/*
 * Tension v1 — Components (architectural wireframe)
 * Buttons, chips, tags, badges, nav, search, TOC, comments, lightbox, terminal,
 * floating actions. Preserves all JS-hook class names.
 */

/* ── Buttons ── */
.lc-button,
.lc-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-family: var(--lc-font-mono);
  font-size: var(--lc-text-label-md);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--lc-on-primary);
  background: var(--lc-primary);
  border: 1px solid var(--lc-primary);
  cursor: pointer;
  transition: background var(--lc-transition), color var(--lc-transition), border-color var(--lc-transition);
}

.lc-button:hover,
.lc-btn:hover {
  background: var(--lc-on-surface);
  color: var(--lc-on-primary);
}

html[data-lc-color-scheme="dark"] .lc-button:hover,
html[data-lc-color-scheme="dark"] .lc-btn:hover {
  background: var(--lc-surface-container-lowest);
  color: var(--lc-primary);
  border-color: var(--lc-primary);
}

.lc-button:active,
.lc-btn:active {
  opacity: 0.9;
}

.lc-button--ghost {
  background: var(--lc-surface-container-lowest);
  color: var(--lc-primary);
  border-color: var(--lc-outline-variant);
}

.lc-button--ghost:hover,
.lc-button--ghost:focus-visible,
html[data-lc-color-scheme="dark"] .lc-button--ghost:hover,
html[data-lc-color-scheme="dark"] .lc-button--ghost:focus-visible {
  background: var(--lc-primary);
  border-color: var(--lc-primary);
  color: var(--lc-on-primary);
}

/* Shared hover-lift was removed (no shadow / no translate in wireframe). */
.lc-pressable {
  cursor: pointer;
  transition: background var(--lc-transition), border-color var(--lc-transition), color var(--lc-transition);
}

@media (hover: hover) {
  .lc-pressable:hover {
    background: var(--lc-surface-container-low);
  }
}

/* Legacy alias — Tension buttons are monochrome primary. */
.lc-button--lime,
.lc-button--lime:hover,
.lc-button--lime:focus-visible {
  background: var(--lc-primary);
  color: var(--lc-on-primary);
}

/* ── Chips / tag variants ── */
/* ── Footer badges ── */
.lc-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.1875rem 0.5rem;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
  font-family: var(--lc-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--lc-text-secondary);
  transition: border-color var(--lc-transition), color var(--lc-transition);
}

.lc-badge:hover {
  border-color: var(--lc-primary);
  color: var(--lc-primary);
}

.lc-badge__label {
  color: var(--lc-text-secondary);
}

.lc-badge__value {
  color: var(--lc-primary);
}

/* Filter chips — idle hairline, active ink stamp */
.lc-filter-chip {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--lc-outline-variant);
  background: var(--lc-surface-container-low);
  color: var(--lc-on-surface-variant);
  font-family: var(--lc-font-mono);
  font-size: var(--lc-text-caption);
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background var(--lc-transition), color var(--lc-transition), border-color var(--lc-transition);
}

@media (max-width: 767px) {
  .lc-filter-chip {
    min-height: 2.75rem;
    padding: 0.5rem 0.75rem;
  }
}

.lc-filter-chip:hover {
  border-color: var(--lc-primary);
  color: var(--lc-primary);
}

.lc-filter-chip.is-active {
  background: var(--lc-primary);
  border-color: var(--lc-primary);
  color: var(--lc-on-primary);
}

.lc-filter-chip.is-active:hover {
  color: var(--lc-on-primary);
}

.lc-notice {
  padding: 0.75rem 1rem;
  border: 1px solid var(--lc-outline-variant);
  background: var(--lc-surface-container-low);
  color: var(--lc-on-surface);
  font-family: var(--lc-font-body);
  font-size: var(--lc-text-body-sm);
}

.lc-notice--success {
  border-color: var(--lc-primary);
}

.lc-notice--error {
  border-color: var(--lc-error);
  color: var(--lc-error);
}

/* ── Header nav (desktop + mobile) ── */
.lc-nav__list > li.menu-item {
  position: relative;
}

.lc-nav__label {
  white-space: nowrap;
}

.lc-nav__list > li.menu-item > a,
.lc-nav__list > li.menu-item > .lc-nav__trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.5rem;
  font-family: var(--lc-font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--lc-on-surface-variant);
  transition: color var(--lc-transition), background var(--lc-transition);
}

