/* =========================================================
   ARTICLE PAGE
========================================================= */


/* =========================
   PAGE
========================= */

.article-page {
  min-height: 100vh;

  color: var(--color-text-primary);
  background: var(--color-bg-light);
}


/* =========================================================
   ARTICLE HEADER
========================================================= */

.article-header {
  padding:
    clamp(120px, 4vw, 88px)
    clamp(24px, 5vw, 96px)
    clamp(56px, 5vw, 80px);
}


.article-header__updated {
  margin: 0 0 24px;
  color: var(--color-text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.article-header__inner {
  width: min(100%, 1040px);
  margin-inline: auto;
}


.article-back {

  position: relative;  
  display: inline-flex;
  align-items: center;

  margin-bottom: 40px;

  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;

  color: var(--color-text-secondary);
  text-decoration: none;

  transition:
    color 180ms ease,
    transform 180ms ease;
}

.article-back::after {
  content: "";

  position: absolute;

  left: 0;
  bottom: -5px;

  width: 100%;
  height: 1px;

  background: currentColor;

  transform: scaleX(0);
  transform-origin: left;

  transition: transform 220ms ease;
}

.article-back:hover {
  color: var(--color-text-primary);
  transform: translateX(-4px);
}

.article-back:hover::after {
  transform: scaleX(1);
}

.article-back:hover {
  color: var(--color-text-primary);
  transform: translateX(-4px);
}


/* META */

.article-header__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;

  gap: 10px 20px;

  margin-bottom: 28px;

  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;

  letter-spacing: 0.08em;
  text-transform: uppercase;

  color: var(--color-text-secondary);
}


.article-header__category {
  color: var(--color-accent);
  font-weight: 600;
}


.article-header__meta > *:not(:last-child)::after {
  content: "·";
  margin-left: 20px;

  color: var(--color-border);
}


/* TITLE */

.article-header__title {
  max-width: 920px;

  margin: 0;

  font-family: var(--font-display);
  font-size: clamp(58px, 7vw, 104px);
  font-weight: 600;

  line-height: 0.92;
  letter-spacing: -0.035em;

  color: var(--color-text-primary);
}


/* LEAD */

.article-header__lead {
  max-width: 760px;

  margin: 36px 0 0;

  font-family: var(--font-body);
  font-size: clamp(19px, 1.6vw, 24px);
  font-weight: 400;

  line-height: 1.6;

  color: var(--color-text-secondary);
}


/* AUTHOR */

.article-header__author {
  margin-top: 32px;

  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;

  color: var(--color-text-primary);
}


/* =========================================================
   OPTIONAL COVER
========================================================= */

.article-cover {
  width: min(100% - 48px, 1200px);

  margin:
    0
    auto
    clamp(72px, 8vw, 120px);

  overflow: hidden;

  border-radius: 12px;
}


.article-cover img {
  display: block;

  width: 100%;
  height: auto;

  object-fit: cover;
}


/* =========================================================
   ARTICLE LAYOUT
========================================================= */

.article-layout {
  display: grid;

  grid-template-columns:
    220px
    minmax(0, 760px);

  gap: clamp(48px, 6vw, 96px);

  width: min(100% - 48px, 1120px);

  margin-inline: auto;

  align-items: start;
}


/* =========================================================
   TABLE OF CONTENTS
========================================================= */

.article-toc {
  position: sticky;

  top: 110px;

  align-self: start;
}


.article-toc__nav {
  display: flex;
  flex-direction: column;
  max-height: calc(100dvh - 120px);

  overflow-y: auto;
  overscroll-behavior: contain;

  gap: 6px;

  padding: 18px;

  border: 1px solid var(--color-border);
  border-radius: 12px;

  background: rgba(247, 248, 247, 0.88);

  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  scrollbar-width: thin;
  scrollbar-color: rgba(74, 111, 96, 0.14) transparent;
}

