@layer reset,base,layout,components,responsive,audit;
@layer audit{@media(max-width:760px){.header-inner nav a:nth-child(2){display:none}}@media(max-width:470px){.header-inner nav a:last-child{display:none}}}
@layer reset{*{box-sizing:border-box}body,h1,h2,h3,p{margin:0}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}img,svg{max-width:100%}button{cursor:pointer}a{color:inherit}button:disabled{cursor:default;opacity:.5}[hidden]{display:none!important}}
@layer base{:root{--ink:#182337;--muted:#596579;--blue:#2855ec;--line:#e2e7ef;--surface:#f5f7fb;--radius:18px}html{scroll-behavior:smooth;scroll-padding-top:24px}body{font-family:Inter,'Segoe UI',Arial,sans-serif;color:var(--ink);background:#fff;font-size:16px;line-height:1.65}h1,h2,h3{line-height:1.15;letter-spacing:-.035em}h1{font-size:clamp(2.3rem,4.8vw,4rem);font-weight:750}h2{font-size:clamp(1.7rem,2.5vw,2.25rem);font-weight:700}h3{font-size:1.05rem;letter-spacing:-.02em}p{color:var(--muted)}a{text-decoration:none}a:hover{color:var(--blue)}:focus-visible{outline:3px solid #173abd;outline-offset:4px}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline-offset:3px}.icon{width:22px;height:22px;flex-shrink:0;vertical-align:middle}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;top:-100px;left:20px;background:var(--ink);color:#fff;padding:12px 20px;z-index:100}.skip:focus{top:8px}.eyebrow{font-size:.75rem;font-weight:750;letter-spacing:.12em;color:#4c6082;margin-bottom:14px}.lead{font-size:1.125rem;max-width:740px;margin-top:18px;line-height:1.7}.text-link{color:var(--blue);font-weight:650;display:inline-flex;gap:10px;align-items:center}.text-link:hover{text-decoration:underline}button{border:0}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;background:var(--blue);color:#fff;padding:14px 22px;border-radius:10px;min-height:48px;font-weight:650}.button:hover{background:#1a42c8;color:#fff}.secondary-button{background:#eff2f8;border:1px solid var(--line);color:var(--ink);padding:12px 18px;border-radius:10px;min-height:48px}.secondary-button:hover{background:#e1e7f2}.link-button{background:none;color:var(--muted);text-align:left;padding:0;text-decoration:underline;min-height:44px}.container{width:min(1180px,calc(100% - 64px));margin-inline:auto}.section{padding-top:64px;padding-bottom:64px}}
@layer layout{.site-header{border-bottom:1px solid var(--line);background:#fff}.header-inner{display:flex;align-items:center;gap:48px;height:88px}.brand{display:inline-flex;align-items:center;font-size:1.5rem;font-weight:760;letter-spacing:-.055em;white-space:nowrap}.brand img{margin-right:10px}.brand span{font-weight:450}.header-inner nav{display:flex;gap:32px;font-size:.9rem;font-weight:600;margin-left:auto}.header-inner nav a{padding:12px 0}.header-search{display:flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;font-size:.875rem}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:54px;align-items:center;padding-top:64px;padding-bottom:56px}.hero h1{font-size:clamp(2.8rem,4.8vw,4.2rem);line-height:1.06}.hero h1 span{color:var(--blue)}.hero-description{font-size:1.075rem;max-width:510px;line-height:1.8;margin:24px 0 28px}.hero-art{position:relative;align-self:stretch;display:flex;flex-direction:column;justify-content:center}.hero-art img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;border-radius:22px}.art-caption{text-align:center;color:#68758a;font-size:.75rem;letter-spacing:.03em;margin-top:14px}.visual-equation{padding:60px;background:#eaf0ff;border-radius:24px}.visual-equation strong{display:block;font-size:3rem;color:var(--blue)}.trust-strip{border-block:1px solid var(--line);background:#fafbfe}.trust-strip .container{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:19px}.trust-strip span{display:flex;gap:10px;align-items:center;font-size:.86rem;color:#49576c}.trust-strip .icon{color:#4165c3;width:19px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:28px}.section-heading .eyebrow{margin-bottom:10px}.section-heading>p{font-size:.9rem}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.category-section{background:#f6f8fc;border-block:1px solid #eef1f7}.category-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.feature-band{display:grid;grid-template-columns:1fr 1fr;gap:75px;background:#edf2fe;border:1px solid #dce5ff;border-radius:24px;padding:48px}.feature-band h2{font-size:2.5rem}.feature-band p:not(.eyebrow){margin-top:20px;margin-bottom:24px}.feature-band .eyebrow{color:#3657a1}.sample-chart{background:#fff;border-radius:16px;padding:24px;align-self:center;border:1px solid #dfe6f5;box-shadow:0 12px 32px #183d8510}.chart-top,.chart-bottom{display:flex;justify-content:space-between;font-size:.75rem;color:var(--muted)}.chart-top span:first-child{font-weight:650;color:var(--ink)}.mini-bars{height:135px;display:flex;align-items:end;gap:12px;margin:24px 0 12px;border-bottom:1px solid #dae1ef;padding-bottom:0}.mini-bars i{flex:1;background:#c1d0ff;border-radius:6px 6px 0 0}.mini-bars i:nth-last-child(2){background:#6c8ef5}.mini-bars i:last-child{background:var(--blue)}.sample-chart p{font-size:.75rem;margin:14px 0 0!important}.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;padding-block:50px}footer{background:#fafbfe;border-top:1px solid var(--line)}.footer-top p{font-size:.875rem;margin-top:14px}.footer-top strong{display:block;font-size:.875rem;margin-bottom:14px}.footer-top>div>a:not(.brand){display:block;font-size:.875rem;color:var(--muted);padding:6px 0}.footer-top>div>a:hover{text-decoration:underline;color:var(--blue)}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-block:21px;font-size:.75rem;color:var(--muted)}}
@layer components{.search-form{display:flex;align-items:center;gap:12px;padding:7px 7px 7px 18px;border:1px solid #c9d2e3;border-radius:12px;background:#fff;box-shadow:0 4px 16px #20357108;position:relative}.search-form>.icon{color:#7b889d}.search-form input{border:0;width:100%;min-width:0;font-size:.925rem;color:var(--ink);background:none;min-height:44px}.search-form button{width:46px;height:46px;background:var(--blue);color:#fff;border-radius:8px;flex-shrink:0}.search-form:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px #2855ec14}.quick-search{display:flex;gap:10px;align-items:center;font-size:.8rem;margin-top:14px}.quick-search>span{color:var(--muted)}.quick-search a{background:#f1f4fa;border:1px solid #e9edf5;padding:4px 10px;border-radius:6px}.search-results{position:relative;z-index:4;border:1px solid var(--line);background:white;box-shadow:0 12px 32px #162b5112;border-radius:12px;padding:14px;margin-top:10px}.search-results p{font-size:.875rem}.search-results a{display:flex;justify-content:space-between;align-items:center;padding:10px;border-radius:6px;min-height:44px}.search-results a:hover{background:#f0f4ff}.search-results a span{color:var(--muted);font-size:.75rem}.tool-card{display:flex;align-items:flex-start;gap:15px;border:1px solid var(--line);padding:23px 21px;border-radius:14px;background:#fff;transition:border-color .15s,box-shadow .15s}.tool-card:hover{border-color:#a7b9ef;box-shadow:0 5px 18px #19375a08}.tool-card h3{font-size:1rem;margin:2px 0 10px;line-height:1.4;letter-spacing:-.02em}.tool-card p{font-size:.85rem;line-height:1.6}.tool-card>div{min-width:0}.tool-icon{width:43px;height:43px;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;border-radius:11px}.tool-icon .icon{width:23px;height:23px}.blue{background:#edf2ff;color:#315bdd}.purple{background:#f0ecff;color:#7951c9}.orange{background:#fff2e4;color:#b96917}.pink{background:#ffedf2;color:#c74a78}.green{background:#e8f6ee;color:#287451}.card-arrow{display:none}.category-card{background:white;border:1px solid var(--line);border-radius:14px;padding:24px;display:flex;flex-direction:column}.category-card:hover{border-color:#afc2ef}.category-card h3{font-size:1.1rem;margin-top:21px;margin-bottom:12px}.category-card p{font-size:.875rem;margin-bottom:26px;line-height:1.7;flex:1}.category-count{display:flex;justify-content:space-between;align-items:center;color:#5b687b;font-size:.8rem}.category-count .icon{width:18px}.breadcrumbs{font-size:.8rem;margin-top:26px;color:#526074}.breadcrumbs ol{display:flex;list-style:none;gap:8px;flex-wrap:wrap;padding:0;margin:0}.breadcrumbs li{display:flex;align-items:center;gap:8px}.breadcrumbs li+li:before{content:'/';color:#a9b1bf}.breadcrumbs a{text-decoration:underline;text-underline-offset:3px}.directory{padding-top:36px}.directory>.search-form{max-width:720px;margin-top:28px}.directory>.search-results{max-width:720px}.filter-row{display:flex;gap:9px;flex-wrap:wrap;margin:28px 0 20px}.filter{display:inline-flex;align-items:center;gap:8px;border:1px solid #dce3ef;background:#fff;border-radius:30px;padding:9px 16px;color:#516077;font-size:.875rem;min-height:44px}.filter.active,.filter:hover{color:#244dc9;background:#edf2ff;border-color:#b5c6fb}.filter span{background:#dce6ff;border-radius:20px;padding:0 7px;font-size:.75rem}#directory-status{font-size:.85rem;margin-bottom:20px}.category-page{padding-top:36px}.category-page>.tool-icon{margin-bottom:20px}.category-page>.tool-grid{margin-top:36px}.category-guide{border-top:1px solid var(--line);padding-top:36px;margin:40px 0}.category-guide h2{font-size:1.6rem;margin-bottom:18px}.category-guide p{max-width:820px}.tool-intro{padding:32px 0}.tool-intro h1{font-size:clamp(2rem,4vw,3.1rem);margin-top:18px}.category-label{display:inline-flex;align-items:center;gap:8px;border-radius:20px;padding:5px 12px;font-size:.75rem;font-weight:650}.category-label .icon{width:15px;height:15px}.calculator{border:1px solid #d9e1ef;border-radius:20px;display:grid;grid-template-columns:1.15fr 1fr;box-shadow:0 12px 36px #17326906;overflow:hidden}.calculator form{padding:32px}.form-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;gap:12px}.form-heading h2{font-size:1.2rem}.form-heading>span{font-size:.75rem;color:var(--muted)}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px 20px}.field label{display:flex;justify-content:space-between;gap:8px;font-weight:600;font-size:.875rem;margin-bottom:8px}.field label span{font-size:.75rem;color:var(--muted);font-weight:400}.field input,.field select,.field textarea{border:1px solid #bfcadc;border-radius:9px;width:100%;padding:12px 13px;background:white;color:var(--ink);min-height:49px;min-width:0}.field textarea{resize:vertical;line-height:1.6}.field.full{grid-column:1/-1}.form-actions{display:flex;gap:12px;margin-top:28px}.form-error{color:#a52230;padding:12px;background:#fff2f2;border-radius:8px;margin-top:20px;font-size:.875rem}.result-panel{padding:32px;background:#edf2ff;display:flex;flex-direction:column}.result-panel>.eyebrow{color:#4b64a6}.result-value{font-size:clamp(2rem,3.2vw,3rem);letter-spacing:-.04em;font-weight:750;line-height:1.3;color:#244dca;margin:12px 0;overflow-wrap:anywhere;font-variant-numeric:tabular-nums;white-space:pre-wrap}.result-value.text-result{font-size:1.15rem;letter-spacing:0;line-height:1.7;max-height:360px;overflow:auto;background:white;padding:16px;border-radius:8px;user-select:all}.result-value.secret{font-family:monospace;user-select:all}.result-label{font-size:.875rem}.result-unit{font-size:1rem;color:#435b91;letter-spacing:0;margin-left:8px;font-weight:500}.result-details{display:grid;gap:12px;border-top:1px