.lc-nav__list > li.menu-item > a:hover,
.lc-nav__list > li.menu-item > .lc-nav__trigger:hover {
  color: var(--lc-primary);
  background: var(--lc-surface-container-low);
}

.lc-nav__list > li.menu-item > a.lc-nav__link--current,
.lc-nav__list > li.menu-item > .lc-nav__trigger.lc-nav__link--current {
  color: var(--lc-primary);
  font-weight: 600;
  position: relative;
}

.lc-nav__list > li.menu-item > a.lc-nav__link--current::after,
.lc-nav__list > li.menu-item > .lc-nav__trigger.lc-nav__link--current::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  bottom: 0;
  height: 2px;
  background: var(--lc-primary);
}

.lc-nav__list .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  padding: 0.25rem;
  background: var(--lc-surface-container-lowest);
  border: 1px solid var(--lc-border-divider);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
  z-index: 50;
  list-style: none;
  margin: 0;
}

.lc-nav__list .menu-item:hover > .sub-menu,
.lc-nav__list .menu-item:focus-within > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lc-nav__list .sub-menu a {
  display: block;
  padding: 0.375rem 0.625rem;
  color: var(--lc-on-surface-variant);
  font-size: 0.8125rem;
  transition: color var(--lc-transition), background var(--lc-transition);
}

.lc-nav__list .sub-menu a:hover {
  color: var(--lc-primary);
  background: var(--lc-surface-container-low);
}

.lc-nav__chevron {
  font-size: 1.125rem;
  transition: transform 0.2s ease;
}

.lc-nav__list > li.menu-item-has-children:hover > .lc-nav__trigger .lc-nav__chevron {
  transform: rotate(180deg);
}

/* ── Section chrome: paper rail + small ink kicker (not a black banner) ── */
.lc-ink-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--lc-unit-md);
  padding: 0.75rem var(--lc-unit-md);
  background: var(--lc-surface-container-low);
  color: var(--lc-on-surface-variant);
  border-bottom: 1px solid var(--lc-outline-variant);
  font-family: var(--lc-font-mono);
  font-size: var(--lc-text-caption);
  letter-spacing: 0.04em;
}

.lc-ink-bar__label {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--lc-unit-sm);
  min-width: 0;
}

.lc-ink-bar__kicker {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.4rem;
  background: var(--lc-primary);
  color: var(--lc-on-primary);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lc-ink-bar__sep {
  color: var(--lc-outline-variant);
}

.lc-article-card__excerpt {
  display: none;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

@media (min-width: 768px) {
  .lc-article-card__excerpt {
    display: -webkit-box;
  }
}

.lc-article-card__read {
  display: none;
  flex-shrink: 0;
  padding-top: 0.25rem;
  font-family: var(--lc-font-mono);
  font-size: var(--lc-text-caption);
  color: var(--lc-text-secondary);
}

.lc-article-card:hover .lc-article-card__read {
  color: var(--lc-primary);
}

@media (min-width: 768px) {
  .lc-article-card__read {
    display: inline-flex;
  }
}

.lc-article-card__read-time {
  display: none;
}

@media (min-width: 768px) {
  .lc-article-card__read-time {
    display: inline;
  }
}

.lc-ink-bar__title {
  margin: 0;
  font-family: var(--lc-font-display);
  font-size: var(--lc-text-headline-sm);
  font-weight: 600;
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--lc-on-surface);
}

.lc-ink-bar a,
.lc-ink-bar .lc-ink-bar__action {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--lc-text-secondary);
  transition: color var(--lc-transition);
}

.lc-ink-bar a:hover,
.lc-ink-bar .lc-ink-bar__action:hover {
  color: var(--lc-primary);
}

.lc-ink-bar .lc-material-icon {
  font-size: 14px;
}

/* In-section titles: stamp + Chinese, no gray rail (rail is for page/column edges). */
.lc-ink-bar--inline {
  background: transparent;
  border-bottom: 0;
  padding: 0;
  margin-bottom: var(--lc-unit-md);
}

.lc-section__header--nested.lc-ink-bar {
  margin-bottom: 0;
}

.lc-ink-bar__action-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--lc-unit-sm);
}

/* Article list row: cover / ink placeholder + left-edge hover */
.lc-article-card {
  position: relative;
}

.lc-article-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  background: var(--lc-primary);
  transition: width var(--lc-transition);
  pointer-events: none;
  z-index: 1;
}