.article-toc__nav::-webkit-scrollbar {
  width: 3px;
}

.article-toc__nav::-webkit-scrollbar-track {
  background: transparent;
}

.article-toc__nav::-webkit-scrollbar-thumb {
  background: rgba(74, 111, 96, 0.14);
  border-radius: 999px;
}


.article-toc__label {
  display: block;

  margin:
    4px
    12px
    8px;

  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;

  letter-spacing: 0.12em;
  text-transform: uppercase;

  color: var(--color-accent);
}


.article-toc__link {
  display: block;

  padding: 10px 12px;

  border-radius: 8px;

  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;

  line-height: 1.4;

  color: var(--color-text-secondary);
  text-decoration: none;

  transition:
    color 180ms ease,
    background-color 180ms ease,
    transform 180ms ease;
}


.article-toc__link:hover {
  color: var(--color-text-primary);

  background: rgba(0, 0, 0, 0.035);

  transform: translateX(3px);
}


.article-toc__link.is-active {
  color: var(--color-text-primary);

  background: rgba(127, 159, 148, 0.14);
}


/* =========================================================
   ARTICLE BODY
========================================================= */
.article-body ol {
  list-style: decimal;
  padding-left: 1.6em;
}

.article-body ul {
  list-style: disc;
  padding-left: 1.6em;
}

.article-body {
  min-width: 0;

  font-family: var(--font-body);
  font-size: 17px;

  line-height: 1.82;

  color: var(--color-text-primary);
}

.article-body table {
  width: 100%;
  margin: 24px 0;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: inherit;
  line-height: 1.65;
}

.article-body th,
.article-body td {
  padding: 12px;
  border: 1px solid var(--color-accent);
  text-align: left;
  vertical-align: top;
  overflow-wrap: anywhere;
}

.article-body th {
  background: var(--color-light-surface);
  font-weight: 700;
}

.article-body th:first-child:nth-last-child(2) {
  width: 60%;
}

.article-body p {
  text-align: justify;
  text-indent: 1.25cm;
}

.article-body__lead,
.article-note p,
.article-quote p,
.article-figure figcaption,
.article-sources li {
  text-indent: 0;
  text-align: left;
}

.article-body ul,
.article-body ol {
  margin: 16px 0 20px;
  padding-left: 1.6em;
}

.article-body li {
  margin-bottom: 0;
}

.article-body li:last-child {
  margin-bottom: 0;
}

.article-body li p {
  text-indent: 0;
  margin: 0;
}

.article-body blockquote {
  margin: 40px 0;

  padding: 22px 28px;

  border-left: 3px solid var(--color-accent);

  background: rgba(127, 159, 148, 0.08);

  font-family: var(--font-display);
  font-size: clamp(18px, 1.4vw, 22px);
  font-weight: 500;

  line-height: 1.4;

  color: var(--color-text-primary);
}

.article-body blockquote p {
  margin: 0;

  text-indent: 0;
  text-align: left;
}

html {
  scroll-padding-top: 110px;
}

.article-body h2[id] {
  scroll-margin-top: 110px;
}


.article-section + .article-section {
  margin-top: 64px;
}


/* FIRST LEAD */

.article-body__lead {
  margin-top: 0;

  font-size: clamp(20px, 1.5vw, 23px);
  line-height: 1.7;

  color: var(--color-text-primary);
}


/* PARAGRAPHS */

.article-body p {
  margin:
    0
    0
    14px;
}

.article-toc__link--sub {
  padding-left: 26px;

  font-size: 12px;

  color: var(--color-text-secondary);

  opacity: 0.85;
}

.article-body p:last-child {
  margin-bottom: 0;
}


/* HEADINGS */

.article-body h2 {
  margin:
    0
    0
    24px;

  font-family: var(--font-body);
  font-size: clamp(28px, 2.7vw, 38px);
  font-weight: 500;

  line-height: 1.15;
  letter-spacing: -0.025em;

  color: var(--color-text-primary);
}


.article-body h3 {
  margin:
    42px
    0
    22px;

  font-family: var(--font-body);
  font-size: clamp(32px, 3vw, 46px);
  font-weight: 600;

  line-height: 1.25;

  color: var(--color-text-primary);
}


/* LINKS */

.article-body a {
  color: var(--color-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}


