:root {
  --blue: #007bff;
  --indigo: #6610f2;
  --purple: #6f42c1;
  --pink: #e83e8c;
  --red: #dc3545;
  --orange: #fd7e14;
  --yellow: #ffc107;
  --green: #28a745;
  --teal: #20c997;
  --cyan: #17a2b8;
  --white: #fff;
  --gray: #6c757d;
  --gray-dark: #343a40;
  --primary: #0BCEAF;
 

  --secondary: rgb(14, 128, 242);
  --success: #28a745;
  --info: #17a2b8;
  --warning: #ffc107;
  --danger: #dc3545;
  --light: #ffffff;
  --dark: #343a40;
  --breakpoint-xs: 0;
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;

  --font-family-sans-serif: "Roboto", sans-serif;
  --font-family-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;







  --shadow-light: 0px 0px 10px rgba(255, 255, 255, 0.6);
  --shadow-light-2: 0px 0px 2px rgba(255, 255, 255, 0.4);
  --shadow-light-3: 3px 3px 2px 0px rgba(255, 255, 255, 0.6);
  --shadow-dark: 0px 0px 10px rgba(0, 0, 0, 0.6);
  --shadow-dark-2: 0px 0px 2px rgba(0, 0, 0, 0.4);
  --shadow-dark-3: 5px 4px 5px 0 rgba(0, 0, 50, 0.5);

  /*--container-1-side-padding: clamp(2px, 5vw, 300px);
  --container-1-side-margin: clamp(2px, 5vw, 300px);*/

 
 
  --container-3-side-margin: 2px;
  --container-3-verticle-margin: 2px;
  --container-3-side-padding: 1px;
  --container-3-vertical-padding: 1px;

  --mainframe1-side-padding: 5rem;

  /*--font-family-1: "Roboto", sans-serif;
  --font-family-2: "Roboto", sans-serif;
  --font-family-1: 'JetBrains Mono', 'Fira Code', 'IBM Plex Mono', monospace;*/
 

   



  --color-white-1: rgb(255, 255, 255);
  --color-black-1: rgb(0, 0, 0);
  
  --color-teal-2: rgb(2, 63, 63, .5);
  --color-blue: rgba(177, 243, 250, 0.921);
  
  --color-gray: rgb(98, 137, 156);

    --fontsize-footer: .75rem;
    --fontsize-maelezo: .9rem;
    --fontsize-maelezo-1: 1.2rem;
    --fontsize-maelezo-2: 1.4rem;
    --fontsize-maelezo-3: 1.6rem;
    --fontsize-maelezo-super-small: .7rem;
    --fontsize-maelezo-small: .8rem;
    --fontsize-maelezo-medium: 1.2rem;
    --fontsize-maelezo-large: 1.5rem;
    --fontsize-maelezo-xl: 2rem;
    --fontsize-maelezo-xxl: 3rem;
    --fontsize-top-navbar: .75rem;

   

    --fontsize-maelezo: clamp(0.6rem, 1vw + 0.5rem, 1rem);
    --fontsize-maelezo-medium: clamp(0.7rem, 1vw + 0.5rem, 1.2rem);
    --fontsize-maelezo-large: clamp(.8rem, 1.5vw + 0.5rem, 1.5rem);
    --fontsize-maelezo-xl: clamp(.9rem, 2vw + 0.5rem, 2rem);
    --fontsize-maelezo-xxl: clamp(1.2rem, 3vw + 0.5rem, 3rem);




   




    --container-1-side-padding:250px;
    --container-1-side-margin: 250px;

    --container-2-side-padding: 10px;
    --container-2-vertical-padding: 5px;
    --container-2-side-margin: 0px;
    --container-2-verticle-margin: .5px;
    --general-container-padding: 4px;



 

    --font-family-1: 'Cutive Mono', monospace;