.lc-article-card:hover::before {
  width: 2px;
}

.lc-page-card {
  position: relative;
}

.lc-page-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  background: var(--lc-primary);
  transition: width var(--lc-transition);
  pointer-events: none;
  z-index: 1;
}

.lc-page-card:hover::before {
  width: 2px;
}

.lc-article-card__media {
  position: relative;
  z-index: 0;
  flex-shrink: 0;
  width: 3.5rem;
  height: 3.5rem;
  overflow: hidden;
  border: 1px solid var(--lc-outline-variant);
  background: var(--lc-primary);
  color: var(--lc-on-primary);
}

@media (min-width: 768px) {
  .lc-article-card__media {
    width: 6.5rem;
    height: 6.5rem;
  }
}

.lc-article-card__cover-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lc-article-card__media-fallback {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100%;
  height: 100%;
  padding: 0.35rem 0.4rem;
}

.lc-article-card__media-index {
  font-family: var(--lc-font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
}

.lc-article-card__media-cat {
  font-family: var(--lc-font-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  opacity: 0.72;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@media (max-width: 767px) {
  .lc-article-card__media-cat {
    display: none;
  }

  .lc-article-card__media-fallback {
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .lc-article-card::before {
    transition: none;
  }
}

/* Archive project card — screenshot occupies the top half */
.lc-project-item {
  padding: 0;
}

.lc-project-item--compact {
  padding: var(--lc-unit-xl);
}

.lc-project-item__cover {
  position: relative;
  aspect-ratio: 4 / 3;
  max-height: 16rem;
  overflow: hidden;
  border-bottom: 1px solid var(--lc-outline-variant);
  background: var(--lc-primary);
}

@media (min-width: 1024px) {
  .lc-project-item__cover {
    aspect-ratio: 16 / 10;
    max-height: none;
  }
}

.lc-project-item__shot {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lc-project-item__cover--logo,
.lc-project-item__cover--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--lc-primary);
}

.lc-project-item__cover--logo {
  background: var(--lc-surface-container-low);
}

.lc-project-item__cover-logo {
  width: 4.5rem;
  height: 4.5rem;
  object-fit: contain;
}

.lc-project-item__cover-initial {
  font-family: var(--lc-font-display);
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--lc-on-primary);
}

.lc-project-item__cover-meta {
  position: absolute;
  inset: var(--lc-unit-sm);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  pointer-events: none;
  z-index: 1;
}

.lc-project-item__cover-meta a {
  pointer-events: auto;
}

.lc-project-item__status {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.2rem 0.4rem;
  background: var(--lc-surface-container-lowest);
  border: 1px solid var(--lc-outline-variant);
  font-family: var(--lc-font-mono);
  font-size: var(--lc-text-caption);
  color: var(--lc-text-secondary);
}

.lc-project-item__logo-badge {
  position: absolute;
  left: var(--lc-unit-sm);
  bottom: var(--lc-unit-sm);
  display: flex;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--lc-outline-variant);
  background: var(--lc-surface-container-lowest);
  padding: 0.2rem;
  z-index: 1;
}

.lc-project-item__logo-badge img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Home sidebar project row: 64px landscape thumb + left-edge hover */
.lc-project-card {
  position: relative;
}

.lc-project-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  background: var(--lc-primary);
  transition: width var(--lc-transition);
  pointer-events: none;
  z-index: 1;
}

.lc-project-card:hover::before {
  width: 2px;
}

.lc-project-card__thumb {
  display: flex;
  width: 4rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
}

.lc-project-card__thumb-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lc-project-card__thumb-logo {
  width: 1.75rem;
  height: 1.75rem;
  object-fit: contain;
}

.lc-project-card__thumb-initial {
  font-family: var(--lc-font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--lc-on-surface);
}

/* Project detail hero shot */
.lc-project-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--lc-outline-variant);
  background: var(--lc-surface-container-low);
}

.lc-project-hero .lc-lightbox-trigger {
  display: block;
}

.lc-project-hero .lc-lightbox-trigger img,
.lc-project-hero__shot {
  display: block;
  width: 100%;
  height: min(28rem, 52vh);
  object-fit: cover;
}

.lc-project-item__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--lc-unit-lg);
}

.lc-project-item--compact .lc-project-item__body {
  padding: 0;
}

.lc-projects-archive .lc-project-item {
  border-bottom: 1px solid var(--lc-outline-variant);
}

