@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=IBM+Plex+Mono:wght@400;500&family=Inter:wght@400;500;600&display=swap');

:root {
  --black: #0f0f0f;
  --dark: #1a1a1a;
  --mid: #555;
  --light: #999;
  --border: #e8e8e4;
  --bg: #ffffff;
  --bg-subtle: #f5f5f5;
  --bg-code: #f3f3f0;
  --accent: #1e2d3d;
  --green: #2d6a4f;
  --green-bg: #f0faf4;
  --amber: #92400e;
  --amber-bg: #fffbeb;
  --page-width: 1200px;
}

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

html, body { background-color: #ffffff !important; }

body {
  font-family: 'Libre Baskerville', Georgia, serif;
  font-size: 12pt;
  line-height: 1.78;
  color: var(--dark);
  background-color: #ffffff !important;
  max-width: var(--page-width);
  margin: 0 auto;
  padding: 0 64px 80px;
  border-top: 3px solid var(--accent);
}

/* ── NAV ── */
.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 72px;
  font-family: 'Inter', sans-serif;
  font-size: 8pt;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light);
}
.site-nav a { color: var(--mid); text-decoration: none; }
.site-nav a:hover { color: var(--black); }

/* ── LANDING HERO ── */
.landing-hero {
  background: var(--accent);
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  margin-bottom: 72px;
  padding: 72px calc(50vw - 50% + 64px) 80px;
  position: relative;
  overflow: hidden;
}

.landing-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.landing-hero::after {
  content: 'DCDD';
  position: absolute;
  right: 48px;
  bottom: -28px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 140pt;
  font-weight: 500;
  color: rgba(255,255,255,0.045);
  line-height: 1;
  letter-spacing: -4px;
  pointer-events: none;
  user-select: none;
}

.hero-kicker {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 8pt;
  color: rgba(255,255,255,0.42);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.hero-title-text {
  font-family: 'Libre Baskerville', serif;
  font-size: 54pt;
  font-weight: 700;
  line-height: 1.07;
  letter-spacing: -1.5px;
  color: #ffffff;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.hero-rule {
  width: 40px;
  height: 1px;
  background: rgba(255,255,255,0.3);
  margin-bottom: 22px;
  position: relative;
  z-index: 1;
}

.hero-tagline {
  font-family: 'Libre Baskerville', serif;
  font-size: 12pt;
  line-height: 1.72;
  color: rgba(255,255,255,0.66);
  max-width: 560px;
  margin-bottom: 0;
  text-align: left;
  position: relative;
  z-index: 1;
}

/* ── LANDING BODY ── */
.landing-body {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 80px;
  margin-bottom: 72px;
}

.landing-excerpt {
  font-size: 12pt;
  line-height: 1.75;
  color: var(--mid);
  margin-bottom: 16px;
  text-align: left;
}

.landing-excerpt-sub {
  font-family: 'Inter', sans-serif;
  font-size: 8.5pt;
  color: var(--light);
  letter-spacing: 0.05em;
  margin-bottom: 0;
  text-align: left;
}

.versions-label {
  font-family: 'Inter', sans-serif;
  font-size: 9pt;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 16px;
}

.version-row {
  display: grid;
  grid-template-columns: 48px 1fr auto auto;
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.version-row:first-of-type { border-top: 1px solid var(--border); }

.version-num {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11pt;
  font-weight: 500;
  color: var(--black);
}

.version-title {
  font-family: 'Inter', sans-serif;
  font-size: 11pt;
  color: var(--dark);
  line-height: 1.4;
}

.version-date {
  font-family: 'Inter', sans-serif;
  font-size: 9pt;
  color: var(--light);
  white-space: nowrap;
}

.version-status {
  font-family: 'Inter', sans-serif;
  font-size: 7pt;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 2px;
  white-space: nowrap;
}

.status-published { background: var(--green-bg); color: var(--green); }
.status-wip { background: var(--amber-bg); color: var(--amber); }

a.version-row {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}
a.version-row:hover { background: #fafaf8; }
a.version-row:hover .version-title { text-decoration: underline; }

.landing-footer {
  font-family: 'Inter', sans-serif;
  font-size: 8.5pt;
  color: var(--light);
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.landing-footer a { color: var(--mid); text-decoration: none; }

/* ── PAPER HEADER ── */
.paper-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 64px;
  font-family: 'Inter', sans-serif;
  font-size: 8pt;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light);
}
.paper-nav a { color: var(--mid); text-decoration: none; }
.paper-nav a:hover { color: var(--black); }

.paper-title-block {
  padding-bottom: 40px;
  margin-bottom: 48px;
  border-bottom: 2px solid var(--black);
}

h1 {
  font-family: 'Libre Baskerville', serif;
  font-size: 32pt;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.5px;
  color: var(--black);
  margin-bottom: 10px;
}

.paper-english {
  font-family: 'Inter', sans-serif;
  font-size: 8.5pt;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--light);
  margin-bottom: 8px;
}