.article-body a:hover {
  color: var(--color-text-primary);
}


/* LISTS */

.article-body ul,
.article-body ol {
  margin:
    24px
    0
    28px;

  padding-left: 24px;
}


.article-body li + li {
  margin-top: 0;
}


/* =========================================================
   QUOTE
========================================================= */

.article-quote {
  position: relative;

  margin:
    48px
    0;

  padding:
    8px
    0
    8px
    28px;

  border-left: 2px solid var(--color-accent);

  font-family: var(--font-display);
  font-size: clamp(26px, 2.6vw, 36px);
  font-weight: 500;

  line-height: 1.35;

  color: var(--color-text-primary);
}


.article-quote p {
  margin: 0;
}


/* =========================================================
   PRACTICAL NOTE
========================================================= */

.article-note {
  margin:
    42px
    0;

  padding:
    26px
    28px;

  border-left: 3px solid var(--color-accent);
  border-radius: 0 10px 10px 0;

  background: rgba(127, 159, 148, 0.09);
}


.article-note__label {
  display: block;

  margin-bottom: 10px;

  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;

  letter-spacing: 0.12em;
  text-transform: uppercase;

  color: var(--color-accent);
}


.article-note p {
  margin: 0;

  font-size: 15px;
  line-height: 1.7;
}


/* =========================================================
   FIGURES
========================================================= */

.article-figure {
  margin:
    52px
    0;
}


.article-figure img {
  display: block;

  width: 100%;
  height: auto;

  border-radius: 10px;
}


.article-figure figcaption {
  margin-top: 12px;

  font-family: var(--font-body);
  font-size: 12px;

  line-height: 1.5;

  color: var(--color-text-secondary);
}


/* =========================================================
   SOURCES
========================================================= */

.article-sources {
  padding-top: 16px;
}


.article-sources__list {
  margin-top: 24px;
}


.article-sources__list li {
  padding-left: 6px;
}


.article-update {
  display: flex;
  flex-wrap: wrap;

  gap: 12px 28px;

  margin-top: 42px;
  padding-top: 22px;

  border-top: 1px solid var(--color-border);

  font-family: var(--font-body);
  font-size: 12px;

  color: var(--color-text-secondary);
}


/* =========================================================
   DISCUSSION
========================================================= */

.article-discussion {
  margin-top: clamp(88px, 10vw, 140px);

  padding:
    clamp(64px, 7vw, 96px)
    clamp(24px, 5vw, 96px);

  border-top: 1px solid var(--color-border);
}


.article-discussion__inner {
  width: min(100%, 760px);

  margin-inline: auto;
}


.article-discussion__header {
  margin-bottom: 36px;
}


.article-discussion__header h2 {
  margin: 0;

  font-family: var(--font-body);
  font-size: clamp(28px, 2.5vw, 36px);
  font-weight: 500;

  letter-spacing: -0.02em;

  color: var(--color-text-primary);
}


.article-discussion__header p {
  margin:
    12px
    0
    0;

  font-family: var(--font-body);
  font-size: 15px;

  line-height: 1.6;

  color: var(--color-text-secondary);
}


.article-comments {
  min-height: 120px;
}


/* =========================================================
   ARTICLE PAGINATION
========================================================= */

.article-pagination {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));

  width: min(100% - 48px, 1120px);

  margin:
    0
    auto
    clamp(88px, 10vw, 140px);

  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}


.article-pagination__item {
  display: flex;
  flex-direction: column;

  gap: 12px;

  min-height: 170px;

  padding: 32px;

  color: inherit;
  text-decoration: none;

  transition:
    background-color 200ms ease,
    padding-left 200ms ease,
    padding-right 200ms ease;
}

.article-pagination__item[hidden] {
  display: none;
}

.article-pagination:has(
  .article-pagination__item[hidden]
) {
  grid-template-columns: 1fr;
}

