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1024px){.sidebar{display:none}}@media (max-width: 640px){.main-content{padding:1rem}header h1{font-size:1.8rem}.dropzone{padding:2rem 1rem}}.options-row{margin-top:1rem;padding:.75rem;background:var(--surface-alt, #f0f2f5);border-radius:8px;border:1px solid var(--border, #e0e0e0)}.toggle-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;font-size:.9rem;color:var(--text, #333)}.toggle-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--blue-400, #2196f3);cursor:pointer}.toggle-text{display:flex;align-items:center;gap:.4rem}.toggle-text i{color:var(--blue-400, #2196f3)}.mode-tabs{display:flex;gap:.5rem;justify-content:center;margin:0 0 1.5rem}.mode-tab{display:inline-flex;align-items:center;gap:.5rem;padding:.6rem 1.2rem;border:1px solid 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