/* =================================================================
   Mix Timetable (manageTimetable.ejs) - Styles
   ================================================================= */

/* =================================================================
   Page Layout
   ================================================================= */

.manage-timetable-container {
  padding: var(--spacing-8) 0;
}

.page-header {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.page-header h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
}

.page-header .lead {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* =================================================================
   Instructions Card
   ================================================================= */

.instructions-card {
  margin-bottom: var(--spacing-6);
  border: 2px solid var(--color-primary);
}

.instructions-card .card-header {
  background: var(--color-primary);
  color: var(--color-white);
  font-weight: var(--font-weight-semibold);
  padding: var(--spacing-4) var(--spacing-5);
}

.instructions-card .card-header i {
  margin-right: var(--spacing-2);
}

.instructions-card .card-body {
  padding: var(--spacing-5);
}

.instructions-card ul {
  margin-bottom: 0;
  padding-left: var(--spacing-5);
}

.instructions-card li {
  margin-bottom: var(--spacing-2);
  color: var(--color-text-primary);
  line-height: var(--line-height-relaxed);
}

.instructions-card li:last-child {
  margin-bottom: 0;
}

.instructions-card strong {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

/* =================================================================
   Filter Form
   ================================================================= */

.filter-form {
  margin-bottom: var(--spacing-8);
}

.filter-form .form-label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
}

.filter-form .form-select {
  height: auto;
  min-height: 45px;
  padding: var(--spacing-3);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: var(--transition-base);
}

.filter-form .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem rgba(37, 117, 252, 0.25);
  outline: none;
}

/* =================================================================
   Mixing Form Card
   ================================================================= */

.mixing-card {
  margin-bottom: var(--spacing-8);
  border: 2px solid var(--color-success);
}

.mixing-card .card-header {
  background: var(--color-success);
  color: var(--color-white);
  font-weight: var(--font-weight-bold);
  padding: var(--spacing-4) var(--spacing-5);
}

.mixing-card .card-header i {
  margin-right: var(--spacing-2);
}

.mixing-card .card-body {
  padding: var(--spacing-6);
}

.mixing-card .form-label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-2);
  display: block;
}

.mixing-card .form-select {
  height: auto;
  min-height: 45px;
  padding: var(--spacing-3);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: var(--transition-base);
}

.mixing-card .form-select:focus {
  border-color: var(--color-success);
  box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
  outline: none;
}

.mixing-card .form-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-2);
  display: block;
}

/* =================================================================
   Selected Programs List (Badges)
   ================================================================= */

.selected-programs-list {
  margin-top: var(--spacing-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  min-height: 40px;
  padding: var(--spacing-3);
  border: 1px dashed var(--color-border-medium);
  border-radius: var(--radius-md);
  background: var(--color-gray-100);
}

.selected-programs-list:empty::after {
  content: 'No programs selected yet...';
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-style: italic;
}

.program-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-3);
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: var(--transition-base);
  line-height: 1.4;
  max-width: 100%;
  word-break: break-word;
}

.program-badge:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.program-badge:active {
  transform: translateY(0);
}

/* =================================================================
   Submit Button
   ================================================================= */

.btn-mix-programs {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-md);
  border: none;
  background: var(--color-success);
  color: var(--color-white);
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
  margin-top: var(--spacing-4);
}

.btn-mix-programs:hover:not(:disabled) {
  background: var(--color-success-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-mix-programs:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-mix-programs:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-mix-programs i {
  margin-right: var(--spacing-2);
}

/* =================================================================
   Alert Messages
   ================================================================= */

.alert {
  margin-bottom: var(--spacing-5);
  border-radius: var(--radius-md);
  padding: var(--spacing-4) var(--spacing-5);
  border: 1px solid transparent;
  box-shadow: var(--shadow-sm);
}

.alert i {
  margin-right: var(--spacing-2);
}

.alert-danger {
  background-color: rgba(220, 53, 69, 0.1);
  border-color: var(--color-danger-light);
  color: var(--color-danger-dark);
}

.alert-success {
  background-color: rgba(40, 167, 69, 0.1);
  border-color: var(--color-success-light);
  color: var(--color-success-dark);
}

/* =================================================================
   Select2 Overrides
   ================================================================= */

.select2-container--bootstrap-5 .select2-selection--single {
  height: auto !important;
  min-height: 45px;
  padding: var(--spacing-3);
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-md);
}

.select2-container--bootstrap-5 .select2-selection--single .select2-selection__rendered {
  line-height: normal;
  padding: 0;
}

.select2-container--bootstrap-5 .select2-selection--single .select2-selection__arrow {
  height: 100%;
}

.select2-container--bootstrap-5.select2-container--focus .select2-selection,
.select2-container--bootstrap-5.select2-container--open .select2-selection {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem rgba(37, 117, 252, 0.25);
}

/* =================================================================
   Responsive Adjustments
   ================================================================= */

@media (max-width: 768px) {
  .manage-timetable-container {
    padding: var(--spacing-4) 0;
  }

  .page-header h1 {
    font-size: var(--font-size-2xl);
  }

  .mixing-card .card-body {
    padding: var(--spacing-4);
  }

  .instructions-card .card-body {
    padding: var(--spacing-4);
  }

  .selected-programs-list {
    flex-direction: column;
  }

  .program-badge {
    width: 100%;
    justify-content: space-between;
  }

  .btn-mix-programs {
    font-size: var(--font-size-base);
  }
}

@media (max-width: 480px) {
  .page-header h1 {
    font-size: var(--font-size-xl);
  }

  .page-header .lead {
    font-size: var(--font-size-base);
  }

  .mixing-card .card-body,
  .instructions-card .card-body {
    padding: var(--spacing-3);
  }

  .form-label {
    font-size: var(--font-size-sm);
  }
}

/* =================================================================
   Animations
   ================================================================= */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.mixing-card,
.instructions-card {
  animation: fadeIn 0.5s ease-out;
}

@keyframes badgeAppear {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.program-badge {
  animation: badgeAppear 0.3s ease-out;
}

/* =================================================================
   Accessibility
   ================================================================= */

/* Focus visible for keyboard navigation */
.form-select:focus-visible,
.btn-mix-programs:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High contrast support */
@media (prefers-contrast: high) {
  .program-badge {
    border: 2px solid var(--color-white);
  }

  .selected-programs-list {
    border-width: 2px;
    border-style: solid;
  }
}

/* Print Styles */
@media print {
  .filter-form,
  .btn-mix-programs {
    display: none !important;
  }

  .mixing-card,
  .instructions-card {
    box-shadow: none;
    border: 1px solid var(--color-border-medium);
  }

  .selected-programs-list {
    background: transparent;
  }
}