:root {
    /* Clear ice blue. Alternatives: pearl #F1F3F5, lavender #F0ECFF, cyan #E8FAFC. */
    --cgu-wave-color: #B5D7FF;
}

body.cgu-wave-theme {
    background-color: #FFFFFF;
    isolation: isolate;
}

.cgu-waves {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: #FFFFFF;
    pointer-events: none;
    user-select: none;
}

.cgu-waves canvas {
    display: block;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* Expose the white background through page shells, keeping component/section fills intact.
   The same white base remains when JavaScript or WebGL is unavailable. */
.cgu-wave-theme :is(.cgu-home, .cgu-about, .cgu-contact,
    .cgu-staff, .cgu-gal, .cgu-mod, .cgu-blog, .cgu-opp) {
    background-color: transparent;
}