.article-pagination__item--next:only-child {
  text-align: right;
  align-items: flex-end;
}

.article-pagination__item + .article-pagination__item {
  border-left: 1px solid var(--color-border);
}


.article-pagination__item:hover {
  background: rgba(0, 0, 0, 0.02);
}


.article-pagination__item--previous:hover {
  padding-left: 26px;
}


.article-pagination__item--next {
  text-align: right;
  align-items: flex-end;
}


.article-pagination__item--next:hover {
  padding-right: 26px;
}


.article-pagination__label {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;

  letter-spacing: 0.1em;
  text-transform: uppercase;

  color: var(--color-accent);
}


.article-pagination__title {
  max-width: 420px;

  font-family: var(--font-body);
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 500;

  line-height: 1.2;

  color: var(--color-text-primary);
}


/* =========================================================
   RESPONSIVE
========================================================= */

@media (max-width: 980px) {

  .article-layout {
    grid-template-columns: 180px minmax(0, 1fr);

    gap: 40px;
  }


  .article-toc__nav {
    padding: 14px;
  }


  .article-toc__link {
    font-size: 12px;
  }

}


@media (max-width: 820px) {

  .article-layout {
    grid-template-columns: 1fr;
  }


  .article-toc {
    position: static;
  }


  .article-toc__nav {
    display: grid;

    grid-template-columns: repeat(2, minmax(0, 1fr));

    gap: 8px;

    margin-bottom: 48px;
  }


  .article-toc__label {
    grid-column: 1 / -1;
  }


  .article-toc__link:hover {
    transform: none;
  }

}

@media (max-width: 768px) {
  .article-toc__nav {
    max-height: none;
    overflow-y: visible;
    overscroll-behavior: auto;

    padding-right: 0;
  }
}


@media (max-width: 640px) {

  .article-header {
    padding:
      110px
      24px
      56px;
  }


  .article-header__title {
    font-size: clamp(48px, 15vw, 72px);
  }


  .article-header__lead {
    margin-top: 28px;

    font-size: 18px;
  }


  .article-header__meta {
    gap: 8px 12px;

    font-size: 10px;
  }


  .article-header__meta > *:not(:last-child)::after {
    margin-left: 12px;
  }


  .article-layout {
    width: min(100% - 32px, 760px);
  }


  .article-toc__nav {
    grid-template-columns: 1fr;
  }


  .article-body {
    font-size: 16px;

    line-height: 1.75;
  }


  .article-section + .article-section {
    margin-top: 52px;
  }


  .article-quote {
    margin-block: 38px;

    padding-left: 20px;
  }


  .article-note {
    padding: 22px;
  }


  .article-discussion {
    margin-top: 72px;

    padding:
      56px
      24px;
  }


  .article-pagination {
    grid-template-columns: 1fr;

    width: min(100% - 32px, 760px);

    margin-bottom: 80px;
  }


  .article-pagination__item + .article-pagination__item {
    border-left: 0;
    border-top: 1px solid var(--color-border);
  }


  .article-pagination__item--next {
    text-align: left;
    align-items: flex-start;
  }

}


/* =========================================================
   REDUCED MOTION
========================================================= */

@media (prefers-reduced-motion: reduce) {

  .article-back,
  .article-toc__link,
  .article-pagination__item {
    transition: none;
  }

}

/* Keep long medical terms inside the article header on narrow screens. */
.article-header__title { overflow-wrap: anywhere; hyphens: manual; }

/* Semantically repaired former H4s keep their original browser typography. */
.article-body h3.seo-heading-sub { font-size: 1em; font-weight: bold; line-height: inherit; margin: 1.33em 0; }
.article-header__author a { color: inherit; text-decoration: none; }
.article-header__author a:hover { text-decoration: underline; }
.article-related { width: min(100% - 48px, 1040px); margin: 24px auto; }
.article-related h2 { font: inherit; font-weight: 600; }
.article-body img { max-width: 100%; height: auto; }
.article-body a { overflow-wrap: anywhere; }