:root{--primary-color:#1a73e8;--secondary-color:#f5f5f5;--accent-color:#e74c3c;--background-color:#ffffff;--text-color:#333333;--border-color:#bdc3c7;--error-color:#ff4d4f;--primary-color-toolbar-button:green;--shadow-color:rgba(0,0,0,0.1);--transition-speed:0.3s;--font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:var(--font-family);background-color:var(--secondary-color);height:100%}html{scroll-behavior:smooth}#report-container{grid-area:report;background-color:var(--background-color);border-radius:8px;padding:20px;box-shadow:0 2px 6px var(--shadow-color);display:none;min-width:0;width:100%;box-sizing:border-box}.main-container{display:grid;grid-template-rows:1fr auto auto;grid-template-columns:25% 1fr;grid-template-areas:"intro intro" "sidebar main" "actions actions" "report report";gap:20px;width:100%;min-height:110vh;padding:20px}.left-panel{grid-area:header;background-color:var(--background-color);box-shadow:0 2px 6px var(--shadow-color);border-radius:8px;padding:10px;height:auto}.right-panel{grid-area:sidebar;background-color:var(--background-color);box-shadow:2px 0 6px var(--shadow-color);border-radius:8px;padding:20px;overflow-y:auto;max-height:100vh}.center-panel{grid-area:main;display:flex;justify-content:center;align-items:center;padding:0;overflow:hidden;min-height:0}#toolbar{background-color:transparent;box-shadow:none;padding:0;margin-bottom:0;color:var(--text-color);display:flex;flex-direction:row;flex-wrap:wrap;align-items:center;gap:15px}#toolbar .toolbar-group{display:flex;align-items:center;gap:8px}#toolbar button,#toolbar input,#toolbar select{margin:0}.add-section label{margin-top:0;margin-bottom:0}#toolbar button{margin:5px;padding:10px 20px;background-color:#34495e;border:none;color:white;cursor:pointer;border-radius:4px;transition:background-color var(--transition-speed);font-size:14px;align-self:auto}#toolbar button.active,#toolbar button:hover{background-color:var(--primary-color-toolbar-button)}#toolbar input,#toolbar select{margin:5px;padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;font-size:14px}#canvas{border:2px solid var(--border-color);background-color:var(--background-color);width:100%;height:100%;border-radius:8px;box-shadow:0 4px 6px var(--shadow-color);display:block;touch-action:none}#sidebar h2.Properties{cursor:default;font-weight:700;background-color:var(--primary-color);height:40px;line-height:40px;border:none;border-radius:8px;margin-bottom:20px;text-align:center;padding:0;font-size:18px;color:white;box-shadow:0 2px 4px var(--shadow-color)}.model-section-header{font-size:1.2rem;color:var(--primary-color);text-align:left;margin:20px 0 10px;padding:10px 15px;background:linear-gradient(90deg,#e3f2fd,#ffffff);border-radius:6px;font-weight:bold;box-shadow:0px 2px 5px var(--shadow-color);border-left:5px solid var(--primary-color)}.model-item{display:flex;flex-direction:column;background-color:var(--background-color);border:1px solid var(--border-color);margin-bottom:10px;border-radius:8px;cursor:pointer;transition:background-color var(--transition-speed),box-shadow var(--transition-speed);width:100%;box-shadow:0 2px 4px var(--shadow-color)}.model-item:hover{background-color:#f0f8ff;box-shadow:0 4px 8px var(--shadow-color)}.model-item-header{display:flex;align-items:center;padding:12px 16px;background-color:var(--background-color);position:relative;border-radius:8px}.property-icon{width:35px;height:35px;margin-right:5px}.property-icon-container{display:inline-block;vertical-align:middle;margin-right:0px}.model-item-header span{flex-grow:1;font-size:16px;color:var(--text-color)}.delete-icon{color:var(--accent-color);font-size:18px;cursor:pointer;transition:color var(--transition-speed),transform var(--transition-speed);position:absolute;right:12px;top:50%;transform:translateY(-50%)}.delete-icon:hover{color:#c0392b;transform:translateY(-50%) scale(1.2)}.accordion-content{padding:16px;background-color:#f9f9f9;border-top:1px solid var(--border-color);border-bottom-left-radius:8px;border-bottom-right-radius:8px;box-sizing:border-box;animation:fadeIn var(--transition-speed) ease-in-out;max-height:10000px !important}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.form-group{margin-bottom:15px}.form-group