:root {
  --ink: var(--text);
  --ink-soft: var(--muted-strong);
  --ink-muted: var(--muted);
  --ink-subtle: #60717e;
  --accent: var(--cyan);
  --accent-bright: var(--cyan-soft);
  --accent-deep: #28afd4;
  --accent-soft: rgba(70, 217, 255, .075);
  --accent-line: rgba(70, 217, 255, .24);
  --serif: var(--font);
  --sans: var(--font);
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 26px;
}

body {
  background:
    radial-gradient(circle at 50% 7%, rgba(37, 166, 203, .10), transparent 29%),
    var(--bg);
}

body::before {
  opacity: 1;
  mix-blend-mode: normal;
}

main,
nav.top,
footer {
  position: relative;
  z-index: 2;
}

.wrap {
  width: min(calc(100% - 48px), var(--max));
  max-width: none;
  margin-inline: auto;
  padding: 0;
}

.read-progress {
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  box-shadow: 0 0 18px rgba(70, 217, 255, .65);
}

nav.top {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 14px 0 0;
  border: 0;
  background: rgba(5, 8, 12, .97);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

nav.top .wrap {
  min-height: 64px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 18px;
  background: rgba(6, 10, 15, .99);
  box-shadow: 0 18px 55px rgba(0, 0, 0, .30), inset 0 1px rgba(255, 255, 255, .025);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
}

nav.top.scrolled .wrap {
  border-color: rgba(164, 196, 218, .17);
}

.logo {
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.04em;
}

.logo::before {
  width: 31px;
  height: 31px;
  flex-basis: 31px;
  background-image: url("leadhold-mark.svg");
  filter: drop-shadow(0 0 12px rgba(70, 217, 255, .25));
}

.nav-links {
  gap: 23px;
}

.nav-links a {
  color: var(--muted-strong);
  font-size: 12px;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

.nav-links a.active {
  position: relative;
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
}

.nav-cta,
.nav-mobile-cta {
  border-color: transparent;
  background: linear-gradient(135deg, #76e7ff, #37c9ef);
  color: #031017;
  font-family: var(--font);
  font-weight: 700;
  box-shadow: 0 14px 36px rgba(46, 195, 232, .18), inset 0 1px rgba(255, 255, 255, .7);
}

.nav-cta:hover,
.nav-mobile-cta:hover {
  border-color: transparent;
  background: linear-gradient(135deg, #8cecff, #45d2f5);
  color: #031017;
  transform: translateY(-1px);
}

.hc-hero {
  min-height: 570px;
  padding: 112px 0 76px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  text-align: center;
}

.hc-hero::before {
  inset: 0;
  background:
    radial-gradient(circle at 50% 38%, rgba(51, 195, 231, .14), transparent 31%),
    linear-gradient(rgba(255, 255, 255, .022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .022) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  mask-image: linear-gradient(to bottom, #000 15%, rgba(0, 0, 0, .75) 65%, transparent);
}

.hc-hero::after {
  content: "";
  position: absolute;
  top: 12%;
  left: 50%;
  width: 620px;
  height: 220px;
  transform: translateX(-50%);
  border-radius: 50%;
  background: rgba(70, 217, 255, .06);
  filter: blur(85px);
  pointer-events: none;
}

.hc-hero .wrap {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hc-breadcrumb {
  min-height: 29px;
  margin: 0 0 22px;
  padding: 7px 11px;
  border: 1px solid rgba(70, 217, 255, .18);
  border-radius: 999px;
  background: rgba(70, 217, 255, .045);
  color: var(--cyan-soft);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.hc-breadcrumb a,
.hc-breadcrumb .sep {
  display: none;
}

.hc-hero h1 {
  max-width: 900px;
  margin: 0;
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(42px, 5.6vw, 76px);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -.055em;
}

.hc-hero h1 em {
  display: block;
  max-width: 760px;
  margin: 12px auto 0;
  color: var(--cyan-soft);
  font-size: .48em;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -.035em;
}

.hc-hero p.lead {
  max-width: 710px;
  margin: 24px auto 0;
  color: var(--muted-strong);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.7;
}

