.day-nav {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  gap: 6px;
  width: 100%;
  margin: 20px 0 16px;
  align-items: center;
}

.day-nav button {
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--surface);
  color: var(--text-main);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
}

.day-nav button:hover:not(:disabled) {
  background-color: var(--surface-hover);
}

.day-nav input[type="date"] {
  display: block;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 44px;
  padding: 6px 8px;
  text-align: center;
  font-weight: 700;
  font-size: 0.88rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-sizing: border-box;
}

@media (min-width: 480px) {
  .day-nav {
    grid-template-columns: 48px minmax(0, 1fr) 48px;
    gap: 8px;
  }
  
  .day-nav button {
    min-width: 48px;
    min-height: 48px;
  }
  
  .day-nav input[type="date"] {
    font-size: 0.95rem;
    padding: 8px 12px;
    min-height: 48px;
  }
}