:root {
  --primary-color: #3498db;
  --secondary-color: #2ecc7082;
  --secondary-color2: #00000082;
  --highlight-color: #d0ad23;
  --accent-color: #e74d3cca;
  --text-color: #ecf0f1;
  --background-color: #1b1c1d;
  --background-color2: #181919;
}

body {
  font-family: "Roboto", sans-serif;
  background-color: var(--background-color2);
  color: var(--text-color);
}
h1,h2 {
  text-align: center;
  margin: 2rem 0;
  font-size: 1.6rem;
}

header {
  background-color: var(--primary-color);
  width: 100vw;
  font-family: cursive;
}
.header {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--primary-color);
}
.header a {
  color: var(--text-color);
  background-color: var(--accent-color);
  padding: 1rem 1.4rem;
  border-radius: 5px;
}
.main {
  display: flex;
  flex-direction: column;
  max-width: 600px;
  gap: 1rem;
  width: 100%;
  margin: 0 auto 5rem;
  
}
.disabled-link {
  pointer-events: none;
  color: #7f8c8d;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

ul {
  list-style: none;
}

a {
  text-decoration: none;
  color: var(--text-color);
}

button {
  cursor: pointer;
}

/*
@media (max-width: 768px) {
  .header {
    justify-content: space-between;
  }
}
*/
.doubt{
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  bottom: 2rem;
  right:  2rem;
  background-color: var(--primary-color);
  opacity: 0.5;
  min-width: 2rem;
  min-height: 2rem;
}
.doubt-text{
  bottom: 1rem;
  right:  1rem;
  background-color: var(--primary-color);
  padding: 2rem;
  border-radius: 5px;
  color: var(--text-color);
}

.doubt-button{
  background-color: var(--primary-color);
  padding: 1rem;
  border-radius: 5px;
}
.doubt:hover{
  opacity: 1;
}
.hidden{
  display: none;
}

#doubt-link{
  color: var(--secondary-color2);
  text-decoration:dashed;
  font-weight: 500;
}

@media screen and (max-width: 768px) {
  .main {
    padding: 1rem;
  }
  .header {
    padding: 0.5rem;
  }
  .header a {
    padding: 0.5rem 0.7rem;
  }
  .doubt{
    bottom: 1rem;
    right:  1rem;
    min-width: 1rem;
    min-height: 1rem;
    position: fixed;
  }
  .doubt-text{
    padding: 1rem;
  }
  .doubt-button{
    padding: 0.5rem;
  }
  
}