/* neomagic.ai — Singularity Intel Editorial Brass & Obsidian + neomagic Lab Cockpit
   Zero external font requests; native editorial serif + high-contrast geometric sans + monospace. */

:root,
html[data-theme="dark"] {
  --paper: #0f1012;
  --paper-deep: #151619;
  --surface: #1a1c20;
  --surface-elevated: #212429;
  --ink: #f5f0e6;
  --prose: #dcd6cb;
  --soft: #a8a297;
  --muted: #7c776e;
  --line: #2b2926;
  --line-strong: rgba(208, 161, 84, 0.36);
  --gold: #d0a154;
  --gold-ink: #dfb86f;
  --gold-soft: rgba(208, 161, 84, 0.12);
  --cyan: #24c8db;
  --emerald: #2fd6a0;
  --violet: #9d7bf5;
  --amber: #f5a623;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.42);
  --display: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  --ui: var(--display);
  --serif: Georgia, "Times New Roman", Times, serif;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, ui-monospace, monospace;
  color-scheme: dark;
}

html[data-theme="light"] {
  --paper: #f4f0e8;
  --paper-deep: #ebe4d8;
  --surface: #fffdf8;
  --surface-elevated: #f9f5ec;
  --ink: #101718;
  --prose: #26302f;
  --soft: #4d5756;
  --muted: #5f6a68;
  --line: #d5cec2;
  --line-strong: rgba(184, 137, 63, 0.48);
  --gold: #b8893f;
  --gold-ink: #77531c;
  --gold-soft: #f4e7ce;
  --cyan: #0b7a8a;
  --emerald: #137a57;
  --violet: #5b3ec8;
  --amber: #b36b00;
  --shadow: 0 14px 36px rgba(16, 23, 24, 0.08);
  color-scheme: light;
}

html[data-theme="neomagic"] {
  --paper: #05070b;
  --paper-deep: #090d14;
  --surface: #0d131d;
  --surface-elevated: #121b28;
  --ink: #eef4ff;
  --prose: #c9d5e8;
  --soft: #8fa1bd;
  --muted: #5d708f;
  --line: #1c293d;
  --line-strong: rgba(36, 200, 219, 0.45);
  --gold: #24c8db;
  --gold-ink: #5ce1f0;
  --gold-soft: rgba(36, 200, 219, 0.12);
  --shadow: 0 20px 56px rgba(0, 0, 0, 0.65);
  color-scheme: dark;
}

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

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.18s ease, color 0.18s ease;
}

a {
  color: inherit;
  text-decoration-color: var(--gold);
  text-underline-offset: 4px;
}

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

.wrap {
  width: min(1140px, calc(100% - 48px));
  margin-inline: auto;
}

@media (max-width: 640px) {
  .wrap {
    width: calc(100% - 32px);
  }
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--line-strong);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(10px);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding-block: 10px;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-family: var(--display);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: 800 15px/1 var(--display);
  letter-spacing: -0.04em;
  text-transform: lowercase;
}

.brand-name {
  font: 800 22px/1 var(--display);
  letter-spacing: -0.03em;
  text-transform: lowercase;
  color: var(--ink);
}

.nm-word {
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-transform: lowercase;
}

.nm-neo {
  color: var(--gold);
}

.nm-magic {
  color: var(--ink);
}

.brand-badge {
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--gold-soft);
  color: var(--gold-ink);
  border: 1px solid var(--line-strong);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  font-family: var(--ui);
}

.site-nav a {
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--soft);
  transition: color 0.15s ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 6px;
  text-decoration-thickness: 2px;
}

.theme-switcher {
  display: inline-flex;
  align-items: center;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}

.theme-btn {
  border: 0;
  background: transparent;
  color: var(--soft);
  font: 600 11px/1 var(--mono);
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.theme-btn:hover {
  color: var(--ink);
}

.theme-btn.active {
  background: var(--surface);
  color: var(--gold-ink);
  box-shadow: 0 1px 4px rgba(0,0,0,0.18);
}

/* Hero */
.hero {
  padding: clamp(44px, 7vw, 84px) 0 clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
}

.kicker {
  margin: 0 0 14px;
  font: 800 12px/1.3 var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-ink);
}

.hero h1 {
  margin: 0 0 18px;
  font: 800 clamp(36px, 5.6vw, 64px)/1.05 var(--display);
  letter-spacing: -0.035em;
  color: var(--ink);
  max-width: 18ch;
}

.hero-lead {
  margin: 0 0 24px;
  font: 400 clamp(19px, 2.3vw, 24px)/1.5 var(--serif);
  color: var(--prose);
  max-width: 62ch;
}

.clarke-epigraph {
  margin: 26px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font: italic 15px/1.5 var(--serif);
  color: var(--soft);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.clarke-epigraph span.cite {
  font: 600 12px/1.2 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gold-ink);
  font-style: normal;
}

.cta-row {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: 10px;
  font: 700 14px/1.1 var(--ui);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--gold);
  color: #0f1012;
  border: 1px solid var(--gold);
}

.btn-primary:hover {
  color: #0f1012;
  filter: brightness(1.07);
}

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line-strong);
}

.btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold-ink);
}

/* Flagship Showcase Card */
.section {
  padding: clamp(40px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--line);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.section-title {
  margin: 0;
  font: 800 clamp(24px, 3.2vw, 34px)/1.12 var(--display);
  letter-spacing: -0.025em;
  color: var(--ink);
}

.showcase-card {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  padding: clamp(22px, 4vw, 38px);
  box-shadow: var(--shadow);
}

.showcase-top {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: start;
  margin-bottom: 28px;
}

