:root{--bg:#f7f7f4;--surface:#fff;--text:#171714;--muted:#66665f;--line:#dfdfd8;--soft:#eeeeea;--accent:#20201d;--radius:18px;--shadow:0 18px 60px rgba(20,20,16,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:12px;top:12px;z-index:10;background:#fff;padding:10px 14px;border-radius:8px}.site-header{min-height:72px;max-width:1120px;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-weight:900;font-size:20px;letter-spacing:-.03em;color:var(--text);text-decoration:none}.site-header nav,.site-footer nav{display:flex;gap:20px;flex-wrap:wrap}.site-header nav a,.site-footer a{color:var(--muted);text-decoration:none;font-size:14px}.site-header nav a:hover,.site-footer a:hover{text-decoration:underline}.home-hero{max-width:900px;margin:92px auto 75px;padding:0 24px;text-align:center}.eyebrow{margin:0;color:#77776f;font-size:11px;font-weight:850;letter-spacing:.16em}.home-hero h1,.page-intro h1,.tool-intro h1,.not-found h1,.legal-page h1{margin:14px 0;line-height:1.02;letter-spacing:-.055em;font-size:clamp(42px,7vw,76px)}.home-hero>p:not(.eyebrow),.page-intro>p:not(.eyebrow),.tool-intro>p:not(.eyebrow){max-width:690px;margin:20px auto 30px;color:var(--muted);font-size:19px}.search-box{display:block;max-width:620px;margin:32px auto 0}.search-box input{width:100%;padding:17px 20px;border:1px solid var(--line);border-radius:14px;background:var(--surface);font:inherit;font-size:17px;box-shadow:0 10px 35px rgba(20,20,16,.04)}.search-box input:focus,input:focus,textarea:focus,select:focus,button:focus-visible,summary:focus-visible{outline:3px solid rgba(23,23,20,.16);outline-offset:2px}.is-searching .home-hero{margin-bottom:18px}.page-section,.content-shell,.tool-shell{max-width:1120px;margin:auto;padding:0 24px 78px}.content-shell,.tool-shell{padding-top:36px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.section-heading h2{margin:6px 0 0;font-size:30px;letter-spacing:-.035em}.section-heading>span{color:var(--muted);font-size:14px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:13px}.tool-card{display:flex;gap:15px;padding:19px;background:var(--surface);border:1px solid var(--line);border-radius:15px;color:inherit;text-decoration:none;transition:transform .15s,box-shadow .15s}.tool-card:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(20,20,16,.06)}.tool-card strong{display:block;margin-bottom:3px;font-size:16px}.tool-card small{display:block;color:var(--muted);line-height:1.45}.tool-icon{width:46px;height:46px;display:grid;place-items:center;flex:none;border-radius:12px;background:var(--soft);font-size:13px;font-weight:900}.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.category-grid a{padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);color:inherit;text-decoration:none}.category-grid strong{display:block;font-size:20px}.category-grid span{display:block;color:var(--muted);margin-top:4px;min-height:46px}.category-grid small{display:block;margin-top:14px;color:#83837c}.empty-state{text-align:center;color:var(--muted);padding:30px}.breadcrumbs{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:45px;color:#81817a;font-size:13px}.breadcrumbs a{color:inherit}.page-intro,.tool-intro{text-align:left;max-width:850px;margin-bottom:34px}.page-intro>p:not(.eyebrow),.tool-intro>p:not(.eyebrow){margin-left:0}.tool-panel{max-width:850px;padding:30px;margin:32px 0 34px;background:var(--surface);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.tabs{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:28px}.tab,.button-row button,.primary-button,.generated-value button{border:0;border-radius:10px;background:var(--soft);padding:11px 15px;color:var(--text);font:inherit;font-weight:750;cursor:pointer}.tab.is-active,.button-row button:not(.secondary),.primary-button{background:var(--accent);color:#fff}.inline-fields,.field-grid{display:flex;align-items:end;gap:14px}.field-grid{display:grid;grid-template-columns:1fr 1fr}.field-grid-three{grid-template-columns:repeat(3,1fr)}.inline-fields label,.field-grid label,.stacked-field,.converter-grid label{display:flex;flex-direction:column;gap:7px;flex:1}.inline-fields label>span,.field-grid label>span,.stacked-field>span,.converter-grid label>span{font-size:13px;font-weight:750;color:var(--muted)}input,textarea,select{width:100%;border:1px solid #cfcfc7;border-radius:11px;background:#fff;padding:13px 14px;color:var(--text);font:inherit;font-size:17px}textarea{resize:vertical}.operator{padding-bottom:13px;font-weight:750}.input-suffix{display:flex;align-items:center;border:1px solid #cfcfc7;border-radius:11px;overflow:hidden}.input-suffix input{border:0;border-radius:0}.input-suffix span{padding:0 14px;color:var(--muted)}.result-box{margin-top:28px;padding:22px;border-radius:14px;background:var(--soft)}.result-box>span,.metric-grid span{display:block;color:var(--muted);font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.result-box output{display:block;margin:1px 0;font-size:42px;font-weight:900;letter-spacing:-.04em;overflow-wrap:anywhere}.result-box small{color:var(--muted)}.