:root {
  --paper: #0b0c0e;
  --rule: rgba(233, 229, 216, 0.12);
  --ink: #e4e1d8;
  --head: #f5f2ea;
  --muted: #9a978c;
  --faint: #6b685f;
  --lime: #bfff00;
  --lime2: #d6ff4a;
  --limed: #9fbf2c;
  --serif: "EB Garamond", Georgia, serif;
  --mono: "JetBrains Mono", monospace;
  --col: 680px;
}

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

html { scroll-behavior: smooth; scrollbar-color: var(--rule) var(--paper); scrollbar-width: thin; }

body {
  margin: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(191, 255, 0, 0.05), transparent 55%),
    var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.72;
  min-height: 100vh;
}

::selection { background: var(--lime); color: #0a0a0a; }

a { color: var(--lime); text-underline-offset: 3px; }
a:hover { color: var(--lime2); }

.cursor-trail {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--glow, 0);
}

.topbar,
.view,
.overlay { position: relative; z-index: 2; }

.mono { font-family: var(--mono); }
.dim { color: var(--faint); }
.live { color: var(--lime); }
.dot { margin: 0 10px; color: var(--faint); }

@media (pointer: coarse), (prefers-reduced-motion: reduce) {
  .cursor-trail { display: none !important; }
}

/* ── topbar ── */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  background: linear-gradient(180deg, rgba(11, 12, 14, 0.92), rgba(11, 12, 14, 0.55) 70%, transparent);
  pointer-events: none;
}

.topbar a,
.topbar .top-links { pointer-events: auto; }

.top-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--head);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.06em;
}

.top-brand .brand-mark,
.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  display: block;
  object-fit: cover;
  flex: 0 0 auto;
}

.toc .brand .brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.top-links {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: lowercase;
}

.top-links a {
  color: var(--muted);
  text-decoration: none;
}

.top-links a:hover,
.top-links a.is-current { color: var(--lime); }

.top-links .launch-slot { letter-spacing: 0.06em; }
.top-links a#link-x,
.top-links a#ca-slot { color: var(--muted); text-decoration: none; }
.top-links a#link-x:hover,
.top-links a#ca-slot:hover { color: var(--lime); }

/* ── views ── */
.view[hidden] { display: none !important; }

.view-manuscript {
  padding-top: 28px;
}

.view-instrument {
  padding: 72px 24px 80px;
  max-width: 1100px;
  margin: 0 auto;
}

/* ── toc ── */
.toc {
  position: fixed;
  left: 28px;
  top: 56px;
  bottom: 0;
  width: 200px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  padding: 12px 0 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.toc .brand b {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 20px;
  color: var(--head);
}

.toc .lbl {
  font-size: 15.5px;
  color: var(--limed);
  margin: 28px 0 20px;
  display: flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
}

.toc .lbl::before {
  content: "";
  width: 15px;
  height: 1px;
  background: var(--limed);
}

.orbit {
  position: relative;
  padding-left: 18px;
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.orbit .axis {
  position: absolute;
  left: 8px;
  top: 0.45em;
  bottom: 0.45em;
  width: 1px;
  background: var(--rule);
}

.orbit .prog {
  position: absolute;
  left: 8px;
  top: 0.45em;
  width: 1px;
  height: 8%;
  background: var(--lime);
  box-shadow: 0 0 10px rgba(191, 255, 0, 0.4);
  transition: height 0.15s linear;
}

.orbit a {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.3;
  padding-left: 4px;
}

.orbit a .n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faint);
  margin-right: 9px;
}

.orbit a::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 0.45em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--faint);
}

.orbit a.past::before { background: var(--limed); border-color: var(--limed); }
.orbit a.active { color: var(--head); }
.orbit a.active::before {
  width: 10px;
  height: 10px;
  left: -15.5px;
  top: 0.35em;
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 12px var(--lime);
}

/* ── manuscript column ── */
.col {
  width: min(var(--col), calc(100% - 48px));
  margin: 0 auto;
  padding: 72px 0 120px;
}

.hero { margin-bottom: 56px; text-align: center; }

.links {
  margin-bottom: 18px;
  font-size: 12px;
  color: var(--muted);
}

.links a { color: var(--muted); }
.links a:hover { color: var(--lime); }

.name {
  margin: 0;
  font-weight: 400;
  font-size: clamp(42px, 8vw, 56px);
  color: var(--head);
  line-height: 1;
}

.tagline {
  margin: 14px auto 0;
  max-width: 34em;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
  text-transform: lowercase;
  line-height: 1.5;
}

.instrument {
  margin-top: 40px;
  border: 1px solid var(--rule);
  background: rgba(255, 255, 255, 0.025);
  padding: 10px 12px 10px;
  text-align: left;
}

.instrument-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.instrument-head .quiet {
  color: var(--muted);
  text-decoration: none;
}

