:root{color-scheme:light;--bg:#f5f6f3;--surface:#fff;--soft:#f0f2ee;--inset:#f7f8f5;--text:#1c2925;--muted:#66736c;--line:#dfe5df;--accent:#176b50;--accent-hover:#10563f;--accent-soft:#e9f3ed;--accent-text:#12513d;--danger:#ac3035;--shadow:0 3px 16px #1a302408;--focus:#219b76;--radius:18px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"Noto Sans",sans-serif;font-synthesis:none}
:root[data-theme=dark]{color-scheme:dark;--bg:#111815;--surface:#1a231e;--soft:#253029;--inset:#151e19;--text:#ecf1eb;--muted:#a2b1a6;--line:#344239;--accent:#91d9b6;--accent-hover:#ace6c9;--accent-soft:#233e30;--accent-text:#b7ecd0;--danger:#ffabab;--shadow:0 3px 16px #0002;--focus:#91d9b6}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--bg);color:var(--text);font-size:14px;line-height:1.55;min-width:280px}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{color:inherit;cursor:pointer}button,select,input{border-radius:9px}button{touch-action:manipulation}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button:disabled{cursor:default;opacity:.45}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:3px}button{border:1px solid transparent;background:transparent}svg{width:18px;height:18px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle}.icon-defs{position:absolute;width:0;height:0;overflow:hidden}[hidden]{display:none!important}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip{position:fixed;inset-block-start:-80px;inset-inline-start:12px;padding:10px 15px;background:var(--surface);z-index:100}.skip:focus{inset-block-start:8px}.wrap{width:min(1120px,calc(100% - 48px));margin-inline:auto}.site-header{border-bottom:1px solid var(--line);background:var(--surface)}.header-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:14px}.brand{display:inline-flex;align-items:center;gap:10px;min-width:0;font-weight:650;font-size:17px;letter-spacing:-.35px}.brand-mark{width:32px;height:36px;border-radius:9px;background:var(--accent);color:var(--surface);display:grid;place-items:center}.brand-mark svg{width:22px;height:22px;stroke-width:1.8}.brand-separator{color:var(--line);font-weight:400;margin-inline:1px}.brand-name{font-size:14px;font-weight:500;letter-spacing:0}.header-links{display:flex;gap:22px;align-items:center}.parent-link{display:flex;align-items:center;gap:5px;font-size:12px;font-weight:550;white-space:nowrap}.parent-link svg{width:13px;height:13px}.language-menu{position:relative;font-size:12px}.language-menu summary{list-style:none;display:flex;gap:7px;align-items:center;cursor:pointer;border:1px solid var(--line);padding:7px 10px;border-radius:8px;min-height:36px;white-space:nowrap}.language-menu summary::-webkit-details-marker{display:none}.language-menu summary .chevron{width:12px;height:12px}.language-list{position:absolute;inset-inline-end:0;top:calc(100% + 8px);width:280px;max-height:65vh;overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:7px;box-shadow:0 12px 40px #0002;display:grid;grid-template-columns:1fr 1fr;gap:2px;z-index:20}.language-list a{padding:9px 10px;border-radius:7px}.language-list a:hover,.language-list a[aria-current=page]{background:var(--accent-soft);color:var(--accent-text)}.intro{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-block:29px 24px}.eyebrow{display:flex;align-items:center;gap:6px;font-size:10px;letter-spacing:1.6px;font-weight:650;color:var(--accent);text-transform:uppercase;margin:0 0 7px}.eyebrow span{width:5px;height:5px;border-radius:50%;background:currentColor}h1{font-size:clamp(23px,2.65vw,32px);letter-spacing:-1px;line-height:1.25;margin:0;font-weight:650;text-wrap:balance}.intro p{margin:7px 0 0;color:var(--muted);font-size:13px}.toolbar{display:flex;align-items:center;gap:8px;flex-shrink:0}.icon-button{min-width:36px;min-height:36px;display:inline-grid;place-items:center;padding:7px;border:1px solid