:root {
  --bg: #05070c;
  --bg-deep: #02040a;
  --panel: #0a0e17;
  --blue: #061f65;
  --blue-bright: #5e9eff;
  --line: rgba(255, 255, 255, 0.12);
  --line-soft: rgba(255, 255, 255, 0.07);
  --text: #f5f5f7;
  --muted: rgba(255, 255, 255, 0.64);
  --faint: rgba(255, 255, 255, 0.38);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

a { color: inherit; text-decoration: none; }
.shell { width: min(1240px, calc(100% - 96px)); margin-inline: auto; }
.blueprint {
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(90deg, rgba(2, 4, 10, 0.92) 0%, rgba(2, 6, 16, 0.72) 48%, rgba(2, 7, 18, 0.28) 100%),
    linear-gradient(180deg, rgba(2, 4, 10, 0.18), rgba(2, 4, 10, 0.68)),
    url("/bird-plane-blueprint.webp");
  background-position: center, center, 58% center;
  background-size: cover, cover, cover;
  background-repeat: no-repeat;
}
.eyebrow, .section-tag {
  font: 500 0.65rem/1.4 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

nav {
  position: relative;
  height: 80px;
  padding: 0 4vw;
  background: rgba(2, 4, 10, 0.94);
  border-bottom: 1px solid var(--line);
}
.nav-logo {
  font: 600 0.82rem var(--mono);
  letter-spacing: 0.18em;
}
.nav-links { gap: 32px; }
.nav-links a {
  color: var(--muted);
  font: 500 0.62rem var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-cta {
  color: var(--text) !important;
  padding: 11px 15px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 0;
  background: transparent;
}

.index-hero {
  min-height: 535px;
  padding: 105px 0 90px;
  position: relative;
  overflow: hidden;
}
.index-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 58%, rgba(1, 8, 29, 0.32));
  pointer-events: none;
}
.index-hero .shell { position: relative; z-index: 1; }
.index-hero h1 {
  max-width: 820px;
  margin: 32px 0 34px;
  font: 400 clamp(5rem, 9vw, 8.4rem)/0.78 var(--display);
  letter-spacing: -0.065em;
}
.index-hero h1 em { color: var(--blue-bright); font-weight: 400; }
.index-hero .hero-deck {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.78);
  font: 1.2rem/1.6 var(--display);
}

.articles-page {
  width: min(1240px, calc(100% - 96px));
  max-width: none;
  display: grid;
  grid-template-columns: minmax(190px, 0.75fr) minmax(0, 3fr);
  gap: 76px;
  padding: 105px 0 125px;
}
.articles-page-header {
  position: sticky;
  top: 35px;
  align-self: start;
  margin: 0;
}
.articles-page-header p:last-child {
  max-width: 260px;
  margin-top: 28px;
  color: var(--muted);
  font: 1.08rem/1.55 var(--display);
}
.article-list { min-width: 0; }
.article-card {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 34px;
  gap: 22px;
  margin: 0;
  padding: 34px 0;
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  transition: color 0.22s, padding 0.22s;
}
.article-card:last-child { border-bottom: 1px solid var(--line); }
.article-card:hover {
  padding-left: 10px;
  border-color: var(--line);
  background: transparent;
  color: var(--blue-bright);
}
.article-number, .article-card-meta {
  font: 500 0.6rem var(--mono);
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.article-number { padding-top: 4px; color: var(--faint); }
.article-card-meta {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  color: var(--faint);
  flex-wrap: wrap;
}
.article-card-title {
  margin-bottom: 12px;
  color: inherit;
  font: 400 clamp(1.7rem, 3vw, 2.35rem)/1.05 var(--display);
  letter-spacing: -0.035em;
}
.article-card-excerpt {
  max-width: 730px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.58;
  -webkit-line-clamp: 2;
}
.article-card-arrow {
  margin: 0;
  color: var(--faint);
  font-size: 1.35rem;
  transition: transform 0.22s, color 0.22s;
}
.article-card:hover .article-card-arrow {
  color: var(--blue-bright);
  transform: translate(3px, -3px);
}

