:root {
  --navy-950: #0f172a;
  --navy-900: #1e293b;
  --navy-850: #334155;
  --navy-800: #475569;
  --navy-700: #64748b;
  --navy-600: #94a3b8;
  --navy-500: #cbd5e1;
  --navy-400: #e2e8f0;
  --navy-300: #f1f5f9;
  --navy-200: #f8fafc;
  --navy-100: #f1f5f9;
  --navy-50:  #f8fafc;
  --navy-20:  #ffffff;

  --c-text-primary:   #0f172a;
  --c-text-secondary: #334155;
  --c-text-muted:     #64748b;
  --c-border:         #e2e8f0;
  --c-border-subtle:  #f1f5f9;
  --c-bg:             #ffffff;
  --c-white:          #ffffff;

  --radius-xs: 3px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: none;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  background: #ffffff;
  color: var(--c-text-primary);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* TOP GLOBAL NAV (Clean White Flat) */
.top-nav {
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.brand-group {
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-title {
  color: #0f172a;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* UID & GRADE PILLS */
.uid-badge {
  display: inline-block;
  font-size: 10.5px;
  font-weight: 500;
  font-family: 'SF Mono', 'Consolas', monospace;
  background: #f1f5f9;
  color: #334155;
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  border: 1px solid #e2e8f0;
  white-space: nowrap;
  flex-shrink: 0;
}
.grade-pill {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}
.grade-pill.clean { background: #f8fafc; color: #475569; border: 1px solid #e2e8f0; }
.grade-pill.mid { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.grade-pill.high { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.grade-pill.critical { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }