:root {
  --bg: #080705;
  --bg-2: #100e0b;
  --ink: #ebe4d4;
  --muted: #9a907e;
  --dim: #5c5548;
  --line: rgba(232, 165, 75, 0.16);
  --amber: #e8a54b;
  --amber-2: #c4842e;
  --copper: #8a5a2b;
  --teal: #7ee0c8;
  --rose: #e07a6a;
  --paper: #f3ead6;
  --cell: #16130f;
  --cell-on: #2a2116;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Outfit", system-ui, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(232, 165, 75, 0.08), transparent 50%),
    radial-gradient(900px 500px at 100% 10%, rgba(126, 224, 200, 0.05), transparent 45%),
    var(--bg);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.55;
  overflow-x: hidden;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 40;
  opacity: 0.09;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.orb {
  pointer-events: none;
  position: fixed;
  border-radius: 50%;
  filter: blur(70px);
  z-index: 0;
  opacity: 0.35;
}
.orb-a {
  width: 420px;
  height: 420px;
  left: -80px;
  top: 80px;
  background: #3a2410;
  animation: drift 18s var(--ease) infinite alternate;
}
.orb-b {
  width: 360px;
  height: 360px;
  right: -60px;
  top: 320px;
  background: #14332c;
  animation: drift 22s var(--ease) infinite alternate-reverse;
}
@keyframes drift {
  to { transform: translate(40px, 30px); }
}

.nav, main, .foot { position: relative; z-index: 1; }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 7vw 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.08em;
  font-size: 13px;
  text-transform: lowercase;
}
.brand-mark {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 14px;
}
.brand-mark i {
  display: block;
  width: 3px;
  background: var(--amber);
  border-radius: 1px;
  animation: bars 1.8s ease-in-out infinite;
}
.brand-mark i:nth-child(1) { height: 7px; animation-delay: 0s; }
.brand-mark i:nth-child(2) { height: 14px; animation-delay: 0.15s; }
.brand-mark i:nth-child(3) { height: 10px; animation-delay: 0.3s; }
@keyframes bars {
  0%, 100% { opacity: 0.4; transform: scaleY(0.7); }
  50% { opacity: 1; transform: scaleY(1); }
}
.nav-links { display: flex; gap: 22px; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.04em;
}
.nav-links a:hover { color: var(--ink); }

.hero {
  padding: 72px 7vw 28px;
  max-width: 980px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  color: var(--amber);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 0 rgba(232, 165, 75, 0.6);
  animation: ping 2s ease-out infinite;
}
@keyframes ping {
  70% { box-shadow: 0 0 0 10px transparent; }
}
h1 {
  margin: 0 0 22px;
  font-family: var(--serif);
  font-size: clamp(40px, 7vw, 78px);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.03em;
}
h1 em {
  font-style: italic;
  color: var(--paper);
  background: linear-gradient(90deg, var(--paper), var(--amber));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  max-width: 640px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  font-weight: 300;
}

.composer { padding: 36px 7vw 10px; }
.composer-shell {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(10px);
}
textarea {
  width: 100%;
  display: block;
  resize: none;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.4;
  padding: 22px 22px 8px;
  min-height: 96px;
}
textarea::placeholder { color: #5a5346; }
.composer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px 14px 22px;
}
#count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dim);
  letter-spacing: 0.08em;
}
.run {
  appearance: none;
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px 11px 18px;
  border-radius: 999px;
  background: linear-gradient(180deg, #f0b45a, #c4842e);
  color: #1a1208;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  box-shadow: 0 8px 24px rgba(196, 132, 46, 0.28);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.run:hover { transform: translateY(-1px); }
.run:disabled {
  opacity: 0.55;
  cursor: wait;
  transform: none;
}
.run-icon {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(0,0,0,0.15);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.chip {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 12px;
  cursor: pointer;
  font-family: var(--sans);
  transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.chip:hover {
  color: var(--ink);
  border-color: rgba(232, 165, 75, 0.4);
  background: rgba(232, 165, 75, 0.06);
}

.deck { padding: 28px 7vw 10px; }
.deck-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}
.meta-k { color: var(--dim); }
.meta-v { color: var(--amber); text-transform: none; letter-spacing: 0.04em; }

.tape-frame {
  display: grid;
  grid-template-columns: 28px 1fr 28px;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #0c0a08;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02), var(--shadow);
}
.sprocket {
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 10px,
      #2a2118 10px 16px,
      transparent 16px 28px
    );
  opacity: 0.7;
}
.tape-viewport {
  position: relative;
  height: 148px;
  overflow: hidden;
  background:
    linear-gradient(90deg, #0c0a08 0, transparent 8%, transparent 92%, #0c0a08 100%),
    repeating-linear-gradient(
      90deg,
      #14110d 0 2px,
      #0f0d0a 2px 72px
    );
}
.tape {
  position: absolute;
  inset: 0 auto 0 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 50%;
  height: 100%;
  will-change: transform;
  transition: transform 0.7s var(--ease);
}
.cell {
  flex: 0 0 132px;
  height: 88px;
  border-radius: 10px;
  background: linear-gradient(180deg, #1c1813, #14110d);
  border: 1px solid rgba(232, 165, 75, 0.12);
  color: var(--muted);
  padding: 12px 12px 10px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
  transform: translateZ(0);
}
.cell b {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--dim);
  letter-spacing: 0.12em;
}
.cell span {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.35;
  color: var(--paper);
  word-break: break-word;
}
.cell.is-blank span { color: #3d372e; }
.cell.is-active {
  background: linear-gradient(180deg, #3a2a16, #24190e);
  border-color: rgba(232, 165, 75, 0.55);
  box-shadow: 0 0 0 1px rgba(232, 165, 75, 0.2), 0 10px 30px rgba(232, 165, 75, 0.12);
}
.cell.is-written { border-color: rgba(126, 224, 200, 0.28); }
.cell.is-halt {
  border-color: rgba(126, 224, 200, 0.7);
  background: linear-gradient(180deg, #16332c, #0f1f1b);
}