    --fontsize-small: .8rem;
    --fontsize-maelezo: .9rem;
    --fontsize-S: 1rem;
    --fontsize-M: 1.3rem;
    --fontsize-L: 1.6rem;
    --fontsize-large: 2rem;
    --fontsize-larger: 2.5rem;
    --fontsize-XL: 3rem;
    --fontsize-XXL: 4rem;


    ---off-on-sun: inline-flex;
    ---off-on-moon: none;
    --rotation-variable-sun: rotate(0deg) scale(1);
    --rotation-variable-smoon: rotate(90deg) scale(0.8);
    --opacity-sun: 1;
    --opacity-moon: 0;




    --radial-dark: rgba(46, 50, 49, 0.4);
    --radial-light: rgba(215, 253, 254, 0.2); /* use 255 instead of 256 */
    --radial-size: 3.5px 3.5px;















    --background-body: linear-gradient(135deg, rgb(53, 81, 92), #518ca0, #90d2dd); 
    --color-orange: rgb(207, 101, 2);
    --color-gray: rgb(164, 167, 166);
    --color-teal: rgb(2, 63, 63);
    --color-white: rgb(255, 255, 255);
    --color-white-faint: rgba(249, 237, 214, 0.15);
    --color-white-very-faint: rgb(248, 230, 197, .1);
    --color-white-alpha: rgba(255, 255, 255, 0.25);   /* white with XX% opacity */
    --color-dark: rgb(17, 36, 46);
    --color-dark-faint: rgba(3, 25, 30, 0.8);
    --background-white: linear-gradient(135deg, hsl(200, 46%, 74%), rgb(141, 166, 166, .5), rgba(241, 251, 254, 0.997));
    --background-dark-alpha: linear-gradient(135deg, #071e28, #274e5b, #2c5d72);
    
    --background-btn: linear-gradient(180deg, #ce7405, #393501, #131001); 

    --bg-pupple: linear-gradient(135deg, #ad5389, #3c1053);
    --bg-green-yellow: linear-gradient(135deg, #188587, #5b420d);
    --bg-blue-pupple: linear-gradient(135deg, #42698b, #5d1d29);
    --bg-gray-green: linear-gradient(135deg, #5d5964, #0aa1a9);
    --bg-orange-yellow: linear-gradient(135deg, #5d221b, #70500c);
    --bg-gray: linear-gradient(135deg, #dedddd, #6a6a69);
    --bg-whitish: linear-gradient(135deg, #fdfafa, #f7f7f5);
    --bg-blackish: linear-gradient(135deg, #0a2231, #06141f);

  
}









*{
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}

#header{
    height: 100vh;
    background-image: url(images/background.png);
    background-position: center;
    background-size: cover;
}
body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  overflow-x: hidden; /* prevent horizontal scroll */
  font-family: var(--font-family-1);
}
h1, h2, h3, h4, h5, h6, span, label, input, select, option, button, tr, td, a, p {font-family: var(--font-family-1); font-weight: 600; font-size: .9rem;}

.container-1 {
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  width: 100vw; 
  height: 100vh; 
  padding: 30px;
  box-sizing: border-box;
  background: var(--background-body);
}

.container-2 {
  display: grid;
  grid-template-columns:1fr 1fr;  
  gap: 10px;
  width: 100%;
  height: 100%;
  padding: 10px;
  margin: 0px;
  border: 0.3px solid var(--color-gray);
  box-sizing: border-box;
}

.container-3, 
.container-4 {
  display: flex;
  flex-direction: column;     
  width: 100%;   
  height: 100%;     
  padding: 5px;
  border: 0.3px solid var(--color-gray);
  border-top: 1px solid rgba(255, 255, 255, 0.2);  
  border-left: 2px solid rgba(255, 255, 255, 0.2); 
  border-bottom: 2px solid rgba(0, 0, 0, 0.4);      
  border-right: 2px solid rgba(0, 0, 0, 0.4); 
  box-sizing: border-box;
  background: var(--background-body);
  overflow: hidden;
}


