@charset "UTF-8";
:root{font-family:Inter,"Segoe UI",Arial,sans-serif;color:#18243c;background:#f8faff;font-synthesis:none;line-height:1.55;font-size:15px;--blue:#365dec;--line:#e1e7f1;--muted:#687790}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:4px}button{cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #92b6ff}[hidden]{display:none!important}.header{height:88px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 5%;gap:16px}.brand{display:flex;align-items:center;font-size:24px;letter-spacing:-.8px;font-weight:750;gap:11px}.brand-mark{display:grid;place-items:center;border-radius:12px;color:#fff;background:var(--blue);width:42px;height:42px;font-size:31px}.brand-caption{font-size:12px;color:var(--muted);font-weight:400;letter-spacing:0;border-left:1px solid var(--line);padding-left:15px;margin-left:7px}.header-link{font-size:13px;font-weight:600}.header-link span{color:var(--blue);margin-left:20px}.layout{max-width:1550px;margin:auto;display:grid;grid-template-columns:230px minmax(0,1fr);gap:48px;padding:34px 5% 0}.sidebar{padding-top:14px}.nav-label{font-size:10px;letter-spacing:1.8px;font-weight:700;color:#8a96aa;margin:0 0 16px 16px}.sidebar nav{display:grid;gap:7px}.sidebar nav a{display:flex;align-items:center;gap:12px;padding:12px 14px;font-size:13px;border-radius:9px}.sidebar nav a:hover,.sidebar nav a[aria-current]{background:#e9efff;color:#294fcf}.sidebar nav a>span{font-size:22px;min-width:24px}.sidebar nav small{margin-left:auto;color:#8a96aa;font-size:11px}.side-note{margin:32px 14px;font-size:12px;color:#8190a4;line-height:1.8;border-top:1px solid var(--line);padding-top:23px}.side-note>span{font-weight:700;color:#586c8d}.side-note p{font-size:11px}.content{min-width:0}.eyebrow{font-size:10px;letter-spacing:1.8px;color:var(--blue);font-weight:750;margin:16px 0 12px}h1{font-size:43px;line-height:1.16;letter-spacing:-1.8px;margin:0 0 16px;font-weight:720}h2{font-size:20px;line-height:1.3;letter-spacing:-.4px;margin:0}h3{margin:0;font-size:14px;line-height:1.4;font-weight:650}.lead{color:var(--muted);margin:0 0 28px;font-size:15px;line-height:1.75}.search-box{display:flex;align-items:center;gap:12px;padding:0 18px;background:#fff;border:1px solid #d5def0;border-radius:12px;height:59px;box-shadow:0 5px 15px #243c6910}.search-box>span{color:var(--blue);font-size:27px}.search-box input{width:100%;background:none;border:0;outline:0;font-size:14px;color:inherit}.search-box:focus-within{outline:2px solid #91adff}.search-box kbd{background:#f0f3fa;border:1px solid var(--line);padding:0 7px;border-radius:4px;color:#9ba7b9}.search-status{font-size:12px;color:var(--muted);margin-top:8px}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin:32px 0 17px}.section-heading>span{font-size:11px;color:var(--muted)}.section-heading>a{font-size:12px;color:var(--blue)}.popular-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.popular-grid a{display:flex;justify-content:space-between;gap:8px;border-radius:10px;padding:20px 14px;background:#edf2ff;border:1px solid #dfe7ff;color:#2449bf;font-size:12px}.popular-grid a:nth-child(2){background:#eff8f4;color:#238366;border-color:#dbeee4}.popular-grid a:nth-child(3){background:#fff5e9;color:#a66b28;border-color:#f3e5d0}.popular-grid a:nth-child(4){background:#f3effc;color:#7853a9;border-color:#e7dff5}.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.tool-card{padding:19px 16px;background:#fff;border:1px solid var(--line);border-radius:12px;display:flex;align-items:flex-start;gap:13px;transition:transform .15s,border-color .15s;min-width:0}.tool-card:hover{transform:translateY(-2px);border-color:#a8b9ed;box-shadow:0 6px 16px #365dec09}.card-icon{width:34px;height:34px;display:grid;place-items:center;border-radius:8px;background:#f1f5ff;color:#5275d5;font-size:21px;flex:none}.tool-card p{color:#7b889d;font-size:11px;line-height:1.6;margin:7px 0 0}.card-arrow{margin-left:auto;color:#92a2bb;flex:none}.global-author{margin-top:42px}.service-footer{margin-top:28px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:9px;color:#8793a7;font-size:11px;margin:5px 0 23px}.breadcrumbs a:hover{color:var(--blue)}.tool-title{font-size:34px;letter-spacing:-1px}.tool-lead{max-width:850px}.calculator-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:start}.input-panel,.result-panel{padding:24px;background:#fff;border:1px solid var(--line);border-radius:15px;min-width:0}.result-panel{background:#edf2ff;border-color:#dce5ff}.panel-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:22px}.panel-heading h2{font-size:15px;letter-spacing:0}.text-button{border:0;background:transparent;color:var(--blue);padding:0;font-size:12px}.status-dot{color:#7e9afb;font-size:10px}.fields{display:grid;grid-template-columns:1fr;gap:17px}.field{display:grid;gap:7px;min-width:0}.field>span{font-size:12px;font-weight:600}.field input,.field select,.field textarea{width:100%;border:1px solid #d7dfed;background:#fff;border-radius:8px;padding:10px 12px;min-height:44px;color:#1c2b46}.field textarea{resize:vertical;min-height:88px;font-family:inherit;font-size:13px}.field small{color:#8290a4;font-size:10px;line-height:1.6}.