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HTML

<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">
  <title>Andev web</title>
  <link rel="stylesheet" href="./style.css">

</head>
<body>
<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>
		Controlled Brightness in a Lamp
	</title>
	<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>

CSS

:root {
    --border-color: #482896;
    --shadow-color: #734bd4;
    --main-bg-color: #8357eb;
    --secondary-bg-color: #986ef1;
    --lamp-light-color: #c791e5;
    --lamp-dark-color: #f679d2;
    --rope-color: #9938b8;
    --icon-color: #ebe4f1;

--lamp-width: 140px;
    --lamp-height: 100px;
    --lamp-top-height: 20px;
  }

body {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    background-color: var(--main-bg-color);
    overflow: hidden;
    width: 100vw;
    height: 100vh;
  }

form {
    margin: 0;
    width: 200px;
    padding: 2em 2.2em;
    border-radius: 4px;
    background: var(--secondary-bg-color);
    box-shadow: 0 5px 15px var(--shadow-color);
  }

.lamp-wrapper {
    position: relative;
    width: 100%;
    justify-content: center;
    display: flex;
  }
  .lamp {
    height: var(--lamp-height);
    width: var(--lamp-width);
    position: relative;
    z-index: 2;
  }

.lamp-part {
    background-color: var(--lamp-dark-color);
    transform: skewX(-5deg);
    height: var(--lamp-height);
    width: 60%;
    position: absolute;
    top: 0;
    left: 0;
  }
  .lamp-part.-body.right {
    transform: skewX(5deg);
    left: auto;
    right: 0;
  }
  .lamp-part.-top {
    background: transparent;
    position: absolute;
    width: calc(var(--lamp-width) - 10px);
    height: var(--lamp-top-height);
    left: 6px;
    top: -17px;
  }
  .lamp-part.-top-part {
    width: 50%;
    height: var(--lamp-top-height);
    left: 0;
    top: 0;
    transform: skewX(-5deg);
    border-radius: 80% 0 0 0;
    border-top: 2px solid var(--border-color);
    border-bottom: none;
  }
  .lamp-part.-top-part.right {
    transform: skewX(5deg);
    left: auto;
    right: 1px;
    border-radius: 0 80% 0 0;
  }
  .lamp-part.-bottom {
    background: linear-gradient(#FFFFFA, #FDFFB2);
    height: calc(var(--lamp-top-height) + 10px);
    width: calc(var(--lamp-width) + 10px);
    position: absolute;
    top: auto;
    bottom: -18px;
    left: -5px;
    border-radius: 50%;
    border-top: 3px solid var(--border-color);
    border-bottom: 2px solid var(--lamp-light-color);
  }
  .lamp-part.-bottom:before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    background: linear-gradient(var(--border-color), var(--lamp-light-color));
    border-radius: 50%;
    width: 100%;
    height: 100%;
    opacity: 1;
  }
  .blub {
    position: absolute;
    width: calc(var(--lamp-width) - 20px);
    height: calc(var(--lamp-height) - 20px);
    top: calc(var(--lamp-top-height) - 10px);
    left: calc(var(--lamp-top-height) - 10px);
    border-radius: 5% 3% 38% 40%;
    background-color: #FFFFFA;
    -webkit-filter: blur(15px);
    filter: blur(15px);
    z-index: 2;
    opacity: 0;
    transition: all 300ms;
  }
  .lamp-rope {
    position: absolute;
    width: 8px;
    height: 1200px;
    background: linear-gradient(var(--border-color) 90%, var(--rope-color));
    bottom: 100%;
    margin: auto;
  }

.wall-light-shadow {
    background: linear-gradient(var(--lamp-light-color), var(--main-bg-color) 30%);
    width: 80%;
    height: 200vh;
    position: absolute;
    top: 150%;
    left: auto;
    border-radius: 50% 50% 0 0;
    -webkit-filter: blur(5px);
    filter: blur(5px);
    z-index: -1;
    opacity: 0;
    transition: all 300ms;
  }

.icon {
    width: 8px;
    height: 8px;
    display: inline-block;
  }

.sun {
    background: var(--icon-color);
    border-radius: 50%;
    position: relative;
    float: left;
    transform: scale(0.8);
  }

.ray {
    background: var(--icon-color);
    width: 2px;
    height: 4px;
    position: absolute;
    left: 3px;
    bottom: 12px;
    transform-origin: 50% calc(100% + 8px);
    border-radius: 50%;
  }

.ray:nth-child(1) {
    transform: rotate(45deg);
  }

.ray:nth-child(2) {
    transform: rotate(90deg);
  }

.ray:nth-child(3) {
    transform: rotate(135deg);
  }

.ray:nth-child(4) {
    transform: rotate(180deg);
  }

.ray:nth-child(5) {
    transform: rotate(225deg);
  }

.ray:nth-child(6) {
    transform: rotate(270deg);
  }

.ray:nth-child(7) {
    transform: rotate(315deg);
  }

.ray:nth-child(8) {
    transform: rotate(360deg);
  }

input[type=range] {
    -webkit-appearance: none;
    width: calc(100% - 30px);
    float: right;
  }

input[type=range]:focus {
    outline: none;
  }

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 2px;
    cursor: pointer;
    background: var(--icon-color);
  }

input[type=range]::-webkit-slider-thumb {
    height: 13px;
    width: 13px;
    border-radius: 50%;
    background: var(--icon-color);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -6px;
  }

input[type=range]:hover::-webkit-slider-thumb {
    box-shadow: 0 0 5px var(--icon-color);
  }

input[type=range]::-moz-range-track {
    width: 100%;
    height: 2px;
    cursor: pointer;
    background: var(--icon-color);
  }

input[type=range]::-moz-range-thumb {
    height: 13px;
    width: 13px;
    border-radius: 50%;
    background: var(--icon-color);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -6px;
  }

input[type=range]::-ms-track {
    width: 100%;
    height: 2px;
    cursor: pointer;
    background: var(--icon-color);
  }

input[type=range]::-ms-thumb {
    height: 13px;
    width: 13px;
    border-radius: 50%;
    background: var(--icon-color);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -6px;
  }

body[data-light^='1'] {
   .blub, .wall-light-shadow {
      opacity: 0.1;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.9;
   }
}
 body[data-light^='2'] {
   .blub,  .wall-light-shadow {
      opacity: 0.2;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.8;
   }
}
 body[data-light^='3'] {
   .blub,  .wall-light-shadow {
      opacity: 0.3;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.7;
   }
}
 body[data-light^='4'] {
   .blub,  .wall-light-shadow {
      opacity: 0.4;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.6;
   }
}
 body[data-light^='5'] {
   .blub,  .wall-light-shadow {
      opacity: 0.5;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.5;
   }
}
 body[data-light^='6'] {
   .blub,  .wall-light-shadow {
      opacity: 0.6;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.4;
   }
}
 body[data-light^='7'] {
   .blub,  .wall-light-shadow {
      opacity: 0.7;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.3;
   }
}
 body[data-light^='8'] {
   .blub,  .wall-light-shadow {
      opacity: 0.8;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.2;
   }
}
 body[data-light^='9'] {
   .blub,  .wall-light-shadow {
      opacity: 0.9;     
   }
   .lamp-part.-bottom:before {
     opacity: 0.1;
   }
}
 body[data-light='10'] {
   .blub,  .wall-light-shadow {
      opacity: 1;     
   }
   .lamp-part.-bottom:before {
     opacity: 0;
   }
}