@media (min-width: 1024px) {
  .lc-projects-archive .lc-project-item:nth-child(odd) {
    border-right: 1px solid var(--lc-outline-variant);
  }
}

/* Card title underline reveal (wireframe: left-to-right hairline draw) */
.lc-article-card__title a,
.lc-project-card__title a {
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  transition: background-size 0.2s var(--lc-ease-out);
}

.lc-article-card__title a:hover,
.lc-project-card__title a:hover {
  background-size: 100% 1px;
}

/* ── Search inline (header palette) ── */
.lc-search-inline__container {
  display: flex;
  align-items: center;
  height: 2.25rem;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
  transition: border-color var(--lc-transition);
}

.lc-search-inline__container:focus-within {
  border-color: var(--lc-primary);
}

.lc-search-inline__input {
  color: var(--lc-on-surface);
}

/* Hide the native "search cancel" × in WebKit/Blink — we render our own
   #searchClose button instead, so only one clear control shows. */
.lc-search-inline__input::-webkit-search-cancel-button,
.lc-search-inline__input::-webkit-search-decoration,
.lc-search-inline__input::-webkit-search-results-button,
.lc-search-inline__input::-webkit-search-results-decoration {
  -webkit-appearance: none;
  appearance: none;
}

.lc-search-inline__input::-ms-clear {
  display: none;
}

.lc-search-inline__input::placeholder {
  color: var(--lc-text-muted);
}

.lc-search-inline__kbd {
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container);
  color: var(--lc-text-secondary);
}

.lc-search-inline__panel {
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
}

/* Small screens: the inline field is hidden until the icon toggle opens it. */
@media (max-width: 1023px) {
  .lc-search-inline {
    display: none;
  }

  .lc-search-inline.is-open {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    top: 4rem;
    width: 100%;
    padding: 0.5rem 1rem;
    margin: 0;
    z-index: 60;
    background: var(--lc-surface-container-lowest);
    border-bottom: 1px solid var(--lc-border-divider);
  }

  .lc-search-inline.is-open .lc-search-inline__panel {
    position: static;
    margin-top: 0.5rem;
  }
}

.lc-search-inline__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

@media (max-width: 1023px) {
  .lc-search-inline.is-open .lc-search-inline__close {
    width: 2.75rem;
    height: 2.75rem;
    min-width: 44px;
    min-height: 44px;
  }
}

.lc-search-inline__result {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  min-height: 2.75rem;
  padding: 0.5rem 0.625rem;
  border: 0;
  border-left: 2px solid transparent;
  background: transparent;
  color: var(--lc-on-surface);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--lc-transition), border-color var(--lc-transition);
}

.lc-search-inline__result:hover,
.lc-search-inline__result.is-active {
  background: var(--lc-surface-container-low);
  border-left-color: var(--lc-primary);
}

.lc-search-inline__result-type {
  flex-shrink: 0;
  white-space: nowrap;
  color: var(--lc-text-secondary);
  font-size: 0.75rem;
  font-family: var(--lc-font-mono);
}

.lc-search-inline__result-thumb {
  display: block;
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  object-fit: cover;
  border: 1px solid var(--lc-outline-variant);
  background: var(--lc-surface-container-low);
}

.lc-search-inline__result-thumb--empty {
  background: var(--lc-primary);
}

.lc-search-inline__result-title {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.lc-search-inline__status {
  color: var(--lc-text-secondary);
}

/* ── Terminal code blocks (single post) ── */
.lc-terminal {
  margin: 1.5rem 0;
  border: 1px solid var(--lc-terminal-border);
  overflow: hidden;
  background: var(--lc-terminal-bg);
}

.lc-terminal__header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5rem 0.875rem;
  background: var(--lc-terminal-header);
  border-bottom: 1px solid var(--lc-terminal-border);
}

.lc-terminal__dots {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  flex-shrink: 0;
}

.lc-terminal__dot {
  width: 0.65rem;
  height: 0.65rem;
  border: 1px solid var(--lc-terminal-border);
  flex-shrink: 0;
}

.lc-terminal__dot--red { background: var(--lc-terminal-dot-red); }
.lc-terminal__dot--yellow { background: var(--lc-terminal-dot-yellow); }
.lc-terminal__dot--green { background: var(--lc-terminal-dot-green); }

.lc-terminal__title {
  font-family: var(--lc-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  color: var(--lc-terminal-title);
}

