/* ========================================
   2ceyan - 统一设计规范
   ======================================== */

/* ----------------------------------------
   1. CSS 变量 (Design Tokens)
   ---------------------------------------- */
:root {
  /* 主色调 */
  --color-primary: #1890ff;
  --color-primary-hover: #40a9ff;
  --color-primary-active: #096dd9;
  --color-primary-light: #e6f7ff;
  --color-primary-border: #91d5ff;

  /* 语义色 - 状态 */
  --color-success: #52c41a;
  --color-success-light: #f6ffed;
  --color-success-border: #b7eb8f;
  
  --color-warning: #faad14;
  --color-warning-light: #fffbe6;
  --color-warning-border: #ffe58f;
  
  --color-error: #ff4d4f;
  --color-error-light: #fff1f0;
  --color-error-border: #ffa39e;

  --color-orange: #fa8c16;
  --color-orange-light: #fff7e6;
  --color-orange-border: #ffd591;

  /* 中性色 */
  --color-text: #333;
  --color-text-secondary: #666;
  --color-text-muted: #999;
  --color-text-disabled: #bfbfbf;
  
  --color-bg: #f0f2f5;
  --color-bg-light: #fafafa;
  --color-bg-white: #fff;
  
  --color-border: #d9d9d9;
  --color-border-light: #f0f0f0;
  --color-divider: #e8e8e8;

  /* 侧边栏 */
  --color-sidebar-bg: #001529;
  --color-sidebar-text: rgba(255, 255, 255, 0.65);
  --color-sidebar-active: #1890ff;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-xxl: 32px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.15);

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-xxl: 24px;
  --font-size-title: 28px;

  /* 动画 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* 层级 */
  --z-dropdown: 100;
  --z-modal: 1000;
  --z-toast: 2000;
}

/* ----------------------------------------
   2. 基础重置
   ---------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ----------------------------------------
   3. 工具类
   ---------------------------------------- */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-primary { color: var(--color-primary); }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* ----------------------------------------
   4. 按钮组件
   ---------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 8px 16px;
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-bg-white);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}
.btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn:active {
  transform: scale(0.98);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-success {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}
.btn-success:hover {
  background: #73d13d;
  border-color: #73d13d;
  color: #fff;
}

.btn-danger {
  background: var(--color-error);
  border-color: var(--color-error);
  color: #fff;
}
.btn-danger:hover {
  background: #ff7875;
  border-color: #ff7875;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--color-bg);
}

.btn-sm {
  padding: 4px 10px;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 12px 24px;
  font-size: var(--font-size-md);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ----------------------------------------
   5. 表单组件
   ---------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 8px 12px;
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px var(--color-primary-light);
}

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

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

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-hint {
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.form-row {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  align-items: flex-end;
}

/* ----------------------------------------
   6. 卡片组件
   ---------------------------------------- */
.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
}

.card-title {
  margin: 0;
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-text);
}

.card-body {
  /* content area */
}

.card-clickable {
  cursor: pointer;
  transition: all var(--transition-fast);
}
.card-clickable:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.card-clickable:active {
  transform: translateY(0);
}

.card-selected {
  border: 2px solid var(--color-primary);
  background: var(--color-primary-light);
}

/* ----------------------------------------
   7. 状态标签
   ---------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  border: 1px solid;
}

.tag-default {
  background: var(--color-bg);
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

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

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

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

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

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

/* 学生状态专用 */
.status-pending {
  background: var(--color-bg);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}

.status-passed {
  background: var(--color-success-light);
  border-color: var(--color-success-border);
  color: var(--color-success);
}

.status-failed_need_retest,
.status-retest {
  background: var(--color-orange-light);
  border-color: var(--color-orange-border);
  color: var(--color-orange);
}

.status-absent_unfinished {
  background: var(--color-error-light);
  border-color: var(--color-error-border);
  color: var(--color-error);
}

/* ----------------------------------------
   8. 表格组件
   ---------------------------------------- */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
  font-size: var(--font-size-base);
}

.table th {
  background: var(--color-bg-light);
  font-weight: 500;
  color: var(--color-text-secondary);
}