.head {
  pointer-events: none;
  position: absolute;
  left: 50%;
  top: 14px;
  bottom: 14px;
  width: 148px;
  transform: translateX(-50%);
  border: 1.5px solid var(--amber);
  border-radius: 12px;
  box-shadow: 0 0 0 6px rgba(232, 165, 75, 0.06), 0 0 40px rgba(232, 165, 75, 0.12);
  z-index: 2;
}
.head::before, .head::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--amber);
  transform: translateX(-50%) rotate(45deg);
}
.head::before { top: -6px; }
.head::after { bottom: -6px; }
.head-label {
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.delta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  min-height: 24px;
}
.delta-fn {
  color: var(--amber);
  font-size: 16px;
}
.delta.flash { color: var(--paper); }

.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding: 28px 7vw 10px;
}
.workspace[hidden], .insight[hidden], .halt[hidden] { display: none !important; }
.panel {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(16, 14, 11, 0.72);
  padding: 20px;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}
.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}
.panel-k {
  margin: 0;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}
.panel h2 {
  margin: 4px 0 0;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 400;
}
.panel-note {
  margin: 0 0 12px;
  color: var(--dim);
  font-size: 13px;
}
.ghost {
  appearance: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 12px;
  font-family: var(--sans);
  font-size: 12px;
  cursor: pointer;
}
.ghost:hover { color: var(--ink); border-color: var(--amber); }
.scroll {
  margin: 0;
  flex: 1;
  overflow: auto;
  padding: 18px 20px;
  border-radius: 12px;
  background: #0a0907;
  border: 1px solid rgba(255,255,255,0.03);
  color: #e6dcc6;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 520px;
}
.ln-cell { color: var(--paper); font-weight: 500; }
.ln-why { color: var(--muted); }
.ln-go { color: var(--teal); font-weight: 600; }
.scroll::-webkit-scrollbar { width: 8px; }
.scroll::-webkit-scrollbar-thumb { background: #2a241c; border-radius: 8px; }

.transport { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 16px;
}
.icon-btn.play {
  background: var(--amber);
  color: #1a1208;
  border-color: transparent;
}
.speed {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
  color: var(--dim);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.speed input { accent-color: var(--amber); width: 72px; }

.states {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 18px;
}
.state {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--dim);
  transition: all 0.35s var(--ease);
}
.state.is-on {
  color: #1a1208;
  background: var(--amber);
  border-color: var(--amber);
}
.state.is-halt {
  color: #06221c;
  background: var(--teal);
  border-color: var(--teal);
}

.thought {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.thought-k {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
}
.thought-body {
  margin: 0;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.45;
  color: var(--paper);
  min-height: 88px;
  opacity: 0;
  transform: translateY(8px);
}
.thought-body.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.halt {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(126, 224, 200, 0.1), rgba(126, 224, 200, 0.03));
  border: 1px solid rgba(126, 224, 200, 0.28);
}
.halt-k {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
}
.halt-v {
  margin: 0;
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.2;
}
.halt-s { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.insight {
  margin: 8px 7vw 0;
  padding: 16px 18px;
  border-left: 2px solid var(--amber);
  color: var(--muted);
  font-size: 15px;
}

.theory {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding: 80px 7vw 40px;
  align-items: start;
}
.theory h2 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 400;
  line-height: 1.05;
}
.theory h2 em { font-style: italic; color: var(--amber); }
.theory-copy p { color: var(--muted); }
.theory-copy strong { color: var(--paper); font-weight: 500; }
.map {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.map li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.map-k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
  padding-top: 3px;
}
.map-v { color: var(--muted); font-size: 14px; }

.foot {
  display: flex;
  justify-content: space-between;
  padding: 28px 7vw 40px;
  color: var(--dim);
  font-size: 12px;
  letter-spacing: 0.08em;
}

body.is-busy .run-label { letter-spacing: 0.04em; }
body.is-busy .tape-frame { box-shadow: 0 0 0 1px rgba(232, 165, 75, 0.2), var(--shadow); }

@media (max-width: 900px) {
  .workspace, .theory { grid-template-columns: 1fr; }
  .map li { grid-template-columns: 1fr; gap: 4px; }
  h1 { font-size: 40px; }
  textarea { font-size: 18px; }
  .nav { padding: 18px 5vw 0; }
  .hero, .composer, .deck, .workspace, .theory, .foot, .insight { padding-left: 5vw; padding-right: 5vw; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}