var(--line);background:var(--surface);border-radius:9px}.icon-button:hover{background:var(--soft)}.text-button{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--line);background:var(--surface);padding:8px 12px;font-size:12px;font-weight:550;min-height:36px}.text-button:hover{background:var(--soft)}.theme-dark-icon{display:none}[data-theme=dark] .theme-dark-icon{display:block}[data-theme=dark] .theme-light-icon{display:none}.mobile-nav{display:none}.workspace{display:grid;grid-template-columns:minmax(0,.87fr) minmax(0,1.13fr);gap:18px;align-items:start}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);min-width:0;overflow:hidden;scroll-margin-top:18px}.card-header{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:18px 20px 14px}.section-title{display:flex;align-items:center;gap:9px;min-width:0}h2{margin:0;font-size:15px;font-weight:650;letter-spacing:-.2px}.section-index{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px;color:var(--muted);padding:2px 5px;border:1px solid var(--line);border-radius:4px;letter-spacing:0}.segmented{display:flex;background:var(--soft);border-radius:8px;padding:3px;gap:2px}.segmented button{padding:5px 10px;border-radius:6px;font-size:11px;font-weight:550;white-space:nowrap;line-height:1.5}.segmented button[aria-pressed=true]{background:var(--surface);box-shadow:0 1px 5px #0000000e;color:var(--accent)}.calc-inner{padding:0 20px 16px}.calc-display{background:var(--inset);border:1px solid var(--line);border-radius:12px;padding:11px 14px 12px}.display-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:6px;color:var(--muted);font-size:10px}.display-actions{display:flex;gap:3px}.display-actions button{padding:4px;min-width:28px;min-height:28px;border-radius:5px}.display-actions button:hover{background:var(--line)}.display-actions svg{width:15px;height:15px}.expression{display:block;width:100%;border:0;padding:3px 0;background:transparent;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:17px;line-height:1.5;text-align:end;direction:ltr;outline-offset:1px!important;border-radius:2px}.result-line{display:flex;direction:ltr;gap:6px;align-items:baseline;justify-content:flex-end;min-height:53px;margin-top:6px;min-width:0}.result-sign{font-size:19px;color:var(--muted);font-weight:400}.calc-result{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:40px;line-height:1.25;font-weight:450;letter-spacing:-1.5px;overflow-wrap:anywhere;text-align:right;min-width:0}.calc-result[data-long=true]{font-size:25px;letter-spacing:-.7px}.calc-error{font-size:11px;color:var(--danger);margin:4px 0 0;line-height:1.5;min-height:0}.calc-error:empty{display:none}.sci-toolbar{display:flex;align-items:center;justify-content:space-between;margin-top:12px;gap:8px}.memory-keys{display:flex;gap:2px;direction:ltr}.memory-keys button{padding:5px 6px;font-size:10px;font-family:ui-monospace,monospace;border-radius:5px}.memory-keys button:hover{background:var(--soft)}.angle-keys button{font-size:10px;padding:4px 6px}.scientific-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:5px;margin-top:9px;direction:ltr}.scientific-grid button{height:34px;font-size:12px;background:var(--soft);border-color:transparent}.scientific-grid button:hover{background:var(--line)}.keypad{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin-top:12px;direction:ltr}.key{height:49px;border:1px solid var(--line);background:var(--surface);border-radius:9px;font-size:21px;font-weight:450;line-height:1;transition:background .12s,transform .08s}.key:hover{background:var(--soft)}.key:active,.scientific-grid button:active{transform:translateY(1px)}.key.utility{background:var(--soft);border-color:var(--soft);font-size:16px;color:var(--muted)}.key.operator{background:var(--accent-soft);border-color:var(--accent-soft);color:var(--accent-text);font-size:24px}.key.equals{background:var(--accent);border-color:var(--accent);color:var(--surface);font-size:26px}.key.equals:hover{background:var(--accent-hover)}.calc-bottom{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:12px;font-size:10px;color:var(--muted)}.calc-bottom