:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;--page:#ebe9e2;--surface:#f5f3ed;--text:#282b26;--muted:#75786e;--line:#d9d9d0;--key:#fdfcf8;--utility:#e7e7df;--operator:#eee4d8;--accent:#ba4c27;--enter:#bd4d28;--enter-text:#fffaf4;--mono:"SFMono-Regular", Consolas, "Liberation Mono", monospace;background:var(--page);color:var(--text);font-synthesis:none;-webkit-font-smoothing:antialiased;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--page:#181a17;--surface:#20221f;--text:#efeee5;--muted:#a2a69a;--line:#393d34;--key:#2c2f29;--utility:#363a32;--operator:#393128;--accent:#f2a07a;--enter:#e59a70;--enter-text:#261e17}}*{box-sizing:border-box}body{place-items:center;min-width:280px;min-height:100svh;margin:0;display:grid}button{font:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent;touch-action:manipulation}button:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.calculator{background:var(--surface);border:1px solid var(--line);border-radius:24px;width:min(100%,430px);margin:32px 0;padding:30px 24px 22px}.header{justify-content:space-between;align-items:center;margin-bottom:38px;display:flex}.identity{flex-direction:column;gap:5px;display:flex}h1{letter-spacing:-2px;margin:0;font-size:35px;font-weight:650;line-height:1}.brand-dot{color:var(--accent)}.subtitle{color:var(--muted);letter-spacing:.02em;font-size:11px}.help-button{border:1px solid var(--line);width:36px;height:36px;color:var(--muted);font:15px var(--mono);background:0 0;border-radius:50%}.display-heading{font:9px var(--mono);letter-spacing:.12em;color:var(--muted);justify-content:space-between;padding-bottom:13px;display:flex}.stack-row{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:16px;min-height:39px;display:flex}.register{font:10px var(--mono);color:var(--muted)}output{font:21px var(--mono);letter-spacing:-.04em;font-variant-numeric:tabular-nums;display:block}.stack-row:not(.current) output{color:var(--muted)}.current{min-height:76px}.current .register{color:var(--accent)}.current output{letter-spacing:-.055em;font-size:43px}.current output.long{font-size:29px}.current output.very-long{font-size:22px}.stack-row:not(.current) output.very-long{font-size:17px}.display-status{justify-content:space-between;align-items:start;gap:8px;min-height:27px;display:flex}#status{color:var(--accent);font-size:10px;line-height:1.3}.entry-indicator{background:var(--line);border-radius:50%;flex:0 0 5px;height:5px;margin-top:2px}.is-entering .entry-indicator{background:var(--accent)}.has-error #entry-state{color:var(--accent)}.keypad{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;display:grid}.key{border:1px solid color-mix(in srgb, var(--line) 50%, transparent);background:var(--key);height:61px;color:var(--text);font:25px var(--mono);-webkit-user-select:none;user-select:none;border-radius:10px;justify-content:center;align-items:center;padding:0;transition:background-color .12s,transform .1s;display:flex}.key:active{filter:brightness(.93);transform:translateY(2px)}.utility{background:var(--utility);font-size:18px}.small-symbol{font-size:20px}.operator{background:var(--operator);color:var(--accent);font-size:30px}.clear{font:15px var(--mono);color:var(--muted);background:var(--utility)}.enter{background:var(--enter);color:var(--enter-text);font:18px var(--mono);border-color:#0000;grid-column:span 2;justify-content:space-between;padding:0 23px}.enter span{font-size:23px}footer{font:8px var(--mono);letter-spacing:.09em;color:var(--muted);justify-content:space-between;gap:8px;margin-top:23px;display:flex}.footer-dot{color:var(--accent)}dialog{border:1px solid var(--line);background:var(--surface);width:min(420px,100% - 32px);max-height:calc(100svh - 32px);color:var(--text);border-radius:20px;padding:26px;box-shadow:0 24px 100px #0003}dialog::backdrop{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#15181385}.help-header{justify-content:space-between;align-items:center;display:flex}.eyebrow{font:10px var(--mono);letter-spacing:.12em;color:var(--muted)}#help-close{width:40px;height:40px;color:var(--text);background:var(--utility);border:0;border-radius:50%;font-size:24px}h2{letter-spacing:-.04em;margin:24px 0;font-size:28px;font-weight:550;line-height:1.2}dialog p{font-size:13px;line-height:1.65}.example{align-items:center;gap:8px;margin:18px 0 24px;display:flex}kbd{font:11px var(--mono);border:1px solid var(--line);background:var(--key);border-radius:5px;padding:3px 6px}.example kbd{padding:10px 12px;font-size:13px}.example span{font:15px var(--mono);color:var(--accent);margin-left:auto}dl{margin:24px 0}dl div{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:10px;padding:8px 0;display:flex}dt{font:13px var(--mono)}dt kbd{color:var(--muted);margin-left:6px}dd{color:var(--muted);margin:0;font-size:12px}dialog .help-note{color:var(--muted);font-size:11px}@media (hover:hover){.key:hover{background:color-mix(in srgb, var(--key) 88%, var(--text))}.utility:hover,.clear:hover{background:color-mix(in srgb, var(--utility) 88%, var(--text))}.operator:hover{background:color-mix(in srgb, var(--operator) 85%, var(--accent))}.enter:hover{background:color-mix(in srgb, var(--enter) 90%, var(--enter-text))}.help-button:hover{color:var(--text);border-color:var(--muted)}}@media (width<=480px){:root{background:var(--surface)}.calculator{width:100%;max-width:430px;min-height:100svh;padding:max(24px, env(safe-area-inset-top)) 22px max(20px, env(safe-area-inset-bottom));border:0;border-radius:0;flex-direction:column;margin:0;display:flex}.header{margin-bottom:auto;padding-bottom:20px}.display{padding-top:20px}.key{height:clamp(44px,16.6667svh - 76.6667px,70px)}footer{margin-top:22px}}@media (height<=720px){.calculator{padding-top:max(16px, env(safe-area-inset-top));padding-bottom:max(14px, env(safe-area-inset-bottom))}.header{margin-bottom:0;padding-bottom:15px}.display{padding-top:0}.stack-row{min-height:30px}.current{min-height:62px}.display-heading{padding-bottom:9px}.key{height:49px}.keypad{gap:6px}footer{margin-top:16px}}@media (height<=660px){h1{font-size:28px}.subtitle{font-size:10px}.header{padding-bottom:8px}.stack-row{min-height:26px}.current{min-height:52px}.current output{font-size:34px}.display-status{min-height:18px}.key{height:44px}.keypad{gap:5px}footer{margin-top:10px}}@media (width<=350px){.calculator{padding-inline:16px}.current output.long{font-size:24px}.current output.very-long{font-size:18px}footer{font-size:7px}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important}}