/* Navigation Layout - BEM naming */

.nav {
  position: relative;
}

.nav__toggle {
  display: none;
}

.nav__toggle-label {
  display: none;
  flex-direction: column;
  cursor: pointer;
  width: 24px;
  height: 24px;
  justify-content: space-around;
  position: relative;
  flex-shrink: 0;
}

.nav__toggle-label span,
.nav__toggle-label span::before,
.nav__toggle-label span::after {
  display: block;
  height: 2px;
  width: 100%;
  background-color: white;
  transition: all 0.3s ease;
  position: relative;
}

.nav__toggle-label span::before,
.nav__toggle-label span::after {
  content: '';
  position: absolute;
}

.nav__toggle-label span::before {
  top: -8px;
}

.nav__toggle-label span::after {
  top: 8px;
}

/* Hamburger animation */
.nav__toggle:checked ~ .nav__toggle-label span {
  background-color: transparent;
}

.nav__toggle:checked ~ .nav__toggle-label span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav__toggle:checked ~ .nav__toggle-label span::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav__menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-lg);
}

.nav__link {
  color: white;
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  transition: color 0.2s ease;
}

.nav__link:hover {
  color: var(--color-primary-light);
  text-decoration: none;
}

/* Legacy classes for backwards compatibility */
.nav-main {
  position: relative;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  flex-direction: column;
  cursor: pointer;
  width: 24px;
  height: 24px;
  justify-content: space-around;
  position: relative;
  flex-shrink: 0;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
  display: block;
  height: 2px;
  width: 100%;
  background-color: white;
  transition: all 0.3s ease;
  position: relative;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
  content: '';
  position: absolute;
}

.nav-toggle-label span::before {
  top: -8px;
}

.nav-toggle-label span::after {
  top: 8px;
}

/* Hamburger animation for legacy classes */
.nav-toggle:checked ~ .nav-toggle-label span {
  background-color: transparent;
}

.nav-toggle:checked ~ .nav-toggle-label span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle:checked ~ .nav-toggle-label span::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-lg);
}

.nav-menu li {
  margin-left: var(--spacing-sm);
}

.nav-menu a {
  color: white;
  font-weight: 500;
  padding: var(--spacing-sm) 0;
  transition: color 0.2s ease;
}

.nav-menu a:hover {
  text-decoration: underline;
}

/* Desktop Dropdown Styles */
.nav-dropdown {
  position: relative;
}

.nav-dropdown__trigger {
  background: none;
  border: none;
  color: white;
  font-weight: 500;
  font-size: inherit;
  font-family: inherit;
  padding: var(--spacing-sm) 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s ease;
}

.nav-dropdown__trigger:hover {
  text-decoration: underline;
}

.nav-dropdown__arrow {
  transition: transform 0.2s ease;
}

.nav-dropdown:hover .nav-dropdown__arrow,
.nav-dropdown:focus-within .nav-dropdown__arrow {
  transform: rotate(180deg);
}

.nav-dropdown__menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  padding: var(--spacing-sm) 0;
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 1000;
}

.nav-dropdown:hover .nav-dropdown__menu,
.nav-dropdown:focus-within .nav-dropdown__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown__menu li {
  margin: 0;
}

.nav-dropdown__menu a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text);
  font-weight: 400;
  transition: background-color 0.2s ease;
}

.nav-dropdown__menu a:hover {
  background-color: var(--color-background-light);
  text-decoration: none;
}

.nav-dropdown__divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--spacing-xs) 0;
}

/* Right-aligned dropdown for items near the right edge */
.nav-dropdown:last-child .nav-dropdown__menu {
  left: auto;
  right: 0;
}

/* Mobile navigation styles */
@media (max-width: 768px) {
  .nav-toggle-label {
    display: flex;
  }

  /* Anchor the menu panel to the header (full width), not the nav element */
  .nav-main {
    position: static;
  }

  /* Full-width slide-down panel — single column, large touch targets */
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background-color: white;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    flex-direction: column;
    align-items: stretch;
    /* Padding must collapse with the panel — max-height: 0 alone leaves a
       visible padding strip bleeding over the page content. */
    padding: 0 var(--spacing-md);
    z-index: 1000;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.25s ease, padding 0.25s ease, visibility 0.25s;
  }

  .nav-toggle:checked ~ .nav-menu {
    max-height: 100vh;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-lg);
    overflow-y: auto;
    visibility: visible;
  }

  .nav-menu li {
    display: block;
    width: 100%;
    margin: 0;
  }

  .nav-menu > li {
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-menu > li:last-child {
    border-bottom: none;
  }

  .nav-menu a {
    color: var(--color-text) !important;
    display: block;
    width: 100%;
    box-sizing: border-box;
    padding: 0.875rem var(--spacing-sm);
    font-size: 1.0625rem;
    text-decoration: none;
    border-radius: var(--radius-sm);
  }

  .nav-menu a:hover,
  .nav-menu a:active {
    background-color: var(--color-background-light);
    color: var(--color-primary) !important;
    text-decoration: none;
  }

  /* Dropdown sections render as headed groups, stacked vertically */
  .nav-dropdown {
    width: 100%;
  }

  .nav-dropdown__trigger {
    color: var(--color-text-light);
    display: flex;
    width: 100%;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem var(--spacing-sm) var(--spacing-xs);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    cursor: default;
  }

  .nav-dropdown__arrow {
    display: none;
  }

  .nav-dropdown__menu {
    position: static;
    display: block;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: transparent;
    border: none;
    margin: 0 0 var(--spacing-sm);
    padding: 0;
    min-width: 0;
    width: 100%;
  }

  .nav-dropdown__menu li {
    display: block;
    width: 100%;
  }

  .nav-dropdown__menu a {
    padding: 0.75rem var(--spacing-md);
    font-size: 1rem;
  }

  .nav-dropdown__divider {
    border-top: 1px solid var(--color-border-light);
    margin: var(--spacing-xs) var(--spacing-sm);
  }
}