/* =====================================================================
   NEXUS · Shell — topbar, breadcrumbs, avatar dropdown
   ===================================================================== */

.nx-topbar {
  position: sticky; top: 0; z-index: 30;
  height: var(--topbar-h);
  display: flex; align-items: center;
  padding: 0 20px;
  background: var(--nx-ink-950);
  color: #FFF;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  gap: 20px;
}
.nx-topbar .brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none;
  color: inherit;
}
.nx-topbar .brand .mark {
  width: 30px; height: 30px; border-radius: 6px;
  background: linear-gradient(135deg, var(--nx-teal-500), var(--nx-teal-800));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-weight: var(--fw-black);
  font-size: 15px;
}
.nx-topbar .brand .txt {
  line-height: 1.1;
  font-family: var(--font-mono);
}
.nx-topbar .brand .n1 { font-size: 13px; font-weight: var(--fw-black); letter-spacing: 0.14em; }
.nx-topbar .brand .n2 { font-size: 9px; opacity: 0.5; letter-spacing: 0.14em; }

.nx-topbar .crumbs {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.nx-topbar .crumbs a { color: rgba(255,255,255,0.75); text-decoration: none; }
.nx-topbar .crumbs a:hover { color: #FFF; text-decoration: none; }
.nx-topbar .crumbs .sep { color: rgba(255,255,255,0.3); }
.nx-topbar .crumbs .cur { color: #FFF; font-weight: var(--fw-semi); }

.nx-topbar nav.primary {
  margin-left: auto;
  display: flex; align-items: center;
  gap: 22px;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  scroll-snap-type: x proximity;
}
.nx-topbar nav.primary::-webkit-scrollbar { display: none; }
.nx-topbar nav.primary a {
  color: rgba(255,255,255,0.65);
  font-size: 13px;
  text-decoration: none;
  font-weight: var(--fw-med);
  white-space: nowrap;
  scroll-snap-align: start;
  flex-shrink: 0;
}
.nx-topbar nav.primary a:hover, .nx-topbar nav.primary a.is-current { color: #FFF; }
.nx-topbar nav.primary a.is-current { color: var(--nx-teal-300); }

@media (max-width: 1400px) {
  .nx-topbar nav.primary { gap: 16px; }
  .nx-topbar nav.primary a { font-size: 12px; }
}
@media (max-width: 1180px) {
  .nx-topbar nav.primary { gap: 12px; }
  .nx-topbar nav.primary a { font-size: 11.5px; }
}

.nx-topbar .util {
  display: flex; align-items: center; gap: 12px;
  margin-left: 16px;
}
.nx-topbar .util .status {
  padding: 3px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--fw-black);
  letter-spacing: 0.1em;
}
.nx-topbar .util .status.normal   { background: rgba(16, 185, 129, 0.14); color: #6EE7B7; }
.nx-topbar .util .status.watch    { background: rgba(251, 191, 36, 0.14); color: var(--nx-amber-400); }
.nx-topbar .util .status.elevated { background: rgba(249, 115, 22, 0.14); color: #FDBA74; }
.nx-topbar .util .status.critical { background: rgba(239, 68, 68, 0.14); color: #FCA5A5; }

.scope-banner {
  display: flex; align-items: center; gap: 14px;
  padding: 8px 20px;
  background: linear-gradient(90deg, rgba(147, 51, 234, 0.15), rgba(6, 182, 212, 0.10));
  border-bottom: 1px solid rgba(147, 51, 234, 0.25);
  color: #FFF;
}
.scope-banner .pill {
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(147, 51, 234, 0.25);
  color: #DDD6FE;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: var(--fw-black);
  letter-spacing: 0.14em;
  border: 1px solid rgba(147, 51, 234, 0.35);
  flex-shrink: 0;
}
.scope-banner .msg {
  font-size: 12px;
  color: rgba(255,255,255,0.85);
  line-height: 1.45;
  flex: 1;
}
.scope-banner .try-cs {
  padding: 5px 12px;
  background: rgba(6, 182, 212, 0.18);
  border: 1px solid rgba(6, 182, 212, 0.35);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--fw-black);
  letter-spacing: 0.06em;
  color: #67E8F9;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 150ms ease;
}
.scope-banner .try-cs:hover {
  background: rgba(6, 182, 212, 0.3);
}
@media (max-width: 800px) {
  .scope-banner { padding: 6px 10px; gap: 8px; }
  .scope-banner .msg { font-size: 11px; }
  .scope-banner .try-cs { padding: 4px 8px; font-size: 10px; }
}

.nx-topbar .util .demo-badge {
  padding: 3px 8px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: var(--fw-black);
  letter-spacing: 0.18em;
  background: rgba(147, 51, 234, 0.18);
  color: #DDD6FE;
  border: 1px solid rgba(147, 51, 234, 0.3);
  cursor: help;
}

.nx-topbar .avatar-drop .demo-switch {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--stroke-1);
}
.nx-topbar .avatar-drop .demo-switch .lbl {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--nx-ink-500);
  font-weight: var(--fw-black);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.nx-topbar .avatar-drop .demo-switch .btns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}
.nx-topbar .avatar-drop .demo-switch button {
  padding: 8px 4px;
  background: var(--surface-2);
  border: 1px solid var(--stroke-1);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--fw-black);
  color: var(--nx-ink-700);
  cursor: pointer;
  transition: all 150ms ease;
}
.nx-topbar .avatar-drop .demo-switch button:hover {
  background: var(--nx-ink-300);
  color: var(--nx-ink-900);
}
.nx-topbar .avatar-drop .demo-switch button.on {
  background: var(--nx-teal-500);
  color: #032530;
  border-color: var(--nx-teal-500);
}

.nx-topbar .avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--nx-teal-500), var(--nx-teal-800));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-weight: var(--fw-black);
  font-size: 12px;
  color: #FFF;
  cursor: pointer;
  position: relative;
}
.nx-topbar .avatar-drop {
  position: absolute; top: calc(var(--topbar-h) + 8px); right: 20px;
  width: 280px;
  background: var(--surface-0);
  color: var(--ink-1);
  border-radius: 12px;
  box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.24);
  padding: 16px;
  z-index: 40;
  display: none;
}
.nx-topbar .avatar-drop.open { display: block; }
.nx-topbar .avatar-drop .name { font-weight: var(--fw-bold); font-size: 15px; }
.nx-topbar .avatar-drop .role { font-size: 12px; color: var(--nx-ink-500); font-family: var(--font-mono); margin-top: 2px; }
.nx-topbar .avatar-drop .scope { font-size: 11px; color: var(--nx-teal-700); margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--stroke-1); font-family: var(--font-mono); }
.nx-topbar .avatar-drop .signout {
  margin-top: 14px;
  width: 100%;
  padding: 10px;
  background: var(--surface-2);
  border-radius: 8px;
  font-weight: var(--fw-semi);
  font-size: 13px;
  color: var(--nx-ink-700);
  cursor: pointer;
}
.nx-topbar .avatar-drop .signout:hover { background: var(--nx-ink-300); }

@media (max-width: 800px) {
  .nx-topbar { padding: 0 12px; gap: 10px; }
  .nx-topbar .brand .txt { display: none; }
  .nx-topbar .crumbs { max-width: 40vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .nx-topbar .crumbs .home-crumb { display: none; }
  .nx-topbar .crumbs .sep:first-of-type { display: none; }
  .nx-topbar nav.primary { gap: 10px; }
  .nx-topbar nav.primary a { font-size: 11px; }
  .nx-topbar .util { margin-left: 8px; }
  .nx-topbar .util .status { display: none; }
}