html {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  /*  background: #1f1f1f; */
  background: #dfdfdf;
  color: black;
}

body {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;

  max-width: 60em;
  height: 100%;
  margin: auto;
  padding: 0;
  background-color: white;
  font: 16px "Lucida Grande", Helvetica, Arial, sans-serif;
}

header {
  display: flex;
  flex-direction: column;
  padding-top: 1rem;
  width: 100%;
  text-align: center;
}

.logos {
  max-height: 64px;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-bottom: 1rem;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

#tu-logo img {
  min-width: 36mm;
}

#hylec-logo img {
  max-height: 64px;
}

#inf-logo {
  width: 128px;
}

h1 {
  padding-top: 1rem;
  padding-bottom: 1rem;
  background-color: #639a00;
  width: 100%;
  color: white;
  font-size: 2.5rem;
  margin: auto;
}

main {
  margin-left: auto;
  margin-right: auto;
  padding-left: 2rem;
  padding-right: 2rem;
  background: white;
  height: 100%;
}

a {
  color: #00b7ff;
}

main p {
  line-height: 1.5rem;
}

.columns {
  display: flex;
  flex-direction: row;
  justify-content: space-evenly;
  align-items: flex-end;
  column-gap: 1rem;
}

.column {
  flex-grow: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.large {
  font-size: 2rem;
}

.huge {
  font-size: 8rem;
}

button {
  border-radius: 0.5rem;
  border: 1px solid #ca7406;
  background-color: #639a00;
  color: white;
  padding: 1rem;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background-color: #404040;
}

button:active {
  background-color: #808080;
}

a.button-like {
  display: block;
  border-radius: 0.5rem;
  border: 1px solid #ca7406;
  background-color: #639a00;
  color: white;
  padding: 1rem;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
}

a.button-like:hover {
  background-color: #404040;
}

a.button-like:active {
  background-color: #808080;
}

.join {
  display: flex;
  flex-direction: column;
  row-gap: 1rem;
}

input {
  font-size: 2rem;
}

@keyframes ping {
  0% {
    background: white;
    outline-offset: 0.25rem;
  }
  33% {
    outline-offset: 0.5rem;
  }
  100% {
    outline-offset: 0.25rem;
  }
}

:focus {
  outline: 2px solid #ca7406;
  outline-offset: 0.25rem;
  animation: ping 0.33s linear;
}