:root {
  --page: #cfe1f6;
  --ink: #102033;
  --muted: #52687e;
  --panel: #ffffff;
  --navy: #0b1f42;
  --blue: #1d64d8;
  --sky: #38bdf8;
  --teal: #0f9f9a;
  --aws: #ff9900;
  --line: #c9d8eb;
  --soft: #e3efff;
  --shadow: 0 20px 50px rgba(15, 42, 84, 0.14);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background:
    linear-gradient(140deg, rgba(56, 189, 248, 0.24), transparent 34rem),
    linear-gradient(30deg, rgba(29, 100, 216, 0.16), transparent 30rem),
    var(--page);
  color: var(--ink);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1060px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(16, 42, 84, 0.12);
  background: rgba(207, 225, 246, 0.92);
  backdrop-filter: blur(16px);
}
nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { color: var(--navy); font-weight: 800; white-space: nowrap; }
.logo span { color: var(--blue); }
.nav-links { display: flex; align-items: center; gap: 20px; list-style: none; color: var(--muted); font-size: 0.93rem; font-weight: 700; }
.nav-links a:hover { color: var(--blue); }
.article-hero { padding: 62px 0 28px; }
.kicker { color: var(--blue); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.09em; text-transform: uppercase; margin-bottom: 16px; }
h1 { max-width: 900px; color: var(--navy); font-size: clamp(2.35rem, 6vw, 4.35rem); line-height: 1.04; letter-spacing: 0; margin-bottom: 18px; }
.summary { max-width: 820px; color: var(--muted); font-size: 1.1rem; }
.meta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px; }
.meta-card, .content-card, .callout, .resume-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(16, 42, 84, 0.12);
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(15, 42, 84, 0.08);
}
.meta-card { padding: 18px; }
.meta-card strong { display: block; color: var(--navy); margin-bottom: 8px; }
.status { display: inline-flex; border-radius: 999px; padding: 5px 10px; color: #087773; background: rgba(15, 159, 154, 0.12); border: 1px solid rgba(15, 159, 154, 0.26); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tags span { background: var(--soft); border: 1px solid rgba(29, 100, 216, 0.12); border-radius: 5px; color: #284b74; font-size: 0.75rem; font-weight: 800; padding: 4px 8px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 290px; gap: 26px; align-items: start; padding: 28px 0 66px; }
.content-stack { display: grid; gap: 18px; }
.content-card { padding: 24px; }
.content-card h2 { color: var(--navy); font-size: 1.55rem; line-height: 1.2; margin-bottom: 10px; }
.content-card h3 { color: var(--navy); font-size: 1.08rem; margin: 18px 0 6px; }
.content-card p { color: var(--muted); margin-bottom: 12px; }
.content-card p:last-child { margin-bottom: 0; }
.content-card ul { color: var(--muted); display: grid; gap: 8px; padding-left: 22px; margin: 10px 0 0; }
.diagram {
  background: #0b1f42;
  border: 1px solid rgba(56, 189, 248, 0.22);
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(15, 42, 84, 0.12);
  overflow: hidden;
}
.flow-track {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  gap: 12px 10px;
  overflow: visible;
  padding: 18px;
}
.flow-step {
  align-items: center;
  display: flex;
  flex: 1 1 220px;
  gap: 10px;
  min-width: 0;
}
.flow-node {
  align-items: center;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  box-shadow: 0 14px 30px rgba(2, 10, 24, 0.18);
  color: var(--navy);
  display: grid;
  flex: 1 1 auto;
  gap: 9px;
  grid-template-columns: 38px minmax(0, 1fr);
  min-height: 72px;
  min-width: 0;
  padding: 11px;
}
.flow-icon {
  align-items: center;
  background: linear-gradient(145deg, #fff7eb, #eaf4ff);
  border: 1px solid rgba(16, 42, 84, 0.1);
  border-radius: 8px;
  color: #7a4600;
  display: flex;
  font-size: 0.72rem;
  font-weight: 900;
  height: 38px;
  justify-content: center;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  width: 38px;
}
.flow-icon img {
  display: block;
  height: 29px;
  object-fit: contain;
  width: 29px;
}
.flow-icon.has-icon {
  background: #fff;
}
.flow-icon.has-icon span { display: none; }
.flow-copy strong {
  color: var(--navy);
  display: block;
  font-size: 0.84rem;
  line-height: 1.22;
}
.flow-copy span {
  color: var(--muted);
  display: block;
  font-size: 0.68rem;
  font-weight: 800;
  margin-top: 5px;
  text-transform: uppercase;
}
.flow-arrow {
  align-items: center;
  color: #d8ecff;
  display: grid;
  flex: 0 0 42px;
  font-size: 0.68rem;
  font-weight: 800;
  gap: 4px;
  justify-items: center;
  min-height: 72px;
  text-align: center;
}
.flow-arrow::before {
  color: var(--aws);
  content: "->";
  font-size: 1.28rem;
  line-height: 1;
}
.flow-arrow span {
  max-width: 58px;
}
.side { display: grid; gap: 14px; position: sticky; top: 92px; }
.callout { padding: 18px; }
.callout strong { color: var(--navy); display: block; margin-bottom: 6px; }
.callout p { color: var(--muted); font-size: 0.95rem; }
.side a, .text-link { color: var(--blue); font-weight: 800; }
.side a:hover, .text-link:hover { color: var(--teal); }
.resume-grid { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 22px; padding: 28px 0 66px; align-items: start; }
.resume-card { padding: 24px; }
.resume-card h2 { color: var(--navy); font-size: 1.35rem; margin-bottom: 10px; }
.resume-card h3 { color: var(--navy); font-size: 1.08rem; margin-top: 16px; }
.resume-card p, .resume-card li { color: var(--muted); }
.resume-card ul { padding-left: 22px; display: grid; gap: 8px; margin-top: 8px; }
footer { color: var(--muted); font-size: 0.9rem; padding: 28px 0; text-align: center; }
@media (max-width: 900px) {
  .article-layout, .resume-grid, .meta-grid { grid-template-columns: 1fr; }
  .side { position: static; }
}
@media (max-width: 720px) {
  .container { width: min(100% - 28px, 1060px); }
  nav { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .nav-links { width: 100%; gap: 16px; overflow-x: auto; padding-bottom: 4px; }
  .flow-track { padding: 16px; }
  .flow-step { flex-basis: 100%; }
  .flow-arrow { flex-basis: 34px; }
}