:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#173b39;background:#f7f8f3;font-synthesis:none;--green:#135e50;--line:#dce3d9}*{box-sizing:border-box}body{margin:0}a{color:inherit}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #d28a28;outline-offset:4px}.skip{position:absolute;top:-80px;background:white;padding:12px}.skip:focus{top:0}header{max-width:1200px;margin:auto;padding:26px 32px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{font-size:19px;font-weight:800;text-decoration:none;display:flex;gap:11px;align-items:center}.mark{background:var(--green);color:#e6f4bb;display:grid;place-items:center;width:36px;height:36px;border-radius:12px;font-size:24px}nav{display:flex;gap:24px;font-size:14px}nav a{text-decoration:none}main{max-width:1200px;margin:auto;padding:55px 32px 80px}.eyebrow{text-transform:uppercase;font-weight:700;font-size:12px;letter-spacing:2px;color:#50705e}.hero{display:grid;grid-template-columns:1.3fr 1fr;align-items:center;gap:70px;margin:12px 0 58px}h1{font-size:clamp(38px,5vw,66px);line-height:1.07;letter-spacing:-2.8px;font-weight:650;margin:18px 0 24px}h1 em{font-style:normal;color:#26735d}p{line-height:1.7;color:#58706b}.intro{font-size:18px;max-width:570px}.hero-art{background:#e8eddd;border-radius:28px;padding:38px;transform:rotate(2deg)}.sample{background:#fff;padding:28px;border-radius:18px;box-shadow:0 16px 30px #23462b10}.sample small{color:#6a7b70}.sample strong{font-size:46px;font-weight:600;display:block;margin:14px 0;color:#205e4a}.sample span{font-size:14px}.pills{display:flex;gap:9px;flex-wrap:wrap;margin-top:24px}.pill{border:1px solid #d6dfcf;border-radius:30px;padding:7px 12px;font-size:12px;color:#426b50}.section-title{font-size:28px;letter-spacing:-.8px;margin:0}.toolbar{display:flex;justify-content:space-between;gap:24px;align-items:center;margin:22px 0}.search{min-width:280px}.filters{display:flex;gap:8px;flex-wrap:wrap}.filters button{border:1px solid var(--line);border-radius:30px;background:transparent;padding:10px 17px;color:#375b4c}.filters button[aria-pressed=true]{color:white;background:var(--green);border-color:var(--green)}input,select{width:100%;border:1px solid #c5d1c5;border-radius:10px;padding:14px;background:#fff;color:#173b39;min-height:49px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.card{background:#fff;border:1px solid var(--line);border-radius:17px;padding:25px;text-decoration:none;transition:transform .15s,border-color .15s;position:relative}.card:hover{transform:translateY(-3px);border-color:#50866e}.icon{display:grid;place-items:center;background:#eff3e9;width:44px;height:44px;border-radius:12px;font-size:25px;color:#317659}.card h3{font-size:18px;margin:20px 0 9px;letter-spacing:-.4px}.card p{font-size:14px;margin:0;padding-right:8px}.arrow{position:absolute;right:24px;top:29px;color:#6b8e76}.note-band{margin-top:48px;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(3,1fr);gap:32px;padding-top:26px}.note-band h3{font-size:15px}.note-band p{font-size:13px}.crumb{font-size:13px;color:#567066}.tool-heading{max-width:770px;margin-bottom:32px}.tool-heading h1{font-size:46px;letter-spacing:-1.7px}.tool-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(260px,1fr);gap:28px}.panel{background:white;border:1px solid var(--line);border-radius:20px;padding:30px}label{display:block;font-size:14px;font-weight:650;margin:0 0 9px}.field{margin-bottom:22px}.row{display:grid;grid-template-columns:1fr 1fr;gap:18px}.primary{background:var(--green);color:white;border:0;padding:14px 24px;border-radius:10px;font-weight:650}.secondary{border:1px solid var(--line);background:white;border-radius:9px;padding:10px 15px;color:#275842}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}button:disabled{opacity:.5;cursor:wait}.result{margin-top:28px;padding:25px;background:#edf4df;border-radius:13px;overflow-wrap:anywhere}.result small{color:#486345}.result