/*@example <button>Click</button>*/
@layer component {
    :root {
        --button-padding-block: var(--control-padding-block, var(--space-xs));
        --button-padding-inline: var(--control-padding-inline, var(--space-s));
        --button-border-radius: var(--control-border-radius, var(--border-radius));
        --button-border: none;
        --button-background: var(--control-background, var(--background-darker-color));
        --button-color: var(--control-color, var(--text-color));
        --button-loading-spinner-size: var(--size-m);
        --button-loading-spinner-border: var(--border);
        --button-loading-spinner-color: var(--call-to-action-color);
        --button-icon-only-size: var(--control-size, var(--size-l));
        --button-ghost-background: transparent;
        --button-ghost-border: 1px solid var(--background-lighter-color);
        --button-ghost-color: var(--foreground-color);
        --button-ai-background: var(--background-darker-color);
        --button-ai-color: var(--text-color);
    }
    button,
    [is=button] {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: var(--button-padding-block) var(--button-padding-inline);
        border-radius: var(--button-border-radius);
        border: var(--button-border);
        background: var(--button-background);
        color: var(--button-color);
        cursor: pointer;

        &:any-link {
            text-decoration: none;
        }

        &[now~=loading] {
            position: relative;
            color: transparent;
            pointer-events: none;

            &::after {
                content: "";
                position: absolute;
                top: 50%;
                left: 50%;
                width: var(--button-loading-spinner-size);
                height: var(--button-loading-spinner-size);
                margin-top: calc(-1 * var(--button-loading-spinner-size) / 2);
                margin-left: calc(-1 * var(--button-loading-spinner-size) / 2);
                border: var(--button-loading-spinner-border);
                border-radius: 50%;
                border-top-color: var(--button-loading-spinner-color);
                animation: spin 1s linear infinite;
            }
        }

        &:disabled {
            opacity: .5;
            cursor: not-allowed;
        }

        &[has~=icon-only] {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: var(--button-icon-only-size);
            height: var(--button-icon-only-size);
            padding: 0;

            & [is=icon] {
                margin-right: 0;
            }
        }

        &[has~=ghost-style] {
            background: var(--button-ghost-background);
            border: var(--button-ghost-border);
            color: var(--button-ghost-color);
        }

        &:not([is=icon-button])[has~=ai-style] {
            --ai-border-width: 2px;
            --ai-rainbow-gradient: linear-gradient(90deg, #ff4d4d, #ffb84d, #ffff4d, #4dff88, #4dd2ff, #7a5cff, #ff4de1, #ff4d4d);
            --ai-rainbow-size: 300% 300%;
            --ai-rainbow-duration: 6s;
            position: relative;
            border: none;
            background: var(--button-ai-background);
            isolation: isolate;

            & [data-role=ai-label],
            & [is=icon]::before {
                color: var(--button-ai-color);
            }

            &::before {
                content: "";
                position: absolute;
                inset: 0;
                border-radius: inherit;
                padding: var(--ai-border-width);
                background: var(--ai-rainbow-gradient);
                background-size: var(--ai-rainbow-size);
                background-position: 0% 50%;
                animation: ai-rainbow-shift var(--ai-rainbow-duration) linear infinite;
                -webkit-mask:
                    linear-gradient(#fff 0 0) content-box,
                    linear-gradient(#fff 0 0);
                -webkit-mask-composite: xor;
                mask:
                    linear-gradient(#fff 0 0) content-box,
                    linear-gradient(#fff 0 0);
                mask-composite: exclude;
                pointer-events: none;
            }

            @supports ((-webkit-background-clip: text) or (background-clip: text)) {
                & [data-role=ai-label],
                & [is=icon]::before {
                    background-image: var(--ai-rainbow-gradient);
                    background-size: var(--ai-rainbow-size);
                    background-position: 0% 50%;
                    -webkit-background-clip: text;
                    background-clip: text;
                    color: transparent;
                    animation: ai-rainbow-shift var(--ai-rainbow-duration) linear infinite;
                }
            }
        }
    }

    @keyframes ai-rainbow-shift {
        0% {
            background-position: 0% 50%;
        }
        50% {
            background-position: 100% 50%;
        }
        100% {
            background-position: 0% 50%;
        }
    }
}