/* BKKx Labs research paper — the "BKKx Law Review" companion to
   the 3D atlas. The aesthetic is the MoMA / Spectral Law style
   we use on the BKKx proposal — paper background, Spectral serif
   for the body, IBM Plex for the inline code, sharp edges, no
   shadows. The thesis is serious, the typography carries it. */

:root {
  --paper-bg: #f1efe8;
  --paper-ink: #11120f;
  --paper-muted: #5b5d54;
  --paper-rule: rgba(17, 18, 15, 0.16);
  --paper-signal: #c9ff38;
  --paper-accent: #c9a227;
  --paper-font-body: "Spectral", ui-serif, Georgia, "Times New Roman", serif;
  --paper-font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --paper-font-thai: "IBM Plex Sans Thai", "Spectral", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--paper-bg); color: var(--paper-ink); }
body { font-family: var(--paper-font-body); font-size: 18px; line-height: 1.7; -webkit-font-smoothing: antialiased; }

a { color: var(--paper-ink); border-bottom: 1px solid var(--paper-ink); text-decoration: none; }
a:hover { color: var(--paper-accent); border-color: var(--paper-accent); }

code {
  font-family: var(--paper-font-mono);
  font-size: 0.88em;
  background: rgba(17, 18, 15, 0.06);
  padding: 1px 5px;
}

::selection { background: var(--paper-signal); color: var(--paper-ink); }

.paper-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  padding: 22px 32px;
  border-bottom: 1px solid var(--paper-rule);
  background: var(--paper-bg);
  position: sticky;
  top: 0;
  z-index: 5;
}

.paper-back {
  font-family: var(--paper-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: none;
}
.paper-back:hover { color: var(--paper-accent); }
.paper-eyebrow {
  font-family: var(--paper-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-muted);
}

.paper-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.paper-article { font-family: var(--paper-font-body); }

.paper-kicker {
  font-family: var(--paper-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-accent);
  margin: 0 0 18px;
}

.paper-title {
  font-family: var(--paper-font-body);
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0 0 18px;
}

.paper-subtitle {
  font-family: var(--paper-font-body);
  font-style: italic;
  font-size: 22px;
  line-height: 1.5;
  color: var(--paper-muted);
  margin: 0 0 36px;
  max-width: 660px;
}

.paper-byline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 18px 0;
  border-top: 1px solid var(--paper-ink);
  border-bottom: 1px solid var(--paper-ink);
  margin: 0 0 48px;
}
.paper-author {
  font-family: var(--paper-font-body);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.paper-affiliation {
  font-style: italic;
  color: var(--paper-muted);
  font-size: 15px;
}
.paper-meta {
  font-family: var(--paper-font-mono);
  font-size: 11px;
  color: var(--paper-muted);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

.paper-section {
  margin: 0 0 48px;
}
.paper-section h2 {
  font-family: var(--paper-font-body);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--paper-rule);
}
.paper-section p {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.7;
}
.paper-section p:first-of-type::first-line {
  font-weight: 600;
}
.paper-section ul, .paper-section ol {
  margin: 0 0 16px;
  padding-left: 24px;
  font-size: 17px;
  line-height: 1.7;
}
.paper-section li { margin-bottom: 6px; }
.paper-section li strong { font-weight: 700; }

.paper-references {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper-muted);
}
.paper-references li { margin-bottom: 12px; }

.paper-foot {
  margin-top: 72px;
  padding-top: 24px;
  border-top: 2px solid var(--paper-ink);
}
.paper-foot p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-muted);
  margin: 0 0 8px;
}
.paper-foot code {
  font-size: 0.92em;
  background: rgba(17, 18, 15, 0.06);
}
.paper-foot-meta {
  margin-top: 16px !important;
  font-family: var(--paper-font-mono);
  font-size: 11px !important;
  letter-spacing: 0.04em;
}

@media (max-width: 600px) {
  .paper-main { padding: 24px 18px 60px; }
  .paper-title { font-size: 32px; }
  .paper-subtitle { font-size: 18px; }
  .paper-section h2 { font-size: 22px; }
  .paper-section p, .paper-section ul, .paper-section ol { font-size: 16px; }
}