/* 優化版用戶界面樣式 - 改善頭像加載性能 */

/* 登入區域基本樣式 */
#loginAjax {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    transition: all 0.3s ease;
}

/* 已登入用戶狀態樣式 */
#loginAjax > div:not(.login-status-guest) {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0rem;
    background: transparent;
    border: none;
    border-radius: 0;
    position: relative;
}

#loginAjax > div:not(.login-status-guest):hover {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

/* 頭像樣式優化 */
#loginAjax img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    /* 優化圖片渲染 */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    backface-visibility: hidden;
    transform: translateZ(0);
}

#loginAjax img:hover {
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.05);
}

#loginAjax img::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* 用戶名樣式 */
#loginAjax span {
    color: #ffffff;
    font-weight: 500;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 鏈接樣式 */
#loginAjax a:not(.login-btn) {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

#loginAjax a:not(.login-btn):hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
    color: white;
    text-decoration: none;
}

/* 訪客狀態樣式 */
.login-status-guest {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem;
}

/* 登入按鈕樣式 */
.login-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.login-btn:first-child {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-btn:last-child {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.login-btn:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
    color: white;
    text-decoration: none;
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

/* 簡化用戶狀態樣式 */
.simple-user-status {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem;
    position: relative;
}

.simple-user-status:hover {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

/* 頭像樣式 */
.user-avatar-simple {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    /* 優化圖片渲染 */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    backface-visibility: hidden;
    transform: translateZ(0);
}

.user-avatar-simple:hover {
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.05);
}

.user-avatar-simple::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* 管理中心鏈接樣式 */
.manage-center-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
}

.manage-center-link:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
    color: white;
    text-decoration: none;
}

.manage-center-link:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

/* 用戶下拉菜單樣式 */
.user-dropdown {
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.simple-user-status:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
}

/* 響應式設計 */
@media (max-width: 768px) {
    #loginAjax > div:not(.login-status-guest) {
        flex-direction: column;
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    #loginAjax img {
        width: 35px;
        height: 35px;
    }
    
    .login-status-guest {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .login-btn {
        width: 100%;
        justify-content: center;
    }
}

/* 性能優化樣式 */
* {
    box-sizing: border-box;
}

/* 登入區域性能優化 */
#loginAjax *,
#loginAjax *::before,
#loginAjax *::after {
    /* 使用硬件加速 */
    will-change: auto;
    /* 優化動畫性能 */
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* 頭像加載優化 */
.user-avatar-simple {
    /* 防止圖片閃爍 */
    opacity: 0;
    animation: fadeIn 0.3s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 加載狀態樣式 */
.login-loading-state {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    color: #666;
    font-size: 0.875rem;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}