:root {
  --brand-dark: #1e293b;
  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-primary-light: #dbeafe;
  --brand-primary-text: #1e40af;
  --brand-accent: #0891b2;
  --brand-accent-hover: #0e7490;

  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --bg-body: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-header: #1e293b;

  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;

  --success: #16a34a;
  --success-light: #dcfce7;
  --success-text: #166534;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --warning-text: #92400e;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --danger-text: #991b1b;
  --info: #2563eb;
  --info-light: #dbeafe;
  --info-text: #1e40af;

  --color-instruction: #dbeafe;
  --color-instruction-text: #1e40af;
  --color-condition: #fef3c7;
  --color-condition-text: #92400e;
  --color-timer: #dcfce7;
  --color-timer-text: #166534;
  --color-calculation: #e0e7ff;
  --color-calculation-text: #3730a3;
  --color-thermal: #fce7f3;
  --color-thermal-text: #9d174d;
  --color-checkpoint: #f3e8ff;
  --color-checkpoint-text: #6b21a8;
  --color-measurement: #ccfbf1;
  --color-measurement-text: #115e59;
  --color-equimolar: #fef9c3;
  --color-equimolar-text: #854d0e;
  --color-equimass: #fbcfe8;
  --color-equimass-text: #9d174d;

  --radius: 8px;
  --radius-sm: 4px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.12);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", "Consolas", monospace;

  --header-height: 64px;
  --max-width: 1200px;
}