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:22px}.metric-grid-wide{grid-template-columns:repeat(3,1fr)}.metric-grid-four{grid-template-columns:repeat(4,1fr)}.metric-grid>div{padding:17px;background:var(--soft);border-radius:12px}.metric-grid output{display:block;font-size:26px;font-weight:850;overflow-wrap:anywhere}.button-row{display:flex;flex-wrap:wrap;gap:9px;margin-top:15px}.button-row .secondary,.generated-value .secondary{border:1px solid var(--line);background:#fff;color:var(--text)}.status{min-height:24px;margin-bottom:0;color:var(--muted);font-size:14px}.panel-note{margin:14px 0 0;color:var(--muted);font-size:13px}.check-row{display:flex!important;flex-direction:row!important;align-items:center;gap:9px;color:var(--muted);font-size:14px}.check-row input{width:auto}.option-row,.option-grid{display:flex;gap:18px;flex-wrap:wrap;margin-top:14px}.option-grid{margin:0}.converter-grid{display:grid;grid-template-columns:1fr 1fr auto 1fr;align-items:end;gap:12px}.swap-button{width:48px;height:48px;border:1px solid var(--line);border-radius:11px;background:var(--soft);font-size:20px;cursor:pointer}.fraction-expression{display:flex;align-items:center;justify-content:center;gap:18px}.fraction-expression>select{width:72px}.fraction-input{display:grid;grid-template-rows:1fr 1px 1fr;gap:7px;width:130px}.fraction-input span{background:var(--text)}.fraction-input input{text-align:center}.split-editors{display:grid;grid-template-columns:1fr 1fr;gap:14px}.range-row{display:grid;grid-template-columns:1fr 48px;gap:12px;align-items:center}.range-row input{padding:0}.range-row output{text-align:center;font-weight:800}.generated-value{display:flex;align-items:center;gap:10px;padding:14px 14px 14px 18px;border:1px solid var(--line);background:var(--soft);border-radius:13px}.generated-value output{flex:1;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:17px;overflow-wrap:anywhere}.tool-support{max-width:850px}.help-panel,.faq-item{border:1px solid var(--line);border-radius:13px;background:var(--surface)}.help-panel{margin-bottom:30px}.help-panel summary,.faq-item summary{padding:16px 18px;cursor:pointer;font-weight:800;list-style-position:inside}.help-panel>div,.faq-item p{padding:0 18px 17px;margin:0;color:#51514b}.example-line{margin-top:8px!important}.faq-list,.related-section{margin-top:34px}.faq-list h2,.related-section h2{font-size:23px;letter-spacing:-.025em}.faq-item+.faq-item{margin-top:8px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.legal-page{max-width:850px}.legal-page h1{font-size:52px}.not-found{max-width:800px;margin:110px auto;padding:0 24px;text-align:center}.not-found p{color:var(--muted)}.primary-button{display:inline-block;text-decoration:none;margin-top:15px}.site-footer{max-width:1120px;margin:20px auto 0;padding:35px 24px 48px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr auto;gap:20px;align-items:start;color:var(--muted)}.site-footer p{margin:4px 0}.site-footer small{grid-column:1/-1}.footer-brand{color:var(--text)!important}.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}[hidden]{display:none!important}@media(max-width:850px){.category-grid{grid-template-columns:repeat(2,1fr)}.site-header nav a:nth-last-child(-n+2){display:none}.related-grid{grid-template-columns:repeat(2,1fr)}.converter-grid{grid-template-columns:1fr 1fr}.swap-button{grid-column:1/-1;justify-self:center;transform:rotate(90deg)}.field-grid-three{grid-template-columns:1fr 1fr}.metric-grid-four{grid-template-columns:repeat(2,1fr)}}@media(max-width:720px){.home-hero{margin-top:55px}.site-header nav{gap:12px}.site-header nav a{font-size:13px}.category-grid,.field-grid,.related-grid,.split-editors{grid-template-columns:1fr}.inline-fields{align-items:stretch;flex-direction:column}.operator{padding:0}.metric-grid,.metric-grid-wide,.metric-grid-four{grid-template-columns:repeat(2,1fr)}.tool-panel{padding:21px}.fraction-expression{gap:10px}.fraction-input{width:105px}.site-footer{grid-template-columns:1fr}.site-footer small{grid-column:1}.field-grid-three{grid-template-columns:1fr}}@media(max-width:480px){.category-grid,.metric-grid,.metric-grid-wide,.metric-grid-four{grid-template-columns:1fr}.home-hero h1,.page-intro h1,.tool-intro h1{font-size:44px}.site-header{padding:0 17px}.site-header nav a:nth-child(n+3){display:none}.fraction-expression{flex-direction:column}.fraction-expression>select{width:100%}.fraction-input{width:100%}.generated-value{align-items:stretch;flex-direction:column}}
