:root {
  --bg: #0d1110;
  --bg-2: #141b18;
  --panel: #18221d;
  --panel-2: #101613;
  --ink: #f2f0df;
  --muted: #b8b5a3;
  --soft: #d9d2a3;
  --accent: #9ef08f;
  --accent-2: #ffd36a;
  --line: rgba(242, 240, 223, 0.15);
  --shadow: rgba(0, 0, 0, 0.35);
  --paper: #e8dfb7;
  --paper-ink: #1c2019;
  --danger: #ff9c8a;
  --link: #b6ffac;
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(158, 240, 143, 0.08), transparent 32rem),
    linear-gradient(180deg, var(--bg), #090c0b 62%, #080909);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.62;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: linear-gradient(rgba(255,255,255,.8) 1px, transparent 1px);
  background-size: 100% 3px;
  z-index: 1;
}

body > * { position: relative; z-index: 2; }

a { color: var(--link); }
a:hover, a:focus { color: var(--accent-2); }

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

.site-header {
  padding: 4.25rem 0 3.25rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(158, 240, 143, 0.08), rgba(255, 211, 106, 0.05)),
    rgba(13, 17, 16, 0.86);
}

.compact-header { padding: 3rem 0 2.25rem; }

.header-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.45fr);
  gap: 1.5rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1, h2, h3 {
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

h1 {
  font-size: clamp(2.5rem, 7vw, 5.9rem);
  letter-spacing: -0.07em;
}

h2 { font-size: clamp(1.55rem, 2.8vw, 2.25rem); }
h3 { font-size: 1.2rem; color: var(--soft); }

.standfirst {
  max-width: 60rem;
  margin: 0;
  color: var(--soft);
  font-size: clamp(1.05rem, 2.2vw, 1.32rem);
}

.header-card,
.fact-card,
.timeline-card,
.content-grid article,
.personal-note,
.source-box,
.callout-split > div,
.diagram-card,
.card-links article,
.article-page .table-wrap,
.article-page .timeline,
.code-card {
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: rgba(20, 27, 24, 0.72);
  box-shadow: 0 1rem 3rem var(--shadow);
}

.header-card { padding: 1.25rem; }
.header-card strong, .header-card span { display: block; }
.header-card strong {
  margin-bottom: 0.35rem;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.header-card span, .small-note { color: var(--muted); font-size: 0.92rem; }

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(13, 17, 16, 0.94);
  backdrop-filter: blur(10px);
}

.nav-inner {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  padding: 0.55rem 0;
}

.nav-inner a {
  flex: 0 0 auto;
  border-radius: 999px;
  color: var(--ink);
  padding: 0.45rem 0.8rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-inner a:hover,
.nav-inner a:focus,
.nav-inner a.active { background: rgba(158, 240, 143, 0.13); }

.intro-section,
.content-grid,
.history-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(260px, 0.8fr);
  gap: 1.25rem;
  padding: 3rem 0;
}

.fact-card, .timeline-card, .content-grid article, .personal-note, .source-box, .card-links article {
  padding: 1.35rem;
}

.fact-card {
  background: var(--paper);
  color: var(--paper-ink);
}
.fact-card h2 { color: var(--paper-ink); }
.fact-card pre {
  padding: 1rem;
  overflow: auto;
  border-radius: 0.7rem;
  background: rgba(28, 32, 25, 0.1);
}

.console-section {
  padding: 3rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(158, 240, 143, 0.06), transparent 40%),
    rgba(0,0,0,0.18);
}

.section-title-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  margin-bottom: 1.25rem;
}

.console-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.ad-column { min-width: 0; }
.ad-label {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.ad-slot { width: 320px; max-width: 100%; min-height: 50px; }
.ad-banner {
  width: 100%;
  margin: 2.7rem auto;
  text-align: center;
}
.ad-banner-slot {
  width: min(728px, 100%);
  min-height: 90px;
  margin: 0 auto;
}
.console-panel {
  overflow: hidden;
  border: 1px solid rgba(158, 240, 143, 0.3);
  border-radius: 1rem;
  background: #050806;
  box-shadow: 0 1.5rem 4rem rgba(0,0,0,0.45);
}
.screen-bar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid rgba(158, 240, 143, 0.3);
  color: var(--accent-2);
  font: 700 0.82rem/1.2 "Courier New", Courier, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.screen {
  height: 430px;
  overflow-y: auto;
  padding: 1rem;
  color: var(--accent);
  background:
    radial-gradient(circle at center, rgba(158, 240, 143, 0.08), transparent 24rem),
    #020403;
  font: 1rem/1.45 "Courier New", Courier, monospace;
}
.line { white-space: pre-wrap; overflow-wrap: anywhere; }
.line.system { color: var(--accent-2); }
.line.error { color: var(--danger); }
.line.command { color: #c6ffc0; opacity: 0.82; }
.command-form {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.5rem;
  align-items: center;
  padding: 0.8rem;
  border-top: 1px solid rgba(158, 240, 143, 0.22);
  background: #08100b;
}
.prompt { color: var(--accent-2); font: 700 1.1rem "Courier New", Courier, monospace; }
.command-form input {
  min-width: 0;
  border: 1px solid rgba(158, 240, 143, 0.3);
  border-radius: 0.6rem;
  padding: 0.7rem 0.8rem;
  color: var(--accent);
  background: #020403;
  font: 1rem "Courier New", Courier, monospace;
}
button {
  border: 1px solid rgba(158, 240, 143, 0.35);
  border-radius: 0.6rem;
  padding: 0.65rem 0.85rem;
  color: var(--ink);
  background: rgba(158, 240, 143, 0.08);
  cursor: pointer;
}
button:hover, button:focus { background: rgba(158, 240, 143, 0.18); }
.console-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding: 0.8rem;
  border-top: 1px solid rgba(158, 240, 143, 0.14);
  background: rgba(8, 16, 11, 0.82);
}

