/* ============================================
   QuietPrincess — Responsive Styles
   ============================================ */

/* === Mobile Navigation === */

/* Show hamburger button (overrides main.css display: none) */
.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: calc(var(--z-header) + 1);
}

/* Hamburger bar spans */
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: var(--transition-fast);
  transform-origin: center;
}

/* Hamburger → X animation */
.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Hide nav links on mobile (overrides main.css flex column) */
.nav-links {
  display: none;
}

/* Nav links open state (dropdown) */
.nav-links.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-xs) 0;
  z-index: var(--z-overlay);
}

/* Full-width tap targets in dropdown */
.nav-links.open a {
  padding: var(--spacing-xs) var(--container-padding);
  display: block;
}

/* Header container needs relative positioning for absolute dropdown */
.site-header .container {
  position: relative;
}

/* === Tablet (768px) === */

@media (min-width: 768px) {

  /* Hide hamburger */
  .nav-toggle {
    display: none;
  }

  /* Show horizontal nav links */
  .nav-links {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-sm);
    position: static;
    background: none;
    border: none;
    padding: 0;
  }

  /* Reset mobile padding on nav links */
  .nav-links a {
    padding: 0;
    display: inline;
  }

  /* Layout enhancements */
  .container {
    padding: 0 var(--spacing-md);
  }

  .section {
    padding: var(--spacing-lg) 0;
  }

  .section--alt {
    padding: var(--spacing-lg) 0;
  }

  .hero-section {
    padding: var(--spacing-xl) 0;
  }

  /* Book grid: 2 columns on tablet */
  .book-grid .card {
    max-width: calc(50% - var(--spacing-sm) / 2);
  }
}

/* === Desktop (1024px) === */

@media (min-width: 1024px) {

  /* Layout enhancements */
  .hero-section {
    padding: calc(var(--spacing-xl) * 1.25) 0;
  }

  .section,
  .section--alt {
    padding: var(--spacing-xl) 0;
  }

  /* Book grid: 4 columns on desktop */
  .book-grid .card {
    max-width: calc(25% - var(--spacing-sm) * 3 / 4);
  }
}