:root{--tectura-orange: #E94F1C;--tectura-navy: #042A5E;--tectura-white: #FFFFFF;--tectura-black: #000000;--tectura-gray: #666666;--tectura-light-gray: #F5F5F5;--tectura-border: #DDDDDD;--primary-color: #E94F1C;--secondary-color: #042A5E;--error-color: #d32f2f;--success-color: #E94F1C;--background-color: #F5F5F5;--card-background: #FFFFFF;--text-primary: #000000;--text-secondary: #666666;--border-color: #DDDDDD;--shadow: 0 2px 10px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Archivo,-apple-system,BlinkMacSystemFont,Segoe UI,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--background-color);color:var(--text-primary);line-height:1.6}.app{min-height:100vh;padding:20px}.container{max-width:900px;margin:0 auto}.header{text-align:center;margin-bottom:40px;padding:40px 20px;background-color:var(--tectura-navy);color:#fff;border-radius:3px;box-shadow:var(--shadow)}.header h1{font-family:Archivo Black,sans-serif;font-size:2rem;margin-bottom:10px;text-transform:uppercase;letter-spacing:1px}.header p{font-size:1.1rem;opacity:.95;font-weight:400}.calculator-card{background-color:var(--card-background);border-radius:3px;padding:40px;box-shadow:var(--shadow);margin-bottom:20px}.progress-bar{display:flex;justify-content:space-between;margin-bottom:40px;position:relative}.progress-bar:before{content:"";position:absolute;top:20px;left:0;right:0;height:2px;background-color:var(--border-color);z-index:0}.progress-step{display:flex;flex-direction:column;align-items:center;position:relative;z-index:1;flex:1}.progress-step-number{width:40px;height:40px;border-radius:50%;background-color:var(--border-color);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:8px;border:3px solid var(--card-background)}.progress-step.active .progress-step-number{background-color:var(--primary-color);color:#fff}.progress-step.completed .progress-step-number{background-color:var(--success-color);color:#fff}.progress-step-label{font-size:.85rem;color:var(--text-secondary);text-align:center}.progress-step.active .progress-step-label{color:var(--primary-color);font-weight:600}.form-section{margin-bottom:30px}.form-section h2{color:var(--primary-color);margin-bottom:20px;font-size:1.5rem}.form-group{margin-bottom:24px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-primary)}.form-group input,.form-group select{width:100%;padding:12px;border:2px solid var(--border-color);border-radius:4px;font-size:1rem;transition:border-color .3s}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary-color)}.form-group input.error,.form-group select.error{border-color:var(--error-color)}.error-message{color:var(--error-color);font-size:.875rem;margin-top:4px;display:block}.helper-text{color:var(--text-secondary);font-size:.875rem;margin-top:4px;display:block}.button-group{display:flex;justify-content:space-between;gap:16px;margin-top:32px}.btn{padding:14px 32px;border:none;border-radius:3px;font-size:.95rem;font-weight:600;cursor:pointer;transition:all .3s;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-transform:uppercase;letter-spacing:.5px;font-family:Archivo,sans-serif}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--tectura-orange);color:#fff}.btn-primary:hover:not(:disabled){background-color:#d44518;transform:translateY(-2px);box-shadow:0 4px 12px #e94f1c66}.btn-secondary{background-color:var(--tectura-navy);color:#fff}.btn-secondary:hover:not(:disabled){background-color:#063469;transform:translateY(-1px)}.btn-success{background-color:var(--tectura-orange);color:#fff}.btn-success:hover:not(:disabled){background-color:#d44518;transform:translateY(-2px);box-shadow:0 4px 12px #e94f1c66}.results-container{margin-top:30px}.results-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px;margin-bottom:30px}.result-card{background:linear-gradient(135deg,var(--primary-color),#2a6ab0);color:#fff;padding:24px;border-radius:8px;box-shadow:var(--shadow)}.result-card.success{background:linear-gradient(135deg,var(--secondary-color),#3a9b3a)}.result-card-label{font-size:.9rem;opacity:.9;margin-bottom:8px}.result-card-value{font-size:2rem;font-weight:700;margin-bottom:4px}.result-card-unit{font-size:.875rem;opacity:.8}.results-details{background-color:#f9f9f9;padding:24px;border-radius:8px;margin-bottom:20px}.results-details h3{color:var(--primary-color);margin-bottom:16px}.results-table{width:100%;border-collapse:collapse}.results-table tr{border-bottom:1px solid var(--border-color)}.results-table td{padding:12px 8px}.results-table td:first-child{color:var(--text-secondary);width:60%}.results-table td:last-child{text-align:right;font-weight:600;color:var(--text-primary)}.