:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#182942;background:#f7f9fd;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.65}a{color:#2461c1;text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #8bb6ff;outline-offset:2px}.container{max-width:1160px;margin:auto;padding:0 24px}.skip{position:absolute;left:-100vw;top:0;background:#fff;padding:12px;z-index:10}.skip:focus{left:0}.site-header{background:#fff;border-bottom:1px solid #e3eaf4;position:sticky;top:0;z-index:20}.header-inner{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:72px}.logo{font-weight:850;font-size:20px;letter-spacing:-.8px;color:#16294c}.logo-mark{display:inline-grid;place-items:center;background:#2369db;color:white;width:34px;height:34px;border-radius:10px;margin-right:9px;font-size:19px}.nav{display:flex;gap:24px;flex-wrap:wrap}.nav a{font-size:14px;color:#455a74;font-weight:650}.hero{padding:52px 0 26px;text-align:center}.eyebrow{display:inline-block;background:#e8f0ff;color:#285fb2;border-radius:999px;padding:5px 14px;font-size:12px;font-weight:750;letter-spacing:.05em;text-transform:uppercase}.hero h1{font-size:clamp(36px,5vw,56px);line-height:1.15;letter-spacing:-2px;margin:15px 0}.hero p{max-width:710px;margin:0 auto;color:#53637b;font-size:17px}.tool-shell{background:#fff;border:1px solid #dce5f2;box-shadow:0 16px 50px rgba(29,63,114,.07);border-radius:22px;overflow:hidden;margin:20px 0 58px}.tool-title{font-weight:800;font-size:18px;margin:0 0 16px}.shape-bar{padding:26px 28px;border-bottom:1px solid #e9edf5}.shapes{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.shape-button{border:1px solid #dfe7f2;border-radius:12px;background:#fff;color:#263d5a;padding:11px 4px 9px;display:grid;justify-items:center;gap:5px;font-size:12px;font-weight:650}.shape-button:hover,.shape-button[aria-pressed="true"]{background:#edf4ff;border-color:#5690ec;color:#1957b4}.shape-button svg{width:43px;height:31px}.calculator-columns{display:grid;grid-template-columns:1fr 1fr}.input-side,.result-side{padding:30px}.input-side{border-right:1px solid #e8edf5}.input-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.field{display:flex;flex-direction:column;gap:6px;color:#3a4d67;font-size:13px;font-weight:700}.field input,.field select{min-width:0;width:100%;height:46px;border-radius:9px;border:1px solid #cfdbea;background:#fff;padding:0 12px;color:#162941}.field small{font-weight:400;color:#687a90}.action-row{display:flex;align-items:center;gap:10px;margin-top:19px}.btn{padding:12px 18px;border-radius:10px;border:1px solid #cfdbea;background:#fff;color:#2757a1;font-weight:750}.btn-primary{background:#2268db;color:#fff;border-color:#2268db}.btn:hover{filter:brightness(.96)}.result-side{background:linear-gradient(145deg,#fcfdff,#f0f6ff)}.visual{height:184px;display:flex;justify-content:center;align-items:center;background:#fff;border:1px solid #e2ebf7;border-radius:13px;margin-bottom:18px}.visual svg{width:min(95%,350px);height:168px}.result-label{font-size:12px;text-transform:uppercase;letter-spacing:.09em;color:#687b91;font-weight:800}.result-number{font-size:38px;font-weight:850;line-height:1.25;letter-spacing:-1.5px;color:#1e5dc5;overflow-wrap:anywhere}.muted{color:#62738c}.result-conversions{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin:15px 0}.conversion{background:#fff;border:1px solid #e2e9f3;border-radius:9px;padding:10px 12px}.conversion strong{display:block;font-size:15px}.conversion