*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:linear-gradient(135deg,#f7fafc 0%,#edf2f7 100%);color:#2d3748;line-height:1.6;min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:600;color:#1a365d;margin-bottom:1rem}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}h5{font-size:1.125rem}h6{font-size:1rem}.container{max-width:1400px;margin:0 auto;padding:2rem}.header{background:linear-gradient(135deg,#1a365d 0%,#2d3748 100%);color:#fff;padding:2rem 0;margin-bottom:2rem;box-shadow:0 4px 6px rgb(0 0 0 / .1)}.header-content{max-width:1400px;margin:0 auto;padding:0 2rem;display:flex;justify-content:space-between;align-items:center}.header h1{color:#fff;margin:0;font-size:2rem;font-weight:700}.header-subtitle{color:#cbd5e0;font-size:1rem;margin-top:.5rem}.calculator-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:2rem;margin-bottom:2rem}.calculator-panel{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 4px 6px rgb(0 0 0 / .05);border:1px solid #e2e8f0;transition:all 0.3s ease}.calculator-panel:hover{box-shadow:0 8px 25px rgb(0 0 0 / .1);transform:translateY(-2px)}.panel-header{display:flex;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:2px solid #e2e8f0}.panel-icon{width:24px;height:24px;margin-right:.75rem;color:#ed8936}.panel-title{font-size:1.25rem;font-weight:600;color:#1a365d;margin:0}.input-group{margin-bottom:1.5rem}.input-label{display:block;font-weight:500;color:#2d3748;margin-bottom:.5rem;font-size:.875rem;text-transform:uppercase;letter-spacing:.05em}.input-wrapper{position:relative;display:flex;align-items:center}.input-field{width:100%;padding:.75rem 1rem;border:2px solid #e2e8f0;border-radius:8px;font-size:1rem;font-weight:500;color:#2d3748;background:#fff;transition:all 0.3s ease}.input-field:focus{outline:none;border-color:#ed8936;box-shadow:0 0 0 3px rgb(237 137 54 / .1)}.input-unit{position:absolute;right:1rem;color:#718096;font-size:.875rem;font-weight:500;pointer-events:none}.select-field{width:100%;padding:.75rem 1rem;border:2px solid #e2e8f0;border-radius:8px;font-size:1rem;font-weight:500;color:#2d3748;background:#fff;cursor:pointer;transition:all 0.3s ease}.select-field:focus{outline:none;border-color:#ed8936;box-shadow:0 0 0 3px rgb(237 137 54 / .1)}.range-slider{width:100%;height:8px;border-radius:4px;background:#e2e8f0;outline:none;cursor:pointer;-webkit-appearance:none;appearance:none}.range-slider::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:#ed8936;cursor:pointer;box-shadow:0 2px 4px rgb(0 0 0 / .2);transition:all 0.3s ease}.range-slider::-webkit-slider-thumb:hover{background:#dd6b20;transform:scale(1.1)}.range-slider::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#ed8936;cursor:pointer;border:none;box-shadow:0 2px 4px rgb(0 0 0 / .2)}.range-value{display:inline-block;margin-left:.75rem;padding:.25rem .75rem;background:#ed8936;color:#fff;border-radius:20px;font-size:.875rem;font-weight:600;min-width:60px;text-align:center}.result-item{display:flex;justify-content:space-between;align-items:center;padding:1rem;margin-bottom:.75rem;background:#f7fafc;border-radius:8px;border-left:4px solid #ed8936;transition:all 0.3s ease}.result-item:hover{background:#edf2f7;transform:translateX(4px)}.result-label{font-weight:500;color:#2d3748;font-size:.875rem}.result-value{font-weight:700;color:#1a365d;font-size:1rem;font-family:'JetBrains