/* document configuration */
* {
  margin: 0;
}

html {
  font-family: "Lexend", sans-serif;
}

body {
  background-color: #f0f0f0;
}

/* header configuration */
header {
  background-color: #3f72af;
  color: #fff;
  padding: 20px;
  display: flex;
  justify-content: space-between;
}

/* theme toggle button */
#darkModeToggle {
    background-color: transparent;
    border: none;
}

#darkModeToggle:hover {
  cursor: pointer;
}

/* main content */
main {
  font-size: 1rem;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

h1 {
  text-align: center;
}

.conteudo {
  background-color: #f9f7f7;
  width: 50%;
  padding: 20px;
  box-shadow: 0px 0px 30px 1px rgb(0 0 0 / 0.05);
}

/* footer configuration */
footer {
  background-color: #3f72af;
  color: #fff;
  padding: 20px;
  text-align: center;
}

/* images configuration */
img {
  width: 300px;
  border-radius: 10px;
}

/* page divider */
hr {
  margin: 40px auto;
  width: 30%;
  border: none;
  height: 1px;
  background: #000;
  opacity: 0.4;
}

/* dark mode */
body.dark-mode {
  background-color: #1e1e1e;
}

body.dark-mode .conteudo {
  background-color: #1f1f1f;
  color: #f0f0f0;
}

body.dark-mode hr {
  margin: 40px auto;
  width: 30%;
  border: none;
  height: 1px;
  background: #fff;
  opacity: 0.4;
}

body,
.conteudo {
  transition: background-color 0.4s ease, color 0.4s ease;
}

/* responsivity */
@media (max-width: 540px) {
  html {
    width: 100%;
  }
  body {
    width: 100%;
  }

  main {
    padding: 0 10px;
  }

  .conteudo {
    width: 100%;
    padding: 10px;
  }

  footer {
    padding: 10px;
  }
}