#app {
  max-width: var(--app-max-width);
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Header */
.app-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg) 0 var(--space-md);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  border-bottom: 1px solid var(--color-border-light);
}

.app-header__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-normal);
  letter-spacing: var(--letter-spacing-wide);
}

.app-header__back {
  padding: var(--space-sm);
  margin-right: var(--space-sm);
  margin-left: calc(-1 * var(--space-sm));
  display: flex;
  align-items: center;
}

.app-header__back svg {
  width: 20px;
  height: 20px;
}

.app-header__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Main content area */
.app-main {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
}

/* View containers */
.view {
  display: none;
  padding: var(--space-lg) var(--space-md) var(--space-xl) var(--space-lg);
}

.view.active {
  display: block;
}

/* Bottom navigation */
.app-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--app-max-width);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-around;
  z-index: var(--z-sticky);
  padding: var(--space-sm) 0 calc(var(--space-sm) + env(safe-area-inset-bottom, 0px));
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-xs) var(--space-md);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

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

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

/* Modal root */
#modal-root {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-modal);
  pointer-events: none;
}