:root {
  --bg: #0a0a0b;
  --bg2: #141416;
  --ink: #f2efe6;
  --muted: #8a8680;
  --accent: #e8a317;
  --accent-cool: #6ec8e8;
  --line: rgba(255, 255, 255, 0.08);
  --sans: "DM Sans", system-ui, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --wrap: min(1120px, calc(100% - 40px));
  --radius: 12px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(232, 163, 23, 0.08), transparent),
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
}

.wrap { width: var(--wrap); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0;
}
.skip:focus {
  left: 16px; top: 16px; z-index: 999;
  background: var(--accent); color: #000; padding: 8px 12px;
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(10, 10, 11, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 20px;
}

.logo {
  font-family: var(--serif);
  font-size: 1.35rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.logo-dot { color: var(--accent); }

.nav {
  display: flex; gap: 24px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}

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

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.9rem; font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  cursor: pointer;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  color: #0a0a0b;
}

.btn-primary:hover { background: #f0b030; }

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: transparent;
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.04);
}

/* Hero */
.hero {
  padding: clamp(48px, 8vw, 100px) 0 clamp(64px, 10vw, 120px);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.kicker {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.blink { animation: blink 1.2s step-end infinite; }

@keyframes blink {
  50% { opacity: 0; }
}

h1, h2 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  margin-bottom: 20px;
}

h1 em, h2 em {
  font-style: italic;
  color: var(--accent);
}

.lead {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: #cfcbc3;
  max-width: 36em;
  margin-bottom: 28px;
}

.lead strong { color: var(--ink); }

.hero-cta {
  display: flex; flex-wrap: wrap; gap: 12px;
  margin-bottom: 36px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.hero-stats dt {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.hero-stats dd {
  font-size: 0.85rem;
  color: #ddd9d0;
}

/* Terminal */
.hero-terminal {
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.term-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  background: rgba(0,0,0,0.35);
  border-bottom: 1px solid var(--line);
}

.term-bar span {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.12);
}

.term-bar span:first-child { background: #ff5f57; }
.term-bar span:nth-child(2) { background: #febc2e; }
.term-bar span:nth-child(3) { background: #28c840; }

.term-bar code {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.term-body {
  padding: 20px;
  font-family: var(--mono);
  font-size: 0.74rem;
  line-height: 1.65;
  overflow-x: auto;
  color: #c8c4bc;
}

.c-dim { color: #5c5954; }
.c-key { color: var(--accent-cool); }
.c-highlight { color: var(--accent); font-weight: 600; }

/* Sections */
.section {
  padding: clamp(64px, 9vw, 110px) 0;
  border-top: 1px solid var(--line);
}

.section-head { margin-bottom: 40px; }

.section-head h2 {
  font-size: clamp(1.9rem, 4vw, 3rem);
  margin-top: 8px;
}

.sub {
  color: var(--muted);
  margin-top: 12px;
  max-width: 32em;
}

/* Cards */
.card {
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.card h3, .card h4 {
  font-family: var(--serif);
  font-size: 1.35rem;
  margin-bottom: 12px;
  font-weight: 400;
}

.card p, .card li {
  color: #cfcbc3;
  font-size: 0.95rem;
}

.card-accent {
  border-color: rgba(232, 163, 23, 0.35);
  background: linear-gradient(180deg, rgba(232,163,23,0.06), var(--bg2));
}

.card-quote blockquote {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-style: italic;
  color: var(--accent);
  margin-bottom: 12px;
}

.note {
  margin-top: 12px;
  font-size: 0.85rem !important;
  color: var(--muted) !important;
}

.thesis-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.check-list {
  list-style: none;
  display: flex; flex-direction: column; gap: 12px;
}

.check-list li::before {
  content: "→ ";
  color: var(--accent);
  font-family: var(--mono);
}

/* Surfaces */
.surface-layout {
  display: grid;
  gap: 20px;
}

.surface-tabs {
  display: flex; flex-wrap: wrap; gap: 8px;
}

.surface-tab {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
}

.surface-tab:hover {
  border-color: rgba(255,255,255,0.18);
  color: var(--ink);
}

.surface-tab[aria-selected="true"] {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.2);
  color: var(--ink);
}

.surface-tab.is-fifth[aria-selected="true"] {
  background: rgba(110, 200, 232, 0.12);
  border-color: rgba(110, 200, 232, 0.45);
  color: var(--accent-cool);
}

.surface-panel {
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 36px);
  min-height: 220px;
}

.surface-content { display: none; }
.surface-content.is-active { display: block; }

.surface-content h3 {
  font-family: var(--serif);
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.surface-content p, .surface-content li {
  color: #cfcbc3;
  margin-bottom: 10px;
}

.surface-content ul {
  margin: 12px 0 0 18px;
}

.surface-content code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: rgba(255,255,255,0.06);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent-cool);
}

/* Work */
.flagship {
  background: linear-gradient(135deg, rgba(232,163,23,0.08), transparent 50%), var(--bg2);
  border: 1px solid rgba(232, 163, 23, 0.25);
  border-radius: calc(var(--radius) + 4px);
  padding: clamp(28px, 4vw, 40px);
  margin-bottom: 24px;
}

.flagship h3 {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 12px 0 16px;
}

