/* ============================================================
 * common.css - 公共样式
 * 后台管理系统UI风格：深色侧边栏 + 白色内容区
 * 包含布局、按钮、表单、表格、弹窗、Toast、卡片等组件样式
 * ============================================================ */

/* ========== CSS变量 ========== */
:root {
    /* 主色调 */
    --primary: #1890ff;
    --primary-hover: #40a9ff;
    --primary-active: #096dd9;
    --primary-light: #e6f7ff;

    /* 功能色 */
    --success: #52c41a;
    --success-light: #f6ffed;
    --warning: #faad14;
    --warning-light: #fffbe6;
    --danger: #ff4d4f;
    --danger-hover: #ff7875;
    --danger-light: #fff2f0;
    --info: #1890ff;
    --info-light: #e6f7ff;

    /* 中性色 */
    --text-primary: rgba(0, 0, 0, 0.85);
    --text-secondary: rgba(0, 0, 0, 0.65);
    --text-hint: rgba(0, 0, 0, 0.45);
    --border-color: #d9d9d9;
    --border-light: #f0f0f0;
    --bg-white: #ffffff;
    --bg-gray: #fafafa;
    --bg-light: #f0f2f5;

    /* 侧边栏 */
    --sidebar-bg: #1a1a2e;
    --sidebar-text: rgba(255, 255, 255, 0.65);
    --sidebar-text-active: #ffffff;
    --sidebar-item-hover: rgba(255, 255, 255, 0.08);
    --sidebar-item-active: #1890ff;
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 64px;

    /* 顶部栏 */
    --header-height: 60px;
    --header-bg: #ffffff;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03), 0 1px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px 0 rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* 圆角 */
    --radius-sm: 2px;
    --radius: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* ========== 布局 ========== */

/* 主布局容器 */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.app-sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    transition: var(--transition);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
    overflow-x: hidden;
}

.app-sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    min-width: var(--sidebar-collapsed-width);
}

/* 主内容区 */
.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-main.expanded {
    margin-left: var(--sidebar-collapsed-width);
}

/* 内容区（顶部栏下方） */
.app-content {
    flex: 1;
    padding: 24px;
    margin-top: var(--header-height);
    background: var(--bg-light);
    min-height: calc(100vh - var(--header-height));
}

/* ========== 顶部栏 ========== */
.app-header {
    height: var(--header-height);
    background: var(--header-bg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    z-index: 99;
    transition: var(--transition);
}

.app-header.expanded {
    left: var(--sidebar-collapsed-width);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-toggle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.header-toggle:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius);
    transition: var(--transition);
    color: var(--text-primary);
}

.header-user:hover {
    background: var(--bg-gray);
}

.header-user i {
    color: var(--text-hint);
}

.header-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 500;
}

.header-logout {
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px 12px;
    border-radius: var(--radius);
    transition: var(--transition);
    font-size: 0.875rem;
}

.header-logout:hover {
    color: var(--danger);
    background: var(--danger-light);
}

/* ========== 侧边栏 ========== */

/* Logo区域 */
.sidebar-logo {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    gap: 12px;
}

.sidebar-logo i {
    font-size: 1.5rem;
    color: var(--primary);
    flex-shrink: 0;
}

.sidebar-logo span {
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
}

/* 菜单区域 */
.sidebar-menu {
    padding: 8px 0;
}

/* 菜单分组标题 */
.sidebar-menu-group-title {
    padding: 16px 20px 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.35);
    white-space: nowrap;
    overflow: hidden;
}

/* 菜单项 */
.sidebar-menu-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    margin: 2px 8px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    color: var(--sidebar-text);
    gap: 12px;
    position: relative;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-menu-item:hover {
    color: var(--sidebar-text-active);
    background: var(--sidebar-item-hover);
}

.sidebar-menu-item.active {
    color: var(--sidebar-text-active);
    background: var(--sidebar-item-active);
    font-weight: 500;
}