button{display:flex;align-items:center;gap:5px;font-size:11px;padding:4px 0;white-space:nowrap}.calc-bottom button:hover{color:var(--accent)}.calc-bottom svg{width:14px;height:14px}.category-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:6px;padding:0 20px 16px}.category-grid button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:9px 3px 8px;min-height:57px;background:var(--inset);border-color:transparent;border-radius:9px;font-size:10px;line-height:1.3;min-width:0;overflow-wrap:anywhere}.category-grid button svg{width:17px;height:17px;color:var(--muted)}.category-grid button:hover{background:var(--soft)}.category-grid button[aria-pressed=true]{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-text)}.category-grid button[aria-pressed=true] svg{color:var(--accent-text)}.converter-body{border-top:1px solid var(--line);padding:17px 20px 18px}.converter-heading{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:11px}.converter-heading h3{font-size:13px;font-weight:650;margin:0}.converter-heading button{font-size:10px;color:var(--muted);display:flex;gap:4px;align-items:center;padding:3px 0}.converter-heading svg{width:12px;height:12px}.conversion-fields{display:grid;grid-template-columns:minmax(0,1fr) 30px minmax(0,1fr);gap:8px;align-items:center}.field-label{display:block;color:var(--muted);font-size:10px;margin-bottom:5px}.unit-field{min-width:0}.unit-field select{width:100%;border:1px solid var(--line);background:var(--surface);color:var(--text);height:40px;padding:7px 8px;font-size:11px;text-overflow:ellipsis;cursor:pointer}.swap-button{border:1px solid var(--line);border-radius:50%;height:30px;min-width:30px;margin-top:19px;padding:5px;display:grid;place-items:center;color:var(--muted)}.swap-button:hover{color:var(--accent);background:var(--accent-soft)}.swap-button svg{width:16px;height:16px}.value-wrap{margin-top:14px;position:relative}.value-input{width:100%;background:var(--inset);border:1px solid var(--line);color:var(--text);padding:11px 12px;font:23px/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;direction:ltr;min-width:0}.value-label-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.input-count{font-size:9px;color:var(--muted);direction:ltr;font-family:ui-monospace,monospace}.converter-result-box{margin-top:12px;background:var(--accent-soft);border:1px solid var(--accent-soft);border-radius:11px;padding:12px 13px 11px;color:var(--accent-text);position:relative}.converter-result-top{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:10px;margin-bottom:4px;min-height:24px}.converter-result-top button{width:26px;height:26px;display:grid;place-items:center;padding:3px;border-radius:5px;color:var(--accent-text)}.converter-result-top button:hover{background:var(--line)}.converter-result-top svg{width:15px;height:15px}.converted-number{font:30px/1.25 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:-.9px;overflow-wrap:anywhere;display:block;direction:ltr;text-align:start}.converted-number[data-long=true]{font-size:25px}.converted-unit{font-size:11px;margin-top:5px}.equivalence{color:var(--muted);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px;margin:10px 0 0;direction:ltr;overflow-wrap:anywhere}.unit-hint{color:var(--muted);font-size:10px;margin:9px 0 0;line-height:1.6}.converter-error{color:var(--danger);font-size:11px;margin:8px 0 0}.converter-error:empty{display:none}.related-heading{font-size:11px;font-weight:550;margin:15px 0 8px}.