:root {
    --tcn-color-primary: #6f8f7a;
    --tcn-color-primary-hover: #5e7a67;
    --tcn-color-primary-dark: var(--tcn-color-primary-hover);
    --tcn-color-primary-soft: #edf2ee;
    --tcn-color-graphite: #23252b;
    --tcn-color-background: #fcfcfa;
    --tcn-color-surface: #ffffff;
    --tcn-color-surface-alt: #f4f1ed;
    --tcn-color-border: #e6e8e3;
    --tcn-color-text: #1b1d1c;
    --tcn-color-muted: #6b7280;
    --tcn-color-warm-sand: #d9ccbe;
    --tcn-color-on-dark: #f7f7f2;
    --tcn-color-success: #5e7a67;
    --tcn-color-warning: #9a713f;
    --tcn-color-error: #9b4545;

    --tcn-font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --tcn-font-heading: var(--tcn-font-sans);

    --tcn-size-container: 1280px;
    --tcn-size-content: 800px;
    --tcn-space-xs: 0.5rem;
    --tcn-space-sm: 0.75rem;
    --tcn-space-md: 1rem;
    --tcn-space-lg: 1.5rem;
    --tcn-space-xl: 2rem;
    --tcn-space-2xl: 3rem;
    --tcn-space-3xl: 4rem;

    --tcn-radius-sm: 6px;
    --tcn-radius-md: 10px;
    --tcn-radius-lg: 16px;
    --tcn-radius-pill: 999px;
    --tcn-border-width: 1px;
    --tcn-shadow-soft: 0 8px 24px rgba(35, 37, 43, 0.06);
    --tcn-shadow-lifted: 0 14px 34px rgba(35, 37, 43, 0.1);

    --tcn-transition-fast: 250ms ease;
}