*,*:before,*:after{box-sizing:border-box}:root{--primary-color: #00C3FF;--secondary-color: #1A181B;--text-color: #333333;--bg-color: #F4F7F6;--card-bg: #FFFFFF;--font-family: "Inter", system-ui, Avenir, Helvetica, Arial, sans-serif}body{margin:0;padding:0;font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{color:var(--secondary-color);font-weight:600;margin-top:0}button{font-family:inherit}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#cbd5e0;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a0aec0}.app-root{display:flex;flex-direction:column;min-height:100vh}.navbar{background-color:#fff;padding:15px 40px;box-shadow:0 2px 4px 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#0000000d}.input-table-container{background:#fff;padding:20px;border-radius:12px;box-shadow:0 2px 4px #0000000d}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.modal-content{background:#fff;padding:30px;border-radius:12px;width:90%;max-width:800px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}.table-wrapper{overflow-x:auto;margin-top:20px}.data-table{width:100%;border-collapse:collapse;font-size:.9rem;color:var(--text-color)}.data-table th,.data-table td{padding:10px 6px;text-align:center;border-bottom:1px solid #eee;vertical-align:middle;white-space:nowrap}.data-table thead tr:first-child th{background-color:transparent;border-bottom:none;padding-bottom:5px}.data-table thead tr:last-child th{background-color:#f9fafb;border-bottom:2px solid #e5e7eb;color:#4b5563;font-weight:600;font-size:.9rem}.header-group{text-align:center;font-weight:700}.input-header{color:#6b7280;border-bottom:2px solid #9ca3af!important}.uniform-header{color:var(--primary-color);background-color:#00c3ff0d!important;border-bottom:2px solid var(--primary-color)!important}.critical-header{color:#ef4444;background-color:#ef44440d!important;border-bottom:2px solid #ef4444!important}.res-cell{font-weight:600;font-size:1rem}.res-cell.uniform{background-color:#00c3ff14;color:#0077a3;border-right:1px solid rgba(0,195,255,.1)}.res-cell.critical{background-color:#ef444414;color:#991b1b}.data-table input,.data-table select{padding:8px 10px;border:1px solid #d1d5db;border-radius:6px;width:100%;font-size:.9rem;transition:border-color .2s,box-shadow .2s;box-sizing:border-box}.data-table input:focus,.data-table select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #00c3ff26}.action-btn{padding:8px 16px;border:none;border-radius:6px;cursor:pointer;font-weight:500;transition:background .2s}.action-btn.add{background-color:var(--secondary-color);color:#fff}.action-btn.add:hover{background-color:#000}.action-btn.calc{background-color:var(--primary-color);color:#fff;margin-left:10px}.action-btn.calc:hover{background-color:#00a0d0}.icon-btn.delete{background:transparent;border:none;color:#9ca3af;cursor:pointer;font-size:1.2rem;transition:color .2s}.icon-btn.delete:hover{color:#ef4444}.chart-btn{background:transparent;border:1px solid #d1d5db;font-size:1.2rem;padding:4px 8px;border-radius:4px}.chart-btn:hover:enabled{background:#f3f4f6;border-color:#9ca3af}.actions-bar{display:flex;padding:20px;border-top:1px solid 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1.5em;padding-right:2.5rem}.section-title{font-size:1.25rem;font-weight:700;color:var(--secondary-color);margin-bottom:20px;padding-bottom:10px;border-bottom:2px solid #f3f4f6}.page-container{max-width:1200px;margin:0 auto}.page-header{margin-bottom:30px;text-align:center}.page-title{font-size:2.2rem;color:#1f2937;font-weight:800;margin-bottom:8px}.page-subtitle{color:#6b7280;font-size:1.1rem}.card-section{background:#fff;border-radius:16px;padding:24px 32px;box-shadow:0 10px 15px -3px #0000000d,0 4px 6px -2px #00000005;margin-bottom:24px;border:1px solid rgba(0,0,0,.02)}.section-header{display:flex;align-items:center;margin-bottom:24px;padding-bottom:12px;border-bottom:2px solid 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#d1d5db;border-radius:6px}.ai-tutor-panel{background-color:#f9fafb;border:1px solid #e5e7eb;border-radius:8px;padding:20px;margin-top:20px;font-family:system-ui,-apple-system,sans-serif}.ai-tutor-header{display:flex;align-items:center;gap:10px;margin-bottom:15px;border-bottom:2px solid #e5e7eb;padding-bottom:10px}.ai-icon{font-size:24px}.chat-history{max-height:300px;overflow-y:auto;margin-bottom:15px;padding:10px;background:#fff;border:1px solid #e5e7eb;border-radius:6px}.chat-message{margin-bottom:10px;padding:8px 12px;border-radius:6px;max-width:80%}.chat-message.user{background-color:#dbeafe;color:#1e3a8a;margin-left:auto;border-bottom-right-radius:0}.chat-message.ai{background-color:#f3f4f6;color:#1f2937;margin-right:auto;border-bottom-left-radius:0}.chat-input-container{display:flex;gap:10px}.chat-input-container input{flex:1;padding:10px;border:1px solid #d1d5db;border-radius:6px;outline:none}.chat-input-container input:focus{border-color:#3b82f6;box-shadow:0 0 0 2px #3b82f633}.chat-input-container button{padding:10px 20px;background-color:#3b82f6;color:#fff;border:none;border-radius:6px;cursor:pointer;font-weight:500}.chat-input-container button:hover:not(:disabled){background-color:#2563eb}.chat-input-container button:disabled{background-color:#9ca3af;cursor:not-allowed}