.lc-terminal__title:empty::before {
  content: "code";
  opacity: 0.65;
}

.lc-terminal--code pre,
.lc-terminal pre {
  margin: 0;
  padding: 1rem 1.25rem;
  background: var(--lc-terminal-bg);
  color: var(--lc-terminal-text);
  font-family: var(--lc-font-mono);
  font-size: 0.875rem;
  line-height: 1.65;
  overflow-x: auto;
  border: none;
  white-space: pre;
  word-break: normal;
}

.lc-terminal--code pre code,
.lc-terminal pre code {
  display: block;
  padding: 0;
  border: none;
  background: transparent;
  color: inherit;
  font-size: inherit;
  line-height: inherit;
  white-space: inherit;
  word-break: inherit;
}

/* ── Footer badges ── */

/* ── TOC ── */
.lc-toc__title {
  font-family: var(--lc-font-display);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--lc-on-surface);
}

.lc-toc__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--lc-border-divider);
}

.lc-toc__icon {
  flex-shrink: 0;
  width: 1rem;
  height: 1rem;
  color: var(--lc-primary);
}

.lc-toc__list,
.lc-toc__sublist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lc-toc__sublist {
  padding-left: 0.625rem;
  margin-top: 0.125rem;
  margin-bottom: 0.25rem;
  border-left: 1px solid var(--lc-border-divider);
}

.lc-toc__item {
  margin: 0;
}

.lc-toc__link {
  display: block;
  padding: 0.25rem 0.5rem;
  border-left: 2px solid transparent;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--lc-text-secondary);
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: color var(--lc-transition), border-color var(--lc-transition), background var(--lc-transition);
}

.lc-toc__item--level-2 > .lc-toc__link {
  font-weight: 600;
}

.lc-toc__item--level-3 .lc-toc__link {
  font-size: 0.8125rem;
  font-weight: 400;
  padding-left: 1rem;
  opacity: 0.9;
}

.lc-toc__link--active {
  color: var(--lc-primary);
  font-weight: 600;
  background: var(--lc-surface-container-low);
  border-left-color: var(--lc-primary);
  border-left-width: 2px;
}

.lc-toc__item--level-3 .lc-toc__link--active {
  font-weight: 600;
}

.lc-toc__link:hover:not(.lc-toc__link--active) {
  background: var(--lc-surface-container-low);
  color: var(--lc-on-surface);
}

.lc-toc__toggle {
  display: none;
}

@media (max-width: 1023px) {
  .lc-toc__toggle {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--lc-border-divider);
    background: var(--lc-surface-container-lowest);
    color: var(--lc-on-surface);
    font-family: var(--lc-font-mono);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: border-color var(--lc-transition);
  }

  .lc-toc__toggle:hover {
    border-color: var(--lc-primary);
  }

  .lc-toc__list:not(.is-open) {
    display: none;
  }
}

/* ── Comments ── */
.lc-comments-tech {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--lc-border-divider);
}

.lc-comments-tech__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--lc-border-divider);
}

.lc-comments-tech__header--empty {
  border-bottom: none;
}

.lc-comments-tech__title-wrap {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  flex: 1;
  min-width: 0;
}

.lc-comments-tech__title-wrap .lc-section__header--nested {
  display: block;
  flex: 1;
  min-width: 0;
  margin-bottom: 0;
}

.lc-comments-tech__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--lc-primary);
  color: var(--lc-on-primary);
}

.lc-comments-tech__title {
  font-family: var(--lc-font-display);
  font-size: var(--lc-text-headline-md);
  font-weight: 600;
  margin: 0;
}

.lc-comments-tech__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.lc-comment-thread {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
}

.lc-comment-thread > .lc-comment-thread__children {
  list-style: none;
  margin: 0;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-low);
  display: flex;
  flex-direction: column;
}

.lc-comment-tech {
  padding: 0;
  scroll-margin-top: calc(var(--lc-navbar-h, 72px) + 1.5rem);
}

.lc-comment-tech__body {
  padding: 1rem;
}

.lc-comment-thread > .lc-comment-thread__children .lc-comment-tech__body {
  padding: 0.75rem 0;
}

.lc-comment-tech__header {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.lc-comment-tech__avatar-wrap {
  position: relative;
  flex-shrink: 0;
}

.lc-comment-feed__avatar-wrap--sm {
  width: 2.5rem;
  height: 2.5rem;
  line-height: 0;
}

