* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  font-size: 62.5%;
  --color-base-white: hsl(0, 0%, 100%);
  --color-base-black: hsl(240, 5%, 7%);
  --color-base-blue-900: hsl(195, 91%, 25%);
  --color-base-blue-300: hsl(195, 46%, 40%);
}

html,
body,
input {
  font-family: "Mulish", sans-serif;
}

#app {
  display: grid;
  grid-template-rows: max-content 1fr max-content;
  height: 100vh;
}

body {
  font-size: 1.6rem;
  background-color: var(--color-base-blue-900);
  color: var(--color-base-black);
}

main {
  background-color: var(--color-base-white);
}

header {
  background-color: var(--color-base-blue-900);
  display: flex;
  align-items: center;
  gap: 2.6rem;
  padding: 1.2rem 2.8rem;
  font-weight: 700;
}

header form {
  flex: 1;
}

.input-wrapper label {
  width: 1px;
  height: 1px;
  overflow: hidden;
  position: absolute;
}

.input-wrapper input {
  width: 100%;
  padding: 1.6rem;

  background-color: var(--color-base-blue-300);
  color: var(--color-base-white);
  border: none;
  border-radius: 0.6rem;

  font: 1.6rem;
  font-weight: 600;
}

.input-wrapper input::placeholder {
  opacity: 0.56rem;
  color: var(--color-base-white);
}

.avatar {
  width: 4.2rem;
  height: 4.2rem;
  object-fit: cover;

  border-radius: 50%;
  border: 1px solid var(--color-base-grey-900);
}

.title {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.title h1 {
  font-size: 2.4rem;
  line-height: 160%;
}

.articleBase img {
  width: 100%;
}

.article {
  padding: 3.1rem 2.3rem 3.4rem;
}

.article p {
  margin-top: 3.1rem;
}

.divBtn {
  display: flex;
  gap: 1.2rem;
}

.btn {
  background-color: var(--color-base-blue-900);
  padding: 1.2rem;
  border: none;
  border-radius: 50%;
  overflow: hidden;
  color: var(--color-base-white);
  transition: 1s all ease-in-out;
  cursor: pointer;
}

.btn:hover {
  background-color: hsl(195, 52%, 44%);
}

.btn:active {
  transform: translateY(2px); /* Afunda o botão 2 pixels quando clicado */
}

.related {
  padding: 0 2.3rem 3.4rem;
}

.container {
  margin-top: 3.2rem;

  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 3.2rem;
}

.cats {
  display: flex;
  gap: 1.6rem;
}

.cats h2 {
  font-size: 1.8rem;
}

.cats p {
  font-size: 1.4rem;
}

.cats img {
  max-width: 100%;
  aspect-ratio: 16/9; /* Mantém a proporção 16:9 */
  object-fit: cover;
  transition: 1s all ease-in-out;
}

.cats img:hover {
  filter: hue-rotate(7deg) contrast(101%) saturate(200%);
}

footer {
  text-align: center;
  padding-bottom: 2.5rem;
  font-weight: 600;
  color: var(--color-base-white);
}

header {
  --startY: -100%;
  animation: move 1s;
}
footer {
  --startY: 100%;
  animation: move 1s;
}
@keyframes move {
  from {
    transform: translateY(var(--startY));
  }
}

.cats {
  --delay: 0.4s;
  animation: appear 0.4s var(--delay) backwards;
}
@keyframes appear {
  0% {
    opacity: 0%;
    transform: scale(0.7);
  }

  50% {
    transform: scale(1.2);
  }
}

@media (min-width: 770px) {
  main {
    display: flex;
    padding: 4.4rem 10.9rem;
    width: 100vw;
  }

  .articleBase {
    width: 60%;
  }

  .articleBase img {
    width: 100%;
  }

  .related {
    width: 40%;
  }
}