/* Material Design 3 Variables */
:root {
  --md-primary: #6750A4;
  --md-on-primary: #FFFFFF;
  --md-primary-container: #EADDFF;
  --md-on-primary-container: #21005D;
  
  --md-secondary: #625B71;
  --md-on-secondary: #FFFFFF;
  --md-secondary-container: #E8DEF8;
  --md-on-secondary-container: #1D192B;
  
  --md-tertiary: #7D5260;
  --md-on-tertiary: #FFFFFF;
  --md-tertiary-container: #FFD8E4;
  --md-on-tertiary-container: #31111D;
  
  --md-error: #BA1A1A;
  --md-on-error: #FFFFFF;
  --md-error-container: #FFDAD6;
  --md-on-error-container: #410002;
  
  --md-surface: #FFFBFE;
  --md-on-surface: #1C1B1F;
  --md-surface-variant: #E7E0EC;
  --md-on-surface-variant: #49454F;
  --md-outline: #79747E;
  --md-outline-variant: #CAC4D0;
  
  --md-shadow: rgba(0, 0, 0, 0.15);
  --md-elevation-1: 0px 1px 2px var(--md-shadow), 0px 1px 3px 1px var(--md-shadow);
  --md-elevation-2: 0px 1px 2px var(--md-shadow), 0px 2px 6px 2px var(--md-shadow);
  --md-elevation-3: 0px 1px 3px var(--md-shadow), 0px 4px 8px 3px var(--md-shadow);
  
  --border-radius: 12px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
  min-height: 100vh;
  max-width: 1200px;
  margin: 0 auto;
}

/* App Bar */
.app-bar {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--md-elevation-2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-bar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.app-bar-right {
  display: flex;
  align-items: center;
}

.app-bar h1 {
  font-size: 1.375rem;
  font-weight: 500;
  margin: 0;
}

.app-bar .material-icons {
  font-size: 24px;
}

/* User Info */
.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--md-on-primary);
}

.user-info span:not(.material-icons) {
  font-weight: 500;
}

.icon-button {
  background: none;
  border: none;
  color: var(--md-on-primary);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
}

.icon-button:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.icon-button .material-icons {
  font-size: 20px;
}

/* Main Content */
.main-content {
  padding: var(--spacing-lg);
  gap: var(--spacing-xl);
  display: flex;
  flex-direction: column;
}

/* Action Section */
.action-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.action-card {
  background-color: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: 120px;
  justify-content: center;
}

.action-card:hover {
  background-color: var(--md-primary-container);
  border-color: var(--md-primary);
  box-shadow: var(--md-elevation-2);
  transform: translateY(-2px);
}

.action-card .material-icons {
  font-size: 48px;
  color: var(--md-primary);
}

.action-card h3 {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--md-on-surface);
  margin: 0;
}

.action-card p {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  margin: 0;
}

/* Surface */
.surface {
  background-color: var(--md-surface);
  border-radius: var(--border-radius);
  box-shadow: var(--md-elevation-1);
  padding: var(--spacing-lg);
}

/* Checklist */
#checklist-container {
  animation: slideIn 0.3s ease;
}

#checklist-container h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  color: var(--md-on-surface);
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border-radius: var(--spacing-sm);
  cursor: pointer;
  transition: background-color 0.2s ease;
  position: relative;
}

.checkbox-item:hover {
  background-color: var(--md-surface-variant);
}

.checkbox-item input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  height: 20px;
  width: 20px;
  border: 2px solid var(--md-outline);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.checkbox-item input:checked ~ .checkmark {
  background-color: var(--md-primary);
  border-color: var(--md-primary);
}

.checkbox-item input:checked ~ .checkmark::after {
  content: '✓';
  color: var(--md-on-primary);
  font-size: 14px;
  font-weight: bold;
}

.checkbox-text {
  font-size: 1rem;
  color: var(--md-on-surface);
  flex: 1;
}

/* Input Group */
.input-group {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  align-items: center;
}

.text-field {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--md-outline);
  border-radius: var(--spacing-sm);
  font-size: 1rem;
  background-color: var(--md-surface);
  color: var(--md-on-surface);
  transition: border-color 0.2s ease;
}

