* {
    margin: 0;
    padding: 0;
    font-family: Verdana;
}

.container{
  display: grid;
  grid-template-columns: 1fr ;
  position : relative  ; 
  top : 80px ; 

}
.button_container{
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap : 2px ; 
}

header {
    background-color: black;
    height: 91.6px;
    background-size: cover;
    background-position: center;
    border-bottom: #dbca08 6px solid;
}

ul {
    padding-top: 20px;
    float: right;
    list-style-type: none;
    margin-top: 25px;
}

ul li {
    display: inline-block;
}

ul li a {
    text-decoration: none;
    color: #fff;
    padding: 5px 20px;
    border: 1px solid transparent;
    transition: 0.8s ease;
}

ul li a:hover {
    background-color: #fff;
    color: #000;
}

ul li.active a {
    background-color: #fff;
    color: #000;
}
.logo img {
   
   
   float: left;
    width: 220px;
    height: 90px;
    left: -50px;
    position: absolute;
}
.title{
  align-items: center;
  justify-content: center;   
}

.title h1 {
    color: #fff;
    font-size: 70px;
}
.grid{
  justify-self: end;
  /* border : 2px solid black;  */
  padding : 10px ; 
  margin : 30px ; 
}
.canvas{
  justify-self: start;
 /* border : 2px solid black ;  */
 padding : 10px ; 
 margin : 30px ; 
}

.button {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.btn {
  border: 2px solid cyan;
  /* background-color: green; */
  color: white;
  padding: 14px 28px;
  font-size: 16px;
  cursor: pointer;
  
}
a:hover {
  background-color: cyan;
}
.button {
    position: absolute;
    top: 60%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.accordion {
    background-color: #eee;
    color: #444;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 15px;
    transition: 0.4s;
}

.bg {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
    url(algovisualization.jpg);
    height: 100vh;
    background-size: cover;
    background-position: center;
}

footer {
    background-color: #000;
    text-align: center;
    color: #eee;
    padding-bottom: 10px;
    padding-top: 10px;
    position: relative;
    top : 280px ; 
}
 html {
  height: 100%;
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
}

body {
  min-height: 100%;
  position: relative;
  padding-bottom: 3rem;
  margin: 0;
  padding: 0;
  text-align: center;
  width: 100%;
  background: linear-gradient(170deg, rgba(49, 57, 73, 0.8) 20%, rgba(49, 57, 73, 0.5) 20%, rgba(49, 57, 73, 0.5) 35%, rgba(41, 48, 61, 0.6) 35%, rgba(41, 48, 61, 0.8) 45%, rgba(31, 36, 46, 0.5) 45%, rgba(31, 36, 46, 0.8) 75%, rgba(49, 57, 73, 0.5) 75%), linear-gradient(45deg, rgba(20, 24, 31, 0.8) 0%, rgba(41, 48, 61, 0.8) 50%, rgba(82, 95, 122, 0.8) 50%, rgba(133, 146, 173, 0.8) 100%) #313949;
  font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

/*
 * Animated CSS button
 * Copyright Alexander Bodin 2019-09-07
 *
 * Useage: .class {@import button($button-size, $hue, $sat);}
 */
 
.animated-button {
  background: linear-gradient(-30deg, #0b1b3d 50%, #08142b 50%);
  padding: 20px 40px;
  margin: 12px;
  display: inline-block;
  -webkit-transform: translate(0%, 0%);
          transform: translate(0%, 0%);
  overflow: hidden;
  color: #d4e0f7;
  font-size: 20px;
  letter-spacing: 2.5px;
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  -webkit-box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
          box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.animated-button::before {
  content: '';
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  background-color: #8592ad;
  opacity: 0;
  -webkit-transition: .2s opacity ease-in-out;
  transition: .2s opacity ease-in-out;
}

.animated-button:hover::before {
  opacity: 0.2;
}

.animated-button span {
  position: absolute;
}

.animated-button span:nth-child(1) {
  top: 0px;
  left: 0px;
  width: 100%;
  height: 2px;
  background: -webkit-gradient(linear, right top, left top, from(rgba(8, 20, 43, 0)), to(#2662d9));
  background: linear-gradient(to left, rgba(8, 20, 43, 0), #2662d9);
  -webkit-animation: 2s animateTop linear infinite;
          animation: 2s animateTop linear infinite;
}

@-webkit-keyframes animateTop {
  0% {
    -webkit-transform: translateX(100%);
            transform: translateX(100%);
  }
  100% {
    -webkit-transform: translateX(-100%);
            transform: translateX(-100%);
  }
}

@keyframes animateTop {
  0% {
    -webkit-transform: translateX(100%);
            transform: translateX(100%);
  }
  100% {
    -webkit-transform: translateX(-100%);
            transform: translateX(-100%);
  }
}

.animated-button span:nth-child(2) {
  top: 0px;
  right: 0px;
  height: 100%;
  width: 2px;
  background: -webkit-gradient(linear, left bottom, left top, from(rgba(8, 20, 43, 0)), to(#2662d9));
  background: linear-gradient(to top, rgba(8, 20, 43, 0), #2662d9);
  -webkit-animation: 2s animateRight linear -1s infinite;
          animation: 2s animateRight linear -1s infinite;
}

