/* 移动端优先的样式设计 */
:root {
  --primary-color: #5e35b1;
  --primary-light: #9162e4;
  --primary-dark: #280680;
  --success-color: #4CAF50;
  --error-color: #f44336;
  --warning-color: #ff9800;
  --security-color: #ff5722;
  --text-color: #333;
  --text-light: #666;
  --background-color: #f5f5f5;
  --surface-color: #fff;
  --border-color: #e0e0e0;
  --border-radius: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 主容器 */
.file-upload-container {
  width: 100%;
  max-width: 500px;
  margin: 0 auto;
  padding: 16px;
}

/* 标题和描述 */
h2 {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 8px;
  color: var(--primary-dark);
}

.description {
  font-size: 0.95rem;
  text-align: center;
  margin-bottom: 24px;
  color: var(--text-light);
}

/* 上传表单 */
.upload-form {
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

/* 拖放区域 */
.drop-area {
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.drop-area:hover, .drop-area.dragging {
  border-color: var(--primary-color);
  background-color: rgba(94, 53, 177, 0.05);
}

.drop-icon {
  margin-bottom: 12px;
  color: var(--primary-color);
}

.drop-area p {
  font-size: 1rem;
  margin-bottom: 4px;
}

.file-types {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* 已选择文件 */
.selected-file {
  display: flex;
  align-items: center;
  background-color: rgba(94, 53, 177, 0.1);
  border-radius: var(--border-radius);
  padding: 10px 12px;
  margin-bottom: 16px;
}

.file-icon {
  background-color: var(--primary-color);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 12px;
}

.file-info {
  flex: 1;
  overflow: hidden;
}

.file-name {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}

.file-size {
  display: block;
  font-size: 0.75rem;
  color: var(--text-light);
}

.remove-btn {
  background: none;
  border: none;
  color: var(--text-light);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.remove-btn:hover {
  background-color: rgba(0, 0, 0, 0.1);
}

/* 过期设置 */
.expiry-setting {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
}

.expiry-setting label {
  font-size: 0.9rem;
  margin-right: 8px;
}

.expiry-setting select {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  background-color: white;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 16px;
}

/* 错误信息 */
.error-message {
  color: var(--error-color);
  font-size: 0.875rem;
  margin-bottom: 16px;
  padding: 8px 12px;
  border-radius: var(--border-radius);
  background-color: rgba(244, 67, 54, 0.1);
}

/* 操作按钮 */
.action-buttons {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.upload-btn, .camera-btn, .preview-btn, .share-btn, .reset-btn {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: var(--border-radius);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

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

.upload-btn:hover:not(:disabled) {
  background-color: var(--primary-dark);
}

.camera-btn {
  background-color: white;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.camera-btn:hover:not(:disabled) {
  background-color: rgba(94, 53, 177, 0.05);
}

.upload-btn:disabled, .camera-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* 上传进度 */
.progress-container {
  margin-top: 16px;
}

.progress-bar {
  height: 8px;
  background-color: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 6px;
}

.progress {
  height: 100%;
  background-color: var(--primary-color);
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.75rem;
  color: var(--text-light);
  display: block;
  text-align: right;
}

/* 上传成功视图 */
.success-view {
  background-color: var(--surface-color);
  border-radius: var(--border-radius);
  padding: 24px 20px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  text-align: center;
}

.success-icon {
  margin: 0 auto 16px;
  width: 64px;
  height: 64px;
}

.success-view h2 {
  margin-bottom: 8px;
}

.success-view p {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

/* 预览链接 */
.preview-link {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.preview-link input {
  flex: 1;
  padding: 12px;
  border: none;
  font-size: 0.85rem;
  outline: none;
}

.copy-btn {
  background-color: var(--primary-light);
  color: white;
  border: none;
  padding: 0 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 预览按钮 */
.preview-btn {
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
}

.preview-btn:hover {
  background-color: var(--primary-dark);
}

/* 分享按钮 */
.share-btn {
  background-color: white;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.share-btn:hover {
  background-color: rgba(94, 53, 177, 0.05);
}