.text-field:focus {
  outline: none;
  border-color: var(--md-primary);
  border-width: 2px;
}

.text-field::placeholder {
  color: var(--md-on-surface-variant);
}

.primary-button {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
  border: none;
  border-radius: var(--spacing-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: 48px;
}

.primary-button:hover {
  background-color: #5a4494;
  box-shadow: var(--md-elevation-2);
}

.primary-button:active {
  transform: scale(0.98);
}

/* Calendar Section */
.calendar-section h2 {
  font-size: 1.5rem;
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
  color: var(--md-on-surface);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.calendar-section .material-icons {
  color: var(--md-primary);
}

/* Calendar Store Selector */
.calendar-store-selector {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--md-surface-variant);
  border-radius: var(--spacing-sm);
  border: 1px solid var(--md-outline-variant);
}

.calendar-store-selector .store-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
  color: var(--md-on-surface);
  white-space: nowrap;
}

.calendar-store-selector .store-label .material-icons {
  color: var(--md-primary);
  font-size: 20px;
}

.calendar-store-selector .store-dropdown {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--md-outline);
  border-radius: var(--spacing-sm);
  font-size: 1rem;
  background-color: var(--md-surface);
  color: var(--md-on-surface);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.calendar-store-selector .store-dropdown:focus {
  outline: none;
  border-color: var(--md-primary);
  border-width: 2px;
}

/* Calendar Customization */
#calendar {
  max-width: 100%;
}

.fc-theme-standard .fc-scrollgrid {
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--spacing-sm);
  overflow: hidden;
}

.fc-theme-standard .fc-scrollgrid-section > * {
  border-color: var(--md-outline-variant);
}

.fc-theme-standard td, .fc-theme-standard th {
  border-color: var(--md-outline-variant);
}

.fc-col-header-cell {
  background-color: var(--md-surface-variant);
  color: var(--md-on-surface-variant);
  font-weight: 500;
  padding: var(--spacing-sm) !important;
  font-size: 0.875rem !important;
}

.fc-daygrid-day {
  min-height: 80px !important;
  height: 80px !important;
}

.fc-daygrid-day-frame {
  min-height: 80px !important;
}

.fc-daygrid-day-number {
  font-size: 0.875rem !important;
  padding: var(--spacing-xs) !important;
  color: var(--md-on-surface);
  font-weight: 500;
}

.fc-event {
  font-size: 11px !important;
  padding: 2px 4px !important;
  margin: 1px !important;
  border-radius: 4px !important;
  border: none !important;
  font-weight: 500;
}

.fc-button-primary {
  background-color: var(--md-primary) !important;
  border-color: var(--md-primary) !important;
}

.fc-button-primary:hover {
  background-color: #5a4494 !important;
  border-color: #5a4494 !important;
}

/* Tooltip */
.tooltip {
  position: absolute;
  background: var(--md-on-surface);
  color: var(--md-surface);
  padding: var(--spacing-md);
  border-radius: var(--spacing-sm);
  font-size: 0.875rem;
  pointer-events: none;
  z-index: 9999;
  max-width: 250px;
  box-shadow: var(--md-elevation-3);
  animation: fadeIn 0.2s ease;
}

.tooltip-title {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

/* Snackbar */
.snackbar {
  position: fixed;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--md-on-surface);
  color: var(--md-surface);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--md-elevation-3);
  z-index: 1000;
  transition: transform 0.3s ease;
  max-width: 90vw;
}

.snackbar.show {
  transform: translateX(-50%) translateY(0);
}

.snackbar-success {
  background-color: #4CAF50;
}

.snackbar-warning {
  background-color: #FF9800;
}

.snackbar-error {
  background-color: var(--md-error);
}

/* Animations */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .main-content {
    padding: var(--spacing-md);
    gap: var(--spacing-lg);
  }
  
  .app-bar {
    padding: var(--spacing-md);
  }
  
  .app-bar h1 {
    font-size: 1.125rem;
  }
  
  .action-section {
    grid-template-columns: 1fr;
  }
  
  .action-card {
    min-height: 100px;
    padding: var(--spacing-md);
  }
  
  .action-card .material-icons {
    font-size: 36px;
  }
  
  .action-card h3 {
    font-size: 1.125rem;
  }
  
  .input-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .primary-button {
    justify-content: center;
  }
  
