*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,Microsoft YaHei,sans-serif}body{color:#333;background-color:#f5f7fa;max-width:1200px;margin:0 auto;padding:20px;line-height:1.6}.container{background-color:#fff;border-radius:12px;padding:25px;box-shadow:0 6px 20px #00000014}header{text-align:center;margin-bottom:25px}h1{color:#2c3e50;margin-bottom:10px;font-size:2.2rem}.formula-display{color:#fff;text-align:center;background:linear-gradient(135deg,#3498db,#2c3e50);border-radius:8px;margin:0 0 25px;padding:12px;font-family:Courier New,monospace;font-size:1.1rem;font-weight:700}.main-content{grid-template-columns:1fr 1fr;gap:25px;margin-bottom:25px;display:grid}@media (max-width:768px){.main-content{grid-template-columns:1fr}}.section-card{background-color:#f8f9fa;border-radius:10px;padding:25px;box-shadow:0 4px 6px #0000000d}.section-card.standard{border-top:4px solid #2ecc71}.section-card.measured{border-top:4px solid #e74c3c}.section-header{text-align:center;margin-bottom:25px}.section-header h2{color:#2c3e50;margin-bottom:5px;font-size:1.5rem}.color-visualization{text-align:center;border:1px solid #ddd;border-radius:8px;justify-content:center;align-items:center;width:100%;height:80px;margin-bottom:25px;font-size:.9rem;font-weight:700;display:flex}.lab-inputs{grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:20px;display:grid}.input-group{text-align:center;border-top:1px dashed #ddd;margin-top:10px;padding-top:10px}.input-group label{color:#2c3e50;margin-bottom:8px;font-size:.95rem;font-weight:600;display:block}.input-value{color:#2c3e50;margin-bottom:5px;font-size:1.3rem;font-weight:700}input[type=number],input[type=text],input[type=password],select,textarea{background-color:#fff;border:1px solid #ddd;border-radius:6px;width:100%;padding:10px 12px;font-family:inherit;font-size:1rem;transition:border .3s}input:focus,select:focus,textarea:focus{border-color:#3498db;outline:none;box-shadow:0 0 0 2px #3498db33}.threshold-group{text-align:center;border-top:1px dashed #ddd;margin-top:10px;padding-top:10px}.threshold-label{color:#2c3e50;margin-bottom:8px;font-weight:600;display:block}.threshold-input{width:120px;margin:0 auto;display:block}.calculate-btn-container{text-align:center;margin:30px 0}.calculate-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#3498db,#2c3e50);border:none;border-radius:8px;padding:16px 40px;font-size:1.2rem;font-weight:600;transition:all .3s;display:inline-block}.calculate-btn:hover{background:linear-gradient(135deg,#2980b9,#1a252f);transform:translateY(-3px);box-shadow:0 6px 12px #2980b94d}.results-section,.history-section{background-color:#f8f9fa;border-radius:10px;margin-bottom:25px;padding:20px}.results-header,.history-header{text-align:center;margin-bottom:20px}.results-header h2,.history-header h2{color:#2c3e50;font-size:1.5rem}.delta-results{grid-template-columns:repeat(4,1fr);gap:15px;display:grid}@media (max-width:768px){.delta-results{grid-template-columns:repeat(2,1fr)}}.delta-card{text-align:center;background-color:#fff;border-radius:8px;padding:20px;box-shadow:0 4px 6px #0000000d}.delta-card.delta-e{color:#fff;background:linear-gradient(135deg,#9b59b6,#8e44ad)}.delta-label{margin-bottom:8px;font-size:1rem;font-weight:600}.delta-card.delta-e .delta-label{color:#ffffffe6}.delta-value{font-size:1.8rem;font-weight:700}.delta-note{color:#7f8c8d;margin-top:5px;font-size:.85rem}.history-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:15px;margin-bottom:20px;display:flex}.history-controls{gap:15px;display:flex}.export-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#2ecc71,#27ae60);border:none;border-radius:6px;padding:10px 20px;font-size:1rem;font-weight:600}.clear-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#e74c3c,#c0392b);border:none;border-radius:6px;padding:10px 20px;font-size:1rem;font-weight:600}.history-table{border-collapse:collapse;background-color:#fff;border-radius:8px;width:100%;overflow:hidden;box-shadow:0 4px 6px #0000000d}.history-table th{color:#fff;text-align:left;background-color:#2c3e50;padding:12px;font-size:.9rem}.history-table td{border-bottom:1px solid #eee;padding:10px 12px;font-size:.9rem}.history-table tr:nth-child(2n){background-color:#f9f9f9}.history-table tr:hover{background-color:#f1f8ff}.no-data{text-align:center;color:#7f8c8d;padding:30px;font-style:italic}.footer{text-align:center;color:#7f8c8d;border-top:1px solid #eee;margin-top:30px;padding-top:20px;font-size:.9rem}.pass{color:#27ae60;font-weight:700}.fail{color:#e74c3c;font-weight:700}.admin-bar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:20px;display:flex}.admin-bar a,.link-btn{color:#3498db;cursor:pointer;background:0 0;border:none;font-size:.95rem;font-weight:600;text-decoration:none}.panel{background:#f8f9fa;border-radius:10px;margin-bottom:25px;padding:20px}.panel h3{color:#2c3e50;margin-bottom:15px;font-size:1.2rem}.form-row{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));align-items:end;gap:12px;margin-bottom:12px;display:grid}.btn{cursor:pointer;border:none;border-radius:6px;padding:10px 20px;font-size:.95rem;font-weight:600}.btn-primary{color:#fff;background:linear-gradient(135deg,#3498db,#2c3e50)}.btn-danger{color:#fff;background:linear-gradient(135deg,#e74c3c,#c0392b)}.btn-sm{padding:6px 12px;font-size:.85rem}.table-actions{gap:8px;display:flex}.login-wrap{max-width:380px;margin:60px auto}.login-wrap .panel{background:#fff}.error-text{color:#e74c3c;margin-top:10px;font-size:.9rem}.muted{color:#7f8c8d;font-size:.85rem}