:root{
  --bg:#0d1017; --surface:#151a23; --surface-2:#1c232f; --line:#2b3444;
  --ink:#eef2f8; --ink-dim:#a3b0c2; --accent:#4f8cff; --accent-strong:#2f66d8;
  --ok:#3ddc97; --warn:#ffc043; --bad:#ff7b7b;
  --r:14px; --r-sm:9px; --pad:20px;
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --shadow:0 10px 30px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3{margin:0;letter-spacing:-.02em;line-height:1.2}
h1{font-size:clamp(22px,3vw,30px)}
h2{font-size:20px}
h3{font-size:16px}
p{margin:0}
a{color:var(--accent)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}

/* ---------- shell ---------- */
.shell{display:grid;grid-template-columns:248px 1fr;min-height:100vh}
.side{background:var(--surface);border-right:1px solid var(--line);padding:18px 14px;display:flex;flex-direction:column;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;padding:4px 6px}
.brand .dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(140deg,var(--accent),#8b5cf6);display:grid;place-items:center;font-size:14px;color:#fff}
.nav{display:flex;flex-direction:column;gap:4px}
.nav a{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:var(--r-sm);color:var(--ink-dim);text-decoration:none;font-weight:500;min-height:44px;transition:background .15s,color .15s}
.nav a:hover{background:var(--surface-2);color:var(--ink)}
.nav a[aria-current="page"]{background:var(--accent-strong);color:#fff}
.side-foot{margin-top:auto;font-size:13px;color:var(--ink-dim);padding:0 6px}
.main{padding:26px clamp(16px,3vw,34px) 90px;min-width:0}
.page-head{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-bottom:24px;padding-right:190px}
@media (max-width:700px){.page-head{padding-right:0}}
.page-head .sub{color:var(--ink-dim);margin-top:6px;max-width:62ch}

/* ---------- pieces ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:var(--pad)}
.grid{display:grid;gap:16px}
.grid.stats{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.grid.kbs{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.stat .label{color:var(--ink-dim);font-size:13px;text-transform:uppercase;letter-spacing:.06em}
.stat .value{font-size:30px;font-weight:700;margin-top:6px;font-variant-numeric:tabular-nums}
.grid.tiles{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.tile{display:flex;flex-direction:column;gap:6px;text-decoration:none;color:inherit;padding:22px;transition:border-color .15s,transform .15s}
.tile:hover,.tile:focus-visible{border-color:var(--accent);transform:translateY(-2px)}
.tile-icon{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;font-size:22px;margin-bottom:8px}
.tile-name{font-weight:650;font-size:17px;letter-spacing:-.01em}
.tile-meta{color:var(--ink-dim);font-size:13.5px}
.back{display:inline-block;color:var(--ink-dim);text-decoration:none;font-size:14px;margin-bottom:14px;min-height:44px;line-height:44px}
.back:hover{color:var(--ink)}
.stack{display:flex;flex-direction:column;gap:16px}
.grow{flex:1}
.quiet-row{margin-top:14px}
.linkish{background:none;border:0;color:var(--ink-dim);text-decoration:underline;cursor:pointer;font:inherit;padding:10px 0;min-height:44px}
.linkish:hover{color:var(--ink)}
.check{display:flex;gap:10px;align-items:center;min-height:44px;font-weight:500}
.check input{width:20px;height:20px;flex:none}
.code{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px;overflow:auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;line-height:1.5;color:var(--ink-dim);max-height:112px;white-space:pre-wrap;word-break:break-all;margin:12px 0}
.form-narrow{max-width:720px}
.code.one-line{max-height:none;white-space:pre-wrap}
.ok-note{color:var(--ok)!important}
.meta{display:flex;flex-wrap:wrap;gap:8px;font-size:12px;color:var(--ink-dim)}
.pill{background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:3px 9px}
.pill.sample{color:var(--warn);border-color:#4a3c17}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:var(--r-sm);border:1px solid var(--line);background:var(--surface-2);color:var(--ink);font:inherit;font-weight:600;cursor:pointer;transition:filter .15s,background .15s}
.btn:hover{filter:brightness(1.15)}
.btn.primary{background:var(--accent-strong);border-color:transparent;color:#fff}
.btn.danger{color:var(--bad)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}

label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}
.hint{color:var(--ink-dim);font-size:13px;font-weight:400;margin-top:4px}
input[type=text],input[type=color],textarea,select{width:100%;background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px;font:inherit;min-height:44px}
textarea{min-height:180px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px}
input[type=color]{padding:4px;height:46px;cursor:pointer}
.field{margin-bottom:18px}
.field.bad input,.field.bad textarea{border-color:var(--bad)}
.err{color:var(--bad);font-size:13px;margin-top:6px;display:flex;gap:6px}
.banner{border-radius:var(--r-sm);padding:12px 14px;margin-bottom:16px;border:1px solid}
.banner.ok{background:rgba(61,220,151,.1);border-color:rgba(61,220,151,.4);color:var(--ok)}
.banner.bad{background:rgba(255,123,123,.1);border-color:rgba(255,123,123,.4);color:var(--bad)}
.empty{text-align:center;padding:46px 20px;color:var(--ink-dim)}
.empty h3{color:var(--ink);margin-bottom:8px}
.skeleton{background:linear-gradient(90deg,var(--surface-2),#232c3a,var(--surface-2));background-size:200% 100%;animation:shimmer 1.3s linear infinite;border-radius:var(--r);height:96px}
@keyframes shimmer{to{background-position:-200% 0}}
.faq-list{display:flex;flex-direction:column;gap:10px;margin-top:12px}
.faq{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-sm);padding:14px}
.faq .q{font-weight:600}
.faq .a{color:var(--ink-dim);font-size:14px;margin-top:4px}
.faq .row{margin-top:10px}
.faq .btn{min-height:38px;padding:6px 12px;font-size:14px}
.split{display:grid;grid-template-columns:1fr 340px;gap:18px;align-items:start}
.swatches{display:flex;gap:8px;flex-wrap:wrap}
.swatch-btn{width:44px;height:44px;border-radius:50%;border:2px solid var(--line);cursor:pointer}
.swatch-btn[aria-pressed="true"]{border-color:var(--ink);transform:scale(1.08)}
.icon-btns{display:flex;gap:8px;flex-wrap:wrap}
.icon-btn{min-width:52px;min-height:44px;font-size:19px}
.icon-btn[aria-pressed="true"]{background:var(--accent-strong);color:#fff;border-color:transparent}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.signin{border:1px solid var(--line);border-radius:var(--r-sm);padding:12px;margin-top:10px;background:var(--surface-2);font-size:13px;color:var(--ink-dim);display:flex;flex-direction:column;gap:8px}
.signin .btn{width:100%}

@media (max-width:860px){
  .shell{grid-template-columns:1fr}
  .side{border-right:0;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
  .nav{flex-direction:row;overflow-x:auto;gap:6px}
  .nav a{white-space:nowrap}
  .side-foot{display:none}
  .signin{flex-direction:row;align-items:center;flex-wrap:wrap;margin-top:6px}
  .signin .btn{width:auto}
  .signin .hint{display:none}
  .split{grid-template-columns:1fr}
  .main{padding-bottom:120px}
}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition:none!important}}