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px 12px}.related-item{display:flex;justify-content:space-between;gap:8px;min-width:0;align-items:center;padding:6px 0;border-bottom:1px solid var(--line);font-size:10px}.related-item .related-label{color:var(--muted);white-space:nowrap}.related-item output{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;direction:ltr;text-align:right;overflow-wrap:anywhere}.info-strip{display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:10px;padding-block:15px 19px}.info-status{display:flex;align-items:center;gap:5px;flex-shrink:0}.info-status svg{width:13px;height:13px;color:var(--accent)}.precision-note{margin:0}.help{border-top:1px solid var(--line);padding-top:16px;margin-bottom:27px;display:grid;grid-template-columns:170px minmax(0,1fr);gap:28px}.help h2{font-size:13px;padding-top:7px}.faq details{border-bottom:1px solid var(--line)}.faq details:last-child{border-bottom:0}.faq summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:12px;font-weight:550;padding-block:9px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';font-size:19px;font-weight:400;color:var(--muted)}.faq details[open] summary:after{content:'−'}.faq p{font-size:12px;line-height:1.85;color:var(--muted);margin:0 20px 12px 0;overflow-wrap:anywhere}.site-footer{border-top:1px solid var(--line);padding:18px 0;color:var(--muted);font-size:11px}.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:20px}.footer-inner .footer-symbol{font-family:ui-monospace,monospace;letter-spacing:5px;color:var(--muted);opacity:.6}dialog{width:min(470px,calc(100% - 32px));max-height:80dvh;overflow:auto;border:1px solid var(--line);border-radius:16px;background:var(--surface);color:var(--text);padding:22px;box-shadow:0 20px 80px #0004}dialog::backdrop{background:#0c201980;backdrop-filter:blur(3px)}.dialog-header{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:13px}dialog h2{font-size:17px}dialog p{font-size:13px;color:var(--muted);line-height:1.85}.history-list{list-style:none;padding:0;margin:0 0 12px}.history-list li{border-bottom:1px solid var(--line)}.history-list button{display:block;width:100%;padding:11px 6px;text-align:end;direction:ltr;overflow-wrap:anywhere;font-family:ui-monospace,monospace;border-radius:4px}.history-list button:hover{background:var(--soft)}.history-expression{display:block;color:var(--muted);font-size:11px}.history-value{font-size:18px}.dialog-bottom{display:flex;justify-content:flex-end}.toast{position:fixed;bottom:24px;inset-inline-start:50%;transform:translateX(-50%);background:var(--text);color:var(--surface);padding:10px 17px;border-radius:10px;box-shadow:0 4px 20px #0003;font-size:12px;z-index:60;width:max-content;max-width:calc(100% - 32px);text-align:center}[dir=rtl] .toast{transform:translateX(50%)}.update-banner{position:fixed;inset-inline:16px;bottom:16px;margin:auto;width:fit-content;max-width:calc(100% - 32px);z-index:55;display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--accent);border-radius:12px;padding:11px 14px;box-shadow:var(--shadow);font-size:12px}.update-banner .reload{color:var(--accent);font-weight:650;text-decoration:underline}.update-banner svg{width:14px;height:14px}.noscript{display:block;background:var(--accent-soft);padding:14px;color:var(--accent-text)}.error-page{max-width:640px;padding-block:80px}.error-page h1{margin-bottom:16px}.error-page a{color:var(--accent);text-decoration:underline}.lang-directory{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}sup{font-size:.7em}
@media(min-width:1500px){.wrap{width:1120px}.intro{padding-top:36px}}
@media(max-width:900px){.wrap{width:calc(100% - 32px)}.workspace{grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:14px}.card-header{padding:16px 15px 12px}.calc-inner{padding:0 15px 14px}.category-grid{padding:0 15px 14px;grid-template-columns:repeat(4,minmax(0,1fr))}.converter-body{padding:15px}.calc-result{font-size:35px}.calc-result[data-long=true]{font-size:22px}.key{height:46px}.converted-number{font-size:26px}.converted-number[data-long=true]{font-size:22px}.conversion-fields{gap:5px;grid-template-columns:minmax(0,1fr) 28px minmax(0,1fr)}.unit-field select{padding-inline:5px}.swap-button{min-width:28px;width:28px;height:28px}.related-grid{gap:5px 9px}.related-item{font-size:9px}.intro{gap:14px}h1{letter-spacing:-.7px}.brand-name{font-size:13px}.header-links{gap:15px}.toolbar .install-label{display:none}.toolbar .text-button{padding:8px}}
