html[data-theme="light"] {
  background: #f5f5ff;
  color: #000033;
}
html[data-theme="dark"] {
  background: #000000;
  color: #00ff00;
}
body {
  font-family: "Courier New", Courier, monospace;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: all 0.3s;
}
header {
  background: #ddddff;
  padding: 1em;
  text-align: center;
  border-bottom: 2px solid #9999cc;
  position: relative;
}
html[data-theme="dark"] header {
  background: #111111;
  border-bottom: 2px solid #00aa00;
}
header h1 {
  margin: 0;
  font-size: 2em;
  color: #0000cc;
}
html[data-theme="dark"] header h1 {
  color: #00ffff;
}
#theme-toggle {
  position: absolute;
  right: 1em;
  top: 1em;
  padding: 0.5em 1em;
  font-size: 1em;
  background: #ffffff;
  color: #000033;
  border: 1px solid #9999cc;
  cursor: pointer;
  transition: all 0.3s;
}
html[data-theme="dark"] #theme-toggle {
  background: #001100;
  color: #00ff00;
  border: 1px solid #00aa00;
}
.tab-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  background: #ddddff;
  border-bottom: 2px solid #9999cc;
}
html[data-theme="dark"] .tab-buttons {
  background: #111111;
  border-bottom: 2px solid #00aa00;
}
.tab-buttons button {
  padding: 1em;
  background: #ddddff;
  color: #000033;
  border: none;
  cursor: pointer;
  font-size: 1.2em;
  flex: 1 1 auto;
  position: relative;
  transition: all 0.3s;
}
html[data-theme="dark"] .tab-buttons button {
  background: #111111;
  color: #00ff00;
}
.tab-buttons button:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: 1px;
  background: #9999cc;
}
html[data-theme="dark"] .tab-buttons button:not(:last-child)::after {
  background: #00aa00;
}
.tab-buttons button.active {
  background: #eeeeff;
  font-weight: bold;
  border-bottom: 2px solid #0000cc;
}
html[data-theme="dark"] .tab-buttons button.active {
  background: #222222;
  border-bottom: 2px solid #00ffff;
}
.tab-content {
  display: none;
  padding: 1em;
  background: #f5f5ff;
  flex: 1;
}
html[data-theme="dark"] .tab-content {
  background: #000000;
}
.tab-content.active {
  display: block;
}
.card {
  background: #ffffff;
  border: 1px solid #9999cc;
  padding: 1em;
  margin-bottom: 1em;
  border-radius: 4px;
}
html[data-theme="dark"] .card {
  background: #001100;
  border: 1px solid #00aa00;
}
.card2 {
  background: #ffffff;
  border: 1px solid #9999cc;
  padding: 0em;
  margin-bottom: 1em;
  border-radius: 1px;
}
html[data-theme="dark"] .card2 {
  background: #001100;
  border: 1px solid #00aa00;
}
.card h2, .card2 h2 {
  margin-top: 2;
  color: #0000cc;
  font-size: 1.5em;
}
html[data-theme="dark"] .card h2, html[data-theme="dark"] .card2 h2 {
  color: #00ffff;
}
.card h3 {
  margin-top: 0;
  color: #0000cc;
  font-size: 1.3em;
}
html[data-theme="dark"] .card h3 {
  color: #00ffff;
}
.card p {
  font-size: 1.2em;
}
.card ul {
  font-size: 1.3em;
}
.card ul a {
  font-size: inherit;
}
a {
  color: #0000cc;
  text-decoration: none;
}
html[data-theme="dark"] a {
  color: #ffff00;
}
a:hover {
  text-decoration: underline;
}
footer {
  text-align: center;
  padding: 1em;
  font-size: 0.9em;
  color: #000033;
  border-top: 2px solid #9999cc;
}
html[data-theme="dark"] footer {
  color: #00ff00;
  border-top: 2px solid #00aa00;
}