/* 重置按钮 */
.reset-btn {
  width: 100%;
  background-color: white;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  margin-bottom: 16px;
}

.reset-btn:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

/* 过期信息 */
.expiry-info {
  font-size: 0.85rem;
  color: var(--text-light);
  padding: 12px 0;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.expiry-info::before {
  content: "⏱️";
  margin-right: 8px;
}

/* 隐私提示 */
.privacy-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 16px;
  line-height: 1.5;
}

/* 响应式调整 */
@media (min-width: 768px) {
  .file-upload-container {
    padding: 24px;
    max-width: 600px;
  }
  
  h2 {
    font-size: 1.75rem;
    margin-bottom: 12px;
  }
  
  .description {
    font-size: 1rem;
    margin-bottom: 28px;
  }
  
  .upload-form, .success-view {
    padding: 28px 32px;
  }
  
  .drop-area {
    padding: 36px 24px;
  }
  
  .action-buttons {
    gap: 16px;
  }
  
  .upload-btn, .camera-btn, .preview-btn, .share-btn, .reset-btn {
    padding: 14px;
    font-size: 1rem;
  }
}

/* 安全提醒区域 */
.security-note {
  display: flex;
  align-items: flex-start;
  background-color: rgba(255, 87, 34, 0.1);
  border-radius: var(--border-radius);
  padding: 14px;
  margin: 20px 0;
  border-left: 4px solid var(--security-color);
}

.security-icon {
  font-size: 1.5rem;
  margin-right: 12px;
  color: var(--security-color);
}

.security-note p {
  font-size: 0.9rem;
  color: var(--text-color);
  margin: 0;
  line-height: 1.5;
}

/* 增强成功图标 */
.success-icon {
  font-size: 3rem;
  color: var(--success-color);
  background-color: rgba(76, 175, 80, 0.1);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.4);
  }
  70% {
    transform: scale(1.05);
    box-shadow: 0 0 0 10px rgba(76, 175, 80, 0);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
  }
}

/* 阅后即焚视觉效果 */
.preview-btn::before {
  content: "🔍";
  margin-right: 8px;
}

.share-btn::before {
  content: "🔗";
  margin-right: 8px;
}

/* 暗黑主题支持 */
@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #9162e4;
    --primary-light: #b68ef0;
    --primary-dark: #5e35b1;
    --text-color: #e0e0e0;
    --text-light: #a0a0a0;
    --background-color: #121212;
    --surface-color: #1e1e1e;
    --border-color: #333;
    --security-color: #ff7043;
  }
  
  .drop-area:hover, .drop-area.dragging {
    background-color: rgba(145, 98, 228, 0.15);
  }
  
  .selected-file {
    background-color: rgba(145, 98, 228, 0.15);
  }
  
  .remove-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .error-message {
    background-color: rgba(244, 67, 54, 0.15);
  }
  
  .camera-btn, .share-btn, .reset-btn {
    background-color: #2c2c2c;
  }
  
  .camera-btn:hover:not(:disabled), .share-btn:hover, .reset-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
  }
  
  .progress-bar {
    background-color: #333;
  }
  
  .preview-link {
    border-color: #333;
  }
  
  .preview-link input {
    background-color: #2c2c2c;
    color: var(--text-color);
  }
  
  .expiry-setting select {
    background-color: #2c2c2c;
    color: var(--text-color);
    border-color: #333;
  }
  
  .security-note {
    background-color: rgba(255, 87, 34, 0.15);
  }
  
  .success-icon {
    background-color: rgba(76, 175, 80, 0.15);
  }
}

.auto-preview-setting {
  margin: 10px 0;
  display: flex;
  align-items: center;
}

.auto-preview-setting label {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-color);
}

.auto-preview-setting input[type="checkbox"] {
  margin-right: 8px;
  width: 16px;
  height: 16px;
  accent-color: var(--primary-color);
}