.hc-search-shell {
  width: min(100%, 720px);
  margin-top: 34px;
}

.hc-search {
  position: relative;
  display: flex;
  align-items: center;
}

.hc-search svg {
  position: absolute;
  left: 19px;
  width: 20px;
  height: 20px;
  color: var(--muted);
  pointer-events: none;
}

.hc-search input {
  width: 100%;
  min-height: 62px;
  padding: 0 58px 0 54px;
  border: 1px solid rgba(164, 196, 218, .19);
  border-radius: 17px;
  outline: none;
  background: rgba(5, 9, 14, .91);
  color: #fff;
  box-shadow: 0 24px 65px rgba(0, 0, 0, .35), inset 0 1px rgba(255, 255, 255, .035);
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.hc-search input::placeholder {
  color: #6f7f8c;
}

.hc-search input:focus {
  border-color: rgba(70, 217, 255, .48);
  background: rgba(7, 13, 20, .98);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .38), 0 0 0 4px rgba(70, 217, 255, .07);
}

.hc-search button {
  position: absolute;
  right: 9px;
  width: 43px;
  height: 43px;
  border: 0;
  border-radius: 11px;
  background: rgba(70, 217, 255, .10);
  color: var(--cyan-soft);
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}

.hc-search button:hover {
  background: rgba(70, 217, 255, .17);
  color: #fff;
}

.hc-popular {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 11px;
}

.hc-popular > span {
  display: inline-flex;
  align-items: center;
  margin-right: 3px;
}

.hc-popular a {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .025);
  color: var(--muted-strong);
  transition: border-color .2s ease, background .2s ease, color .2s ease;
}

.hc-popular a:hover {
  border-color: rgba(70, 217, 255, .28);
  background: rgba(70, 217, 255, .065);
  color: #fff;
}

.hc-search-status {
  min-height: 18px;
  margin: 10px 0 0;
  color: var(--cyan-soft);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .05em;
}

.hc-featured {
  padding: 66px 0 22px;
}

.hc-featured-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.hc-featured-head h2 {
  margin: 9px 0 0;
  font-family: var(--font);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 500;
  line-height: 1.16;
  letter-spacing: -.04em;
}

.hc-featured-head p {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.hc-featured-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.hc-featured-card {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .035), transparent 58%),
    rgba(7, 12, 18, .70);
  box-shadow: inset 0 1px rgba(255, 255, 255, .025);
  transition: transform .24s ease, border-color .24s ease, background .24s ease;
}

.hc-featured-card:hover {
  transform: translateY(-4px);
  border-color: rgba(70, 217, 255, .28);
  background:
    linear-gradient(145deg, rgba(70, 217, 255, .07), transparent 58%),
    rgba(8, 14, 21, .90);
}

.hc-featured-icon {
  width: 43px;
  height: 43px;
  display: grid;
  place-items: center;
  margin-bottom: 28px;
  border: 1px solid rgba(70, 217, 255, .20);
  border-radius: 13px;
  background: rgba(70, 217, 255, .055);
  color: var(--cyan);
}

.hc-featured-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hc-featured-card strong {
  color: var(--text);
  font-size: 16px;
  font-weight: 650;
}

.hc-featured-card small {
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.hc-featured-card::after {
  content: "→";
  align-self: flex-end;
  margin-top: auto;
  color: #627582;
  transition: transform .2s ease, color .2s ease;
}

.hc-featured-card:hover::after {
  transform: translateX(3px);
  color: var(--cyan);
}

.hc-library {
  scroll-margin-top: 90px;
  padding: 88px 0 48px;
}

.hc-library-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 28px;
}

.hc-library-head .eyebrow {
  color: var(--cyan-soft);
  font-size: 9px;
}

.hc-library-head .eyebrow::before {
  display: none;
}

.hc-library-head h2 {
  margin-top: 11px;
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(30px, 3.6vw, 48px);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -.045em;
}

.hc-library-head > p {
  max-width: 430px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.hc-library-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 72px 80px;
}

.hc-library-card {
  scroll-margin-top: 110px;
  min-width: 0;
}

.hc-library-card h3 {
  margin: 0;
  padding-bottom: 13px;
  border-bottom: 1px solid rgba(164, 196, 218, .22);
  color: var(--text);
  font-family: var(--font);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.035em;
}

