:root {
    color-scheme: dark;

    /* Locked brand palette */
    --color-mint: #39ffb6;
    --color-cyan: #34d6ff;
    --color-warning: #ffd84d;
    --color-danger: #ff476f;
    --brand-gradient: linear-gradient(135deg, var(--color-mint) 0%, var(--color-cyan) 100%);

    /* Locked dark palette */
    --color-dark-background: #070a0d;
    --color-dark-surface: #0d1217;
    --color-dark-surface-elevated: #131a21;
    --color-dark-border: #202a32;
    --color-dark-text-primary: #f2f7f8;
    --color-dark-text-secondary: #85949e;

    /* Type */
    --font-display: "Manrope", sans-serif;
    --font-measurement: "Manrope", sans-serif;
    --font-body: "General Sans", sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: clamp(1.5rem, 1.35rem + 0.65vw, 2rem);
    --text-3xl: clamp(1.875rem, 1.6rem + 1.15vw, 2.75rem);
    --text-4xl: clamp(2.25rem, 1.8rem + 1.9vw, 3.75rem);
    --text-5xl: clamp(2.75rem, 2rem + 3.2vw, 5rem);
    --text-6xl: clamp(3.25rem, 2.1rem + 4.8vw, 6rem);
    --leading-none: 1;
    --leading-tight: 1.1;
    --leading-snug: 1.3;
    --leading-normal: 1.6;
    --tracking-tight: -0.03em;
    --tracking-ui: 0.01em;

    /* Shared content hierarchy */
    --type-h1-size: clamp(2.75rem, 4.4vw, 4.25rem);
    --type-h2-size: clamp(2.2rem, 3.2vw, 3.25rem);
    --type-h3-size: var(--text-2xl);
    --type-h4-size: var(--text-xl);
    --type-lead-size: var(--text-lg);
    --type-body-leading: var(--leading-normal);

    /* Locked 4px micro / 8px primary spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-30: 7.5rem;

    /* Layout */
    --container-max: 80rem;
    --container-tool: var(--container-max);
    --container-prose: var(--container-max);
    --page-gutter: max(2rem, env(safe-area-inset-left), env(safe-area-inset-right));
    --section-space: clamp(var(--space-12), 5vw, var(--space-20));
    --section-heading-gap: var(--space-4);
    --section-content-gap: var(--space-8);
    --faq-width: 100%;
    --card-radius: var(--radius-lg);
    --card-padding: clamp(1.25rem, 2.4vw, var(--space-8));
    --control-height: 2.75rem;
    --control-radius: var(--radius-md);
    --gold-box-border: color-mix(in srgb, var(--color-warning) 38%, var(--color-border));
    --gold-box-background: color-mix(in srgb, var(--color-warning) 7%, var(--color-surface));
    --gold-box-padding: var(--space-6);

    /* Locked radius scale */
    --radius-xs: 0.25rem;
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-pill: 9999px;

    /* Interaction and motion */
    --focus-ring-width: 2px;
    --focus-ring-offset: 3px;
    --duration-fast: 150ms;
    --duration-standard: 250ms;
    --duration-slow: 500ms;
    --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);

    /* Dark-only semantic aliases */
    --color-background: var(--color-dark-background);
    --color-surface: var(--color-dark-surface);
    --color-surface-elevated: var(--color-dark-surface-elevated);
    --color-border: var(--color-dark-border);
    --color-text: var(--color-dark-text-primary);
    --color-text-secondary: var(--color-dark-text-secondary);
    --color-accent: var(--color-mint);
    --color-info: var(--color-cyan);
    --focus-ring-color: var(--color-mint);
    --shadow-elevated: 0 18px 48px rgb(0 0 0 / 0.28);
    --selection-background: rgb(57 255 182 / 0.24);
    --selection-text: var(--color-dark-text-primary);
}