:root {
  --resource-paper: #fffefa;
  --resource-soft: #efede6;
  --resource-cyan: #1ca7c4;
  --resource-orange: #f56b1f;
  --resource-navy: #151d31;
  --resource-ink: #172036;
  --resource-muted: #626b7d;
  --resource-line: rgba(23, 32, 54, 0.13);
}

.resource-hero {
  position: relative;
  overflow: hidden;
  padding: 142px 0 88px;
  border-bottom: 1px solid var(--resource-line);
  background:
    linear-gradient(rgba(23, 32, 54, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 32, 54, 0.035) 1px, transparent 1px),
    linear-gradient(120deg, #faf9f5, #f2f0e9 58%, #edf5f5);
  background-size: 44px 44px, 44px 44px, auto;
}

.resource-hero::after {
  position: absolute;
  top: -220px;
  right: -170px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: rgba(28, 167, 196, 0.12);
  filter: blur(70px);
  content: "";
  pointer-events: none;
}

.resource-hero .shell { position: relative; z-index: 1; }
.resource-kicker,
.article-kicker {
  margin: 0 0 19px;
  color: #a6481c;
  font: 700 10px/1.4 "JetBrains Mono", monospace;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.resource-hero h1,
.article-hero h1 {
  max-width: 930px;
  margin: 0;
  color: var(--resource-ink);
  font-size: clamp(50px, 6vw, 82px);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.resource-hero h1 span,
.article-hero h1 span { color: #737c8d; }
.resource-lede,
.article-lede {
  max-width: 720px;
  margin: 28px 0 0;
  color: #505a6d;
  font-size: 18px;
  line-height: 1.75;
}

.resource-actions { display: flex; gap: 15px; margin-top: 32px; }
.library-section { padding: 92px 0; }
.library-section + .library-section { border-top: 1px solid var(--resource-line); }
.library-heading { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 58px; align-items: end; margin-bottom: 42px; }
.library-heading h2 { margin: 0; font-size: clamp(39px, 4vw, 58px); line-height: 1; letter-spacing: -0.05em; }
.library-heading p { max-width: 580px; margin: 0; color: var(--resource-muted); line-height: 1.75; }

.featured-guide {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  overflow: hidden;
  border: 1px solid var(--resource-line);
  border-radius: 14px;
  background: var(--resource-navy);
  box-shadow: 0 28px 70px rgba(21, 29, 49, 0.16);
  color: #fff;
}
.featured-copy { padding: clamp(32px, 5vw, 64px); }
.featured-copy small,
.guide-card small { color: #f4a274; font: 700 9px "JetBrains Mono", monospace; letter-spacing: 0.13em; text-transform: uppercase; }
.featured-copy h2 { max-width: 640px; margin: 17px 0; font-size: clamp(34px, 4vw, 56px); line-height: 1.02; letter-spacing: -0.05em; }
.featured-copy p { max-width: 630px; color: #b9c1cf; line-height: 1.8; }
.featured-copy a { display: inline-block; margin-top: 21px; padding-bottom: 3px; border-bottom: 1px solid rgba(245, 107, 31, 0.55); color: #ff9b63; font-size: 13px; font-weight: 700; }
.featured-map { display: grid; align-content: center; gap: 0; padding: 42px; background: linear-gradient(145deg, #111a2d, #0b1221); }
.featured-map div { position: relative; padding: 18px 18px 18px 48px; border-left: 1px solid rgba(255, 255, 255, 0.12); color: #cbd2dd; font-size: 12px; }
.featured-map div::before { position: absolute; left: -6px; top: 24px; width: 11px; height: 11px; border-radius: 50%; background: var(--resource-orange); box-shadow: 0 0 0 5px rgba(245, 107, 31, 0.12); content: ""; }
.featured-map b { display: block; margin-bottom: 3px; color: #fff; font-size: 13px; }

.guide-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.guide-card { display: flex; min-height: 305px; flex-direction: column; padding: 29px; border: 1px solid var(--resource-line); border-radius: 10px; background: var(--resource-paper); box-shadow: 0 16px 40px rgba(21, 29, 49, 0.05); transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease; }
.guide-card:hover { transform: translateY(-4px); border-color: rgba(245, 107, 31, 0.35); box-shadow: 0 22px 50px rgba(21, 29, 49, 0.1); }
.guide-card h3 { margin: 17px 0 13px; font-size: 23px; line-height: 1.15; letter-spacing: -0.035em; }
.guide-card p { margin: 0; color: var(--resource-muted); font-size: 13px; line-height: 1.75; }
.guide-card strong { margin-top: auto; padding-top: 26px; color: #a6481c; font-size: 12px; }

.article-hero { padding: 126px 0 70px; border-bottom: 1px solid var(--resource-line); background: linear-gradient(120deg, #faf9f5, #f1efe8); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 26px; color: #7b8495; font-size: 11px; }
.breadcrumbs a { color: #9c4b23; font-weight: 700; }
.article-hero h1 { max-width: 980px; font-size: clamp(45px, 5.3vw, 72px); }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 22px; align-items: center; margin-top: 29px; color: #6f7889; font: 600 10px "JetBrains Mono", monospace; }
.article-meta a { color: #9c4b23; }

