.kana-popup {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(255, 255, 255, 0.08); /* Reduced opacity for enhanced transparency */
    backdrop-filter: blur(15px) saturate(140%);
    -webkit-backdrop-filter: blur(15px) saturate(140%);
    border: 2px solid rgba(255, 105, 180, 0.25);
    border-radius: 20px;
    padding: 15px 25px;
    box-shadow: 
        0 8px 32px rgba(31, 38, 135, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.2) inset,
        0 0 20px rgba(255, 255, 255, 0.4) inset;
    z-index: 10000;
    display: flex;
    align-items: center;
    gap: 20px;
    max-width: 90%;
    min-width: 300px;
    overflow: hidden;
}

.kana-popup.hidden {
    opacity: 0;
    transform: translate(-50%, -100%);
    pointer-events: none;
}

.kana-popup-text {
    color: #e4e4e4;
    font-size: 16px;
    line-height: 1.5;
    text-align: center;
    flex: 1;
}

.kana-popup-text ruby {
    text-decoration: none;
}

.kana-popup-text rt {
    color: #ff69b4;
    font-size: 12px;
}

.kana-popup-link {
    color: #ff69b4;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
    display: inline-block;
    padding: 5px 10px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    margin: 5px 0;
    border: 1px solid rgba(255, 105, 180, 0.3);
}

.kana-popup-link:hover {
    color: #ff1493;
    background: rgba(255, 255, 255, 0.5);
}

.kana-popup-close {
    background: linear-gradient(to bottom, #ff69b4, #ff1493);
    color: white;
    border: none;
    border-radius: 20px;
    padding: 10px 20px;
    min-width: 120px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.2;
    box-shadow: 0 4px 15px rgba(255, 105, 180, 0.3);
    white-space: nowrap;
}

.kana-popup-close:hover {
    background: linear-gradient(to bottom, #ff1493, #ff69b4);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(255, 105, 180, 0.4);
}

@media (max-width: 768px) {
    .kana-popup {
        flex-direction: column;
        padding: 15px;
        gap: 15px;
    }

    .kana-popup-text {
        font-size: 14px;
    }

    .kana-popup-text rt {
        font-size: 10px;
    }

    .kana-popup-close {
        width: 100%;
        min-width: unset;
        padding: 8px 16px;
        font-size: 13px;
    }
}