:root{--bg:#f8f9f6;--paper:#fff;--text:#202e29;--muted:#6d7872;--border:#e6eae4;--green:#176c56;--soft:#edf4ed;--key:#f4f6f2;--shadow:0 18px 50px #243e2d07;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.55 'Segoe UI',Arial,sans-serif}body.dark{--bg:#111b17;--paper:#1b2821;--text:#edf3eb;--muted:#a6b5aa;--border:#334238;--green:#99d6b7;--soft:#293d2e;--key:#26352c;--shadow:none;color-scheme:dark}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer;color:inherit}a{color:inherit;text-decoration:none}button{border:0;background:none}button:hover{filter:brightness(.94)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #70ae8e;outline-offset:3px}header{height:100px;max-width:1240px;padding:0 36px;margin:auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:11px;font-size:25px;font-weight:650;letter-spacing:-1px;line-height:1.1}.brand-icon{width:42px;height:44px;border-radius:13px;background:var(--green);color:var(--paper);font:italic 40px Georgia;text-align:center;position:relative}.brand-icon span{font:28px Georgia;position:absolute;right:3px;bottom:0;color:#c4eab6}.brand-sub{display:block;font-size:8px;letter-spacing:2.7px;margin-top:6px;font-weight:600}nav{display:flex;gap:34px;font-size:13px;font-weight:600;color:var(--muted)}nav a:hover{color:var(--green)}.settings{display:flex;gap:10px}.settings button{border:1px solid var(--border);border-radius:50%;height:38px;min-width:38px;background:var(--paper);font-size:12px}main{max-width:1170px;margin:auto;padding:0 24px}.intro{text-align:center;padding:58px 0 40px;position:relative}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--green);display:flex;align-items:center;justify-content:center;gap:8px}.eyebrow>span:first-child{width:6px;height:6px;background:var(--green);border-radius:50%}h1{font-size:clamp(38px,4.2vw,58px);line-height:1.12;font-weight:500;letter-spacing:-2.3px;margin:21px 0 17px}h1 em{font-family:Georgia,serif;font-weight:400;color:var(--green)}.intro>p{color:var(--muted);font-size:14px}.search{max-width:440px;display:flex;align-items:center;gap:12px;padding:10px 15px;border:1px solid var(--border);border-radius:10px;background:var(--paper);margin:26px auto 0;text-align:left}.search>span{font-size:25px;line-height:1}.search input{border:0;outline:none;background:transparent;color:var(--text);width:100%;font-size:12px}.search kbd{border:1px solid var(--border);border-radius:4px;padding:0 7px;color:var(--muted)}#search-results{max-width:440px;margin:6px auto;background:var(--paper);border:1px solid var(--border);border-radius:10px;text-align:left;padding:8px}#search-results button{display:block;width:100%;text-align:left;padding:10px;border-radius:6px}#search-results button:hover{background:var(--soft)}.workspace{display:grid;grid-template-columns:225px minmax(0,1fr);gap:25px;align-items:start;scroll-margin-top:20px}.sidebar{padding-top:9px}.small-label{font-size:9px;font-weight:700;letter-spacing:1.7px;color:var(--muted)}.sidebar>.small-label{padding:0 14px;margin-bottom:18px}.tool{width:100%;display:flex;align-items:center;gap:12px;border-radius:10px;text-align:left;padding:15px 13px;margin-bottom:7px}.tool.active{background:var(--soft);color:var(--green)}.tool>span{font-size:24px;width:25px}.tool strong{display:block;font-size:13px;font-weight:600}.tool small{font-size:10px;color:var(--muted);display:block;margin-top:3px}.tool b{margin-left:auto;font-size:15px;font-weight:400}.side-note{margin:40px 14px 0;padding-top:24px;border-top:1px solid var(--border)}.side-note>span{display:block;font-size:27px;color:var(--green);margin-bottom:12px}.side-note strong{font-size:13px;font-weight:500;display:block;max-width:150px}.side-note p{font-size:11px;color:var(--muted);max-width:170px}.panel{background:var(--paper);border:1px solid var(--border);border-radius:18px;padding:28px;box-shadow:var(--shadow);min-width:0;scroll-margin-top:20px}.panel-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:25px}h2{font-size:25px;letter-spacing:-.7px;font-weight:550;margin:4px 