* {
    box-sizing: border-box;
  }
  
body {
  background-color: #aaa;
  color: #333;
  font-family: Arial, sans-serif;
  margin: 0;
}

main {
  background-color: #fff;
  padding: 25px;
  margin: 20px auto;
  max-width: 800px;
  box-shadow: 0 0 10px #00000080;
  border-radius: 20px;
}

p {
  margin: 0;
}

h1 {
  text-align: center;
}

.row {
  margin-left:-5px;
  margin-right:-5px;
}
  
.column {
  float: left;
  padding: 5px;
}

/* Clearfix (clear floats) */
.row::after {
  content: "";
  clear: both;
  display: table;
}

table {
  border-collapse: collapse;
  border-spacing: 1;
  width: 100%;
  border: 2px solid #444;
}

th {
  text-align: center;
  padding: 4px;
  border-bottom: 1px solid #444;
}

td {
  text-align: center;
  padding: 4px;
  border-bottom: 1px solid #bbb;
}

tr:hover {
  background-color: #eee;
}

.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 200px;
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -100px;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip .tooltiptext::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: #555 transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

#textInput, #fileInput, #linkInput, #sampleInput {
  border: 2px solid #ccc;
  border-radius: 6px;
  padding: 10px;
}