/* ============================================
   Navigation Components
   Food Cost Control Hub Mini App
   ============================================ */

/* === Header === */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-4);
  background: var(--color-bg);
}

.header-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.header-logo {
  height: 36px;
  width: auto;
  object-fit: contain;
  border-radius: 6px;
}

.header-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.header-action {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  color: var(--color-accent);
  transition: background var(--duration-fast) var(--ease-default);
}

.header-action:active {
  background: var(--color-bg-secondary);
}

/* === Bottom Navigation === */
.bottom-nav {
  display: flex;
  align-items: stretch;
  justify-content: space-around;
  height: var(--nav-height);
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: var(--space-1);
  padding: var(--space-2);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-default);
  position: relative;
}

.nav-item:active {
  transform: scale(0.95);
}

.nav-item.active {
  color: var(--color-accent);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  top: var(--space-1);
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 32px;
  background: var(--color-info-bg);
  border-radius: var(--radius-full);
  z-index: -1;
}

.nav-icon {
  font-size: 24px;
  line-height: 1;
  transition: transform var(--duration-fast) var(--ease-bounce);
}

.nav-item.active .nav-icon {
  transform: scale(1.1);
  animation: navIconPop 0.3s var(--ease-bounce);
}

@keyframes navIconPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1.1); }
}

.nav-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
}

/* Badge on nav item */
.nav-item .badge {
  position: absolute;
  top: var(--space-1);
  right: calc(50% - 24px);
  transform: translateX(100%);
  min-width: 18px;
  height: 18px;
  font-size: 10px;
}

/* === Tab Bar (Alternative inline tabs) === */
.tab-bar {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-1);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
}

.tab-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-default);
}

.tab-item:active {
  opacity: 0.7;
}

.tab-item.active {
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

/* === Segmented Control === */
.segmented-control {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
}

.segment {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-default);
}

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

.segment.active {
  background: var(--color-accent);
  color: var(--color-accent-text);
}

/* === Bottom Sheet === */
.bottom-sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal-backdrop);
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-default);
}

.bottom-sheet-backdrop.visible {
  opacity: 1;
  visibility: visible;
}

.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-modal);
  max-width: var(--max-width);
  margin: 0 auto;
  background: var(--color-bg);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  transform: translateY(100%);
  transition: transform var(--duration-normal) var(--ease-out);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.bottom-sheet.visible {
  transform: translateY(0);
}

.bottom-sheet-handle {
  display: flex;
  justify-content: center;
  padding: var(--space-3);
}

.bottom-sheet-handle::before {
  content: '';
  width: 36px;
  height: 4px;
  background: var(--color-text-secondary);
  border-radius: var(--radius-full);
  opacity: 0.3;
}

.bottom-sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-bg-secondary);
}

.bottom-sheet-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.bottom-sheet-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
}

.bottom-sheet-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  padding-bottom: calc(var(--space-4) + var(--safe-area-bottom));
}

.bottom-sheet-footer {
  padding: var(--space-3) var(--space-4);
  padding-bottom: calc(var(--space-3) + var(--safe-area-bottom));
  border-top: 1px solid var(--color-bg-secondary);
  background: var(--color-bg);
}

/* === Modal === */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal-backdrop);
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--duration-normal) var(--ease-default);
}

.modal-backdrop.visible {
  opacity: 1;
  visibility: visible;
}

.modal {
  width: 100%;
  max-width: 320px;
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  opacity: 0;
  transition: all var(--duration-normal) var(--ease-out);
}

.modal-backdrop.visible .modal {
  transform: scale(1);
  opacity: 1;
}

.modal-header {
  padding: var(--space-4);
  text-align: center;
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.modal-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.modal-body {
  padding: 0 var(--space-4) var(--space-4);
}

.modal-footer {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--color-bg-secondary);
}

.modal-footer .btn {
  flex: 1;
}

/* === Breadcrumb / Back Navigation === */
.back-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  color: var(--color-accent);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
}

.back-nav:active {
  opacity: 0.7;
}

.back-nav-icon {
  font-size: var(--font-size-lg);
}

/* === Quick Actions === */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: var(--space-3);
}

.quick-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--duration-fast) var(--ease-default);
}

.quick-action:active {
  transform: scale(0.97);
  box-shadow: var(--shadow-md);
}

.quick-action-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-info-bg);
  border-radius: var(--radius-lg);
  font-size: 24px;
  color: var(--color-accent);
}

.quick-action-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-align: center;
}