0 0}.status{font-size:10px;color:var(--green);background:var(--soft);padding:5px 9px;border-radius:20px}.status:before{content:'●';font-size:7px;margin-right:5px}.calc-layout{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:25px}.calc-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px}.segmented{display:flex;background:var(--key);padding:3px;border-radius:7px}.segmented button{font-size:11px;padding:6px 15px;border-radius:5px;color:var(--muted)}.segmented .selected{background:var(--paper);color:var(--text);box-shadow:0 1px 4px #0001}#angle{font-size:11px;color:var(--green);padding:7px;border:1px solid var(--border);border-radius:6px}.display{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:15px 18px;text-align:right;margin-bottom:16px}.display input{width:100%;background:transparent;border:0;color:var(--muted);text-align:right;font-size:16px;min-height:25px}.display output{display:block;font-size:38px;line-height:1.4;letter-spacing:-1px;overflow-wrap:anywhere;min-height:54px}.display output.error{font-size:15px;color:#b74436;padding-top:10px}.keys{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.keys button,.scientific-keys button{border-radius:8px;background:var(--key);min-height:46px;font-size:18px}.keys button.operator{background:var(--soft);color:var(--green)}.keys button.clear{color:#aa5848;font-size:13px}.keys button.equals{background:#176c56;color:#fff}.scientific-keys{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;margin-bottom:10px}.scientific-keys button{font-size:12px;min-height:35px}.keyboard-hint{font-size:9px;text-align:center;color:var(--muted);margin-top:14px}.history{border-left:1px solid var(--border);padding-left:22px;display:flex;flex-direction:column;min-width:0}.history-heading{display:flex;justify-content:space-between;align-items:center}.history h3{font-size:12px;font-weight:600;margin:6px 0 20px}.history-heading button{font-size:10px;color:var(--muted);margin-top:-14px}.empty-history{text-align:center;padding-top:42px;color:var(--muted);font-size:11px}.empty-history span{display:block;font-size:28px;margin-bottom:10px;color:#a7b5aa}.history-note{font-size:9px;color:var(--muted);margin:auto 0 0;padding-top:25px}#history-list{max-height:330px;overflow:auto}.history-entry{width:100%;text-align:right;padding:9px 0;border-bottom:1px solid var(--border);overflow-wrap:anywhere}.history-entry small{display:block;color:var(--muted);font-size:11px}.history-entry strong{font-size:17px;font-weight:500}details{border-top:1px solid var(--border);margin-top:22px;padding-top:14px;font-size:11px;color:var(--muted)}summary{cursor:pointer}details p{max-width:600px}.benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;padding:44px 0 32px;margin-left:250px}.benefits>div{position:relative;padding-left:29px}.benefits span{position:absolute;left:0;font-size:21px;color:var(--green)}.benefits strong{font-size:11px;font-weight:600}.benefits p{font-size:10px;color:var(--muted);margin:5px 0}.future{text-align:center;border:1px dashed var(--border);border-radius:8px;color:var(--muted);font-size:10px;padding:15px;margin:0 0 32px 250px}footer{border-top:1px solid var(--border);display:flex;justify-content:space-between;padding:23px 0;color:var(--muted);font-size:10px}footer button{font-size:10px;color:var(--muted)}.footer-dot{margin:0 9px}.panel-symbol{font-size:34px;color:var(--green)}form label{display:flex;flex-direction:column;gap:7px;font-size:12px;margin-bottom:20px}form input,form select,form textarea{width:100%;border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;padding:12px;min-width:0}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.helper{color:var(--muted);font-size:12px;margin:12px 0 24px}.primary{background:#176c56;color:white;border-radius:8px;padding:12px 24px;font-weight:600;font-size:13px}.form-result{display:block;background:var(--soft);padding:24px;border-radius:10px;margin-top:25px;font-size:28px;overflow-wrap:anywhere}dialog{max-width:500px;width:calc(100% - 32px);border:1px solid var(--border);border-radius:16px;padding:30px;background:var(--paper);color:var(--text)}dialog p{color:var(--muted);font-size:14px}dialog::backdrop{background:#10251cb3}.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;left:15px;top:-100px;background:var(--paper);padding:12px;z-index:10}.skip:focus{top:15px}[hidden]{display:none!important}