solid #cdd9f3;padding-top:18px;margin:22px 0}.result-details>div{display:flex;justify-content:space-between;gap:20px;align-items:baseline;font-size:.875rem}.result-details dt{color:#556784}.result-details dd{margin:0;color:#203553;font-weight:650;text-align:right;overflow-wrap:anywhere}.result-note{font-size:.8rem;line-height:1.7}.result-actions{display:flex;gap:16px;margin-top:auto;padding-top:24px}.result-actions button{background:transparent;border:1px solid #acbce3;color:#3151a3;border-radius:7px;font-size:.8rem;padding:9px 14px;min-height:44px}.result-actions button:hover{background:#e0e9ff}.result-footnote{font-size:.75rem;margin-top:18px;color:#597096}.tool-content{display:grid;grid-template-columns:1.6fr 1fr;gap:80px;padding-top:56px;padding-bottom:64px}.tool-content article h2{font-size:1.45rem;margin:34px 0 17px}.tool-content article h2:first-child{margin-top:0}.tool-content article p,.steps{font-size:.975rem;line-height:1.85}.steps{padding-left:23px;color:var(--muted)}.steps li{padding-left:7px;margin:9px 0}.example-box{background:#f4f7fc;border-left:3px solid #6b8af0;padding:22px 25px;border-radius:0 12px 12px 0;margin-top:24px}.example-box .eyebrow{display:block;margin-bottom:10px}.source{margin-top:16px}.source a,.prose a,.editorial-note a{color:var(--blue);text-decoration:underline}.related{padding:26px;background:#fafbfe;border:1px solid var(--line);border-radius:16px;align-self:start}.related h2{font-size:1.25rem;margin-bottom:22px}.related .tool-card{padding:17px 0;border:0;border-top:1px solid var(--line);border-radius:0;background:transparent}.related .tool-card:hover{box-shadow:none}.related .tool-card p{font-size:.8rem}.related .tool-icon{width:34px;height:34px}.related .tool-icon .icon{width:18px}.related>.text-link{font-size:.875rem;margin-top:20px}details{border-bottom:1px solid var(--line);padding:17px 0}summary{cursor:pointer;font-weight:600;padding:5px 0;min-height:32px}details p{margin-top:12px}.editorial-note{margin-top:32px;font-size:.8rem!important;color:#526074}.prose{max-width:800px}.prose h1{margin-bottom:20px}.prose h2{font-size:1.5rem;margin:32px 0 15px}.prose p{margin-bottom:18px}.prose .button{margin-top:25px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:0;border-radius:9px;background:var(--ink);color:white;max-width:calc(100% - 32px);z-index:100;text-align:center;font-size:.875rem}#toast:not(:empty){padding:12px 20px}.notice{padding:20px;background:#fff4df;border-radius:10px;margin-top:20px}.chart-card{border:1px solid var(--line);border-radius:16px;margin-top:24px;padding:28px}.chart-card h2{font-size:1.25rem;margin-bottom:16px}.chart-card svg{width:100%;height:auto;max-height:240px}.chart-labels{display:flex;justify-content:space-between;font-size:.8rem;color:var(--muted)}.table-wrap{overflow:auto;margin-top:20px}table{width:100%;border-collapse:collapse;font-size:.875rem}th,td{text-align:right;padding:12px;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}th:first-child,td:first-child{text-align:left}th{background:#f2f5fb}caption{text-align:left;font-weight:600;padding:10px 0}.ad-slot:not([hidden]){min-height:250px;margin-block:24px;border:1px solid var(--line)}}
