.tool-header{text-align:center;margin-bottom:40px}.header-badge{display:flex;justify-content:center;gap:12px;margin-bottom:24px;flex-wrap:wrap}.badge{background:linear-gradient(135deg, #667eea, #764ba2);color:white;padding:6px 18px;border-radius:40px;font-size:0.75rem;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.tool-header h1{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg, #1e293b, #667eea);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}.tool-header p{color:var(--gray-500);font-size:1rem}.core-stats{display:flex;justify-content:center;gap:24px;margin-bottom:32px;flex-wrap:wrap}.core-stat{background:white;border-radius:60px;padding:16px 28px;display:flex;align-items:center;gap:16px;box-shadow:0 4px 15px rgba(0,0,0,0.05);border:1px solid var(--gray-200)}.core-stat-icon{width:48px;height:48px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#667eea;font-size:1.3rem}.core-stat-info{text-align:left}.core-stat-value{display:block;font-size:1.5rem;font-weight:700;color:var(--gray-800)}.core-stat-label{font-size:0.7rem;color:var(--gray-500)}.hex-tabs{display:flex;gap:12px;margin-bottom:32px;justify-content:center;flex-wrap:wrap}.hex-tab{background:transparent;border:none;padding:14px 28px;cursor:pointer;transition:all 0.3s;border-radius:20px;text-align:center;min-width:140px}.hex-tab i{font-size:1.3rem;color:var(--gray-400);margin-bottom:8px;display:block}.hex-tab span{display:block;font-weight:600;color:var(--gray-600);margin-bottom:4px}.hex-tab small{font-size:0.65rem;color:var(--gray-400)}.hex-tab.active{background:linear-gradient(135deg, #667eea, #764ba2);box-shadow:0 8px 25px rgba(102,126,234,0.3)}.hex-tab.active i,.hex-tab.active span,.hex-tab.active small{color:white}.editor-card{background:white;border-radius:24px;overflow:hidden;border:1px solid var(--gray-200);transition:all 0.3s;margin-bottom:24px}.editor-card:hover{box-shadow:0 8px 25px rgba(0,0,0,0.08)}.editor-card.full-width{width:100%}.editor-header{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.editor-title{display:flex;align-items:center;gap:12px;font-weight:600;color:var(--gray-700)}.editor-title i{color:#667eea}.char-count{font-size:0.7rem;font-weight:normal;color:var(--gray-400);background:var(--gray-100);padding:2px 8px;border-radius:20px}.editor-actions{display:flex;gap:8px}.icon-btn-sm{background:transparent;border:none;padding:6px 12px;border-radius:30px;cursor:pointer;transition:all 0.2s;color:var(--gray-500);font-size:0.8rem}.icon-btn-sm:hover{background:var(--gray-100);color:#667eea}.hex-textarea{width:100%;min-height:150px;padding:20px;border:none;font-family:'Fira Code',monospace;font-size:0.85rem;line-height:1.6;resize:vertical;background:#1a1a2e;color:#e0e0e0}.hex-textarea:focus{outline:none}.hex-result{padding:20px;font-family:'Fira Code',monospace;font-size:0.85rem;line-height:1.8;background:#1a1a2e;color:#a0e0ff;word-break:break-all;max-height:300px;overflow-y:auto}.file-hex-result{max-height:400px;font-size:0.7rem}.convert-options{background:var(--gray-50);border-radius:20px;padding:20px;margin:20px 0;display:flex;flex-wrap:wrap;gap:24px}.option-group{flex:1;min-width:160px}.option-group label{display:block;font-size:0.75rem;font-weight:600;color:var(--gray-500);margin-bottom:8px}.format-buttons,.case-buttons{display:flex;gap:8px;flex-wrap:wrap}.format-btn,.case-btn{background:white;border:1px solid var(--gray-200);padding:6px 16px;border-radius:40px;font-size:0.75rem;cursor:pointer;transition:all 0.2s}.format-btn.active,.case-btn.active{background:#667eea;border-color:#667eea;color:white}.encode-select{width:100%;padding:8px 12px;border:1px solid var(--gray-200);border-radius:40px;background:white;font-size:0.8rem}.checkbox-label{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:0.8rem;margin-top:8px}.convert-btn{width:100%;padding:14px;margin:20px 0;font-size:1rem;border-radius:50px;background:linear-gradient(135deg, #667eea, #764ba2)}.file-upload-card{background:var(--gray-50);border-radius:24px;padding:24px;margin-bottom:24px}.upload-area{border:2px dashed var(--gray-300);border-radius:20px;padding:40px;text-align:center;cursor:pointer;transition:all 0.3s}.upload-area:hover{border-color:#667eea;background:rgba(102,126,234,0.05)}.upload-area i{font-size:48px;color:var(--gray-400);margin-bottom:16px}.upload-area span{font-size:0.7rem;color:var(--gray-400);display:block;margin-top:8px}.file-info{background:white;border-radius:16px;padding:16px;margin:16px 0}.file-info-row{display:flex;gap:12px;padding:6px 0;font-size:0.8rem}.file-info-row span{width:80px;color:var(--gray-500)}.hex-viewer{background:#1a1a2e;padding:16px;font-family:'Fira Code',monospace;font-size:0.75rem;line-height:1.6;color:#e0e0e0;overflow-x:auto;max-height:400px}.hex-viewer-line{display:flex;gap:20px;padding:4px 0;border-bottom:1px solid rgba(255,255,255,0.05)}.hex-viewer-offset{color:#888;width:60px}.hex-viewer-bytes{flex:1;letter-spacing:2px}.hex-viewer-ascii{color:#4ade80;width:200px}.hex-reference{margin-top:32px}.hex-table{margin-top:16px;background:white;border-radius:20px;overflow:hidden;border:1px solid var(--gray-200)}.hex-table-grid{display:flex;flex-direction:column}.hex-table-header{display:grid;grid-template-columns:repeat(4, 1fr);background:var(--gray-100);padding:12px 16px;font-weight:600;font-size:0.8rem;border-bottom:1px solid var(--gray-200)}.hex-table-body{display:grid;grid-template-columns:repeat(4, 1fr);gap:4px;padding:12px}.hex-table-body .hex-row{display:contents}.hex-table-body .hex-cell{padding:6px 12px;font-family:'Fira Code',monospace;font-size:0.7rem;border-bottom:1px solid var(--gray-100)}.info-footer{margin-top:32px;background:var(--gray-50);border-radius:28px;padding:24px}.info-footer-header{display:flex;align-items:center;gap:10px;margin-bottom:20px;font-weight:600;color:var(--gray-700)}.info-footer-steps{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.step-item{display:flex;gap:14px;align-items:flex-start}.step-number{width:36px;height:36px;background:#667eea;color:white;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.step-content h4{font-size:0.9rem;margin-bottom:4px}.step-content p{font-size:0.75rem;color:var(--gray-500)}@media (max-width:900px){.info-footer-steps{grid-template-columns:repeat(2, 1fr)}.hex-tab{min-width:auto;padding:10px 16px}.convert-options{flex-direction:column}}@media (max-width:480px){.info-footer-steps{grid-template-columns:1fr}.core-stats{gap:12px}.core-stat{padding:12px 20px}}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}