/* Theme variables */
:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --link-color: #1772d0;
  --link-hover-color: #f09228;
  --icon-color: #333;
  --icon-hover-bg: #f0f0f0;
  --highlight-bg: #ffffd0;
}

[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --text-color: #ffffff;
  --link-color: #66b3ff;
  --link-hover-color: #ff9f4d;
  --icon-color: #cccccc;
  --icon-hover-bg: #333333;
  --highlight-bg: #2d2d1a;
}

/* Apply theme colors */
body {
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

a:focus,
a:hover {
  color: var(--link-hover-color);
  text-decoration: none;
}

body,
td,
th,
tr,
p,
a {
  font-family: 'Lato', Verdana, Helvetica, sans-serif;
  font-size: 16px;
}

strong {
  font-family: 'Lato', Verdana, Helvetica, sans-serif;
  font-size: 16px;
}

h2 {
  margin: 0;
  font-weight: normal;
  font-family: 'Lato', Verdana, Helvetica, sans-serif;
  font-size: 26px;
}

.papertitle {
  font-family: 'Lato', Verdana, Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 700;
}

.name {
  padding-top: 20px;
  margin: 0;
  font-family: 'Lato', Verdana, Helvetica, sans-serif;
  font-size: 38px;
}

.one {
  width: 160px;
  height: 160px;
  position: relative;
}

.two {
  width: 160px;
  height: 160px;
  position: absolute;
  transition: opacity .2s ease-in-out;
  -moz-transition: opacity .2s ease-in-out;
  -webkit-transition: opacity .2s ease-in-out;
}

.fade {
  transition: opacity .2s ease-in-out;
  -moz-transition: opacity .2s ease-in-out;
  -webkit-transition: opacity .2s ease-in-out;
}

span.highlight {
  background-color: var(--highlight-bg);
}

.colored-box {
    color: black;
    padding: 20px;
    display: inline-block;
    border-radius: 10px;
}

/* Icon styles */
.fas, .fab {
  font-size: 1.1em;
  margin-right: 4px;
  color: var(--icon-color);
  transition: color 0.3s ease;
}

/* Social Links */
.social-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  margin: 15px 0;
}

.social-item {
  display: inline-flex;
  align-items: center;
}

.social-item a {
  color: var(--icon-color);
  text-decoration: none;
  padding: 8px;
  border-radius: 50%;
  transition: color 0.3s ease;
}

.social-item a:hover,
.social-item a:hover .fas,
.social-item a:hover .fab {
  color: #1772d0;
}

.social-item .fas,
.social-item .fab {
  font-size: 1.4em;
  margin: 0;
}

/* Update existing icon styles */
.fas, .fab {
  color: var(--icon-color);
  transition: color 0.3s ease;
}

tr[bgcolor="#ffffd0"] {
  background-color: var(--highlight-bg);
}

/* Theme toggle button styles */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  transition: background-color 0.3s ease;
  z-index: 1000;
}

.theme-toggle:hover {
  background-color: var(--icon-hover-bg);
}

.theme-toggle i {
  font-size: 1.5em;
  color: var(--icon-color);
}