body{
    margin:0;
    padding-top:60px;
    font-family:Arial;
}

/* NAVBAR */

.navbar{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:60px;
    background:#000000;
    color:white;

    display:flex;
    align-items:center;
    justify-content:space-between;

    padding:0 20px;
    box-sizing:border-box;

    z-index:9999;
}

.nav-left{
    display:flex;
    align-items:center;
    gap:10px;
}

.home img{
    height:50px;
    width:auto;
}

.site-name{
    font-size:20px;
    font-weight:bold;
}




.nav-right {
    display: flex;
    align-items: center;
}

/* button styling */
.nav-button {
    background: #002faf;
    color: white;
    padding: 8px 14px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
    margin-left: 10px; /* spacing from edge */
    transition: 0.2s;
}






/* Hide animation */

.hidden{
    transform:translateY(-100%);
    transition:transform 0.3s;
}






/* Toggle button */

#toggleBtn{
    position:fixed;
    top:10px;
    right:10px;

    background:#000000;
    border:none;
    color:white;
    padding:8px 14px;
    cursor:pointer;
    border-radius:5px;

    z-index:9930;
}

/* Gme iframe */

.lesson-frame{
    width:100%;
    height:calc(100vh - 60px);
    border:none;
}








/* button for apps */

.row-seperator {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); /* min width 150px, auto-fill horizontally */
    gap: 20px;             /* space between buttons */
    justify-content: center; /* center the grid */
    padding: 0 10px;
    margin-bottom: 20px;   /* space to next section */
    box-sizing: border-box;
}

.mathbutton {
    display: block;
    width: 100%;          /* take full width of grid cell */
    max-width: 200px;     /* optional limit */
    height: 40px;
    line-height: 40px;     /* vertical centering */
    text-align: center;
    background: #d5d5d5;
    color: rgb(22, 22, 22);
    border-radius: 8px;
    text-decoration: none;
    font-size: 15px;
    transition: 0.2s;
    box-sizing: border-box; /* include padding in width */
}

.mathbutton:hover {
    background: #2300a0;
    transform: scale(1.05);
}





    /* end */


.line
{height:3px;
    border-width:0;
    color:gray;
    background-color:gray
}


.mascot {
    display: flex;
    flex-direction: column; /* stack image and button vertically */
    align-items: flex-end;  /* right-align */
    margin-top: 0px;
}

.mascot img {
    width: 200px; /* or any responsive width */
    max-width: 100%;
    height: auto;
}

.mascotbutton {
    display: block;
    width: 200px;              /* takes the width of the parent (.mascot) */
    text-align: center;       /* centers the text */
    background: #002faf;
    color: white;
    border-radius: 8px;
    padding: 8px 0;           /* vertical padding */
    margin-top: 10px;         /* spacing under image */
    text-decoration: none;
    font-size: 15px;
    transition: 0.2s;
}

.mascotbutton:hover {
    background: #2300a0;
    transform: scale(1.05);
}

 
.bgm {
    background-image: url("images/bgimg.jpg");
    background-size: cover;        /* fills the area nicely */
    background-position: center;   /* keeps it centered */
    background-repeat: no-repeat;

    padding: 20px; /* space so content isn't cramped */
}



/* SITE SETTINGS */


html, body {
    background-color: #000000;
    color: white;
}


/* End  */
.linev2
{height:5px;
    border-width:0;
    color:rgb(211, 211, 211);
    background-color:rgb(197, 197, 197);
}



/* previewer of apps */

#preview-box {
  position: absolute;
  width: 300px;
  height: 300px; /* iframe height */
  background: #111;
  color: white;
  padding: 5px;
  border-radius: 10px;
  display: block;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 10000;
  box-shadow: 0 6px 20px rgba(0,0,0,0.6);
}

#preview-box.show {
  opacity: 1;
}

#preview-iframe {
  width: 100%;
  height: 85%;
  border: none;
  border-radius: 8px;
  flex-shrink: 0;
  will-change: transform;

  #preview-text {
    margin-top: 10px;
    font-size: 8px;
    text-align: center;
    flex-grow: 1;
    overflow: hidden;
  }
}









/* popup.css */

/* The overlay background */
#overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
}

#popup {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: white;
  padding: 10px;
  border-radius: 8px;
  cursor: move;
  z-index: 1001;
  max-width: 90vw;  /* so it never exceeds screen width */
  max-height: 90vh; /* so it never exceeds screen height */
}

#popup img {
  max-width: 300px;
  max-height: 300px;
  display: block;
}

#closeBtn {
  position: absolute;
  top: 5px;
  right: 10px;
  cursor: pointer;
  font-size: 18px;
  background: red;
  color: white;
  border: none;
  border-radius: 4px;
}


#popup iframe {
  width: 600px;     /* default width */
  height: 400px;    /* default height */
  display: block;
  border-radius: 8px;
  max-width: 100%;  /* responsive width */
  max-height: 80vh; /* responsive height */
}