label{display:block;font-weight:600;margin-bottom:6px;color:var(--text-color)}.form-group input,.form-group select{width:100%;padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;font-size:14px;transition:border-color var(--transition-speed),box-shadow var(--transition-speed)}.form-group input:focus,.form-group select:focus{border-color:var(--primary-color);box-shadow:0 0 5px rgba(26,115,232,0.5);outline:none}.accordion-content button{padding:10px 16px;background-color:var(--primary-color);border:none;color:white;cursor:pointer;border-radius:4px;font-size:14px;transition:background-color var(--transition-speed);margin-right:10px}.accordion-content button:hover{background-color:#1558b0}.tabs{display:flex;border-bottom:2px solid var(--border-color);margin-bottom:20px;flex-wrap:wrap}.tab-label{padding:10px 20px;cursor:pointer;background-color:#f1f1f1;border:1px solid var(--border-color);border-bottom:none;border-radius:5px 5px 0 0;margin-right:5px;transition:background-color var(--transition-speed);font-weight:bold;white-space:nowrap}.tab-label:hover{background-color:#ddd}.tabs input[type="radio"]{display:none}.tabs input[type="radio"]:checked + .tab-label{background-color:#ffffff;border-bottom:2px solid #ffffff;color:var(--primary-color)}.tab-content{width:100%}.tab-content .tab-panel{display:none}.tabs input[type="radio"]:checked ~ .tab-content .tab-panel{display:block}.add-section form{max-width:100%;box-sizing:border-box;overflow-x:hidden}.form-group input,.form-group select{width:100%;box-sizing:border-box}form button{display:inline-block;margin:5px 10px 5px 0;padding:8px 16px;font-size:14px;border-radius:5px;border:none;cursor:pointer;transition:background-color 0.3s ease}form button:hover{opacity:0.9}form .close-button{background-color:#e74c3c !important;color:white}form .close-button:hover{background-color:#c0392b !important}form button[type="button"]:not(.close-button){background-color:#1abc9c;color:white;font-size:12px}form button[type="button"]:not(.close-button):hover{background-color:#16a085}.form-buttons{display:flex;justify-content:flex-start;gap:10px;margin-top:10px;flex-wrap:wrap}.tab-label{flex:0 1 auto}@media (max-width:600px){.tabs{flex-direction:column}.tab-label{margin-right:0;margin-bottom:5px;border-radius:5px}.tab-content .tab-panel{padding-top:10px}}.error-message{color:var(--error-color);font-size:14px;font-weight:500;margin-top:8px;border-left:3px solid var(--error-color);padding:8px;background-color:#fff1f0;border-radius:4px;box-shadow:0 1px 3px var(--shadow-color);opacity:0;visibility:hidden;transition:opacity var(--transition-speed) ease,visibility var(--transition-speed) ease;margin-bottom:10px}.error-message:not(:empty){opacity:1;visibility:visible}.add-section{background-color:var(--background-color);border:1px solid var(--border-color);border-radius:8px;padding:20px;margin-bottom:20px;box-shadow:0 2px 4px var(--shadow-color);display:flex;justify-content:center;flex-direction:column}.add-section h3{margin-top:0;font-size:1.2rem;color:var(--primary-color);margin-bottom:15px}.add-section form{display:none;flex-direction:column;animation:slideDown var(--transition-speed) ease-in-out}@keyframes slideDown{from{max-height:0;opacity:0}to{max-height:1000px;opacity:1}}.add-section form.active{display:flex}.add-section label{margin-bottom:5px;font-weight:600;font-size:14px;color:var(--text-color);margin-top:10px}.add-section input,.add-section select{margin-bottom:15px;padding:10px 14px;border:1px solid var(--border-color);border-radius:4px;font-size:14px;transition:border-color var(--transition-speed),box-shadow var(--transition-speed);width:-webkit-fill-available;margin-top:5px}.add-section input:focus,.add-section select:focus{border-color:var(--primary-color);box-shadow:0 0 5px rgba(26,115,232,0.5);outline:none}.add-section button{padding:10px 20px;background-color:var(--primary-color);border:none;color:white;cursor:pointer;border-radius:4px;font-size:12px;transition:background-color var(--transition-speed);align-self:center}.add-section button:hover{background-color:#1558b0}.method-selection{margin-bottom:20px}.method-selection label{margin-right:15px;font-weight:500;font-size:14px;color:var(--text-color);display:flex;align-items:center}.method-selection