/* Nyxelium Guides — long-form editorial layer on the Systema design language. */

.guide-page {
  background:
    linear-gradient(rgba(16, 19, 24, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 19, 24, 0.028) 1px, transparent 1px),
    var(--bg);
  background-size: 56px 56px;
}

.guide-page .site-header {
  grid-template-columns: 1.2fr 1.4fr 1fr 0.9fr;
}

.guide-page .header-back {
  font: 500 12px 'JetBrains Mono', monospace;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.guide-hero {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 0.8fr);
  border-bottom: 1px solid var(--ink);
}

.guide-hero-copy {
  padding: 88px 56px 72px;
  border-right: 1px solid var(--ink);
  background: rgba(241, 242, 244, 0.86);
}

.guide-kicker,
.guide-meta,
.guide-label {
  font: 500 11px 'JetBrains Mono', monospace;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.guide-kicker {
  color: var(--accent);
  margin-bottom: 26px;
}

.guide-title {
  max-width: 14ch;
  font-size: clamp(52px, 6.5vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.045em;
  margin-bottom: 30px;
}

.guide-deck {
  max-width: 60ch;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.65;
}

.guide-hero-aside {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--panel-muted);
}

.guide-product {
  padding: 44px 38px 34px;
  display: grid;
  gap: 24px;
  border-bottom: 1px solid var(--ink);
}

.guide-product img {
  width: 104px;
  height: 104px;
  border-radius: 24px;
  border: 1px solid var(--hairline);
}

.guide-product strong {
  display: block;
  font-size: 26px;
  letter-spacing: -0.02em;
  margin: 8px 0 9px;
}

.guide-product p {
  color: var(--muted);
  line-height: 1.55;
  font-size: 14px;
}

.guide-facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.guide-facts li {
  padding: 18px 38px;
  border-bottom: 1px solid var(--hairline);
  font: 500 12px 'JetBrains Mono', monospace;
}

.guide-facts li:last-child { border-bottom: none; }

.article-shell {
  display: grid;
  grid-template-columns: minmax(230px, 0.7fr) minmax(0, 2fr);
  border-bottom: 1px solid var(--ink);
}

.article-rail {
  padding: 52px 38px;
  border-right: 1px solid var(--ink);
  background: rgba(233, 235, 238, 0.82);
}

.article-rail-inner {
  position: sticky;
  top: 106px;
}

.article-rail .guide-label {
  color: var(--accent);
  margin-bottom: 20px;
}

.article-rail nav {
  display: grid;
  gap: 12px;
}

.article-rail a {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.35;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.article-rail a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.article-body {
  background: var(--bg);
  padding: 72px clamp(40px, 7vw, 112px) 84px;
}

.article-section {
  max-width: 780px;
  scroll-margin-top: 110px;
}

.article-section + .article-section {
  margin-top: 72px;
  padding-top: 72px;
  border-top: 1px solid var(--hairline);
}

.article-section .guide-label {
  color: var(--accent);
  margin-bottom: 18px;
}

.article-section h2 {
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin-bottom: 24px;
}

.article-section h3 {
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.018em;
  margin: 34px 0 12px;
}

.article-section p,
.article-section li {
  color: #414853;
  font-size: 17px;
  line-height: 1.75;
}

.article-section p + p { margin-top: 20px; }

.article-section ul,
.article-section ol {
  margin: 24px 0 0;
  padding-left: 24px;
}

.article-section li + li { margin-top: 14px; }

.article-section strong { color: var(--ink); }

.step-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  background: var(--ink);
  border: 1px solid var(--ink);
}

.step {
  padding: 28px;
  background: var(--bg);
}

.step-num {
  display: block;
  color: var(--accent);
  font: 500 11px 'JetBrains Mono', monospace;
  margin-bottom: 14px;
}

.step strong {
  display: block;
  font-size: 18px;
  margin-bottom: 8px;
}

.step p {
  font-size: 14.5px;
  line-height: 1.6;
}

.note {
  margin-top: 30px;
  padding: 24px 28px;
  border-left: 4px solid var(--accent);
  background: var(--white);
}

.note p {
  font-size: 15px;
  line-height: 1.65;
}

.quick-answers {
  display: grid;
  margin-top: 30px;
  border-top: 1px solid var(--ink);
}

.quick-answer {
  display: grid;
  grid-template-columns: minmax(190px, 0.8fr) 1.4fr;
  gap: 28px;
  padding: 24px 0;
  border-bottom: 1px solid var(--hairline);
}

.quick-answer strong { font-size: 16px; }
.quick-answer p { font-size: 15px; line-height: 1.6; }

.product-callout {
  max-width: 900px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
  align-items: center;
  margin-top: 72px;
  padding: 34px;
  color: var(--white);
  background: var(--ink);
}

.product-callout img {
  width: 78px;
  height: 78px;
  border-radius: 18px;
}

.product-callout .guide-label { color: var(--accent-light); }
.product-callout strong {
  display: block;
  font-size: 24px;
  line-height: 1.2;
  margin: 7px 0;
}
.product-callout p {
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  line-height: 1.5;
}

.related-guides {
  max-width: 900px;
  margin-top: 72px;
  padding-top: 34px;
  border-top: 1px solid var(--ink);
}

