spectrogram-table.css

/*
# Copyright (c) 2020, lowkey digital studio
# Author: Nathan Wolek
# Usage of this file and its contents is governed by the MIT License

# Adapted from CodePen example
# source here: https://codepen.io/paulobrien/pen/LBrMxa
# original author: Paul O'Brien
*/

html {
  box-sizing: border-box;
}
*,
*:before,
*:after {
  box-sizing: inherit;
}
.intro {
  max-width: 1280px;
  margin: 1em auto;
}
.table-scroll {
  position: relative;
  width:100%;
  z-index: 1;
  margin: auto;
  overflow: auto;
  height: 720px; /* changed to increase height */
}
.table-scroll table {
  width: 100%;
  min-width: 1280px;
  margin: auto;
  border-collapse: separate;
  border-spacing: 0;
}
.table-wrap {
  position: relative;
}
.table-scroll th,
.table-scroll td {
  padding: 5px 10px;
  border: 1px solid #000;
  background: #fff;
  vertical-align: top;
  text-align: center; /* added to center td contents */
}
.table-scroll td.start-of-week { /* added to mark sunday as start of week */
  background: #ffc2df;
}
.table-scroll th.start-of-hour { /* added to mark 00 minutes as start of hour */
  background: #c2dfff;
}
.table-scroll thead th {
  background: #333;
  color: #fff;
  position: -webkit-sticky;
  position: sticky;
  top: 0;
}
/* safari and ios need the tfoot itself to be position:sticky also */
.table-scroll tfoot,
.table-scroll tfoot th,
.table-scroll tfoot td {
  position: -webkit-sticky;
  position: sticky;
  bottom: 0;
  background: #666;
  color: #fff;
  z-index:4;
}

a:focus {
  background: red;
} /* testing links*/

th:first-child {
  position: -webkit-sticky;
  position: sticky;
  left: 0;
  z-index: 2;
  background: #ccc;
}
thead th:first-child,
tfoot th:first-child {
  z-index: 5;
}