/**
 * 学生社团档案管理系统 - 样式表
 * 灵动简约风，主色调#165DFF，辅助色#36CFC9
 */

/* ========== CSS变量定义 ========== */
:root {
    /* 主色调 */
    --primary-color: #165DFF;
    --primary-hover: #4080FF;
    --primary-active: #0D47A1;
    --primary-light: #E6F0FF;
    
    /* 辅助色 */
    --secondary-color: #36CFC9;
    --secondary-hover: #5DDDD5;
    --secondary-active: #2BA3A0;
    --secondary-light: #E0F7F6;
    
    /* 中性色 */
    --bg-color: #F5F7FA;
    --card-bg: #FFFFFF;
    --border-color: #E5E6EB;
    --border-light: #F0F0F0;
    --text-primary: #1D2129;
    --text-secondary: #4E5969;
    --text-muted: #86909C;
    --text-disabled: #C9CDD4;
    
    /* 状态色 */
    --success-color: #52C41A;
    --success-light: #F6FFED;
    --warning-color: #FAAD14;
    --warning-light: #FFFBE6;
    --error-color: #FF4D4F;
    --error-light: #FFF1F0;
    --info-color: #1890FF;
    --info-light: #E6F7FF;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 布局 */
    --sidebar-width: 240px;
    --sidebar-collapsed: 64px;
    --header-height: 60px;
    --footer-height: 50px;
}

/* ========== 基础重置 ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ========== 通用组件 ========== */

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    background-color: var(--primary-active);
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-text {
    background: transparent;
    color: var(--primary-color);
    padding: 6px 12px;
}

.btn-text:hover {
    background-color: var(--primary-light);
}

.btn-danger {
    background-color: var(--error-color);
    color: white;
}

.btn-danger:hover {
    background-color: #FF7875;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 16px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* 输入框 */
.input-group {
    margin-bottom: 16px;
}

.input-label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.input-label .required {
    color: var(--error-color);
    margin-left: 4px;
}

.input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    transition: all var(--transition-fast);
    background-color: white;
}

.input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input:disabled {
    background-color: var(--bg-color);
    cursor: not-allowed;
}

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

.input.error:focus {
    box-shadow: 0 0 0 3px var(--error-light);
}

.input-error {
    color: var(--error-color);
    font-size: 12px;
    margin-top: 4px;
}

.input-sm {
    padding: 6px 10px;
    font-size: 12px;
}

/* 下拉框 */
.select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    background-color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2386909C' d='M2.5 4.5L6 8l3.5-3.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

.select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* 复选框 */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox {
    width: 18px;
    height: 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    appearance: none;
    background-color: white;
}

.checkbox:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='white' d='M10.28 2.28L4.5 8.06 1.72 5.28a1 1 0 00-1.44 1.44l3.5 3.5a1 1 0 001.44 0l7-7a1 1 0 00-1.44-1.44z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

/* 卡片 */
.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-light);
}

/* 表格 */
.table-wrapper {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.table th {
    background-color: var(--bg-color);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

.table tr:hover td {
    background-color: var(--bg-color);
}

.table-actions {
    display: flex;
    gap: 8px;
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 20px;
}

.pagination-item {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
    background-color: white;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.pagination-item:hover:not(.disabled):not(.active) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    font-size: 14px;
    color: var(--text-muted);
    margin-right: 16px;
}

/* 模态框 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay.show .modal {
    transform: scale(1);
}

.modal-lg {
    max-width: 900px;
}

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

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

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

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

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* 提示消息 */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    min-width: 280px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

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

.toast-success {
    background-color: var(--success-light);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.toast-error {
    background-color: var(--error-light);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

.toast-warning {
    background-color: var(--warning-light);
    border: 1px solid var(--warning-color);
    color: var(--warning-color);
}

.toast-info {
    background-color: var(--info-light);
    border: 1px solid var(--info-color);
    color: var(--info-color);
}

/* 加载动画 */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.spinner-lg {
    width: 60px;
    height: 60px;
    border-width: 4px;
}

/* 空状态 */
.empty-state {
    padding: 60px 20px;
    text-align: center;
}

.empty-icon {
    font-size: 48px;
    color: var(--text-disabled);
    margin-bottom: 16px;
}

