/* App shell: rail (sidebar with accordion sections), top bar on phones, main column, page header. */
.app{display:grid;grid-template-columns:220px 1fr;min-height:100vh}
.rail{background:var(--panel);border-right:1px solid var(--line);padding:20px 14px;display:flex;flex-direction:column;gap:6px;position:sticky;top:0;height:100vh}
.brand{display:flex;align-items:center;gap:10px;padding:4px 8px 18px}
.wordmark{font-weight:700;color:var(--accent);letter-spacing:-.01em}.wordmark span{color:var(--brand)}
.brand-mark{width:30px;height:30px;border-radius:5px;background:var(--brand);color:var(--accent-ink);display:grid;place-items:center;font-family:var(--mono);font-weight:600;font-size:12px}
.brand b{display:block;font-size:15px;letter-spacing:-.01em}
.brand small{display:block;color:var(--ink-3);font-size:11px}
.nav{display:flex;flex-direction:column;gap:2px}
.nav button{display:flex;align-items:center;justify-content:space-between;gap:8px;width:100%;text-align:left;background:none;border:0;padding:8px 10px;border-radius:5px;color:var(--ink-2);cursor:pointer}
.nav button:hover{background:var(--panel-2);color:var(--ink)}
.nav button.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.nav .count{font-family:var(--mono);font-size:11px;color:var(--ink-3);background:var(--panel-2);padding:1px 6px;border-radius:10px}
.nav button.active .count{background:var(--panel);color:var(--accent)}
.rail-foot{margin-top:auto;font-size:11px;color:var(--ink-3);padding:8px 10px;border-top:1px solid var(--line)}
.rail-foot .dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--ink-3);margin-right:6px;vertical-align:middle}
.rail-foot .dot.on{background:var(--accent)}
.main{padding:28px 36px 60px;width:100%;min-width:0;box-sizing:border-box;margin:0}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.page-head p{margin:4px 0 0;color:var(--ink-3)}
.actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.user{font-size:12px;color:var(--ink-2);padding:6px 10px;display:flex;justify-content:space-between;align-items:center;gap:8px}
.user button{font-size:12px}

@media (max-width:900px){
  .app{grid-template-columns:1fr}
  .rail{position:static;height:auto;flex-direction:row;flex-wrap:wrap;align-items:center}
  .rail .brand{padding:4px 8px}.rail-foot{display:none}
  .nav{flex-direction:row;flex-wrap:wrap}
  .main{padding:18px 16px 40px}
}

/* rail: sections with submenus */
.nav{gap:2px;overflow-y:auto;min-height:0;flex:1;margin:0 -4px;padding:0 4px}
.nav .ico{flex:none;opacity:.8}
.nav button.top{justify-content:flex-start;gap:10px;font-weight:500;color:var(--ink-2)}
.nav button.top.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.nav .nav-head .chev{margin-left:auto;transition:transform .15s;opacity:.6}
.nav .nav-group.open>.nav-head .chev{transform:rotate(90deg)}
.nav .nav-group.has-active>.nav-head{color:var(--ink)}
.nav .nav-group.has-active>.nav-head .ico{color:var(--accent);opacity:1}
.nav .nav-sub{display:none;flex-direction:column;gap:1px;margin:2px 0 6px 18px;padding-left:10px;border-left:1px solid var(--line)}
.nav .nav-group.open>.nav-sub{display:flex}
.nav button.sub{padding:6px 10px;font-size:14px}
.topbar{display:none}
.rail-scrim{display:none}
@media (max-width:900px){
  .topbar{display:flex;align-items:center;gap:8px;position:sticky;top:0;z-index:30;background:var(--panel);border-bottom:1px solid var(--line);padding:6px 10px}
  .topbar .btn{font-size:18px;padding:4px 10px}
  .rail{position:fixed;top:0;left:0;bottom:0;width:min(290px,85vw);height:100vh;z-index:40;flex-direction:column;flex-wrap:nowrap;align-items:stretch;transform:translateX(-100%);transition:transform .2s;box-shadow:var(--shadow)}
  .rail .rail-foot{display:block}
  .nav{flex-direction:column;flex-wrap:nowrap}
  body.nav-open .rail{transform:none}
  body.nav-open .rail-scrim{display:block;position:fixed;inset:0;z-index:35;background:rgba(10,14,12,.4)}
}
@media (prefers-reduced-motion:reduce){.rail,.nav .nav-head .chev{transition:none}}
/* "review" badge on menu items of pages that are not live yet (Settings › Page releases) */
.nav .sub .pill{margin-left:auto;font-size:10px;padding:1px 6px;line-height:1.4}

/* "a new version is available" (core/api.js) */
.update-bar{position:sticky;top:0;z-index:60;display:flex;gap:12px;align-items:center;justify-content:center;padding:8px 16px;background:var(--accent-soft);color:var(--ink);font-size:13px;border-bottom:1px solid var(--line)}