:root {
    color-scheme: light;

    /* Brand colors: update this block to rebrand every Yaskadox surface. */
    --color-primary: #155eef;
    --color-primary-hover: #004eeb;
    --color-secondary: #087e8b;
    --color-background: #f6f8fb;
    --color-surface: #ffffff;
    --color-surface-alt: #eef3f8;
    --color-border: #d6dee9;
    --color-text: #14213d;
    --color-text-muted: #5f6c80;
    --color-success: #15803d;
    --color-warning: #a85b00;
    --color-danger: #b42318;

    /* Supporting, accessible color roles. */
    --color-primary-soft: #eaf1ff;
    --color-primary-strong: #0b3a9f;
    --color-secondary-soft: #e7f6f7;
    --color-secondary-strong: #075f68;
    --color-success-soft: #eaf7ee;
    --color-success-strong: #11662f;
    --color-warning-soft: #fff4dd;
    --color-warning-strong: #7a4100;
    --color-danger-soft: #fdefed;
    --color-danger-strong: #8d1b13;
    --color-info-soft: #eaf1ff;
    --color-info-strong: #174ea6;
    --color-disabled: #a6b0bf;
    --color-disabled-surface: #edf1f5;
    --color-overlay: rgb(12 24 46 / 62%);
    --color-focus: #155eef;
    --color-on-primary: #ffffff;
    --color-on-secondary: #ffffff;

    /* System typography keeps the product fast and vendor-neutral. */
    --font-family-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-family-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: clamp(1.5rem, 1.32rem + 0.8vw, 2rem);
    --font-size-3xl: clamp(1.875rem, 1.54rem + 1.5vw, 2.75rem);
    --font-size-4xl: clamp(2.25rem, 1.7rem + 2.35vw, 3.75rem);
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.15;
    --line-height-heading: 1.25;
    --line-height-body: 1.6;
    --letter-spacing-tight: -0.025em;
    --letter-spacing-wide: 0.04em;

    /* Four-pixel spacing scale. */
    --space-0: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-7: 1.75rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.625rem;
    --radius-lg: 0.875rem;
    --radius-xl: 1.25rem;
    --radius-pill: 999px;

    --border-width: 1px;
    --shadow-xs: 0 1px 2px rgb(20 33 61 / 5%);
    --shadow-sm: 0 2px 8px rgb(20 33 61 / 8%);
    --shadow-md: 0 12px 30px rgb(20 33 61 / 11%);
    --shadow-lg: 0 24px 56px rgb(20 33 61 / 16%);
    --focus-ring: 0 0 0 3px rgb(21 94 239 / 28%);

    --control-height-sm: 2.25rem;
    --control-height-md: 2.75rem;
    --control-height-lg: 3.25rem;
    --header-height: 4.25rem;
    --sidebar-width: 17rem;
    --content-max-width: 80rem;
    --content-wide-max-width: 96rem;
    --text-max-width: 44rem;

    --transition-fast: 140ms ease;
    --transition-base: 220ms ease;

    --z-dropdown: 40;
    --z-sticky: 50;
    --z-modal: 80;
    --z-toast: 90;
}