input{margin-right:8px;width:16px;height:16px;cursor:pointer}@media (max-width:1024px){#canvas-container{flex-direction:column;align-items:center}#canvas{width:100%;max-width:800px;height:auto;aspect-ratio:4 / 3}#sidebar{width:100%;margin-left:0;margin-top:20px;height:auto}}@media (max-width:768px){.main-container{grid-template-columns:1fr;grid-template-rows:auto auto auto 1fr;grid-template-areas:"intro" "main" "sidebar" "actions" "report"}.report-schemes-flex-container{flex-direction:column}.right-panel{width:100%;height:auto;max-height:50vh;min-height:500px}.hamburger-button{display:block}#toolbar{display:none}#toolbar.is-active{display:flex;flex-direction:column;align-items:flex-start;gap:15px;position:absolute;top:100%;left:0;right:0;background-color:var(--background-color);padding:20px;border-radius:0 0 8px 8px;box-shadow:0 4px 6px var(--shadow-color);z-index:100}#toolbar.is-active button,#toolbar.is-active .toolbar-group{width:100%}}}.success{color:#28a745;font-weight:bold;font-size:14px;margin:10px 0;line-height:1.5;background-color:#d4edda;border:1px solid #c3e6cb;border-radius:4px;padding:10px;box-shadow:0 2px 4px var(--shadow-color)}.error{color:var(--error-color);font-weight:bold;font-size:14px;margin:10px 0;line-height:1.5;background-color:#f8d7da;border:1px solid #f5c6cb;border-radius:4px;padding:10px;box-shadow:0 2px 4px var(--shadow-color)}.notification{background-color:#ffeb3b;border-left:6px solid #fbc02d;padding:10px 15px;margin:10px 0;font-family:Arial,sans-serif;font-size:14px;border-radius:4px;box-shadow:0 2px 4px rgba(0,0,0,0.1)}.hidden{display:none}.custom-select{position:relative;width:300px;cursor:pointer}.selected-option{display:flex;align-items:center;padding:10px;border:1px solid #ccc;border-radius:4px;background-color:#fff;width:fit-content}.selected-option img{margin-right:5px;width:24px;height:24px}.dropdown-options{position:absolute;top:100%;left:0;right:0;z-index:1000;border:1px solid #ccc;border-radius:4px;background-color:#fff;max-height:200px;overflow-y:auto;display:none;padding:0;width:fit-content;margin:0}.dropdown-options.show{display:block}.dropdown-options li{padding:5px;margin:0;display:flex;align-items:center;list-style:none;cursor:pointer}.dropdown-options li img{margin-right:8px;width:20px;height:20px}.dropdown-options li:hover{background-color:#f0f0f0}.image-container{display:flex !important;flex-direction:row !important;flex-wrap:wrap;justify-content:center;align-items:center;gap:15px;margin-top:10px;border:1px solid #ccc;border-radius:5px;padding:10px;width:100%;box-sizing:border-box}.image-item{flex:0 0 auto;text-align:center}.form-group img,.form-group svg{width:56px;height:56px;border:1px solid #ccc;border-radius:5px;cursor:pointer;padding:3px;transition:transform 0.2s,box-shadow 0.2s}.form-group img:hover,.form-group svg:hover{border-color:#007bff;transform:scale(1.05)}#support-angle:disabled{background-color:#f5f5f5;color:#aaa;border:1px solid #ddd;cursor:not-allowed}.image-container .image-item.selected,.image-container img.selected,.image-container svg.selected{border-color:#ff0000 !important}.image-item p{margin-top:5px;font-size:14px;color:#333;text-align:center}.top-panel-header{display:flex;justify-content:space-between;align-items:center;width:100%}.hamburger-button{display:none;width:40px;height:35px;background:transparent;border:none;cursor:pointer;padding:0;z-index:101}.hamburger-button span{display:block;width:100%;height:4px;background-color:var(--text-color);margin:6px 0;border-radius:2px}@media (max-width:768px){.hamburger-button{display:block}.left-panel{position:relative}#toolbar{display:none}#toolbar.is-active{display:flex;flex-direction:column;align-items:flex-start;gap:15px;position:absolute;top:100%;left:0;right:0;background-color:var(--background-color);padding:20px;border-radius:0 0 8px 8px;box-shadow:0 4px 6px var(--shadow-color);z-index:100}#toolbar.is-active button,#toolbar.is-active .toolbar-group{width:100%}}.canvas-panel{position:relative;max-height:110vh;touch-action:none}.canvas-overlay-top-right{position:absolute;top:15px;right:15px;z-index:10;background-color:rgba(255,255,255,0.7);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);padding:10px 15px;border-radius:8px;border:1px