/* sidebar toc — alisa-wuffles-style sticky left rail with scrollspy.
   activates only when `layouts/single.html` renders `.post-with-sidebar` (toc: true + non-empty toc).
   hides below 1100px viewport width so mobile keeps the single-column reading flow. */

.post-with-sidebar {
  position: relative;
}

.toc-sidebar {
  position: fixed;
  left: 1.5rem;
  top: 6rem;
  width: 200px;
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
  z-index: 100;
}

.toc-sidebar .toc-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--body-text-color, #666);
  opacity: 0.6;
  font-weight: 700;
  margin: 0 0 0.6rem;
}

.toc-sidebar ol,
.toc-sidebar ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--border-color, #333);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.toc-sidebar ol ol,
.toc-sidebar ul ul,
.toc-sidebar ol ul,
.toc-sidebar ul ol {
  border-left: none;
  padding-left: 0.75rem;
  margin-top: 0.25rem;
}

.toc-sidebar a {
  font-size: 0.82rem;
  color: var(--body-text-color, #999);
  opacity: 0.7;
  padding-left: 0.75rem;
  display: block;
  line-height: 1.4;
  transition: color 0.15s, opacity 0.15s;
  text-decoration: none;
}

.toc-sidebar a:hover,
.toc-sidebar a.active {
  color: var(--link-color, #4788e2);
  opacity: 1;
}

.toc-sidebar a.active {
  font-weight: 600;
}

@media (max-width: 1100px) {
  .toc-sidebar {
    display: none;
  }
}

/* footer polish — two rows: social icons on top, copyright meta below.
   short faded rule above signals "content ended" without drawing a hard
   full-width divider. inherits theme's color vars so dark/light mode
   both look correct. */

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 2rem 1rem 2.5rem;
  margin-top: 3rem;
  position: relative;
  border-top: none;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 0.6rem);
  max-width: 830px;
  border-top: 1px solid #ececec;
}

/* dark-mode: match the theme's header border color ($dark-light).
   theme triggers dark via html.dark and via prefers-color-scheme when
   html.light isn't set. mirror both. */
html.dark .site-footer::before {
  border-top-color: #1b1d25;
}

@media (prefers-color-scheme: dark) {
  html:not(.light) .site-footer::before {
    border-top-color: #1b1d25;
  }
}

.site-footer__icons {
  display: flex;
  gap: 1.1rem;
  align-items: center;
  justify-content: center;
}

.site-footer__icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--body-text-color, #999);
  opacity: 0.6;
  transition: opacity 0.15s, color 0.15s;
}

.site-footer__icons a:hover {
  color: var(--link-color, #4788e2);
  opacity: 1;
}

.site-footer__icons svg {
  width: 14px;
  height: 14px;
}

.site-footer__meta {
  font-size: 0.78rem;
  color: var(--body-text-color, #999);
  opacity: 0.65;
  text-align: center;
  line-height: 1.5;
}

.site-footer__meta a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: rgba(128, 128, 128, 0.35);
  text-underline-offset: 2px;
  transition: color 0.15s, text-decoration-color 0.15s;
}

.site-footer__meta a:hover {
  color: var(--link-color, #4788e2);
  text-decoration-color: currentColor;
}

.site-footer__sep {
  margin: 0 0.35rem;
  opacity: 0.5;
}

/* mobile menu overlay fix: theme leaves the open menu transparent,
   causing content bleed-through. force an opaque background that
   matches the theme's light/dark background colors. */

input[type="checkbox"]:checked ~ .trigger {
  background: #ffffff;
}

html.dark input[type="checkbox"]:checked ~ .trigger {
  background: #131418;
}

@media (prefers-color-scheme: dark) {
  html:not(.light) input[type="checkbox"]:checked ~ .trigger {
    background: #131418;
  }
}

/* mobile menu spacing: theme puts the mode toggle (a#mode) outside
   the menu list, so it doesn't get the same padding as menu-link
   items. Give it matching top padding so the gap between "about"
   and the toggle matches the gap between "blog" and "about". */

input[type="checkbox"]:checked ~ .trigger a#mode {
  padding-top: 0.6rem;
}