.inner-scrolls {
  flex: 1;         
  overflow: auto;
  position: relative;
  height: auto;
  border: .3px solid var(--color-gray);
  padding: 4px;
   /* 🎨 stacked backgrounds */
  background-image: 
    repeating-radial-gradient(
      circle at center,
      var(--radial-dark),
      var(--radial-dark) .4px,
      transparent .4px,
      transparent 100%
    ),
    var(--background-white);

  background-attachment: fixed;
  background-size: 3px 3px, cover; /* dots size, gradient full cover */
  background-position: center top, center top;
  background-repeat: repeat, no-repeat;
}

.task-bar-box{
  border: .2px solid var(--color-white-faint);
  border-radius: 0px;
  padding: var(--general-container-padding);
  margin: 5.0px  0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: auto;
  text-align: center;
  box-sizing: border-box; 
  /* 🎨 stacked backgrounds */
  background-image: 
    repeating-radial-gradient(
      circle at center,
      var(--radial-dark),
      var(--radial-dark) .4px,
      transparent .4px,
      transparent 100%
    ),
    var(--background-body);

  background-attachment: fixed;
  background-size: 3px 3px, cover; /* dots size, gradient full cover */
  background-position: center top, center top;
  background-repeat: repeat, no-repeat;
 
}





.tab-header {
  position: relative;
  display: flex;
  justify-content: flex-start;align-items: center;
  padding: 0;
  align-items: center; /* 👈 key line: make children fill height */
  height: 50px;
  width: 100%;
  margin: 0;
  background: linear-gradient(135deg, #f7f7f7, #e5e5e5);
}

.tab-btn {
  position: relative;
  padding: 2px;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 200px;
  height: 100%;
  background: transparent;
  border: none;
  border-right: 1px solid var(--color-gray);
  cursor: pointer;
  color: var(--color-dark);
  transition: all 0.2s ease;

}

.tab-btn:hover {
  background: rgba(0, 0, 0, 0.05);
}

.tab-btn.active {
  color: var(--color-white);
  font-weight: 600;
  outline: none;
  border-style: none;
  transform: none;
  outline: none;
  box-shadow: none;

  background-image: 
    repeating-radial-gradient(
      circle at center,
      var(--radial-dark),
      var(--radial-dark) .4px,
      transparent .4px,
      transparent 100%
    ),
    var(--background-body);

  background-attachment: fixed;
  background-size: 3px 3px, cover; /* dots size, gradient full cover */
  background-position: center top, center top;
  background-repeat: repeat, no-repeat;
  
}

.tab-box-1 {
  display: flex;
  flex-direction: column;
  position: relative;
  width: 100%;    
  height: 100%;
  min-height: 600px;
  box-sizing: border-box;

  border-top: 1px solid rgba(255, 255, 255, 0.2);
  border-left: 2px solid rgba(255, 255, 255, 0.2);
  border-bottom: 2px solid rgba(0, 0, 0, 0.4);
  border-right: 2px solid rgba(0, 0, 0, 0.4);
  
  background-image: 
    repeating-radial-gradient(
      circle at center,
      var(--radial-dark),
      var(--radial-dark) .4px,
      transparent .4px,
      transparent 100%
    ),
    var(--background-body);

  background-attachment: fixed;
  background-size: 3px 3px, cover; /* dots size, gradient full cover */
  background-position: center top, center top;
  background-repeat: repeat, no-repeat;
  
 
}

.tab-content {
  position: absolute;
  top: 50px;         
  left: 0;
  width: 100%;
  height: calc(100% - 50px);
  box-sizing: border-box;
  opacity: 0 !important;
  pointer-events: none;     /* important: prevent interaction when invisible */
  transition: opacity .2s ease;
}

.tab-content.active {
  opacity: 1 !important;
  pointer-events: auto;
}



.gear-box{
  display: flex;
  gap: 14px;
  align-items: center;
  justify-content: center;
  padding: 1px;
  margin: 0;
  height: 100%;
}