@layer responsive{@media(min-width:1400px){.container{width:min(1240px,calc(100% - 100px))}.hero{gap:75px}}@media(max-width:1020px){.header-inner{gap:22px}.header-inner nav{gap:22px}.hero{gap:30px}.hero h1{font-size:3rem}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-band{gap:35px;padding:32px}.tool-content{gap:32px;grid-template-columns:1.5fr 1fr}.calculator form,.result-panel{padding:24px}.footer-top{grid-template-columns:1.4fr 1fr;gap:30px}}@media(max-width:760px){.container{width:calc(100% - 36px)}.header-inner{height:74px;gap:18px}.brand{font-size:1.35rem}.header-inner nav{gap:18px;margin-left:auto}.header-inner nav a{font-size:.8rem}.header-inner nav a:nth-child(2){display:none}.header-search{padding:8px;min-height:42px}.header-search span{display:none}.hero{grid-template-columns:1fr;padding-top:38px;padding-bottom:30px;gap:28px}.hero h1{font-size:3.2rem}.hero-description{margin:20px 0;font-size:1rem}.hero-art{max-width:540px;width:100%;margin-inline:auto}.hero-art img{aspect-ratio:2.15;object-fit:cover}.art-caption{font-size:.75rem;margin-top:9px}.trust-strip .container{justify-content:center;flex-wrap:wrap;gap:12px 20px;padding-block:17px}.trust-strip span{font-size:.75rem}.trust-strip span:nth-child(2){order:3;width:100%;justify-content:center}.section{padding-block:40px}.section-heading{align-items:flex-start;gap:16px;flex-direction:column}.section-heading h2{font-size:1.9rem}.section-heading .text-link{font-size:.875rem}.tool-grid{gap:12px}.tool-card{padding:18px;gap:12px}.tool-card h3{font-size:.95rem}.tool-icon{width:36px;height:36px}.tool-card p{font-size:.82rem}.category-grid{gap:12px}.category-card{padding:20px}.category-card h3{font-size:1rem}.category-card p{font-size:.82rem}.feature-band{grid-template-columns:1fr;gap:28px;padding:28px}.feature-band h2{font-size:2rem}.sample-chart{padding:20px}.calculator{grid-template-columns:1fr}.tool-intro{padding-block:26px}.tool-intro h1{font-size:2.2rem}.tool-intro .lead{font-size:1rem}.result-panel{min-height:280px}.tool-content{grid-template-columns:1fr;padding-top:36px;padding-bottom:40px}.related{order:2}.footer-top{gap:28px;padding-block:36px}.footer-bottom{gap:16px;flex-wrap:wrap}.breadcrumbs{font-size:.75rem;margin-top:20px}.field-grid{gap:18px 14px}.field label{font-size:.85rem}.form-heading>span{font-size:.75rem}.directory h1{font-size:2.4rem}.category-page h1{font-size:2.4rem}.chart-card{padding:20px}.result-value{font-size:2.8rem}.prose h1{font-size:2.5rem}}@media(max-width:470px){.tool-grid{grid-template-columns:1fr}.hero h1{font-size:2.8rem}.header-inner{gap:12px}.header-inner nav{gap:14px}.header-inner nav a:last-child{display:none}.brand img{width:30px;height:30px;margin-right:7px}.hero-art img{aspect-ratio:2}.category-card{padding:18px}.category-card p{font-size:.8rem}.field-grid{grid-template-columns:1fr}.calculator form,.result-panel{padding:22px}.form-heading{align-items:flex-start;flex-direction:column;gap:6px}.footer-top{grid-template-columns:1fr 1fr}.footer-top>div:first-child{grid-column:1/-1}.quick-search{gap:7px}.quick-search a{padding:5px 9px}.search-form input{font-size:.85rem}.tool-card h3{font-size:1rem}.tool-card p{font-size:.875rem}.tool-icon{width:42px;height:42px}.search-results a{gap:10px}.search-results a span{display:none}.filter{font-size:.8rem;padding:8px 12px}.result-value{font-size:2.4rem}.result-details>div{gap:14px}.feature-band .button{width:100%;font-size:.875rem;gap:10px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}}
@layer audit{.tool-card p,.category-card p,.related .tool-card p{font-size:.875rem}.field label{font-size:.875rem}.quick-search a{min-height:44px;display:inline-flex;align-items:center}.header-inner nav a{min-height:44px;display:inline-flex;align-items:center}.footer-top>div>a:not(.brand){min-height:44px;display:flex;align-items:center}.category-label{font-size:.875rem}.form-heading>span{font-size:.8rem}.header-inner nav a{font-size:.875rem}.related .tool-card h3{line-height:1.5}}