.sidebar-menu-item i {
    font-size: 1rem;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-menu-item .menu-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 菜单子项 */
.sidebar-submenu {
    padding-left: 20px;
}

.sidebar-submenu .sidebar-menu-item {
    padding: 10px 20px 10px 36px;
    font-size: 0.875rem;
}

/* 折叠状态 */
.app-sidebar.collapsed .sidebar-logo span,
.app-sidebar.collapsed .menu-text,
.app-sidebar.collapsed .sidebar-menu-group-title {
    display: none;
}

.app-sidebar.collapsed .sidebar-logo {
    justify-content: center;
    padding: 0;
}

.app-sidebar.collapsed .sidebar-menu-item {
    justify-content: center;
    padding: 12px;
    margin: 2px 12px;
}

.app-sidebar.collapsed .sidebar-submenu {
    display: none;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 20px;
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
    white-space: nowrap;
    min-width: 80px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn i {
    font-size: 0.875rem;
}

/* 主按钮 */
.btn-primary {
    color: #fff;
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-primary:active:not(:disabled) {
    background-color: var(--primary-active);
    border-color: var(--primary-active);
}

/* 次按钮 */
.btn-default {
    color: var(--text-primary);
    background-color: #fff;
    border-color: var(--border-color);
}

.btn-default:hover:not(:disabled) {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-default:active:not(:disabled) {
    color: var(--primary-active);
    border-color: var(--primary-active);
}

/* 危险按钮 */
.btn-danger {
    color: #fff;
    background-color: var(--danger);
    border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-hover);
    border-color: var(--danger-hover);
}

/* 文本按钮 */
.btn-text {
    color: var(--primary);
    background: transparent;
    border: none;
    padding: 4px 8px;
    min-width: auto;
}

.btn-text:hover:not(:disabled) {
    color: var(--primary-hover);
    background: var(--primary-light);
}

.btn-text.btn-danger-text {
    color: var(--danger);
}

.btn-text.btn-danger-text:hover:not(:disabled) {
    color: var(--danger-hover);
    background: var(--danger-light);
}

/* 按钮尺寸 */
.btn-sm {
    padding: 4px 12px;
    font-size: 0.8rem;
    min-width: 60px;
}

.btn-lg {
    padding: 10px 24px;
    font-size: 1rem;
    min-width: 100px;
}

/* 块级按钮 */
.btn-block {
    display: flex;
    width: 100%;
}

/* 按钮loading状态 */
.btn.loading {
    position: relative;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    width: 14px;
    height: 14px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
    margin-left: 6px;
}

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

/* ========== 表单 ========== */

/* 表单组 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-label .required {
    color: var(--danger);
    margin-left: 2px;
}

/* 输入框 */
.form-input {
    width: 100%;
    height: 40px;
    padding: 0 12px;
    font-size: 0.875rem;
    color: var(--text-primary);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
}

.form-input:hover {
    border-color: var(--primary-hover);
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.form-input::placeholder {
    color: var(--text-hint);
}

.form-input.error {
    border-color: var(--danger);
}

.form-input.error:focus {
    box-shadow: 0 0 0 2px rgba(255, 77, 79, 0.2);
}

/* 带图标的输入框 */
.form-input-wrapper {
    position: relative;
}

.form-input-wrapper .form-input {
    padding-left: 38px;
}

.form-input-wrapper .input-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-hint);
    font-size: 0.9rem;
    pointer-events: none;
    z-index: 1;
}

.form-input-wrapper .input-suffix {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-hint);
    cursor: pointer;
    z-index: 1;
}

.form-input-wrapper .input-suffix:hover {
    color: var(--text-secondary);
}

/* 文本域 */
.form-textarea {
    width: 100%;
    min-height: 100px;
    padding: 8px 12px;
    font-size: 0.875rem;
    color: var(--text-primary);
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
    resize: vertical;
}

.form-textarea:hover {
    border-color: var(--primary-hover);
}

.form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

/* 复选框 */
.form-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    user-select: none;
}