.nut1, 
.nut2{
  position: relative;
  font-size: 2.0rem;
  opacity: .6;
  color:var(--color-white);
  animation: rotate1 20s linear infinite;
  z-index: 1;
}


.nut2{
  font-size: 1.2rem;
  color:var(--color-orange);
  animation-direction: reverse;
  animation: rotate2 10s linear infinite;
}


@keyframes rotate1{
  100%{
    transform: rotate(360deg);
  }
}

@keyframes rotate2 {
  0% {
    transform: translateX(-50%) rotate(0deg);
  }
  100% {
    transform: translateX(-50%) rotate(360deg);
  }
}


.fixed-support-div {
  position: absolute;
  right: -5px;
  top: -80px;
  width: 10px;
  height: 110px;
  background: #585858;
  border-radius: 0px;
  z-index: 999;
}



.cellWrapper{
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2px;
  border: 1.5px solid rgb(82, 199, 187);
  overflow: hidden;
  box-sizing: border-box;
   gap: 3px; 
 
}
.cellLabelSpan {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  box-sizing: border-box;
  max-width: 60%;        
  white-space: normal;     
  word-wrap: break-word;   
}

.cellInput {
  width: 40px; 
  text-align: center;
  box-sizing: border-box;
  height: 100%; 
  background: rgba(255, 253, 253, 0.8);
}


















.modern-checkbox {
  display: inline-flex;
  align-items: center;
  justify-content: space-between !important;
  gap: 0.6em;
  background: var(--color-blue);
  font-family: var(--font-family-1);
  user-select: none;
  border: .2px solid;
  width: 100%;
  margin: 2px  auto;
  padding: 3px ;
  box-sizing: border-box; 
  transition: color 0.25s ease;
}

.modern-checkbox input {
  display: none;
  
}

.checkmark {
  width: 22px;
  height: 22px;
  border: 1px solid var(--color-dark);
  border-radius: 0px;
  position: relative;
  cursor: pointer;
  background: linear-gradient(to bottom right, #f9f9f9, #e9e9e9);
  box-shadow: inset 0 0 3px rgba(0,0,0,0.1);
  transition: all 0.25s ease;
}

.modern-checkbox:hover .checkmark {
  border-color: #999;
}
/* show tick only when checked */
input:checked + .checkmark {
  background: linear-gradient(135deg, #98f6f6, #7bb3f9);
  border-color: transparent;
  box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.35);
}

input:checked + .checkmark::after {
  transform: rotate(45deg) scale(1);
}
.checkmark::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 6px;
  width: 6px;
  height: 12px;
  border-right: 3px solid rgb(143, 5, 5);
  border-bottom: 3px solid rgb(143, 5, 5);
  transform: rotate(45deg) scale(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}




.label-text {
  transition: color 0.25s ease;
}
/*
input:checked ~ .label-text {
  color: #0078ff;
  font-weight: 500;
}*/
.modern-checkbox:has(input:checked) .label-text {
  color: var(--color-orange);
  font-weight: 600;
}




.result_table_cell{
  background: var(--color-white);
  border: 1.5px solid #99b5b0ff;
  font-family: var(--font-family-1);
  width: 180px;
  height: 25PX;
  
}




  #unit-system {
    display: flex;
    flex-direction: column;
    border: .1px solid white;
    gap: 2px;
    align-items: center;
    justify-content: center;
    font-family: sans-serif;
    box-sizing: border-box; 
  }

  #unit-system label {
    display: flex;
    align-items: center;
    user-select: none;
  }

  #unit-system input[type="radio"] {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 1.5px solid #555;
    border-radius: 0px; 
    display: inline-block;
    padding: 0;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: all 0.1s ease-in-out;
  }

  #unit-system input[type="radio"]:checked {
    background-color: var(--color-white); 
  }