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

.table-compact th,
.table-compact td {
  padding: var(--spacing-sm) var(--spacing-md);
}

/* ----------------------------------------
   9. 模态框
   ---------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  animation: fadeIn var(--transition-fast);
}

.modal {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  width: 520px;
  max-width: 100%;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  animation: slideUp var(--transition-normal);
}

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

.modal-title {
  font-size: var(--font-size-md);
  font-weight: 600;
  margin: 0;
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
}

/* ----------------------------------------
   10. Toast 消息
   ---------------------------------------- */
#toast-container {
  position: fixed;
  top: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  padding: var(--spacing-md) var(--spacing-xl);
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  box-shadow: var(--shadow-lg);
  animation: slideDown var(--transition-normal);
}

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

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

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

/* ----------------------------------------
   11. 空状态
   ---------------------------------------- */
.empty-state {
  text-align: center;
  padding: var(--spacing-xxl);
  color: var(--color-text-muted);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state-text {
  font-size: var(--font-size-base);
}

/* ----------------------------------------
   12. 步骤指示器
   ---------------------------------------- */
.steps {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.step {
  flex: 1;
  text-align: center;
}

.step-number {
  width: 32px;
  height: 32px;
  margin: 0 auto var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  color: var(--color-text-muted);
  font-weight: 600;
  transition: all var(--transition-fast);
}

.step-title {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.step.active .step-number {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.step.active .step-title {
  color: var(--color-primary);
  font-weight: 600;
}

.step.completed .step-number {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}

.step.completed .step-title {
  color: var(--color-success);
}

/* ----------------------------------------
   13. 进度指示器（底部圆点）
   ---------------------------------------- */
.progress-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
}

.progress-dot {
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.progress-dot:hover {
  background: var(--color-text-muted);
}

.progress-dot.active {
  background: var(--color-primary);
  transform: scale(1.2);
}

.progress-dot.done {
  background: var(--color-success);
}

.progress-dot.failed {
  background: var(--color-error);
}

/* ----------------------------------------
   14. 指引卡片
   ---------------------------------------- */
.guide-card {
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #f0f9ff 100%);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.guide-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.guide-step {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.guide-step-num {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.guide-step-text {
  color: var(--color-text-secondary);
  line-height: 24px;
}

/* ----------------------------------------
   15. 快捷入口网格
   ---------------------------------------- */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.quick-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.quick-action:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.quick-action-icon {
  font-size: 32px;
  margin-bottom: var(--spacing-sm);
}

.quick-action-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
}

.quick-action-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--spacing-xs);
}

.quick-action-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.quick-action-primary .quick-action-title,
.quick-action-primary .quick-action-desc {
  color: #fff;
}

.quick-action-primary:hover {
  background: var(--color-primary-hover);
}

/* ----------------------------------------
   16. 动画
   ---------------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

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

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

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.animate-fadeIn { animation: fadeIn var(--transition-normal); }
.animate-slideUp { animation: slideUp var(--transition-normal); }
.animate-pulse { animation: pulse 2s infinite; }

/* ----------------------------------------
   17. 响应式断点
   ---------------------------------------- */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 16px;
    --spacing-xxl: 24px;
  }

  .card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
  }

  .quick-actions {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    flex-direction: column;
  }

  .form-row > * {
    width: 100%;
  }

  .table th,
  .table td {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  .steps {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .step {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-align: left;
  }

  .step-number {
    margin: 0;
  }

  .modal {
    width: 100%;
    max-height: 80vh;
    margin: auto var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .quick-actions {
    grid-template-columns: 1fr;
  }

  .btn-block-mobile {
    display: flex;
    width: 100%;
  }
}

/* ----------------------------------------
   18. 加载状态
   ---------------------------------------- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--color-text-muted);
}

.loading::before {
  content: "";
  width: 20px;
  height: 20px;
  margin-right: var(--spacing-sm);
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.skeleton {
  background: linear-gradient(90deg, var(--color-bg) 25%, var(--color-bg-light) 50%, var(--color-bg) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}