/*----------------------*
 * Navigation & filters *
 *----------------------*/
aside#nav {
  display: flex;
  flex-direction: column;
  width: 260px;
  background: var(--bg-alt);
  padding: 1rem;
  border-right: 2px solid var(--border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

:root.dark aside#nav {
  border-color: var(--border);
}

#nav.bg-gradient {
  background: var(--bg-nav-gradient);
}

:root #nav .nav-title {
  background-image: linear-gradient(
    180deg,
    var(--blue-1) 0%,
    var(--blue-2) 40%,
    var(--blue-3) 80%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

:root.dark #nav .nav-title {
  background-image: linear-gradient(
    180deg,
    var(--gold-1) 0%,
    var(--gold-2) 60%,
    var(--gold-3) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-logo {
  transition: opacity 0.3s ease;
}

.logo-dark,
.divider-dark {
  display: none;
}

:root.dark .logo-light,
:root.dark .divider-light {
  display: none;
}

:root.dark .logo-dark,
:root.dark .divider-dark {
  display: block;
}

.nav-divider {
  margin: 0.85rem 0;
  transition: opacity 0.3s ease;
}

#nav h1 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--header);
  letter-spacing: 0.5px;
  margin-bottom: 0.85rem;
}

#nav h1:nth-of-type(1) {
  margin-bottom: calc(0.6rem - 1.111px);
}

#nav .quick-filters {
  margin-bottom: calc(0.25rem + 1.111px);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

hr {
  color: transparent;
  border-color: #999999;
}

:root.dark hr {
  color: transparent;
  border-color: var(--white);
}

/* Filter chips */
.filter-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.filter {
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.1rem;
  background: var(--bg-accent);
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  width: 100px;
  min-width: 100px;
  max-width: 100px;
  justify-content: left;
  transition: 0.3s;
}

.filter input {
  accent-color: var(--header);
}

.filter:hover {
  cursor: pointer;
  transition: 0.3s;
  background: var(--highlight);
}

/* Mod navigation list */
#mod-nav {
  margin: 0;
  margin-left: -8px;
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 363.98px;
  max-height: 363.98px;
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;
  direction: rtl;
}

#mod-nav > li {
  direction: ltr;
}

/* Scrollbar styling for mod navigation */
#mod-nav::-webkit-scrollbar {
  width: 8px;
}

#mod-nav::-webkit-scrollbar-track {
  background: transparent;
}

#mod-nav::-webkit-scrollbar-thumb {
  border-radius: 4px;
}

:root #mod-nav::-webkit-scrollbar-thumb {
  background: var(--blue-2);
}

:root.dark #mod-nav::-webkit-scrollbar-thumb {
  background: var(--gold-2);
}

:root #mod-nav::-webkit-scrollbar-thumb:hover {
  background: var(--blue-1);
}

:root.dark #mod-nav::-webkit-scrollbar-thumb:hover {
  background: var(--gold-1);
}

/* Firefox scrollbar */
:root #mod-nav {
  scrollbar-width: thin;
  scrollbar-color: var(--blue-2) transparent;
}

:root.dark #mod-nav {
  scrollbar-width: thin;
  scrollbar-color: var(--gold-2) transparent;
}

#mod-nav li a {
  display: block;
  padding: 0.25rem;
  text-decoration: none;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.05;
  position: relative;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s, opacity 0.3s;
  opacity: 1;
  text-align: left;
}

#mod-nav li a:focus-visible {
  outline: 2px solid var(--header);
  outline-offset: 2px;
}

#mod-nav li a:hover {
  background: var(--bg-accent);
  color: var(--header);
  border-color: var(--border);
}

#mod-nav li a[data-available="false"] {
  opacity: 0.6;
  cursor: default;
}

#mod-nav li a[data-available="false"]:hover {
  background: transparent;
  color: var(--text-dim);
  border-color: transparent;
}

/* Mod group headers */
#mod-nav li.mod-group > .group-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem;
  justify-content: flex-start;
  text-align: left;
  text-decoration: none;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.05;
  cursor: pointer;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s, opacity 0.3s;
  opacity: 1;
}

:root #mod-nav li.mod-group > .group-header {
  color: #555555;
}

:root.dark #mod-nav li.mod-group > .group-header {
  color: #bebebe;
}

#mod-nav li.mod-group > .group-header:hover {
  background: var(--bg-accent);
  border-color: var(--border);
}

:root #mod-nav li.mod-group > .group-header:hover {
  color: var(--header);
}

:root.dark #mod-nav li.mod-group > .group-header:hover {
  color: var(--header);
}

#mod-nav li.mod-group > .group-header .group-arrow {
  margin-top: 2px;
  font-size: 0.6rem;
  transition: transform 0.3s ease;
}

#mod-nav li.mod-group.expanded > .group-header .group-arrow {
  transform: rotate(180deg);
}

#mod-nav li.mod-group > .group-header .group-name {
  flex: 1;
}

/* Nested mod items within groups */
#mod-nav li.mod-group > .group-children {
  height: 0;
  overflow: hidden;
  transition: height 0.5s ease;
}

#mod-nav li.mod-group.expanded > .group-children {
  height: auto;
}

#mod-nav li.mod-group > .group-children a {
  display: block;
  padding: 0.25rem;
  margin-left: 0.95rem;
  text-decoration: none;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.05;
  text-align: left;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s,
    opacity 0.3s ease, transform 0.3s ease;
  opacity: 0;
  transform: translateY(-6px);
  transition-delay: calc(var(--child-index, 0) * 45ms);
}

#mod-nav li.mod-group > .group-children a:hover {
  background: var(--bg-accent);
  color: var(--header);
  border-color: var(--border);
}

#mod-nav li.mod-group > .group-children a[data-available="false"] {
  opacity: 0.6;
  cursor: default;
}

#mod-nav li.mod-group > .group-children a[data-available="false"]:hover {
  background: transparent;
  color: var(--text-dim);
  border-color: transparent;
}

#mod-nav li.mod-group.group-disabled > .group-header {
  opacity: 0.55;
  cursor: default;
  pointer-events: none;
}

#mod-nav li.mod-group.group-disabled > .group-header:hover {
  background: transparent;
  border-color: transparent;
}

#mod-nav li.mod-group.expanded:not(.collapsing) > .group-children a,
#mod-nav li.mod-group.expanding > .group-children a {
  opacity: 1;
  transform: translateY(0);
}

#mod-nav li.mod-group.collapsing > .group-children a {
  transition-delay: calc(
    (var(--child-count, 1) - var(--child-index, 0) - 1) * 45ms
  );
  opacity: 0;
  transform: translateY(-6px);
}

.nav-loading {
  width: 226px;
  height: 363.98px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.nav-loading img {
  width: 64px;
  height: 64px;
  image-rendering: auto;
  image-rendering: -webkit-optimize-contrast;
}

.nav-loading .spinner-dark {
  display: none;
}

:root.dark .nav-loading .spinner-light {
  display: none;
}

:root.dark .nav-loading .spinner-dark {
  display: block;
}

/* Footer (layout portion only) */
#footer {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  height: 100%;
  width: 100%;
}