  #unit-system input[type="radio"]:checked::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%; transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background: var(--color-orange);
    border-radius: 0px;
  }

  .radio-item {
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 6px;
    padding: 4px;
    border: .2px solid white;
    width: 100%;
    box-sizing: border-box; 
  }

.cell-div{ 
  display: flex; 
  height: 100%; 
  margin: 0;
  padding: 2px;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-family-1);
  font-size: .9rem;
  color: var(--color-dark);
}
.cell-div input{
  width: 30px;
  height: 100%;
 text-align: center;
 border: .2px solid var(--color-dark);
 border-radius: 0;
 background: none; 
 font-size: 1.0rem;
}

.cell-div input::placeholder,
input::placeholder {
  color: var(--color-dark);
  opacity: 1;
}








/* Popup styles */
 .popup {
  display: none; 
  position: fixed; 
  z-index: 9999; 
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  background-color: rgba(0, 0, 0, 0.65); /* Black with opacity */
}

.popup-content {
  position: relative;
  margin: 20% auto;
  padding: 30px 20px;
  border-radius: 0px;
  text-align: center;
  border: .2px solid white;
  width: 300px;
  height: 300px;
  color: var(--color-teal-1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family:  var(--font-family-1);
  font-size: var(--fontsize-maelezo);
  color: var(--color-dark);
  background: rgba(245, 242, 236, 0.5);
  transition: all 0.3s ease; 
}
.popup-content:hover {
  
  background: rgba(249, 244, 239, 0.75);
}


#close-popup{
  color: var(--color-orange); 
  position: absolute; 
  top: 10px; 
  right: 10px; 
  /*float: right;  Float to the right */
  font-size: 25px;
  font-weight: 100;
  padding: 0px;
  cursor: pointer;
  margin: 0 ;
  height: 35px;
  width: 35px;
  display: block; 
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  border: .5px solid var(--color-white);
}

#close-popup:hover {
  color: var(--color-orange);
  border-color: var(--color-orange);
}





.container-concave {
  border-top: 1px solid rgba(255, 255, 255, 0.2);  
  border-left: 2px solid rgba(255, 255, 255, 0.2); 
  border-bottom: 2px solid rgba(0, 0, 0, 0.4);      
  border-right: 2px solid rgba(0, 0, 0, 0.4);      
  padding: var(--general-container-padding);
  margin: 2px 0;
  background: var(--color-dark-faint);            
  transition: all 0.3s ease; 
  position: relative; width: 100%;
  display: flex;                      
  align-items: center;
  justify-content: center;
}






@media (max-width: 1200px) {
  .container-1,
  .container-2 {
    margin: 0;padding: 5PX;
  }
}
/* ---- Responsive adjustments ---- 
@media (max-width: 1100px) {
  .container-1,
  .container-2 {
    margin: 0 10px;
    padding: 0;
  }
}*/

@media (max-width: 750px) {
 
    .container-2 {
      grid-template-columns: 1fr;  
    
    }

    .container-1 {
  
 
  width: 100%; 
  height: 100%; 
 
}

    .container-2 > div{
    
      
      overflow: auto;  
    
    }



}

@media (max-width: 500px) {
  .container-1,
  .container-2 {
    margin: 0 5px;
  }
}





.container-3 img {
    width: 200px;
    height: auto;
}

.container-5 {
    height: 85%; 
    width: 100%;
    display: flex;
    padding: 4px;
    margin: 0;
    gap: 2px; 
    
    /* 🎨 stacked backgrounds */
    background-image: 
      repeating-radial-gradient(
        circle at center,
        var(--radial-dark),
        var(--radial-dark) .4px,
        transparent .4px,
        transparent 100%
      ),
      var(--background-white);
    background-attachment: fixed;
    background-size: 3px 3px, cover; /* dots size, gradient full cover */
    background-position: center top, center top;
    background-repeat: repeat, no-repeat;
    box-sizing: border-box; 
}

