.campus-ai-widget,
.campus-ai-widget * {
    box-sizing: border-box;
}


.campus-ai-widget {
    --ai-size: 105px;
    --ai-gap: 10px;

    position: fixed;
    right: calc(22px + env(safe-area-inset-right));
    bottom: calc(76px + env(safe-area-inset-bottom));
    z-index: 99999;

    display: block;
    width: var(--ai-size);
    height: var(--ai-size);

    font-family:
        "Noto Sans TC",
        "Microsoft JhengHei",
        Arial,
        sans-serif;
}


.campus-ai-message {
    position: absolute;
    left: 50%;
    bottom: calc(100% + var(--ai-gap));
    transform: translateX(-50%);

    display: block;
    width: max-content;
    max-width: calc(100vw - 24px);
    padding: 10px 12px;

    color: #444;
    font-size: 13px;
    line-height: 1.45;
    text-align: center;
    white-space: nowrap;

    background: rgba(255, 255, 255, 0.97);
    border: 2px solid #24449b;
    border-radius: 14px;
    box-shadow: 0 5px 18px rgba(0, 0, 0, 0.20);


    pointer-events: none;
}


.campus-ai-text-default {
    display: inline;
}


.campus-ai-text-hover {
    display: none;
}


@media (hover: hover) and (pointer: fine) {
    .campus-ai-widget:hover .campus-ai-text-default {
        display: none;
    }

    .campus-ai-widget:hover .campus-ai-text-hover {
        display: inline;
    }
}


.campus-ai-message::before,
.campus-ai-message::after {
    position: absolute;
    left: 50%;
    content: "";
    transform: translateX(-50%);
    border-style: solid;
}

.campus-ai-message::before {
    bottom: -12px;
    border-width: 11px 10px 0;
    border-color: #24449b transparent transparent;
}

.campus-ai-message::after {
    bottom: -8px;
    border-width: 8px 7px 0;
    border-color: #fff transparent transparent;
}


.campus-ai-link {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 20px;

    transition: filter 0.20s ease;
    transform: none !important;
    scale: 1 !important;

    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.campus-ai-link img {
    display: block;
    width: 100%;
    height: 100%;
    max-width: 100%;
    object-fit: contain;
    border: 0;
    border-radius: 20px;
    filter: drop-shadow(0 5px 8px rgba(0, 0, 0, 0.28));

    transform: none !important;
    scale: 1 !important;
}

/* hover / active / focus 一律不縮放 */
.campus-ai-link:hover,
.campus-ai-link:active,
.campus-ai-link:focus,
.campus-ai-link:focus-within {
    transform: none !important;
    scale: 1 !important;
}

.campus-ai-link:hover {
    filter: brightness(1.08);
}

.campus-ai-link:focus-visible {
    outline: 4px solid rgba(215, 25, 32, 0.45);
    outline-offset: 4px;
}


@media screen and (max-width: 768px) {


    html,
    body {
        max-width: 100%;
        overflow-x: clip;
    }

    @supports not (overflow: clip) {
        html,
        body {
            overflow-x: hidden;
        }
    }

    .campus-ai-widget {
        --ai-size: 82px;
        --ai-gap: 8px;


        right: calc(20px + env(safe-area-inset-right));


        bottom: calc(72px + env(safe-area-inset-bottom));
    }

    .campus-ai-message {
        max-width: calc(100vw - 24px);
        padding: 8px 10px;
        border-radius: 12px;
        font-size: 12px;
        line-height: 1.4;
    }
}


@media screen and (max-width: 480px) {
    .campus-ai-widget {
        --ai-size: 72px;
        --ai-gap: 7px;


        right: calc(24px + env(safe-area-inset-right));
        bottom: calc(68px + env(safe-area-inset-bottom));
    }

    .campus-ai-link,
    .campus-ai-link img {
        border-radius: 16px;
    }

    .campus-ai-message {
        max-width: calc(100vw - 20px);
        padding: 7px 9px;
        border-radius: 12px;
        font-size: 12px;
    }
}


@media (hover: none) and (pointer: coarse) {
    .campus-ai-link:hover {
        filter: none;
        transform: none !important;
        scale: 1 !important;
    }
}


@media (prefers-reduced-motion: reduce) {
    .campus-ai-link {
        transition: none;
    }
}