.sec-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 20px; }
            .sec-panel { border: 2px dashed var(--border-color); border-radius: 8px; padding: 25px; background: #f8fafc; text-align: left; }
            
            .form-group { margin-bottom: 15px; }
            .form-group label { display: block; font-weight: 600; font-size: 0.9rem; color: var(--text-main); margin-bottom: 5px; }
            .form-group input[type="file"] { width: 100%; padding: 10px; border-radius: 6px; border: 1px solid var(--border-color); font-size: 0.9rem; background: #fff; cursor: pointer; }

            .hash-result-group { margin-top: 15px; }
            .hash-result-group label { font-size: 0.85rem; font-weight: 600; color: var(--text-main); display: block; margin-bottom: 3px; }
            .hash-output-row { display: flex; gap: 8px; }
            .hash-output-row input { flex: 1; padding: 8px; font-family: monospace; font-size: 0.9rem; border: 1px solid var(--border-color); border-radius: 4px; background: #fff; outline: none; }
            .btn-copy-hash { padding: 0 12px; background: var(--primary-color); color: #fff; border: none; border-radius: 4px; cursor: pointer; font-size: 0.85rem; }
            .btn-copy-hash:hover { opacity: 0.9; }

            .loading-text { font-size: 0.9rem; color: #64748b; margin-top: 10px; display: none; }