@media (max-width: 900px) {
  .showcase-top {
    grid-template-columns: 1fr;
  }
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.pill {
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--paper-deep);
  color: var(--prose);
  border: 1px solid var(--line);
}

.pill.gold {
  background: var(--gold-soft);
  color: var(--gold-ink);
  border-color: var(--line-strong);
}

.showcase-card h3 {
  margin: 0 0 12px;
  font: 800 clamp(26px, 3.5vw, 38px)/1.08 var(--display);
  letter-spacing: -0.03em;
}

.showcase-card p.lead {
  margin: 0 0 18px;
  font-size: 18px;
  color: var(--prose);
}

.feature-bullets {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  display: grid;
  gap: 10px;
  font-family: var(--ui);
  font-size: 14px;
  color: var(--prose);
}

.feature-bullets li {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.feature-bullets li strong {
  color: var(--ink);
}

.bullet-dot {
  color: var(--gold-ink);
  font-family: var(--mono);
  font-weight: 700;
}

.visual-frame {
  background: #080a0e;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.visual-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.visual-caption {
  padding: 10px 14px;
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
  font: 600 12px/1.4 var(--mono);
  color: var(--soft);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* Interactive 4-Column Lap Relay Explorer */
.lap-explorer {
  margin-top: 28px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.lap-explorer-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.lap-explorer-title {
  font: 800 13px/1.2 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-ink);
  margin: 0;
}

.lap-slots {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

@media (max-width: 860px) {
  .lap-slots {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .lap-slots {
    grid-template-columns: 1fr;
  }
}

.slot-card {
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: var(--ui);
  color: var(--ink);
}

.slot-card:hover {
  border-color: var(--gold);
  transform: translateY(-1px);
}

.slot-card.active {
  background: var(--surface-elevated);
  border-color: var(--gold);
  box-shadow: 0 0 0 1px var(--gold);
}

.slot-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font: 700 11px/1 var(--mono);
}

.slot-role {
  color: var(--gold-ink);
  letter-spacing: 0.06em;
}

.slot-access {
  padding: 3px 6px;
  border-radius: 4px;
  background: var(--paper-deep);
  color: var(--soft);
  font-size: 10px;
}

.slot-access.writer {
  background: rgba(47, 214, 160, 0.14);
  color: var(--emerald);
  border: 1px solid rgba(47, 214, 160, 0.35);
}

.slot-harness {
  font: 800 15px/1.25 var(--display);
  margin-bottom: 4px;
}

.slot-baton {
  font: 600 12px/1.35 var(--mono);
  color: var(--soft);
  margin-bottom: 10px;
}

.quota-bar {
  height: 5px;
  background: var(--paper-deep);
  border-radius: 999px;
  overflow: hidden;
}

.quota-fill {
  height: 100%;
  border-radius: 999px;
}

.baton-inspector {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  color: var(--prose);
}

.baton-inspector-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  color: var(--gold-ink);
}

.baton-code {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12.5px;
}

/* 3 Engineering Principles Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

@media (max-width: 860px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
}

.card-kicker {
  font: 700 11px/1 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-ink);
  margin: 0 0 10px;
}

.card h3 {
  margin: 0 0 10px;
  font: 800 19px/1.25 var(--display);
  color: var(--ink);
}

.card p {
  margin: 0;
  font-size: 16px;
  color: var(--prose);
}

/* Comparison Table & Code Blocks */
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--ui);
  font-size: 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.compare-table th,
.compare-table td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.compare-table th {
  font: 800 12px/1.2 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gold-ink);
  background: var(--paper-deep);
}

.compare-table tr:last-child td {
  border-bottom: 0;
}

.code-panel {
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  position: relative;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--surface);
  color: var(--gold-ink);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 5px 10px;
  font: 600 11px/1 var(--mono);
  cursor: pointer;
}

.copy-btn:hover {
  border-color: var(--gold);
}

/* Video Walkthrough Box */
.video-stage {
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.video-screen {
  position: relative;
  background: #07090d;
  border-bottom: 1px solid var(--line);
}

.video-screen img {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.92;
}

.video-overlay-bar {
  padding: 16px 20px;
  background: var(--surface-elevated);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.chapter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 20px;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.chapter-btn {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--prose);
  border-radius: 8px;
  padding: 8px 12px;
  font: 600 12px/1.2 var(--mono);
  cursor: pointer;
  transition: all 0.15s ease;
}

.chapter-btn:hover,
.chapter-btn.active {
  border-color: var(--gold);
  color: var(--gold-ink);
  background: var(--gold-soft);
}

.chapter-caption {
  padding: 14px 20px;
  font-family: var(--ui);
  font-size: 14px;
  color: var(--prose);
  background: var(--surface);
  border-top: 1px solid var(--line);
}

/* About Block */
.about-box {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: clamp(24px, 4vw, 36px);
}

.about-box p {
  margin: 0 0 18px;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--prose);
  max-width: 68ch;
}

.link-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font: 600 14px/1.3 var(--ui);
}

/* Footer */
.site-footer {
  padding: 38px 0 52px;
  font-family: var(--ui);
  color: var(--soft);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-epigraph {
  font: italic 14px/1.5 var(--serif);
  color: var(--soft);
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.trademark-note {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

/* Legal Prose */
.legal-prose {
  max-width: 720px;
  padding: 48px 0 72px;
  font-family: var(--serif);
}

.legal-prose h1 {
  font: 800 clamp(30px, 4vw, 44px)/1.1 var(--display);
  margin: 0 0 24px;
}

.legal-prose h2 {
  font: 800 20px/1.25 var(--display);
  margin: 32px 0 10px;
}

.legal-prose p {
  color: var(--prose);
  margin: 0 0 14px;
}