-family:Arial,'Malgun Gothic','Apple SD Gothic Neo',sans-serif;font-size:15px;line-height:1.65;word-break:keep-all}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #cf9f4b;outline-offset:5px}input:focus,select:focus{outline:2px solid var(--green);outline-offset:1px}.wrap{max-width:1120px;margin:auto;padding:0 28px}header{background:rgba(250,251,248,.97);border-bottom:1px solid var(--line)}.header-inner{max-width:1280px;margin:auto;padding:22px 36px;display:flex;align-items:center;gap:54px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:24px;font-weight:800;letter-spacing:-1px;white-space:nowrap}.brand svg{width:30px;height:30px;color:var(--green)}.brand-dot{color:var(--green)}nav{display:flex;gap:32px;font-size:14px;font-weight:600}nav a:hover{color:var(--green)}.header-note{margin-left:auto;font-size:12px;color:var(--muted)}.skip{position:absolute;left:20px;top:-80px;z-index:10;background:var(--green);color:white;padding:12px}.skip:focus{top:10px}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:70px;align-items:center;padding-top:64px;padding-bottom:60px}.eyebrow{font-size:11px;font-weight:700;letter-spacing:1.5px;color:var(--green);display:inline-flex;align-items:center;gap:9px}.status-dot{width:6px;height:6px;background:var(--green);border-radius:50%}h1,h2,h3,p{margin-top:0}h1{font-size:43px;line-height:1.35;letter-spacing:-2px;margin-bottom:20px;margin-top:15px}h2{font-size:27px;line-height:1.4;letter-spacing:-1px}h3{font-size:19px;letter-spacing:-.6px}.hero p{color:var(--muted);line-height:1.9;font-size:16px;margin-bottom:25px}.primary-link{display:inline-flex;align-items:center;gap:30px;color:white;background:var(--green);padding:12px 20px;border-radius:8px;font-weight:600;font-size:14px}.primary-link:hover,.primary:hover{background:#104d40}.hero-art{background:var(--green-light);border:1px solid #d8e5db;border-radius:20px;padding:26px 30px;transform:rotate(-2deg);box-shadow:10px 10px 0 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.wrap{display:flex;justify-content:space-between;padding-top:15px;padding-bottom:15px;max-width:880px;font-size:12px;color:#51695d}.directory{padding-top:52px;padding-bottom:55px}.section-heading{display:flex;align-items:center;justify-content:space-between}.section-heading h2{margin:8px 0 23px}.count{font-size:12px;color:var(--muted)}.category-nav{display:flex;gap:10px;padding-bottom:24px;border-bottom:1px solid var(--line)}.category-nav a{padding:8px 16px;border-radius:30px;border:1px solid var(--line);font-size:13px;background:#fff}.category-nav a:hover{border-color:var(--green);color:var(--green)}.category-nav span{margin-left:8px;color:var(--muted);font-size:11px}.category{padding-top:30px}.category h3{display:flex;align-items:center;gap:12px;margin-bottom:16px}.category-index{font:12px Arial;color:var(--green);background:var(--green-light);padding:5px;border-radius:5px}.category-desc{margin-left:auto;font-size:12px;font-weight:400;color:var(--muted);letter-spacing:0}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.tool-card{display:flex;gap:14px;align-items:center;min-height:102px;background:white;border:1px solid var(--line);border-radius:12px;padding:21px 17px;transition:border-color .15s,transform .15s}.tool-card:hover{border-color:var(--green);transform:translateY(-2px)}.tool-icon{width:38px;height:38px;flex:0 0 38px;display:grid;place-items:center;border-radius:10px;background:#f2f5f0;color:var(--green)}.tool-icon svg{width:23px;height:23px}.tool-copy{display:flex;flex-direction:column;gap:5px;flex:1;min-width:0}.tool-copy strong{font-size:15px;letter-spacing:-.5px}.tool-copy>span{font-size:11px;color:var(--muted);line-height:1.6}.arrow{color:#7b8a80;font-size:17px}.ad-slot{margin:36px 0;background:#f4f4ef;border:1px dashed 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0}details:last-child{padding-bottom:0}summary{font-size:13px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px}summary::after{content:'+';font-size:17px;color:var(--green)}details[open] summary::after{content:'−'}details p{font-size:12px;color:var(--muted);line-height:1.9;margin:14px 20px 0 0}.related-grid{display:grid;gap:10px}.related-grid .tool-card{min-height:80px;padding:15px 18px}.source-box{font-size:11px;color:var(--muted)}.source-box h3{font-size:14px;margin-bottom:9px}.source-box a{display:block;text-decoration:underline;text-underline-offset:3px;margin-bottom:7px}.prose{max-width:850px;padding-top:40px;padding-bottom:80px}.prose h1{font-size:34px;margin-top:25px}.prose h2{font-size:22px;margin-top:35px}.prose p{color:var(--muted);line-height:1.9}.back-link{font-size:12px;color:var(--green)}.notice{padding:15px;background:#fff1df;font-size:13px}