output{display:block;font-size:32px;letter-spacing:-1px;font-weight:650;margin-top:9px}.error{color:#a12d28;font-size:14px;min-height:20px}.help{font-size:13px}.formula{background:#eff2e9;border-radius:10px;padding:17px;line-height:1.7;font-size:14px}aside h2{font-size:19px}.keypad{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin-bottom:22px}.keypad button{padding:11px 4px;border:1px solid var(--line);background:#f8faf5;border-radius:8px;color:#214f40}.status{font-size:12px;color:#617368}footer{max-width:1200px;margin:auto;border-top:1px solid var(--line);padding:25px 32px;display:flex;justify-content:space-between;font-size:12px;color:#64786b}[hidden]{display:none!important}@media(max-width:850px){.hero{gap:25px}.hero-art{padding:20px}.grid{grid-template-columns:repeat(2,1fr)}.toolbar{align-items:stretch;flex-direction:column}.tool-layout{grid-template-columns:1fr}}@media(max-width:550px){header{padding:20px}nav{gap:13px;font-size:12px}main{padding:30px 20px 50px}.hero{grid-template-columns:1fr;gap:20px;margin-bottom:40px}.hero-art{display:none}h1{letter-spacing:-1.8px}.grid{grid-template-columns:1fr}.card{padding:23px}.note-band{grid-template-columns:1fr;gap:8px}.tool-heading h1{font-size:36px}.panel{padding:22px}.row{grid-template-columns:1fr;gap:0}.search{min-width:0}.result output{font-size:28px}footer{gap:20px;flex-wrap:wrap}.brand{font-size:16px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;transform:none!important}}
.calc-mode{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;gap:12px}.calc-mode>span{font-size:11px;letter-spacing:2px;font-weight:750}.calc-screen{background:#eaf0df;border:1px solid #ccdac2;padding:20px 16px 8px;border-radius:12px}.calc-screen input{background:transparent;border:0;border-bottom:1px solid #b7c6ad;border-radius:0;font-family:ui-monospace,monospace;font-size:24px;text-align:right}.scientific button{min-height:48px;font-size:18px;box-shadow:0 2px 0 #d5ddd0}.scientific button[data-key="sin("],.scientific button[data-key="cos("],.scientific button[data-key="tan("],.scientific button[data-key="ln("],.scientific button[data-key="log("]{font-size:15px;background:#e7ede3}#clear{background:#f4e5d8;color:#85492e}#backspace{background:#e7ede3}
header{flex-wrap:wrap;gap:16px}.language-picker{position:relative;max-width:100%;font-size:14px}.language-picker summary{cursor:pointer;padding:10px;border:1px solid var(--line);border-radius:8px}.language-picker nav{position:absolute;inset-inline-end:0;z-index:10;display:grid;grid-template-columns:1fr 1fr;gap:4px;min-width:270px;max-width:90vw;padding:12px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 24px #173b3920}.language-picker a{padding:8px}.language-picker a[aria-current]{font-weight:700;text-decoration:underline}summary:focus-visible{outline:3px solid #d28a28;outline-offset:3px}[dir=rtl] h1{letter-spacing:normal;line-height:1.4}[dir=rtl] .card,[dir=rtl] .panel{text-align:start}[dir=rtl] input{direction:ltr;text-align:left}.math{unicode-bidi:isolate;overflow-wrap:anywhere}bdi{unicode-bidi:isolate}.field .help{margin-top:6px}select{max-width:100%}.brand{white-space:nowrap}@media(max-width:550px){.language-picker{width:100%}.language-picker nav{inset-inline-start:0;inset-inline-end:auto}.tool-heading h1{overflow-wrap:anywhere}[dir=rtl] .tool-heading h1{font-size:30px}}
/* Compact native language dropdown, independent of tool forms. */
.language-picker{display:flex;align-items:center;gap:8px;max-width:100%;margin:0;font-size:13px}.language-picker label{margin:0}.language-controls{display:flex;align-items:center;gap:6px;min-width:0}.language-picker select{width:160px;max-width:100%;min-height:44px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;color:inherit}.language-picker button{min-height:44px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:inherit;white-space:nowrap}@media(max-width:550px){.language-picker{width:auto;flex-wrap:wrap}.language-controls{max-width:100%}.language-picker select{width:150px}}
/* Header items shrink within their cells; phone layout has two predictable rows. */
