* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  background:
    radial-gradient(circle at 20% 0%, var(--bg-glow-a) 0, rgba(0, 0, 0, 0) 45%),
    radial-gradient(circle at 100% 0%, var(--bg-glow-b) 0, rgba(0, 0, 0, 0) 35%),
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
}

.container {
  width: min(100% - (var(--space-4) * 2), var(--content-max));
  margin-inline: auto;
}

.page-content {
  padding-top: var(--space-5);
  padding-bottom: calc(var(--space-7) + 4.5rem);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  min-height: 4.5rem;
}

.site-header .container {
  width: min(100% - (var(--space-4) * 2), 1460px);
}

.site-nav {
  display: grid;
  gap: var(--space-2);
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + 1px);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition:
    opacity var(--duration-normal) var(--easing-out),
    transform var(--duration-normal) var(--easing-out),
    visibility var(--duration-normal) var(--easing-out);
  z-index: var(--z-drawer);
}

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

.header-auth {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: nowrap;
  justify-content: flex-end;
  min-width: 0;
}

.centered-page {
  max-width: 760px;
  margin-inline: auto;
}

.forum-layout {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.forum-layout>* {
  min-width: 0;
  overflow-wrap: break-word;
  word-break: break-word;
}

.thread-layout {
  display: grid;
  gap: var(--space-4);
}

.footer-inner {
  display: flex;
  gap: var(--space-3);
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0 var(--space-5);
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
}

@media (min-width: 48rem) {
  .site-nav {
    position: static;
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    background: transparent;
    border: 0;
    box-shadow: none;
    margin-left: var(--space-2);
    padding: 0;
    gap: 0.25rem;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: none;
    z-index: auto;
    min-width: 0;
  }

  .drawer-toggle {
    display: none;
  }

  .mobile-only-nav {
    display: none !important;
  }

  .forum-layout {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .site-footer {
    padding-bottom: var(--space-5);
  }
}

@media (max-width: 47.99rem) {
  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .header-auth-desktop {
    display: none;
  }

  .site-nav {
    left: var(--space-4);
    right: var(--space-4);
    border-radius: 0 0 var(--radius-l) var(--radius-l);
    padding: var(--space-4);
  }

  .site-nav .nav-link {
    justify-content: flex-start;
  }

  .site-nav .theme-toggle {
    justify-content: flex-start;
  }

  .nav-logout-form {
    display: block;
  }

  .nav-logout-form .btn {
    width: 100%;
  }
}

@media (min-width: 72rem) {
  .forum-layout {
    grid-template-columns: 250px minmax(0, 1fr) 240px;
    align-items: start;
  }
}