.container-tab {
    height: 100%; 
    width: 100%;
    display: flex;
    flex-direction: column;
    padding: 4px;
    margin: 0;
    gap: 2px; 
    box-sizing: border-box; 
    /* 🎨 stacked backgrounds */
    background-image: 
      repeating-radial-gradient(
        circle at center,
        var(--radial-dark),
        var(--radial-dark) .4px,
        transparent .4px,
        transparent 100%
      ),
      var(--background-white);

    background-attachment: fixed;
    background-size: 3px 3px, cover; /* dots size, gradient full cover */
    background-position: center top, center top;
    background-repeat: repeat, no-repeat;
}

#Container-mainModel {
  position: relative;
  height: 100%;
  min-height: 450px;
  display: block;
  width: 100%; 
  background: rgb(71, 2, 2);
  box-sizing: border-box; 
}

#tableContainer{
  position: relative;
  display: flex;
  width:100%; 
  box-sizing: border-box; 
}



/* To prevent too much shrink of cellc */
table td, table th {
  table-layout: fixed;
  width: 200px; 
}
table {
  table-layout: fixed;
  width: 100px; 
}






.item-1{
  display: flex;
  flex-direction: column;
  border: .5px solid var(--color-white);
  padding: 2px;
  position: relative;
  align-items: center;
  justify-content: center;
  margin-top: 45px;
  width: 100%;
  box-sizing: border-box; 

}
.item-1 h1{
  border: .5px solid var(--color-white);
  background: var(--color-white);
  padding: 4px 10px;
  margin-top: -15px;
  margin-bottom: 10px;
  position: relative;
  text-align: center;
}


.rcb_input_box {
  position: absolute;
  width: 40px;
  height: 20px;
  border: .2px solid;
  border-radius: 0;
  text-align: center;
  z-index:  999
}
      



.skew-runway-wrapper {
  display: flex;
  position: relative;
  inset: 0;              /* shorthand for top:0; right:0; bottom:0; left:0; */
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.65);
  z-index: 99;         /* to make sure it's above everything */
  justify-content: center;
  align-items: center;   
}

.skew-runway-content {
  background: var(--color-white);
  padding: 20px;
  width: 60%;
  height: 70%;
  border: 6px ridge var(--color-gray);
  border-radius: 0px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;   /* centers content inside */
}
.plan-model-box { 
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px; 
  padding: 2px; 
  width: 100%; 
  height: 100%; 
  border:1px solid var(--color-white); 
  background: var(--background-body);
  overflow: auto;
  box-sizing: border-box;
 
}

#section-model-2D,
#Length-model-2D {  
  min-height: 400px;
  height: 100%; 
  box-sizing: border-box; 
  position: relative;
  display: block;
  border: .2px solid var(--color-white);

}


.konva-input, .konva-inputL, .konva-unit, .konva-unitL{
    border: 0.2px solid black;
    padding: 1px;
    background: white;
    color: black;
    font-size: 12px;
    text-align: center;
    box-sizing: border-box; 
}

#Text-Container1{
  height: 100%;
  width: 100%;
  background: white;
  padding: 4px;
  box-sizing: border-box; 
  white-space: pre-line;
  font-size: 14px;
  font-weight: 500;
  color: rgb(0, 0, 0);
  font-family: var(--font-family-1);
}


.joint-label {
  background: var(--color-white); 
  color: var(--color-dark);
  border: .3px solid var(--color-dark);
  width: 20px;
  height: 20px;
  border-radius: 8px;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight:  700;
  font-family: var(--font-family-1);
  font-size: .85rem;

}





.input-window {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 9;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 80%;
  min-width: 40%;
  max-width: 95%;
  height: 70%;
  min-height: 50%;
  max-height: 95%;
  background: var(--background-body);
  border: 5px ridge var(--color-gray); 
  border-radius: 0px;
  box-shadow: 5px 5px 6px rgba(0,0,0,0.6);
  padding: 15px;
  box-sizing: border-box;
  cursor: default;
  transition: none; /* avoids flicker during drag */
}