.hc-library-card h3 span {
  color: var(--cyan-soft);
}

.hc-library-list {
  display: grid;
  gap: 2px;
  margin: 11px 0 0;
  padding: 0;
  list-style: none;
}

.hc-library-list a {
  min-height: 46px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 1px;
  color: #dce8ee;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -.015em;
  transition: color .2s ease, transform .2s ease;
}

.hc-library-link-icon {
  position: relative;
  width: 22px;
  height: 22px;
  flex: 0 0 22px;
  display: grid;
  place-items: center;
  color: #e8f3f7;
  transition: color .2s ease, border-color .2s ease, transform .2s ease;
}

.hc-library-link-icon--guide {
  border: 1.5px solid currentColor;
  border-radius: 50%;
}

.hc-library-link-icon--guide::after {
  content: "";
  width: 0;
  height: 0;
  margin-left: 2px;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid currentColor;
}

.hc-library-link-icon--research::before {
  content: "✦";
  font-size: 23px;
  line-height: 1;
}

.hc-library-link-icon--agent::before,
.hc-library-link-icon--agent::after {
  content: "";
  position: absolute;
  width: 11px;
  height: 6px;
  border: 1.5px solid currentColor;
  border-radius: 999px;
  transform: rotate(-45deg);
}

.hc-library-link-icon--agent::before {
  top: 3px;
  right: 1px;
}

.hc-library-link-icon--agent::after {
  bottom: 3px;
  left: 1px;
}

.hc-library-list a:hover {
  color: #fff;
  transform: translateX(4px);
}

.hc-library-list a:hover .hc-library-link-icon {
  color: var(--cyan);
}

.hc-layout {
  display: none;
  grid-template-columns: minmax(0, 900px);
  justify-content: center;
  scroll-margin-top: 100px;
  padding-top: 32px;
  padding-bottom: 100px;
}

.hc-layout.is-active {
  display: grid;
}

.hc-layout.is-active .hc-cat {
  display: none;
}

.hc-layout.is-active .hc-cat.is-reader-section {
  display: block;
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.hc-layout.is-active .hc-cat-head {
  display: none;
}

.hc-layout.is-active .hc-cat.is-reader-section details.article {
  display: none;
}

.hc-layout.is-active .hc-cat.is-reader-section details.article.is-reader-article {
  display: block;
}

.hc-reader-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
  color: #607582;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.hc-reader-toolbar a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid rgba(164, 196, 218, .13);
  border-radius: 10px;
  background: rgba(255, 255, 255, .025);
  color: var(--muted-strong);
  font-family: var(--font);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}

.hc-reader-toolbar a:hover {
  border-color: rgba(70, 217, 255, .25);
  background: rgba(70, 217, 255, .055);
  color: #fff;
}

.hc-toc {
  top: 108px;
  height: fit-content;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: rgba(7, 12, 18, .68);
  box-shadow: inset 0 1px rgba(255, 255, 255, .02);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.hc-toc::after {
  content: "27 материалов";
  display: block;
  margin: 16px 7px 2px;
  color: #5f717f;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.hc-toc-title {
  padding: 0 8px 13px;
  color: #6d7f8c;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: .12em;
}

.hc-toc-list {
  gap: 3px;
  border-top: 1px solid rgba(255, 255, 255, .055);
  padding-top: 9px;
}

.hc-toc-list a {
  gap: 10px;
  padding: 10px 8px;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
}

.hc-toc-list a:hover,
.hc-toc-list a.active {
  border-color: rgba(70, 217, 255, .12);
  background: rgba(70, 217, 255, .05);
  color: #fff;
}

.hc-toc-list a.active {
  box-shadow: inset 2px 0 var(--cyan);
}

.hc-toc-list .num {
  color: #607380;
  font-size: 8px;
}

.hc-main {
  min-width: 0;
}

.hc-cat {
  scroll-margin-top: 118px;
  padding-top: 0;
}

.hc-cat:not(:first-child) {
  margin-top: 86px;
  padding-top: 76px;
  border-top-color: rgba(164, 196, 218, .10);
}

.hc-cat-head {
  margin-bottom: 25px;
}

.hc-cat-head .eyebrow,
.hc-featured .eyebrow {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  color: var(--cyan-soft);
  font-size: 9px;
}

