/**
 * 英语作文批改助手 主CSS文件
 * 版本: 1.0.0
 * 日期: 2023-08-10
 * 描述: 提供全站通用样式和重写
 */

/* 全局样式 */
body, html {
  margin: 0 !important; 
  padding: 0 !important;
  min-height: 100vh;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* 主要颜色变量 */
:root {
  --primary-color: #4a6cf7;
  --secondary-color: #6c757d;
  --success-color: #10b981;
  --info-color: #54b4d3;
  --warning-color: #fbbf24;
  --danger-color: #ef4444;
}

/* 常用辅助类 */
.text-primary {
  color: var(--primary-color) !important;
}

.text-success {
  color: var(--success-color) !important;
}

.text-info {
  color: var(--info-color) !important;
}

.text-warning {
  color: var(--warning-color) !important;
}

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

/* 页面标题样式 */
.page-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

/* 表单样式增强 */
.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(74, 108, 247, 0.25);
}

/* 保留数字输入框的三角形按钮，但禁用滚轮和键盘滚动 */
/* 强制显示数字输入框的三角形按钮 */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: auto !important;
    margin: 0;
    opacity: 1 !important;
}

/* Firefox - 恢复默认外观 */
input[type="number"] {
    -moz-appearance: auto !important;
}

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

.btn-primary:hover,
.btn-primary:focus {
  background-color: #3a56d7;
  border-color: #3a56d7;
}

/* 辅助间距类 */
.mt-6 {
  margin-top: 4rem !important;
}

.mb-6 {
  margin-bottom: 4rem !important;
}

.py-6 {
  padding-top: 4rem !important;
  padding-bottom: 4rem !important;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .display-4 {
    font-size: 2.5rem;
  }
  
  .lead {
    font-size: 1.1rem;
  }
}

/* 任务卡片样式 */
.task-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.task-card {
  position: relative;
  transition: all 0.2s ease;
  border-top: 3px solid #e0e0e0;
  border-radius: 4px;
  overflow: hidden;
}

.task-card.status-active {
  border-top-color: #28a745;
}

.task-card.status-completed {
  border-top-color: #007bff;
}

.task-card.status-pending {
  border-top-color: #ffc107;
}

.task-card.status-expired {
  border-top-color: #dc3545;
}

.task-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1) !important;
}

.task-card .card-body {
  padding: 0.75rem; 
}

.task-card .card-footer {
  padding: 0;
  background-color: #f8f9fa;
  border-top: 1px solid #eaeaea;
}

.task-card .card-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
  line-height: 1.3;
}

.task-checkbox-wrapper {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 1;
}

/* 统计信息盒子 */
.stat-box {
  background-color: #f8f9fa;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.stat-box:hover {
  background-color: #e9ecef;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1;
  color: #343a40;
}

.stat-label {
  font-size: 0.7rem;
  color: #6c757d;
  margin-top: 0.15rem;
}

.task-meta {
  margin-bottom: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.task-meta .badge {
  font-size: 0.7rem;
  font-weight: 500;
}

.task-stats {
  display: flex;
  justify-content: space-around;
  margin-bottom: 0.5rem;
}

.task-stat-item {
  text-align: center;
  display: flex;
  flex-direction: column;
}

.task-stat-value {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
}

.task-stat-label {
  font-size: 0.7rem;
  color: #6c757d;
}

.task-essay-stats {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.3rem;
  font-size: 0.75rem;
}

.task-essay-item {
  text-align: center;
  display: flex;
  flex-direction: column;
}

.task-essay-value {
  font-weight: 600;
  font-size: 0.9rem;
}

.task-progress {
  height: 0.5rem;
  margin-bottom: 0.5rem;
}

.task-deadline {
  color: #dc3545;
  font-weight: 500;
}

/* 首页任务卡片样式 */
.home-task-card {
  background-color: #ffffff;
  border-radius: 12px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: 1.25rem;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.home-task-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06);
}

.home-task-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 0.75rem;
}

.home-task-meta {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: #666;
}

.home-task-count {
  background-color: #f5f7ff;
  color: #4a6bdf;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  flex-shrink: 0;
}

.home-task-date {
  margin-left: auto;
  display: flex;
  align-items: center;
}

.home-task-date i {
  margin-right: 0.25rem;
  color: #4a6bdf;
}

.home-task-actions {
  margin-top: auto;
  display: flex;
  gap: 0.5rem;
}

.home-task-actions .btn {
  flex: 1;
  border-radius: 8px;
  font-size: 0.875rem;
  padding: 0.5rem 1rem;
  transition: all 0.2s;
}

