/* Custom CSS for Data Visualization Course Website */

/* Typography */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 1rem;
}

/* Code blocks */
pre {
  background-color: #f8f9fa;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  padding: 1rem;
  overflow-x: auto;
}

code {
  color: #e83e8c;
  background-color: #f8f9fa;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
}

/* Tables */
table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.5rem 0;
}

table th {
  background-color: #007bff;
  color: white;
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
}

table td {
  padding: 0.75rem;
  border-bottom: 1px solid #dee2e6;
}

table tr:hover {
  background-color: #f8f9fa;
}

/* Callout boxes */
.callout {
  padding: 1rem;
  margin: 1.5rem 0;
  border-left: 4px solid #007bff;
  background-color: #f8f9fa;
  border-radius: 4px;
}

.callout-note {
  border-left-color: #17a2b8;
}

.callout-tip {
  border-left-color: #28a745;
}

.callout-warning {
  border-left-color: #ffc107;
}

.callout-important {
  border-left-color: #dc3545;
}

/* Navigation */
.navbar {
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.25rem;
}

/* Footer */
.page-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #dee2e6;
  font-size: 0.9rem;
  color: #6c757d;
}

/* Details/Summary for collapsible solutions */
details {
  margin: 1.5rem 0;
  padding: 1rem;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  background-color: #f8f9fa;
}

summary {
  font-weight: 600;
  cursor: pointer;
  padding: 0.5rem;
  margin: -1rem -1rem 0 -1rem;
  background-color: #e9ecef;
  border-radius: 4px 4px 0 0;
  user-select: none;
}

summary:hover {
  background-color: #dee2e6;
}

details[open] summary {
  margin-bottom: 1rem;
}

/* Buttons and links */
a {
  color: #007bff;
  text-decoration: none;
}

a:hover {
  color: #0056b3;
  text-decoration: underline;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-primary {
  background-color: #007bff;
  color: white;
}

.btn-primary:hover {
  background-color: #0056b3;
  text-decoration: none;
}

/* Emoji and icons */
.icon {
  display: inline-block;
  width: 1.2em;
  height: 1.2em;
  vertical-align: middle;
}

/* Schedule tables specific styling */
.schedule-table th:first-child {
  width: 80px;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem auto;
}

/* Checklist styling */
ul.task-list {
  list-style: none;
  padding-left: 0;
}

ul.task-list li {
  padding-left: 1.5rem;
  position: relative;
}

ul.task-list li::before {
  content: "☐";
  position: absolute;
  left: 0;
  font-size: 1.2em;
}

ul.task-list li.checked::before {
  content: "☑";
  color: #28a745;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  body {
    font-size: 0.95rem;
  }
  
  h1 {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  table {
    font-size: 0.9rem;
  }
}

/* Print styles */
@media print {
  .navbar,
  .page-footer {
    display: none;
  }
  
  pre {
    border: 1px solid #000;
    page-break-inside: avoid;
  }
}