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

:root {
  --bg: #0c0a0e;
  --surface: #14111c;
  --border: #1e1a28;
  --text: #b8b0a4;
  --text-dim: #605a52;
  --gold: #c49a2c;
  --gold-bright: #d4aa3c;
  --gold-dim: #7a6420;
  --pink: #d4789b;
  --blue: #7b9fbd;
  --orange: #c49450;
  --green: #7b9b7b;
  --cyan: #6b9b9b;
  --rose: #c47a8c;
  --mono: 'SF Mono', 'Cascadia Code', 'JetBrains Mono', 'Fira Code', 'Menlo', 'Consolas', 'Liberation Mono', monospace;
  --serif: 'Iowan Old Style', 'Palatino Linotype', 'Palatino', 'Book Antiqua', 'Georgia', serif;
}

@keyframes reveal {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

html { font-size: 15px; scroll-behavior: smooth; }

body {
  font-family: var(--mono);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 50vh;
  background: radial-gradient(ellipse at 50% 0%, #14101c 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.page {
  max-width: 620px;
  margin: 0 auto;
  padding: 4rem 1.5rem 5rem;
  animation: reveal 0.5s ease-out;
}

/* ── Masthead ── */

.masthead {
  text-align: center;
  margin-bottom: 2rem;
}

.masthead img {
  width: 88px;
  height: 88px;
  border-radius: 18px;
}

.masthead .wordmark {
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 400;
  color: var(--gold);
  letter-spacing: 0.14em;
  font-variant: small-caps;
  margin-top: 1rem;
  text-shadow: 0 0 28px rgba(196, 154, 44, 0.15);
}

.masthead .tagline {
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 0.2rem;
}

/* ── Rules ── */

hr {
  border: none;
  border-top: 1px solid var(--gold-dim);
  margin: 2.5rem 0;
}

hr.subtle {
  border-color: var(--border);
}

/* ── Meta block ── */

.meta {
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 2;
  margin-bottom: 0.5rem;
}

.meta .row {
  display: flex;
}

.meta .label {
  width: 12ch;
  flex-shrink: 0;
}

.meta .value {
  color: var(--text);
}

/* ── Abstract / Hero ── */

.abstract {
  margin: 2.5rem 0;
}

.abstract h2 {
  font-family: var(--serif);
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--gold-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.abstract .lead {
  font-family: var(--serif);
  font-size: 1.15rem;
  color: var(--text);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.abstract p {
  font-size: 0.82rem;
  line-height: 1.75;
}

/* ── Sections ── */

.section {
  margin-bottom: 2.5rem;
}

.section-id {
  font-size: 0.65rem;
  color: var(--gold-dim);
  letter-spacing: 0.08em;
  margin-bottom: 0.15rem;
}

.section h2 {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--gold);
  margin-bottom: 0.75rem;
  line-height: 1.4;
  text-shadow: 0 0 24px rgba(196, 154, 44, 0.12);
}

.section p {
  font-size: 0.82rem;
  margin-bottom: 0.75rem;
}

.section p:last-child {
  margin-bottom: 0;
}

.section .aside {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-style: italic;
}

/* ── Section images ── */

.section:has(> img) {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0 1.5rem;
  align-items: start;
}

.section:has(> img) > *:not(img) {
  grid-column: 1;
}

.section > img {
  grid-column: 2;
  grid-row: 1 / span 10;
  align-self: center;
  max-height: 300px;
  width: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.section > img:hover {
  border-color: var(--gold-dim);
}

/* ── Lightbox ── */

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.92);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  width: auto;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}

/* ── Code blocks ── */

pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 2px solid var(--gold-dim);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.65;
  margin: 1.25rem 0;
  border-radius: 2px;
}

code { font-family: var(--mono); }

code.il {
  background: var(--surface);
  padding: 0.1em 0.35em;
  border-radius: 2px;
  font-size: 0.88em;
  border: 1px solid var(--border);
}

/* Syntax tokens */
.t-m  { color: var(--pink); font-weight: 600; }
.t-u  { color: var(--blue); }
.t-hn { color: var(--orange); }
.t-hv { color: var(--text-dim); }
.t-k  { color: var(--blue); }
.t-s  { color: var(--green); }
.t-n  { color: var(--rose); }

/* ── Lists ── */

ul { list-style: none; padding: 0; margin: 0.5rem 0; }

ul li {
  font-size: 0.82rem;
  padding: 0.15rem 0 0.15rem 1.5rem;
  position: relative;
}

ul li::before {
  content: '\2014';
  color: var(--gold-dim);
  position: absolute;
  left: 0;
}

/* ── Ornament ── */

.ornament {
  text-align: center;
  color: var(--gold-dim);
  margin: 3rem 0;
  font-size: 0.65rem;
  letter-spacing: 0.8em;
  text-shadow: 0 0 16px rgba(196, 154, 44, 0.2);
}

/* ── CTA ── */

.cta {
  text-align: center;
  margin: 2rem 0;
}

.cta a.badge {
  display: inline-block;
  transition: opacity 0.2s ease;
}

.cta a.badge:hover {
  opacity: 0.85;
}

.cta a.badge img {
  height: 44px;
  width: auto;
}

/* ── Links ── */

a {
  color: var(--gold);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover { color: var(--gold-bright); }

/* ── Footer ── */

footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.68rem;
  color: var(--text-dim);
}

footer nav {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

footer a {
  color: var(--text-dim);
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

footer a:hover {
  color: var(--gold);
  border-color: var(--gold-dim);
}

/* ── Doc pages (support, privacy) ── */

.backlink {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
  display: block;
}

.backlink:hover { color: var(--gold); }

.doc h1 {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--gold);
  margin-bottom: 1.5rem;
  letter-spacing: 0.03em;
  text-shadow: 0 0 24px rgba(196, 154, 44, 0.1);
}

.doc h2 {
  font-family: var(--serif);
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--gold);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.doc p {
  font-size: 0.82rem;
  margin-bottom: 0.75rem;
  line-height: 1.75;
}

.doc .effective {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

.doc a {
  border-bottom: 1px solid var(--gold-dim);
}

.doc a:hover { border-color: var(--gold); }

/* ── Responsive ── */

@media (max-width: 520px) {
  html { font-size: 14px; }
  .page { padding: 2.5rem 1.25rem 4rem; }
  .masthead img { width: 72px; height: 72px; border-radius: 15px; }
  .masthead .wordmark { font-size: 1.4rem; }
  pre { padding: 1rem; font-size: 0.75rem; }
  .section:has(> img) { display: block; }
  .section > img { display: block; max-height: 260px; margin: 1rem auto; }
}