* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background: #eef2f7;
 
}

/* Header */
.header {
  height: 70px;
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 30px;
}



.header h1 {
  font-size: 20px;
}

.header p {
  font-size: 12px;
  opacity: 0.8;
}

.procedure-btn {
  background: white;
  color: #1e40af;
  border: none;
  padding: 10px 18px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
}
.header-actions {
  display: flex;
  gap: 12px;
}

/* Reset button (secondary) */
.reset-btn {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.8);
  padding: 9px 18px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s;
}

.reset-btn:hover {
  background: rgba(255,255,255,0.15);
}


/* Modal */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(4px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 900;
}

.modal {
  width: 480px;
  background: rgba(255,255,255,0.95);
  border-radius: 14px;
  padding: 25px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.3);
  animation: pop 0.3s ease;
}

@keyframes pop {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.modal-top {
  display: flex;
  justify-content: space-between;
  margin-bottom: 15px;
}

.modal-top span {
  cursor: pointer;
  font-size: 18px;
}

/* Workspace */
.workspace {
  display: flex;
  min-height: calc(100vh - 70px); /* allows page to grow */
}


/* Controls */
.controls {
  width: 230px;
  background: #ffffff;
  padding: 40px;
  border-right: 1px solid #dbe1ea;
  height: fit-content;
}

.controls h3 {
  margin-bottom: 15px;
}

.controls button {
  width: 100%;
  padding: 12px;
  margin-bottom: 10px;
  border: none;
  border-radius: 8px;
  background: #f1f5f9;
  cursor: pointer;
  transition: 0.2s;
}

.controls button:hover {
  background: #2563eb;
  color: white;
}

.controls .primary {
  background: #2563eb;
  color: white;
}
.primary:disabled{
  background: #fbe6e6;
}
/* Simulation */
.simulation {
  flex: 1;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 200px;
}
.controls,
.sim-upper,
.sim-lower {
  flex-shrink: 0;
}


#infoBox {
  position: absolute;
  top: 90%;
  left: 2%;
  width: fit-content;
  padding: 10px 14px;
  background: rgba(177, 174, 174, 0.469);
  color: white;
  border: 1px solid white;
  border-radius: 6px;
  /* display: none; */
  z-index: 9999;
}


svg image {
  pointer-events: all;
  cursor: pointer;
}

.sim-upper {
  flex: 3;
  background: white;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);


}
.sim-upper {
  min-height: 70%; /* adjust if needed */
}

.placeholder #heading{
    color: rgb(255, 255, 255);
    position: absolute;
    border-radius: 5px;
    padding: 5px 5px;
    border: 2px solid white;
    background: rgba(255, 255, 255, 0);
    top: 1%;
    left: 40%;
    transform: translate(50% ,50);
    font-size: 20px;
    font-family:'Segoe UI', sans-serif;
    font-weight: 600;
}

.placeholder {
  height: 90%;
  margin-top: 10px;
  border-radius: 10px;
  background: rgb(79, 133, 160);
  position: relative;

  display: flex;
  flex-direction: column;
}

.svg-container {
  height: 100%;
  width: 100%;
  overflow: hidden;   /* 🔑 stops expansion */
  position: relative;
}
.display3dview {
  position: absolute;
  
  height: 100%;
  right:20%;
}
.innersvg{
  height: 85%;
  width: 85%;
  max-height: 800px;
  left: 12%;
  top: 10%;
  position:relative;
}
.innersvg svg{
  height: 100%;
  width: 100%;
}
.display3dview svg {
    pointer-events: all;
  height: 110%;
  width: 110%;
    pointer-events: all;
  cursor: pointer;
  display: block;
}


.responsive-svg {
  height: 100%;
  width: auto;        /* keeps aspect ratio */
  max-width: 100%;
}

.svg-container .pointer{
  position: absolute;
  z-index: 200;
  top: 15%;
    right: 51%;
  
  transform: translateY(0);
  transition: transform 5s linear;
  will-change: transform;
}
.svg-container .svg-base{
  position: absolute;
  z-index: 100;
  top: 40%;
  right: 50%;
}
.graph  {
  height: 250px;
  margin: 1px;
  padding: 10px 10px;
  border-radius: 20px;
  width: 250px;
  background: white;
  position: absolute;
  min-height: 200px;
  min-width: 200px;
top: 5%;
  right: 5%;
  z-index: 500;
}
.svg-container svg {
    pointer-events: all;
  cursor: pointer;
  width: 100%;
  height: 100%;
}
.display3dview{
  height: 100%;
  width: 100%;
}
.sim-lower {
  flex: 1;
  background: white;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.08);
   /* 🔑 enables vertical scroll */
}