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid 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dd{text-align:right;margin:0;font-weight:650;overflow-wrap:anywhere;min-width:0}.steps,.notice{font-size:12px;color:#556d97;margin:20px 0 0}.steps{padding-left:18px}.copy{margin-top:25px}.empty-result{font-size:14px;color:#687fa8}.form-error{font-size:12px;color:#ac2839;background:#fff0f2;padding:12px;border-radius:8px}.formula{padding:21px 23px;background:#fff;border:1px solid var(--line);border-left:3px solid var(--blue);border-radius:9px;font-size:16px;line-height:1.8;overflow-wrap:anywhere}.explanation>p{font-size:13px;color:var(--muted);line-height:1.9}.example{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:15px;margin-top:20px}.example summary,.schedule summary{cursor:pointer;font-weight:600;color:#335daf}.example p{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.8}.sources{font-size:11px;color:var(--muted);margin-top:20px}.sources a{text-decoration:underline}.schedule{font-size:11px;margin-top:22px}.table-scroll{overflow:auto;margin-top:12px;max-height:420px}table{border-collapse:collapse;width:100%;font-size:11px}th,td{text-align:right;border-bottom:1px solid #d3def3;padding:8px;white-space:nowrap}th{background:#e4ecfd;position:sticky;top:0}.diagram{width:100%;max-height:220px;margin-top:10px;font-size:14px;font-family:inherit}.problem p{font-size:14px}.skip{position:absolute;left:-999px;top:0}.skip:focus{left:10px;z-index:1000;background:#fff;padding:10px}.related .tool-card p{display:none}.related .tool-card{align-items:center;padding:14px}.related h3{font-size:12px}#catalog{scroll-margin-top:20px}
@media(min-width:1500px){.layout{grid-template-columns:250px minmax(0,1fr)}}@media(max-width:1100px){.layout{padding:25px 4% 0;gap:25px;grid-template-columns:190px minmax(0,1fr)}.sidebar nav a{padding:10px 8px;font-size:12px;gap:8px}.brand-caption{display:none}.popular-grid{grid-template-columns:repeat(2,1fr)}.calculator-layout{gap:14px}.input-panel,.result-panel{padding:18px}.result-value{font-size:27px}}@media(max-width:800px){.header{height:72px;padding:0 5%}.brand{font-size:21px}.header-link{font-size:11px}.header-link span{margin-left:8px}.layout{display:block;padding:0 5%}.sidebar{padding:15px 0 20px}.sidebar .nav-label,.side-note{display:none}.sidebar nav{display:flex;gap:7px;overflow:auto;padding-bottom:5px}.sidebar nav a{white-space:nowrap;background:#fff;border:1px solid var(--line);padding:7px 10px;font-size:11px;gap:7px}.sidebar nav a>span{font-size:16px;min-width:16px}.sidebar nav small{display:none}h1{font-size:35px}.eyebrow{margin-top:8px}.tool-title{font-size:29px}.lead{font-size:14px}.calculator-layout{grid-template-columns:1fr}.result-panel{min-height:170px}.card-grid{grid-template-columns:1fr}.popular-grid{gap:10px}.popular-grid a{padding:17px 13px}.section-heading h2{font-size:19px}.section-heading>span{font-size:10px}.tool-card{padding:17px}.breadcrumbs{font-size:10px;margin-bottom:20px}.desktop{display:none}.search-box{height:55px}.search-box input{font-size:12px}.result-value{font-size:32px}.input-panel,.result-panel{padding:22px}.global-author{margin-top:32px}.related{grid-template-columns:1fr 1fr}.related .card-icon{display:none}.related h3{font-size:11px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}@media print{.header,.sidebar,.input-panel,.cookie-notice,.copy,.related,.service-footer,.skip{display:none!important}.layout{display:block;padding:0}.result-panel{break-inside:avoid}.calculator-layout{display:block}.global-author{margin-top:20px}body{background:#fff}.explanation details{display:block}a{color:#000}}
/* Large catalogue: topic navigation and readable forms. */
.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:22px 0 30px}.topic-grid a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:15px;background:#fff;border:1px solid var(--line);border-radius:10px;min-width:0}.topic-grid strong{font-size:13px;font-weight:600}.topic-grid span{font-size:12px;color:var(--muted)}.topic-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.topic-links a{font-size:12px;padding:6px 9px;border-radius:6px;background:#edf2ff;color:#3359bb}.pagination{display:flex;justify-content:center;align-items:center;gap:24px;margin:30px 0;font-size:14px}.pagination a{padding:9px 15px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--blue)}#more-search{display:block;margin:20px auto}.search-status{min-height:21px}.field>span{font-size:14px}.field small,.local-note{font-size:12px}.result-eyebrow,.extras>div,.steps,.notice{font-size:14px}.explanation>p{font-size:15px}.tool-card p{font-size:12px}.side-note{font-size:13px}.sources{font-size:12px}.formula{font-size:15px}.lead{font-size:16px}#search-results{margin-top:20px}.sidebar nav a{font-size:13px}.brand-caption{font-size:13px}
@media(max-width:1000px){.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:600px){.topic-grid{grid-template-columns:1fr 1fr;gap:8px}.topic-grid a{padding:12px 10px}.topic-grid strong{font-size:12px}.tool-title{font-size:27px;overflow-wrap:anywhere}.section-heading>span{display:none}.related{grid-template-columns:1fr}.sidebar nav a{font-size:12px}.pagination{gap:14px}.brand-caption{display:none}}