.mode-tabs{display:flex;gap:16px;margin-bottom:32px;justify-content:center}.mode-tab{background:transparent;border:none;padding:16px 32px;cursor:pointer;transition:all 0.3s;border-radius:24px;text-align:center;min-width:200px;background:var(--gray-50);border:1px solid var(--gray-200)}.mode-tab i{font-size:1.3rem;color:var(--gray-500);margin-bottom:8px;display:block}.mode-tab span{display:block;font-weight:600;color:var(--gray-700);margin-bottom:4px}.mode-tab small{font-size:0.7rem;color:var(--gray-400)}.mode-tab.active{background:linear-gradient(135deg, var(--primary-color), var(--primary-dark));border-color:transparent;box-shadow:0 8px 25px rgba(59,130,246,0.3)}.mode-tab.active i,.mode-tab.active span,.mode-tab.active small{color:white}.input-card,.output-card{background:white;border-radius:24px;overflow:hidden;border:1px solid var(--gray-200);margin-bottom:20px;transition:all 0.3s}.input-card:hover,.output-card:hover{box-shadow:0 8px 25px rgba(0,0,0,0.05)}.card-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.card-title{display:flex;align-items:center;gap:12px;font-weight:600;color:var(--gray-700)}.card-title i{color:var(--primary-color);font-size:1.1rem}.char-badge,.format-badge{font-size:0.7rem;font-weight:normal;background:var(--gray-100);padding:2px 10px;border-radius:30px;color:var(--gray-600)}.format-badge{background:#e0e7ff;color:var(--primary-color)}.card-actions{display:flex;gap:8px}.icon-btn-sm{background:transparent;border:none;padding:6px 10px;border-radius:30px;cursor:pointer;transition:all 0.2s;color:var(--gray-500)}.icon-btn-sm:hover{background:var(--gray-100);color:var(--primary-color)}.code-textarea{width:100%;min-height:180px;padding:20px;font-family:'Fira Code',monospace;font-size:0.9rem;line-height:1.6;border:none;resize:vertical;background:#1a1a2e;color:#e0e0e0}.code-textarea:focus{outline:none}.input-hint{padding:12px 20px;background:var(--gray-50);border-top:1px solid var(--gray-200);font-size:0.7rem;color:var(--gray-500);display:flex;align-items:center;gap:8px}.result-content{min-height:150px;padding:20px;font-family:'Fira Code',monospace;font-size:0.85rem;line-height:1.8;background:#1a1a2e;color:#a0a0c0;word-break:break-all}.placeholder-text{color:var(--gray-500);text-align:center;padding:30px}.byte-group{display:inline-block;background:#2d2d44;padding:2px 6px;border-radius:6px;margin:2px;font-family:monospace;font-size:0.8rem;color:#e0e0e0}.byte-highlight{background:var(--primary-color);color:white}.result-footer{display:flex;gap:24px;padding:12px 20px;background:var(--gray-50);border-top:1px solid var(--gray-200);font-size:0.7rem;color:var(--gray-500)}.action-btn{width:100%;padding:14px;font-size:1rem;margin:8px 0 20px;border-radius:50px;background:linear-gradient(135deg, var(--primary-color), var(--primary-dark))}.action-btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(59,130,246,0.3)}.info-card{background:linear-gradient(135deg, #f0f9ff, #e0f2fe);border-radius:24px;padding:20px;margin-top:24px;border:1px solid #bae6fd}.info-header{display:flex;align-items:center;gap:10px;margin-bottom:20px;font-weight:600;color:#0369a1}.info-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px}.info-item{display:flex;gap:12px;background:white;padding:16px;border-radius:16px;transition:all 0.3s}.info-item:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.05)}.info-icon{width:40px;height:40px;background:#e0f2fe;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#0284c7;font-size:1.1rem;flex-shrink:0}.info-content h4{font-size:0.85rem;margin-bottom:6px;color:var(--gray-800)}.info-content p{font-size:0.7rem;color:var(--gray-500);line-height:1.5}.ad-section{margin:30px 0 40px}.ad-banner{background:linear-gradient(135deg, #f5f5f5, #fff);border:1px solid var(--gray-200);border-radius:16px;padding:20px;text-align:center;position:relative}.ad-label{position:absolute;top:8px;right:12px;font-size:0.6rem;color:var(--gray-400)}@media (max-width:900px){.mode-tab{min-width:auto;padding:12px 20px}.info-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:640px){.info-grid{grid-template-columns:1fr}.card-header{flex-direction:column;gap:12px;align-items:flex-start}.card-actions{align-self:flex-end}}