/* ============================= */
/* RESPONSIVE LAYER – SAFE MODE  */
/* ============================= */

/* Tablets & below */
@media (max-width: 1024px) {

  .workspace {
    flex-direction: column;
  }

  .controls {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #dbe1ea;
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .controls h3 {
    width: 100%;
  }

  .controls button {
    width: calc(50% - 10px);
  }

  .simulation {
    padding: 15px;
  }

  .svg-container {
    width: 100%;
    height: auto;
  }

  .graph {
    position: relative;
    right: auto;
    margin: 20px auto;
  }
}

/* Mobile phones */
@media (max-width: 600px) {

  /* Header */
  .header {
    flex-direction: column;
    height: auto;
    padding: 15px;
    gap: 10px;
    text-align: center;
  }

  .header-actions {
    justify-content: center;
    flex-wrap: wrap;
  }

  /* Controls */
  .controls {
    flex-direction: column;
  }

  .controls button {
    width: 100%;
  }

  /* Simulation blocks */
  .sim-upper,
  .sim-lower {
    padding: 15px;
  }

  .placeholder {
    height: auto;
    min-height: 250px;
  }

  /* SVG handling */
  .svg-container {
    margin: 15px auto;
    width: 100%;
    height: 250px;
  }

  .svg-container svg {
      pointer-events: all;
  cursor: pointer;
    max-width: 100%;
    height: auto;
  }

  /* Graph */
  .graph {
    width: 90%;
    top: 50%;
    right: 0%;
    position: fixed;
    min-width: unset;
  }

  /* Modal */
  .modal {
    width: 90%;
  }

  /* Heading inside placeholder */
  .placeholder #heading {
    left: 50%;
    transform: translateX(-50%);
    font-size: 16px;
  }
}




/* ================= PARAMETER BLOCK ================= */
/* Main container */
.parameter-block {
    width: 100%;
    margin-top: 16px;
    padding: 16px;
    background: #2563eb;
    border-radius: 12px;
    box-sizing: border-box;
}

/* Title */
.param-title {
    color: #ffffff;
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 14px;
    text-align: center;
}

/* Horizontal row */
.param-row-horizontal {
    display: flex;
    gap: 12px;
    width: 100%;
    flex-wrap: wrap; /* responsive */
}

/* Each block */
.param-cell {
    flex: 1;
    min-width: 150px;
    background: rgba(255, 255, 255, 0.18);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
}

/* Label */
.param-label {
    display: block;
    font-size: 14px;
    color: #ffffff;
    opacity: 0.9;
    margin-bottom: 6px;
}

/* Value */
.param-value {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
}





















/* Modal Background */
.formula-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

/* Popup Box */
.formula-box {
  background: #f8fbff;
  width: 420px;
  max-width: 90%;
  padding: 20px 24px;
  border-radius: 14px;
  position: relative;
  box-shadow: 0 25px 60px rgba(0,0,0,0.35);
  animation: scaleIn 0.25s ease;
}

/* Close Button */
.close-btn {
  position: absolute;
  right: 14px;
  top: 10px;
  font-size: 18px;
  cursor: pointer;
  color: #555;
}

.close-btn:hover {
  color: #e11d48;
}

/* Title */
.formula-box h3 {
  margin-bottom: 14px;
  color: #1e293b;
}

/* Content */
.formula-content p {
  font-size: 14px;
  margin: 6px 0;
  color: #334155;
}

/* Formula Styling */
.formula {
  font-size: 18px;
  font-weight: 600;
  margin: 8px 0 6px;
}

/* Fraction Styling */
.frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  font-size: 16px;
}

.frac span:first-child {
  border-bottom: 1px solid #000;
  padding: 0 4px;
}

/* Animation */
@keyframes scaleIn {
  from {
    transform: scale(0.9);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}
/* this is the code for crrack */


.crack{
height: 70%;
    width: 20%;
    background: rgb(255, 255, 255);
    position: absolute;
    margin: 15px;
    padding: 10px;
    left: 50%;
    top: 12%;
    border-radius: 10px;
    border: 1px solid black;
     /* display: none; */
}

.crack h1{
  text-align: center;
  font-size: 5px;
  font-weight: 600;
  border: 1px solid black;
  color: rgb(0, 0, 0);
}


.crack .img{

  height: 500px;
  width: 100%;
  max-width: 500px;
  max-height: 600px;
  border-radius: 10px;
  justify-content: center;
  padding: 5px;
  margin: 5px;
  transform: translate(1px, 1px);
}
.crack .img img{
  
  height: auto;
  display: block;
    object-fit: contain;
  width: 90%;
  transform: scale(1.9);   /* 2 = double size */
  
  image-rendering: auto;
  will-change: contents;
}


/* Startup Overlay */
.startup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