.home-task-actions .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
}

.home-task-status {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

.home-task-status-badge {
  padding: 0.35rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 500;
}

.home-task-status-badge.active {
  background-color: rgba(40, 167, 69, 0.15);
  color: #1e7e34;
}

.home-task-status-badge.pending {
  background-color: rgba(255, 193, 7, 0.15);
  color: #d39e00;
}

.home-task-description {
  color: #777;
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

/* 任务卡片进度条 */
.home-task-progress {
  height: 6px;
  background-color: #f0f0f0;
  border-radius: 10px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.home-task-progress-bar {
  height: 100%;
  border-radius: 10px;
  background: linear-gradient(90deg, #4a6bdf, #5e7ef7);
}

/* loading-overlay样式设置 */
#loading-overlay {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba(255,255,255,0.9);
    z-index: 999 !important; /* 确保比导航栏(1050)低 */
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none !important; /* 强制允许鼠标事件穿透 */
}

#loading-overlay .text-center {
    pointer-events: auto; /* 加载指示器本身可以接收鼠标事件 */
}

/* 导航栏修复 */
.navbar {
    position: relative; /* 改为相对定位 */
    z-index: 1060 !important;
    margin-bottom: 0 !important;
}

/* 移除导航栏下方可能存在的间距 */
body > main {
    padding-top: 0 !important;
    margin-top: 0 !important;
}

.container.mt-4 {
    margin-top: 0 !important; /* 移除顶部外边距 */
}

/* 确保z-index层级正确 */
.navbar, .navbar-nav, .nav-item, .nav-link {
    position: relative;
    z-index: 1060 !important; /* 确保导航栏元素在最高层 */
}

.navbar .dropdown-menu {
    z-index: 1061 !important; /* 确保下拉菜单显示在导航栏上层 */
}

.dropdown-toggle::after {
    z-index: 1060 !important; /* 确保下拉箭头可点击 */
    position: relative;
}

/* 提高页面内任何模态框的z-index，防止它们遮挡导航栏 */
.modal {
    z-index: 1055 !important; /* 低于导航栏，但高于其他内容 */
}

/* 移除模态框背景遮罩，使用透明背景 */
.modal-backdrop {
    background-color: transparent !important; /* 透明背景，不阻挡交互 */
    opacity: 0 !important; /* 完全透明 */
}

/* 确保模态框打开时body不会被锁定 */
body.modal-open {
    overflow: auto !important; /* 允许滚动 */
    padding-right: 0 !important; /* 移除右边距 */
}

/* 为模态框添加边框和阴影，替代背景遮罩的视觉效果 */
.modal-content {
    border: 2px solid #dee2e6 !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3) !important;
    border-radius: 8px !important;
}

/* 确保其他可能的覆盖元素不会干扰导航栏 */
.floating-tip, .toast, .popover, .tooltip {
    z-index: 1059 !important; /* 高于大多数内容，但低于导航栏 */
}

/* 移除main容器的顶部间距 */
main {
    padding-top: 0 !important;
    margin-top: 0 !important;
}

/* 确保页面内容跟随导航栏 */
.main-content, main.flex-shrink-0 {
    padding-top: 0 !important;
}

/* 用户信息和退出登录按钮样式 */
.navbar .nav-link.btn-outline-light {
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
    font-weight: 500;
    border-radius: 4px;
}

.navbar .nav-link.btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.8);
}

/* 用户名和角色信息样式 */
.navbar .text-white {
    font-weight: 500;
    letter-spacing: 0.3px;
}

.navbar .badge {
    font-weight: 500;
    padding: 0.25em 0.6em;
    border-radius: 4px;
}

/* 学生匹配界面的学生推荐卡片 */
.student-chip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  margin-bottom: 8px;
  border-radius: 6px;
  background-color: #f8f9fa;
  border: 1px solid #dee2e6;
  transition: all 0.2s ease;
}

.student-chip:hover {
  background-color: #e9ecef;
  cursor: pointer;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.student-chip .student-info {
  display: flex;
  flex-direction: column;
}

.student-chip .student-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.student-chip .student-id {
  font-size: 0.8rem;
  color: #6c757d;
}

.student-chip .score-container {
  display: flex;
  align-items: center;
  gap: 4px;
}