@-webkit-keyframes animateRight {
  0% {
    -webkit-transform: translateY(100%);
            transform: translateY(100%);
  }
  100% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
}

@keyframes animateRight {
  0% {
    -webkit-transform: translateY(100%);
            transform: translateY(100%);
  }
  100% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
}

.animated-button span:nth-child(3) {
  bottom: 0px;
  left: 0px;
  width: 100%;
  height: 2px;
  background: -webkit-gradient(linear, left top, right top, from(rgba(8, 20, 43, 0)), to(#2662d9));
  background: linear-gradient(to right, rgba(8, 20, 43, 0), #2662d9);
  -webkit-animation: 2s animateBottom linear infinite;
          animation: 2s animateBottom linear infinite;
}

@-webkit-keyframes animateBottom {
  0% {
    -webkit-transform: translateX(-100%);
            transform: translateX(-100%);
  }
  100% {
    -webkit-transform: translateX(100%);
            transform: translateX(100%);
  }
}

@keyframes animateBottom {
  0% {
    -webkit-transform: translateX(-100%);
            transform: translateX(-100%);
  }
  100% {
    -webkit-transform: translateX(100%);
            transform: translateX(100%);
  }
}

.animated-button span:nth-child(4) {
  top: 0px;
  left: 0px;
  height: 100%;
  width: 2px;
  background: -webkit-gradient(linear, left top, left bottom, from(rgba(8, 20, 43, 0)), to(#2662d9));
  background: linear-gradient(to bottom, rgba(8, 20, 43, 0), #2662d9);
  -webkit-animation: 2s animateLeft linear -1s infinite;
          animation: 2s animateLeft linear -1s infinite;
}

@-webkit-keyframes animateLeft {
  0% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
  100% {
    -webkit-transform: translateY(100%);
            transform: translateY(100%);
  }
}

@keyframes animateLeft {
  0% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
  100% {
    -webkit-transform: translateY(100%);
            transform: translateY(100%);
  }
}

.animated-button1 {
  background: linear-gradient(-30deg, #3d0b0b 50%, #2b0808 50%);
  padding: 20px 40px;
  margin: 12px;
  display: inline-block;
  -webkit-transform: translate(0%, 0%);
          transform: translate(0%, 0%);
  overflow: hidden;
  color: #f7d4d4;
  font-size: 20px;
  letter-spacing: 2.5px;
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  -webkit-box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
          box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
          
}

.animated-button1::before {
  content: '';
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
  background-color: #ad8585;
  opacity: 0;
  -webkit-transition: .2s opacity ease-in-out;
  transition: .2s opacity ease-in-out;
}

.animated-button1:hover::before {
  opacity: 0.2;
}

.animated-button1 span {
  position: absolute;
}


.animated-button1 span:nth-child(1) {
  top: 0px;
  left: 0px;
  width: 100%;
  height: 2px;
  background: -webkit-gradient(linear, right top, left top, from(rgba(43, 8, 8, 0)), to(#d92626));
  background: linear-gradient(to left, rgba(43, 8, 8, 0), #d92626);
  -webkit-animation: 2s animateTop linear infinite;
          animation: 2s animateTop linear infinite;
}

@keyframes animateTop {
  0% {
    -webkit-transform: translateX(100%);
            transform: translateX(100%);
  }
  100% {
    -webkit-transform: translateX(-100%);
            transform: translateX(-100%);
  }
}

.animated-button1 span:nth-child(2) {
  top: 0px;
  right: 0px;
  height: 100%;
  width: 2px;
  background: -webkit-gradient(linear, left bottom, left top, from(rgba(43, 8, 8, 0)), to(#d92626));
  background: linear-gradient(to top, rgba(43, 8, 8, 0), #d92626);
  -webkit-animation: 2s animateRight linear -1s infinite;
          animation: 2s animateRight linear -1s infinite;
}

@keyframes animateRight {
  0% {
    -webkit-transform: translateY(100%);
            transform: translateY(100%);
  }
  100% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
}

.animated-button1 span:nth-child(3) {
  bottom: 0px;
  left: 0px;
  width: 100%;
  height: 2px;
  background: -webkit-gradient(linear, left top, right top, from(rgba(43, 8, 8, 0)), to(#d92626));
  background: linear-gradient(to right, rgba(43, 8, 8, 0), #d92626);
  -webkit-animation: 2s animateBottom linear infinite;
          animation: 2s animateBottom linear infinite;
}

@keyframes animateBottom {
  0% {
    -webkit-transform: translateX(-100%);
            transform: translateX(-100%);
  }
  100% {
    -webkit-transform: translateX(100%);
            transform: translateX(100%);
  }
}

.animated-button1 span:nth-child(4) {
  top: 0px;
  left: 0px;
  height: 100%;
  width: 2px;
  background: -webkit-gradient(linear, left top, left bottom, from(rgba(43, 8, 8, 0)), to(#d92626));
  background: linear-gradient(to bottom, rgba(43, 8, 8, 0), #d92626);
  -webkit-animation: 2s animateLeft linear -1s infinite;
          animation: 2s animateLeft linear -1s infinite;
}

@keyframes animateLeft {
  0% {
    -webkit-transform: translateY(-100%);
            transform: translateY(-100%);
  }
  100% {
    -webkit-transform: translateY(100%);
            transform: translateY(100%);
  }
}