/* Popup Box */
.startup-modal {
  background: #fff;
  padding: 25px 30px;
  border-radius: 10px;
  width: 380px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.startup-modal h2 {
  margin-bottom: 10px;
}

.startup-modal p {
  margin-bottom: 20px;
  color: #555;
}

/* Options */
.option {
  display: block;
  text-align: left;
  margin-bottom: 12px;
  font-size: 15px;
  cursor: pointer;
}

.option input {
  margin-right: 8px;
}


.input-row .range{
  font-size: 2vh;
  font-weight: 700;
  font:bold;
  white-space: nowrap;
}































.indent-panel {
  margin-top: 10px;
  padding: 9px;
  background: #f9f9f9;
  border-radius: 8px;
  display: none;
}

.input-row {
  margin-bottom: 12px;
}

.input-unit {
  display: flex;
  align-items: center;
}

.input-unit input {
  flex: 1;
  padding: 2px;
  width: 5px;
}

.input-unit span {
  margin-left: 6px;
  font-weight: bold;
}

#submitIndent:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
#Popupbtn{
  background: linear-gradient(to right ,rgb(25, 66, 215) ,rgb(11, 106, 213));
  border:2px solid royalblue;
  font: uppercase;
  color: white;
  padding: 10px 10px;
  font-size: 15px;
  border-radius: 10px ;

}

































/* Center everything inside formula box */
.formula-content {
  text-align: center;
  font-size: 18px;
}

/* Center formulas and align fractions properly */
.formula {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 22px;
  margin: 12px 0;
}

/* Proper fraction styling */
.frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.15;
  vertical-align: middle;
}

.frac span {
  padding: 0 4px;
}

.frac .top {
  border-bottom: 2px solid #000;
  padding-bottom: 3px;
}

.frac .bottom {
  padding-top: 3px;
}

/* Subscript fix */
sub {
  font-size: 70%;
  vertical-align: -0.3em;
}






















/* RESULT POPUP — High Contrast Beautiful Theme */
.result-modal .result-box {
  background: #c6d4f5;
  color: #000000;
  border: 2px solid #3c3f4a;
  max-height: 85vh;
  overflow-y: auto;
  border-radius: 10px;
  box-shadow: 0 0 25px rgba(0,0,0,0.5);
}

/* Table Look */
.result-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 15px;
  background: #899dcc;
  border: 1px solid #444b57;
  font-size: 16px;
  color: #000000;
}

.result-table th {
  background: #899dcc;
  padding: 10px;
  border: 1px solid #4d5566;
  color: #000000;
  font-weight: 600;
}

.result-table td {
  padding: 10px 14px;
  border: 1px solid #4d5566;
  background: #899dcc;
}

.result-table tr:nth-child(even) td {
  background: #899dcc;
}

/* Slide Controls */
.result-slides .slide {
  display: none;
}

.result-slides .active {
  display: block;
}

.result-nav-btn,
.result-next-btn {
  margin-top: 20px;
  padding: 10px 18px;
  background: #4c8bf5;
  border: none;
  color: white;
  cursor: pointer;
  border-radius: 6px;
  font-size: 15px;
  display: inline-block;
}

.result-nav-btn:hover,
.result-next-btn:hover {
  background: #3b73d4;
}

.back-btn {
  background: #5f6368;
  margin-right: 10px;
}

.back-btn:hover {
  background: #4b4f54;
}

/* Image */
.result-image {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 15px;
}

/* CONCLUSION POPUP */
.conclusion-modal .conclusion-box {
  background: #ffffff;
  color: #222;
  border: 2px solid #d9d9d9;
  max-height: 80vh;
  overflow-y: auto;
}

.conclusion-content p {
  background: #f7f9fc;
  border-left: 5px solid #4a90e2;
  padding: 10px 14px;
  margin-bottom: 12px;
  border-radius: 6px;
  line-height: 1.6;
}



















































.formula-equation-box {
  background: #8b8b2f;
  padding: 10px 20px;
  color: black;
  display: inline-block;
  font-size: 22px;
  border-radius: 4px;
  font-weight: 600;
}

.formula-list {
  list-style: disc;
  margin-left: 25px;
  color: #d0d09c;
  font-size: 16px;
}

.formula-list li {
  margin-bottom: 6px;
  background: #8b8b2f;
  padding: 3px 8px;
  display: inline-block;
  border-radius: 4px;
  color: black;
}