header>*{min-width:0}header>.brand{max-width:100%;white-space:normal;overflow-wrap:anywhere}header .mark{flex-shrink:0}.language-picker{min-width:0;gap:6px}.language-picker label{white-space:normal;overflow-wrap:anywhere}.language-controls{flex:1;min-width:0}.language-picker select{width:100%;min-width:0;max-width:180px;box-sizing:border-box}
@media(max-width:600px){header{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;padding:16px}.brand{grid-column:1/-1}header>nav{min-width:0;flex-wrap:wrap;gap:8px 12px;align-content:center}header>nav a{overflow-wrap:anywhere}.language-picker{width:100%;display:block;justify-self:end}.language-picker label{font-size:12px;margin-block-end:4px}.language-controls{width:100%}.language-picker select{width:100%;max-width:100%;min-height:44px;padding:8px 4px}header>noscript{grid-column:1/-1}}
/* Keep navigation and language in separate phone rows, with real tap-sized links. */
@media(max-width:600px){header{grid-template-columns:minmax(0,1fr);gap:10px}header>.brand,header>nav,header>.language-picker{grid-column:1/-1}header>nav{display:flex;flex-wrap:wrap;gap:8px;width:100%}header>nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:8px 12px;border-radius:8px}header>.language-picker{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.25fr);align-items:center;gap:12px;width:100%;justify-self:stretch}.language-picker label{margin:0;font-size:13px}.language-controls{min-width:0}.language-picker select{width:100%;max-width:100%}}
/* Phone language controls form a visibly separated section, not adjacent navigation. */
@media(max-width:600px){header>.language-picker{margin-block-start:18px;padding-block-start:20px;padding-block-end:8px;border-block-start:1px solid var(--line)}header{row-gap:14px}header>nav{padding-block-end:4px}}

/* Native dialog supplies modal focus containment and an inert page behind it. */
/* New utility tools keep long code and output inside their own panels. */
textarea{font:14px/1.6 ui-monospace,monospace;display:block;width:100%;max-width:100%;padding:14px;border:1px solid #c5d1c5;border-radius:10px;resize:vertical;background:white;color:#173b39}textarea:focus-visible{outline:3px solid #d28a28;outline-offset:3px}.extra-output{white-space:pre-wrap;overflow-wrap:anywhere;max-height:440px;overflow:auto;font:14px/1.65 ui-monospace,monospace}.panel{min-width:0}#extra-tree{margin-top:24px;overflow:auto;max-height:500px}#extra-tree details{padding:6px 0 6px 14px;overflow-wrap:anywhere}#extra-tree summary{cursor:pointer;min-height:32px}#extra-preview{overflow-wrap:anywhere;margin-top:24px}#extra-preview pre{white-space:pre-wrap}#extra-preview h1{font-size:28px;letter-spacing:normal}
/* Keep navigation and language separate on small tablets as well as phones. */
@media(min-width:601px) and (max-width:850px){header{display:grid;grid-template-columns:1fr;row-gap:18px}header>nav{min-height:44px}header>nav a{display:inline-flex;align-items:center;min-height:44px;padding:8px 12px}header>.language-picker{width:100%;padding-block-start:20px;border-block-start:1px solid var(--line);justify-content:space-between}.language-controls{flex:0 1 240px}.language-picker select{max-width:none}}
/* Navigation and language share one type scale and tap-target rhythm. */
header>nav,header>nav a,header>.language-picker,header>.language-picker select{font-family:inherit;font-size:14px;font-weight:400;line-height:20px;letter-spacing:normal;color:inherit}
header>nav{gap:8px;align-items:center}header>nav a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 12px;white-space:nowrap}
header>.language-picker{display:flex;align-items:center;gap:0;min-width:0}header>.language-picker label{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
header>.language-picker .language-controls{flex:0 1 180px;width:180px;max-width:100%}header>.language-picker select{height:44px;min-height:44px;width:180px;max-width:100%;padding:8px 12px;border-radius:8px}
