:root{--bg:#f6f7f9;--surface:#fff;--ink:#17202e;--muted:#5d6b7e;--line:#e2e6ec;--brand:#2563eb;--brand-ink:#fff;--brand-soft:#e8effd;--ok:#15803d;--ok-soft:#e3f6e9;--warn:#a15c07;--warn-soft:#fdf1dc;--err:#b42318;--err-soft:#fde8e6;--code:#0f172a;--code-ink:#e2e8f0;--radius:10px;--shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08)}
@media (prefers-color-scheme:dark){:root{--bg:#0e131b;--surface:#161d28;--ink:#e6ebf2;--muted:#9aa8bb;--line:#273142;--brand:#5b8cff;--brand-ink:#0b1220;--brand-soft:#1b2745;--ok:#4ade80;--ok-soft:#10301d;--warn:#fbbf24;--warn-soft:#38290b;--err:#f87171;--err-soft:#3b1513;--code:#0a0f17;--code-ink:#d6deea;--shadow:none}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
h1{font-size:1.5rem;margin:0 0 .25rem}h2{font-size:1.15rem;margin:0 0 .6rem}h3{font-size:1rem;margin:0 0 .4rem}
p{margin:.4rem 0 .8rem}.muted{color:var(--muted)}.small{font-size:.86rem}.mono,code,pre{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
code{background:var(--brand-soft);padding:.1em .35em;border-radius:5px;font-size:.88em}
.container{max-width:1080px;margin:0 auto;padding:0 16px}
/* site */
.site-nav{background:var(--surface);border-bottom:1px solid var(--line)}.site-nav .container{display:flex;align-items:center;gap:20px;height:60px}
.logo{font-weight:800;font-size:1.15rem;color:var(--ink)}.logo span{color:var(--brand)}.spacer{flex:1}
.site-nav a.link{color:var(--ink)}.lang a{padding:2px 6px;border-radius:6px;color:var(--muted)}.lang a.on{background:var(--brand-soft);color:var(--brand);font-weight:600}
.hero{padding:72px 0 48px;text-align:center}.hero h1{font-size:2.4rem;line-height:1.15;max-width:760px;margin:0 auto 14px}.hero p{max-width:640px;margin:0 auto 24px;font-size:1.08rem;color:var(--muted)}
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin:24px 0 40px}
.flow{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;margin:8px 0 32px}.flow .node{padding:10px 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius)}.flow .arrow{color:var(--muted)}
.prose{max-width:760px;margin:32px auto}.prose h1{margin-bottom:12px}.prose h2{margin-top:28px}.prose pre{background:var(--code);color:var(--code-ink);padding:14px;border-radius:var(--radius);overflow:auto;font-size:.85rem}.prose pre code{background:none;padding:0;color:inherit}.prose table{border-collapse:collapse;width:100%}.prose th,.prose td{border:1px solid var(--line);padding:6px 10px;text-align:left}.prose blockquote{margin:12px 0;padding:8px 14px;border-left:3px solid var(--brand);background:var(--brand-soft);border-radius:0 8px 8px 0}
.docs{display:grid;grid-template-columns:230px 1fr;gap:32px;align-items:start}.docs nav a{display:block;padding:7px 10px;border-radius:8px;color:var(--ink)}.docs nav a.on{background:var(--brand-soft);color:var(--brand);font-weight:600}
.site-footer{border-top:1px solid var(--line);padding:24px 0;margin-top:48px;color:var(--muted);font-size:.9rem}
/* panel */
.panel{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.side{background:var(--surface);border-right:1px solid var(--line);padding:18px 12px;position:sticky;top:0;height:100vh;overflow:auto}
.side .logo{display:block;padding:0 10px 14px}.side a.item{display:flex;gap:10px;align-items:center;padding:9px 10px;border-radius:8px;color:var(--ink);margin-bottom:2px}.side a.item:hover{background:var(--bg);text-decoration:none}.side a.item.on{background:var(--brand-soft);color:var(--brand);font-weight:600}
.side .group{margin:16px 10px 6px;font-size:.74rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.main{padding:24px 28px 56px;min-width:0}.topbar{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}.topbar .who{margin-left:auto;display:flex;gap:12px;align-items:center;color:var(--muted)}
.menu-toggle{display:none}
.pagehead{display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:18px}.pagehead .actions{margin-left:auto;display:flex;gap:8px;flex-wrap:wrap}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);margin-bottom:16px}
.card.flat{box-shadow:none}.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.g3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.g4{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.stat .n{font-size:1.9rem;font-weight:700;line-height:1.1}.stat .l{color:var(--muted);font-size:.86rem}
.hint{background:var(--brand-soft);border-radius:var(--radius);padding:12px 14px;margin-bottom:16px;color:var(--ink)}.hint b{color:var(--brand)}
.alert{padding:11px 14px;border-radius:var(--radius);margin-bottom:14px;border:1px solid transparent}.alert.success{background:var(--ok-soft);color:var(--ok)}.alert.error{background:var(--err-soft);color:var(--err)}.alert.warn{background:var(--warn-soft);color:var(--warn)}
/* buttons / forms */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font:inherit;cursor:pointer;line-height:1.2}.btn:hover{text-decoration:none;filter:brightness(.97)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--brand-ink);font-weight:600}.btn.danger{color:var(--err);border-color:var(--err-soft)}.btn.sm{padding:5px 10px;font-size:.86rem}.btn.lg{padding:12px 22px;font-size:1.02rem}
