:root{color-scheme:light;--bg:#f6f8fc;--surface:#fff;--text:#18263b;--muted:#586b83;--accent:#245bd6;--border:#dbe3ee;--accent-soft:#edf3ff;--success:#17654f;--danger:#b33342;font-family:"Malgun Gothic","Apple SD Gothic Neo",system-ui,sans-serif;font-size:16px;line-height:1.65;background:var(--bg);color:var(--text)}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}a{color:var(--accent);text-underline-offset:4px}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}img,canvas{max-width:100%}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.8rem,4vw,2.65rem);line-height:1.3;letter-spacing:-.055em;margin-bottom:12px}h2{font-size:1.2rem;line-height:1.4;letter-spacing:-.035em}h3{font-size:1rem}p{max-width:72ch}.site-header{background:#fff;border-bottom:1px solid var(--border);padding:16px max(24px,calc((100vw - 1200px)/2));display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}.brand{font-size:1.15rem;font-weight:800;letter-spacing:-.06em;text-decoration:none;color:var(--text);display:inline-flex;align-items:center;gap:10px}.brand-mark{background:var(--accent);width:27px;height:27px;border-radius:7px;display:inline-grid;place-content:center;color:#fff;font-size:18px;line-height:1}.site-nav{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:.88rem}.site-nav a{color:var(--muted);text-decoration:none}.site-nav a:hover,.site-nav a[aria-current]{color:var(--accent)}.container{width:min(1200px,calc(100% - 48px));margin:0 auto;padding:42px 0 64px}.page-heading{margin-bottom:28px}.page-heading>p{color:var(--muted);margin-bottom:0}.eyebrow{font-size:.83rem;color:var(--accent);font-weight:700;margin-bottom:9px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,360px);gap:22px;align-items:start}.panel{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;min-width:0}.stack{display:flex;flex-direction:column;gap:16px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));gap:18px}.field{display:flex;flex-direction:column;gap:7px;font-size:.9rem;font-weight:600;min-width:0}.field small{font-weight:400;color:var(--muted)}input:not([type=checkbox]):not([type=radio]):not([type=range]):not([type=color]),select,textarea{width:100%;border:1px solid #bac8db;border-radius:8px;background:#fff;color:var(--text);padding:10px 12px;min-width:0}input[type=checkbox],input[type=radio]{accent-color:var(--accent);width:17px;height:17px}input[type=range]{accent-color:var(--accent);width:100%}textarea{resize:vertical;min-height:150px}button,.button{border:1px solid transparent;border-radius:8px;padding:10px 16px;background:var(--accent);color:#fff;font-weight:650;line-height:1.4;text-decoration:none;display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:44px}button:hover,.button:hover{filter:brightness(.94)}button.secondary,.button.secondary{background:#fff;border-color:var(--border);color:var(--text)}button.danger{background:#fff1f2;color:var(--danger);border-color:#efd3d7}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.status{font-size:.9rem;color:var(--success);overflow-wrap:anywhere;min-height:1.5em}.status:empty{min-height:0}.muted,small{color:var(--muted)}.notice{padding:13px 16px;border-radius:9px;background:var(--accent-soft);font-size:.86rem;color:#31517d}.error{color:var(--danger)}.site-footer{border-top:1px solid var(--border);padding:24px;max-width:1200px;margin:auto;font-size:.8rem;color:var(--muted);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.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}:focus-visible{outline:3px solid #e9aa23;outline-offset:3px}button,input,select,textarea{scroll-margin:20px}progress{accent-color:var(--accent);width:100%}details summary{cursor:pointer}table{border-collapse:collapse;width:100%}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--border)}code{font-size:.9em;overflow-wrap:anywhere}.skip-link{position:absolute;left:12px;top:-100px;background:#fff;padding:10px;z-index:20}.skip-link:focus{top:12px}[hidden]{display:none!important}@media(max-width:800px){.workspace{grid-template-columns:1fr}.container{padding-top:28px}.site-header{padding:14px 24px}.site-nav{gap:12px}.panel{padding:20px}}@media(max-width:480px){.container{width:calc(100% - 28px)}.site-header{padding:14px}.site-nav{font-size:.8rem}.panel{padding:16px}.toolbar>.button,.toolbar>button{flex-grow:1}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

h1,h2,h3{text-wrap:balance}html:lang(ko) h1,html:lang(ko) h2,html:lang(ko) p{word-break:keep-all;overflow-wrap:anywhere}button,a,input,select{touch-action:manipulation}input[type=number],output,.numeric{font-variant-numeric:tabular-nums}.language-select{width:auto;max-width:130px;margin-left:auto;font-size:.85rem;padding:7px 10px;min-height:44px}.site-header>.site-nav{margin-left:auto}.site-header:has(.language-select){gap:18px}.site-header .brand{flex-shrink:0;min-height:44px}.brand:before{content:"";width:27px;height:27px;flex-shrink:0;background:url('/assets/favicon.svg') center/contain no-repeat}.brand-mark{display:none}.site-nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 4px}select{min-height:44px}details summary{min-height:44px;padding:10px 0}h2,h3,[id]{scroll-margin-top:16px}@media(max-width:480px){.site-header{gap:6px;padding:8px 14px}.site-header .site-nav{order:3;width:100%;gap:12px}.language-select{min-height:44px}.container{padding-top:20px}.page-heading{margin-bottom:20px}}

/* Mirror navigation for RTL while keeping formulas and canvas coordinates stable. */
html[dir=rtl] .site-header>.site-nav,html[dir=rtl] .language-select{margin-left:0;margin-inline-start:auto}html[dir=rtl] .site-nav{margin-right:0}html[dir=rtl] th,html[dir=rtl] td{text-align:start}html[dir=rtl] .skip-link{left:auto;right:12px}html[dir=rtl] input[type=number],html[dir=rtl] input[type=url],html[dir=rtl] input[type=color],html[dir=rtl] code,html[dir=rtl] canvas,html[dir=rtl] #expression,html[dir=rtl] .clock{direction:ltr;unicode-bidi:isolate}html[dir=rtl] input[type=range]{direction:ltr}.language-select{max-width:180px;min-width:110px}input,textarea{unicode-bidi:plaintext}

h1,h2,h3{overflow-wrap:anywhere}html:lang(ar) :is(h1,h2,h3,.brand,.eyebrow),html:lang(hi) :is(h1,h2,h3,.brand,.eyebrow){letter-spacing:normal}html:lang(ar) .language-select{text-align:start}html:lang(de) :is(h1,h2,h3){hyphens:auto}