/* Theme */
:root {
  --theme-primary: #3498db;
  --theme-secondary: #d84547;
  --theme-dark: #2e4b5d;
  --theme-dark-alt: #416073;

  --color-success: #2ecc71;
  --color-warning: #e67e22;
  --color-error: #e74c3c;
  --color-info: #3498db;
}

/* Reset */
html {
  box-sizing: border-box;
}
*,
*::before,
*::after {
  box-sizing: inherit;
}

html,
body {
  margin: 0;
  background-color: #fefefe;
  color: #555;
  font-family: 'Roboto', sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}


/* Typography Styles */
h1,
h2,
h3,
h4 {
  font-weight: 500;
  margin: 1em 0;
}

h1 {
  font-size: 2em;
  margin: 0 0 1.25em;
}
h2 {
  font-size: 1.75em;
}
h3 {
  font-size: 1.5em;
}
h4 {
  font-size: 1.25em;
}

strong {
  font-weight: 500;
}

a {
  color: #4299e1;
  font-weight: 500;
}
a:hover {
  color: #2b6cb0;
  text-decoration: none;
}
a:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-info);
}

p,
li {
  font-size: 1.1em;
  line-height: 1.4;
}

p {
  margin: 0 0 1em;
}

ul {
  padding: 0 0 0 2em;
  margin: 0 0 1.5em;
}

li {
  margin: 0 0 .5em;
}

svg.icon {
  display: block;
  width: 1em;
  height: 1em;
  min-width: 1em;
  fill: currentcolor;
}

.hidden {
  display: none;
}


/* Buttons */
button,
.button {
  display: inline-flex;
  align-items: center;
  background-color: #3498db;
  color: #fff;
  padding: .75em 1em;
  width: auto;
  margin: .5em 1em .5em 0;
  border: 0;
  border-radius: .5em;
  font-size: 1.2em;
  font-weight: 400;
  cursor: pointer;
  text-decoration: none;
  transition: filter .25s ease;
}
button:hover,
.button:hover {
  color: #fff;
  filter: brightness(90%);
}
button:focus,
.button:focus {
  outline: none;
  box-shadow: 
    0 0 0 2px white,
    0 0 0 4px var(--color-info);
}

button svg,
.button svg {
  margin-right: .5em;
}


/* Header */
header {
  width: 100%;
  background-color: var(--theme-dark);
  border-top: 3px solid var(--theme-secondary);
}

header nav {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  width: 100%;
  max-width: 75em;
  margin: 0 auto;
}

header .logo {
  width: 12em;
  min-width: 12em;
  padding: 1em;
  transition: opacity .2s ease;
}
header .logo svg {
  display: block;
  width: 100%;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  padding: 0;
  margin: 0 0 0 auto;
  list-style: none;
}

header nav li {
  margin: 0;
}
header nav li svg {
  font-size: 1.25em;
  margin-right: .25em;
  margin-top: -0.1em;
  opacity: .5;
}

header li a {
  display: inline-flex;
  align-items: center;
  width: 100%;
  height: 100%;
  color: rgba(255,255,255,.8);
  padding: 1em;
  text-align: center;
  text-decoration: none;
  font-size: 1rem;
  font-weight: 400;
  white-space: nowrap;
  transition:
    background-color .25s ease,
    color .25s ease;
}
header li a:hover {
  background-color: var(--theme-secondary);
  color: #fff;
}
header li a:focus {
  outline: none;
  box-shadow: inset 0 0 0 3px var(--color-info);
}

@media (min-width: 40em) {
  header li a {
    padding: 1em 1.5em;
  }
}


/* Page Container */
.intro {
  background-color: #eee;
  padding: 2em 0 1em;
}

@media (min-width: 40em) {
  .intro {
    padding: 3em 0 1em;
  }
}

@media (min-width: 60em) {
  .intro {
    padding: 5em 0 3em;
  }
}

main {
  width: 100%;
  flex: 1;
  margin: 2em auto 3em;
}

@media (min-width: 40em) {
  main {
    margin: 4em auto 5em;
  }
}

.row {
  width: 100%;
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5em;
  padding-right: 1.5em;
}


/* Footer */
footer {
  padding: 1.5em;
  text-align: center;
  background-color: var(--theme-secondary);
  color: #fff;
}