.close-btn, #close-btn-skew, #close-factors {
  border: .5px solid;
  color: var(--color-dark);
  background: var(--color-white-faint);
  font-size:25px;
  font-weight: 100;
  cursor: pointer;
  display: block;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0px;
  width: 35px;
  height: 35px;
  transition: color 0.2s;
  
}

.close-btn:hover,
#close-btn-skew:hover, 
#close-factors:hover {
  color: crimson;
}

.resize-handle {
  position: absolute;
  bottom: 3px;
  right: 3px;
  width: 15px;
  height: 15px;
  background: transparent;
  border-right: 3px solid #666;
  border-bottom: 3px solid #666;
  cursor: se-resize;
  border-radius: 2px;
  opacity: 0.7;
}

.resize-handle:hover {
  opacity: 1;
}

.support-stage{
   position: absolute; 
   right: -30px; 
   top: 0; 
   z-index: 2;
  }



#tableContainer-1,
#results-konva-container {
    background: var(--color-white);
    display: flex;
    flex-direction: column;
    padding: 15px;
    margin: 0;
    width: 100%;
    height: 100%;
    overflow-x: auto;
    border: .5px solid red;
    box-sizing: border-box; 
}
#results-konva {
    background: var(--color-white);
    display: flex;
    flex-direction: column;
    margin: 0;
    width: 100%;
    height: 100%;
    border: 1px solid red;
    box-sizing: border-box; 
}


#results-table-container {
    background: var(--color-white);
    display: flex;
    flex-direction: column;
    padding: 5px;
    margin: 0;
    width: 100%;
    height: 100%;
    overflow-x: auto;
    border: .2px solid red;
    box-sizing: border-box; 
}

/*
#tableContainer input,
#tableContainer select,
#tableContainer-1 input{
  /*min-width: 80px !important;*
  height: 20px;
  border: .5px solid rgb(158, 179, 183);
  border-radius: 0px;
  display: flex;
  align-items: center !important;
  justify-content: center !important;
   padding: 3px !important;
}
*/

input:focus, select:focus{
  outline: none;
  border: .5px ridge var(--color-orange) !important;
 
}



/* Hide number input spinners */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield; /* Firefox */
}



/*
#tableContainer table {
    border-collapse: collapse;
    min-width: 100%; /* make table at least full container width *
}

#tableContainer td {
    min-width: 200px; /* prevent shrinking *
    white-space: nowrap; /* keep inputs/select inline *
   
}

#tableContainer table {
  border-collapse: collapse;
  min-width: 100%; /* let it stretch *
}

#tableContainer td {
  border: 1px solid #000;
  padding: 2px;
  /*min-width: 200px;  prevent shrinking below 200px *
  overflow: visible; /* allow inner content to overflow if needed *
  white-space: nowrap; /* keep input/select inline *
}

*/

button{
  cursor: pointer;
  padding: 4px;
}

.btn-common {
  width: 100%;
  height: auto;
  background: rgb(217, 223, 217);
  margin: 0px;
  color: var(--color-dark);
  font-weight: 600;
  border: 3px ridge black;
  border-radius: 0;
  transition: all .2s ease;
}
.btn-common:hover {
 
  background: rgb(240, 153, 99);
  color: rgb(255, 255, 255);
  border-color: rgb(254, 253, 253);
 
}

.container-6 {
  display: flex;
  flex-direction: column;
  width: 100%;   /* do not exceed column */
  height: auto;      /* height by content */
  padding: 2px;
  border: 0.2px solid grey;
  box-sizing: border-box;
  margin: 20px auto;
  align-items: center;
  justify-content: center;
  
}

.container-7 { /*will fix this to not pushing the parent height*/
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;     
  padding: 2px;
  border: 0.2px solid var(--color-white);
  box-sizing: border-box;
  margin: 0;
  align-items: center;
  justify-content: flex-start;

  overflow-y: auto;
  overflow-x: hidden;
  