Mono',monospace}.result-unit{font-size:.75rem;color:#718096;margin-left:.25rem}.status-good{border-left-color:#38a169}.status-warning{border-left-color:#d69e2e}.status-error{border-left-color:#e53e3e}.membrane-card{background:#fff;border:2px solid #e2e8f0;border-radius:12px;padding:1.5rem;margin-bottom:1rem;cursor:pointer;transition:all 0.3s ease}.membrane-card:hover{border-color:#ed8936;box-shadow:0 4px 12px rgb(237 137 54 / .15)}.membrane-card.selected{border-color:#ed8936;background:#fffaf0;box-shadow:0 4px 12px rgb(237 137 54 / .2)}.membrane-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.membrane-name{font-weight:600;color:#1a365d;font-size:1.125rem}.membrane-manufacturer{color:#718096;font-size:.875rem}.membrane-specs{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;margin-bottom:1rem}.spec-item{display:flex;justify-content:space-between;font-size:.875rem}.spec-label{color:#718096}.spec-value{font-weight:600;color:#2d3748;font-family:'JetBrains Mono',monospace}.chart-container{background:#fff;border-radius:12px;padding:1.5rem;margin-bottom:2rem;box-shadow:0 4px 6px rgb(0 0 0 / .05);border:1px solid #e2e8f0}.chart-title{font-size:1.25rem;font-weight:600;color:#1a365d;margin-bottom:1.5rem;text-align:center}.system-diagram{background:#fff;border-radius:12px;padding:1.5rem;margin-bottom:2rem;box-shadow:0 4px 6px rgb(0 0 0 / .05);border:1px solid #e2e8f0}.action-button{background:linear-gradient(135deg,#ed8936 0%,#dd6b20 100%);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:8px;font-weight:600;font-size:1rem;cursor:pointer;transition:all 0.3s ease;box-shadow:0 4px 6px rgb(237 137 54 / .2)}.action-button:hover{background:linear-gradient(135deg,#dd6b20 0%,#c05621 100%);transform:translateY(-2px);box-shadow:0 6px 12px rgb(237 137 54 / .3)}.action-button:active{transform:translateY(0)}.action-button.secondary{background:linear-gradient(135deg,#718096 0%,#4a5568 100%)}.action-button.secondary:hover{background:linear-gradient(135deg,#4a5568 0%,#2d3748 100%)}.export-section{background:#fff;border-radius:12px;padding:1.5rem;margin-top:2rem;box-shadow:0 4px 6px rgb(0 0 0 / .05);border:1px solid #e2e8f0}.export-buttons{display:flex;gap:1rem;flex-wrap:wrap}@media (max-width:1200px){.calculator-grid{grid-template-columns:1fr 1fr}}@media (max-width:768px){.calculator-grid{grid-template-columns:1fr}.container{padding:1rem}.header-content{flex-direction:column;text-align:center}.export-buttons{flex-direction:column}}.loading{position:relative;overflow:hidden}.loading::after{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgb(237 137 54 / .2),transparent);animation:loading 1.5s infinite}@keyframes loading{0%{left:-100%}100%{left:100%}}.error-message{background:#fed7d7;color:#c53030;padding:.75rem 1rem;border-radius:8px;margin-bottom:1rem;border-left:4px solid #e53e3e;font-size:.875rem;font-weight:500}.success-message{background:#c6f6d5;color:#2f855a;padding:.75rem 1rem;border-radius:8px;margin-bottom:1rem;border-left:4px solid #38a169;font-size:.875rem;font-weight:500}.tooltip{position:relative;cursor:help}.tooltip::after{content:attr(data-tooltip);position:absolute;bottom:125%;left:50%;transform:translateX(-50%);background:#1a365d;color:#fff;padding:.5rem .75rem;border-radius:4px;font-size:.75rem;white-space:nowrap;opacity:0;visibility:hidden;transition:all 0.3s ease;z-index:1000}.tooltip:hover::after{opacity:1;visibility:visible}@media print{.header,.action-button,.export-section{display:none}.calculator-panel{break-inside:avoid;box-shadow:none;border:1px solid #e2e8f0}}