.article-wrap { display: grid; grid-template-columns: minmax(0, 760px) 280px; gap: 74px; padding-top: 72px; padding-bottom: 92px; }
.article-body { min-width: 0; }
.article-body h2 { margin: 54px 0 18px; color: var(--resource-ink); font-size: clamp(29px, 3vw, 41px); line-height: 1.08; letter-spacing: -0.045em; }
.article-body h3 { margin: 34px 0 12px; font-size: 21px; line-height: 1.22; letter-spacing: -0.025em; }
.article-body p,
.article-body li { color: #485266; font-size: 16px; line-height: 1.85; }
.article-body p { margin: 0 0 21px; }
.article-body ul,
.article-body ol { margin: 4px 0 26px; padding-left: 24px; }
.article-body li + li { margin-top: 10px; }
.article-body a { color: #9f451a; font-weight: 700; text-decoration: underline; text-decoration-color: rgba(159, 69, 26, 0.28); text-underline-offset: 3px; }
.article-body strong { color: var(--resource-ink); }
.article-definition { margin: 31px 0; padding: 25px 28px; border-left: 3px solid var(--resource-cyan); background: #edf5f5; }
.article-definition b { display: block; margin-bottom: 8px; color: #167f96; font: 700 9px "JetBrains Mono", monospace; letter-spacing: 0.13em; text-transform: uppercase; }
.operator-note { margin: 34px 0; padding: 27px; border: 1px solid rgba(245, 107, 31, 0.25); border-radius: 8px; background: #fff7f0; }
.operator-note b { display: block; margin-bottom: 8px; color: #a6481c; font: 700 10px "JetBrains Mono", monospace; letter-spacing: 0.12em; text-transform: uppercase; }
.process-table { width: 100%; margin: 30px 0; border-collapse: collapse; border: 1px solid var(--resource-line); background: #fff; }
.process-table th,
.process-table td { padding: 15px; border-bottom: 1px solid var(--resource-line); text-align: left; vertical-align: top; }
.process-table th { background: #eceae3; color: #6b7383; font: 700 9px "JetBrains Mono", monospace; letter-spacing: 0.08em; text-transform: uppercase; }
.process-table td { color: #4d5668; font-size: 13px; line-height: 1.65; }
.source-list { margin-top: 52px; padding-top: 30px; border-top: 1px solid var(--resource-line); }
.source-list h2 { margin-top: 0; font-size: 28px; }
.source-list li { font-size: 13px; }

.article-rail { align-self: start; position: sticky; top: 100px; }
.rail-card { padding: 24px; border: 1px solid var(--resource-line); border-radius: 9px; background: #fff; }
.rail-card + .rail-card { margin-top: 14px; }
.rail-card small { color: #a6481c; font: 700 8px "JetBrains Mono", monospace; letter-spacing: 0.12em; text-transform: uppercase; }
.rail-card h3 { margin: 12px 0 9px; font-size: 20px; line-height: 1.15; }
.rail-card p { margin: 0; color: var(--resource-muted); font-size: 12px; line-height: 1.7; }
.rail-card a { display: block; margin-top: 17px; color: #a6481c; font-size: 12px; font-weight: 700; }
.rail-links { display: grid; gap: 0; margin-top: 12px; }
.rail-links a { margin: 0; padding: 12px 0; border-top: 1px solid var(--resource-line); color: #4b5568; font-size: 11px; }

.related-guides { padding: 78px 0; border-top: 1px solid var(--resource-line); background: var(--resource-soft); }
.related-guides h2 { margin: 0 0 30px; font-size: 39px; letter-spacing: -0.045em; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.related-grid a { padding: 24px; border: 1px solid var(--resource-line); border-radius: 8px; background: #fff; }
.related-grid small { display: block; color: #a6481c; font: 700 8px "JetBrains Mono", monospace; letter-spacing: 0.1em; }
.related-grid strong { display: block; margin-top: 10px; font-size: 17px; line-height: 1.25; }

.author-panel { display: grid; grid-template-columns: 160px 1fr; gap: 48px; align-items: start; padding: 38px; border: 1px solid var(--resource-line); border-radius: 12px; background: #fff; }
.author-mark { display: grid; place-items: center; aspect-ratio: 1; border-radius: 10px; background: var(--resource-navy); color: #fff; font: 400 52px "Bebas Neue", sans-serif; letter-spacing: 0.05em; }
.author-panel h2 { margin: 0; font-size: 38px; letter-spacing: -0.045em; }
.author-panel p { color: var(--resource-muted); line-height: 1.8; }

@media (max-width: 960px) {
  .guide-grid { grid-template-columns: 1fr 1fr; }
  .article-wrap { grid-template-columns: minmax(0, 1fr); gap: 42px; }
  .article-rail { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
  .rail-card + .rail-card { margin-top: 0; }
}

@media (max-width: 720px) {
  .resource-hero { padding: 112px 0 67px; }
  .resource-hero h1,
  .article-hero h1 { font-size: 45px; }
  .resource-lede,
  .article-lede { font-size: 16px; }
  .resource-actions { align-items: stretch; flex-direction: column; }
  .library-section { padding: 68px 0; }
  .library-heading { grid-template-columns: 1fr; gap: 18px; }
  .featured-guide { grid-template-columns: 1fr; }
  .featured-map { padding: 25px 31px; }
  .guide-grid,
  .related-grid,
  .article-rail { grid-template-columns: 1fr; }
  .guide-card { min-height: 0; }
  .article-hero { padding: 107px 0 58px; }
  .article-wrap { padding-top: 50px; padding-bottom: 67px; }
  .article-body p,
  .article-body li { font-size: 16px; }
  .process-table { display: block; overflow-x: auto; overscroll-behavior-inline: contain; }
  .process-table::before { content: "Swipe to compare \2192"; display: block; position: sticky; left: 0; padding: 10px 14px; border-bottom: 1px solid var(--resource-line); color: #a6481c; background: #fff7f0; font: 700 9px "JetBrains Mono", monospace; letter-spacing: 0.1em; text-transform: uppercase; }
  .process-table thead,
  .process-table tbody { display: table; width: 650px; table-layout: fixed; }
  .author-panel { grid-template-columns: 1fr; gap: 24px; padding: 25px; }
  .author-mark { width: 120px; }
}