  /* Store Selector Mobile */
  .store-selector {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
  
  .store-label {
    justify-content: center;
  }
  
  /* Category Mobile */
  .category-title {
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .category-tasks .checkbox-item {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .checkbox-text {
    font-size: 0.9rem;
    line-height: 1.4;
  }
  
  .fc-daygrid-day {
    min-height: 60px !important;
    height: 60px !important;
  }
  
  .fc-daygrid-day-frame {
    min-height: 60px !important;
  }
  
  .fc-event {
    font-size: 10px !important;
    padding: 1px 2px !important;
  }
  
  .fc-daygrid-day-number {
    font-size: 0.75rem !important;
    padding: 2px !important;
  }
  
  .fc-toolbar {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .fc-toolbar-chunk {
    display: flex;
    justify-content: center;
  }
  
  .tooltip {
    max-width: 80vw;
    font-size: 0.75rem;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: var(--spacing-sm);
  }
  
  .surface {
    padding: var(--spacing-md);
  }
  
  .fc-daygrid-day {
    min-height: 50px !important;
    height: 50px !important;
  }
  
  .fc-daygrid-day-frame {
    min-height: 50px !important;
  }
  
  .checkbox-item {
    padding: var(--spacing-sm);
  }
  
  .category-tasks .checkbox-item {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .checkbox-text {
    font-size: 0.85rem;
  }
  
  .category-title {
    font-size: 0.95rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .snackbar {
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    right: var(--spacing-md);
    transform: translateY(100px);
    max-width: none;
  }
  
  .snackbar.show {
    transform: translateY(0);
  }
}

/* Submit Info */
.submit-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--md-surface-variant);
  border-radius: var(--spacing-sm);
}

#submitter-info {
  color: var(--md-on-surface-variant);
  font-size: 0.875rem;
}

#submitter-info strong {
  color: var(--md-on-surface);
  font-weight: 500;
}

/* Store Selector */
.store-selector {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--md-surface-variant);
  border-radius: var(--spacing-sm);
  border: 1px solid var(--md-outline-variant);
}

.store-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 500;
  color: var(--md-on-surface);
  white-space: nowrap;
}

.store-label .material-icons {
  color: var(--md-primary);
  font-size: 20px;
}

.store-dropdown {
  flex: 1;
  padding: var(--spacing-md);
  border: 1px solid var(--md-outline);
  border-radius: var(--spacing-sm);
  font-size: 1rem;
  background-color: var(--md-surface);
  color: var(--md-on-surface);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.store-dropdown:focus {
  outline: none;
  border-color: var(--md-primary);
  border-width: 2px;
}

.store-dropdown:required:invalid {
  border-color: var(--md-error);
}

/* Category Section */
.category-section {
  margin-bottom: var(--spacing-lg);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--spacing-sm);
  overflow: hidden;
}

.category-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--md-primary-container);
  color: var(--md-on-primary-container);
  cursor: pointer;
  margin: 0;
  font-size: 1.125rem;
  font-weight: 500;
  transition: background-color 0.2s ease;
  user-select: none;
}

.category-title:hover {
  background-color: var(--md-primary);
  color: var(--md-on-primary);
}

.category-title.collapsed {
  background-color: var(--md-surface-variant);
  color: var(--md-on-surface-variant);
}

.category-title .material-icons {
  font-size: 20px;
  transition: transform 0.2s ease;
}

.category-tasks {
  background-color: var(--md-surface);
  display: block;
}

/* Updated Checkbox Items for Categories */
.category-tasks .checkbox-item {
  padding: var(--spacing-md);
  margin-bottom: 0;
  border-bottom: 1px solid var(--md-outline-variant);
}

.category-tasks .checkbox-item:last-child {
  border-bottom: none;
}

.category-tasks .checkbox-item:hover {
  background-color: var(--md-surface-variant);
}

/* Calendar Store Selector Mobile */
.calendar-store-selector {
  flex-direction: column;
  align-items: stretch;
  gap: var(--spacing-sm);
}

.calendar-store-selector .store-label {
  justify-content: center;
}