/* 通用身份頁籤樣式 */
.user-badge-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    font-family: 'Segoe UI', Arial, sans-serif;
}

.user-badge {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 12px 20px;
    border-radius: 25px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    font-size: 14px;
    min-width: 120px;
    justify-content: center;
}

.user-badge:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.user-badge.logged-in {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
}

.user-badge .avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    object-fit: contain;
    background: transparent;
    filter: brightness(0) invert(1);
    padding: 2px;
}

.user-badge .user-icon {
    font-size: 20px;
}

.user-badge .user-name {
    font-weight: 600;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-badge .status-text {
    opacity: 0.9;
}

/* 導航索引表 */
.nav-dropdown {
    position: absolute;
    top: 52px;
    right: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    min-width: 220px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    pointer-events: none; /* 隱藏時不接收鼠標事件 */
}

/* 填補間隙的橋接區域（不可見） */
.nav-dropdown::before {
    content: '';
    position: absolute;
    top: -8px; /* 向上延伸到 badge 區域 */
    left: 0;
    right: 0;
    height: 8px; /* 覆蓋間隙 */
    background: transparent;
}

.nav-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto; /* 顯示時可接收鼠標事件 */
}

.nav-dropdown-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 20px;
    font-weight: 600;
}

.nav-dropdown-header .user-email {
    font-size: 12px;
    opacity: 0.9;
    margin-top: 5px;
}

.nav-dropdown-body {
    padding: 10px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: #333;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.nav-item:hover {
    background: #f5f7fa;
    padding-left: 25px;
}

.nav-item .icon {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-item .label {
    font-weight: 500;
    font-size: 14px;
}

/* 內聯子項目樣式 */
.nav-subitem-inline {
    padding-left: 40px;
    background: rgba(102, 126, 234, 0.03);
}

.nav-subitem-inline:hover {
    background: rgba(102, 126, 234, 0.08);
    padding-left: 45px;
}

.nav-subitem-inline .icon.subitem-icon {
    font-size: 14px;
    color: #667eea;
    width: 16px;
}

.nav-divider {
    height: 1px;
    background: #e9ecef;
    margin: 8px 0;
}

.nav-logout {
    color: #dc3545;
}

.nav-logout:hover {
    background: #fee;
}

/* 登入提示 */
.login-prompt {
    text-align: center;
    padding: 20px;
}

.login-prompt p {
    color: #666;
    margin-bottom: 15px;
    font-size: 14px;
}

.login-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    margin: 0 auto;
    transition: all 0.3s ease;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* 載入動畫 */
.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 響應式設計 */
@media (max-width: 768px) {
    .user-badge-container {
        top: 10px;
        right: 10px;
    }

    .user-badge {
        padding: 10px 16px;
        font-size: 13px;
        min-width: 100px;
    }

    .user-badge .avatar {
        width: 24px;
        height: 24px;
        padding: 2px;
    }

    .nav-dropdown {
        top: 50px;
        min-width: 200px;
    }

    .user-badge .user-name {
        max-width: 100px;
    }
}

/* 暗色主題支持 */
@media (prefers-color-scheme: dark) {
    .nav-dropdown {
        background: #2d3748;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    }

    .nav-dropdown-body {
        background: #2d3748;
    }

    .nav-item {
        color: #e2e8f0;
    }

    .nav-item:hover {
        background: #374151;
    }

    .nav-subitem-inline {
        background: rgba(102, 126, 234, 0.1);
    }

    .nav-subitem-inline:hover {
        background: rgba(102, 126, 234, 0.2);
    }

    .nav-divider {
        background: #4a5568;
    }

    .login-prompt p {
        color: #cbd5e0;
    }
}