/* ===================================
   界面美化增强样式
   Enhanced UI Styles for Better UX
   =================================== */

/* ----- 动画效果 Animations ----- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

/* ----- 增强按钮样式 Enhanced Buttons ----- */
.btn-primary,
.btn-secondary,
.btn-success,
.btn-danger,
.btn-warning {
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.btn-primary::before,
.btn-secondary::before,
.btn-success::before,
.btn-danger::before,
.btn-warning::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn-primary:hover::before,
.btn-secondary:hover::before,
.btn-success:hover::before,
.btn-danger:hover::before,
.btn-warning:hover::before {
  width: 300px;
  height: 300px;
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: #fff;
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
  color: #fff;
}

.btn-warning:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
}

/* ----- 增强模态框样式 Enhanced Modals ----- */
.modal {
  animation: fadeIn 0.3s ease;
}

.modal-content {
  animation: scaleIn 0.4s ease;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-header {
  background: linear-gradient(135deg, var(--bg-dark) 0%, rgba(99, 102, 241, 0.1) 100%);
  border-radius: 20px 20px 0 0;
  padding: 20px 24px;
}

.modal-header h3 {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.close-btn,
.modal-close {
  transition: all 0.3s ease;
}

.close-btn:hover,
.modal-close:hover {
  transform: rotate(90deg);
  color: var(--danger);
}

/* ----- 增强状态徽章 Enhanced Status Badges ----- */
.status-badge {
  padding: 6px 14px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.status-badge:hover {
  transform: scale(1.05);
}

.status-badge.status-completed {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2) 0%, rgba(16, 185, 129, 0.1) 100%);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-badge.status-pending {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2) 0%, rgba(245, 158, 11, 0.1) 100%);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-badge.status-in_progress {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2) 0%, rgba(59, 130, 246, 0.1) 100%);
  color: #3b82f6;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.status-badge.status-terminated,
.status-badge.status-failed {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2) 0%, rgba(239, 68, 68, 0.1) 100%);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* ----- 增强空状态 Enhanced Empty State ----- */
.empty-state {
  text-align: center;
  padding: 80px 20px;
  color: var(--text-secondary);
  font-size: 16px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, rgba(99, 102, 241, 0.03) 100%);
  border-radius: 16px;
  border: 2px dashed var(--border);
  animation: fadeIn 0.6s ease;
}

.empty-state::before {
  content: '📭';
  display: block;
  font-size: 64px;
  margin-bottom: 20px;
  animation: bounce 2s infinite;
}

/* ----- 增强视图头部 Enhanced View Header ----- */
.view-header {
  animation: fadeInDown 0.6s ease;
}

.view-header h2 {
  position: relative;
  display: inline-block;
}

.view-header h2::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 2px;
}

/* ----- 增强卡片效果 Enhanced Cards ----- */
.group-card,
.task-card,
.document-card,
.knowledge-card,
.workflow-card,
.file-card {
  animation: fadeInUp 0.5s ease;
  animation-fill-mode: both;
}

.group-card:nth-child(1) { animation-delay: 0.1s; }
.group-card:nth-child(2) { animation-delay: 0.2s; }
.group-card:nth-child(3) { animation-delay: 0.3s; }
.group-card:nth-child(4) { animation-delay: 0.4s; }
.group-card:nth-child(5) { animation-delay: 0.5s; }
.group-card:nth-child(6) { animation-delay: 0.6s; }

/* ----- 增强表单样式 Enhanced Forms ----- */
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ----- 增强加载状态 Enhanced Loading ----- */
.loading {
  position: relative;
  color: var(--text-secondary);
}

.loading::after {
  content: '';
  display: inline-block;
  width: 20px;
  height: 20px;
  margin-left: 10px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ----- 响应式增强 Responsive Enhancements ----- */
@media (max-width: 900px) {
  .help-sections {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .task-detail-info {
    grid-template-columns: 1fr;
  }
  
  .members-table-header,
  .members-table-row {
    grid-template-columns: 1fr;
  }
  
  .backup-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .stats-grid,
  .backup-stats {
    grid-template-columns: 1fr;
  }
  
  .view-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .view-header > div {
    width: 100%;
  }
}

/* ----- 滚动条美化 Enhanced Scrollbar ----- */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 5px;
  transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

/* ----- 工具提示增强 Enhanced Tooltips ----- */
[title] {
  position: relative;
  cursor: help;
}

/* ----- 焦点可见性增强 Enhanced Focus Visibility ----- */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ----- 过渡效果优化 Optimized Transitions ----- */
* {
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ----- 打印样式优化 Print Styles ----- */
@media print {
  .sidebar,
  .nav-menu,
  .btn-logout,
  .modal,
  button {
    display: none !important;
  }
  
  .main-content {
    margin: 0;
    padding: 0;
  }
  
  .view-header h2::after {
    display: none;
  }
}