:root {
    --tooltip-color-en: #FF7F41;
    --tooltip-color-ja: #F3FF41;
}

.tooltip-word {
    position: relative;
    display: inline-block;
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
    cursor: pointer;
    /* Removed color: #000; to allow proper color inheritance */
}

.tooltip-word.tooltip-en {
    text-decoration-color: var(--tooltip-color-en);
}

.tooltip-word.tooltip-ja {
    text-decoration-color: var(--tooltip-color-ja);
}

.tooltip-word:hover {
    text-decoration-style: solid;
}

.tooltip-text {
    visibility: hidden;
    position: absolute;
    z-index: 1000;
    bottom: 125%;
    left: 0;
    transform: none;
    min-width: 280px;
    max-width: 400px;
    background-color: #212529;
    color: #fff;
    text-align: left;
    padding: 35px;
    border-radius: 6px;
    font-size: 14px;
    line-height: 1.6;
    opacity: 0;
    transition: opacity 0.3s;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    border: none;
    white-space: pre-line;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans CJK JP", "Yu Gothic", sans-serif;
}

.tooltip-text.active {
    visibility: visible;
    opacity: 1;
}

.tooltip-close {
    position: absolute;
    top: 8px;
    right: 8px;
    cursor: pointer;
    font-size: 24px;
    opacity: 0.9;
    transition: opacity 0.2s;
    padding: 2px 8px;
    line-height: 1;
    font-weight: bold;
    margin-left: 15px;
}

.tooltip-en .tooltip-close {
    color: var(--tooltip-color-en);
}

.tooltip-ja .tooltip-close {
    color: var(--tooltip-color-ja);
}

.tooltip-close:hover {
    opacity: 1;
}

.tooltip-text::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 20px;
    margin-left: 0;
    border-width: 8px;
    border-style: solid;
    border-color: #212529 transparent transparent transparent;
}

@media screen and (max-width: 768px) {
    .tooltip-text {
        max-width: calc(100vw - 20px);
        margin-left: 10px;
        box-sizing: border-box;
    }
}