}
.all-models-box { 
  display: flex;
  flex-direction: column;
  padding: 2px;
  width: 70%; 
  height: 100%; 
  border:1px solid var(--color-white); 
  box-sizing: border-box; 
 
}

#RCB-model-2D { 
  width: 100%; 
  height: 100%; 
  border: 1px solid var(--color-white); 
  background: var(--bg-whitish);
  position: relative;
  box-sizing: border-box; 
}

#RCB-inner-wrapper {
  position: relative;
  display: block; 
  width: 100%;
  height: 100%; 
  overflow: hidden;
}



.container-6 h1{
  padding: 3px;
  margin: 5px auto; margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  box-sizing: border-box;
  background: rgb(227, 226, 226);
}
.input-item-box{
  display: grid;
  grid-template-columns: 2fr 2fr 1fr; 
  align-items: center;         
  gap: 3px;                       
  border: .5px solid var(--color-white);
  justify-content: center;
  padding: 2px;
  margin: 2px; 
  height: auto;
  box-sizing: border-box;
  width: 100%;       
}

.input-item-box.select-box{
  grid-template-columns: 1fr 1fr; 
}
.input-item-box.check-box,
.input-item-box.btn-box{
  display: flex;
}

.input-item-box input,
.input-item-box select {
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  margin: 0;
  padding: 4px;
  border: 1px solid rgb(0, 0, 0);
  border-radius: 0px;
}

.input-item-box select{
  cursor: pointer;
}

.input-item-box label {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
  height: 100%;
  background: var(--color-blue);
  padding: 2px 4px;
  box-sizing: border-box;
}






#sideNav{
    width: 300px;
    height: 100vh;
    position: fixed;
    right: -500px;
    top: 0;
    z-index: 2;
    transition: .5s;
    /* 🎨 stacked backgrounds */
  background-image: 
    repeating-radial-gradient(
      circle at center,
      var(--radial-dark),
      var(--radial-dark) .4px,
      transparent .4px,
      transparent 100%
    ),
    var(--background-body);

  background-attachment: fixed;
  background-size: 3px 3px, cover; /* dots size, gradient full cover */
  background-position: center top, center top;
  background-repeat: repeat, no-repeat;

  background: var(--background-body);

  box-shadow: -4px 0 5px rgba(0, 0, 0, .5);

}

nav ul li{
    list-style: none;
    margin: 50px 20px;
}
nav ul li a{
    text-decoration: none;
    color: #fff;
}

#menuBtn{
    width: 40px;
    height: 40px;
    color: red;
    position: relative;
    z-index: 9;
    cursor: pointer;
}




@media only screen and (max-width: 770px){



    #header{
        background-image: none;
    }
    .container{
        margin-right: 50px;
        margin-left: 50px;
    }
    .logo{
        margin-top: 27px;
        width: 70px;
    }
    .header-text{
        margin-top: 100px;
    }
   
  
    .common-btn{
        padding: 10px 16px;
    }
    .social-icons img{
        width: 14px;
        margin: 15px auto;
    }
    .about-left-col,.about-right-col{
        flex-basis: 100%;
    }
    .about-text{
        margin: 50px 50px 0;
        display: inline-block;
    }
    .about-text h2{
        font-size: 18px;
    }
    .feature-col{
        flex-basis: 100%;
        margin-bottom: 20px;
    }
    .course-left-col{
        flex-basis: 100%;
    }
    .course-right-col{
        flex-basis: 100%;
        margin-top: 70px;
    }
    .contact-left-col,.contact-right-col{
        flex-basis: 100%;
    }
    .contact-right-col{
        margin-top: 50px;
    }
    .footer-left-col,.footer-right-col{
        flex-basis: 100%;
    }
    .link-title{
        flex-basis: 50%;
        margin-bottom: 30px;
    }
    
}