style.css

@font-face {
  font-family: Lilita;
  src: url(fonts/LilitaOne-Regular.ttf);
}

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

@font-face {
  font-family: "Inter";
  src: url(fonts/Inter-ExtraLight.ttf) format("truetype");
  font-weight: 200;
}

/* Definitely should have tried SCSS */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  height: 100vh;
  font-family: Inter;
  background-color: #dadada;
}

/* Navbar */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 3rem;
  background-color: #fff;
  width: 100%;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 3rem;
}

nav a {
  text-decoration: none;
  color: #000;
  position: relative;
}

nav a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  background-color: #000;
  left: 0;
  bottom: -5px;
  transition: width 0.2s ease-out;
}

nav a:hover::after {
  width: 100%;
}

.logo {
  width: 40px;
  cursor: pointer;
}

/* EOF Navbar */

/* Core style */
main {
  margin: 0 auto;
  max-width: 80%;
  height: calc(
    100vh - 40px - 1rem
  ); /* (100vh - header.logoHeight - 2 * header.verticalPadding) */
  display: flex;
  align-items: center;
  justify-content: center;
}

.text-side,
.grandma-side {
  width: 50%;
}

.title-container,
.error-description {
  margin-bottom: 2rem;
}

.title-container span {
  font-style: oblique;
  font-weight: 200;
  font-size: 1.25rem;
}

.title-container h1 {
  font-family: Lilita;
  font-weight: 100;
  font-size: 3rem;
  text-transform: uppercase;
}

.error-description .not-found {
  font-size: 2rem;
  line-height: 2rem;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
}

.error-description .tip {
  font-style: oblique;
  font-weight: 200;
}

.home-button {
  padding: 0.5rem 1rem;
  position: relative;
  outline: none;
  background-color: transparent;
  border: 1px solid #000;
  border-radius: 3px;
  color: #000;
  cursor: pointer;
  transition: all 0.2s ease-out;
}

.home-button:hover {
  background-color: #000;
  color: #fff;
}

.grandma-container {
  /* Fixed value, if changed, need to change eyes position and mouth */
  width: 200px;
  position: relative;
  margin: auto;
  animation: grandma-jump 0.3s infinite;
}

@keyframes grandma-jump {
  0% {
    top: 0px;
  }

  50% {
    top: -2px;
  }

  100% {
    top: 0px;
  }
}

.grandma-container:has(.smile) {
  animation: none;
}

#grandma {
  width: 100%;
  height: auto;
  background: transparent;
}

/* Positionating grandma's eyes and mouth */
.eye {
  position: absolute;
  width: 9px;
  height: 9px;
  top: 56px;
}

.eye:nth-child(1) {
  left: 75px;
}

.eye:nth-child(2) {
  left: 100px;
}

.pupil {
  background-color: black;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  position: absolute;
  transform: translate(50%, 50%);
}

.mouth {
  position: absolute;
  background-color: #d46057;
  width: 20px;
  height: 10px;
  left: 85px;
  top: 76px;
  border-radius: 12px 12px 2px 2px;
  transform: rotate(-1deg);
  transition: all 0.2s ease-out;
}

.smile {
  transform: rotate(4deg);
  border-radius: 2px 2px 12px 12px;
}

.cat-container {
  width: 50px;
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 5;
  transition: all 0.3s ease;
}

/* Circle background for the cat */
.cat-container::after {
  content: "";
  position: absolute;
  background-color: #fce79c;
  width: 70px;
  height: 70px;
  left: -10px;
  top: -15px;
  border-radius: 50%;
  z-index: -1;
}

#cat {
  width: 100%;
  height: auto;
}

.cat-container:hover {
  cursor: pointer;
  bottom: 5px;
  left: 5px;
}

/* Responsive */
.hamburger {
  display: none;
}

@media screen and (max-width: 990px) {
  .text-side {
    width: 90%;
  }
}

@media screen and (max-width: 770px) {
  .text-side,
  .grandma-side {
    width: 100%;
    height: 50%;
  }

  main {
    flex-wrap: wrap-reverse;
  }

  .text-side {
    text-align: center;
  }

  .grandma-side {
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

@media screen and (max-width: 550px) {
  /* Just hided the links, hamburger not clickable at all */
  header nav a {
    display: none;
  }

  .hamburger {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    cursor: pointer;
  }

  .hamburger span {
    display: block;
    position: relative;
    width: 40px;
    height: 4px;
    background-color: #000;
  }

  .hamburger span::after {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: #000;
    top: -10px;
  }

  .hamburger span::before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: #000;
    bottom: -10px;
  }
}