:root {
    /* Palette contract: black, white and the gold-effect gradient only. */
    --ef-black: #000;
    --ef-white: #fff;
    --ef-gold-base: #EAC761;
    --ef-gold-rgb: 234, 199, 97;
    --ef-gold-highlight: #F4E383;
    --ef-gold-highlight-rgb: 244, 227, 131;
    --ef-gold: var(--ef-gold-base);
    --ef-gold-effect: linear-gradient(110deg, var(--ef-gold-base) 0%, var(--ef-gold-highlight) 50%, var(--ef-gold-base) 100%);

    /* Cores e superfícies */
    --ef-color-page: var(--ef-white);
    --ef-color-surface: var(--ef-white);
    --ef-color-text: var(--ef-black);
    --ef-color-muted: rgba(0, 0, 0, 0.68);
    --ef-color-muted-on-dark: rgba(255, 255, 255, 0.72);
    --ef-color-border: rgba(0, 0, 0, 0.14);
    --ef-color-border-on-dark: rgba(255, 255, 255, 0.16);
    --ef-track: rgba(255, 255, 255, 0.18);

    /* Compatibility aliases for older components. */
    --ink: var(--ef-black);

    /* Espaçamento e forma */
    --ef-page-gutter: clamp(16px, 3vw, 48px);
    --ef-section-gap: clamp(24px, 5vw, 72px);
    --ef-section-radius: 24px;
    --ef-control-radius: 999px;

    /* Movimento e profundidade */
    --ef-shadow-soft: 0 12px 36px rgba(0, 0, 0, 0.08);
    --ef-transition-standard: 180ms ease;
}