.app {
  min-height: 100dvh;
  display: grid;
  grid-template-rows: 1fr auto;
}

.app-main {
  padding-bottom: calc(var(--fs-space-xl) + 72px);
}

.app-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--fs-space-xs);
  padding: var(--fs-space-xs) var(--fs-space-md) calc(var(--fs-space-xs) + env(safe-area-inset-bottom));
  border-top: 1px solid var(--fs-color-border);
  background: color-mix(in srgb, var(--fs-color-surface) 92%, transparent);
  backdrop-filter: blur(10px);
}

.nav-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--fs-space-2xs);
  padding: var(--fs-space-xs);
  border-radius: var(--fs-radius-md);
  color: var(--fs-color-text-muted);
  transition: background var(--fs-duration-fast) var(--fs-easing-default),
              color var(--fs-duration-fast) var(--fs-easing-default);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.nav-tab .nav-label {
  font-size: var(--fs-text-xs);
  font-weight: var(--fs-weight-medium);
}

.nav-tab.active {
  color: var(--fs-color-primary);
  background: var(--fs-color-primary-surface);
}

.nav-tab--primary {
  color: var(--fs-color-text-inverse);
  background: var(--fs-color-primary);
}

.nav-tab--primary.active {
  color: var(--fs-color-text-inverse);
  background: var(--fs-color-primary-dark);
}

.screen {
  padding: var(--fs-space-md);
  max-width: 600px;
  margin: 0 auto;
  min-height: 100dvh;
}

@media (min-width: 1024px) {
  .screen { max-width: 1100px; }
}

.screen-header {
  margin-bottom: var(--fs-space-md);
}

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

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

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

.grid-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--fs-space-md);
}

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

.row {
  display: flex;
  gap: var(--fs-space-sm);
  flex-wrap: wrap;
}