:root {
    /* Omnia Uno aligned palette */
    --color-primary: #475569;
    --color-primary-rgb: 71, 85, 105;
    --color-primary-dark: #334155;
    --color-secondary: #334155;
    --color-accent: var(--color-primary);

    --color-text-dark: #1e293b;
    --color-text-light: #64748b;
    --color-text-white: #ffffff;

    --color-bg-light: #f8fafc;
    --color-white: #ffffff;

    --color-border: #e2e8f0;
    --color-border-soft: #dbeafe;
    --color-input-border: #cbd5e1;
    --color-surface-soft: #eff6ff;

    --color-success: #059669;
    --color-warning: #d97706;
    --color-error: #dc2626;

    --color-info-bg: #eff6ff;
    --color-info-border: #bfdbfe;
    --color-success-bg: #f0fdf4;
    --color-success-border: #86efac;
    --color-error-bg: #fef2f2;
    --color-error-border: #fca5a5;

    /* Typography */
    --font-family-base: Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;

    --line-height-tight: 1.2;
    --line-height-base: 1.4;

    /* Spacing */
    --space-0: 0;
    --space-xxs: 0.125rem;
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;

    /* Shadows and focus */
    --shadow-sm: 0 4px 10px rgba(71, 85, 105, 0.08);
    --focus-shadow: 0 0 0 3px rgba(71, 85, 105, 0.12);

    /* Component sizing */
    --layout-max-width: 900px;
    --day-label-width: 110px;
    --day-actions-min-width: 120px;
    --control-min-height: 26px;
    --checkbox-size: 16px;
}