solid rgba(0,0,0,0.1);box-shadow:0 2px 5px rgba(0,0,0,0.1);display:flex;flex-direction:column;gap:8px}.canvas-overlay-top-right .toolbar-group{display:flex;align-items:center;justify-content:space-between;gap:10px}.canvas-overlay-top-right label{font-size:13px;font-weight:500;color:#333}.canvas-overlay-top-right input{width:60px;padding:4px 8px;border:1px solid var(--border-color);border-radius:4px;font-size:13px;text-align:center}.canvas-overlay-top-left{position:absolute;top:15px;left:15px;z-index:10;display:flex;gap:10px}.overlay-button{padding:8px 16px;font-size:14px;background-color:rgba(255,255,255,0.7);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);border:1px solid rgba(0,0,0,0.1);color:#333;border-radius:8px;cursor:pointer;transition:background-color 0.2s ease,transform 0.2s ease;box-shadow:0 2px 5px rgba(0,0,0,0.1)}.overlay-button:hover{background-color:rgba(255,255,255,1);transform:translateY(-2px)}.sidebar-actions{margin-top:25px;padding-top:15px;border-top:1px solid var(--border-color);display:flex;gap:15px}.sidebar-actions button{flex-grow:1;padding:12px;font-size:16px;font-weight:bold;border:none;border-radius:5px;color:white;cursor:pointer;transition:background-color 0.3s,transform 0.1s}.sidebar-actions button:hover{opacity:0.9}.sidebar-actions button:active{transform:scale(0.98)}#saveButton{background-color:#28a745}#loadButton{background-color:#007bff}.report-schemes-flex-container{display:flex;gap:20px;margin-bottom:25px;padding-bottom:25px;border-bottom:2px solid var(--border-color);flex-wrap:wrap;min-width:0}.report-image-container{flex:1;text-align:center;min-width:0;width:100%}.report-image-container h3{margin-bottom:15px}.report-scheme-image{width:100%;max-width:800px;height:auto;background-color:#ffffff;display:block;margin:0 auto}#calculation-actions{grid-area:actions;display:flex;flex-direction:column;align-items:center;gap:5px;padding:10px 0}#calculation-buttons-wrapper{display:flex;justify-content:center;gap:20px}#calculation-actions button{padding:12px 30px;font-size:16px;font-weight:bold;border:none;border-radius:8px;color:white;cursor:pointer;transition:background-color 0.3s,transform 0.1s;box-shadow:0 4px 6px rgba(0,0,0,0.1);margin:0 5px}#calculation-actions button:hover{opacity:0.9}#calculation-actions button:active{transform:scale(0.98)}#calculateButton{background-color:#007bff !important}#openReportButton{background-color:#8e44ad !important}#calculation-actions button:disabled{background-color:#b0b0b0 !important;cursor:not-allowed;opacity:0.6;box-shadow:none;transform:none}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,0.6);display:flex;justify-content:center;align-items:center;z-index:1000;opacity:1;transition:opacity 0.3s ease}.modal-overlay.hidden{opacity:0;pointer-events:none}.modal-content{background-color:white;padding:30px 40px;border-radius:10px;box-shadow:0 5px 15px rgba(0,0,0,0.3);position:relative;min-width:300px;transform:scale(1);transition:transform 0.3s ease}.modal-overlay.hidden .modal-content{transform:scale(0.9)}.modal-close-btn{position:absolute;top:10px;right:15px;font-size:28px;font-weight:bold;color:#aaa;cursor:pointer;line-height:1}.modal-close-btn:hover{color:#333}.report-given-data-container{margin-bottom:25px;padding-bottom:25px;border-bottom:2px solid var(--border-color)}.given-data-content div{font-size:1.05rem;line-height:1.9;padding-left:10px}#calculation-actions button:disabled{background-color:#b0b0b0;cursor:not-allowed;opacity:0.6;box-shadow:none;transform:none}#calculation-actions button:disabled:hover{opacity:0.6}#loading-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,0.6);backdrop-filter:blur(4px);z-index:10000;display:none;justify-content:center;align-items:center;flex-direction:column;opacity:0;transition:opacity 0.3s ease}#loading-overlay.visible{opacity:1}.spinner{border:5px solid rgba(255,255,255,0.3);border-top:5px solid #3498db;border-radius:50%;width:60px;height:60px;animation:spin 1s linear infinite;box-shadow:0 4px 10px rgba(0,0,0,0.3)}.loading-text{margin-top:20px;color:white;font-size:1.2rem;font-weight:600;letter-spacing:0.5px;text-shadow:0 2px 4px rgba(0,0,0,0.5)}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}#addDispPointBtn.active{background-color:#2ecc71;border:2px