/* PDF 工具页面通用样式 */

:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --glass-bg: rgba(255, 255, 255, 0.95);
  --glass-border: rgba(255, 255, 255, 0.2);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a68;
  --accent-color: #667eea;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--primary-gradient);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
}

/* 导航栏 */
.navbar {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.navbar-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
}

.navbar-nav {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.navbar-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.navbar-nav a:hover {
  color: var(--accent-color);
}

/* 主容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* 页面标题 */
.page-header {
  text-align: center;
  margin-bottom: 3rem;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.page-description {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
}

/* 卡片样式 */
.card {
  background: var(--glass-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 1.5rem;
  border: 1px solid var(--glass-border);
}

.card-header {
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.card-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* 工具分类标题 */
.tools-category {
  margin: 3rem 0 1.5rem 0;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.3);
}

.tools-category-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: white;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tools-category-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 1.5rem;
  background: var(--accent-color);
  border-radius: 2px;
}

/* 工具网格 */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.tool-card {
  background: var(--glass-bg);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.tool-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.tool-card:hover::before {
  transform: scaleX(1);
}

.tool-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1rem;
  color: white;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.tool-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.tool-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1rem;
  line-height: 1.5;
  flex-grow: 1;
}

.tool-features {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

.tool-feature {
  background: rgba(102, 126, 234, 0.1);
  color: var(--accent-color);
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* 上传区域 */
.upload-area {
  border: 2px dashed rgba(102, 126, 234, 0.3);
  border-radius: var(--radius-lg);
  padding: 3rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  background: rgba(255, 255, 255, 0.5);
}

.upload-area:hover,
.upload-area.drag-over {
  border-color: var(--accent-color);
  background: rgba(102, 126, 234, 0.05);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.upload-text {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.upload-hint {
  color: var(--text-secondary);
  font-size: 0.9rem;
  opacity: 0.7;
}

/* 文件列表 */
.file-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.file-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.file-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 0.8rem;
}

.file-info {
  flex: 1;
}

.file-name {
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.file-size {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.file-remove {
  background: none;
  border: none;
  color: var(--error-color);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 1.2rem;
  transition: transform 0.2s ease;
}

.file-remove:hover {
  transform: scale(1.1);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: white;
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
  background: rgba(0, 0, 0, 0.02);
}

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

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

/* 表单元素 */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  background: white;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

/* 页码选择器 */
.page-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.page-option {
  padding: 0.5rem 1rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  background: white;
}

.page-option:hover {
  border-color: var(--accent-color);
}

.page-option.selected {
  background: var(--primary-gradient);
  color: white;
  border-color: transparent;
}

/* 结果区域 */
.result-area {
  margin-top: 2rem;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.result-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.result-content {
  background: white;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

/* PDF 信息展示 */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.info-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.info-value {
  font-weight: 600;
  color: var(--text-primary);
}

/* 文本预览 */
.text-preview {
  background: #f8f9fa;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  max-height: 400px;
  overflow-y: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}

/* 图片预览网格 */
.image-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.image-preview-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: white;
  box-shadow: var(--shadow-sm);
}

.image-preview-item img {
  width: 100%;
  height: auto;
  display: block;
}

.image-preview-item button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: white;
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 加载状态 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* 提示信息 */
.alert {
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning-color);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* 页脚 */
.footer {
  text-align: center;
  padding: 2rem;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .navbar-content {
    flex-direction: column;
    gap: 1rem;
  }

  .navbar-nav {
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .container {
    padding: 1rem;
  }

  .page-title {
    font-size: 1.8rem;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .upload-area {
    padding: 2rem 1rem;
  }

  .file-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .file-remove {
    align-self: flex-end;
  }
}

/* 动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: rgba(102, 126, 234, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(102, 126, 234, 0.5);
}