/* 多言語切り替えボタンのスタイル */
.language-switcher {
    display: flex;
    gap: 10px;
    align-items: center;
}

.lang-btn {
    background: transparent;
    border: 1px solid #fff;
    color: #fff;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: bold;
    transition: all 0.3s ease;
    min-width: 40px;
    text-align: center;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.lang-btn.active {
    background: #fff;
    color: #000;
}

/* 翻訳中のローディング表示 */
.translating {
    position: relative;
}

.translating::after {
    content: 'Translating...';
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 12px 20px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    z-index: 9999;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* 順次翻訳のための要素別スタイル */
.translating-element {
    position: relative;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    background-size: 200% 100%;
    animation: translating-wave 1.5s infinite;
    border-radius: 4px;
    padding: 2px 4px;
    margin: -2px -4px;
}

@keyframes translating-wave {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.translated-element {
    position: relative;
    background: rgba(46, 204, 113, 0.15);
    border-radius: 4px;
    padding: 2px 4px;
    margin: -2px -4px;
    animation: translated-flash 1s ease-out;
}

@keyframes translated-flash {
    0% {
        background: rgba(46, 204, 113, 0.3);
        transform: scale(1.02);
    }
    100% {
        background: rgba(46, 204, 113, 0.15);
        transform: scale(1);
    }
}

.translation-error {
    position: relative;
    background: rgba(231, 76, 60, 0.15);
    border-radius: 4px;
    padding: 2px 4px;
    margin: -2px -4px;
    animation: error-flash 2s ease-out;
}

@keyframes error-flash {
    0%, 10% {
        background: rgba(231, 76, 60, 0.3);
        transform: scale(1.02);
    }
    100% {
        background: rgba(231, 76, 60, 0.15);
        transform: scale(1);
    }
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .language-switcher {
        gap: 5px;
    }
    
    .lang-btn {
        padding: 6px 8px;
        font-size: 11px;
        min-width: 25px;
    }
    
    .translating::after {
        top: 10px;
        right: 10px;
        padding: 8px 16px;
        font-size: 12px;
    }
    
    .translating-element,
    .translated-element,
    .translation-error {
        padding: 1px 2px;
        margin: -1px -2px;
    }
}

/* プルダウン用のスタイル */
.lang-dropdown {
    position: relative;
    display: inline-block;
}

.lang-dropdown-btn {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.6));
    border: 1px solid #FFF;
    color: #fff;
    padding: 10px 18px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 90px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.lang-dropdown-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.lang-dropdown-btn:hover::before {
    left: 100%;
}

.lang-dropdown-btn:hover {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.7));
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.lang-dropdown-btn:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.lang-dropdown-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid rgba(255, 255, 255, 0.8);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-left: 5px;
}

.lang-dropdown.open .lang-dropdown-btn::after {
    transform: rotate(180deg);
    border-top-color: #fff;
}

.lang-dropdown-content {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: -50%;
    background: rgba(0, 0, 0, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    z-index: 1000;
    min-width: 140px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(20px);
    overflow: hidden;
    opacity: 0;
    transform: translateY(-10px) scale(0.95);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.lang-dropdown.open .lang-dropdown-content {
    display: block;
    opacity: 1;
    transform: translateY(0) scale(1);
}

.lang-dropdown-item {
    display: block;
    width: 100%;
    padding: 14px 18px;
    background: transparent;
    border: none;
    color: #fff;
    text-align: left;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: relative;
    overflow: hidden;
}

.lang-dropdown-item:last-child {
    border-bottom: none;
}

.lang-dropdown-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.3s;
}

.lang-dropdown-item:hover::before {
    left: 100%;
}

.lang-dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(6px);
    color: #fff;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.lang-dropdown-item:active {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(3px);
}

.lang-dropdown-item:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.1);
}

/* レスポンシブ対応の更新 */
@media (max-width: 768px) {
    .lang-dropdown-btn {
        padding: 8px 14px;
        font-size: 12px;
        min-width: 80px;
        border-radius: 10px;
    }
    
    .lang-dropdown-item {
        padding: 12px 16px;
        font-size: 12px;
    }
    
    .lang-dropdown-content {
        min-width: 120px;
        border-radius: 10px;
    }
}

@media (max-width: 480px) {
    .lang-dropdown-btn {
        padding: 6px 12px;
        font-size: 11px;
        min-width: 70px;
        border-radius: 8px;
    }
    
    .lang-dropdown-item {
        padding: 10px 14px;
        font-size: 11px;
    }
    
    .lang-dropdown-content {
        min-width: 100px;
        border-radius: 8px;
    }
}