@font-face {
  font-family: "Signifier";
  src: url("public/signifier/Signifier-Regular.ttf");
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: "Signifier";
  src: url("public/signifier/Signifier-Italic.ttf");
  font-weight: normal;
  font-style: italic;
}

@font-face {
  font-family: "Signifier";
  src: url("public/signifier/Signifier-Bold.ttf");
  font-weight: bold;
  font-style: normal;
}

@font-face {
  font-family: "Signifier";
  src: url("public/signifier/Signifier-BoldItalic.ttf");
  font-weight: bold;
  font-style: italic;
}

html,
body {
  font-family: "Signifier", serif;
  overflow: hidden;
  margin: 0;
  padding: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  background-image: linear-gradient(
      to right,
      rgba(200, 200, 200, 0.4) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, rgba(200, 200, 200, 0.4) 1px, transparent 1px);
  background-size: 3vw 3vw;
}

header,
footer {
  font-size: 1.5em;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 20px;
}

.main {
  flex: 1;
  display: flex;
  align-items: center;
}

header a,
footer a {
  margin-left: 20px;
}

ul {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

.topics {
  font-size: 2.5em;
  flex: 1;
  justify-content: flex-begin;
  align-items: center;
}

.topic {
  margin-bottom: 25px;
  transition: color 0.5s ease;
}

.topic.software:hover {
  color: #0073e6;
}
.topic.economics:hover {
  color: #009975;
}
.topic.trading:hover {
  color: #d50032;
}
.topic.interview-problems:hover {
  color: #6a0dad;
}

.logo {
  height: 40px;
}

.topic a {
  position: relative;
  display: inline-block;
  color: inherit;
  text-decoration: none;
}

.topic a::after {
  content: "";
  height: 2px;
  display: block;
  margin-top: 4px;
  background: currentColor;
  transition:
    width 0.5s ease,
    right 0.5s ease;
}

.topic a:hover::after {
  width: 100%;
  right: 0;
}

.topic a:not(:hover)::after {
  width: 0;
  right: 100%;
}