html[data-theme="high-contrast"] .btn {
    --color-text: #ffffff;
    --color-bg: #000000;
    --color-dark-bg: #000000;
    --color-border: #000000;
    --color-shadow-1: #ffffff;
    --color-shadow-2: #000000;
    --color-shadow-3: #000000;
    --color-hover-text: #000000;
    --color-hover-bg: var(--color-light-accent);
    --color-hover-border: #000000;
    --text-shadow: none;
}

html[data-theme="high-contrast"] .btn:focus-visible {
    outline: 3px solid var(--color-light-accent);
    outline-offset: 2px;
}