body{background-color: #33ECFF;}
figure {
  border: 1px #cccccc solid;
  padding: 4px;
  margin: auto;
}

figcaption {
  background-color: black;
  color: white;
  font-style: italic;
  padding: 2px;
  text-align: center;
}
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
  background-color: #04AA6D;
  color: white;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}
h1,h2,h3,h4{text-align: center; color: red;}
.art01{padding-left:20px; margin-left: 20px;}
.art02 img {
  width: 35%;
  height: auto;
  float: left; 
  max-width: 220px;
}

.blur {filter: blur(4px);}
.brightness {filter: brightness(250%);}
.contrast {filter: contrast(180%);}
.grayscale {filter: grayscale(100%);}
.huerotate {filter: hue-rotate(180deg);}
.invert {filter: invert(100%);}
.opacity {filter: opacity(50%);}
.saturate {filter: saturate(7);}
.sepia {filter: sepia(100%);}
.shadow {filter: drop-shadow(8px 8px 10px green);}
.art03{background-color: pink; border-style: double; border-color:orange;}
#box01{padding-left: 50px; border-style: solid; border-color:red; margin: 20px; background-color:#FFC300;}
footer{background-color:rgb(0,0,0); color: white; text-align: center; height: 200px;}