.hc-cat-head .eyebrow::before,
.hc-featured .eyebrow::before {
  display: none;
}

.hc-cat-head h2 {
  max-width: 780px;
  margin: 12px 0 13px;
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(29px, 3.7vw, 48px);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -.045em;
}

.hc-cat-head h2 em {
  color: var(--muted-strong);
  font-weight: 500;
}

.hc-cat-head p {
  max-width: 720px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.7;
}

details.article {
  margin-bottom: 10px;
  border-color: rgba(164, 196, 218, .12);
  border-radius: 16px;
  background: rgba(8, 14, 21, .76);
  box-shadow: inset 0 1px rgba(255, 255, 255, .02);
}

details.article:hover {
  border-color: rgba(164, 196, 218, .24);
  background: rgba(10, 17, 25, .88);
}

details.article[open] {
  border-color: rgba(70, 217, 255, .25);
  background: rgba(9, 17, 25, .94);
}

details.article summary {
  min-height: 68px;
  align-items: center;
  padding: 18px 20px;
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  font-weight: 600;
}

details.article summary:hover {
  color: var(--cyan-soft);
}

details.article .article-body {
  padding: 2px 20px 24px;
  color: var(--muted-strong);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.75;
}

.article-body p,
.article-body ul,
.article-body ol {
  color: var(--muted-strong);
}

.article-body strong,
.article-body h4 {
  color: var(--text);
}

.article-body h4 {
  font-family: var(--font);
  font-size: 15px;
  font-weight: 650;
}

.article-body a {
  color: var(--cyan-soft);
  border-bottom-color: rgba(70, 217, 255, .25);
}

.article-figure {
  width: fit-content;
  max-width: 100%;
  margin-top: 18px;
}

.article-figure--telegram-discussion {
  width: min(100%, 280px);
}

.article-figure img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(164, 196, 218, .18);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(0, 0, 0, .24);
}

.article-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.callout {
  border-radius: 12px;
  background: rgba(255, 255, 255, .025);
}

.hc-empty {
  min-height: 260px;
  display: grid;
  place-items: center;
  padding: 45px;
  border: 1px dashed rgba(164, 196, 218, .20);
  border-radius: 22px;
  text-align: center;
}

.hc-empty strong {
  display: block;
  font-size: 21px;
}

.hc-empty p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.hc-support {
  position: relative;
  margin-top: 36px;
  padding: 24px;
  gap: 14px;
  border-color: rgba(70, 217, 255, .18);
  border-radius: 20px;
  background:
    radial-gradient(circle at 90% 0, rgba(70, 217, 255, .12), transparent 36%),
    linear-gradient(145deg, rgba(13, 24, 35, .97), rgba(7, 12, 18, .94));
  box-shadow: 0 34px 80px rgba(0, 0, 0, .24), inset 0 1px rgba(255, 255, 255, .035);
}

.hc-support::before {
  background: var(--cyan);
  box-shadow: 0 0 22px var(--cyan);
}

.hc-support h3 {
  color: var(--text);
  font-family: var(--font);
  font-size: 27px;
  font-weight: 550;
  letter-spacing: -.035em;
}

.hc-support p {
  color: var(--muted);
  font-weight: 400;
}

.btn-primary {
  min-height: 39px;
  justify-content: center;
  padding: 0 17px;
  border: 1px solid #419fd9;
  border-radius: 10px;
  background: #419fd9;
  color: #000;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .24), inset 0 1px rgba(255, 255, 255, .18);
}

.btn-primary:hover {
  --lift: -2px;
  background: #378fc5;
  color: #000;
  box-shadow: 0 18px 42px rgba(0, 0, 0, .3), 0 0 24px rgba(65, 159, 217, .2);
}

.btn-primary:focus-visible {
  outline: 2px solid #419fd9;
  outline-offset: 3px;
}

.btn-ghost {
  min-height: 39px;
  justify-content: center;
  padding: 0 17px;
  border: 1px solid rgba(255, 255, 255, .82);
  border-radius: 10px;
  background: #fff;
  color: #071017;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .24), inset 0 1px rgba(255, 255, 255, .9);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, .82);
  background: #eefbff;
  color: #071017;
  box-shadow: 0 18px 42px rgba(0, 0, 0, .3), 0 0 24px rgba(156, 236, 255, .14);
  transform: translateY(-2px);
}

