:root {
  --color-bg-app: #f4f6fb;
  --color-bg-canvas: #ffffff;
  --color-bg-subtle: #f8fafc;
  --color-bg-muted: #eef2f7;
  --color-bg-emphasis: #e7eef9;
  --color-bg-sidebar: #0f172a;
  --color-bg-sidebar-hover: #162132;
  --color-bg-sidebar-active: #1e293b;

  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-text-subtle: #94a3b8;
  --color-text-inverse: #f8fafc;

  --color-border-subtle: #e2e8f0;
  --color-border-default: #cbd5e1;
  --color-border-strong: #94a3b8;
  --color-border-focus: #2563eb;

  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-soft: rgba(37, 99, 235, 0.12);
  --color-accent-soft-strong: rgba(37, 99, 235, 0.18);
  --color-accent-text: #1d4ed8;

  --color-success: #16a34a;
  --color-success-soft: rgba(22, 163, 74, 0.12);
  --color-warning: #d97706;
  --color-warning-soft: rgba(245, 158, 11, 0.14);
  --color-danger: #dc2626;
  --color-danger-soft: rgba(220, 38, 38, 0.12);
  --color-info: #0891b2;
  --color-info-soft: rgba(8, 145, 178, 0.12);

  --color-fire: #dc2626;
  --color-fire-soft: #fef2f2;
  --color-fire-text: #991b1b;
  --color-hot: #ea580c;
  --color-hot-soft: #fff7ed;
  --color-hot-text: #9a3412;
  --color-warm: #ca8a04;
  --color-warm-soft: #fefce8;
  --color-warm-text: #854d0e;
  --color-cool: #0284c7;
  --color-cool-soft: #eff6ff;
  --color-cool-text: #1e40af;
  --color-cold: #64748b;
  --color-cold-soft: #f1f5f9;
  --color-cold-text: #334155;

  --font-family-sans: "Geist", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-family-mono: "JetBrains Mono", ui-monospace, monospace;

  --font-size-2xs: 11px;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 22px;
  --font-size-2xl: 28px;
  --font-size-3xl: 40px;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 800;

  --line-height-tight: 1.2;
  --line-height-base: 1.45;
  --line-height-relaxed: 1.6;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 999px;

  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.03);
  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 18px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 18px 34px rgba(15, 23, 42, 0.12);
  --shadow-modal: 0 24px 52px rgba(15, 23, 42, 0.18);

  --transition-fast: 120ms ease-out;
  --transition-base: 160ms ease-out;
  --transition-slow: 220ms ease-out;
}

[data-theme="dark"] {
  --color-bg-app: #07090d;
  --color-bg-canvas: #0d1117;
  --color-bg-subtle: #10161f;
  --color-bg-muted: #161d27;
  --color-bg-emphasis: #1b2533;

  --color-text-primary: #f0f3f6;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-subtle: #64748b;
  --color-text-inverse: #0d1117;

  --color-border-subtle: #1f2937;
  --color-border-default: #334155;
  --color-border-strong: #475569;

  --color-accent-soft: rgba(59, 130, 246, 0.18);
  --color-accent-soft-strong: rgba(59, 130, 246, 0.24);
  --color-accent-text: #93c5fd;

  --color-success-soft: rgba(22, 163, 74, 0.16);
  --color-warning-soft: rgba(245, 158, 11, 0.18);
  --color-danger-soft: rgba(220, 38, 38, 0.18);
  --color-info-soft: rgba(8, 145, 178, 0.18);

  --color-fire-soft: rgba(220, 38, 38, 0.12);
  --color-fire-text: #fca5a5;
  --color-hot-soft: rgba(234, 88, 12, 0.12);
  --color-hot-text: #fdba74;
  --color-warm-soft: rgba(202, 138, 4, 0.12);
  --color-warm-text: #fcd34d;
  --color-cool-soft: rgba(2, 132, 199, 0.12);
  --color-cool-text: #7dd3fc;
  --color-cold-soft: rgba(100, 116, 139, 0.14);
  --color-cold-text: #cbd5e1;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.32);
  --shadow-sm: 0 3px 8px rgba(0, 0, 0, 0.36);
  --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.42);
  --shadow-lg: 0 20px 44px rgba(0, 0, 0, 0.55);
  --shadow-modal: 0 28px 64px rgba(0, 0, 0, 0.6);
}

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-md { font-size: var(--font-size-md); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.mono { font-family: var(--font-family-mono); font-variant-numeric: tabular-nums; }

.surface-primary,
.surface-secondary,
.surface-warning,
.surface-danger,
.surface-accent {
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}

.surface-primary {
  background: var(--color-bg-canvas);
  border: 1px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
}

.surface-secondary {
  background: var(--color-bg-subtle);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.surface-warning {
  background: var(--color-warning-soft);
  border: 1px solid rgba(245, 158, 11, 0.24);
}

