.stats-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-bottom:30px}.stat-card{background:white;border-radius:20px;padding:20px;display:flex;align-items:center;gap:16px;border:1px solid var(--gray-200);transition:all 0.3s}.stat-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,0.1)}.stat-icon{width:50px;height:50px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--primary-color)}.stat-value{font-size:1.6rem;font-weight:700;color:var(--gray-800)}.stat-label{font-size:0.75rem;color:var(--gray-500)}.mode-tabs{display:flex;gap:12px;margin-bottom:24px;border-bottom:1px solid var(--gray-200);padding-bottom:12px}.mode-btn{background:transparent;border:none;padding:10px 24px;border-radius:40px;cursor:pointer;font-size:0.9rem;transition:all 0.2s;color:var(--gray-600)}.mode-btn i{margin-right:8px}.mode-btn.active{background:var(--primary-color);color:white}.input-section{margin-bottom:24px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:12px}.section-header h3{font-size:1rem;display:flex;align-items:center;gap:8px}.input-actions{display:flex;gap:8px}.input-textarea{width:100%;min-height:200px;padding:16px;font-family:'Fira Code',monospace;font-size:0.9rem;border:1px solid var(--gray-300);border-radius:16px;resize:vertical;background:#1a1a2e;color:#e0e0e0;line-height:1.6}.input-textarea:focus{outline:none;border-color:var(--primary-color)}.input-footer{margin-top:8px;display:flex;gap:20px;font-size:0.7rem;color:var(--gray-500)}.options-section{background:var(--gray-50);border-radius:20px;padding:20px;margin-bottom:24px}.options-header{font-size:0.85rem;font-weight:600;margin-bottom:16px;color:var(--gray-700)}.options-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(200px, 1fr));gap:20px}.option-group label{display:block;font-size:0.75rem;color:var(--gray-500);margin-bottom:8px}.option-select{width:100%;padding:8px 12px;border:1px solid var(--gray-300);border-radius:12px;background:white}.option-group .checkbox-label{display:flex;align-items:center;gap:8px;font-size:0.8rem;margin-top:8px}.calc-section{text-align:center;margin:24px 0}.calc-btn{padding:12px 40px;font-size:1rem}.result-section{background:white;border-radius:20px;border:1px solid var(--gray-200);overflow:hidden;margin-bottom:24px;animation:fadeIn 0.3s ease}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, var(--gray-50), #fafafa);border-bottom:1px solid var(--gray-200)}.result-header h3{font-size:1rem;display:flex;align-items:center;gap:8px}.result-actions{display:flex;gap:8px}.result-content{padding:20px;background:#1a1a2e}.result-pre{font-family:'Fira Code',monospace;font-size:0.85rem;color:#4ade80;word-break:break-all;white-space:pre-wrap;margin:0;max-height:300px;overflow-y:auto}.result-footer{padding:12px 20px;background:var(--gray-50);border-top:1px solid var(--gray-200);display:flex;gap:20px;font-size:0.7rem;color:var(--gray-500)}.preview-section{margin-bottom:24px}.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:16px}.preview-item{background:var(--gray-50);border-radius:16px;padding:16px}.preview-label{font-size:0.7rem;color:var(--gray-500);margin-bottom:8px}.preview-value{font-family:'Fira Code',monospace;font-size:0.85rem;color:var(--gray-800);word-break:break-all}.preview-value.changed{color:var(--primary-color)}.knowledge-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-top:20px}.knowledge-card{background:var(--gray-50);border-radius:16px;padding:20px;text-align:center}.knowledge-card i{font-size:28px;color:var(--primary-color);margin-bottom:12px}.knowledge-card h4{font-size:0.85rem;margin-bottom:8px}.knowledge-card p{font-size:0.75rem;color:var(--gray-500);line-height:1.5}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.stats-grid{grid-template-columns:repeat(2, 1fr)}.options-grid{grid-template-columns:1fr}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:600px){.stats-grid{grid-template-columns:1fr}.mode-tabs{flex-wrap:wrap}.preview-grid{grid-template-columns:1fr}.knowledge-grid{grid-template-columns:1fr}}