@media(min-width:1450px){.intro{padding-top:65px}.panel{padding:32px}.keys button{min-height:50px}}
@media(max-width:1000px){.workspace{grid-template-columns:180px minmax(0,1fr);gap:16px}.calc-layout{grid-template-columns:minmax(0,1fr) 150px;gap:18px}.panel{padding:22px}.history{padding-left:16px}.benefits,.future{margin-left:196px}.benefits{gap:14px}.tool{padding:12px 8px}.tool small{font-size:9px}}
@media(max-width:760px){header{height:78px;padding:0 20px}nav{display:none}main{padding:0 16px}.intro{padding:35px 0 27px}h1{letter-spacing:-1.4px}.eyebrow{font-size:8px;letter-spacing:1.3px}.intro>p{font-size:12px}.workspace{display:block}.sidebar{display:flex;gap:6px;padding:0 0 15px}.sidebar>.small-label,.side-note,.tool small,.tool b{display:none}.tool{justify-content:center;background:var(--paper);border:1px solid var(--border);padding:10px 6px;gap:5px;margin:0}.tool>span{font-size:17px;width:auto}.tool strong{font-size:11px}.calc-layout{grid-template-columns:minmax(0,1fr) 160px}.panel{padding:20px}.panel-heading{margin-bottom:20px}.benefits{margin:0;padding:30px 0;gap:15px}.benefits>div{padding-left:0}.benefits span{position:static;display:block}.benefits strong{font-size:10px}.future{margin:0 0 22px}footer{gap:14px;align-items:start}.footer-dot{display:none}footer>span>span:last-child{display:block;margin-top:5px}.status{font-size:9px}}
@media(max-width:510px){.calc-layout{display:block}.history{border-left:0;border-top:1px solid var(--border);padding:17px 0 0;margin-top:20px}.history h3{margin-bottom:8px}.history-heading button{margin:0}.empty-history{padding:10px 0;font-size:11px}.empty-history span{display:none}.history-note{padding-top:8px;margin:0}.history-entry{padding:8px 0}#history-list{max-height:160px}.panel-heading h2{font-size:23px}.status{max-width:120px}.form-grid{grid-template-columns:1fr;gap:0}.keys button{min-height:49px}.display output{font-size:35px}.benefits{gap:12px}.benefits p{font-size:9px}.keyboard-hint{font-size:8px}.settings{gap:6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Clock calculator and clear operator symbols */
.keys button.operator,.keys button.equals{font-size:24px;display:flex;align-items:center;justify-content:center}.keys svg{display:block;flex-shrink:0}.time-tabs{margin:0 0 22px;width:fit-content;max-width:100%}.time-tabs button{min-height:42px;font-size:12px;padding:9px 18px}.clock-result{background:var(--soft);padding:25px;border-radius:12px;margin-top:25px}.clock-result output{display:block;color:var(--green);font-size:48px;line-height:1.3;font-weight:600;letter-spacing:-1px;overflow-wrap:anywhere}.clock-result p{margin:6px 0 0;font-size:14px}.clock-result p:last-child{font-size:12px;color:var(--muted)}.intro{padding-top:30px;padding-bottom:26px}h1{font-size:clamp(34px,3.5vw,46px);margin:16px 0 12px}.intro .search{margin-top:18px}@media(max-width:510px){.time-tabs{width:100%}.time-tabs button{flex:1;padding:8px;font-size:11px}.keys button.operator,.keys button.equals{font-size:22px}.clock-result{padding:18px}.clock-result output{font-size:42px}.intro{padding-top:24px}}
/* Match the division icon's visible size to the typographic operators. */
.keys button.operator svg{width:18px;height:18px}

.keys button svg.math-symbol{width:20px;height:20px;display:block;margin:auto;flex-shrink:0}


.keys button.clear{font-size:16px;font-weight:600;letter-spacing:.2px;color:#aa5848}body.dark .keys button.clear{color:#f3a99b}