.surface-danger {
  background: var(--color-danger-soft);
  border: 1px solid rgba(220, 38, 38, 0.24);
}

.surface-accent {
  background: linear-gradient(180deg, var(--color-bg-canvas) 0%, var(--color-accent-soft) 100%);
  border: 1px solid rgba(37, 99, 235, 0.18);
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.section-heading h3,
.section-heading h4,
.section-heading .heading-title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
}

.empty-state {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-6);
  border: 1px dashed var(--color-border-default);
  border-radius: var(--radius-lg);
  background: var(--color-bg-subtle);
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
}

.empty-state-copy {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

.view-loading {
  display: grid;
  gap: var(--space-4);
}

.skeleton-card,
.skeleton-line {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-muted);
}

.skeleton-card::after,
.skeleton-line::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.45), transparent);
  animation: skeletonShimmer 1.4s infinite;
}

.skeleton-card {
  min-height: 120px;
  border-radius: var(--radius-lg);
}

.skeleton-line {
  height: 14px;
  border-radius: var(--radius-full);
}

@keyframes skeletonShimmer {
  100% { transform: translateX(100%); }
}

.timeline {
  position: relative;
  display: grid;
  gap: var(--space-3);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--color-border-subtle);
}

.timeline-event {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
}

.timeline-event-dot {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-full);
  background: var(--color-bg-canvas);
  border: 2px solid var(--color-border-default);
  display: grid;
  place-items: center;
  z-index: 1;
  font-size: 11px;
}

.timeline-event.positive .timeline-event-dot {
  border-color: rgba(22, 163, 74, 0.35);
  color: var(--color-success);
}

.timeline-event.negative .timeline-event-dot {
  border-color: rgba(220, 38, 38, 0.35);
  color: var(--color-danger);
}

.timeline-event.warning .timeline-event-dot {
  border-color: rgba(245, 158, 11, 0.35);
  color: var(--color-warning);
}

.timeline-event-card {
  background: var(--color-bg-subtle);
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  display: grid;
  gap: var(--space-1);
}

.timeline-event-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.timeline-event-time {
  color: var(--color-text-muted);
  font-size: var(--font-size-2xs);
}

.metric-grid {
  display: grid;
  gap: var(--space-3);
}

.metric-grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.metric-card {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-bg-canvas);
  border: 1px solid rgba(148, 163, 184, 0.14);
  box-shadow: var(--shadow-sm);
}

.metric-card.secondary {
  background: var(--color-bg-subtle);
  border-color: rgba(148, 163, 184, 0.1);
  box-shadow: none;
}

.metric-label {
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.metric-value {
  margin-top: var(--space-2);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-black);
  letter-spacing: -0.04em;
  line-height: 1;
}

.metric-value.hero {
  font-size: var(--font-size-3xl);
}

.metric-note {
  margin-top: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--font-size-xs);
}

.operator-callout {
  border-left: 3px solid var(--color-accent);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  background: var(--color-bg-subtle);
}

.ai-brief-layout {
  display: grid;
  gap: var(--space-3);
}

.ai-brief-block {
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-bg-subtle);
  border: 1px solid rgba(148, 163, 184, 0.12);
}

.ai-brief-block.warning {
  background: var(--color-warning-soft);
  border-color: rgba(245, 158, 11, 0.24);
}

.ai-brief-title {
  margin: 0 0 var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.toast {
  background: var(--color-bg-canvas);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
  padding: var(--space-3) var(--space-4);
  display: grid;
  gap: var(--space-1);
}

.toast.success { border-color: rgba(22, 163, 74, 0.28); background: var(--color-success-soft); }
.toast.warning { border-color: rgba(245, 158, 11, 0.28); background: var(--color-warning-soft); }
.toast.danger { border-color: rgba(220, 38, 38, 0.28); background: var(--color-danger-soft); }
.toast.info { border-color: rgba(37, 99, 235, 0.28); background: var(--color-accent-soft); }

.shortcut-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.56);
  display: grid;
  place-items: center;
  padding: var(--space-4);
  z-index: 1500;
}

.shortcut-sheet {
  width: min(560px, 100%);
  background: var(--color-bg-canvas);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-modal);
  padding: var(--space-5);
  display: grid;
  gap: var(--space-4);
}

.shortcut-list {
  display: grid;
  gap: var(--space-2);
}

.shortcut-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 1px solid rgba(148, 163, 184, 0.14);
}

.shortcut-row:last-child { border-bottom: 0; }

.shortcut-key {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 4px 8px;
}

@media (max-width: 767px) {
  .metric-grid.four {
    grid-template-columns: 1fr 1fr;
  }

  .shortcut-sheet {
    padding: var(--space-4);
  }
}