:root{--paper:#f7f6f2;--ink:#202a32;--muted:#58656e;--line:#d9dedb;--accent:#315caa;--light:#fff;--radius:18px}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.75}a{color:var(--accent);text-underline-offset:4px}a:hover{opacity:.8}button,input,textarea,select{font:inherit}button,a,input,textarea,select{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--accent)}.skip{position:absolute;left:1rem;top:-5rem;background:white;padding:.6rem;z-index:20}.skip:focus{top:1rem}.wrap{max-width:1120px;margin:auto;padding:0 28px}header{border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:90px}.brand{font-weight:800;letter-spacing:.06em;color:var(--ink);text-decoration:none;font-size:19px}.brand small{font-weight:400;letter-spacing:0;font-size:12px;display:block;color:var(--muted)}nav{display:flex;gap:24px;font-size:14px}nav a{text-decoration:none;color:var(--ink)}.hero{padding:72px 0 45px;max-width:820px}.eyebrow{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--accent);font-weight:700}h1{font-size:clamp(30px,4.5vw,52px);line-height:1.3;letter-spacing:-.03em;margin:18px 0 22px}h2{font-size:25px;line-height:1.4;margin:0 0 20px}h3{font-size:19px}.lead{font-size:18px;color:var(--muted);max-width:700px}.badge{display:inline-block;padding:4px 12px;border:1px solid var(--line);border-radius:30px;font-size:12px;margin:0 8px 8px 0;color:var(--muted)}.grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(0,1fr);gap:28px;align-items:start}.card{background:var(--light);border:1px solid var(--line);border-radius:var(--radius);padding:30px;min-width:0}.aside{background:#ecefea}.aside p{color:var(--muted);font-size:14px}.field{display:flex;flex-direction:column;gap:7px;margin:0 0 18px}.field span{font-size:14px;font-weight:600}.fields{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}input,select,textarea{width:100%;padding:12px 14px;border:1px solid #9ea9a8;border-radius:9px;background:white;color:var(--ink);min-width:0}input[type=checkbox]{width:auto;accent-color:var(--accent)}input[type=file]{padding:8px;font-size:14px}textarea{resize:vertical;min-height:145px;font-family:ui-monospace,Consolas,monospace;font-size:14px}.checks{display:flex;gap:12px 20px;flex-wrap:wrap;margin:14px 0 20px}.checks label{font-size:14px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}button,.button{border:1px solid var(--accent);border-radius:9px;padding:10px 20px;background:var(--accent);color:white;cursor:pointer;font-weight:600;text-decoration:none;display:inline-block}button.secondary{background:transparent;color:var(--accent)}button:disabled{opacity:.45;cursor:default}.result{display:block;white-space:pre-wrap;overflow-wrap:anywhere;font-family:ui-monospace,Consolas,monospace;background:#f2f5f4;border-radius:12px;padding:20px;margin-top:24px;min-height:85px;font-size:14px}.error{color:#8b2135}.hint{font-size:13px;color:var(--muted)}.guide-entry{margin:35px 0 65px;display:grid;grid-template-columns:1fr 2fr;gap:35px;border-top:1px solid var(--line);padding-top:30px}.guide-entry p{margin:0;color:var(--muted)}.article{max-width:820px;padding-bottom:65px}.article section{margin:38px 0}.article p{margin:15px 0}.article li{margin:10px 0}.toc{background:#ecefea;border-radius:14px;padding:24px 30px}.meta{font-size:13px;color:var(--muted)}footer{border-top:1px solid var(--line);padding:28px 0;font-size:13px;color:var(--muted)}.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.footlinks{display:flex;gap:20px;flex-wrap:wrap}.foot a{color:var(--muted)}.divider{border:0;border-top:1px solid var(--line);margin:26px 0}details summary{cursor:pointer;font-weight:600}noscript{display:block;border:1px solid #8b2135;padding:18px;margin-bottom:20px}body[data-tool=password] .result{font-size:19px}body[data-tool=cost] .result{font-size:16px}@media(max-width:760px){.wrap{padding:0 20px}.nav{align-items:flex-start;padding:20px 0;gap:15px}.brand{font-size:15px}nav{gap:13px;font-size:13px;flex-wrap:wrap;justify-content:flex-end}.hero{padding:40px 0 28px}.grid{grid-template-columns:1fr}.card{padding:23px}.fields{grid-template-columns:1fr}.guide-entry{grid-template-columns:1fr;gap:8px;margin-bottom:40px}.lead{font-size:16px}h2{font-size:22px}}

.contrast-preview{border:1px solid var(--line);border-radius:12px;margin-block-start:22px;padding:24px;overflow-wrap:anywhere}
.contrast-preview h3{font-size:24px;font-weight:700;line-height:1.4;margin:0 0 12px;color:inherit}
.contrast-preview p{font-size:16px;margin:0;color:inherit}
#foreground,#background{font-family:ui-monospace,Consolas,monospace;direction:ltr;text-align:start}
[hidden]{display:none!important}

/* Native labels, stable same-page links, and RTL-safe technical identifiers. */
.language-menu{position:relative;z-index:30;font-size:14px;max-width:100%;margin:12px auto;padding:0 20px}
.language-menu summary{cursor:pointer;list-style:none;padding:8px 12px;border:1px solid #9ea9a8;border-radius:8px;width:max-content;max-width:100%;background:#fff;color:#202a32}
.language-menu nav{display:flex;flex-wrap:wrap;gap:8px 12px;background:#fff;border:1px solid #d9dedb;border-radius:10px;padding:14px;margin-block-start:8px;max-width:640px}
.language-menu nav a{color:#202a32;display:inline-block;padding:5px 8px;text-decoration:none}
.language-menu [aria-current=page]{font-weight:800;text-decoration:underline}
.translation-note{font-size:12px;line-height:1.6;color:#58656e;margin-block:16px}
[dir=rtl] .article,[dir=rtl] .guide-article,[dir=rtl] h1,[dir=rtl] h2,[dir=rtl] h3{text-align:start}
[dir=rtl] .repo-name,[dir=rtl] .skill-path,[dir=rtl] .skill-owner,[dir=rtl] .skill-title-link{direction:ltr;unicode-bidi:isolate}
input[type=number],#cidr,#reference,textarea,#hash-result,body[data-tool=password] #result{direction:ltr;unicode-bidi:plaintext;text-align:start}
[dir=rtl] .result{unicode-bidi:plaintext;text-align:start}
[dir=rtl] .skip{left:auto;right:1rem}
nav{flex-wrap:wrap}h1,h2,h3,button,summary{overflow-wrap:anywhere}
@media(max-width:760px){.topbar{flex-wrap:wrap}.top-actions{flex-wrap:wrap;max-width:100%}.language-menu{margin:8px 0}.language-menu nav{gap:6px}.nav{flex-wrap:wrap}.hero h1{font-size:clamp(30px,8vw,52px)}}