/* Static pages (guides, tools, open tests, AI agents): same system as the app. */
@font-face{font-family:'Instrument Sans Variable';font-style:normal;font-display:swap;font-weight:400 700;src:url(fonts/instrument-sans-latin-ext-wght-normal.woff2) format('woff2-variations');unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}
@font-face{font-family:'Instrument Sans Variable';font-style:normal;font-display:swap;font-weight:400 700;src:url(fonts/instrument-sans-latin-wght-normal.woff2) format('woff2-variations');unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root{--bg:#f6f7f9;--surface:#fff;--ink:#15181d;--ink-2:#3a404a;--muted:#646b77;--line:#e2e5ea;--cell:#e3e7ec;--accent:#1f7a4d;--accent-hover:#186240;--accent-ink:#fff;--accent-soft:#e5f1ea}
@media (prefers-color-scheme:dark){:root{--bg:#111317;--surface:#181b20;--ink:#eceef1;--ink-2:#c4c9d1;--muted:#8e95a1;--line:#2a2e35;--cell:#252a31;--accent:#45c483;--accent-hover:#5fd497;--accent-ink:#0b1a12;--accent-soft:#17291f}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 'Instrument Sans Variable',system-ui,-apple-system,'Segoe UI',Roboto,'Noto Sans',sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-underline-offset:2px}a:hover{color:var(--accent-hover)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
p,li{overflow-wrap:anywhere}
.wrap{max-width:720px;margin:0 auto;padding:0 20px 72px}
header{display:flex;gap:14px;align-items:center;padding:20px 0;margin-bottom:28px}
header a{white-space:nowrap;font-size:15px}
.brand{font-weight:650;font-size:17px;text-decoration:none;color:var(--ink);letter-spacing:-.02em;display:inline-flex;align-items:center;gap:.45rem}
.brand::before{content:'';width:1.15rem;height:1.15rem;border-radius:5px;flex:none;background:var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center/72% no-repeat}
.brand span{color:inherit}.grow{flex:1;min-width:0}
select,input,textarea{font:inherit;font-size:16px;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:8px 11px}
input:focus,textarea:focus,select:focus{outline:2px solid var(--accent);outline-offset:-1px;border-color:transparent}
header select{font-size:14px;padding:5px 8px;max-width:130px;background:transparent;color:var(--ink-2)}
h1{font-size:clamp(30px,5vw,44px);line-height:1.1;letter-spacing:-.03em;font-weight:600;margin:0 0 12px}
h2{font-size:23px;line-height:1.3;letter-spacing:-.015em;font-weight:600;margin:44px 0 12px}
h3{font-size:18px;font-weight:600;margin:24px 0 8px}
.muted{color:var(--muted);font-size:14px}.lede{font-size:19px;color:var(--ink-2);line-height:1.6}
p,li{color:var(--ink-2)}b,strong{color:var(--ink);font-weight:600}
ol,ul{padding-left:1.3em}li{margin:6px 0}
.cta{display:flex;flex-direction:column;gap:12px;align-items:flex-start;margin:32px 0;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta span,.cta b{color:var(--ink)}
.btn,button.btn{display:inline-flex;align-items:center;background:var(--accent);color:var(--accent-ink);text-decoration:none;font:inherit;font-weight:600;font-size:16px;padding:11px 20px;border-radius:9px;border:0;cursor:pointer}
.btn:hover{background:var(--accent-hover);color:var(--accent-ink)}
.toc{margin:28px 0;padding:0}.toc b{font-size:14px;color:var(--muted);font-weight:500}
.toc ul{margin:8px 0 0;padding:0;list-style:none;border-left:2px solid var(--line)}
.toc li{margin:0;padding:3px 0 3px 14px;font-size:15px}.toc a{text-decoration:none;color:var(--ink-2)}.toc a:hover{color:var(--accent)}
details{border-bottom:1px solid var(--line);padding:16px 2px;margin:0}
section#faq details:first-of-type,h2+details{border-top:1px solid var(--line)}
summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}summary::after{content:'+';color:var(--muted);font-weight:400;font-size:20px;line-height:1}
details[open] summary::after{content:'−'}details p{margin:10px 0 0}
footer{border-top:1px solid var(--line);margin-top:56px;padding-top:20px;font-size:14px;display:flex;gap:8px 18px;flex-wrap:wrap}
footer a{color:var(--ink-2);text-decoration:none}footer a:hover{color:var(--ink);text-decoration:underline}
.related{padding:0;list-style:none;border-top:1px solid var(--line);margin:0}
.related li{margin:0;border-bottom:1px solid var(--line)}
.related a{display:block;padding:14px 2px;text-decoration:none;color:var(--ink);font-weight:500}.related a:hover{color:var(--accent)}
form{display:grid;gap:16px;min-width:0}label{display:flex;flex-direction:column;gap:5px;font-weight:550;font-size:15px;min-width:0;color:var(--ink)}
form select,form input,form textarea{width:100%;max-width:100%;min-width:0;font-weight:400}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.ans{border-top:1px solid var(--line);padding:16px 0;margin:0}
.ans b{display:block;font-size:15px;margin-bottom:6px}.ans p{margin:0 0 10px;white-space:pre-wrap}
.ans button{font:inherit;font-size:14px;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:4px 12px;color:var(--ink);cursor:pointer}
table{width:100%;border-collapse:collapse;font-size:15px}
td,th{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}th{font-weight:500;color:var(--muted);font-size:13px}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88em}
pre{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px;overflow-x:auto;font-size:13px;line-height:1.55}
.tw{overflow-x:auto}
/* open tests page */
.tests{padding:0;list-style:none;border-top:1px solid var(--line);margin:24px 0}.tests li{margin:0;border-bottom:1px solid var(--line)}
.t{display:flex;gap:14px;align-items:center;padding:14px 2px;text-decoration:none;color:var(--ink)}.t:hover b{color:var(--accent)}
.t img,.t .ph{width:44px;height:44px;border-radius:11px;flex:none;background:var(--cell)}
.t div{min-width:0;flex:1}.t b{display:block;font-weight:600}.t small{color:var(--muted);display:block;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.slots{flex:none;color:var(--accent);font-weight:550;font-size:14px;font-variant-numeric:tabular-nums}
.stats{display:flex;gap:28px;flex-wrap:wrap;font-size:14px;color:var(--muted)}.stats b{font-size:26px;display:block;color:var(--ink);font-variant-numeric:tabular-nums;font-weight:600;letter-spacing:-.02em}
@media (max-width:560px){body{font-size:16px}.wrap{padding:0 16px 56px}header{padding:16px 0;margin-bottom:20px}header select{max-width:104px}.lede{font-size:17px}}
@media (max-width:480px){header>a:last-child:not(.brand){display:none}}