.lc-avatar {
  position: relative;
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}

.lc-avatar--56 { width: 3.5rem; height: 3.5rem; }
.lc-avatar--32 { width: 1.75rem; height: 1.75rem; }

.lc-avatar__fallback {
  display: none;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container);
  color: var(--lc-on-surface);
  font-family: var(--lc-font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1;
}

.lc-avatar.is-fallback img {
  display: none;
}

.lc-avatar.is-fallback .lc-avatar__fallback {
  display: inline-flex;
}

.lc-comment-tech__avatar {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lc-comment-tech__meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.lc-comment-tech__author-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.lc-comment-tech__author {
  font-family: var(--lc-font-display);
  font-size: 1rem;
  font-weight: 600;
}

.lc-comment-tech__author a {
  color: inherit;
}

.lc-comment-tech__author a:hover {
  color: var(--lc-primary);
}

.lc-comment-tech__info-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.lc-comment-tech__time,
.lc-comment-tech__edit a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--lc-font-mono);
  font-size: 0.75rem;
  color: var(--lc-on-surface-variant);
}

.lc-comment-tech__edit a:hover {
  color: var(--lc-primary);
}

.lc-comment-tech__content {
  font-size: var(--lc-text-body-md);
  line-height: 1.65;
  color: var(--lc-on-surface);
}

.lc-comment-tech__content p {
  margin: 0.75rem 0;
}

.lc-comment-tech__content a {
  color: var(--lc-primary);
  font-weight: 600;
}

.lc-comment-tech__footer {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--lc-border-divider-soft);
}

.lc-comment-tech__footer .comment-reply-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--lc-primary);
  font-size: 0.8125rem;
  font-weight: 600;
}

.lc-comment-feed__reply-to {
  display: block;
  flex-basis: 100%;
  width: 100%;
  margin-bottom: 0.125rem;
  font-family: var(--lc-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.02em;
  color: var(--lc-on-surface-variant);
}

.lc-comment-feed__reply-to-link {
  color: var(--lc-text-muted);
}

.lc-comment-feed__reply-to-link--nested {
  font-family: var(--lc-font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--lc-primary);
}

.lc-comment-feed__reply-to-link--nested::before {
  content: "RE ";
  color: var(--lc-text-muted);
}

.lc-comment-feed__footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.lc-comment-feed__reply,
.lc-comment-feed__reply-cancel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  min-height: 2.75rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
  color: var(--lc-on-surface-variant);
  font-family: var(--lc-font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background var(--lc-transition), color var(--lc-transition), border-color var(--lc-transition);
}

.lc-comment-feed__reply:hover,
.lc-comment-feed__reply-cancel:hover,
.lc-comment-feed__reply:focus-visible,
.lc-comment-feed__reply-cancel:focus-visible {
  background: var(--lc-primary);
  border-color: var(--lc-primary);
  color: var(--lc-on-primary);
  text-decoration: none;
}

.lc-comment-feed__reply-form {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--lc-border-divider);
}

.lc-comment-feed__reply-form[hidden],
.lc-comment-feed__reply-form:not([hidden]):not(.is-open) {
  display: none;
}

.lc-comment-feed__reply-form.is-open {
  display: block;
}

.lc-comment-tech.is-highlighted,
.lc-comment-thread:has(> .lc-comment-thread__children).is-highlighted {
  outline: 2px solid var(--lc-primary);
  outline-offset: 2px;
}

/* ── Comment form ── */
.lc-comments-tech__respond {
  position: relative;
  margin-top: 2.5rem;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
  scroll-margin-top: calc(var(--lc-navbar-h, 72px) + 1.5rem);
}

.lc-comments-tech__form-header.lc-ink-bar {
  margin: 0;
}

.lc-comments-tech__form-header .lc-comments-tech__form-title {
  margin: 0;
  font-family: inherit;
  font-size: inherit;
  font-weight: 400;
  letter-spacing: inherit;
  text-transform: none;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
}

.lc-comments-tech__respond .lc-comment-form-tech:not(.lc-comment-feed__reply-form-inner),
.lc-comments-tech__respond .comment-form {
  padding: 1.25rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: start;
}

.lc-comments-tech__respond .lc-comment-form-tech:not(.lc-comment-feed__reply-form-inner) p,
.lc-comments-tech__respond .comment-form p {
  margin: 0;
}

