/* 2026 breathing lock: concrete gray, river silt green, signal red */
:root{--conc:#5c6158;--silt:#6b7a4a;--red:#c0392b;--ink:#1c1e1a;--paper:#e8e6dc;--mute:#6e7268;--sans:"Noto Sans SC","PingFang SC",sans-serif;--mono:"IBM Plex Mono",ui-monospace,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}section[id]{scroll-margin-top:64px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.7}
img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}
code{font-family:var(--mono);color:var(--silt)}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--red);color:#fff;padding:8px;z-index:40}
.gatebar{position:sticky;top:0;z-index:30;display:flex;justify-content:space-between;align-items:center;padding:10px 20px;background:#d9d6cc;border-bottom:6px solid var(--conc)}
.nm{font-weight:700}.nm small{display:block;font-family:var(--mono);font-size:11px;font-weight:400;color:var(--mute)}
#nav{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center}#nav a{font-size:13px;color:var(--mute)}#nav a.on{color:var(--red)}
.go{background:var(--silt);color:#fff!important;padding:6px 12px;font-weight:700}
.tog{display:none;background:#fff;border:1px solid var(--conc);padding:6px 10px}
.box{position:relative;min-height:84vh;display:grid;align-items:end}
.box>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.box::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,#e8e6dc 86%)}
.cap{position:relative;z-index:1;padding:36px 7vw 48px;max-width:900px}
.k{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--silt);margin:0 0 8px}
h1,h2,h3{margin:0 0 10px;line-height:1.2}h1{font-size:clamp(1.7rem,4vw,2.9rem)}
.lvl{margin:16px 0;padding:12px;background:#dfe0d4;border-left:8px solid var(--red)}
.lvl strong{display:block;margin:4px 0}.lvl p{margin:0;color:var(--mute);font-size:14px}
.acts{display:flex;flex-wrap:wrap;gap:8px}
.btn{display:inline-flex;align-items:center;padding:9px 14px;background:var(--conc);color:#fff;border:0;font-weight:700;font-size:14px}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--conc);font-weight:400}
.w{width:min(1080px,calc(100% - 32px));margin:0 auto;padding:64px 0}
.mud{background:#dddaca}
.tri,.g2{display:grid;gap:14px;margin-top:16px}.tri{grid-template-columns:repeat(3,1fr)}.g2{grid-template-columns:1fr 1fr}
.tri article,.g2 article{background:#f3f1e8;padding:16px;border:1px solid #c5c3b6}
.warn{border-color:var(--red)!important}ul{margin:0;padding-left:1.1em}
.row{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;margin:36px 0}
.row.flip{direction:rtl}.row.flip>*{direction:ltr}
.n{font-family:var(--mono);color:var(--silt);font-size:12px}figure{margin:0}figcaption{font-size:13px;color:var(--mute);margin-top:6px}
footer{border-top:6px solid var(--conc);background:#cfcbbd}
.end{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:22px 0}
@media(max-width:860px){.tog{display:block}#nav{display:none;position:absolute;top:50px;left:10px;right:10px;flex-direction:column;background:#f3f1e8;padding:10px}#nav.open{display:flex}.tri,.g2,.row{grid-template-columns:1fr}.row.flip{direction:ltr}.box{min-height:0}.cap{padding:28px 18px}.end{flex-direction:column;align-items:flex-start}}