/*
|--------------------------------------------------------------------------
| Navigation
|--------------------------------------------------------------------------
*/

.nav {
  position: fixed;

  left: 2rem;
  bottom: 2rem;

  z-index: 990;

  display: flex;
  flex-direction: column;

  gap: 0.75rem;

  padding: 0.85rem 1rem;

  min-width: 220px;

  border: 1px solid transparent;

  opacity: 1;

  transition:
    opacity 0.3s ease,
    background 0.3s ease,
    border-color 0.3s ease,
    backdrop-filter 0.3s ease;
}

.nav-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.nav-controls {
  position: fixed;
  top: 2rem;
  right: 2rem;

  z-index: 1001;

  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-burger,
.nav-backdrop {
  display: none;
  border: 0;
  padding: 0;
  background: transparent;
}

.nav-burger {
  color: var(--text);
}

.nav-controls .nav-burger {
  position: static;

  width: 34px;
  height: 34px;

  border-radius: 999px;

  border: 1px solid var(--line);

  background: color-mix(in srgb, var(--bg) 78%, transparent);

  display: flex;
  align-items: center;
  justify-content: center;

  backdrop-filter: blur(12px);

  transition: var(--transition);
}

.nav-controls .nav-burger:hover {
  transform: scale(1.05);
  border-color: var(--text);
}

.nav-actions {
  margin-top: 0.5rem;
  padding-top: 0.75rem;

  display: flex;
  justify-content: center;

  border-top: 1px solid var(--line);
}

/*
|--------------------------------------------------------------------------
| Scroll Overlay State
|--------------------------------------------------------------------------
*/

.nav.scrolled {
  background: rgba(10, 10, 10, 0.08);

  backdrop-filter: blur(8px);

  border-color: transparent;

  opacity: 0.5;
}

.nav.scrolled:hover {
  opacity: 1;
}

[data-theme="light"] .nav.scrolled {
  background: rgba(255, 255, 255, 0.1);
}

/*
|--------------------------------------------------------------------------
| Groups
|--------------------------------------------------------------------------
*/

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: 100%;
}

.nav-item[data-nav-group] {
  flex-wrap: wrap;
}

.nav-item[data-nav-group] .nav-main-link {
  flex: 1;
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.nav-main-row {
  display: flex;
  align-items: center;
  justify-content: space-between;

  gap: 1rem;
}

/*
|--------------------------------------------------------------------------
| Main Links
|--------------------------------------------------------------------------
*/

.nav-main-link {
  position: relative;

  display: inline-flex;
  align-items: center;

  gap: 0.4rem;

  color: var(--muted);

  text-decoration: none;

  font-size: var(--text-sm);

  transition: var(--transition);
  margin-top: 0.5rem;
  font-size: var(--text-xs);
  color: var(--muted);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-main-link:hover,
.nav-main-link.active {
  color: var(--text);
}

/*
|--------------------------------------------------------------------------
| Active Marker
|--------------------------------------------------------------------------
*/

.active-marker {
  opacity: 0;

  transition: opacity 0.2s ease;
}

.nav-main-link.active .active-marker {
  opacity: 1;
}

/*
|--------------------------------------------------------------------------
| Expand Button
|--------------------------------------------------------------------------
*/

.nav-toggle {
  width: 1.25rem;
  height: 1.25rem;

  border: none;
  background: transparent;

  color: var(--muted);

  cursor: pointer;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  padding: 0;

  transition: var(--transition);
}

.nav-toggle::before {
  content: "▸";

  font-size: 0.72rem;
  line-height: 1;
}

.nav-item.is-open .nav-toggle::before {
  content: "▾";
}

.nav-toggle:hover {
  color: var(--text);
}

/*
|--------------------------------------------------------------------------
| Submenu
|--------------------------------------------------------------------------
*/

.nav-item.is-open {
  flex-direction: column;
  align-items: flex-start;
}

.nav-submenu {
  list-style: none;

  padding: 0;
  margin: 0;

  display: none;
  gap: 0.35rem;

  padding-left: 1rem;

  border-left: 1px solid var(--line);
}

.nav-item.is-open .nav-submenu {
  display: grid;
}

.nav-submenu a {
  color: var(--muted);

  text-decoration: none;

  font-size: var(--text-xs);

  letter-spacing: 0.03em;

  transition: var(--transition);
}

.nav-submenu a:hover,
.nav-submenu a.active {
  color: var(--text);

  transform: translateX(2px);
}

/*
|--------------------------------------------------------------------------
| External Link
|--------------------------------------------------------------------------
*/

