/* 
 * 管理后台样式
 */

/* ========== 登录页面 ========== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 50px;
    max-width: 450px;
    width: 100%;
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header h1 {
    font-size: 32px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-header p {
    color: var(--text-muted);
    font-size: 14px;
}

.login-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

/* ========== 后台布局 ========== */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-header {
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    font-size: 20px;
    margin-bottom: 5px;
}

.sidebar-header p {
    font-size: 12px;
    opacity: 0.7;
}

.sidebar-menu {
    list-style: none;
    padding: 20px 0;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    color: rgba(255, 255, 255, 0.8);
    transition: all 0.3s;
    text-decoration: none;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-left: 4px solid #667eea;
}

.sidebar-menu .icon {
    margin-right: 12px;
    font-size: 18px;
    width: 24px;
    text-align: center;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    background: #f5f7fa;
}

.top-bar {
    background: white;
    padding: 20px 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar h1 {
    font-size: 24px;
    color: var(--text-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.content-area {
    padding: 30px;
}

/* ========== 面包屑 ========== */
.breadcrumb {
    display: flex;
    list-style: none;
    padding: 15px 0;
    margin-bottom: 20px;
    gap: 10px;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li::after {
    content: "›";
    margin-left: 10px;
    color: var(--text-muted);
}

.breadcrumb li:last-child::after {
    display: none;
}

.breadcrumb a {
    color: var(--primary-color);
}

.breadcrumb .active {
    color: var(--text-muted);
}

/* ========== 操作按钮组 ========== */
.action-buttons {
    display: flex;
    gap: 10px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

/* ========== 模态框 ========== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-dialog {
    background: white;
    border-radius: 12px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    padding: 15px 25px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ========== 图片预览 ========== */
.qr-preview {
    max-width: 300px;
    margin: 20px auto;
    text-align: center;
}

.qr-preview img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state h3 {
    margin-bottom: 10px;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .login-box {
        padding: 30px;
    }
}