@media(max-width:900px){.header-inner{gap:35px;padding:18px 28px}.header-note{display:none}.hero{gap:35px}.hero h1{font-size:35px}.art-total{font-size:36px}.hero-art{padding:22px}.tool-grid{grid-template-columns:repeat(2,1fr)}.reading-layout{grid-template-columns:1fr;gap:0}.reading-aside{display:none}.fields{grid-template-columns:1fr}.calculator-layout{grid-template-columns:1fr 1fr}.category-desc{font-size:11px}.result-number>span{font-size:30px}}
@media(max-width:600px){html{scroll-padding-top:20px}.wrap{padding-left:20px;padding-right:20px}.header-inner{padding:16px 20px;gap:18px;justify-content:space-between;flex-wrap:wrap}.brand{font-size:22px}.brand svg{width:25px;height:25px}nav{gap:16px;font-size:11px}.hero{display:block;padding-top:40px;padding-bottom:36px}.hero h1{font-size:35px;letter-spacing:-1.6px;margin:15px 0 18px}.hero p{font-size:13px;margin-bottom:24px}.hero-art{display:none}.eyebrow{font-size:10px}.primary-link{padding:11px 17px}.trust-strip .wrap{gap:10px;justify-content:space-between;padding-top:13px;padding-bottom:13px;font-size:9px}.directory{padding-top:34px;padding-bottom:35px}.section-heading h2{font-size:24px}.count{font-size:10px}.category-nav{gap:7px}.category-nav a{font-size:11px;padding:7px 11px}.category-nav span{margin-left:5px}.category{padding-top:25px}.category h3{font-size:18px}.category-desc{display:none}.tool-grid{grid-template-columns:1fr;gap:9px}.tool-card{min-height:87px;padding:17px 16px}.tool-copy strong{font-size:15px}.tool-copy>span{font-size:11px}.editorial{display:block;padding-top:8px}.editorial h2{font-size:26px;margin:11px 0 19px}.editorial p{font-size:12px}.ad-slot{min-height:90px;margin:26px 0}.footer-inner{display:block;padding:27px 20px}.footer-inner>div:last-child{margin-top:20px}.footer-inner>div:last-child>a{font-size:11px;margin-right:15px}.footer-inner p{font-size:10px}.breadcrumbs{padding-top:18px;font-size:10px;gap:7px}.page-heading{padding:23px 0}.page-heading h1{font-size:29px;letter-spacing:-1.5px}.page-heading p{font-size:12px;line-height:1.8}.calculator-layout{display:block}.form-panel,.result-panel{padding:23px 20px}.fields{grid-template-columns:1fr;gap:16px}.field input{height:47px;font-size:16px}.field select{font-size:13px}.field label{font-size:12px}.form-actions{margin-top:21px}.result-panel{border-left:0;border-top:1px solid #d6e3d5}.result-top{margin-bottom:18px}.result-number>span{font-size:34px}.result-number{margin-bottom:21px}dl>div{font-size:12px}.result-note{font-size:11px}.reading-layout{padding-top:31px;padding-bottom:30px}.content-section{margin-bottom:26px;padding-bottom:24px}.content-section h2{font-size:21px}.content-section>p,.example-box p,.steps{font-size:12px}.formula-box{font-size:12px;padding:15px}.prose{padding-top:30px;padding-bottom:50px}.prose h1{font-size:27px}.prose p{font-size:13px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tool-card{transition:none}.tool-card:hover{transform:none}}
/* Language expansion and accessible conditional fields. */
[hidden]{display:none!important}.header-inner{gap:20px}.header-inner nav{margin-left:auto;flex-wrap:wrap;justify-content:flex-end}.language-link{font-weight:700;color:#166554}.footer-links{display:flex;flex-wrap:wrap;gap:12px 20px;max-width:650px}.footer-links p{flex-basis:100%}.field{min-width:0}.field select,.field input{max-width:100%}.unit{max-width:45%;font-size:12px}.result-number{flex-wrap:wrap;overflow-wrap:anywhere}.result-panel dl dd{text-align:right;overflow-wrap:anywhere}.time-card-fields{grid-template-columns:repeat(3,minmax(0,1fr))}.time-card-fields .field:last-child{grid-column:1/-1}.result-panel{align-self:start}.prose a{overflow-wrap:anywhere}.formula-box{overflow-wrap:anywhere}html[lang=en] .hero h1{font-size:clamp(38px,5vw,66px)}html[lang=en] .brand{font-size:23px}html[lang=en] .result-number{font-size:clamp(28px,4vw,44px)}
@media(max-width:600px){.header-inner{flex-wrap:wrap;gap:8px;padding-block:12px}.header-inner nav{gap:14px;margin-left:0;width:100%;justify-content:flex-start}.time-card-fields{grid-template-columns:repeat(2,minmax(0,1fr))}.time-card-fields .field:nth-child(3n+1){grid-column:1/-1;border-bottom:1px solid #e0e5df;padding-bottom:12px}.footer-links{gap:12px 16px}html[lang=en] .brand{font-size:21px}.result-panel dl>div{gap:12px}.unit{font-size:11px}.form-panel{padding:20px}.hero-art .art-line{font-size:16px}}
.time-card-fields .field[data-field="currency"]{grid-column:1/-1}