.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)}.function-tabs{display:flex;gap:12px;margin-bottom:28px;justify-content:center;flex-wrap:wrap}.func-tab{background:transparent;border:none;padding:14px 28px;cursor:pointer;transition:all 0.3s;border-radius:60px;text-align:center;min-width:120px}.func-tab i{font-size:1.2rem;display:block;margin-bottom:6px;color:var(--gray-400)}.func-tab span{display:block;font-weight:600;font-size:0.9rem;color:var(--gray-600)}.func-tab small{font-size:0.65rem;color:var(--gray-400)}.func-tab.active{background:linear-gradient(135deg, #667eea, #764ba2);box-shadow:0 6px 20px rgba(102,126,234,0.3)}.func-tab.active i,.func-tab.active span,.func-tab.active small{color:white}.key-section{margin-bottom:24px}.key-card{background:var(--gray-50);border-radius:24px;padding:20px;border:1px solid var(--gray-200)}.key-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;font-weight:600;color:var(--gray-700)}.key-header i{color:#667eea;margin-right:8px}.icon-btn-sm{background:transparent;border:1px solid var(--gray-300);padding:4px 12px;border-radius:30px;cursor:pointer;font-size:0.7rem;transition:all 0.2s}.icon-btn-sm:hover{background:var(--gray-200)}.key-textarea{width:100%;min-height:100px;padding:12px;font-family:'Fira Code',monospace;font-size:0.75rem;border:1px solid var(--gray-300);border-radius:16px;resize:vertical;background:white}.key-textarea:focus{outline:none;border-color:#667eea}.key-actions{display:flex;gap:8px;margin-top:10px}.key-actions button{background:transparent;border:none;padding:4px 12px;border-radius:20px;font-size:0.7rem;cursor:pointer;color:var(--gray-500)}.key-actions button:hover{background:var(--gray-200);color:#667eea}.data-section{display:grid;grid-template-columns:1fr 1fr;gap:24px}.data-card{background:var(--gray-50);border-radius:24px;padding:20px;border:1px solid var(--gray-200)}.data-header{display:flex;align-items:center;gap:8px;margin-bottom:12px;font-weight:600;color:var(--gray-700)}.data-header i{color:#667eea}.data-textarea{width:100%;min-height:180px;padding:12px;font-family:'Fira Code',monospace;font-size:0.8rem;border:1px solid var(--gray-300);border-radius:16px;resize:vertical;background:white}.data-textarea:focus{outline:none;border-color:#667eea}.data-actions{display:flex;gap:8px;margin-top:12px;flex-wrap:wrap}.data-actions button{background:transparent;border:1px solid var(--gray-300);padding:6px 14px;border-radius:30px;font-size:0.7rem;cursor:pointer;transition:all 0.2s;color:#667eea}.data-actions button:hover{background:var(--gray-200)}.action-btn-main{background:linear-gradient(135deg, #667eea, #764ba2);border:none;color:white;margin-left:auto}.action-btn-main:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(102,126,234,0.4)}.sign-layout{display:grid;grid-template-columns:1fr 1.5fr;gap:24px}.sign-key-card{background:var(--gray-50);border-radius:24px;padding:20px;border:1px solid var(--gray-200)}.sign-textarea{width:100%;min-height:120px;padding:12px;font-family:'Fira Code',monospace;font-size:0.75rem;border:1px solid var(--gray-300);border-radius:16px;resize:vertical;background:white;margin-top:8px}.sign-data-card{background:var(--gray-50);border-radius:24px;padding:20px;border:1px solid var(--gray-200)}.sign-actions{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}.btn-outline{background:transparent;border:1px solid var(--gray-300);padding:8px 20px;border-radius:40px;cursor:pointer;transition:all 0.2s}.btn-outline:hover{background:var(--gray-100);border-color:#667eea;color:#667eea}.verify-result{margin-top:16px;padding:12px;border-radius:12px;text-align:center;font-weight:500}.verify-success{background:#d1fae5;color:#065f46}.verify-fail{background:#fee2e2;color:#991b1b}.keypair-layout{display:grid;grid-template-columns:1fr 360px;gap:24px}.keypair-card{background:var(--gray-50);border-radius:24px;padding:24px;border:1px solid var(--gray-200)}.keypair-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;font-weight:700;font-size:1rem}.keypair-item{margin-bottom:20px}.keypair-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;font-size:0.8rem;font-weight:500;color:var(--gray-600)}.keypair-label button{background:transparent;border:none;color:var(--gray-500);cursor:pointer;font-size:0.7rem}.keypair-label button:hover{color:#667eea}.keypair-textarea{width:100%;min-height:100px;padding:12px;font-family:'Fira Code',monospace;font-size:0.7rem;border:1px solid var(--gray-300);border-radius:16px;resize:vertical;background:white}.keypair-actions{display:flex;gap:12px;margin-top:16px}.btn-primary-sm{background:linear-gradient(135deg, #667eea, #764ba2);border:none;padding:6px 16px;border-radius:30px;color:white;cursor:pointer;font-size:0.75rem}.keypair-info{background:linear-gradient(135deg, #f0f4ff, #e8edf8);border-radius:24px;padding:24px}.keypair-info h4{margin-bottom:16px;display:flex;align-items:center;gap:8px}.keypair-info ul{margin-left:20px;color:var(--gray-600);font-size:0.8rem;line-height:1.8}.info-section{margin-top:32px}.divider{display:flex;align-items:center;gap:12px;margin-bottom:16px}.divider span{font-size:0.85rem;font-weight:500;color:var(--gray-600)}.divider::after{content:'';flex:1;height:1px;background:var(--gray-200)}.info-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;padding:16px;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}@media (max-width:900px){.data-section{grid-template-columns:1fr}.sign-layout{grid-template-columns:1fr}.keypair-layout{grid-template-columns:1fr}.info-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:480px){.func-tab{padding:10px 16px;min-width:80px}.info-grid{grid-template-columns:1fr}.core-stat{padding:12px 20px}}