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000}.loading-spinner{background-color:#fff;padding:40px;border-radius:8px;text-align:center}.spinner{border:4px solid var(--border-color);border-top:4px solid var(--primary-color);border-radius:50%;width:50px;height:50px;animation:spin 1s linear infinite;margin:0 auto 20px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.alert{padding:16px;border-radius:4px;margin-bottom:20px}.alert-error{background-color:#ffebee;color:var(--error-color);border-left:4px solid var(--error-color)}.alert-success{background-color:#e8f5e9;color:var(--success-color);border-left:4px solid var(--success-color)}.icon-selection-group{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin-top:12px}.icon-selection-button{background-color:var(--card-background);border:2px solid var(--border-color);border-radius:8px;padding:20px;cursor:pointer;transition:all .3s;display:flex;flex-direction:column;align-items:center;text-align:center;position:relative}.icon-selection-button:hover{border-color:var(--primary-color);background-color:#f8f9fa;transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.icon-selection-button.selected{border-color:var(--primary-color);background-color:#e3f2fd;box-shadow:0 0 0 3px #1a54901a}.icon-selection-button.compact{padding:16px 12px}.icon-selection-icon{color:var(--text-secondary);margin-bottom:12px}.icon-selection-button.selected .icon-selection-icon{color:var(--primary-color)}.icon-selection-icon.small{margin-bottom:8px}.icon-selection-label{font-weight:600;color:var(--text-primary);margin-bottom:4px;font-size:.95rem}.icon-selection-description{font-size:.8rem;color:var(--text-secondary)}.material-cards-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:20px}.material-card{background-color:var(--card-background);border:2px solid var(--border-color);border-radius:12px;padding:24px;cursor:pointer;transition:all .3s;position:relative}.material-card:hover{border-color:var(--primary-color);transform:translateY(-4px);box-shadow:0 8px 24px #00000026}.material-card.selected{border-color:var(--primary-color);background-color:#e3f2fd;box-shadow:0 0 0 4px #1a54901a}.material-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:16px}.material-category-badge{background-color:var(--primary-color);color:#fff;padding:4px 12px;border-radius:12px;font-size:.75rem;font-weight:600;text-transform:uppercase}.material-selected-badge{display:flex;align-items:center;justify-content:center}.material-name{font-size:1.15rem;font-weight:700;color:var(--text-primary);margin-bottom:12px}.material-description{color:var(--text-secondary);font-size:.9rem;margin-bottom:16px;line-height:1.5}.material-pricing{background-color:#f5f5f5;padding:12px;border-radius:6px;margin-bottom:16px}.material-card.selected .material-pricing{background-color:#1a549014}.material-price-per-m2{font-size:1.25rem;font-weight:700;color:var(--primary-color);margin-bottom:4px}.material-total-cost{font-size:.9rem;color:var(--text-secondary);font-weight:600}.material-specs{margin-bottom:12px;padding:8px 0;border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}.material-spec-item{font-size:.85rem;color:var(--text-secondary);padding:4px 0}.material-spec-item strong{color:var(--text-primary)}.material-benefits{list-style:none;padding:0;margin:0}.material-benefits li{font-size:.85rem;color:var(--text-secondary);padding:4px 0 4px 20px;position:relative}.material-benefits li:before{content:"✓";position:absolute;left:0;color:var(--success-color);font-weight:700}.material-selection-summary{background-color:#e8f5e9;border-left:4px solid var(--success-color);padding:20px;border-radius:6px;margin-top:24px}.material-selection-summary h4{color:var(--success-color);margin-bottom:16px;font-size:1.1rem}.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px}.summary-item{background-color:#fff;padding:12px;border-radius:6px}.summary-item.highlight{background-color:var(--success-color);color:#fff}.summary-label{font-size:.8rem;color:var(--text-secondary);margin-bottom:4px;font-weight:500}.summary-item.highlight .summary-label{color:#ffffffe6}.summary-value{font-size:1.1rem;font-weight:700;color:var(--text-primary)}.summary-item.highlight .summary-value{color:#fff;font-size:1.25rem}.heating-source-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;margin-top:12px}.heating-source-button{background-color:var(--card-background);border:2px solid var(--border-color);border-radius:8px;padding:20px 16px;cursor:pointer;transition:all .3s;display:flex;flex-direction:column;align-items:center;text-align:center}.heating-source-button:hover{border-color:var(--primary-color);background-color:#f8f9fa;transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.heating-source-button.selected{border-color:var(--primary-color);background-color:#e3f2fd;box-shadow:0 0 0 3px #1a54901a}.heating-source-icon{color:var(--text-secondary);margin-bottom:12px}.heating-source-button.selected .heating-source-icon{color:var(--primary-color)}.heating-source-label{font-weight:600;color:var(--text-primary);margin-bottom:6px;font-size:.9rem}.heating-source-co2{font-size:.75rem;color:var(--text-secondary);font-weight:500}@media (max-width: 768px){.calculator-card{padding:24px}.header h1{font-size:1.5rem}.progress-step-label{font-size:.75rem}.button-group{flex-direction:column}.results-summary{grid-template-columns:1fr}.result-card-value{font-size:1.5rem}.material-cards-grid{grid-template-columns:1fr}.heating-source-grid{grid-template-columns:repeat(2,1fr)}.summary-grid{grid-template-columns:1fr}}