/* layout.css — shell (status strip, sticky header, banners, footer), sections and grids (docs/05-design.md §4.3, §4.4, §4.7) */

/* ---------- status strip ---------- */
.strip{height:var(--strip-h);background:var(--strip);border-bottom:1px solid var(--line);font:500 11.5px/1 var(--mono);color:var(--text-3);white-space:nowrap;overflow:hidden}
.strip-in{height:100%;display:flex;align-items:center;gap:18px}
.strip .badge{display:inline-flex;align-items:center;gap:6px;padding:4px 9px;border:1px dashed rgba(244,183,40,.45);border-radius:999px;color:var(--gold-dim);font:500 11px/1 var(--sans)}
.strip .badge.pre{border-color:var(--line-3);color:var(--text-2)}
.strip .net{display:inline-flex;align-items:center;gap:7px;color:var(--text-2)}
.strip .net i{width:6px;height:6px;border-radius:50%;background:var(--up);box-shadow:0 0 0 3px rgba(62,207,142,.14)}
.strip .net.bad i{background:var(--down);box-shadow:0 0 0 3px rgba(242,98,110,.14)}
.strip b{color:var(--text-2);font-weight:500}
.strip .lbl{font-family:var(--sans)}
.strip .r{margin-left:auto;display:flex;align-items:center;gap:18px}
.strip .px b{color:var(--text)}
.strip .pend-s{font:500 11px/1 var(--sans);color:var(--text-3)}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:40;height:var(--hdr);background:rgba(7,8,10,.82);-webkit-backdrop-filter:saturate(150%) blur(14px);backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid var(--line)}
.hdr-in{height:100%;display:flex;align-items:center;gap:20px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mk{color:var(--text-2)}
.logo-tx{font:600 15px/1 var(--mono);letter-spacing:.16em}
.logo-zh{padding-left:10px;border-left:1px solid var(--line-2);font:600 14px/1 var(--sans);letter-spacing:.12em;color:var(--text-2)}
html[lang="en"] .logo-zh{display:none}
.nav{display:flex;gap:2px;margin-left:8px}
.nav a{position:relative;padding:7px 12px;font-size:14px;color:var(--text-2);border-radius:6px;transition:color .15s,background-color .15s;white-space:nowrap}
.nav a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav a.on{color:var(--text)}
.nav a.on::after{content:"";position:absolute;left:12px;right:12px;bottom:-10px;height:1px;background:var(--gold)}
.hdr-r{margin-left:auto;display:flex;align-items:center;gap:8px;min-width:0}
.search{display:flex;align-items:center;gap:8px;width:230px;height:34px;padding:0 7px 0 10px;border:1px solid var(--line-2);border-radius:var(--r-ctl);background:rgba(255,255,255,.02);color:var(--text-3);transition:border-color .15s}
.search:focus-within{border-color:var(--g50)}
.search input{flex:1;min-width:0;background:none;border:0;outline:0;font-size:13px;color:var(--text)}
.search input::placeholder{color:var(--text-3)}
.kbd{font:500 11px/16px var(--mono);padding:0 5px;border:1px solid var(--line-2);border-radius:4px;color:var(--text-3)}
.lang{display:inline-flex;height:34px;padding:3px;border:1px solid var(--line-2);border-radius:var(--r-ctl);flex:none}
.lang button{min-width:32px;padding:0 8px;border-radius:5px;font:500 12px/1 var(--sans);color:var(--text-3);transition:color .15s,background-color .15s}
.lang button:hover{color:var(--text-2)}
.lang button[aria-pressed="true"]{background:rgba(255,255,255,.09);color:var(--text)}
.burger{display:none;width:34px;height:34px;border:1px solid var(--line-2);border-radius:var(--r-ctl);align-items:center;justify-content:center;color:var(--text-2);flex:none}
.burger[aria-expanded="true"]{color:var(--text);border-color:var(--line-3)}

/* mobile menu sheet (under the header) */
.mmenu{position:fixed;left:0;right:0;top:var(--hdr);z-index:39;background:rgba(10,11,14,.97);border-bottom:1px solid var(--line-2);padding:10px var(--gut) 18px;animation:fadein .15s ease}
.mmenu nav{display:grid;gap:2px}
.mmenu nav a{display:flex;align-items:center;justify-content:space-between;height:46px;padding:0 4px;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-2)}
.mmenu nav a.on{color:var(--text)}
.mmenu nav a.on::after{content:"";width:6px;height:6px;background:var(--gold)}
.mmenu .search{display:flex;width:100%;margin-top:14px;height:40px}

/* ---------- site banners (read errors, treasury notice, flywheel off) ---------- */
.banners:empty{display:none}
.banner{display:flex;align-items:center;gap:10px;min-height:38px;padding:9px 0;font-size:12.5px;line-height:1.5}
.banner-row{border-bottom:1px solid var(--line)}
.banner-row.err{background:rgba(242,98,110,.06);border-bottom-color:rgba(242,98,110,.22);color:#f5a3aa}
.banner-row.warn{background:var(--g06);border-bottom-color:var(--g30);color:#f1d9a0}
.banner-row.info{background:rgba(255,255,255,.025);color:var(--text-2)}
.banner .spin{width:12px;height:12px;border-radius:50%;border:1.5px solid rgba(242,98,110,.3);border-top-color:var(--down);animation:spin .9s linear infinite;flex:none}
.banner .sq{width:7px;height:7px;background:var(--gold);flex:none}
.banner b{margin-left:auto;font:500 11.5px/1 var(--mono);color:var(--text-3);white-space:nowrap}