.form-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

/* 错误信息 */
.form-error {
    font-size: 0.8rem;
    color: var(--danger);
    margin-top: 4px;
    display: none;
}

.form-error.show {
    display: block;
}

/* 表单行内布局 */
.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

/* ========== 表格 ========== */
.table-container {
    background: #fff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead th {
    padding: 14px 16px;
    text-align: left;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-gray);
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 14px 16px;
    font-size: 0.875rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-light);
}

/* 斑马纹 */
.data-table.striped tbody tr:nth-child(even) {
    background: var(--bg-gray);
}

/* hover效果 */
.data-table.hover tbody tr:hover {
    background: var(--primary-light);
}

/* 表格操作列 */
.table-actions {
    display: flex;
    gap: 8px;
}

/* ========== 卡片 ========== */
.card {
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.card-body {
    padding: 24px;
}

.card-footer {
    padding: 12px 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* ========== 弹窗/模态框 ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.modal-dialog {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 520px;
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    animation: slideDown 0.2s ease;
}

.modal-dialog.modal-sm {
    width: 400px;
}

.modal-dialog.modal-lg {
    width: 720px;
}

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 500;
}

.modal-close {
    font-size: 1.1rem;
    color: var(--text-hint);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
    background: var(--bg-gray);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 12px 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    flex-shrink: 0;
}

/* ========== Toast消息提示 ========== */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 280px;
    max-width: 420px;
    pointer-events: auto;
    animation: toastSlideIn 0.3s ease;
    border-left: 4px solid transparent;
}

.toast.removing {
    animation: toastSlideOut 0.3s ease forwards;
}

.toast-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.toast-message {
    flex: 1;
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.toast-close {
    color: var(--text-hint);
    cursor: pointer;
    padding: 2px;
    flex-shrink: 0;
    font-size: 0.8rem;
    transition: var(--transition);
}

.toast-close:hover {
    color: var(--text-primary);
}

/* Toast类型样式 */
.toast-success {
    border-left-color: var(--success);
}
.toast-success .toast-icon {
    color: var(--success);
}

.toast-error {
    border-left-color: var(--danger);
}
.toast-error .toast-icon {
    color: var(--danger);
}

.toast-warning {
    border-left-color: var(--warning);
}
.toast-warning .toast-icon {
    color: var(--warning);
}

.toast-info {
    border-left-color: var(--info);
}
.toast-info .toast-icon {
    color: var(--info);
}

@keyframes toastSlideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes toastSlideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ========== 加载动画 ========== */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: btn-spin 0.6s linear infinite;
}

.spinner-lg {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: inherit;
}

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .app-sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width);
        min-width: var(--sidebar-width);
    }

    .app-sidebar.mobile-open {
        transform: translateX(0);
    }

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

    .app-header {
        left: 0;
    }

    .app-sidebar.collapsed,
    .app-main.expanded,
    .app-header.expanded {
        /* 移动端不使用折叠状态 */
    }

    .mobile-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.45);
        z-index: 99;
        display: none;
    }

    .mobile-overlay.show {
        display: block;
    }
}

/* ========== 动画 ========== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.text-left   { text-align: left; }

.mt-8  { margin-top: 8px;  }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8  { margin-bottom: 8px;  }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.ml-8  { margin-left: 8px;  }
.mr-8  { margin-right: 8px; }

.flex       { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-1     { flex: 1; }
.gap-8      { gap: 8px; }
.gap-12     { gap: 12px; }
.gap-16     { gap: 16px; }

.text-primary   { color: var(--primary); }
.text-success   { color: var(--success); }
.text-warning   { color: var(--warning); }
.text-danger    { color: var(--danger); }
.text-secondary { color: var(--text-secondary); }
.text-hint      { color: var(--text-hint); }

.font-sm { font-size: 0.8rem; }
.font-md { font-size: 0.875rem; }

.w-full { width: 100%; }

.hidden { display: none !important; }

.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}