* {
  box-sizing: border-box;
}

:root {
  --page-bg: #ffffff;
  --page-bg-image: url("https://s3.amazonaws.com/codecademy-content/courses/web-101/unit-6/htmlcss1-img_foodlogo.png");
  --text-color: #333333;
  --nav-text: #666666;
  --accent: #05A8AA;
  --accent-contrast: #ffffff;
  --button-border: blue;
  --button-text: #05A8AA;
  --button-hover: #05A8AA;
  --button-hover-border: #05A8AA;
  --header-bg: url("https://s3.amazonaws.com/codecademy-content/courses/web-101/unit-6/htmlcss1-img_burgerphoto.jpeg");
}

body.blue {
  --accent: #05A8AA;
  --button-text: #05A8AA;
  --button-border: blue;
  --button-hover: #05A8AA;
  --button-hover-border: #05A8AA;
}

body.pink {
  --accent: #d94f8f;
  --button-text: #d94f8f;
  --button-border: #d94f8f;
  --button-hover: #d94f8f;
  --button-hover-border: #d94f8f;
}

body.green {
  --accent: #2f9d57;
  --button-text: #2f9d57;
  --button-border: #2f9d57;
  --button-hover: #2f9d57;
  --button-hover-border: #2f9d57;
}

body.dark {
  --page-bg: #111111;
  --page-bg-image: none;
  --text-color: #f4f4f4;
  --nav-text: #f4f4f4;
  --accent: #0c6f73;
  --accent-contrast: #ffffff;
  --button-border: #7ec8ff;
  --button-text: #ffffff;
  --button-hover: #0c6f73;
  --button-hover-border: #0c6f73;
}

body {
  background-color: var(--page-bg);
  background-image: var(--page-bg-image);
  text-align: center;
  color: var(--text-color);
  font-family: 'Roboto', sans-serif;
  font-size: 18px;
}

a {
  text-decoration: none;
}

.theme-switcher {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 10;
}

.theme-select {
  padding: 10px 14px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background-color: #ffffff;
  color: var(--accent);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.theme-select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

body.dark .theme-select {
  background-color: #f4f4f4;
  color: #111111;
  border: 1px solid var(--accent);
}

nav {
  text-align: center;
}

nav img {
  width: 180px;
  margin: 0 auto;
  display: block;
}

nav span {
  margin: 10px 0;
  display: block;
  font-size: 16px;
  font-weight: 100;
  letter-spacing: 2px;
}

nav a {
  color: var(--nav-text);
}

.content {
  width: 100%;
  height: 500px;
  margin: 10px auto;
  overflow: scroll;
}

.header {
  background-image: var(--header-bg);
  background-position: center;
  background-size: cover;
  height: 320px;
}

.header h1 {
  background-color: var(--accent);
  color: var(--accent-contrast);
  font-family: 'Oswald', sans-serif;
  font-size: 40px;
  font-weight: 300;
  line-height: 40px;
  width: 68%;
  padding: 20px;
  margin: 0 auto;
}

.content .body {
  width: 90%;
  margin: 0 auto;
}

.body p {
  color: var(--text-color);
  font-weight: 100;
  line-height: 34px;
  width: 90%;
  margin-top: 18px;
  margin-left: auto;
  margin-right: auto;
}

.button {
  border-radius: 4px;
  color: var(--button-text);
  display: block;
  font-weight: 700;
  width: 200px;
  padding: 20px;
  margin: 40px auto;
  border: 1px solid var(--button-border);
}

.button:hover {
  background-color: var(--button-hover);
  border: 1px solid var(--button-hover-border);
  color: #FFF;
}

ul.nutrition {
  padding: 20px;
}

ul.nutrition li {
  display: inline-block;
  background-color: var(--accent);
  list-style: none;
  width: 200px;
  padding: 10px 20px;
  margin-bottom: 3px;
  color: white;
}

.nutrition .category {
  color: var(--accent-contrast);
  font-weight: 100;
  letter-spacing: 2px;
  display: block;
}

.nutrition .value {
  color: var(--accent-contrast);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 2px;
}

@media only screen and (max-width: 768px) {
  .theme-switcher {
    top: 10px;
    right: 10px;
  }

  .theme-select {
    padding: 9px 12px;
    font-size: 14px;
  }

  body {
    font-size: 16px;
    background-size: cover;
    background-position: center top;
  }

  nav img {
    width: 140px;
  }

  nav span {
    margin: 8px 0;
    font-size: 14px;
    letter-spacing: 1px;
  }

  .content {
    height: auto;
    margin: 8px auto;
    overflow: visible;
    width: 100%;
  }

  .header {
    height: 240px;
  }

  .header h1 {
    width: 90%;
    font-size: 30px;
    line-height: 34px;
    padding: 16px;
  }

  .content .body {
    width: 100%;
  }

  .body p {
    width: 92%;
    line-height: 28px;
    margin-top: 14px;
  }

  .button {
    width: 80%;
    max-width: 260px;
    padding: 16px 20px;
    margin: 28px auto;
  }

  ul.nutrition {
    padding: 12px;
  }

  ul.nutrition li {
    width: 100%;
    max-width: 320px;
    padding: 10px 16px;
    margin: 0 auto 8px;
    display: block;
  }

  .nutrition .value {
    font-size: 22px;
  }
}