/* =========================
   Site Navigation
   ========================= */

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--space-16);
}

.logo-link {
  color: var(--color-white);
  font-size: 1.4rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-right li a {
  color: var(--color-white);
  text-decoration: none;
}

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

.site-nav :is(a, button, input):focus-visible {
  outline: var(--space-4) solid var(--color-white);
  outline-offset: var(--space-4);
  box-shadow: 0 0 0 var(--space-8) var(--color-text-primary);
}

/* =========================
   Navigation Buttons
   ========================= */

button.menu-btn,
button.search-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  background: none;
  cursor: pointer;
  transition: background 0.2s;
}

button.menu-btn:hover,
button.search-btn:hover {
  background: var(--color-overlay-light);
}

button.menu-btn svg,
button.search-btn svg {
  display: block;
  width: 1.5rem;
  height: 1.5rem;
  fill: var(--color-white);
}

.search-btn .icon-search {
  display: inline;
}

.search-btn .icon-xmark {
  display: none;
}

.search-btn.active .icon-search {
  display: none;
}

.search-btn.active .icon-xmark {
  display: inline;
}

.nav-search-form {
  display: none;
}

.nav-search-form {
  align-items: stretch;
  min-width: 0;
  min-height: var(--space-48);
  border: var(--space-1px) solid var(--color-border-light);
  border-radius: var(--radius-md);
  background: var(--color-background-surface);
}

.nav-search-form input {
  flex: 1;
  min-width: 0;
  width: 100%;
  margin: 0;
  padding: var(--space-8) var(--space-12);
  border: none;
  outline: none;
  background: transparent;
  color: var(--color-text-secondary);
  font: inherit;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.nav-search-form input::placeholder {
  color: var(--color-text-subtle);
  opacity: 1;
}

.nav-search-form button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--space-48);
  min-width: var(--space-48);
  padding: var(--space-8);
  border: 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  background: var(--color-action-primary);
  color: var(--color-white);
  cursor: pointer;
}

.nav-search-form:focus-within {
  outline: var(--space-4) solid var(--color-white);
  outline-offset: var(--space-4);
  box-shadow: 0 0 0 var(--space-8) var(--color-text-primary);
}

.nav-search-form :is(input, button):focus-visible {
  outline: none;
  box-shadow: none;
}

.nav-search-form button:hover,
.nav-search-form button:focus-visible {
  background: var(--color-action-primary-hover);
}

.nav-search-form button:active {
  background: var(--color-text-primary);
}

.nav-search-form button svg {
  display: block;
  width: 1.25rem;
  height: 1.25rem;
  fill: currentColor;
}

.site-nav.search-active {
  grid-template-columns: 1fr 3rem;
}

.site-nav.search-active .menu-btn,
.site-nav.search-active .logo-link,
.site-nav.search-active .nav-right {
  display: none;
}

.site-nav.search-active .nav-search-form {
  display: flex;
}

/* =========================
   Mobile Menu
   ========================= */

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 75%;
  max-width: 18.75rem;
  height: 100%;
  padding-top: var(--space-64);
  background-color: var(--color-mobile-menu-background);
  transform: translateX(-100%);
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.3s ease, visibility 0s linear 0.3s;
}

.mobile-menu.is-open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
  transition: transform 0.3s ease, visibility 0s;
}

.mobile-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
  list-style: none;
  padding: 0 var(--space-16);
}

.mobile-links li a {
  color: var(--color-white);
  font-size: 1.2rem;
  text-decoration: none;
}

.mobile-links li a:hover {
  text-decoration: underline;
}

.mobile-menu-overlay,
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 900;
  width: 100%;
  height: 100%;
  background: var(--color-overlay-dark);
}

.mobile-menu-overlay.active,
.overlay.active {
  display: block;
}

/* =========================
   RWD (<48rem)
   ========================= */

@media (max-width: 48rem) {
  .desktop-links {
    display: none;
  }

  .site-nav {
    display: grid;
    grid-template-columns: 3rem 1fr 3rem;
    align-items: center;
  }

  .logo-link {
    grid-column: 2 / 3;
    justify-self: center;
    text-align: center;
  }

  button.menu-btn {
    justify-self: start;
  }

  button.search-btn {
    justify-self: end;
  }

  button.menu-btn,
  button.search-btn {
    display: inline-flex;
  }
}