:root {
  color-scheme: dark;
  --bg: #161a20;
  --surface: #1f252d;
  --ink: #e4e8ee;
  --muted: #a2acb8;
  --accent: #9fbbe2;
  --line: #36414f;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Charter", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  min-height: 100vh;
  padding: 36px 6vw 48px;
}

.scanline {
  display: none;
}

.site-header,
main,
.site-footer {
  max-width: 940px;
  margin-left: auto;
  margin-right: auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
  gap: 12px;
}

.brand h1 {
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.kicker {
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 0.92rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.nav a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.hero {
  padding: 8px 0 22px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.eyebrow {
  color: var(--muted);
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.hero h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  margin-bottom: 8px;
  line-height: 1.2;
  color: var(--ink);
}

.lead {
  color: var(--muted);
  font-size: 1.05rem;
}

.meta {
  display: flex;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--muted);
}

.section {
  margin-bottom: 34px;
}

.section h3 {
  color: var(--accent);
  font-size: 1.22rem;
  margin-bottom: 10px;
}

.section-note {
  font-size: 1.04rem;
  color: var(--muted);
  margin-bottom: 10px;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.nav-button {
  display: block;
  text-align: center;
  text-decoration: none;
  color: var(--accent);
  border: 1px solid var(--line);
  padding: 13px 10px;
  background: var(--surface);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.nav-button:hover {
  border-color: var(--accent);
  background: #28313b;
}

.list {
  list-style: disc;
  padding-left: 1.2rem;
  display: grid;
  gap: 6px;
}

.posts {
  display: grid;
  gap: 22px;
}

.post-card {
  border: 1px solid var(--line);
  padding: 28px;
  background: var(--surface);
}

.post-meta {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 8px;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.post-title {
  font-size: clamp(1.65rem, 2.8vw, 2.1rem);
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--ink);
}

.post-excerpt {
  font-size: 1.07rem;
  line-height: 1.9;
  color: var(--ink);
}

.post-card .post-excerpt + .post-excerpt {
  margin-top: 16px;
}

.post-card .post-excerpt strong {
  display: block;
  font-size: 1.34rem;
  line-height: 1.35;
  color: var(--accent);
  margin-bottom: 8px;
  margin-top: 16px;
}

.post-card .list {
  margin: 12px 0 20px;
  gap: 8px;
}

.flow-diagram {
  display: block;
  margin: 14px 0 20px;
  padding: 14px;
  border: 1px solid var(--line);
  background: #1a212a;
}

.flow-caption {
  font-family: "SFMono-Regular", "Menlo", "Consolas", monospace;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.flow-steps {
  display: grid;
  gap: 10px;
}

.flow-step {
  position: relative;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  align-items: start;
  border: 1px solid var(--line);
  background: #0f151d;
  padding: 10px 12px;
}

.flow-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 30px;
  top: calc(100% + 2px);
  width: 2px;
  height: 12px;
  background: var(--line);
}

.flow-step:not(:last-child)::after {
  content: "▼";
  position: absolute;
  left: 24px;
  top: calc(100% + 9px);
  font-size: 0.76rem;
  color: var(--accent);
  line-height: 1;
}

.flow-step-num {
  display: inline-flex;
  width: 30px;
  height: 22px;
  align-items: center;
  justify-content: center;
  border: 1px solid #6f839c;
  background: #223247;
  color: #d7e6fa;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 700;
}

.flow-step-body {
  min-width: 0;
}

.flow-step-text {
  font-size: 0.92rem;
  line-height: 1.35;
  font-family: "SFMono-Regular", "Menlo", "Consolas", monospace;
  color: #e2e9f3;
}

.flow-step-meta {
  margin-top: 3px;
  font-size: 0.82rem;
  line-height: 1.3;
  color: #a9b9cd;
  font-family: "SFMono-Regular", "Menlo", "Consolas", monospace;
}

.post-link {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.post-link:hover {
  color: #bdd2f0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--muted);
}

.links {
  margin-top: 6px;
  display: flex;
  gap: 8px;
  align-items: center;
}

.links a {
  color: var(--accent);
  text-decoration: none;
}

.links a:hover {
  text-decoration: underline;
}

@media (max-width: 720px) {
  body {
    padding: 26px 5vw 34px;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .meta {
    flex-direction: column;
    gap: 4px;
  }

  .link-grid {
    grid-template-columns: 1fr;
  }

  .post-card {
    padding: 20px;
  }

  .flow-diagram {
    padding: 10px;
  }
}