/*
Design philosophy: Editorial Systems Modernism — warm institutional paper, precise systems navigation, and diagram plates as evidence exhibits.
This stylesheet keeps presentation separate from content so the archive contains no inline image data or inline CSS.
*/
:root {
  --ink: #20231e;
  --muted: #68685f;
  --paper: #fbf5e8;
  --paper-deep: #efe1c9;
  --panel: #fffdf7;
  --rule: #dacbb3;
  --accent: #b75b2a;
  --accent-dark: #743818;
  --green: #2e463b;
  --shadow: 0 22px 60px rgba(54, 41, 23, 0.13);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(183, 91, 42, 0.11), transparent 34rem),
    linear-gradient(135deg, #fbf5e8 0%, #f6ecd9 44%, #fffaf0 100%);
  color: var(--ink);
  font-family: Charter, Georgia, 'Times New Roman', serif;
  line-height: 1.68;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.28;
  background-image: repeating-linear-gradient(90deg, rgba(70, 48, 24, 0.035) 0, rgba(70, 48, 24, 0.035) 1px, transparent 1px, transparent 5px);
}
.site-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(251, 245, 232, 0.82);
  border-bottom: 1px solid rgba(116, 56, 24, 0.14);
}
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { font-family: Arial, Helvetica, sans-serif; font-size: 0.76rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--accent-dark); font-weight: 700; }
.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px 16px; font-family: Arial, Helvetica, sans-serif; font-size: 0.78rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--accent-dark); }
.hero { padding: clamp(56px, 8vw, 104px) 0 clamp(36px, 6vw, 76px); }
.kicker { margin: 0 0 18px; font-family: Arial, Helvetica, sans-serif; color: var(--accent); font-size: 0.82rem; letter-spacing: 0.17em; text-transform: uppercase; font-weight: 700; }
.article-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}
.article-card {
  background: rgba(255, 253, 247, 0.72);
  border: 1px solid rgba(116, 56, 24, 0.14);
  box-shadow: var(--shadow);
  padding: clamp(24px, 5vw, 70px);
}
aside.toc {
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  overflow: auto;
  padding: 20px;
  background: rgba(255, 253, 247, 0.64);
  border: 1px solid rgba(116, 56, 24, 0.14);
}
.toc-title { margin: 0 0 12px; font-family: Arial, Helvetica, sans-serif; font-size: 0.75rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-dark); font-weight: 800; }
.toc a { display: block; padding: 7px 0; color: var(--muted); text-decoration: none; font-family: Arial, Helvetica, sans-serif; font-size: 0.82rem; line-height: 1.3; border-top: 1px solid rgba(116, 56, 24, 0.08); }
.toc a:hover { color: var(--ink); }
h1, h2, h3 { font-family: Arial, Helvetica, sans-serif; letter-spacing: -0.035em; line-height: 1.05; color: var(--ink); }
h1 { max-width: 11ch; margin: 0 0 24px; font-size: clamp(3.1rem, 9.5vw, 7.8rem); }
h1 + p { max-width: 820px; margin: 0 0 32px; font-size: clamp(1.08rem, 2vw, 1.42rem); color: var(--green); line-height: 1.45; }
h2 { margin: clamp(50px, 7vw, 86px) 0 20px; padding-top: 28px; border-top: 1px solid var(--rule); font-size: clamp(2rem, 5vw, 4.4rem); }
h3 { margin: 34px 0 12px; font-size: clamp(1.35rem, 2.3vw, 2.05rem); color: var(--green); }
p { margin: 0 0 18px; font-size: clamp(1rem, 1.08vw, 1.15rem); }
strong { font-weight: 800; }
a { color: var(--accent-dark); }
blockquote { margin: 28px 0; padding: 18px 24px; background: #fff8ed; border-left: 5px solid var(--accent); color: #38372f; }
table { width: 100%; border-collapse: collapse; margin: 30px 0; font-family: Arial, Helvetica, sans-serif; font-size: 0.92rem; background: rgba(255, 253, 247, 0.86); }
th, td { border: 1px solid var(--rule); padding: 13px 14px; vertical-align: top; }
th { background: #efe1c9; text-align: left; color: var(--accent-dark); }
.diagram-plate { margin: 34px 0 44px; padding: clamp(12px, 2vw, 22px); background: var(--panel); border: 1px solid rgba(116, 56, 24, 0.16); box-shadow: var(--shadow); border-radius: 28px; }
.diagram-image { display: block; width: 100%; height: auto; border-radius: 20px; }
figcaption { margin-top: 12px; color: var(--muted); font-family: Arial, Helvetica, sans-serif; font-size: 0.9rem; line-height: 1.45; }
.site-footer { padding: 48px 0 70px; color: var(--muted); font-family: Arial, Helvetica, sans-serif; font-size: 0.9rem; }
@media (max-width: 920px) {
  .article-frame { display: block; }
  aside.toc { position: relative; top: auto; max-height: none; margin-bottom: 24px; }
  .nav { display: none; }
}
@media (max-width: 620px) {
  .site-shell { width: min(100% - 20px, 1180px); }
  .header-inner { min-height: 58px; }
  .article-card { padding: 20px 16px; }
  h1 { font-size: clamp(2.7rem, 16vw, 4.2rem); }
  h2 { font-size: clamp(1.85rem, 10vw, 2.8rem); }
  table { display: block; overflow-x: auto; white-space: normal; }
  .diagram-plate { border-radius: 20px; }
  .diagram-image { border-radius: 14px; }
}