/* Header styling */
header {
  background-color: var(--white);
  border-bottom: 1px solid var(--off-white);
  padding: 40px 0;
  text-align: center;
  box-shadow: 0 1px 10px var(--transparent-black);
}

h1 {
  font-size: 2.2rem;
  font-weight: 500;
  margin: 0;
  color: var(--black);
  font-family: "Roboto Mono", monospace;
}
p {
  color: var(--black);
  font-family: "Roboto Mono", monospace;
}
/* Archive Button Styling */
.archive-button-container {
  text-align: center; /* Center the button */
  margin: 30px 0; /* Add space above and below */
  font-family: "Roboto Mono", monospace;
  font-weight: 900;
}

.archive-button {
  padding: 10px 20px;
  color: var(--accent-color); /* Primary color for text */
  background-color: transparent; /* No background color */
  border: 2px solid var(--accent-color); /* Border in primary color */
  text-decoration: none;
  font-weight: bold;
  border-radius: 4px; /* Slightly rounded corners */
  transition: background-color 0.3s ease, color 0.3s ease, transform 0.2s ease; /* Transition effects */
}

.archive-button:hover {
  background-color: var(
    --accent-color
  ); /* Change background to primary color on hover */
  color: var(--white); /* Change text to white on hover */
}

/* Exercise Section */
.exercise-section {
  width: 80%;
  max-width: 800px;
  margin: 8px auto;
  padding: 0 20px;
}

h2 {
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--black);
  margin-bottom: 30px;
  text-align: center;
  letter-spacing: 1px;
  font-family: "Roboto Mono", monospace;
}

/* Topic-item styling */
.topic-item {
  background-color: var(--off-white);
  border-radius: 8px;
  box-shadow: 0 1px 2px var(--transparent-black);
  margin-bottom: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.collapsible {
  background-color: var(--off-white);
  cursor: pointer;
  padding: 20px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Caret Styling */
.caret {
  fill: var(--default-link-color);
  transition: transform 0.3s ease, fill 0.3s ease;
  width: 20px;
  height: 20px;
}

/* Change caret direction when content is shown */
.collapsible.active .caret {
  transform: rotate(90deg);
}

/* Content styling */
.content {
  padding: 0 20px;
  display: block; /* Show all content sections initially */
}

/* Exercise-solution pair styling */
.exercise-solution {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--darker-off-white);
}

.exercise-solution:last-child {
  border-bottom: none;
}

/* Simplified link styling */
.solution-link,
.exercise-link {
  color: var(--black); /* Primary color */
  text-decoration: none;
  font-weight: bolder;
  transition: color 0.3s ease;
  font-family: "Roboto Mono", monospace;
}

.solution-link:hover,
.exercise-link:hover {
  color: var(--accent-color); /* Darker shade for hover */
}

/* Separator styling */
.separator {
  margin: 0 10px;
  font-weight: bold;
}