.paper-subtitle {
  font-family: 'Libre Baskerville', serif;
  font-size: 13pt;
  font-style: italic;
  color: var(--mid);
  margin-bottom: 20px;
}

.paper-meta {
  font-family: 'Inter', sans-serif;
  font-size: 8pt;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--light);
}

/* ── PAPER BODY ── */
.paper-body {}

/* ── PAPER CONTENT ── */
h2 {
  font-family: 'Libre Baskerville', serif;
  font-size: 16pt;
  font-weight: 700;
  color: var(--black);
  margin-top: 56px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-family: 'Libre Baskerville', serif;
  font-size: 12pt;
  font-weight: 700;
  color: var(--dark);
  margin-top: 32px;
  margin-bottom: 12px;
}

p { margin-bottom: 16px; text-align: justify; hyphens: auto; }

strong { font-weight: 700; color: var(--black); }
em { font-style: italic; }

code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9pt;
  background: var(--bg-code);
  padding: 1px 5px;
  border-radius: 2px;
}

pre {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9pt;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 16px 20px;
  margin: 20px 0;
  overflow-x: auto;
  line-height: 1.65;
  white-space: pre;
}

blockquote {
  border-left: 2px solid var(--mid);
  margin: 24px 0;
  padding: 10px 24px;
  color: var(--mid);
  font-style: italic;
}
blockquote p { margin-bottom: 0; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

.opening-note {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  margin-bottom: 36px;
  font-family: 'Libre Baskerville', serif;
  font-size: 11pt;
  line-height: 1.8;
  color: var(--mid);
}
.opening-note p { margin-bottom: 12px; text-align: left; }
.opening-note p:last-child { margin-bottom: 0; }

.abstract {
  background: var(--bg-subtle);
  border-left: 3px solid var(--black);
  padding: 20px 24px;
  margin-bottom: 36px;
}

.abstract-label {
  font-family: 'Inter', sans-serif;
  font-size: 8pt;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--light);
  margin-bottom: 12px;
}

.definition-box {
  border: 1.5px solid var(--black);
  border-radius: 2px;
  padding: 20px 24px;
  margin-bottom: 40px;
}

.definition-label {
  font-family: 'Inter', sans-serif;
  font-size: 8pt;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--black);
  margin-bottom: 12px;
}

.definition-text {
  font-size: 11pt;
  line-height: 1.8;
  color: var(--dark);
  margin-bottom: 10px;
  text-align: justify;
}

.pull-quote {
  font-size: 13pt;
  font-style: italic;
  line-height: 1.55;
  color: var(--black);
  border-top: 2px solid var(--black);
  border-bottom: 1px solid var(--border);
  padding: 18px 0 16px;
  margin: 32px 0;
}

.option-block {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 14px 18px;
  margin-bottom: 10px;
}

.option-label {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 9pt;
  color: var(--black);
  margin-bottom: 6px;
}

.ref-section-label {
  font-family: 'Inter', sans-serif;
  font-size: 9pt;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mid);
  margin-top: 28px;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.references { margin-bottom: 8px; }

.ref-item {
  font-family: 'Inter', sans-serif;
  font-size: 11pt;
  color: var(--mid);
  padding: 10px 0;
  border-bottom: 1px solid #f0f0ec;
  line-height: 1.65;
}
.ref-item strong { color: var(--dark); font-weight: 600; }
.ref-item a { color: var(--accent); text-decoration: none; }
.ref-item a:hover { text-decoration: underline; }

.tool-entry {
  font-family: 'Inter', sans-serif;
  font-size: 11pt;
  color: var(--mid);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.65;
}
.tool-name { font-weight: 600; color: var(--dark); }

.timeline {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 8pt;
  background: var(--bg-code);
  border: 1px solid var(--border);
  padding: 14px 18px;
  margin: 16px 0;
  line-height: 1.8;
  white-space: pre;
  overflow-x: auto;
}

.paper-footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-family: 'Inter', sans-serif;
  font-size: 8.5pt;
  color: var(--light);
  display: flex;
  justify-content: space-between;
}
.paper-footer a { color: var(--mid); text-decoration: none; }

.v02-preview {
  background: var(--bg-subtle);
  border-left: 3px solid var(--accent);
  padding: 24px 28px;
  margin: 32px 0;
}
.v02-label {
  font-family: 'Inter', sans-serif;
  font-size: 7pt;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

/* ── RESPONSIVE ── */
@media (max-width: 800px) {
  body { padding: 0 24px 60px; }
  .landing-hero { padding-top: 48px; padding-bottom: 56px; }
  .landing-hero::after { font-size: 80pt; right: 16px; }
  .hero-title-text { font-size: 32pt; letter-spacing: -0.5px; }
  .landing-body { grid-template-columns: 1fr; gap: 40px; }
  h1 { font-size: 22pt; }
  .version-date { display: none; }
}