header.app-header {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 80;
  width: 224px;
  height: 100vh;
  padding: 26px 18px 18px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  background: rgba(13, 16, 14, .96);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(18px);
}

header.app-header h1 {
  display: flex;
  align-items: center;
  gap: 11px;
  margin: 0 8px 34px;
  color: var(--foreground);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.02em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: #0b0d0b;
  background: var(--accent);
  border-radius: 3px 11px 3px 3px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 900;
}

.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy span { margin-top: 5px; color: var(--muted-dark); font-family: var(--mono); font-size: 9px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; }

.tabs {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin: 0;
  height: auto;
}

.tabs::before {
  content: "Workspace";
  margin: 0 10px 10px;
  color: #5d655b;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.tabs a {
  position: relative;
  height: 40px;
  padding: 0 11px;
  display: flex;
  align-items: center;
  color: #899087;
  border: 1px solid transparent;
  border-radius: 5px;
  text-decoration: none;
  font-size: 12px;
  font-weight: 600;
  transition: color 140ms, background 140ms, border-color 140ms;
}

.tabs a:hover { color: var(--foreground); background: #151915; }
.tabs a.active { color: var(--foreground); background: #1a1f1a; border-color: #293129; }
.tabs a.active::after { content: ""; position: absolute; right: 10px; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px rgba(223,255,79,.6); }

.rail-status {
  margin-top: auto;
  padding: 13px 12px;
  background: #101310;
  border: 1px solid var(--border-light);
  border-radius: 6px;
}

.rail-status-label { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 11px; font-weight: 600; }
.rail-status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--warning); box-shadow: 0 0 10px rgba(243,201,105,.35); }
.rail-status-dot.live { background: var(--positive); box-shadow: 0 0 10px rgba(142,230,168,.4); }
.rail-status-meta { margin-top: 7px; color: #5e665d; font-family: var(--mono); font-size: 9px; text-transform: uppercase; letter-spacing: .08em; }

.subnav {
  min-height: 48px;
  padding: 0 32px;
  display: flex;
  align-items: stretch;
  gap: 22px;
  background: rgba(9,11,10,.88);
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(14px);
}

.subnav a {
  display: flex;
  align-items: center;
  color: var(--muted-dark);
  border-bottom: 1px solid transparent;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.subnav a:hover { color: var(--foreground); }
.subnav a.active { color: var(--accent); border-bottom-color: var(--accent); }

.stats-bar, #intel-stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  background: #0c0f0d;
  border-bottom: 1px solid var(--border-light);
}

.stat, #intel-stats-row .intel-stat-card {
  min-width: 0;
  padding: 20px 26px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--border-light);
  border-radius: 0;
}

.stat:last-child, #intel-stats-row .intel-stat-card:last-child { border-right: 0; }
.stat .label, #intel-stats-row .label { color: var(--muted-dark); font-family: var(--mono); font-size: 9px; font-weight: 650; letter-spacing: .11em; text-transform: uppercase; }
.stat .value, #intel-stats-row .value { color: var(--foreground); font-size: 25px; font-weight: 630; letter-spacing: -.045em; line-height: 1; }

.content { width: min(1480px, 100%); margin: 0 auto; padding: 32px; }

.filters {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  padding: 13px;
  align-items: flex-end;
  flex-wrap: wrap;
  background: rgba(17,20,17,.72);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.filters label { display: flex; flex-direction: column; gap: 6px; color: var(--muted-dark); font-family: var(--mono); font-size: 9px; font-weight: 650; letter-spacing: .09em; text-transform: uppercase; }
.section-heading { margin-bottom: 12px; color: var(--muted-dark); font-family: var(--mono); font-size: 10px; font-weight: 650; letter-spacing: .11em; text-transform: uppercase; }

@media (max-width: 820px) {
  header.app-header { inset: 0 0 auto 0; width: 100%; height: 68px; padding: 12px 16px; flex-direction: row; align-items: center; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--border); }
  header.app-header h1 { margin: 0 10px 0 0; flex: 0 0 auto; }
  .brand-copy span, .tabs::before, .rail-status { display: none; }
  .tabs { flex-direction: row; gap: 2px; }
  .tabs a { height: 38px; padding: 0 10px; white-space: nowrap; }
  .tabs a.active::after { display: none; }
  .subnav { padding: 0 18px; overflow-x: auto; }
  .content { padding: 20px 16px 32px; }
  .stats-bar, #intel-stats-row { grid-template-columns: repeat(2, 1fr); }
  .stat, #intel-stats-row .intel-stat-card { padding: 16px; }
}