/* css/components.css */

/* ========== BASE COMPONENTS ========== */

/* Button Component */
.btn {
  display: inline-block;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  width: 100%;
  margin-bottom: var(--space-sm);
  box-shadow: var(--shadow-sm);
  user-select: none;
}

.btn:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background-color: var(--color-text-muted);
}

.btn-secondary:hover {
  background-color: var(--color-text);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: white;
}

.btn-small {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.875rem;
}

.btn-icon {
  width: auto;
  padding: var(--space-sm);
  border-radius: 50%;
  aspect-ratio: 1;
}

/* Page Container */
.page {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-card);
}

/* ========== CATEGORY COMPONENT ========== */
.category {
  background-color: var(--color-card);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.category:hover {
  box-shadow: var(--shadow-md);
}

.category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  user-select: none;
}

.category-header h3 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  flex: 1;
}

.category-total {
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 var(--space-md);
  font-size: 1.125rem;
}

.toggle-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.toggle-btn:hover {
  background-color: var(--color-background);
  color: var(--color-primary);
}

.category-items {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base) ease;
  background-color: var(--color-card);
}

.category-items.expanded {
  max-height: 500px;
  overflow-y: auto;
}

/* ========== ITEM COMPONENT ========== */
.item {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-card);
  margin: var(--space-xs) var(--space-lg);
  border-radius: var(--radius-md);
  gap: var(--space-md);
  transition: all var(--transition-fast);
  position: relative;
}

.item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.item-name {
  flex: 1;
  font-size: 1rem;
  transition: color var(--transition-fast);
}

.item[data-done="true"] .item-name {
  text-decoration: line-through;
  color: var(--color-text-muted);
  opacity: 0.7;
}

.item-price {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.875rem;
  background-color: var(--color-background);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.delete-item {
  background: none;
  border: none;
  color: #ff4444;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--transition-fast);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.item:hover .delete-item {
  opacity: 1;
}

.delete-item:hover {
  background-color: rgba(255, 68, 68, 0.1);
}

/* ========== FORM COMPONENTS ========== */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 500;
  color: var(--color-text);
}

.form-input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background-color: var(--color-card);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(74, 74, 255, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.form-select {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--radius-md);
  font-size: 1rem;
  background-color: var(--color-card);
  color: var(--color-text);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23666' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-md) center;
  background-size: 16px;
  padding-right: 40px;
}

.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* ========== BOTTOM SHEET COMPONENT ========== */
.bottom-sheet {
  position: fixed;
  bottom: -100%;
  left: 0;
  width: 100%;
  background-color: var(--color-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-lg);
  transition: bottom 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  max-height: 90vh;
  overflow-y: auto;
}

.bottom-sheet.show {
  bottom: 0;
}

.bottom-sheet-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-background);
  position: sticky;
  top: 0;
  background-color: var(--color-card);
  z-index: 1;
}

.bottom-sheet-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.close-sheet {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: 50%;
}

.close-sheet:hover {
  background-color: var(--color-background);
}

.bottom-sheet-content {
  padding: var(--space-lg);
}

.bottom-sheet-actions {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background-color: var(--color-card);
  position: sticky;
  bottom: 0;
}

.bottom-sheet-actions .btn {
  flex: 1;
  margin: 0;
}

/* ========== THEME TOGGLE COMPONENT ========== */
.theme-toggle {
  position: fixed;
  top: var(--space-md);
  right: var(--space-md);
  background-color: var(--color-card);
  border: none;
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  font-size: 1.25rem;
  z-index: 100;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  transform: rotate(15deg) scale(1.1);
}

/* ========== EMPTY STATES ========== */
.empty-state {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  color: var(--color-text-muted);
  font-style: italic;
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

/* ========== LOADING STATES ========== */
.loading-indicator {
  position: fixed;
  top: 20px;
  right: 20px;
  background-color: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  box-shadow: var(--shadow-md);
}

.loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ========== NOTIFICATION COMPONENT ========== */
.notification {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-100%);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  color: white;
  font-weight: 500;
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 400px;
  width: 90%;
}

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

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

.notification-error {
  background-color: #f44336;
}

.notification-info {
  background-color: var(--color-primary);
}

.notification-warning {
  background-color: #ff9800;
}

/* ========== LANDING PAGE ========== */
.landing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  gap: var(--space-md);
}

.landing h1 {
  font-size: 2rem;
  margin-bottom: var(--space-xl);
  text-align: center;
}

.landing .btn {
  max-width: 500px;
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 768px) {
  .page {
    padding: var(--space-md);
  }
  
  .category-header {
    padding: var(--space-sm) var(--space-md);
  }
  
  .item {
    padding: var(--space-sm) var(--space-md);
    margin: var(--space-xs) var(--space-md);
  }
  
  .bottom-sheet-content {
    padding: var(--space-md);
  }
  
  .bottom-sheet-actions {
    padding: var(--space-md);
  }
  
  .theme-toggle {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  :root {
    --space-lg: 16px;
    --space-md: 12px;
    --space-sm: 8px;
  }
  
  .page-header {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
  
  .category-header {
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
  }
  
  .category-header h3 {
    font-size: 1rem;
  }
  
  .category-total {
    margin: var(--space-xs) 0;
  }
  
  .item {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
  
  .delete-item {
    position: absolute;
    top: var(--space-xs);
    right: var(--space-xs);
    opacity: 1;
  }
}

/* ========== DARK MODE ENHANCEMENTS ========== */
[data-theme="dark"] .form-input,
[data-theme="dark"] .form-select {
  border-color: #444;
  background-color: #2a2a30;
}

[data-theme="dark"] .item {
  background-color: #2a2a30;
}

[data-theme="dark"] .category {
  background-color: #2a2a30;
}

[data-theme="dark"] .theme-toggle {
  background-color: #2a2a30;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(0);
  }
}

.category {
  animation: fadeIn 0.3s ease-out;
}

.item {
  animation: slideIn 0.2s ease-out;
}

/* ========== UTILITY CLASSES ========== */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.hidden {
  display: none !important;
}

.visible {
  visibility: visible;
}

.invisible {
  visibility: hidden;
}

.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gap-sm {
  gap: var(--space-sm);
}

.gap-md {
  gap: var(--space-md);
}

.gap-lg {
  gap: var(--space-lg);
}

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }