/* ========================================
   图片格式转换/压缩工具样式
   ======================================== */

.main-content { width: 100%; max-width: 1100px; height: calc(100vh - 120px); display: flex; align-items: center; padding: 0 20px; padding-bottom: 50px; z-index: 10; overflow-y: auto; }
.container { width: 100%; }
.tool-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-xl); overflow: hidden; width: 100%; box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3); }

/* 工具栏 */
.toolbar { padding: 12px 16px; border-bottom: 1px solid var(--border-color); background: rgba(0,0,0,0.2); display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.actions-left, .actions-right { display: flex; gap: 8px; align-items: center; }
.select-label { display: flex; align-items: center; gap: 6px; color: var(--text-secondary); font-size: 13px; }
.format-select { padding: 4px 10px; border-radius: 6px; border: 1px solid var(--border-color); background: var(--bg-card); color: var(--text-primary); font-size: 13px; outline: none; }
.quality-range { width: 80px; accent-color: var(--primary-color); }
.quality-label { color: var(--primary-color); font-weight: 600; font-size: 13px; min-width: 36px; }
.btn-action { padding: 6px 12px; border-radius: var(--radius-md); border: 1px solid var(--border-color); background: rgba(255,255,255,0.05); color: var(--text-secondary); cursor: pointer; font-size: 13px; display: flex; align-items: center; gap: 6px; transition: 0.2s; }
.btn-action:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
.btn-action:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-action.btn-blue { background: rgba(59,130,246,0.2); border-color: rgba(59,130,246,0.4); color: #60a5fa; }
.btn-action.btn-green { background: rgba(34,197,94,0.2); border-color: rgba(34,197,94,0.4); color: #4ade80; }

/* 上传区 */
.upload-section { padding: 30px 20px; }
.drop-zone { border: 2px dashed var(--border-color-hover); border-radius: var(--radius-lg); padding: 40px 20px; text-align: center; cursor: pointer; transition: 0.3s; }
.drop-zone:hover, .drop-zone.drag-over { border-color: var(--primary-color); background: var(--primary-light); }
.drop-zone > i { font-size: 40px; color: var(--text-muted); margin-bottom: 12px; display: block; }
.drop-zone p { color: var(--text-secondary); font-size: 14px; }
.drop-zone .hint { font-size: 12px; color: var(--text-muted); margin-top: 6px; }
.drop-zone .link { color: var(--primary-color); text-decoration: underline; cursor: pointer; }

/* 预览区 */
.preview-section { padding: 20px; border-top: 1px solid var(--border-color); }
.preview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.preview-col { display: flex; flex-direction: column; gap: 8px; }
.preview-label { font-size: 12px; color: var(--text-muted); font-weight: 600; }
.preview-box { background: rgba(0,0,0,0.3); border-radius: var(--radius-md); overflow: hidden; min-height: 150px; display: flex; align-items: center; justify-content: center; }
.preview-box img { max-width: 100%; max-height: 300px; object-fit: contain; }
.file-info { font-size: 12px; color: var(--text-muted); padding: 4px 0; }

/* 尺寸调整 */
.resize-section { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border-color); }
.resize-controls { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.resize-label { display: flex; flex-direction: column; gap: 4px; color: var(--text-secondary); font-size: 12px; }
.resize-input { width: 80px; padding: 4px 8px; border-radius: 6px; border: 1px solid var(--border-color); background: var(--bg-card); color: var(--text-primary); font-size: 13px; outline: none; font-family: var(--font-mono); }
.toggle-option { display: flex; align-items: center; gap: 6px; cursor: pointer; color: var(--text-secondary); font-size: 13px; user-select: none; }
.toggle-option input { accent-color: var(--primary-color); }

/* 错误条 */
.error-bar { padding: 8px 16px; background: rgba(239,68,68,0.1); border-top: 1px solid rgba(239,68,68,0.2); color: #f87171; font-size: 12px; display: flex; align-items: center; gap: 8px; }
.error-bar.hidden { display: none; }

@media (max-width: 768px) {
    .preview-grid { grid-template-columns: 1fr; }
    .toolbar { flex-direction: column; }
}