/* ---------- sections ---------- */
.sect{position:relative;padding:56px 0 64px;border-bottom:1px solid var(--line)}
.sect>.wrap{position:relative}
/* 11 px "+" registration marks at the gutters on the hairline above */
.sect>.wrap::before,.sect>.wrap::after{content:"";position:absolute;top:-62px;width:11px;height:11px;pointer-events:none;
  background:linear-gradient(var(--line-3),var(--line-3)) center/1px 11px no-repeat,linear-gradient(var(--line-3),var(--line-3)) center/11px 1px no-repeat}
.sect>.wrap::before{left:calc(var(--gut) - 6px)}
.sect>.wrap::after{right:calc(var(--gut) - 6px)}
.sect.nox>.wrap::before,.sect.nox>.wrap::after{display:none}
.sect.last{border-bottom:0}
.sh{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:20px}
.sh>div:first-child{min-width:0}
.kick{font:500 12px/1 var(--mono);color:var(--text-3);margin-bottom:12px;white-space:nowrap}
.kick .kb{color:var(--text-4)}.kick .kk{color:var(--text-3)}.kick .kv{color:var(--gold)}
.h2{display:flex;align-items:baseline;flex-wrap:wrap;gap:4px 12px;font:600 24px/1.25 var(--sans);letter-spacing:-.01em}
.h2 small{font:400 13.5px/1.3 var(--sans);color:var(--text-3);letter-spacing:0}
.sub{margin-top:8px;font-size:14px;line-height:1.7;color:var(--text-2)}
.sh-r{display:flex;align-items:center;gap:10px;min-width:0}
.lnk{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);white-space:nowrap;transition:color .15s}
.lnk:hover{color:var(--text)}

/* page head (non-home pages) */
.page-top{padding:30px 0 28px}
.h1s{font:700 40px/1.15 var(--sans);letter-spacing:-.01em}
.page-top .sub{max-width:47em}
.crumb{display:flex;align-items:center;gap:8px;margin-bottom:16px;font:500 12px/1 var(--mono);color:var(--text-3)}
.crumb a:hover{color:var(--text)}
.crumb b{color:var(--text-2);font-weight:500}

/* ---------- grids ---------- */
.board-grid{display:grid;grid-template-columns:minmax(0,1fr) 352px;gap:20px;align-items:stretch}
.split{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);gap:20px}
.split>*{min-width:0}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}
.two>*{min-width:0}

/* ---------- footer ---------- */
.foot{padding:36px 0 56px;font-size:12.5px;color:var(--text-3);border-top:1px solid var(--line)}
.foot-in{display:flex;justify-content:space-between;align-items:flex-start;gap:24px 40px;flex-wrap:wrap}
.foot-brand{display:flex;flex-direction:column;gap:12px;max-width:640px}
.foot-brand p{line-height:1.75}
.foot-brand .risk{color:var(--text-4);font-size:12px}
.foot-links{display:flex;gap:22px;flex-wrap:wrap}
.foot-links a{color:var(--text-2);transition:color .15s}
.foot-links a:hover{color:var(--text)}
.foot-links .off{color:var(--text-4)}
.foot .note{align-self:flex-start;font:500 11px/1 var(--sans);color:var(--text-3);border:1px dashed var(--line-3);border-radius:999px;padding:5px 10px}
.foot .note.dev{color:var(--gold-dim);border-color:rgba(244,183,40,.45)}

/* ---------- responsive ---------- */
@media (max-width:1240px){
  .board-grid{grid-template-columns:minmax(0,1fr)}
  .search{display:none}
  .split{grid-template-columns:minmax(0,1fr);row-gap:48px}
}
@media (max-width:1100px){
  .strip .hide-m{display:none}
}
@media (max-width:900px){
  .two{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:760px){
  .strip{font-size:10.5px}
  .strip-in{gap:10px}
  .strip .hide-s{display:none}
  .hdr-in{gap:10px}
  .nav,.logo-zh{display:none}
  .burger{display:inline-flex}
  .lang button{min-width:28px;padding:0 6px}
  .sect{padding:40px 0 44px}
  .sect>.wrap::before,.sect>.wrap::after{top:-46px}
  .sh{flex-direction:column;align-items:stretch;gap:14px}
  .sh-r{overflow-x:auto;scrollbar-width:none;margin:0 calc(var(--gut) * -1);padding:0 var(--gut)}
  .sh-r::-webkit-scrollbar{display:none}
  .h2{font-size:21px}
  .page-top{padding:22px 0 20px}
  .h1s{font-size:30px}
  .foot-in{flex-direction:column}
  .banner{font-size:12px}
}