/* ============================================================
   ARTICLE PAGE STYLES — dedicated, self-contained
   Loaded AFTER style.css so these win conflicts
   ============================================================ */

/* Reading progress bar */
.mr-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--color-primary, #3a5b43);
  z-index: 1000;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* ============================================================
   Article layout — TWO COLUMN GRID
   ============================================================ */
.mr-article {
  display: block;
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  box-sizing: border-box;
}

@media (min-width: 1024px) {
  .mr-article {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 4.5rem;
    padding: 3rem 2.5rem 5rem;
    align-items: start;
  }
}

.mr-article__body {
  min-width: 0;
  max-width: 720px;
}

/* ============================================================
   Article content typography
   ============================================================ */
.mr-content {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-text, #2a2820);
}

.mr-content > *:first-child {
  margin-top: 0;
}

.mr-content p {
  margin: 0 0 1.25em;
}

.mr-content h2 {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 2.5em 0 0.75em;
  color: var(--color-text, #2a2820);
  scroll-margin-top: 100px;
  letter-spacing: -0.01em;
}

.mr-content h3 {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  font-size: 1.1875rem;
  font-weight: 600;
  margin: 2em 0 0.5em;
  color: var(--color-primary, #3a5b43);
  scroll-margin-top: 100px;
}

.mr-content h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5em 0 0.5em;
}

.mr-content ul,
.mr-content ol {
  margin: 0 0 1.25em;
  padding-left: 1.5em;
}

.mr-content li {
  margin: 0 0 0.5em;
  line-height: 1.7;
}

.mr-content a {
  color: var(--color-primary, #3a5b43);
  text-decoration: underline;
  text-decoration-color: rgba(58, 91, 67, 0.3);
  text-underline-offset: 0.2em;
  transition: text-decoration-color 0.15s;
}

.mr-content a:hover {
  text-decoration-color: var(--color-primary, #3a5b43);
}

.mr-content blockquote {
  margin: 2em 0;
  padding: 1.25em 1.5em;
  border-left: 3px solid var(--color-primary, #3a5b43);
  background: var(--color-surface-2, rgba(58, 91, 67, 0.05));
  font-style: italic;
  color: var(--color-text-muted, #555);
  border-radius: 0 8px 8px 0;
}

.mr-content hr {
  margin: 2em 0;
  border: 0;
  border-top: 1px solid var(--color-divider, #e0dac9);
}

.mr-content strong {
  font-weight: 600;
  color: var(--color-text, #2a2820);
}

.mr-content em {
  font-style: italic;
}

/* ============================================================
   Sidebar TOC (desktop)
   ============================================================ */
.mr-toc {
  display: none;
}

@media (min-width: 1024px) {
  .mr-toc {
    display: block;
  }
}

.mr-toc__sticky {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 130px);
  overflow-y: auto;
  padding-right: 0.5rem;
}

/* Hide scrollbar but keep functionality */
.mr-toc__sticky::-webkit-scrollbar {
  width: 4px;
}
.mr-toc__sticky::-webkit-scrollbar-thumb {
  background: var(--color-divider, #d4cdb8);
  border-radius: 2px;
}

.mr-toc__label {
  font-family: 'Inter', sans-serif;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint, #8e887a);
  margin: 0 0 1.25rem;
  padding: 0;
}

.mr-toc__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mr-toc__list li {
  margin: 0;
  padding: 0;
  list-style: none;
}

.mr-toc__link {
  display: block;
  padding: 0.5rem 0;
  font-family: 'Inter', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.45;
  color: var(--color-text-muted, #6b6557);
  text-decoration: none;
  border: 0;
  background: none;
  transition: color 0.15s;
}

.mr-toc__link:hover {
  color: var(--color-text, #2a2820);
  text-decoration: none;
}

.mr-toc__link.is-active {
  color: var(--color-primary, #3a5b43);
  font-weight: 600;
}

/* ============================================================
   Mobile TOC (collapsible)
   ============================================================ */
.mr-toc-m {
  display: block;
  background: var(--color-surface-2, #f5efe0);
  border: 1px solid var(--color-divider, #e0dac9);
  border-radius: 10px;
  margin: 0 0 2rem;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .mr-toc-m {
    display: none;
  }
}