@media (min-width: 768px) {
  .lc-comments-tech__respond .lc-comment-form-tech:not(.lc-comment-feed__reply-form-inner),
  .lc-comments-tech__respond .comment-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.25rem;
    padding: 1.5rem;
  }
}

.lc-comments-tech__respond .lc-comment-form-tech .lc-comment-form-tech__field--full,
.lc-comments-tech__respond .lc-comment-form-tech .lc-comment-form-tech__field--textarea,
.lc-comments-tech__respond .lc-comment-form-tech .form-submit,
.lc-comments-tech__respond .lc-comment-form-tech p.form-submit,
.lc-comments-tech__respond .lc-comment-form-tech .comment-form-cookies-consent,
.lc-comments-tech__respond .lc-comment-form-tech .lc-comment-form-tech__logged-in-as,
.lc-comments-tech__respond .lc-comment-form-tech .lc-comment-form-tech__must-log-in,
.lc-comments-tech__respond .lc-comment-form-tech .logged-in-as,
.lc-comments-tech__respond .lc-comment-form-tech .must-log-in {
  grid-column: 1 / -1;
}

.lc-comments-tech__respond .lc-comment-form-tech .form-submit {
  justify-self: start;
}

.lc-comments-tech__respond .lc-comment-form-tech .lc-comment-form-tech__field--textarea .lc-comment-form-tech__textarea {
  min-height: 8rem;
  resize: vertical;
}

.lc-comments-tech__respond .lc-comment-form-tech .comment-form-cookies-consent {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-family: var(--lc-font-ui);
  font-size: var(--lc-text-body-sm);
  line-height: 1.5;
  color: var(--lc-on-surface-variant);
}

.lc-comments-tech__respond .lc-comment-form-tech .comment-form-cookies-consent input {
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.lc-comments-tech__respond .lc-comment-form-tech .comment-form-cookies-consent label {
  font-family: inherit;
  font-size: inherit;
  text-transform: none;
  letter-spacing: 0;
  color: inherit;
}

.lc-comment-form-tech__field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.lc-comment-form-tech__label {
  font-family: var(--lc-font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--lc-on-surface);
}

.lc-comment-form-tech__required {
  color: var(--lc-error);
}

.lc-comment-form-tech__input,
.lc-comment-form-tech__textarea,
.lc-comment-form-tech input[type="text"],
.lc-comment-form-tech input[type="email"],
.lc-comment-form-tech input[type="url"],
.lc-comment-form-tech textarea,
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-family: var(--lc-font-body);
  font-size: var(--lc-text-body-md);
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-low);
  color: var(--lc-on-surface);
  outline: none;
  transition: border-color var(--lc-transition), background var(--lc-transition);
}

.lc-comment-form-tech__input:focus,
.lc-comment-form-tech__textarea:focus,
.comment-form input:focus,
.comment-form textarea:focus {
  border-color: var(--lc-primary);
  background: var(--lc-surface-container-lowest);
  outline: none;
}

.lc-comment-form-tech input::placeholder,
.comment-form input::placeholder,
.lc-comment-form-tech textarea::placeholder,
.comment-form textarea::placeholder {
  color: var(--lc-on-surface-variant);
}

.lc-comment-form-tech__submit,
.comment-form .submit input,
.comment-form .submit button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border: 1px solid var(--lc-primary);
  background: var(--lc-primary);
  color: var(--lc-on-primary);
  font-family: var(--lc-font-mono);
  font-size: var(--lc-text-label-md);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--lc-transition), color var(--lc-transition);
}

.lc-comment-form-tech__submit:hover,
.comment-form .submit input:hover,
.comment-form .submit button:hover {
  background: var(--lc-on-surface);
  color: var(--lc-on-primary);
}

html[data-lc-color-scheme="dark"] .lc-comment-form-tech__submit:hover,
html[data-lc-color-scheme="dark"] .comment-form .submit input:hover,
html[data-lc-color-scheme="dark"] .comment-form .submit button:hover {
  background: var(--lc-surface-container-lowest);
  color: var(--lc-primary);
  border-color: var(--lc-primary);
}

.lc-comment-form-tech__must-log-in,
.lc-comment-form-tech__logged-in-as,
.comment-form .logged-in-as,
.comment-form .must-log-in {
  font-size: var(--lc-text-body-md);
  color: var(--lc-on-surface-variant);
}