.empty-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-desc {
    font-size: 14px;
    color: var(--text-muted);
}

/* 标签 */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-full);
}

.tag-primary {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.tag-success {
    background-color: var(--success-light);
    color: var(--success-color);
}

.tag-warning {
    background-color: var(--warning-light);
    color: var(--warning-color);
}

.tag-error {
    background-color: var(--error-light);
    color: var(--error-color);
}

.tag-secondary {
    background-color: var(--secondary-light);
    color: var(--secondary-color);
}

/* 头像 */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
}

.avatar-sm {
    width: 32px;
    height: 32px;
    font-size: 14px;
}

.avatar-lg {
    width: 64px;
    height: 64px;
    font-size: 24px;
}

/* 统计卡片 */
.stat-card {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.stat-icon-primary {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.stat-icon-secondary {
    background-color: var(--secondary-light);
    color: var(--secondary-color);
}

.stat-icon-warning {
    background-color: var(--warning-light);
    color: var(--warning-color);
}

.stat-icon-error {
    background-color: var(--error-light);
    color: var(--error-color);
}

.stat-info {
    flex: 1;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* 工具栏 */
.toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.toolbar-search {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 200px;
    max-width: 400px;
}

.toolbar-search .input {
    flex: 1;
}

/* 筛选栏 */
.filter-bar {
    background-color: var(--card-bg);
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.filter-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-item .input,
.filter-item .select {
    width: auto;
    min-width: 150px;
}

/* 上传区域 */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 20px;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
}

.upload-icon {
    font-size: 48px;
    color: var(--text-disabled);
    margin-bottom: 12px;
}

.upload-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.upload-text strong {
    color: var(--primary-color);
}

/* 文件列表 */
.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.file-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 16px;
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.file-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.file-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--primary-color);
    background-color: var(--primary-light);
    border-radius: var(--radius-md);
}

.file-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-bottom: 8px;
}

.file-meta {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}

.file-actions {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
}

/* 活动卡片 */
.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.activity-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.activity-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.activity-cover {
    height: 160px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
}

.activity-content {
    padding: 16px;
}

.activity-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.activity-info {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.activity-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
}

/* 照片墙 */
.photo-wall {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
}

.photo-item {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    position: relative;
}

.photo-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.photo-item:hover img {
    transform: scale(1.1);
}

.photo-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.photo-item:hover .photo-overlay {
    opacity: 1;
}

.photo-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: white;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.photo-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

/* 图片预览 */
.image-preview {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.image-preview.show {
    opacity: 1;
    visibility: visible;
}

.image-preview img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.image-preview-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.image-preview-close:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.image-preview-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.image-preview-nav:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

.image-preview-prev {
    left: 20px;
}

.image-preview-next {
    right: 20px;
}

/* 确认对话框 */
.confirm-modal .modal {
    max-width: 400px;
}

.confirm-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.confirm-icon-warning {
    background-color: var(--warning-light);
    color: var(--warning-color);
}

.confirm-icon-danger {
    background-color: var(--error-light);
    color: var(--error-color);
}

.confirm-title {
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 8px;
}

.confirm-message {
    font-size: 14px;
    color: var(--text-muted);
    text-align: center;
}

/* 图表容器 */
.chart-container {
    width: 100%;
    height: 300px;
    position: relative;
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-disabled);
}

/* 响应式 */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 240px;
    }
    
    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .toolbar-search {
        max-width: none;
    }
    
    .filter-bar {
        flex-direction: column;
    }
    
    .filter-item {
        width: 100%;
    }
    
    .filter-item .input,
    .filter-item .select {
        width: 100%;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th,
    .table td {
        padding: 8px;
    }
    
    .file-grid,
    .activity-grid {
        grid-template-columns: 1fr;
    }
    
    .pagination {
        justify-content: center;
    }
    
    .modal {
        width: 95%;
        max-height: 95vh;
    }
}

/* 动画 */
.fade-in {
    animation: fadeIn 0.3s ease;
}

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

.slide-up {
    animation: slideUp 0.3s ease;
}

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

/* 数字增长动画 */
.count-up {
    display: inline-block;
}