.history-section {
  padding: 3rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 211, 106, 0.04);
}
.timeline-card ol { padding-left: 1.25rem; }
.timeline-card li + li { margin-top: 0.75rem; }

.card-links { padding: 3rem 0; }
.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}
.link-grid a {
  display: block;
  min-height: 8rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: rgba(0,0,0,0.18);
  color: var(--ink);
  text-decoration: none;
}
.link-grid a:hover { border-color: rgba(158,240,143,0.5); transform: translateY(-1px); }
.link-grid strong { display: block; margin-bottom: 0.45rem; color: var(--accent-2); }
.link-grid span { color: var(--muted); }

.article-page {
  max-width: 920px;
  padding: 3rem 0 4rem;
}
.article-page p, .article-page li { font-size: 1.04rem; }
.article-page h2 { margin-top: 2.2rem; }
.article-page > h2:first-child { margin-top: 0; }
.article-page ul, .article-page ol { padding-left: 1.4rem; }
.article-page li + li { margin-top: 0.55rem; }

.callout-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}
.callout-split > div { padding: 1.2rem; }

.code-card {
  display: block;
  overflow-x: auto;
  padding: 1rem;
  color: var(--accent);
  background: #020403;
  font: 0.95rem/1.45 "Courier New", Courier, monospace;
}
.steps {
  counter-reset: step;
  list-style: none;
  padding-left: 0 !important;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0.8rem 0.8rem 0.8rem 3.1rem;
  border-bottom: 1px solid var(--line);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.75rem;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  background: rgba(158, 240, 143, 0.15);
  color: var(--accent-2);
  font-weight: 700;
}

.diagram-card { padding: 1.25rem; margin: 2rem 0; }
.tree-diagram { max-width: 680px; margin: 1rem auto 0; text-align: center; }
.node {
  display: inline-block;
  min-width: 150px;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(158,240,143,0.35);
  border-radius: 0.8rem;
  background: rgba(0,0,0,0.24);
}
.node.question { color: var(--accent-2); }
.node.animal { color: var(--accent); }
.branch-row, .leaf-row {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin: 0.65rem 0;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}
.branch-row.right, .leaf-row.right { margin-left: 12rem; gap: 2rem; }

.table-wrap { overflow-x: auto; margin: 2rem 0; }
table { width: 100%; border-collapse: collapse; min-width: 680px; }
th, td { padding: 0.85rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--accent-2); }

.source-box { margin-top: 2rem; }
.references-section { padding: 3rem 0; background: rgba(0,0,0,0.18); }
.references-list, .source-box ul { padding-left: 1.2rem; }

.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: rgba(0,0,0,0.26);
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

kbd, code {
  border: 1px solid rgba(158,240,143,0.25);
  border-radius: 0.35rem;
  padding: 0.08rem 0.32rem;
  background: rgba(0,0,0,0.22);
  color: var(--accent-2);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 860px) {
  .header-grid,
  .intro-section,
  .content-grid,
  .history-grid,
  .console-layout,
  .callout-split { grid-template-columns: 1fr; }
  .section-title-row { display: block; }
  .ad-slot { width: 320px; }
  .link-grid { grid-template-columns: 1fr; }
  .branch-row.right, .leaf-row.right { margin-left: 0; }
}

@media (max-width: 520px) {
  .wrap { width: min(100% - 1rem, var(--max)); }
  .site-header { padding: 2.5rem 0 2rem; }
  .screen { height: 380px; font-size: 0.9rem; }
  .command-form { grid-template-columns: auto minmax(0, 1fr); }
  .command-form button { grid-column: 1 / -1; }
  .ad-slot { width: 100%; }
  .branch-row, .leaf-row { gap: 1rem; }
  .node { min-width: 120px; }
}

/* Homepage fit pass: keep the console visible sooner on typical laptop screens. */
.home-page .compact-header {
  padding: 1.35rem 0 1.05rem;
}
.home-page h1 {
  font-size: clamp(2.15rem, 5vw, 4.1rem);
}
.home-page .standfirst {
  max-width: 54rem;
  font-size: clamp(0.98rem, 1.7vw, 1.16rem);
}
.home-page .header-card {
  padding: 0.85rem 1rem;
}
.compact-intro {
  align-items: stretch;
  padding: 1rem 0;
}
.compact-intro .intro-copy,
.compact-intro .starter-strip {
  min-height: auto;
}
.compact-intro h2 {
  margin-bottom: 0.35rem;
  font-size: clamp(1.2rem, 2.1vw, 1.55rem);
}
.compact-intro p {
  margin: 0;
}
.starter-strip {
  display: flex;
  align-items: center;
  padding: 0.9rem 1rem;
}
.starter-strip span {
  display: inline-block;
  margin-left: 0.65rem;
  white-space: nowrap;
}
.home-page .console-section {
  padding: 1rem 0 2.25rem;
}
.home-page .section-title-row {
  margin-bottom: 0.75rem;
}
.home-page .section-title-row h2 {
  margin-bottom: 0.15rem;
}
.ad-column {
  padding-top: 0.1rem;
}
.ad-banner {
  min-height: 90px;
}

@media (max-width: 860px) {
  .starter-strip span { display: block; margin-left: 0; }
}