:root {
  color-scheme: dark;
  --bg: #090b0e;
  --surface: #11151a;
  --surface-strong: #171d24;
  --surface-soft: #0d1116;
  --text: #f4f7fa;
  --muted: #9ca8b5;
  --border: #27313b;
  --accent: #8ec5ff;
  --accent-strong: #c2e2ff;
  --good: #a8e6bd;
  --max: 1180px;
  --reading: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 85% 10%, rgba(142, 197, 255, 0.08), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
code, pre { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }

.site-shell {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--border);
}
.brand {
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.site-nav a {
  color: var(--muted);
  font-size: 0.94rem;
  text-decoration: none;
}
.site-nav a[aria-current="page"],
.site-nav a:hover,
.site-nav a:focus-visible { color: var(--text); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.65fr);
  gap: clamp(42px, 8vw, 96px);
  align-items: end;
  padding: clamp(82px, 13vw, 154px) 0 clamp(72px, 10vw, 116px);
  border-bottom: 1px solid var(--border);
}
.hero-main { min-width: 0; }
.hero-aside {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(17, 21, 26, 0.72);
}
.hero-aside p:last-child { margin-bottom: 0; }

.eyebrow,
.card-meta,
.kicker {
  margin: 0;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1, h2, h3, h4, p { margin-top: 0; }
h1 {
  max-width: 13ch;
  margin: 18px 0 24px;
  font-size: clamp(3.5rem, 8.6vw, 7.2rem);
  line-height: 0.92;
  letter-spacing: -0.06em;
}
h2 {
  margin-bottom: 14px;
  font-size: clamp(2rem, 4.7vw, 3.45rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
}
h3 {
  margin: 10px 0 12px;
  font-size: 1.36rem;
  line-height: 1.2;
}
h4 { margin-bottom: 8px; font-size: 1rem; }

.hero-copy,
.section-heading p,
.card p,
.page-intro,
.muted { color: var(--muted); }
.hero-copy {
  max-width: 720px;
  font-size: clamp(1.12rem, 2.3vw, 1.38rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}
.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}
.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #07111d;
}
.button:hover, .button:focus-visible { transform: translateY(-1px); }

.section {
  padding: 76px 0;
  border-bottom: 1px solid var(--border);
}
.section-heading { max-width: 760px; }
.section-split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(34px, 7vw, 86px);
  align-items: start;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}
.featured-card { background: var(--surface-strong); }
.card .text-link { margin-top: 4px; }

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: var(--border);
}
.metric {
  padding: 20px;
  background: var(--surface-soft);
}
.metric strong { display: block; margin-bottom: 4px; font-size: 1.05rem; }
.metric span { color: var(--muted); font-size: 0.9rem; }

.text-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--accent-strong);
  font-weight: 700;
  text-decoration: none;
}
.text-link:hover, .text-link:focus-visible { text-decoration: underline; }

.page-header {
  max-width: 860px;
  padding: 88px 0 58px;
}
.page-header h1 { max-width: 12ch; }
.page-header.wide { max-width: 1040px; }

.article-list {
  display: grid;
  gap: 0;
  padding-bottom: 72px;
}
.article-card {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) auto;
  gap: 26px;
  align-items: start;
  padding: 28px 0;
  border-top: 1px solid var(--border);
}
.article-card h2 { margin-bottom: 10px; font-size: clamp(1.55rem, 3.5vw, 2.3rem); }
.article-card .text-link { white-space: nowrap; }

.series-label {
  display: inline-flex;
  padding: 5px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
}

.architecture-flow {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  margin-top: 32px;
}
.flow-step {
  position: relative;
  min-height: 132px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-soft);
}
.flow-step strong { display: block; margin-bottom: 8px; }
.flow-step span { color: var(--muted); font-size: 0.88rem; }
.flow-step:not(:last-child)::after {
  content: ">";
  position: absolute;
  top: 50%;
  right: -9px;
  z-index: 2;
  width: 16px;
  text-align: center;
  color: var(--accent);
  background: var(--bg);
  transform: translateY(-50%);
}

.article-shell {
  width: min(100%, var(--reading));
  margin: 0 auto;
  padding: 74px 0 96px;
}
.article-header { margin-bottom: 54px; }
.article-header h1 {
  max-width: 15ch;
  font-size: clamp(3rem, 8vw, 5.8rem);
}
.article-deck {
  color: var(--muted);
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}
.article-body { font-size: 1.08rem; }
.article-body h2 { margin: 58px 0 18px; font-size: clamp(2rem, 5vw, 3rem); }
.article-body h3 { margin-top: 34px; }
.article-body p, .article-body ul, .article-body ol { margin-bottom: 1.4em; }
.article-body blockquote {
  margin: 34px 0;
  padding: 4px 0 4px 22px;
  border-left: 3px solid var(--accent);
  color: var(--accent-strong);
  font-size: 1.2rem;
}
.article-body pre {
  overflow-x: auto;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-soft);
  font-size: 0.9rem;
}
.article-note {
  margin: 34px 0;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 32px 0 56px;
  color: var(--muted);
  font-size: 0.9rem;
}
.site-footer p { margin: 0; }

@media (max-width: 960px) {
  .hero, .section-split { grid-template-columns: 1fr; }
  .hero-aside { max-width: 560px; }
  .card-grid.three { grid-template-columns: 1fr 1fr; }
  .architecture-flow { grid-template-columns: repeat(3, 1fr); }
  .flow-step:nth-child(3)::after { display: none; }
}

@media (max-width: 760px) {
  .site-header, .site-footer { align-items: flex-start; flex-direction: column; }
  .site-nav { gap: 14px; }
  .card-grid, .card-grid.three, .metric-strip { grid-template-columns: 1fr; }
  .article-card { grid-template-columns: 1fr; gap: 8px; }
  .architecture-flow { grid-template-columns: 1fr; }
  .flow-step::after { display: none; }
  h1 { font-size: clamp(3rem, 15vw, 5.2rem); }
}