.nav-external {
  margin-top: 0.5rem;

  font-size: var(--text-xs);

  color: var(--muted);

  text-decoration: none;

  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav-external:hover {
  color: var(--text);
}

/*
|--------------------------------------------------------------------------
| Mobile
|--------------------------------------------------------------------------
*/

@media (max-width: 640px) {
  .nav {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;

    min-width: unset;
  }

  .nav-controls {
    top: 1rem;
    right: 1rem;
  }

  .nav-burger {
    top: 1rem;
    right: calc(1rem + 34px + 0.5rem);
  }
}

@media (max-width: 1024px) {
  .nav {
    inset: 0;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    min-width: 0;
    padding: 0;
    background: transparent;
    pointer-events: none;
  }

  .nav-panel {
    position: fixed;
    top: 4.75rem;
    left: 50%;
    right: auto;
    bottom: auto;
    z-index: 992;

    width: min(calc(100% - 2rem), 24rem);
    max-height: calc(100vh - 6.75rem);
    overflow: auto;

    padding: 1.25rem;
    gap: 1rem;

    align-items: flex-start;
    text-align: left;

    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(18px);
    border: 1px solid var(--line);
    border-radius: 1.4rem;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);

    transform: translateX(-50%) translateY(-0.5rem);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;

    transition:
      opacity 200ms ease,
      transform 200ms ease,
      visibility 200ms ease;
  }

  .nav.is-open .nav-panel {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    visibility: visible;
    pointer-events: auto;
  }

  .nav-backdrop {
    position: fixed;
    inset: 0;
    z-index: 991;

    display: block;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;

    background: color-mix(in srgb, var(--bg) 56%, transparent);
    backdrop-filter: blur(10px);

    transition:
      opacity 200ms ease,
      visibility 200ms ease;
  }

  .nav.is-open .nav-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-burger {
    display: inline-flex;
    justify-content: center;
    cursor: pointer;
    pointer-events: auto;
  }

  .nav-burger-icon {
    display: inline-flex;
    flex-direction: column;
    gap: 3px;
    width: 0.95rem;
  }

  .nav-burger-icon span {
    display: block;
    width: 100%;
    height: 1px;
    background: currentColor;
    transition:
      transform 200ms ease,
      opacity 200ms ease;
  }

  .nav.is-open .nav-burger-icon span:nth-child(1) {
    transform: translateY(4px) rotate(45deg);
  }

  .nav.is-open .nav-burger-icon span:nth-child(2) {
    opacity: 0;
  }

  .nav.is-open .nav-burger-icon span:nth-child(3) {
    transform: translateY(-4px) rotate(-45deg);
  }

  .nav-item {
    flex-wrap: nowrap;
    justify-content: flex-start;
    text-align: left;
  }

  .nav-item[data-nav-group] {
    align-items: flex-start;
  }

  .nav-item.is-open {
    align-items: flex-start;
  }

  .nav-main-link {
    font-size: var(--text-sm);
    justify-content: flex-start;
    width: auto;
    text-align: left;
  }

  .nav-submenu {
    padding-left: 0;
    border-left: 0;
    justify-items: start;
    width: 100%;
  }

  .nav-submenu a {
    display: inline-block;
    text-align: left;
  }

  .nav-actions,
  .nav-footer {
    width: 100%;
  }

  .nav-actions {
    padding-top: 0.75rem;
    margin-top: 0.25rem;
    border-top: 1px solid var(--line);
  }

  .nav-actions .theme-toggle {
    position: static;
    top: auto;
    right: auto;
    margin: 0;
  }

  .nav-footer {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;

    padding-top: 0.75rem;
    margin-top: 0.25rem;

    border-top: 1px solid var(--line);

    color: var(--muted);
    font-size: var(--text-xs);
    letter-spacing: 0.03em;
  }

  .nav-footer a {
    color: var(--muted);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.08em;
  }

  .nav-footer a:hover {
    color: var(--text);
  }
}

.nav.is-hidden {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}