span{color:#687a8e;font-size:12px}.steps{background:#fff;border-top:1px solid #e6edf7;padding:21px 30px}.steps h3{margin:0 0 8px;font-size:16px}.steps p{margin:5px 0;color:#3c516e}.error{color:#bf2c2c;font-weight:650;font-size:14px;min-height:22px}.notice{font-size:13px;color:#697a92}.section{padding:50px 0;border-top:1px solid #e8eef6}.section h2{font-size:clamp(26px,3vw,34px);letter-spacing:-1px;margin:0 0 12px;line-height:1.3}.section-lede{color:#5b6c83;max-width:800px;margin:0 0 28px}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{background:#fff;border:1px solid #e0e8f4;border-radius:15px;padding:22px}.card h3{font-size:17px;margin:10px 0}.card p{color:#546781;margin:6px 0}.formula{font-family:Georgia,serif;font-size:21px;color:#1b58b5;background:#edf4ff;border-radius:8px;padding:9px 13px;display:inline-block}.formula-shape{display:block;width:120px;height:70px;margin-bottom:12px}.link-btn{display:inline-flex;border:none;background:none;padding:8px 0;font-weight:750;color:#1d60c7}.wide-card{background:#fff;border:1px solid #e0e8f4;padding:24px;border-radius:15px}.prose{max-width:800px}.prose h2{margin-top:38px;font-size:26px}.prose h3{margin-top:23px;font-size:20px}.prose p,.prose li{color:#425570}.prose table{border-collapse:collapse;width:100%}.prose th,.prose td{text-align:left;border:1px solid #dfe6f0;padding:11px}.prose th{background:#f1f5fb}.numbered{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.numbered .num{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;background:#e8f1ff;color:#215fbe;font-weight:850}.scroll-x{overflow-x:auto}.data-table{width:100%;border-collapse:collapse;background:#fff;border-radius:13px;overflow:hidden}.data-table th,.data-table td{text-align:left;border-bottom:1px solid #e3e9f1;padding:14px 17px}.data-table th{background:#eaf1fc}.callout{background:#ecf4ff;border-left:4px solid #2874e0;padding:19px 22px;border-radius:7px}.faq details{background:#fff;border:1px solid #e0e8f4;border-radius:12px;padding:15px 20px;margin:10px 0}.faq summary{cursor:pointer;font-weight:750}.faq p{color:#53657d}.footer{background:#182b47;color:#d1deef;padding:44px 0;margin-top:56px}.footer a{color:#d1deef}.footer-grid{display:flex;justify-content:space-between;gap:25px;flex-wrap:wrap}.footer-links{display:flex;gap:16px;flex-wrap:wrap}.breadcrumb{font-size:13px;color:#6e7e92;margin:29px 0}.article-head{padding:14px 0 30px}.article-head h1{max-width:850px;font-size:clamp(32px,4vw,48px);line-height:1.15;letter-spacing:-1px;margin:14px 0}.article-head p{max-width:750px;color:#536782;font-size:18px}.article-layout{display:grid;grid-template-columns:minmax(0,800px) 1fr;gap:35px}.article-body{background:#fff;padding:30px;border-radius:16px;border:1px solid #e3e9f3}.sidebar{align-self:start;position:sticky;top:100px;background:#fff;padding:22px;border:1px solid #e2eaf4;border-radius:14px}.blog-card h3{margin-top:5px}.blog-meta{color:#687b93;font-size:12px}.article-cta{background:#edf5ff;border:1px solid #c8ddfb;padding:18px 22px;border-radius:12px;margin:24px 0}.article-cta a{font-weight:800}.text-link{text-decoration:underline;text-underline-offset:3px}@media(max-width:900px){.shapes{grid-template-columns:repeat(4,1fr)}.article-layout{grid-template-columns:1fr}.sidebar{position:static}.card-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:650px){.container{padding:0 16px}.header-inner{min-height:65px}.nav{gap:12px}.nav a{font-size:12px}.hero{padding:34px 0 12px}.hero h1{letter-spacing:-1px}.hero p{font-size:15px}.tool-shell{margin-bottom:35px}.shape-bar{padding:18px}.shapes{grid-template-columns:repeat(3,minmax(0,1fr))}.calculator-columns{grid-template-columns:1fr}.input-side,.result-side{padding:20px}.input-side{border-right:0;border-bottom:1px solid #e6edf6}.steps{padding:18px 20px}.result-number{font-size:33px}.section{padding:34px 0}.card-grid,.numbered{grid-template-columns:1fr}.article-body{padding:20px}.footer-grid{display:block}.footer-links{margin-top:14px}}

