.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, #3b82f6, #1d4ed8);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, #3b82f6);-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:#3b82f6;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)}.algorithm-tabs{display:flex;gap:16px;margin-bottom:32px;justify-content:center;flex-wrap:wrap}.algo-tab{background:var(--gray-100);border:none;padding:14px 24px;cursor:pointer;transition:all 0.3s;border-radius:20px;text-align:center;min-width:130px}.algo-tab i{font-size:1.2rem;color:var(--gray-500);margin-bottom:6px;display:block}.algo-tab span{display:block;font-weight:600;color:var(--gray-700);margin-bottom:4px}.algo-tab small{font-size:0.65rem;color:var(--gray-400)}.algo-tab.active{background:linear-gradient(135deg, #3b82f6, #1d4ed8);box-shadow:0 8px 20px rgba(59,130,246,0.3)}.algo-tab.active i,.algo-tab.active span,.algo-tab.active small{color:white}.input-section{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}.input-card{background:linear-gradient(135deg, #f8fafc, #fff);border-radius:24px;border:1px solid var(--gray-200);overflow:hidden;transition:all 0.3s}.input-card:hover{box-shadow:0 8px 25px rgba(0,0,0,0.08)}.card-header{display:flex;align-items:center;gap:10px;padding:16px 20px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200);font-weight:600;color:var(--gray-700)}.card-header i{color:#3b82f6}.header-actions{margin-left:auto}.format-select{padding:6px 12px;border:1px solid var(--gray-300);border-radius:30px;font-size:0.75rem;background:white;cursor:pointer}.key-textarea,.message-textarea{width:100%;min-height:120px;padding:16px;border:none;font-family:'Fira Code',monospace;font-size:0.85rem;line-height:1.5;resize:vertical;background:#1a1a2e;color:#e0e0e0}.key-textarea:focus,.message-textarea:focus{outline:none}.key-options,.message-options{display:flex;gap:8px;padding:12px 16px;background:var(--gray-50);border-top:1px solid var(--gray-200);flex-wrap:wrap}.option-btn{background:white;border:1px solid var(--gray-300);padding:5px 12px;border-radius:30px;font-size:0.7rem;cursor:pointer;transition:all 0.2s}.option-btn:hover{background:#3b82f6;border-color:#3b82f6;color:white}.icon-btn-sm{background:transparent;border:none;padding:5px 10px;border-radius:30px;cursor:pointer;color:var(--gray-500)}.icon-btn-sm:hover{background:var(--gray-200);color:#3b82f6}.output-options{display:flex;align-items:center;gap:16px;margin-bottom:24px;padding:12px 20px;background:var(--gray-50);border-radius:60px;flex-wrap:wrap}.output-options label{font-weight:500;font-size:0.85rem;color:var(--gray-600)}.output-buttons{display:flex;gap:8px}.output-btn{background:white;border:1px solid var(--gray-300);padding:6px 18px;border-radius:30px;font-size:0.75rem;cursor:pointer;transition:all 0.2s}.output-btn.active{background:#3b82f6;border-color:#3b82f6;color:white}.action-buttons{display:flex;justify-content:center;gap:16px;margin-bottom:24px}.encrypt-btn{background:linear-gradient(135deg, #3b82f6, #1d4ed8);padding:12px 32px;font-size:1rem;border-radius:50px}.btn-outline{background:transparent;border:1px solid var(--gray-300);padding:12px 24px;border-radius:50px;font-weight:500;cursor:pointer;transition:all 0.3s}.btn-outline:hover{background:var(--gray-100);border-color:#3b82f6;color:#3b82f6}.result-area{background:white;border-radius:24px;overflow:hidden;border:1px solid var(--gray-200);margin-top:24px;animation:fadeIn 0.3s ease}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.result-title{display:flex;align-items:center;gap:10px;font-weight:600}.result-actions{display:flex;gap:8px}.result-action-btn{background:transparent;border:none;padding:6px 12px;border-radius:30px;cursor:pointer;font-size:0.75rem;color:var(--gray-600)}.result-action-btn:hover{background:var(--gray-100);color:#3b82f6}.result-content{padding:24px}.result-label{font-size:0.75rem;color:var(--gray-500);margin-bottom:8px}.hmac-value{background:#1a1a2e;color:#4ade80;padding:16px;border-radius:16px;font-family:'Fira Code',monospace;font-size:0.85rem;word-break:break-all;line-height:1.5;margin:0}.compare-panel{margin-top:20px;padding:20px;border-top:1px solid var(--gray-200);background:var(--gray-50)}.compare-header{font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:8px}.compare-input{display:flex;gap:12px;margin-bottom:16px;flex-wrap:wrap}.compare-field{flex:1;padding:12px 16px;border:1px solid var(--gray-300);border-radius:12px;font-family:monospace;font-size:0.8rem}.compare-btn{background:#3b82f6;color:white;border:none;padding:12px 24px;border-radius:12px;cursor:pointer}.compare-result{padding:12px;border-radius:12px}.compare-result.match{background:#d1fae5;color:#065f46}.compare-result.not-match{background:#fee2e2;color:#991b1b}.info-section{margin-top:32px}.info-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:12px;padding:20px;background:var(--gray-50);border-radius:20px}.info-item{display:flex;align-items:center;gap:8px;font-size:0.8rem;color:var(--gray-600)}.info-item i{color:#10b981}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.input-section{grid-template-columns:1fr}.algorithm-tabs{gap:8px}.algo-tab{padding:10px 16px;min-width:100px}.info-grid{grid-template-columns:1fr}}@media (max-width:480px){.core-stats{gap:12px}.core-stat{padding:12px 20px}.action-buttons{flex-direction:column}.output-options{flex-direction:column;align-items:flex-start}}