.field{margin-bottom:14px}.field label{display:block;font-weight:600;margin-bottom:4px}.field .help{color:var(--muted);font-size:.86rem;margin-top:4px}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],select,textarea{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font:inherit}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:-1px}textarea{min-height:110px}textarea.tall{min-height:340px}
.err-text{color:var(--err);font-size:.86rem;margin-top:4px}.check{display:flex;gap:8px;align-items:flex-start}.check input{margin-top:5px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.row>*{flex:1;min-width:140px}.row>.fixed{flex:0 0 auto}
/* tables */
.tablewrap{overflow-x:auto}table.t{width:100%;border-collapse:collapse}table.t th{text-align:left;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:8px 10px;border-bottom:1px solid var(--line);white-space:nowrap}table.t td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}table.t tr:last-child td{border-bottom:0}table.t tr.click:hover{background:var(--bg)}
.badge{display:inline-block;padding:2px 9px;border-radius:99px;font-size:.78rem;font-weight:600;white-space:nowrap}.badge.ok{background:var(--ok-soft);color:var(--ok)}.badge.warn{background:var(--warn-soft);color:var(--warn)}.badge.err{background:var(--err-soft);color:var(--err)}.badge.muted{background:var(--bg);color:var(--muted);border:1px solid var(--line)}.badge.info{background:var(--brand-soft);color:var(--brand)}
.codebox{display:flex;gap:8px;align-items:stretch}.codebox code,.codebox input{flex:1;background:var(--code);color:var(--code-ink);padding:10px 12px;border-radius:8px;overflow:auto;white-space:nowrap;border:0;font-size:.86rem}
pre.json{background:var(--code);color:var(--code-ink);padding:14px;border-radius:var(--radius);overflow:auto;max-height:420px;font-size:.82rem;margin:0;white-space:pre-wrap;word-break:break-all}
/* checklist + steps */
.checklist{list-style:none;margin:0;padding:0}.checklist li{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);align-items:center}.checklist li:last-child{border-bottom:0}.dot{flex:0 0 26px;height:26px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-size:.8rem;font-weight:700;color:var(--muted)}.dot.done{background:var(--ok);border-color:var(--ok);color:#fff}
ol.steps{padding-left:0;list-style:none;counter-reset:s;margin:0}ol.steps li{counter-increment:s;position:relative;padding:4px 0 12px 38px}ol.steps li::before{content:counter(s);position:absolute;left:0;top:2px;width:26px;height:26px;border-radius:50%;background:var(--brand);color:var(--brand-ink);display:grid;place-items:center;font-weight:700;font-size:.85rem}
.bars{display:flex;gap:8px;align-items:flex-end;height:120px}.bars .b{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:4px;height:100%}.bars .b i{display:block;width:100%;background:var(--brand);border-radius:5px 5px 0 0;min-height:2px}.bars .b span{font-size:.72rem;color:var(--muted)}
.meter{height:8px;border-radius:99px;background:var(--bg);border:1px solid var(--line);overflow:hidden}.meter>i{display:block;height:100%;background:var(--brand)}.meter.hot>i{background:var(--err)}
.pager{display:flex;gap:10px;align-items:center;justify-content:center;margin-top:14px;color:var(--muted)}
.choice{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}.choice a.opt{display:block;border:2px solid var(--line);border-radius:var(--radius);padding:18px;color:var(--ink);background:var(--surface)}.choice a.opt:hover{border-color:var(--brand);text-decoration:none}.choice a.opt.on{border-color:var(--brand);background:var(--brand-soft)}
.rule{border:1px dashed var(--line);border-radius:var(--radius);padding:12px;margin-bottom:10px;background:var(--bg)}.cond{display:grid;grid-template-columns:1.5fr 1.1fr 1.7fr auto;gap:8px;margin-bottom:8px;align-items:center}.cond .path{display:none}.cond.has-path{grid-template-columns:1.4fr 1fr 1fr 1.2fr 1.6fr auto}.cond.has-path .path{display:block}
.auth{max-width:420px;margin:56px auto}.auth .card{padding:26px}
.sr{position:absolute;left:-9999px}
@media (max-width:820px){.panel{grid-template-columns:1fr}.side{position:fixed;inset:0 25% 0 0;z-index:20;transform:translateX(-102%);transition:transform .2s;height:100vh}.side.open{transform:none;box-shadow:0 0 40px rgba(0,0,0,.35)}.menu-toggle{display:inline-flex}.main{padding:16px 14px 48px}.docs{grid-template-columns:1fr}.hero h1{font-size:1.8rem}.cond,.cond.has-path{grid-template-columns:1fr}}
.logo{display:inline-flex;align-items:center;gap:8px}.logo img{display:block;border-radius:7px}

.ajax-bar{position:fixed;top:0;left:0;height:3px;width:0;background:var(--brand);z-index:100;opacity:0;transition:opacity .2s}
.ajax-bar.on{opacity:1;width:85%;transition:width 8s cubic-bezier(.1,.6,.2,1),opacity .1s}
body.is-busy .main{opacity:.65;transition:opacity .15s}body.is-busy{cursor:progress}
.ajax-toast{position:fixed;left:50%;bottom:20px;transform:translate(-50%,20px);background:var(--err);color:#fff;padding:10px 16px;border-radius:var(--radius);box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.2s;z-index:101;max-width:90vw}
.ajax-toast.show{opacity:1;transform:translate(-50%,0)}