.mr-toc-m__summary {
  padding: 0.875rem 1.125rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text, #2a2820);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.mr-toc-m__summary::-webkit-details-marker,
.mr-toc-m__summary::marker {
  display: none;
  content: '';
}

.mr-toc-m__chevron {
  font-size: 0.75rem;
  transition: transform 0.2s;
  color: var(--color-text-muted, #6b6557);
}

.mr-toc-m[open] .mr-toc-m__chevron {
  transform: rotate(180deg);
}

.mr-toc-m__list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-divider, #e0dac9);
  background: var(--color-surface, #faf6ef);
}

.mr-toc-m__list li {
  padding: 0;
  margin: 0;
  list-style: none;
  border-bottom: 1px solid var(--color-divider, #e8e0cc);
}

.mr-toc-m__list li:last-child {
  border-bottom: none;
}

.mr-toc-m__list a {
  display: block;
  padding: 0.75rem 1.125rem;
  color: var(--color-text, #2a2820);
  text-decoration: none;
  font-size: 0.9375rem;
  line-height: 1.4;
}

.mr-toc-m__list a:hover {
  background: var(--color-surface-2, #f0e9d8);
  color: var(--color-primary, #3a5b43);
}

/* ============================================================
   Back-to-top floating button
   ============================================================ */
.mr-totop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary, #3a5b43);
  color: #faf6ef;
  border: none;
  font-size: 1.25rem;
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s, background 0.15s;
  z-index: 50;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.mr-totop.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.mr-totop:hover {
  background: var(--color-primary-hover, #2e4a36);
}

@media (max-width: 640px) {
  .mr-totop {
    bottom: 1.25rem;
    right: 1.25rem;
  }
}

/* ============================================================
   SHARE + BOOKMARK BAR
   ============================================================ */

/* Floating vertical bar (desktop) */
.mr-share {
  display: none;
}

@media (min-width: 1280px) {
  .mr-share {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: fixed;
    left: max(1.5rem, calc((100vw - 1280px) / 2 - 60px));
    top: 50%;
    transform: translateY(-50%);
    z-index: 40;
  }
}

.mr-share__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-divider, #d4cdb8);
  background: var(--color-surface, #faf6ef);
  color: var(--color-text-muted, #6b6557);
  cursor: pointer;
  text-decoration: none;
  font-size: 0;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.15s;
  padding: 0;
  position: relative;
}

.mr-share__btn svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.8;
}

.mr-share__btn:hover {
  background: var(--color-primary, #3a5b43);
  border-color: var(--color-primary, #3a5b43);
  color: #faf6ef;
  transform: translateY(-1px);
}

.mr-share__btn.is-bookmarked {
  background: var(--color-primary, #3a5b43);
  border-color: var(--color-primary, #3a5b43);
  color: #faf6ef;
}

.mr-share__btn.is-bookmarked svg {
  fill: currentColor;
}

/* Tooltip on hover */
.mr-share__btn::after {
  content: attr(data-tip);
  position: absolute;
  left: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  background: var(--color-text, #2a2820);
  color: var(--color-surface, #faf6ef);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.375rem 0.625rem;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s, transform 0.15s;
}

.mr-share__btn:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

/* Inline horizontal share bar (mobile/tablet) */
.mr-share-m {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin: 0 0 1.5rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--color-divider, #e0dac9);
  border-bottom: 1px solid var(--color-divider, #e0dac9);
}

@media (min-width: 1280px) {
  .mr-share-m {
    display: none;
  }
}

.mr-share-m__label {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint, #8e887a);
  margin-right: 0.25rem;
}

.mr-share-m .mr-share__btn {
  width: 38px;
  height: 38px;
}

/* Copy-link toast */
.mr-toast {
  position: fixed;
  bottom: 5rem;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--color-text, #2a2820);
  color: var(--color-surface, #faf6ef);
  padding: 0.75rem 1.25rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.mr-toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}