/* =============================================================================
 *  Shared "shell" for the Sixteen : Three Command Center site.
 *  Loaded on every page AFTER that page's own <style>, so these rules win.
 *  It uses the page's own design tokens (--surface, --ink, --hud, --line,
 *  --mono, --accent, --plane) so the tab bar + login gate automatically match
 *  whichever tab you're on.
 * ========================================================================== */

/* ---- global tab strip (site header, above each page's own bar) ---- */
.s3-tabs{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:9px 20px;background:var(--brand,#16324F);
  border-bottom:1px solid var(--line-2,rgba(0,0,0,.2));
  font-family:var(--mono,ui-monospace,Consolas,monospace);
}
.s3-tabs .s3-brand{display:flex;align-items:center;gap:9px;margin-right:6px;text-decoration:none}
.s3-tabs .s3-seal{width:24px;height:24px;flex:none}
.s3-tabs .s3-word{font-family:var(--mono);font-weight:700;letter-spacing:.14em;font-size:12px;
  color:#fff;white-space:nowrap}
.s3-tabs .s3-word b{color:var(--accent-soft,var(--accent,#d8ae70))}
.s3-tablist{display:flex;gap:3px;flex-wrap:wrap;align-items:center}
.s3-tab{font-family:var(--mono);font-size:12px;line-height:1;text-decoration:none;
  color:rgba(255,255,255,.72);padding:7px 11px;border-radius:7px;transition:.15s;white-space:nowrap;
  border:1px solid transparent}
.s3-tab:hover{color:#fff;background:rgba(255,255,255,.10)}
.s3-tab.on{color:#fff;background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.22)}
.s3-tab .ext{opacity:.6;font-size:10px}
.s3-spacer{margin-left:auto}
.s3-who{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;color:rgba(255,255,255,.8)}
.s3-who .role{font-size:9px;letter-spacing:.06em;text-transform:uppercase;padding:2px 7px;border-radius:999px;
  background:rgba(255,255,255,.14);color:#fff}
.s3-who .out{background:none;border:none;color:rgba(255,255,255,.6);cursor:pointer;font-family:var(--mono);
  font-size:11px;text-decoration:underline;padding:2px}
.s3-who .out:hover{color:#fff}
.s3-mode{font-family:var(--mono);font-size:10px;letter-spacing:.04em;color:#fff;
  background:rgba(255,255,255,.14);border-radius:6px;padding:2px 8px}
@media (max-width:720px){ .s3-tabs{gap:8px;padding:8px 12px} .s3-word{display:none} }

/* ---- login gate (shared, sign-in only) ---- */
.s3-gate{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:24px;
  background:color-mix(in srgb,var(--plane,#0b1a29) 92%,#0b1a29);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.s3-gate[hidden]{display:none}
.s3-gate-card{width:100%;max-width:400px;background:var(--surface,#14293E);border:1px solid var(--line,rgba(255,255,255,.14));
  border-radius:var(--radius,12px);box-shadow:var(--shadow,0 12px 34px rgba(0,0,0,.4));padding:30px 26px;text-align:center}
.s3-gate-card .s3-seal{width:54px;height:54px;margin:0 auto 12px}
.s3-gate-card h1{font-family:var(--mono,monospace);font-size:15px;letter-spacing:.08em;color:var(--ink,#e6eef8);margin:0 0 3px}
.s3-gate-card .sub{font-family:var(--mono,monospace);font-size:9.5px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted,#8496a8);margin-bottom:22px}
.s3-gate form{display:flex;flex-direction:column;gap:10px;text-align:left}
.s3-gate label{font-family:var(--mono,monospace);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted,#8496a8)}
.s3-gate input{font-family:var(--sans,system-ui,sans-serif);font-size:14px;color:var(--ink,#e6eef8);
  background:var(--inset,var(--surface-2,#10202f));border:1px solid var(--line,rgba(255,255,255,.14));border-radius:8px;padding:11px 12px}
.s3-gate .s3-btn{font-family:var(--mono,monospace);font-size:12.5px;font-weight:700;letter-spacing:.03em;cursor:pointer;border:none;
  border-radius:8px;padding:12px 16px;margin-top:4px;color:#fff;
  background:linear-gradient(150deg,var(--hud,#3E7C78),var(--brand-2,var(--hud-2,#2f6460)))}
.s3-gate .s3-btn:hover{filter:brightness(1.07)}
.s3-gate .s3-btn:disabled{opacity:.6;cursor:default}
.s3-gate .msg{font-family:var(--mono,monospace);font-size:11.5px;line-height:1.5;min-height:1.2em;margin-top:2px;color:var(--ink-2,#9db3cb)}
.s3-gate .msg.err{color:var(--crit,#ff5c56)} .s3-gate .msg.ok{color:var(--good,#2fe08a)}

/* role gating: hide write controls from viewers on any page */
body[data-role="viewer"] [data-requires="write"]{display:none!important}