@media(max-width:850px){header>.language-picker{justify-content:flex-start;width:100%}.language-picker .language-controls{margin:0}header>nav a{overflow-wrap:normal}}
.extra-card .icon svg{display:block}.extra-card .arrow{right:auto;inset-inline-end:24px;top:29px;font-size:20px;line-height:24px}[dir=rtl] .extra-card .arrow{transform:scaleX(-1)}
#google-preferences{font-size:13px}#google-dialog{margin:auto;width:min(560px,calc(100% - 32px));max-height:85dvh;overflow:auto;padding:24px;border:1px solid var(--line);border-radius:18px;background:#f7f8f3;color:#173b39;box-shadow:0 18px 70px #0004}#google-dialog::backdrop{background:#102b2866}.google-dialog-title{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.google-dialog-title h2{font-size:22px;margin:8px 0 16px}#google-dialog p{font-size:14px;line-height:1.65}#google-dialog button{min-height:44px;padding:10px 14px;background:white;color:inherit;border:1px solid #135e50;border-radius:8px}#google-dialog .actions button{flex:1;min-width:110px;font-weight:600}#google-dialog .actions{position:sticky;bottom:-24px;padding-block:12px;background:#f7f8f3}.google-dialog-title button{min-width:44px;font-size:24px}

/* Compact language selector: native full-name options with a short visible code. */
header>.language-picker{width:72px;flex:0 0 72px;margin:0;padding:0;border:0;justify-self:end}
header>.language-picker .language-controls{position:relative;width:72px;flex:0 0 72px;height:44px;border-radius:8px;background:transparent}
header>.language-picker .language-code{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:44px;font:inherit;color:inherit;pointer-events:none}
header>.language-picker .language-chevron{width:6px;height:6px;border-inline-end:1.5px solid currentColor;border-block-end:1.5px solid currentColor;transform:rotate(45deg);margin-top:-3px}
header>.language-picker select{position:absolute;inset:0;opacity:0;width:72px;height:44px;min-height:44px;cursor:pointer;margin:0;padding:0}
header>.language-picker .language-controls:hover{background:#eff3e9}
header>.language-picker .language-controls:focus-within{outline:3px solid #d28a28;outline-offset:3px}
@media(max-width:850px){header{display:grid;grid-template-columns:minmax(0,1fr) 72px;gap:12px;padding:16px}header>.brand{grid-column:1/-1}header>nav{grid-column:1;grid-row:2;display:flex;flex-wrap:wrap;gap:4px;width:auto;padding:0;min-height:44px}header>nav a{padding:8px}header>.language-picker{grid-column:2;grid-row:2;width:72px;align-self:center;justify-self:end;margin:0;padding:0;border:0}header>noscript{grid-column:1/-1}}

/* Original local editor workspace, shared by the developer tools. */
.developer-layout{display:block}.developer-layout>section{padding:0;overflow:hidden}.developer-layout #extra-form{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
.editor-input,.editor-result{min-width:0}.developer-layout .editor-input,.developer-layout .editor-result{padding:24px}.developer-layout .editor-result{border-inline-start:1px solid #d8dfd0;background:#f6f8f0}.developer-layout textarea{min-height:300px;font-family:ui-monospace,Consolas,monospace;line-height:1.6;resize:vertical}.developer-layout .extra-output{min-height:300px;max-height:600px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere}.developer-layout>aside{margin-top:24px}.file-import input{width:100%;max-width:100%;font-size:14px}.file-import label{display:block;margin-bottom:8px}#extra-count{font-size:13px;color:#506452}#extra-preview iframe{width:100%;height:300px;border:1px solid #d8dfd0;background:white}#extra-warning{color:#715005}#extra-tree{overflow:auto;max-height:400px;overflow-wrap:anywhere}#extra-tree details{margin-inline-start:12px}#extra-tree summary{padding:6px;cursor:pointer}
@media(max-width:700px){.developer-layout #extra-form{grid-template-columns:minmax(0,1fr)}.developer-layout .editor-input,.developer-layout .editor-result{padding:16px}.developer-layout .editor-result{border-inline-start:0;border-top:1px solid #d8dfd0}.developer-layout textarea,.developer-layout .extra-output{min-height:220px}}