/* AI change: base-dashboard-layout */
/* AI Comment: Provides minimal structure/styling so the dashboard is readable and functional across desktop/tablet/mobile. */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f7fa;
  color: #1f2937;
}
.dashboard-header {
  background: #0f4c81;
  color: #fff;
  padding: 1rem;
}
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  max-width: 1200px;
  margin: 0 auto;
}
.header-controls {
  display: flex;
  gap: 0.5rem;
}
.header-btn,
.action-btn,
.save-btn,
.refresh-btn {
  border: 0;
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  background: #1d4ed8;
  color: #fff;
}
.dashboard-grid {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}
.stats-overview {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}
.stat-card,
.dashboard-widget {
  background: #fff;
  border: 1px solid #dbe3ef;
  border-radius: 8px;
  padding: 0.9rem;
}
.stat-number {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
}
.widget-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}
.widget-controls {
  display: flex;
  gap: 0.5rem;
}
/* AI change: credit-filter-style-match */
/* AI Comment: Keeps the added credits filter visually consistent with existing search/department inputs in the dashboard widget. */
#courseSearch,
#departmentFilter,
#creditsFilter,
/* AI CHANGE: availability-filter-style-match */
/* AI COMMENT: Keeps the new availability filter visually consistent with the existing search/department/credits inputs. */
#availabilityFilter,
/* AI change: panel-input-style-match */
/* AI Comment: Applies the existing input styling to new Add Course and Settings panel fields so UI stays consistent and beginner-friendly. */
#newCourseCode,
#newCourseTitle,
#newCourseDepartment,
#newCourseCredits,
#newCourseDescription,
#newInstructorName,
#newInstructorEmail,
#newInstructorOffice,
#newCourseDays,
#newCourseTime,
#newCourseLocation,
#newCourseCapacity,
#newCourseEnrolled,
#settingsRefreshMinutes,
#openWeatherKey,
#rapidApiKey {
  padding: 0.5rem;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
}
.courses-grid {
  display: grid;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.course-card {
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 0.6rem;
  background: #f8fafc;
}
.course-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.4rem;
}
.course-actions button {
  border: 0;
  border-radius: 4px;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
}
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  padding: 1rem;
}
/* AI change: integrated-panel-visibility */
/* AI Comment: Adds a simple class-based toggle so Add Course and Settings panels can open/close without page reload. */
.modal.is-open {
  display: block;
}
.modal-content {
  max-width: 480px;
  margin: 5vh auto;
  background: #fff;
  border-radius: 8px;
  padding: 1rem;
  max-height: 90vh;
  overflow-y: auto;
}
.api-key-setup,
.modal-actions,
.actions-grid,
.details {
  display: grid;
  gap: 0.5rem;
}
.actions-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.error-message,
.initialization-error {
  color: #b91c1c;
}
/* AI change: panel-error-style */
/* AI Comment: Provides simple visible styling for Add Course and Settings validation messages. */
.panel-error {
  min-height: 1.1rem;
  color: #b91c1c;
  font-size: 0.9rem;
}
footer {
  text-align: center;
  padding: 1rem;
  color: #475569;
}

/* AI change: responsive-breakpoints */
/* AI Comment: Adds minimal breakpoints to keep widgets/cards usable on tablet and mobile widths. */
@media (max-width: 900px) {
  .stats-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (max-width: 640px) {
  .header-content,
  .widget-header,
  .widget-controls {
    flex-direction: column;
    align-items: stretch;
  }
  .stats-overview,
  .actions-grid {
    grid-template-columns: 1fr;
  }
}