.related-guides > .guide-label { color: var(--accent); }

.related-guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 18px;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.related-guide-grid a {
  min-height: 132px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
  background: var(--bg);
  transition: background 0.2s var(--ease);
}

.related-guide-grid a:hover { background: var(--white); }

.related-guide-grid strong {
  font-size: 15px;
  line-height: 1.35;
}

.related-guide-grid span {
  color: var(--accent);
  font-size: 22px;
}

.guide-footer {
  background: var(--ink);
  color: var(--bg);
}

.guide-footer .footer-bottom { border-top: none; }

/* Guide index */
.guide-index-hero {
  padding: 96px 56px 78px;
  border-bottom: 1px solid var(--ink);
  background: rgba(241, 242, 244, 0.88);
}

.guide-index-hero h1 {
  max-width: 12ch;
  font-size: clamp(62px, 8vw, 116px);
  line-height: 0.92;
  letter-spacing: -0.05em;
}

.guide-index-hero .guide-deck { margin-top: 32px; }

.guide-clusters {
  border-bottom: 1px solid var(--ink);
}

.guide-cluster + .guide-cluster {
  border-top: 1px solid var(--ink);
}

.guide-cluster-head {
  display: grid;
  grid-template-columns: 0.7fr 1.35fr 1fr;
  gap: 48px;
  align-items: end;
  padding: 48px 56px;
  background: var(--panel-muted);
  border-bottom: 1px solid var(--ink);
}

.guide-cluster-head .guide-kicker { margin: 0; }

.guide-cluster-head h2 {
  max-width: 16ch;
  font-size: clamp(30px, 3vw, 48px);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

.guide-cluster-head > p:last-child {
  max-width: 48ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.guide-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--ink);
}

.guide-cluster .guide-card-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: none;
}

.guide-card {
  min-height: 480px;
  padding: 42px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--ink);
  transition: background 0.2s var(--ease);
}

.guide-card:last-child { border-right: none; }
.guide-card:hover { background: var(--white); }

.guide-card-icon {
  width: 76px;
  height: 76px;
  border-radius: 18px;
  margin-bottom: 72px;
}

.guide-card h2,
.guide-card h3 {
  max-width: 12ch;
  font-size: 34px;
  line-height: 1.05;
  letter-spacing: -0.035em;
  margin: 18px 0;
}

.guide-cluster .guide-card h3 { font-size: clamp(26px, 2.25vw, 34px); }

.guide-card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.guide-card .guide-card-arrow {
  color: var(--accent);
  font-size: 28px;
  margin-top: auto;
  padding-top: 32px;
}

.guide-method {
  display: grid;
  grid-template-columns: 1fr 2fr;
  border-bottom: 1px solid var(--ink);
}

.guide-method > div { padding: 68px 56px; }
.guide-method > div:first-child { border-right: 1px solid var(--ink); }
.guide-method p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}
.guide-method p + p { margin-top: 18px; }

@media (max-width: 1024px) {
  .guide-page .site-header { grid-template-columns: 1fr auto; }
  .guide-page .header-back, .guide-page .header-nav { display: none; }
  .guide-hero { grid-template-columns: 1fr; }
  .guide-hero-copy { border-right: none; }
  .guide-hero-aside { display: grid; grid-template-columns: 1fr 1fr; }
  .guide-product { border-right: 1px solid var(--ink); border-bottom: none; }
  .article-shell { grid-template-columns: 1fr; }
  .article-rail { display: none; }
  .guide-card-grid { grid-template-columns: 1fr; }
  .guide-cluster .guide-card-grid { grid-template-columns: 1fr; }
  .guide-cluster-head { grid-template-columns: 1fr; gap: 20px; }
  .guide-card {
    min-height: 0;
    border-right: none;
    border-bottom: 1px solid var(--ink);
  }
  .guide-card:last-child { border-bottom: none; }
  .guide-card-icon { margin-bottom: 32px; }
  .guide-method { grid-template-columns: 1fr; }
  .guide-method > div:first-child { border-right: none; border-bottom: 1px solid var(--ink); }
}

@media (max-width: 620px) {
  .guide-hero-copy, .guide-index-hero { padding: 56px 24px 48px; }
  .guide-title { font-size: 48px; }
  .guide-deck { font-size: 17px; }
  .guide-hero-aside { grid-template-columns: 1fr; }
  .guide-product { border-right: none; border-bottom: 1px solid var(--ink); padding: 34px 24px; }
  .guide-facts li { padding: 16px 24px; }
  .article-body { padding: 50px 24px 64px; }
  .article-section + .article-section { margin-top: 52px; padding-top: 52px; }
  .step-grid { grid-template-columns: 1fr; }
  .quick-answer { grid-template-columns: 1fr; gap: 8px; }
  .related-guide-grid { grid-template-columns: 1fr; }
  .related-guide-grid a { min-height: 0; }
  .product-callout {
    grid-template-columns: auto 1fr;
    padding: 26px 24px;
  }
  .product-callout .btn { grid-column: 1 / -1; justify-content: center; }
  .guide-card { padding: 34px 24px; }
  .guide-cluster-head { padding: 40px 24px; }
  .guide-method > div { padding: 48px 24px; }
}