/* ================================================
   DocScan - 智能文档内容提取工具样式
   ================================================ */

/* CSS 变量定义 */
:root {
  /* 颜色系统 */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-primary-alpha: rgba(99, 102, 241, 0.1);

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  --color-bg-base: #f8fafc;
  --color-bg-card: #ffffff;
  --color-bg-hover: #f1f5f9;
  --color-bg-active: #e2e8f0;

  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94a3b8;
  --color-text-inverse: #ffffff;

  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  /* 字体 */
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.03);

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* 布局 */
  --container-max: 1200px;
  --header-height: 64px;
}

/* 重置样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg-base);
  color: var(--color-text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ================================================
   应用容器
   ================================================ */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ================================================
   头部导航
   ================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}

.header-content {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ================================================
   主内容区
   ================================================ */
.main-content {
  flex: 1;
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* ================================================
   上传区域
   ================================================ */
.upload-section {
  width: 100%;
}

.upload-zone {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  background: var(--color-bg-card);
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    var(--color-primary-alpha) 0%,
    rgba(99, 102, 241, 0.05) 50%,
    rgba(99, 102, 241, 0.02) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.upload-zone:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.upload-zone:hover::before {
  opacity: 1;
}

.upload-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-alpha);
  transform: scale(1.01);
}

.upload-zone.drag-over::before {
  opacity: 1;
}

.upload-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-md);
}

.upload-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-alpha);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  transition: transform var(--transition-base);
}

.upload-zone:hover .upload-icon {
  transform: translateY(-4px);
}

.upload-icon svg {
  width: 32px;
  height: 32px;
}

.upload-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.upload-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
}

.upload-formats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.format-tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-bg-hover);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.upload-zone:hover .format-tag {
  background: var(--color-primary-alpha);
  color: var(--color-primary);
}

/* ================================================
   按钮样式
   ================================================ */
.btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--color-bg-active);
  color: var(--color-error);
}

.btn-icon svg {
  width: 20px;
  height: 20px;
}

.btn-text {
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-primary {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.btn-primary svg {
  width: 16px;
  height: 16px;
}

/* ================================================
   文件列表区域
   ================================================ */
.file-list-section {
  display: none;
}

.file-list-section.active {
  display: block;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.file-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 var(--spacing-sm);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}

.section-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* ================================================
   文件卡片
   ================================================ */
.file-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: all var(--transition-base);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.file-card-header {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  gap: var(--spacing-md);
  cursor: pointer;
  user-select: none;
}

.file-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.file-icon.image { background: #fef3c7; color: #f59e0b; }
.file-icon.pdf { background: #fee2e2; color: #ef4444; }
.file-icon.doc { background: #dbeafe; color: #3b82f6; }
.file-icon.xls { background: #d1fae5; color: #10b981; }
.file-icon.ppt { background: #fce7f3; color: #ec4899; }
.file-icon.txt { background: #f3f4f6; color: #6b7280; }
.file-icon.zip { background: #e0e7ff; color: #6366f1; }

.file-icon svg {
  width: 20px;
  height: 20px;
}

.file-info {
  flex: 1;
  min-width: 0;
}

.file-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

.file-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.file-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.file-status-badge.pending {
  background: var(--color-bg-hover);
  color: var(--color-text-tertiary);
}

.file-status-badge.processing {
  background: #fef3c7;
  color: #d97706;
}

.file-status-badge.success {
  background: #d1fae5;
  color: #059669;
}

.file-status-badge.error {
  background: #fee2e2;
  color: #dc2626;
}

.file-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.file-action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.file-action-btn:hover {
  background: var(--color-bg-hover);
  color: var(--color-text-primary);
}

.file-action-btn.delete:hover {
  background: #fee2e2;
  color: var(--color-error);
}

.file-action-btn svg {
  width: 16px;
  height: 16px;
}

.expand-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  transition: transform var(--transition-fast);
}

.expand-icon svg {
  width: 16px;
  height: 16px;
}

.file-card.expanded .expand-icon {
  transform: rotate(180deg);
}

.file-card-content {
  display: none;
  border-top: 1px solid var(--color-border-light);
}

.file-card.expanded .file-card-content {
  display: block;
}

.file-preview {
  padding: var(--spacing-md);
  background: var(--color-bg-hover);
}

.preview-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.preview-content {
  max-height: 300px;
  overflow: auto;
  padding: var(--spacing-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}

.preview-content:empty::before {
  content: '暂无内容';
  color: var(--color-text-tertiary);
  font-style: italic;
}

/* ================================================
   结果区域
   ================================================ */
.results-section {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.results-container {
  padding: var(--spacing-lg);
  min-height: 300px;
}

.results-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-2xl);
  text-align: center;
  color: var(--color-text-tertiary);
}

.results-placeholder svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.results-placeholder p {
  font-size: 0.875rem;
}

.result-item {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  background: var(--color-bg-hover);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
}

.result-item:last-child {
  margin-bottom: 0;
}

.result-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.result-item-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.result-item-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.result-item-content {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 200px;
  overflow: auto;
  padding: var(--spacing-md);
  background: var(--color-bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-light);
}

/* ================================================
   加载状态
   ================================================ */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.loading-overlay.active {
  opacity: 1;
  visibility: visible;
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  min-width: 280px;
}

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

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

.loading-text {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--color-bg-hover);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: 2px;
  transition: width var(--transition-fast);
  width: 0%;
}

/* ================================================
   Toast 通知
   ================================================ */
.toast-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  animation: toastIn 0.3s ease;
}

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

.toast.leaving {
  animation: toastOut 0.3s ease forwards;
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.toast.success .toast-icon { color: var(--color-success); }
.toast.error .toast-icon { color: var(--color-error); }
.toast.info .toast-icon { color: var(--color-primary); }

.toast-message {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

/* ================================================
   响应式设计
   ================================================ */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
  }

  .header-content {
    padding: 0 var(--spacing-md);
  }

  .main-content {
    padding: var(--spacing-md);
    gap: var(--spacing-md);
  }

  .upload-zone {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .upload-icon {
    width: 48px;
    height: 48px;
  }

  .upload-icon svg {
    width: 24px;
    height: 24px;
  }

  .upload-title {
    font-size: 1rem;
  }

  .upload-formats {
    gap: 6px;
  }

  .format-tag {
    font-size: 0.6875rem;
    padding: 2px 6px;
  }

  .section-header {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .section-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .file-card-header {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .file-icon {
    width: 36px;
    height: 36px;
  }

  .file-name {
    font-size: 0.8125rem;
  }

  .results-container {
    padding: var(--spacing-md);
  }

  .toast-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
    bottom: var(--spacing-md);
  }

  .toast {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .logo-text {
    font-size: 1rem;
  }

  .file-card-header {
    gap: var(--spacing-sm);
  }

  .file-info {
    display: flex;
    flex-direction: column;
  }

  .file-meta {
    display: none;
  }

  .btn-text {
    font-size: 0.75rem;
    padding: 4px 8px;
  }

  .btn-primary {
    font-size: 0.75rem;
    padding: 6px 10px;
  }
}

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

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

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

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

/* ================================================
   辅助类
   ================================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}