header {
  padding: 10px 28px; border-bottom: 1px solid var(--border);
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center; gap: 10px; flex-shrink: 0;
  background: var(--surface);
}

.h-left  { display: flex; align-items: center }
.h-center { display: flex; justify-content: center; align-items: center }
.h-right { display: flex; align-items: center; gap: 8px; justify-content: flex-end }

.ms-logo {
  height: 34px; width: auto;
  filter: brightness(0) invert(1);
  opacity: .9;
}
:root.light .ms-logo { filter: none; opacity: 1 }

h1 {
  font-family: 'Outfit', sans-serif; font-weight: 700;
  font-size: 1.25rem; letter-spacing: .01em; color: var(--accent);
  white-space: nowrap;
}
h1 em { color: var(--muted); font-style: normal; font-weight: 300; margin: 0 1px }

.tag {
  font-size: .57rem; color: var(--muted);
  border: 1px solid var(--border); padding: 2px 8px;
  border-radius: 100px; letter-spacing: .08em;
}

.sdot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--muted); transition: background .3s, box-shadow .3s; flex-shrink: 0;
}
.sdot.ok  { background: var(--valid); box-shadow: 0 0 6px var(--valid) }
.sdot.err { background: var(--error); box-shadow: 0 0 6px var(--error) }
.sdot.chk { background: var(--warn); animation: pulse 1s infinite }

.srv-btn {
  display: flex; align-items: center; gap: 8px;
  font-size: .64rem; padding: 5px 11px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--s2);
  cursor: pointer; transition: border-color .2s;
}
.srv-btn:hover { border-color: var(--accent) }

/* ── Sidebar ──────────────────────────────────────────────────── */
.sidebar {
  width: 260px; flex-shrink: 0;
  background: var(--surface); border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden; transition: width .22s ease;
}
.sidebar.collapsed { width: 56px; }

.side-nav {
  flex: 1; display: flex; flex-direction: column;
  padding: 10px 8px; gap: 3px;
  overflow-y: auto; overflow-x: hidden;
}

.tab-btn {
  width: 100%; display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: 7px;
  border: none; background: transparent; color: var(--muted);
  font-family: 'DM Mono', monospace; font-size: .6rem;
  letter-spacing: .06em; cursor: pointer;
  text-transform: uppercase; white-space: nowrap;
  text-align: left; transition: background .15s, color .15s;
}
.tab-btn:hover:not(.active) { background: var(--s2); color: var(--text); }
.tab-btn.active { background: var(--s2); color: var(--accent); }

.tab-icon {
  font-size: .85rem; flex-shrink: 0;
  width: 22px; text-align: center; line-height: 1;
}
.nav-label { overflow: hidden; white-space: nowrap; transition: opacity .18s; }
.sidebar.collapsed .nav-label { opacity: 0; pointer-events: none; }

.sidebar-toggle {
  border: none; background: none; cursor: pointer; width: 100%;
  color: var(--muted); padding: 12px 14px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px; flex-shrink: 0;
  font-family: 'DM Mono', monospace;
  font-size: .58rem; letter-spacing: .06em; text-transform: uppercase;
  transition: color .15s, background .15s;
}
.sidebar-toggle:hover { color: var(--text); background: var(--s2); }
.toggle-icon { font-size: .6rem; transition: transform .22s; flex-shrink: 0; }
.sidebar.collapsed .toggle-icon { transform: rotate(180deg); }
.sidebar.collapsed .tab-btn { justify-content: center; padding: 10px 0; }
.sidebar.collapsed .sidebar-toggle { justify-content: center; padding: 12px 0; }

.tab-close {
  display: inline-flex; align-items: center; justify-content: center;
  width: 15px; height: 15px; border-radius: 50%;
  font-size: .68rem; color: var(--muted);
  background: var(--s2); border: none; cursor: pointer;
  transition: background .15s, color .15s;
}
.tab-close:hover { background: var(--error); color: #fff }