.instrument-head .quiet:hover { color: var(--lime); }

.instrument canvas {
  display: block;
  width: 100%;
  height: auto;
}

.caption {
  margin: 10px 4px 2px;
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.04em;
}

.caption .sep { margin: 0 8px; }

section { margin: 64px 0; }

section h2 {
  font-style: italic;
  font-weight: 400;
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 28px;
}

section p { margin: 0 0 1.1em; text-align: justify; hyphens: auto; }
section p:last-child { margin-bottom: 0; }

.foot {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 12px;
  color: var(--faint);
}

/* ── instrument desk ── */
.desk-hero { max-width: 720px; margin-bottom: 36px; }

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--faint);
  text-transform: lowercase;
  margin: 0 0 12px;
}

.desk-title {
  margin: 0;
  font-weight: 400;
  font-size: clamp(36px, 6vw, 48px);
  color: var(--head);
}

.desk-lead {
  margin: 14px 0 0;
  color: var(--muted);
  max-width: 40em;
}

.desk-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.7fr);
  gap: 18px;
  align-items: start;
}

.panel {
  border: 1px solid var(--rule);
  background: rgba(255, 255, 255, 0.025);
  padding: 14px;
}

.panel-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 10px;
}

.panel-bar #readout-gamma,
.panel-bar #readout-winds { color: var(--lime); }

#desk-canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #08090b;
  cursor: crosshair;
  touch-action: none;
}

.hint {
  margin: 10px 0 0;
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.04em;
}

.panel-title {
  margin: 0 0 16px;
  font-style: italic;
  font-weight: 400;
  font-size: 15px;
  color: var(--muted);
}

.field {
  display: grid;
  gap: 6px;
  margin-bottom: 14px;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--faint);
  text-transform: lowercase;
}

.field select,
.field input[type="text"] {
  width: 100%;
  background: #08090b;
  border: 1px solid var(--rule);
  color: var(--ink);
  font: inherit;
  padding: 10px 12px;
  outline: none;
}

.field select:focus,
.field input[type="text"]:focus { border-color: rgba(191, 255, 0, 0.45); }

.field input[type="range"] {
  width: 100%;
  accent-color: var(--lime);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 16px;
}

.btn-row button {
  background: var(--lime);
  color: #0a0a0a;
  border: none;
  font: inherit;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  padding: 10px 12px;
  cursor: pointer;
}

.btn-row button.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--rule);
}

.btn-row button:hover { filter: brightness(1.05); }

.panel-note {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
  text-transform: none;
  letter-spacing: 0;
}

.back {
  color: var(--muted);
  text-decoration: none;
  font-size: 11px;
  letter-spacing: 0.06em;
}

.back:hover { color: var(--lime); }

.desk-copy {
  margin-top: 40px;
  max-width: 680px;
}

.desk-copy h2 {
  font-style: italic;
  font-weight: 400;
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 16px;
}

.desk-copy p {
  margin: 0;
  color: var(--ink);
}

/* ── overlays ── */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 20;
  overflow: auto;
  background: rgba(8, 9, 11, 0.92);
  padding: 48px 20px 80px;
}

.overlay.open { display: block; }

.overlay-inner {
  max-width: 680px;
  margin: 0 auto;
  position: relative;
}

.overlay-close {
  position: sticky;
  top: 12px;
  float: right;
  background: transparent;
  border: 1px solid var(--rule);
  color: var(--muted);
  font: inherit;
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 8px 12px;
  cursor: pointer;
  text-transform: lowercase;
}

.overlay-close:hover { color: var(--head); border-color: var(--muted); }

.overlay-title {
  margin: 8px 0 28px;
  font-weight: 400;
  font-size: 28px;
  color: var(--head);
}

.overlay p {
  margin: 0 0 1.1em;
  text-align: justify;
  hyphens: auto;
}

.note-line {
  margin-top: 20px;
  font-size: 12px;
  color: var(--faint);
  letter-spacing: 0.03em;
}

.code {
  margin: 18px 0;
  padding: 18px 16px;
  border: 1px solid var(--rule);
  background: #08090b;
  color: #cfd8a8;
  font-size: 12px;
  line-height: 1.55;
  overflow-x: auto;
  white-space: pre;
}

.code .c { color: var(--muted); font-style: italic; }
.code .k { color: #d8c590; }
.code .s { color: #c9b89a; }
.code .n { color: #9fdf4a; }

body.overlay-open { overflow: hidden; }

.top-launch-sep { display: none; }

@media (max-width: 960px) {
  .toc { display: none; }
  .col { padding-top: 64px; }
  section p,
  .overlay p { text-align: left; hyphens: none; }
  /* keep x / CA; collapse overlay links (still in hero) */
  .top-extra { display: none; }
  .top-launch-sep { display: inline; }
  .desk-grid { grid-template-columns: 1fr; }
}

.overlay-inner-wide { max-width: 820px; }