.btn-ghost:focus-visible {
  outline: 2px solid #46d9ff;
  outline-offset: 3px;
}

footer {
  padding: 66px 0 28px;
  border-top-color: var(--line);
  background: #04070a;
}

.foot-grid {
  gap: 68px;
}

.foot-brand p,
.foot-col a,
.foot-bottom {
  color: var(--muted);
  font-size: 11px;
}

.foot-col h5 {
  color: #71828e;
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: .1em;
}

.foot-col a:hover {
  color: #fff;
}

.foot-bottom {
  border-top-color: rgba(255, 255, 255, .06);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 1080px) {
  .nav-links {
    gap: 15px;
  }

  .nav-links a {
    font-size: 11px;
  }

  .hc-featured-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hc-library-grid {
    gap: 58px 48px;
  }
}

@media (max-width: 899px) {
  .hc-layout {
    grid-template-columns: 1fr;
    padding-top: 48px;
  }

  .hc-toc {
    display: none;
  }
}

@media (max-width: 767px) {
  .wrap {
    width: min(calc(100% - 32px), var(--max));
  }

  nav.top {
    padding-top: 8px;
  }

  nav.top .wrap {
    min-height: 58px;
    padding: 0 12px;
    border-radius: 15px;
  }

  .nav-burger {
    width: 40px;
    height: 40px;
    display: flex;
  }

  .nav-mobile-overlay {
    top: 0;
    padding-top: 82px;
    background: rgba(5, 8, 12, .98);
  }

  .nav-mobile-overlay::before {
    display: none;
  }

  .nav-mobile-links a {
    color: var(--muted-strong);
    font-family: var(--font);
    font-size: 17px;
  }

  .hc-hero {
    min-height: 540px;
    padding: 90px 0 58px;
  }

  .hc-hero h1 {
    font-size: clamp(39px, 13vw, 58px);
  }

  .hc-hero h1 em {
    margin-top: 14px;
    font-size: .43em;
  }

  .hc-hero p.lead {
    font-size: 14px;
  }

  .hc-search input {
    min-height: 58px;
    font-size: 14px;
  }

  .hc-popular > span {
    width: 100%;
    justify-content: center;
  }

  .hc-featured {
    padding-top: 49px;
  }

  .hc-featured-head {
    display: block;
  }

  .hc-featured-head p {
    margin-top: 12px;
  }

  .hc-featured-grid {
    grid-template-columns: 1fr;
  }

  .hc-featured-card {
    min-height: 160px;
  }

  .hc-featured-icon {
    margin-bottom: 18px;
  }

  .hc-library {
    padding-top: 66px;
  }

  .hc-library-head {
    display: block;
  }

  .hc-library-head > p {
    margin-top: 12px;
  }

  .hc-library-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hc-library-card {
    padding: 0;
  }

  .hc-library-list a {
    font-size: 13.5px;
  }

  .hc-layout {
    padding-bottom: 72px;
  }

  .hc-cat:not(:first-child) {
    margin-top: 60px;
    padding-top: 56px;
  }

  details.article summary {
    min-height: 64px;
    padding: 16px;
    font-size: 14px;
  }

  details.article .article-body {
    padding: 0 16px 20px;
  }

  .hc-support {
    margin-top: 28px;
    padding: 20px 16px;
  }

  .foot-links {
    gap: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hc-featured-card,
  .hc-featured-card::after,
  .nav-cta,
  .nav-mobile-cta {
    transition: none;
  }
}

[hidden] {
  display: none !important;
}

.hc-library-card > p {
  max-width: 520px;
  margin: 10px 0 13px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.hc-library-link-copy {
  min-width: 0;
  display: grid;
  gap: 4px;
}

.hc-library-link-copy strong {
  color: inherit;
  font-size: 14px;
  font-weight: 600;
}

.hc-library-link-copy small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
  line-height: 1.45;
}

.hc-library-list a:hover .hc-library-link-copy small {
  color: var(--muted-strong);
}