.input-suffix select{width:auto;border:0;border-left:1px solid var(--line);border-radius:0;background:var(--soft);font-size:14px;padding-left:12px;padding-right:12px}.option-row>label:not(.check-row){display:flex;flex-direction:column;gap:7px;min-width:180px}.option-row>label:not(.check-row)>span{font-size:13px;font-weight:750;color:var(--muted)}[data-tool="unix-timestamp"] .metric-grid output{font-size:17px;line-height:1.35}
.stacked-config{display:grid;gap:14px}.stacked-config>label:not(.stacked-field){display:flex;flex-direction:column;gap:7px}.stacked-config>label:not(.stacked-field)>span{font-size:13px;font-weight:750;color:var(--muted)}.stacked-config+.metric-grid,.stacked-config~.stacked-field{margin-top:18px}.tool-panel textarea[readonly]{background:#fafaf8}
.tool-trust-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:-12px}.tool-trust-row span{padding:5px 9px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);font-size:12px;font-weight:750}.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:8px}.method-grid article{padding:21px;background:var(--surface);border:1px solid var(--line);border-radius:15px}.method-grid h2{margin:6px 0 8px;font-size:19px;letter-spacing:-.02em}.method-grid p:last-child{margin:0;color:#51514b}.trust-note{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:start;margin-top:12px;padding:15px 17px;border:1px solid var(--line);border-radius:13px;background:var(--soft);font-size:13px}.trust-note span{color:var(--muted)}.compact-heading{align-items:end;margin-bottom:14px}.compact-heading h2{font-size:23px}.category-link{color:var(--muted);font-size:13px;text-decoration:none}.category-link:hover{text-decoration:underline}.principle-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.principle-grid article{padding:22px;background:var(--surface);border:1px solid var(--line);border-radius:15px}.principle-grid strong{font-size:18px}.principle-grid p{margin:6px 0 0;color:var(--muted);font-size:14px}.option-spacer{margin-top:16px}.section-spacer{margin-top:24px}input:disabled{background:var(--soft);color:#77776f;cursor:not-allowed}.tool-panel select:disabled{background:var(--soft)}
@media(max-width:720px){.method-grid,.principle-grid{grid-template-columns:1fr}.trust-note{grid-template-columns:1fr}.compact-heading{align-items:start}.category-link{margin-top:4px}}

.tool-trust-row time{padding:5px 9px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--muted);font-size:12px;font-weight:750}.caution-note{margin:12px 0 0;padding:13px 16px;border-left:3px solid #b9b9b1;background:var(--surface);color:var(--muted);font-size:13px}.caution-note strong{color:var(--text)}
.category-guide{max-width:850px;margin:-8px 0 28px;padding:17px 20px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}.category-guide ul{display:flex;gap:8px 24px;flex-wrap:wrap;margin:9px 0 0;padding-left:20px;color:var(--muted);font-size:14px}.formula-note{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:12px;padding:13px 16px;border:1px solid var(--line);border-radius:13px;background:var(--surface);font-size:13px}.formula-note strong{white-space:nowrap}.formula-note code{color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;text-align:right;overflow-wrap:anywhere}.quality-link{margin:14px 0 0;text-align:right}.quality-link a{color:var(--muted);font-size:13px}.trust-page{max-width:850px}.trust-page .lead{font-size:19px;color:var(--muted);max-width:760px}.trust-page section{margin-top:30px}.trust-page h2,.legal-page h2{margin:0 0 8px;font-size:24px;letter-spacing:-.025em}.trust-page section p,.legal-page h2+p{color:#51514b}.page-updated{margin-top:34px;color:var(--muted);font-size:13px}@media(max-width:720px){.formula-note{align-items:flex-start;flex-direction:column}.formula-note code{text-align:left}.quality-link{text-align:left}.category-guide ul{display:grid;gap:5px}}