.flagship p { color: #cfcbc3; max-width: 52em; }

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  color: var(--muted);
  margin-right: 8px;
}

.tag-live {
  background: rgba(40, 200, 64, 0.12);
  color: #5de87a;
}

.flagship-metrics {
  display: flex; flex-wrap: wrap; gap: 28px;
  margin: 24px 0;
  padding: 20px 0;
  border-block: 1px solid var(--line);
}

.flagship-metrics strong {
  display: block;
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
}

.flagship-metrics span {
  font-size: 0.8rem;
  color: var(--muted);
}

.flagship-bullets {
  list-style: none;
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: 16px;
}

.flagship-bullets li {
  color: #cfcbc3;
  font-size: 0.92rem;
  padding-left: 14px;
  position: relative;
}

.flagship-bullets li::before {
  content: "·";
  position: absolute; left: 0;
  color: var(--accent);
  font-weight: 700;
}

.text-link {
  color: var(--accent-cool);
  font-family: var(--mono);
  font-size: 0.85rem;
  text-decoration: none;
}

.text-link:hover { text-decoration: underline; }

.work-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* Lab */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.lab-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: border-color 0.15s, transform 0.15s;
}

.lab-card:hover {
  border-color: rgba(232, 163, 23, 0.35);
  transform: translateY(-2px);
}

.lab-card-static { cursor: default; }
.lab-card-static:hover { transform: none; }

.lab-icon { font-size: 1.4rem; display: block; margin-bottom: 10px; }

.lab-card h4 {
  font-family: var(--serif);
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.lab-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.45;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: start;
}

.about p {
  color: #cfcbc3;
  margin-bottom: 14px;
  max-width: 40em;
}

.about-facts {
  list-style: none;
  margin: 20px 0 24px;
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--muted);
}

.about-facts li { margin-bottom: 6px; }

.writing-list {
  list-style: none;
  display: flex; flex-direction: column; gap: 10px;
}

.writing-list li {
  font-size: 0.9rem;
  color: #cfcbc3;
  padding-left: 14px;
  position: relative;
}

.writing-list li::before {
  content: "—";
  position: absolute; left: 0;
  color: var(--accent);
}

.about-aside h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin-bottom: 12px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-made { font-size: 0.75rem; color: #444; }

/* Responsive */
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  position: relative;
}

.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--ink);
  margin: 5px auto;
  transition: transform 0.2s;
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--line);
  background: rgba(10,10,11,0.95);
}

.mobile-nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 10px 0;
  font-size: 0.95rem;
  border-bottom: 1px solid var(--line);
}

.mobile-nav a:last-child { border-bottom: none; color: var(--accent); }

.mobile-nav.is-open { display: flex; }

/* Steering demo */
.steering-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
  align-items: start;
}

.steering-demo { padding: 0; overflow: hidden; }

.demo-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(0,0,0,0.25);
}

.demo-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  margin-right: auto;
}

.demo-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: rgba(110, 200, 232, 0.1);
  color: var(--accent-cool);
  cursor: pointer;
}

.demo-btn:hover { background: rgba(110, 200, 232, 0.18); }

.demo-btn-warn {
  background: rgba(232, 163, 23, 0.12);
  color: var(--accent);
  border-color: rgba(232, 163, 23, 0.3);
}

.demo-btn-ghost {
  background: transparent;
  color: var(--muted);
}

.demo-timeline {
  padding: 20px;
  display: flex; flex-direction: column; gap: 10px;
}

.demo-step {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.78rem;
}

.demo-step.is-done {
  opacity: 0.55;
  border-color: transparent;
  background: rgba(255,255,255,0.03);
}

.demo-step.is-running {
  border-color: rgba(110, 200, 232, 0.45);
  background: rgba(110, 200, 232, 0.08);
  animation: pulse 1.8s ease-in-out infinite;
}

.demo-step.is-pending { opacity: 0.35; }

.demo-step.is-cancelled {
  border-color: rgba(255, 95, 87, 0.45);
  background: rgba(255, 95, 87, 0.08);
  text-decoration: line-through;
  opacity: 0.7;
}

.demo-step.is-injected {
  border-color: rgba(232, 163, 23, 0.5);
  box-shadow: 0 0 0 1px rgba(232, 163, 23, 0.2);
}

.step-n { color: var(--muted); }
.step-t { color: #ddd9d0; }
.step-s {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.demo-step.is-running .step-s { color: var(--accent-cool); }

.demo-log {
  margin: 0;
  padding: 14px 20px 18px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  border-top: 1px solid var(--line);
  min-height: 52px;
}

.steering-notes {
  display: flex; flex-direction: column; gap: 12px;
}

.steering-notes .card h3 {
  font-family: var(--serif);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.steering-notes .card p {
  font-size: 0.88rem;
  color: #cfcbc3;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(110, 200, 232, 0); }
  50% { box-shadow: 0 0 0 4px rgba(110, 200, 232, 0.12); }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .nav { display: none; }
  .nav-toggle { display: block; }
  .header-cta { display: none; }
  .hero-grid, .thesis-grid, .work-grid, .lab-grid, .about-grid, .steering-layout {
    grid-template-columns: 1fr;
  }
  .hero-stats { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .blink { animation: none; }
  .btn, .lab-card, .surface-tab { transition: none; }
}