.student-chip .match-score {
  font-size: 0.75rem;
  font-weight: 600;
}

/* 选中状态样式 */
.student-chip.selected-student {
  background-color: #e0f2fe;
  border: 2px solid #0d6efd;
  position: relative;
  box-shadow: 0 4px 8px rgba(13, 110, 253, 0.25);
  transform: translateY(-3px);
  /* 增加左侧边框突出显示 */
  border-left: 6px solid #0d6efd !important;
  /* 添加边框发光效果 */
  outline: 2px solid rgba(13, 110, 253, 0.3);
}

.student-chip.selected-student:hover {
  background-color: #d0e8ff;
}

.student-chip.selected-student::after {
  content: '✓';
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  background-color: #0d6efd;
  color: white;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: bold;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.student-chip .selected-icon {
  color: #0d6efd;
  font-size: 1.1rem;
  margin-left: 8px;
  /* 添加动画效果 */
  animation: pulse 1.2s infinite;
}

/* 添加已选择文本的样式 */
.student-chip .selected-text {
  display: inline-block;
  color: #0d6efd !important;
  font-weight: bold !important;
  font-size: 0.75rem;
  margin-top: 4px;
  padding: 1px 6px;
  background-color: rgba(13, 110, 253, 0.1);
  border-radius: 3px;
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 添加脉冲动画 */
@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}

/* 按钮脉冲动画样式 */
.btn-pulse {
  animation: btnPulse 1.5s infinite;
  box-shadow: 0 0 0 0 rgba(13, 110, 253, 0.7);
}

@keyframes btnPulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(13, 110, 253, 0.7);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 0 0 10px rgba(13, 110, 253, 0);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(13, 110, 253, 0);
  }
}

/* 箭头指示器弹跳动画 */
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* 高置信度样式 */
.student-chip.high-confidence {
  border-left: 4px solid #198754;
}

.student-chip.medium-high-confidence {
  border-left: 4px solid #0dcaf0;
}

.student-chip.medium-confidence {
  border-left: 4px solid #0d6efd;
}

.student-chip.medium-low-confidence {
  border-left: 4px solid #ffc107;
}

.student-chip.low-confidence {
  border-left: 4px solid #6c757d;
}

/* 最佳匹配样式 */
.student-chip.best-match {
  background-color: #f0f8ff;
}

/* CSRF保护和表单恢复样式 */
.form-restored {
    background-color: #fff3cd !important;
    border-color: #ffeaa7 !important;
    transition: all 0.3s ease;
}

.form-restored:focus {
    background-color: #ffffff !important;
    border-color: #007bff !important;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25) !important;
}

/* CSRF过期提示样式 */
.csrf-expired-notice {
    background: linear-gradient(135deg, #ffeaa7 0%, #fdcb6e 100%);
    border: 1px solid #e17055;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 20px;
    animation: slideInDown 0.5s ease-out;
}

.csrf-expired-notice .icon {
    font-size: 1.2em;
    color: #d63031;
}

/* 表单数据恢复动画 */
@keyframes formRestore {
    0% {
        background-color: #fff3cd;
        transform: scale(1.02);
    }
    50% {
        background-color: #ffeaa7;
    }
    100% {
        background-color: #fff3cd;
        transform: scale(1);
    }
}

.form-restored {
    animation: formRestore 1s ease-in-out;
}

/* 恢复提示消息样式 */
.restore-message {
    background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    animation: slideInDown 0.5s ease-out;
}

.restore-message .close {
    color: white;
    opacity: 0.8;
}

.restore-message .close:hover {
    opacity: 1;
}

/* 加载状态样式 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-spinner {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* 滑入动画 */
@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

/* CSRF错误页面样式增强 */
.csrf-error-card {
    border: 2px solid #ffc107;
    box-shadow: 0 8px 25px rgba(255, 193, 7, 0.15);
    transition: all 0.3s ease;
}

.csrf-error-card:hover {
    box-shadow: 0 12px 35px rgba(255, 193, 7, 0.25);
    transform: translateY(-2px);
}

.csrf-error-icon {
    font-size: 3rem;
    color: #ffc107;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 按钮增强样式 */
.btn-enhanced {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn-enhanced:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-enhanced:hover:before {
    left: 100%;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .csrf-expired-notice {
        padding: 10px;
        font-size: 0.9em;
    }
    
    .restore-message {
        padding: 10px 15px;
        font-size: 0.9em;
    }
    
    .form-restored {
        font-size: 0.9em;
    }
}