.lc-comment-form-tech__must-log-in a,
.lc-comment-form-tech__logged-in-as a {
  color: var(--lc-primary);
  font-weight: 600;
}

.lc-comment-form-tech__cancel {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--lc-text-secondary);
  font-size: 0.8125rem;
  background: none;
  border: none;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
}

.lc-comment-form-tech__cancel:hover {
  color: var(--lc-on-surface);
  text-decoration: underline;
}

.lc-comment-feed__reply-form-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  align-items: start;
}

.lc-comment-feed__reply-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  grid-column: 1 / -1;
}

/* ── Lightbox ── */
.lc-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--lc-overlay);
  align-items: center;
  justify-content: center;
}

.lc-lightbox--active {
  display: flex;
}

.lc-lightbox__close,
.lc-lightbox__nav {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--lc-primary);
  background: var(--lc-primary);
  color: var(--lc-on-primary);
  cursor: pointer;
  z-index: 2;
  transition: opacity var(--lc-transition);
}

.lc-lightbox__close:hover,
.lc-lightbox__nav:hover {
  opacity: 0.85;
}

.lc-lightbox__close {
  top: 1rem;
  right: 1rem;
}

.lc-lightbox__nav--prev { left: 1rem; }
.lc-lightbox__nav--next { right: 1rem; }

.lc-lightbox__content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  overflow: hidden;
  touch-action: none;
}

.lc-lightbox__img {
  max-height: 90vh;
  max-height: 90dvh;
  max-width: 90vw;
  object-fit: contain;
  border: 1px solid var(--lc-border-divider);
  transform-origin: center center;
  will-change: transform;
  user-select: none;
  -webkit-user-drag: none;
  touch-action: none;
  cursor: zoom-in;
}

.lc-lightbox--loading .lc-lightbox__img {
  opacity: 0.25;
  transition: opacity 0.15s ease;
}

.lc-lightbox--zoomed .lc-lightbox__img { cursor: grab; }
.lc-lightbox--dragging .lc-lightbox__img { cursor: grabbing; }

.lc-lightbox__counter {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--lc-on-primary);
  font-family: var(--lc-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  background: var(--lc-primary);
  border: 1px solid var(--lc-primary);
  padding: 0.25rem 0.75rem;
}

/* ── Share buttons ── */
.lc-share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--lc-border-divider);
  background: transparent;
  color: var(--lc-text-secondary);
  cursor: pointer;
  transition: border-color var(--lc-transition), color var(--lc-transition);
}

.lc-share-btn:hover {
  border-color: var(--lc-primary);
  color: var(--lc-primary);
}

/* ── Floating actions ── */
.lc-floating-actions {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 40;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.lc-floating-actions--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lc-floating-toc,
.lc-floating-comments,
.lc-back-to-top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--lc-border-divider);
  background: var(--lc-surface-container-lowest);
  color: var(--lc-on-surface);
  cursor: pointer;
  font-size: 0.75rem;
  transition: border-color var(--lc-transition), color var(--lc-transition);
}

.lc-floating-toc:hover,
.lc-floating-comments:hover,
.lc-back-to-top:hover {
  border-color: var(--lc-primary);
  color: var(--lc-primary);
}

.lc-back-to-top__icon {
  width: 1rem;
  height: 1rem;
}

.lc-floating-toc-group {
  position: relative;
}

.lc-floating-toc__panel {
  position: absolute;
  bottom: 0;
  right: calc(100% + 0.75rem);
  z-index: 49;
  width: max-content;
  max-width: min(18rem, calc(100vw - 5rem));
  max-height: 60vh;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 1rem;
  background: var(--lc-surface-container-lowest);
  border: 1px solid var(--lc-border-divider);
  opacity: 0;
  visibility: hidden;
  transform: translateX(8px);
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
}

.lc-floating-toc__panel.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.lc-floating-toc__inner .lc-toc__header {
  display: flex;
  margin-bottom: 0.625rem;
  padding-bottom: 0.5rem;
}

.lc-floating-toc__inner .lc-toc__toggle {
  display: none;
}

.lc-floating-toc__inner .lc-toc__list {
  display: block !important;
}

.lc-floating-toc.is-active {
  background: var(--lc-primary);
  color: var(--lc-on-primary);
}

@media (min-width: 1024px) {
  body:has(.lc-article__toc-sidebar) .lc-floating-toc,
  body:has(.lc-article__toc-sidebar) .lc-floating-toc__panel {
    display: none !important;
  }
}