.article-hero { padding: 82px 0 100px; }
.article-hero-inner { width: min(980px, calc(100% - 96px)); margin: auto; }
.article-back {
  display: inline-block;
  margin: 0 0 70px;
  color: rgba(255, 255, 255, 0.72);
  font: 500 0.62rem var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.article-single-title {
  max-width: 950px;
  margin: 30px 0 45px;
  color: var(--text);
  font: 400 clamp(3.5rem, 7vw, 6rem)/0.9 var(--display);
  letter-spacing: -0.052em;
}
.article-single-meta {
  display: flex;
  gap: 48px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.72);
  font: 500 0.61rem var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.article-layout {
  width: min(1240px, calc(100% - 96px));
  display: grid;
  grid-template-columns: 220px minmax(0, 720px);
  justify-content: center;
  gap: 88px;
  padding: 90px 0 110px;
}
.article-sidebar {
  color: var(--muted);
  font: 0.68rem/1.7 var(--mono);
  letter-spacing: 0.04em;
}
.article-sidebar p { margin-top: 22px; }
.article-sidebar a {
  display: inline-block;
  margin-top: 26px;
  border-bottom: 1px solid;
  color: var(--text);
}
.article-stamp {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--text);
  font-size: 0.55rem;
  letter-spacing: 0.13em;
}
.article-stamp img {
  width: 50px;
  height: 50px;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.72;
}
.article-body {
  min-width: 0;
  color: rgba(255, 255, 255, 0.72);
  font: 1.08rem/1.78 var(--display);
}
.article-body > p:first-child { color: var(--text); font-size: 1.45rem; line-height: 1.55; }
.article-body h1, .article-body h2, .article-body h3, .article-body h4 {
  color: var(--text);
  font-family: var(--display);
  font-weight: 400;
  letter-spacing: -0.035em;
}
.article-body h2 { margin: 58px 0 18px; font-size: 2.7rem; line-height: 1.06; }
.article-body h3 { margin: 40px 0 13px; font-size: 1.85rem; line-height: 1.14; }
.article-body h4 { margin: 32px 0 10px; font-size: 1.35rem; }
.article-body p, .article-body ul, .article-body ol, .article-body table, .article-body pre, .article-body blockquote { margin-bottom: 24px; }
.article-body li { margin-bottom: 9px; }
.article-body a { color: var(--blue-bright); text-decoration: underline; text-underline-offset: 3px; }
.article-body strong { color: var(--text); }
.article-body code { border-radius: 0; background: var(--panel); font-family: var(--mono); font-size: 0.8em; }
.article-body pre { border-radius: 0; background: var(--panel); border: 1px solid var(--line); }
.article-body blockquote { border-radius: 0; border-left: 3px solid var(--blue-bright); background: var(--panel); }
.article-body img { border-radius: 0; border-color: var(--line); background: var(--panel); }
.article-body table { width: 100%; border-collapse: collapse; font: 0.82rem/1.5 var(--sans); }
.article-body th, .article-body td { padding: 12px; border: 1px solid var(--line); text-align: left; }

.app-cta {
  width: min(1120px, calc(100% - 96px));
  margin: 0 auto 120px;
  padding: 58px 62px;
  display: grid;
  grid-template-columns: 1.3fr 1fr auto;
  gap: 45px;
  align-items: end;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 0;
  background-color: var(--blue);
  background-image: radial-gradient(circle, rgba(255,255,255,0.2) 0.7px, transparent 0.9px);
  background-size: 14px 14px;
}
.app-cta-kicker { margin: 0; color: var(--blue-bright); font: 500 0.62rem var(--mono); letter-spacing: 0.16em; text-transform: uppercase; }
.app-cta-title { margin: 26px 0 0; color: var(--text); font: 400 2.9rem/0.98 var(--display); letter-spacing: -0.04em; }
.app-cta-copy { margin: 0; color: rgba(255, 255, 255, 0.72); font: 1rem/1.55 var(--display); }
.app-cta-link {
  min-height: 0;
  display: flex;
  gap: 30px;
  padding: 16px 18px;
  border: 1px solid rgba(255,255,255,0.65);
  border-radius: 0;
  background: transparent;
  color: var(--text) !important;
  font: 500 0.62rem var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}
footer {
  padding: 55px 5vw 32px;
  text-align: left;
  background: #010208;
  border-top: 1px solid var(--line);
}
.footer-brand { font: 600 0.85rem var(--mono); letter-spacing: 0.15em; text-transform: uppercase; }
.footer-brand span { color: var(--blue-bright); }
.footer-links {
  justify-content: flex-start;
  gap: 18px;
  margin-top: 28px;
  font: 500 0.6rem var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text); }

@media (max-width: 900px) {
  .shell { width: min(100% - 40px, 720px); }
  nav { padding-inline: 20px; }
  .nav-links a:not(.active):not(.nav-cta) { display: none; }
  .index-hero { min-height: auto; padding: 85px 0 75px; }
  .index-hero h1 { font-size: clamp(4.6rem, 17vw, 7rem); }
  .articles-page { width: min(100% - 40px, 720px); grid-template-columns: 1fr; gap: 48px; padding-block: 75px 90px; }
  .articles-page-header { position: static; }
  .articles-page-header p:last-child { max-width: 560px; }
  .article-layout { width: min(100% - 40px, 720px); grid-template-columns: 1fr; gap: 45px; padding-block: 70px 90px; }
  .article-sidebar { display: none; }
  .article-hero-inner { width: min(100% - 40px, 720px); }
  .article-single-title { font-size: clamp(3rem, 11vw, 5rem); }
  .app-cta { width: min(100% - 40px, 720px); grid-template-columns: 1fr; padding: 44px; }
}

@media (max-width: 560px) {
  nav { height: 72px; }
  .nav-logo::after { display: none; }
  .nav-links { gap: 12px; }
  .nav-cta { padding: 9px 12px; }
  .index-hero { padding-top: 70px; }
  .index-hero h1 { font-size: 4.1rem; }
  .index-hero .hero-deck { font-size: 1.05rem; }
  .article-card { grid-template-columns: 34px minmax(0, 1fr) 22px; gap: 12px; padding: 27px 0; }
  .article-card-title { font-size: 1.55rem; }
  .article-card-excerpt { font-size: 0.9rem; }
  .article-hero { padding: 65px 0 75px; }
  .article-back { margin-bottom: 52px; }
  .article-single-meta { flex-direction: column; gap: 8px; }
  .article-body { font-size: 1.02rem; }
  .article-body > p:first-child { font-size: 1.25rem; }
  .article-body h2 { font-size: 2.15rem; }
  .app-cta { padding: 32px 26px; margin-bottom: 75px; }
  .app-cta-title { font-size: 2.3rem; }
  .footer-links { flex-wrap: wrap; }
}