/* =============================================
   Layout — Container, header, nav, grids
   ============================================= */

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding-left: var(--content-padding);
  padding-right: var(--content-padding);
}

/* ── Page wrapper ── */
.page {
  min-height: 100dvh;
  padding-top: calc(var(--header-height) + var(--safe-area-top) + var(--space-md));
  padding-bottom: calc(var(--nav-height) + var(--safe-area-bottom) + var(--space-lg));
}

.page-no-header {
  padding-top: var(--safe-area-top);
}

.page-no-nav {
  padding-bottom: var(--safe-area-bottom);
}

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  height: calc(var(--header-height) + var(--safe-area-top));
  padding-top: var(--safe-area-top);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: var(--content-padding);
  padding-right: var(--content-padding);
  background: rgba(245, 245, 245, 0.82);
  backdrop-filter: blur(var(--blur-md)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--blur-md)) saturate(180%);
  border-bottom: 1px solid var(--color-border);
}

.header-title {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
}

.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  min-width: 44px;
}

.header-right {
  justify-content: flex-end;
}

.header-transparent {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: none;
}

/* ── Large title header (iOS-style) ── */
.page-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  padding: var(--space-sm) 0 var(--space-md);
}

.page-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-top: calc(-1 * var(--space-sm));
  margin-bottom: var(--space-lg);
}

/* ── Bottom navigation ── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-bottom-nav);
  padding-bottom: var(--safe-area-bottom);
}

.bottom-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: var(--nav-height);
  margin: 0 var(--space-sm) var(--space-sm);
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(var(--blur-lg)) saturate(200%);
  -webkit-backdrop-filter: blur(var(--blur-lg)) saturate(200%);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glass-lg);
  padding: 0 var(--space-xs);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  flex: 1;
  height: 100%;
  padding: var(--space-sm) 0;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: color var(--transition-fast),
    transform var(--transition-fast);
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.bottom-nav-item:active {
  transform: scale(0.92);
}

.bottom-nav-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
}

.bottom-nav-icon svg {
  width: 22px;
  height: 22px;
}

.bottom-nav-label {
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.01em;
}

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

.bottom-nav-item.active .bottom-nav-icon {
  transform: scale(1.1);
}

/* Active indicator dot */
.bottom-nav-item.active::after {
  content: '';
  position: absolute;
  bottom: 6px;
  width: 4px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

/* ── Grids ── */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

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

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-md);
}

/* ── Flex utilities ── */
.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-row {
  display: flex;
  flex-direction: row;
}

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

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

.flex-start {
  display: flex;
  align-items: flex-start;
}

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

.flex-wrap {
  flex-wrap: wrap;
}

.flex-1 {
  flex: 1;
}

.flex-shrink-0 {
  flex-shrink: 0;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

/* ── Stack — vertical rhythm ── */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.stack-sm {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.stack-lg {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.stack-xl {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* ── Horizontal scroll ── */
.scroll-x {
  display: flex;
  gap: var(--space-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: var(--space-lg) var(--space-md);
  margin: calc(-1 * var(--space-lg)) calc(-1 * var(--space-md));
}

.scroll-x::-webkit-scrollbar {
  display: none;
}

.scroll-x > * {
  flex-shrink: 0;
}

/* ── Section ── */
.section {
  margin-bottom: var(--space-xl);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
}

.section-action {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  cursor: pointer;
}

/* ── FAB (floating action button) ── */
.fab {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--safe-area-bottom) + var(--space-md));
  right: var(--space-md);
  z-index: var(--z-sticky);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(160, 120, 80, 0.35);
  transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);
  font-size: 24px;
}

.fab:active {
  transform: scale(0.92);
  box-shadow: 0 3px 10px rgba(160, 120, 80, 0.3);
}

.fab-sm {
  width: 44px;
  height: 44px;
  font-size: 20px;
}

/* ── List ── */
.list {
  display: flex;
  flex-direction: column;
}

.list-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  min-height: 52px;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.list-item:last-child {
  border-bottom: none;
}

.list-item-interactive {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.list-item-interactive:active {
  background: rgba(0, 0, 0, 0.03);
}

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

.list-item-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
}

.list-item-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.list-item-trailing {
  flex-shrink: 0;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}

/* ── Safe area spacer ── */
.safe-area-top {
  height: var(--safe-area-top);
}

.safe-area-bottom {
  height: var(--safe-area-bottom);
}

/* ── Responsive adjustments ── */
@media (min-width: 480px) {
  .bottom-nav-inner {
    max-width: var(--content-max-width);
    margin-left: auto;
    margin-right: auto;
  }
}