:root {
  --bg: #f7f5f0;
  --bg-elev: #ffffff;
  --ink: #1a1c1e;
  --ink-soft: #3d4248;
  --muted: #6b7280;
  --line: #e4e0d6;
  --accent: #0b3d5c;
  --accent-soft: #e8f0f5;
  --warn: #8a4b12;
  --ctx: #5b4a2a;
  --ctx-bg: #f3ebe0;
  --ok: #1f5c3a;
  --radius: 12px;
  --max: 44rem;
  --nav-h: 3.5rem;
  --shadow: 0 1px 2px rgba(26, 28, 30, 0.04), 0 8px 24px rgba(26, 28, 30, 0.04);
  color-scheme: light;
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1.25rem);
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { color: #072a40; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
  background: #fff;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  backdrop-filter: blur(12px);
  background: rgba(247, 245, 240, 0.92);
  border-bottom: 1px solid var(--line);
}

.site-nav .inner {
  width: min(72rem, calc(100% - 2rem));
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}

.brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--ink);
  flex: 0 0 auto;
  min-width: 0;
}
.brand-mark {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: block;
}
.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
  min-width: 0;
}
.brand strong {
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.brand-copy > span {
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.jump {
  display: flex;
  gap: 0.15rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  max-width: 100%;
}
.jump::-webkit-scrollbar { display: none; }
.jump a {
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  white-space: nowrap;
}
.jump a:hover,
.jump a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
}
.jump a[aria-current="true"] {
  background: var(--accent);
  color: #fff;
}

.wrap {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 4.5rem;
}

.hero {
  padding: 1.25rem 0 2.25rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.75rem;
}
.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}
.hero h1 {
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  font-weight: 600;
  font-size: clamp(1.85rem, 4.5vw, 2.55rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  max-width: 22ch;
}
.hero .lede {
  margin: 0 0 1.25rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 46ch;
}
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.86rem;
  color: var(--muted);
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

section.block {
  margin: 0 0 3.5rem;
  scroll-margin-top: calc(var(--nav-h) + 1.25rem);
}
section.block > header {
  margin-bottom: 1.35rem;
}
section.block > header .kicker {
  margin: 0 0 0.4rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
section.block > header h2 {
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  font-size: clamp(1.55rem, 3.2vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin: 0 0 0.55rem;
}
section.block > header p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.15rem 1.2rem;
}
.card + .card { margin-top: 0.85rem; }

.grid-2 {
  display: grid;
  gap: 0.85rem;
}
@media (min-width: 720px) {
  .grid-2 { grid-template-columns: 1fr 1fr; }
  .grid-2 .span-2 { grid-column: 1 / -1; }
}

.fact h3 {
  margin: 0 0 0.45rem;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  color: var(--accent);
}
.fact p { margin: 0 0 0.55rem; color: var(--ink-soft); font-size: 0.98rem; }
.fact p:last-child { margin-bottom: 0; }

.stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}
@media (min-width: 640px) {
  .stat-row { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.stat {
  background: var(--accent-soft);
  border-radius: 10px;
  padding: 0.85rem 0.9rem;
}
.stat .label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.3rem;
}
.stat .value {
  display: block;
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  font-size: 1.25rem;
  line-height: 1.2;
  color: var(--ink);
}
.stat .note {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
}

.src {
  font-size: 0.78rem;
  color: var(--muted);
}
.src a { white-space: nowrap; }

.thesis-lead {
  font-family: Georgia, "Iowan Old Style", "Times New Roman", serif;
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  line-height: 1.45;
  color: var(--ink);
  margin: 0 0 1rem;
}
.thesis-lead em {
  font-style: italic;
  color: var(--accent);
}

.stack { display: grid; gap: 0.85rem; }
.stack h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}
.stack ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--ink-soft);
}
.stack li { margin: 0.35rem 0; }
.stack li::marker { color: var(--accent); }

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}
.timeline li {
  display: grid;
  gap: 0.35rem 1rem;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}
@media (min-width: 640px) {
  .timeline li {
    grid-template-columns: 9.5rem 1fr;
    align-items: start;
  }
}
.when {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.01em;
}
.item-body h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  line-height: 1.35;
}
.item-body p {
  margin: 0 0 0.45rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}
.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  margin-bottom: 0.35rem;
}
.badge.ctx {
  background: var(--ctx-bg);
  color: var(--ctx);
}
.badge.merlin {
  background: var(--accent-soft);
  color: var(--accent);
}
.badge.planned {
  background: #efe8df;
  color: var(--warn);
}

.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}
.news-list li {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow);
}
.news-list .date {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.news-list h3 {
  margin: 0.25rem 0 0.4rem;
  font-size: 1.02rem;
  line-height: 1.35;
}
.news-list h3 a { text-decoration: none; color: var(--ink); }
.news-list h3 a:hover { color: var(--accent); text-decoration: underline; }
.news-list .tie {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.news-list .tie strong { color: var(--accent); font-weight: 600; }

.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 0.9rem 1rem;
  border-radius: 0 10px 10px 0;
  margin: 1rem 0 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.callout strong { color: var(--ink); }

.footnote {
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--muted);
}

.site-foot {
  border-top: 1px solid var(--line);
  padding: 2rem 0 3rem;
  color: var(--muted);
  font-size: 0.86rem;
}
.site-foot .wrap { padding-top: 0; padding-bottom: 0; }
.site-foot p { margin: 0 0 0.65rem; max-width: 52ch; }

.rules {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 1rem 0 0;
}
.rules span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: #efece4;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
}

@media (max-width: 520px) {
  .brand-copy > span { display: none; }
  .jump a { padding: 0.4rem 0.55rem; font-size: 0.74rem; }
}