/* Shared header geometry. Do not change approved page bodies or Explorer controls. */
.atlas-nav{box-sizing:border-box;position:sticky;top:0;z-index:40;flex:0 0 auto;background:rgba(9,19,22,.97);border-bottom:1px solid rgba(216,226,223,.13);color:#f5f3ed;font-family:var(--atlas-font);line-height:1.4;backdrop-filter:blur(18px)}
.atlas-nav--explorer{position:relative;top:auto}
/* Viewport-based horizontal coordinates stay identical with and without a scrollbar. */
.atlas-nav__inner{box-sizing:border-box;position:relative;width:calc(100vw - 56px);min-height:76px;margin:0 28px;display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:24px}
.atlas-nav .atlas-nav__brand{display:inline-flex;align-items:center;gap:11px;justify-self:start;color:#f5f3ed;text-decoration:none;white-space:nowrap;font-size:15px;font-weight:800;letter-spacing:-.035em;min-height:44px}
.atlas-nav .atlas-nav__mark{display:block;width:27px;height:27px;flex:none;fill:none;stroke:#d6c19b;stroke-width:1.65;stroke-linecap:butt;stroke-linejoin:miter}
.atlas-nav__name{font-weight:450;color:#99a9ae}
.atlas-nav__links{display:flex;align-items:center;justify-content:center;gap:5px;min-width:0}
.atlas-nav__links a{box-sizing:border-box;display:flex;align-items:center;justify-content:center;min-height:44px;padding:10px 14px;border-radius:9px;font-size:14px;font-weight:550;letter-spacing:0;color:#a6b6bc;white-space:nowrap;text-decoration:none;transition:background 180ms,color 180ms}
.atlas-nav__links a:hover{background:rgba(255,255,255,.055);color:#fff}
.atlas-nav__links a[aria-current="page"]{color:#f5dfb8;background:rgba(214,193,155,.115)}
.atlas-nav__actions{display:flex;align-items:center;justify-content:flex-end;gap:8px;justify-self:end}
.atlas-nav__tools{display:flex;align-items:center;gap:8px}
.atlas-nav .explorer-shell__compare,.atlas-nav .explorer-shell__help{box-sizing:border-box;min-height:40px;border:1px solid rgba(214,226,223,.14);border-radius:10px;background:rgba(255,255,255,.025);color:#a9b7ba;font-family:var(--atlas-font);font-size:12px;font-weight:650}
.atlas-nav .explorer-shell__compare{display:flex;align-items:center;gap:8px;padding:0 12px}
.atlas-nav .explorer-shell__compare #savedCount{display:grid;place-items:center;min-width:22px;height:22px;padding:0 6px;border:0;border-radius:7px;background:rgba(214,193,155,.12);color:#e3cfa9;font:700 10px/1 var(--atlas-mono)}
.atlas-nav .explorer-shell__help{width:40px;padding:0;font-size:14px}
.atlas-nav .explorer-shell__compare:hover,.atlas-nav .explorer-shell__help:hover{background:rgba(255,255,255,.07);color:#fff}
.atlas-nav .explorer-shell__compare.on{color:#e2cda8;border-color:rgba(214,193,155,.34);background:rgba(214,193,155,.08)}
.atlas-nav .atlas-nav__guide{box-sizing:border-box;display:flex;align-items:center;justify-content:center;gap:11px;min-height:40px;padding:0 14px;border:1px solid rgba(214,193,155,.32);border-radius:10px;background:rgba(255,255,255,.025);color:#e4d3b2;font-size:12px;font-weight:650;letter-spacing:0;text-decoration:none;white-space:nowrap;transition:background 180ms,color 180ms,transform 180ms}
.atlas-nav .atlas-nav__guide:hover{background:#d6c19b;border-color:#d6c19b;color:#0b1518;transform:translateY(-1px)}
.atlas-nav a:focus-visible,.atlas-nav button:focus-visible{outline:2px solid #e0c18b;outline-offset:3px}
.atlas-download-status{font-family:var(--atlas-font);font-size:13px;line-height:1.6;color:#c3ced3;margin:12px 0;max-width:38ch;overflow-wrap:anywhere}
.atlas-download-status:empty{display:none}
.atlas-download-status a,.atlas-download-status button{display:inline-flex;align-items:center;min-height:36px;margin:6px 14px 0 0;padding:0;border:0;background:none;font:600 13px/1.4 var(--atlas-font);color:#e0c18b;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.atlas-download-status [hidden]{display:none!important}
@media(max-width:1000px){
 .atlas-nav__inner{width:calc(100vw - 48px);margin:0 24px;min-height:116px;padding:10px 0;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:44px 44px;gap:8px 12px}
 .atlas-nav__brand{grid-column:1;grid-row:1}
 .atlas-nav__actions{display:contents}
 .atlas-nav .atlas-nav__guide{grid-column:2;grid-row:1;min-height:40px;justify-self:end}
 .atlas-nav__links{grid-column:1/-1;grid-row:2;justify-content:flex-start;width:calc(100% - 88px);max-width:350px;gap:4px}
 .atlas-nav__links a{padding:10px 12px;font-size:13px}
 .atlas-nav__tools{position:absolute;right:0;bottom:12px;gap:4px}
 .atlas-nav .explorer-shell__compare{width:40px;padding:0;justify-content:center}
 .atlas-nav .explorer-shell__compare-label{display:none}
 .atlas-nav .explorer-shell__help{width:40px}
}
@media(max-width:420px){
 .atlas-nav .atlas-nav__brand{gap:8px;font-size:13px;letter-spacing:-.035em}
 .atlas-nav .atlas-nav__mark{width:25px;height:25px}
 .atlas-nav__links{gap:2px}
 .atlas-nav__links a{padding:10px 5px;font-size:13px}
 .atlas-nav .atlas-nav__guide{padding:0 11px;gap:8px;font-size:12px}
}
@media(prefers-reduced-motion:reduce){.atlas-nav a{transition:none}.atlas-nav .atlas-nav__guide:hover{transform:none}}

/* EDITORIAL-7: a fourth route, one shared geometry. The Explorer tools remain usable. */
@media(max-width:1000px){
 .atlas-nav__actions{display:flex;grid-column:2;grid-row:1;gap:8px;align-items:center}
 .atlas-nav__tools{position:static;gap:4px}
 .atlas-nav__links{width:100%;max-width:none;justify-content:center;gap:5px}
 .atlas-nav .explorer-shell__compare,.atlas-nav .explorer-shell__help{width:40px;min-height:40px}
}
@media(max-width:600px){
 .atlas-nav__inner{width:calc(100vw - 32px);margin:0 16px;gap:8px 8px}
 .atlas-nav .atlas-nav__brand{gap:7px;font-size:13px}
 .atlas-nav__name{display:none}
 .atlas-nav__actions{gap:6px}
 .atlas-nav .explorer-shell__compare,.atlas-nav .explorer-shell__help{width:40px;min-height:40px}
 .atlas-nav .atlas-nav__guide{padding-inline:10px;gap:6px;font-size:12px}
 .atlas-nav__links{gap:3px}
 .atlas-nav__links a{padding-inline:10px;font-size:13px}
}
@media(max-width:360px){.atlas-nav__links a{padding-inline:7px;font-size:12px}.atlas-nav__links{gap:2px}}