:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-hover: #1d4ed8;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-heading: #475569;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-warning: #d97706;
  --color-bg-hover: #f1f5f9;
  --color-bg-subtle: #f8fafc;
  --color-focus-ring: rgba(37, 99, 235, 0.15);
  --color-danger-light: #fef2f2;
  --color-danger-focus: rgba(239, 68, 68, 0.15);
  --color-success-light: #f0fdf4;
  --color-warning-light: #fffbeb;
  --color-primary-subtle: #eff6ff;
  --color-primary-border: #bfdbfe;
  --shadow-knob: 0 1px 3px rgba(0, 0, 0, 0.15);

  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: 150ms ease;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
}

[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-primary: #3b82f6;
  --color-primary-light: #60a5fa;
  --color-primary-hover: #2563eb;
  --color-text: #e2e8f0;
  --color-text-secondary: #94a3b8;
  --color-text-heading: #cbd5e1;
  --color-text-muted: #64748b;
  --color-border: #334155;
  --color-success: #22c55e;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --color-bg-hover: #334155;
  --color-bg-subtle: #1e293b;
  --color-focus-ring: rgba(59, 130, 246, 0.25);
  --color-danger-light: #3b1c1c;
  --color-danger-focus: rgba(239, 68, 68, 0.25);
  --color-success-light: #1a2e1a;
  --color-warning-light: #2e2a1a;
  --color-primary-subtle: #1e3a5f;
  --color-primary-border: #1d4ed8;
  --shadow-knob: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.3);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scrollbar-gutter: stable;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow);
}

.app-header h1 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
}

main {
  padding: var(--space-lg);
  max-width: 1400px;
  margin: 0 auto;
}

/* --- Print styles --- */
@media print {
  .app-header {
    box-shadow: none;
    border-bottom: 2px solid #000;
  }

  body {
    background: #fff;
    color: #1e293b;
  }

  report-filter,
  report-export {
    display: none !important;
  }

  main {
    padding: 0;
    max-width: 100%;
  }
}