:root {
  --portal-bg: #f4f1ea;
  --portal-paper: #ffffff;
  --portal-ink: #1f2937;
  --portal-muted: #6b7280;
  --portal-accent: #1d4ed8;
  --portal-accent-soft: #dbeafe;
  --portal-sidebar: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
  --portal-border: #e5e7eb;
}

body.portal-body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(59, 130, 246, 0.12), transparent 35%),
    linear-gradient(180deg, #f8f5ef 0%, #f4f1ea 100%);
  color: var(--portal-ink);
}

.portal-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.portal-sidebar {
  background: var(--portal-sidebar);
  color: white;
  padding: 1.5rem;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-brand {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  margin-bottom: 2rem;
}

.sidebar-section {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.55);
  margin: 1.25rem 0 0.75rem;
}

.sidebar-link {
  display: block;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 0.65rem 0.9rem;
  border-radius: 0.85rem;
  margin-bottom: 0.35rem;
}

.sidebar-link:hover,
.sidebar-link.active {
  background: rgba(255, 255, 255, 0.12);
  color: white;
}

.portal-main {
  padding: 1.5rem 2rem 2rem;
}

.portal-navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-card {
  background: var(--portal-paper);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 1rem;
  padding: 1.1rem 1.2rem;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.06);
}

.metric-card span {
  display: block;
  color: var(--portal-muted);
  font-size: 0.9rem;
}

.metric-card strong {
  display: block;
  font-size: 1.85rem;
  margin-top: 0.35rem;
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.login-panel {
  width: min(980px, 100%);
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.preview-scroll {
  max-height: 320px;
  overflow: auto;
}

@media (max-width: 992px) {
  .portal-shell {
    grid-template-columns: 1fr;
  }

  .portal-sidebar {
    position: static;
    height: auto;
  }

  .portal-main {
    padding: 1rem;
  }

  .portal-navbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .login-panel {
    grid-template-columns: 1fr;
  }
}