/* Custom styles for the Algebra Worksheet Generator */

/* Navbar brand styling */
.navbar-brand {
    color: white !important;
}

/* Override minimal Bootstrap styles only when necessary */
.text-purple {
    color: var(--bs-info) !important;
}

/* Form styling improvements */
.form-check-input:checked {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.form-check-label {
    cursor: pointer;
}

/* Card hover effects */
.card {
    transition: transform 0.2s ease-in-out;
}

.card:hover {
    transform: translateY(-2px);
}

/* Badge styling for difficulty levels */
.badge.bg-success {
    background-color: var(--bs-success) !important;
}

.badge.bg-warning {
    background-color: var(--bs-warning) !important;
    color: var(--bs-dark) !important;
}

.badge.bg-danger {
    background-color: var(--bs-danger) !important;
}

/* Global sanity */
* { box-sizing: border-box; }
:root { --pt-font: 15px; --pt-line: 1.35; }

/* Problem Types Section - CSS Grid Layout */
.problem-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px 24px;              /* row gap / column gap */
  margin: 12px 0 16px;
  padding: 0;
}

/* Each checkbox + label row */
.problem-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: var(--pt-font);
  line-height: var(--pt-line);
  color: var(--bs-body-color);
  padding: 0.5rem;
  border-radius: 0.375rem;
  transition: background-color 0.2s ease-in-out;
}

.problem-item:hover {
  background-color: var(--bs-dark);
}

/* Checkbox sizing & alignment */
.problem-item input[type="checkbox"] {
  flex: 0 0 auto;
  margin: 2px 0 0;             /* align with first line of label */
  transform: none;             /* prevent weird scaling */
}

/* Make labels wrap nicely */
.problem-item label {
  display: inline-block;
  margin: 0;
  white-space: normal;         /* allow wrapping */
  word-break: break-word;
  cursor: pointer;
}

/* Mobile: single column */
@media (max-width: 640px) {
  .problem-types { 
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .problem-item {
    padding: 0.375rem;
  }
}

/* Loading state for generate button */
#generate-btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* Print-friendly styles */
@media print {
    .navbar, .card-header, .btn, .alert {
        display: none !important;
    }
    
    .card {
        border: none !important;
        box-shadow: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn-lg {
        font-size: 1rem;
        padding: 0.75rem 1.5rem;
    }
}

/* Animation for form submission */
.form-submitting {
    opacity: 0.7;
    pointer-events: none;
}

.form-submitting .btn {
    position: relative;
}

.form-submitting .btn::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    margin: auto;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Custom scrollbar for webkit browsers */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bs-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--bs-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bs-primary);
}

/* Topic heading styling for plain text headers */
.topic-heading {
  font-weight: 600;
  color: var(--bs-body-color);
  margin: 0 0 12px 0;
  padding: 0.5rem;
  border-bottom: 1px solid var(--bs-border-color);
}

/* Subtopic list styling for Linear Equations */
.subtopic-list { margin-left: 20px; font-size: 0.95em; }
.subtopic-items { list-style: none; padding-left: 0; margin: 0; }
.subtopic-items li { margin: 6px 0; }
.subtopic { display: flex; align-items: center; gap: 8px; }