/* Editorial components: each article chooses its own arrangement */
.answer-box{background:#eaf3ff;border:1px solid #c6dcfa;border-left:4px solid #3474d5;border-radius:10px;padding:18px 22px;margin:15px 0 28px}
.answer-box>strong{display:block;color:#1b4b89;font-size:14px;margin-bottom:5px}
.answer-box p{margin:0;color:#284663}
.lead-answer{font-size:19px;line-height:1.7;color:#24446e!important;border-left:4px solid #3774d5;padding-left:17px;margin:0 0 28px}
.diagram-card{margin:28px 0;background:#f6faff;border:1px solid #dce8f7;border-radius:14px;overflow:hidden}
.diagram-card svg{display:block;width:100%;height:auto;max-height:310px;margin:auto}
.diagram-card figcaption{font-size:13px;color:#61738b;padding:9px 16px 17px;line-height:1.5}
.math-work{background:#f3f7fc;padding:17px 22px;border-radius:12px;border:1px solid #e0e9f4;margin:22px 0}
.math-work p{font-size:16px;font-variant-numeric:tabular-nums;margin:7px 0}
.formula-display{font-size:clamp(18px,2.6vw,27px);text-align:center;background:#eff5ff;padding:20px;border-radius:10px;color:#1d579d;overflow-wrap:anywhere}
.readable-steps{padding-left:23px}.readable-steps li{padding:5px 0}
.compare-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:23px 0}.compare-row>div{background:#f0f6ff;padding:19px;border:1px solid #d6e5fa;border-radius:12px}.compare-row strong,.compare-row span{display:block}.compare-row span{font-size:14px;margin-top:6px;color:#50647e}
.check-panel{background:#f7f9fc;border-left:4px solid #5683c1;padding:16px 20px;margin:22px 0;border-radius:8px}.check-panel ul{margin-bottom:0;padding-left:22px}
.article-end-nav{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:25px;padding-top:20px;border-top:1px solid #e5eaf2;font-weight:750}
.editorial-note{background:#fafbfe;padding:14px 18px;color:#61738a;border:1px solid #e7edf6;font-size:13px;border-radius:10px;margin-top:35px}
.big-formula{font-size:23px!important;color:#195cae!important;font-family:Georgia,serif}
.minor-label{text-transform:uppercase;font-size:12px;letter-spacing:.07em;font-weight:800}
.sidebar hr{border:0;border-top:1px solid #e1e7ef;margin:19px 0}.sidebar ul,.sidebar ol{padding-left:22px}.sidebar li{font-size:14px;margin-bottom:9px}
.article-body section{margin-bottom:30px}.article-body h2{line-height:1.28;letter-spacing:-.35px}.article-body h3{line-height:1.35}.article-body p{line-height:1.78}
.article-body a{text-decoration:underline;text-underline-offset:3px}.article-body a:hover{text-decoration-thickness:2px}
.article-body .data-table{font-size:14px;min-width:480px}.article-body .data-table td,.article-body .data-table th{padding:11px 12px}
.source-note{font-size:13px;color:#64748b}.compact-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.compact-cards .card{padding:15px}.compact-cards h3{margin:5px 0}
@media(max-width:650px){.compare-row,.compact-cards{grid-template-columns:1fr}.diagram-card{margin:22px 0}.article-body h2{font-size:23px}.article-body h3{font-size:18px}}