/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
  background: var(--color-surface-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: transparent;
}

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

.btn-fab {
  position: fixed;
  bottom: calc(1.5rem + env(safe-area-inset-bottom));
  right: 1rem;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-lg);
  z-index: 40;
}

.btn-fab:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-xl);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-sm);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.card-subtitle {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Stat cards */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-xs);
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.stat-value.income { color: var(--color-income); }
.stat-value.expense { color: var(--color-expense); }

/* List items */
.list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.list-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.list-item:hover {
  background: var(--color-border-subtle);
}

.list-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.list-item-content {
  flex: 1;
  min-width: 0;
}

.list-item-title {
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.list-item-meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.list-item-amount {
  font-weight: 700;
  font-size: 1rem;
  text-align: right;
  white-space: nowrap;
}

.list-item-amount.income { color: var(--color-income); }
.list-item-amount.expense { color: var(--color-expense); }

/* Progress */
.progress {
  height: 8px;
  background: var(--color-border-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: 0.75rem;
}

.progress-bar {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1rem;
  color: var(--color-text-muted);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* Section header */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

/* Grid layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 1rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 1rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Forms */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-bottom: 1rem;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Toggle */
.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.toggle-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: relative;
  width: 44px;
  height: 24px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.toggle-slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--color-surface);
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.toggle-input:checked + .toggle-slider {
  background: var(--color-primary);
}

.toggle-input:checked + .toggle-slider::after {
  transform: translateX(20px);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-xl);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-surface);
  z-index: 1;
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  position: sticky;
  bottom: 0;
  background: var(--color-surface);
}

@media (min-width: 640px) {
  .modal-overlay {
    align-items: center;
  }

  .modal {
    border-radius: var(--radius-xl);
    max-height: 90vh;
  }
}

/* Form inputs */
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 480px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* Color picker */
.color-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.color-swatch {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 3px solid transparent;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.color-swatch:hover {
  transform: scale(1.1);
}

.color-swatch.selected {
  border-color: var(--color-text);
  transform: scale(1.1);
}

/* Icon picker */
.icon-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.icon-option {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
}

.icon-option:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.icon-option.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: calc(5.5rem + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

@media (min-width: 768px) {
  .toast-container {
    bottom: 1.5rem;
    left: auto;
    right: 1.5rem;
    transform: none;
  }
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  background: var(--color-surface-elevated);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  pointer-events: auto;
  max-width: 360px;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.toast-success .toast-icon { color: var(--color-income); }
.toast-error .toast-icon { color: var(--color-expense); }
.toast-info .toast-icon { color: var(--color-primary); }

/* Dropdown menu */
.dropdown-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.5rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.25rem;
  min-width: 160px;
  z-index: 50;
  display: none;
}

.dropdown-menu.open {
  display: block;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--color-border-subtle);
}

.dropdown-item.danger {
  color: var(--color-expense);
}

.dropdown-item.danger:hover {
  background: var(--color-expense-soft);
}

/* Action menu wrapper */
.action-menu {
  position: relative;
}

/* Theme icon visibility */
[data-theme="light"] .icon-sun,
[data-theme="dark"] .icon-moon {
  display: none;
}

[data-theme="light"] .icon-moon,
[data-theme="dark"] .icon-sun {
  display: block;
}