.hc-library-list a {
  align-items: flex-start;
  padding-block: 11px;
}

.hc-library-link-icon {
  margin-top: 1px;
}

.hc-support-wrap {
  padding: 18px 0 100px;
}

.hc-support-wrap .hc-support {
  margin-top: 0;
}

.hc-support h2 {
  color: var(--text);
  font-family: var(--font);
  font-size: 27px;
  font-weight: 550;
  letter-spacing: -.035em;
}

.hc-article-hero {
  position: relative;
  padding: 88px 0 0;
  text-align: center;
  overflow: hidden;
}

.hc-article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 25%, rgba(51, 195, 231, .13), transparent 60%),
    linear-gradient(rgba(255, 255, 255, .018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .018) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  mask-image: linear-gradient(to bottom, #000 20%, transparent 100%);
  pointer-events: none;
}

.hc-article-hero .wrap {
  position: relative;
}

.hc-article-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-bottom: 31px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.hc-article-breadcrumb a {
  color: var(--cyan-soft);
}

.hc-article-breadcrumb a:hover {
  color: #fff;
}

.hc-article-hero .eyebrow {
  color: var(--cyan-soft);
  font-size: 9px;
}

.hc-article-hero h1 {
  max-width: 960px;
  margin: 16px auto 0;
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(38px, 5vw, 68px);
  font-weight: 520;
  line-height: 1.06;
  letter-spacing: -.052em;
}

.hc-article-description {
  max-width: 700px;
  margin: 24px auto 0;
  color: var(--muted-strong);
  font-size: 16px;
  line-height: 1.7;
}

.hc-article-shell {
  max-width: 780px;
  padding-top: 64px;
  padding-bottom: 72px;
}

.hc-article {
  min-width: 0;
  overflow-wrap: anywhere;
}

.hc-article .article-body {
  color: var(--muted-strong);
  font-size: 17px;
  line-height: 1.8;
}

.hc-article .article-body > * + * {
  margin-top: 18px;
}

.hc-article .article-body h2 {
  margin-top: 38px;
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(21px, 2.5vw, 28px);
  font-weight: 620;
  line-height: 1.25;
  letter-spacing: -.03em;
}

.hc-article .article-body h2:first-child {
  margin-top: 0;
}

.hc-related {
  padding: 56px 0 64px;
  border-top: 1px solid var(--line);
}

.hc-related-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.hc-related h2 {
  margin: 0;
  color: var(--text);
  font-family: var(--font);
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 600;
  letter-spacing: -.035em;
}

.hc-related-head p {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.hc-related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hc-related-list li {
  min-width: 0;
}

.hc-related-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(8, 14, 21, .76);
  transition: border-color .2s, background .2s;
}

.hc-related-category {
  color: var(--cyan-soft);
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.5;
}

.hc-related-card h3 {
  margin-top: 18px;
  color: var(--text);
  font-family: var(--font);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -.025em;
}

.hc-related-card p {
  margin: 12px 0 24px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.hc-related-action {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: auto;
  color: var(--cyan-soft);
  font-size: 12px;
  font-weight: 600;
}

.hc-related-card:hover,
.hc-related-card:focus-visible {
  border-color: var(--accent-line);
  background: rgba(13, 28, 38, .9);
}

.hc-related-card:focus-visible,
.hc-related-all:focus-visible {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 4px;
}

.hc-related-all {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 12px;
  color: var(--cyan-soft);
  font-size: 13px;
  font-weight: 600;
}

.hc-related-all:hover {
  color: #fff;
}

@media (max-width: 1100px) {
  .hc-related-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 767px) {
  .hc-library-link-copy strong {
    font-size: 13.5px;
  }

  .hc-article-hero {
    padding: 64px 0 0;
  }

  .hc-article-breadcrumb {
    margin-bottom: 24px;
  }

  .hc-article-hero h1 {
    font-size: clamp(35px, 11vw, 50px);
  }

  .hc-article-description {
    font-size: 14px;
  }

  .hc-article-shell {
    padding-top: 40px;
    padding-bottom: 48px;
  }

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

  .hc-related {
    padding: 40px 0 48px;
  }

  .hc-related-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .hc-support-wrap {
    padding-bottom: 72px;
  }
}

@media (max-width: 640px) {
  .hc-related-list {
    grid-template-columns: 1fr;
  }

  .hc-related-card {
    padding: 24px;
  }
}