solid #27ae60;font-weight:bold;animation:pulse 1.5s infinite}@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(46,204,113,0.7)}70%{box-shadow:0 0 0 6px rgba(46,204,113,0)}100%{box-shadow:0 0 0 0 rgba(46,204,113,0)}}.sidebar-units-container{display:flex;align-items:center;gap:10px;padding:15px;margin-bottom:20px;background-color:#f9f9f9;border:1px solid var(--border-color);border-radius:8px}.sidebar-units-container label{font-weight:600;color:var(--text-color)}.sidebar-units-container select{padding:8px 12px;border:1px solid var(--border-color);border-radius:4px;font-size:14px;flex-grow:1}.sidebar-new-calc-container{margin-bottom:20px;padding:0 15px}#newCalculationButton{width:100%;padding:12px;font-size:16px;font-weight:bold;border:none;border-radius:5px;color:white;cursor:pointer;transition:background-color 0.3s,transform 0.1s;background-color:var(--accent-color)}#newCalculationButton:hover{background-color:#c0392b}#newCalculationButton:active{transform:scale(0.98)}#exampleCalculationButton{width:100%;padding:12px;margin-top:10px;font-size:16px;font-weight:bold;border:none;border-radius:5px;color:white;cursor:pointer;transition:background-color 0.3s,transform 0.1s;background-color:#f39c12}#exampleCalculationButton:hover{background-color:#e67e22}#exampleCalculationButton:active{transform:scale(0.98)}.position-method-description{display:none;margin-top:10px;padding:12px;background-color:#f8f9fa;border-left:3px solid var(--primary-color);border-radius:4px;font-size:14px;color:#333;line-height:1.5;transition:all 0.3s ease-in-out}.intro-panel{grid-area:intro;background-color:var(--background-color);border-radius:8px;padding:25px 30px;box-shadow:0 2px 6px var(--shadow-color);border-left:5px solid var(--primary-color);margin-bottom:10px}.intro-panel h1{margin-top:0;color:var(--primary-color);font-size:1.8rem;margin-bottom:15px}.intro-panel p{font-size:1.05rem;line-height:1.6;color:var(--text-color);margin-bottom:15px}.intro-panel ul{list-style-type:disc;margin-left:20px;margin-bottom:15px}.intro-panel li{margin-bottom:8px;line-height:1.5}.intro-alert{background-color:#fff3cd;border:1px solid #ffeeba;color:#856404;padding:15px;border-radius:5px;margin-top:20px;font-weight:500;display:flex;align-items:center;gap:10px}.section-result-table{width:100%;max-width:600px;margin-top:15px;border-collapse:collapse;margin-left:0}.section-result-table tr{background-color:#fff}.section-result-table tr:nth-child(odd){background-color:#f9f9f9}.section-result-table td,.section-result-table th{padding:8px;border:1px solid #ddd;text-align:center}.section-result-table th{background-color:#f2f2f2;font-weight:bold;text-align:left}.section-result-table td:first-child{text-align:left}.highlight-cell{background-color:#e8f4fd !important;font-weight:bold}mjx-container[jax="CHTML"][display="true"],.MathJax_Display{text-align:left !important;margin-left:0 !important;margin-right:0 !important;padding-left:0 !important;text-indent:0 !important}.stress-input-group{display:flex;align-items:center;gap:8px;width:100%}.stress-input-group input{flex:1;min-width:0;width:auto !important}.stress-input-group span{white-space:nowrap;font-size:14px}.highlight-cell{background-color:#e8f4fd !important;font-weight:bold}.ratio-container{margin-top:5px;padding-left:20px;display:none}.ratio-container label{font-weight:normal;font-size:0.9em}.ratio-container input{width:60px !important;padding:4px}.section-checkbox-group{display:flex;align-items:center;gap:10px;margin-bottom:5px}.section-checkbox-group label{margin:0;font-weight:normal;cursor:pointer}.section-checkbox-group input[type="checkbox"]{width:auto;margin:0;cursor:pointer}.intro-panel-header{cursor:pointer}@media (max-width:768px){.canvas-overlay-top-left{top:8px;left:8px;gap:5px;max-width:60%;flex-wrap:wrap}.overlay-button{padding:6px 10px;font-size:12px}.canvas-overlay-top-right{top:8px;right:8px;padding:6px 8px;gap:4px;background-color:rgba(255,255,255,0.9)}.canvas-overlay-top-right .toolbar-group{gap:5px}.canvas-overlay-top-right label{font-size:11px;letter-spacing:-0.3px}.canvas-overlay-top-right input{width:40px;padding:2px 4px;font-size:12px;height:24px}}@media print{.long-formula-container{overflow:visible !important;font-size:70% !important}}