advanced-css-and-scss/natour/scss/app.scss

/* Resets */

// @import url('https://fonts.googleapis.com/css?family=Lato:300,400,700,900&display=swap');
// font-family: 'Lato', sans-serif;
$global-background: rgb(250, 250, 250);

@font-face {
  font-family: "Lato";
  font-style: normal;
  font-display: swap;
  font-weight: 300;
  src: local("Lato Light"), local("Lato-Light"),
    url("../fonts/Lato-Light.ttf") format("truetype");
}

@font-face {
  font-family: "Lato";
  font-style: normal;
  font-display: swap;
  font-weight: 400;
  src: local("Lato Regular"), local("Lato-Regular"),
    url("../fonts/Lato-Regular.ttf") format("truetype");
}

@font-face {
  font-family: "Lato";
  font-style: normal;
  font-display: swap;
  font-weight: 700;
  src: local("Lato Bold"), local("Lato-Bold"),
    url("../fonts/Lato-Bold.ttf") format("truetype");
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}

html {
  // Set's the rem to 10px in most browsers (16px)
  font-size: 62.5%;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1.6rem;
  color: #777;
  padding: 3rem;
  line-height: 1.7;
  box-sizing: border-box;
}

.content-wrapper {
  background: $global-background;
}

.header {
  position: relative;
  height: 95vh;
  background-image: linear-gradient(
      rgba(56, 218, 116, 0.7),
      rgba(38, 189, 93, 0.7)
    ),
    url("../img/train.jpg");
  background-position: center;
  clip-path: polygon(0 0, 100% 0, 100% 85vh, 0 100%);
}

.header-logo {
  position: absolute;
  top: 4rem;
  left: 4rem;
}

.logo {
  height: 3.5rem;
}

.hero-text-box {
  position: absolute;
  top: 40%;
  left: 50%;
  // Here we are translating this element so that it's dirct center
  // is in the absolution position described above. No margin auto!
  transform: translate(-50%, -50%);
  text-align: center;
}

.hero-primary {
  text-transform: uppercase;
  color: #ffffff;
  //used to prevent gitter in the animation
  backface-visibility: hidden;
  margin-bottom: 6rem;
}

.hero-title-main {
  display: block;
  top: 25%;
  font-weight: 400;
  font-size: 6rem;
  letter-spacing: 3.5rem;
  animation: moveInLeft 0.8s ease-out;
}

.hero-title-sub {
  display: block;
  position: relative;
  top: 25%;
  font-weight: 700;
  font-size: 2rem;
  letter-spacing: 1.75rem;
  animation: moveInRight 0.8s ease-out;
}

.dark-hero-title {
  color: #777;
}

.pitch {
  height: 150vh;
}

.banana-slug-back {
  position: absolute;
  top: -200px;
  left: 4rem;
  height: 40rem;
  width: 40rem;
  background-image: linear-gradient($global-background, $global-background);
  border-radius: 100%;
}

.banana-slug {
  // position: absolute;
  // top: -200px;
  // left: 40px;
  height: 40rem;
  width: 40rem;
  border-radius: 100%;
  border: 0.3rem solid $global-background;
  animation: moveInBottom 1s ease-out;
  animation-fill-mode: backwards;
}

.cards {
  position: relative;
  height: 90vh;
  background-image: url("../img/bg-cube-pattern.png"),
    linear-gradient(rgba(45, 114, 243, 0.8), rgba(45, 114, 243, 0.8));
}

@keyframes moveInLeft {
  0% {
    opacity: 0;
    transform: translate(-5rem);
  }

  80% {
    transform: translate(1rem);
  }

  100% {
    opacity: 1;
    transform: translate(0);
  }
}

@keyframes moveInRight {
  0% {
    opacity: 0;
    transform: translate(5rem);
  }

  80% {
    transform: translate(-1rem);
  }

  100% {
    opacity: 1;
    transform: translate(0);
  }
}

@keyframes moveInBottom {
  0% {
    opacity: 0;
    transform: translate(0, 5rem);
  }

  100% {
    opacity: 1;
    transform: translate(0);
  }
}

// the :link and :visited which are psuedo classes

.btn:link,
.btn:visited {
  text-transform: uppercase;
  text-decoration: none;
  padding: 1.5rem 4rem;
  // Anchor tags are inline elements so we need to change the display property to have it behave line a block.
  // Since it is an inline element it is treated as if it was text. So to place it in the center of the box,
  // all we have to do is set the parent container's text-align: center; This does not change the h1 content,
  // Since it's elements are display: block;
  display: inline-block;
  border-radius: 10rem;
  //The transition properties has to be on the initial state, and the transform operations in the other psuedo
  // Selectors will follow this transition declaration.
  transition: all 0.2s;
  position: relative;
}

.btn-white {
  background-color: #ffffff;
  color: #777;
}

.btn:hover {
  transform: translateY(-3px);
  // x-offset, y-offset, blur, color
  box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.2);
}

//When we click an element it is called the "active state".
// This is how the material library does snazzy animations when you click a button.
.btn:active {
  // This translation is in relation to the initial state, not the hover state.
  transform: translateY(-1px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.2);
}

//This psudeo selector is like a virtual element after the element it is selecting.
// In this case we are adding an element that will look exactly like the element we
//have, but we are putting it behind the element. When we hover out this psuedo
//elment hides back behind the button.
.btn::after {
  //Always need a content and display property for after elements.
  content: "";
  display: inline-block;
  // This works because the ::after psudeo element is treated like a child of the
  // item it is selecting. So 100% the width of the button.
  height: 100%;
  width: 100%;
  border-radius: 10rem;
  // To place it behind the button we can use absolute positioning
  position: absolute;
  top: 0;
  left: 0;
  // Places this element behind the button.
  z-index: -1;
  //tranition here because it is the initial state for the .btn:hover::after selector
  transition: all 0.4s;
}

.btn-white::after {
  background-color: #ffffff;
}

//When we hover the button we want some certain styles for the ::after element.
.btn:hover::after {
  transform: scaleX(1.4) scaleY(1.6);
  //fading out
  opacity: 0;
}

.btn-animated {
  animation: moveInBottom 0.8s ease-out;
  // This property automatically applies the animate styles before the animation starts.
  animation-fill-mode: backwards;
}