@import url(/css/bootstrap5/bootstrap.css);
@import url(/css/bootstrap5/bootstrap-icons.css);
@import url(/css/lightbox.css);
@import url(/css/window-tab.css);

:root {
  --theme-color: #f26da9;
  --theme-text-color: #2d2d2d;
}

body {
  color: #000011; background-color: #ffffff;
}

h1 {
  margin: 0 0 -.5rem;
}

h2 {
  color: var(--theme-text-color); background-color: var(--theme-color);
  padding: .3em .5em;
  border-bottom: solid 1px;
  margin: 2rem 0;
}

#lead h2 {
  background-color: inherit;
  border: solid 2px var(--theme-color); border-radius: .5em;
}

h3 {
  color: var(--theme-text-color); background-color: inherit;
  font-size: 1.5rem;
  padding-left: .5rem;
  border-left: solid 1em var(--theme-color); border-bottom: solid .1em var(--theme-color);
  margin-bottom: 1em;
}

h4 {
  margin-top: 1rem;
  font-size: 1rem;
}

article section {
  text-align: justify;
}

em, strong {
  color: #c33;
  font-style: normal;
}

footer {
  text-align: center;
  padding-top: 1rem;
  border-top: 1px solid #ccc;
  margin-top: 1.5rem;
}

footer .copy {
  font-size: .9rem;
  color: #666;
}

.navbar-light {
  color: var(--theme-text-color);
  background-color: var(--theme-color) !important;
  border-bottom: solid 1px #e7e7e7;
}

.navbar-light .navbar-brand a {
  color: var(--theme-text-color); background: transparent;
  text-decoration: none;
}

.navbar-light .navbar-brand img {
  height: 1.6rem;
  margin-right: .3rem;
}

.navbar-light .navbar-nav a.nav-link {
  color: var(--theme-text-color);
}

.navbar-light .navbar-nav a:hover,
.navbar-light .navbar-nav a:focus,
.navbar-light .navbar-brand a:nth-of-type(2):hover,
.navbar-light .navbar-brand a:nth-of-type(2):focus  {
  color: var(--theme-color) !important; background-color: var(--theme-text-color);
  text-decoration: none;
}

#index #introduction {
  margin-top: 1.5rem;
  margin-bottom: 1rem;
}

#index #introduction strong {
  color: inherit;
}

#video h3 {
  margin-top: 1.5rem;
}

#support .btn.btn-block {
  max-width: 20em;
}

#errata dl.errata dt {
  display: list-item;
  font-weight: normal;
  margin-left: 1em;
}

#errata dl.errata dd {
  margin-left: 1em;
}

#errata dl.errata dd + dt {
  margin-top: .5em;
}

#errata dl.errata .wrong {
  color: #c00;
}

#errata dl.errata .correct {
  color: #00c;
}

@media screen and (max-width: 480px) {
  .container h1 img {
    display: none;
  }
}

@media screen and (max-width: 768px) {
    html {
      font-size: 62.5%;
    }
    body {
      font-size: 1.4rem;
    }
    h2 {
      font-size: 1.5em;
    }
    h3, h4 {
      font-size: 1em;
    }
    .navbar-brand {
      font-size: 1em;
    }
    .btn.btn-block {
      margin: auto;
      font-size: 1em;
    }
}

@media screen and (max-width: 1024px) {
  header.container {
    margin-top: 100px;
  }
}