:root {
  color-scheme: light dark;
  --black: black; /* 123123 */
  --white: white; /* whitesmoke */
  --hecblue: #03a9f4;
  --lightlink: #01579b; /* alexandria */
  --marblesbg: #ffe7ce;
  --romiosiniblue: #0d47a1;
  --romiosinibg: #ffffdc;
  --marblespurple: #637bad;
  --darkred: #800000;
  --dividerlight: #e0e0e0;
  --dividerdark: #a1a1a1;
  --purpledark: #e96bff;
  --purplelight: #75008a;
  --gray: #424242;
  --shadow: #d9d9d9;
  line-height: 1.5;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  font-weight: normal;
  font-size: 16px;
  height: 100%;
}

main {
  flex: 1 0 auto;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 95%;
  margin: 15px auto;
}

ul {
  padding-left: 0;
  list-style-type: none;
}

a {
  color: var(--hecblue);
}

/* NAV */
nav {
  font-size: inherit;
}

nav .brand-logo {
  margin-left: 15px;
}

@media only screen and (max-width: 992px) {
  nav .brand-logo {
    left: 0%;
    -webkit-transform: translateX(0%);
    transform: translateX(0%);
  }
}

nav ul li a {
  margin: 0 15px;
}

/* etc */

.btn {
  border: 1px solid var(--white);
  text-transform: none;
}

.btn:focus,
.btn:hover,
.btn:active {
  background-color: transparent;
}

nav .sidenav-trigger,
.toggle {
  margin: 0 15px 0 0;
}

.toggle {
  vertical-align: middle;
  background-color: transparent;
  cursor: pointer;
  color: var(--white);
  border-radius: 5px;
  width: 80px;
}

@media only screen and (min-width: 993px) {
  .toggle {
    margin: 0px 15px 0 0;
  }
}

img.left {
  float: left;
  margin-right: 10px;
  max-width: 50%;
}

img.right {
  float: right;
  margin-left: 10px;
  max-width: 50%;
}

.divider {
  height: 1px;
  overflow: hidden;
  background-color: var(--dividerlight);
}

blockquote {
  margin: 20px 0;
  padding-left: 1.5rem;
  border-left: 5px solid var(--hecblue);
}

body > footer {
  position: sticky;
  top: 100vh;
}

.btn-floating.btn-large,
.btn-floating:hover {
  background-color: var(--hecblue);
}

/* light vs. dark mode */

@media (prefers-color-scheme: light) {
  body {
    background-color: var(--white);
    color: var(--black);
  }

  nav {
    background-color: var(--hecblue);
    border-bottom: 0;
  }

  nav .brand-logo {
    color: var(--white);
  }

  .btn-floating.btn-large {
    border: none;
  }

  .dark body {
    color: var(--white);
    background-color: var(--black);
  }

  .dark nav {
    background-color: var(--black);
    border-bottom: 1px solid var(--dividerdark);
  }

  .dark nav .brand-logo {
    color: var(--hecblue);
  }

  .dark .btn-floating.btn-large {
    border: none; /*1px solid var(--white)*/
  }
}

@media (prefers-color-scheme: dark) {
  body {
    color: var(--white);
    background-color: var(--black);
  }

  nav {
    background-color: var(--black);
    border-bottom: 1px solid var(--dividerdark);
  }

  nav .brand-logo {
    color: var(--hecblue);
  }

  .btn-floating.btn-large {
    border: /*1px solid var(--white); */ none;
  }

  .light body {
    background-color: var(--white);
    color: var(--black);
  }

  .light nav {
    background-color: var(--hecblue);
    border-bottom: none;
  }

  .light nav .brand-logo {
    color: var(--white);
  }

  .light .btn-floating.btn-large {
    border: none;
  }
}