@media(max-width:700px){.wrap{width:calc(100% - 28px)}.header-inner{min-height:62px}.brand{gap:8px;font-size:16px}.brand-name{display:none}.brand-separator{display:none}.brand-mark{width:28px;height:31px;border-radius:8px}.brand-mark svg{width:19px;height:19px}.header-links{gap:12px}.parent-link{font-size:11px}.language-menu summary{padding:6px 8px;font-size:11px;max-width:160px}.language-menu summary .native-label{overflow:hidden;text-overflow:ellipsis}.intro{padding-block:23px 17px;align-items:flex-start}.eyebrow{font-size:8px;letter-spacing:1.1px}h1{font-size:25px;letter-spacing:-.7px}.intro p{font-size:12px;margin-top:7px}.toolbar{gap:6px;padding-top:2px}.toolbar .text-button{display:none}.toolbar .icon-button{min-width:34px;min-height:34px}.workspace{grid-template-columns:1fr;gap:16px}.card-header{padding:16px 17px 13px;flex-wrap:nowrap}.calc-inner{padding:0 17px 16px}.category-grid{padding:0 17px 15px;grid-template-columns:repeat(6,minmax(0,1fr));gap:5px}.category-grid button{font-size:9px;min-height:57px}.converter-body{padding:16px 17px}.calc-result{font-size:40px}.calc-result[data-long=true]{font-size:25px}.key{height:49px}.keypad{gap:7px}.scientific-grid button{height:36px}.mobile-nav{display:flex;gap:8px;margin-bottom:13px;align-items:center}.mobile-nav a{font-size:11px;font-weight:550;padding:6px 11px;border:1px solid var(--line);border-radius:7px;display:flex;align-items:center;gap:6px}.mobile-nav svg{width:13px;height:13px}.mobile-nav .mobile-install{margin-inline-start:auto;padding:6px 8px}.converted-number{font-size:31px}.converted-number[data-long=true]{font-size:25px}.related-item{font-size:11px}.help{grid-template-columns:1fr;gap:6px;margin-bottom:22px}.help h2{padding-top:0}.info-strip{align-items:flex-start;gap:12px;font-size:9px;padding-block:13px 16px}.info-status{max-width:37%;white-space:normal;flex-shrink:1}.precision-note{max-width:65%}.footer-inner{font-size:10px}.language-list{width:270px}.calc-bottom{font-size:10px}.unit-field select{font-size:12px;padding-inline:7px}.conversion-fields{grid-template-columns:minmax(0,1fr) 30px minmax(0,1fr);gap:8px}.swap-button{width:30px;height:30px}.toast{bottom:16px}.faq p{margin-inline-end:0}}
@media(max-width:360px){.wrap{width:calc(100% - 20px)}.header-links{gap:8px}.language-menu summary{max-width:135px}.parent-link svg{display:none}.brand-name{display:none}.intro{gap:10px}h1{font-size:23px}.category-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.card-header{flex-wrap:wrap}.calc-result[data-long=true]{font-size:22px}.converted-number[data-long=true]{font-size:22px}.calc-bottom{flex-wrap:wrap}.segmented button{padding-inline:8px}.memory-keys button{padding-inline:4px}.related-grid{grid-template-columns:1fr}.mobile-nav a{padding-inline:8px;font-size:10px}.brand{font-size:15px}.brand-mark{width:26px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
@media print{.header-links,.toolbar,.mobile-nav,.keypad,.scientific-grid,.sci-toolbar,.calc-bottom,.help,.site-footer,.icon-button,.display-actions,.converter-heading button,.category-grid,.swap-button,.update-banner{display:none!important}body{background:white;color:black}.wrap{width:100%}.workspace{display:block}.card{margin-bottom:15px;box-shadow:none;break-inside:avoid}.intro{padding-block:10px}.converter-result-box{background:#f4f4f4}.info-strip{display:block}.calc-display{background:white}}

.calc-result[data-very-long=true],.converted-number[data-very-long=true]{font-size:20px;letter-spacing:-.5px}
@media(max-width:360px){.calc-result[data-very-long=true],.converted-number[data-very-long=true]{font-size:18px}}
/* Keep the requested brand-left / navigation-right header in every language. */
.header-inner{direction:ltr}.brand-name{unicode-bidi:plaintext}