:root {
  --ink:        #0a0a0b;
  --ink-2:      #0e0d10;
  --ink-3:      #131217;

  --paper:      #ece7df;
  --paper-2:    #b8b1a7;
  --dim:        #8b847a;

  --gold:       #e0a83c;
  --gold-lt:    #fbe7bd;
  --gold-dk:    #8a5a2c;

  --rule:       rgba(236, 231, 223, 0.09);
  --rule-2:     rgba(236, 231, 223, 0.17);
  --rule-3:     rgba(236, 231, 223, 0.28);

  --display: "Didot", "Bodoni 72", "Bodoni MT", "Hoefler Text", "Playfair Display",
             Garamond, Georgia, "Times New Roman", serif;
  --sans:    -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
             "Segoe UI Variable Text", "Segoe UI", Inter, "Helvetica Neue",
             Helvetica, Arial, sans-serif;
  --mono:    ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --micro: 9.5px;
  --track: 0.16em;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-slow: cubic-bezier(0.32, 0.72, 0, 1);

  --dock-w: clamp(292px, 22vw, 340px);
  --dock-x: clamp(20px, 2.6vw, 44px);
  --dock-w-shut: 196px;
  --home-w: 41px;

  --glass: linear-gradient(rgba(255, 255, 255, 0.10),
                           rgba(255, 255, 255, 0.02) 34%,
                           rgba(255, 255, 255, 0) 68%),
           rgba(41, 39, 36, 0.74);
  --glass-blur: blur(46px) saturate(200%);
  --glass-edge: rgba(255, 255, 255, 0.22);
  --glass-shadow: 0 28px 64px rgba(0, 0, 0, 0.44), 0 2px 12px rgba(0, 0, 0, 0.3);
  --glass-radius: 14px;

  --rail-x: clamp(18px, 2.2vw, 34px);
  --rail-gap: 22px;
  --rail-reserve: calc(var(--rail-x) + var(--rail-gap) + 130px);
  --rail: min(clamp(196px, 22vw, 330px), (100vh - var(--rail-reserve)) / 2);

  --rail-sim: clamp(228px, 25vw, 380px);

  --bar-x: clamp(14px, 1.6vw, 26px);

  --bar-mode: 0;
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }

body {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.55;
  font-weight: 400;
  letter-spacing: -0.003em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(1100px 760px at 14% -8%,  rgba(214, 176, 116, 0.055), transparent 66%),
    radial-gradient(900px 700px at 88% 6%,    rgba(150, 92, 128, 0.05),   transparent 66%),
    radial-gradient(1100px 780px at 55% 112%, rgba(126, 94, 74, 0.045),   transparent 70%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.05;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

@keyframes rise {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: none; }
}
@keyframes fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes ruleIn {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}
@keyframes settle {
  from { opacity: 0; transform: scale(1.04); }
  to   { opacity: 1; transform: none; }
}
@keyframes drawRod {
  from { stroke-dashoffset: 100; }
  to   { stroke-dashoffset: 0; }
}

body.entered .hp-rod   { animation: drawRod 0.9s var(--ease) 0.2s both; }
body.entered .hp-bob,
body.entered .hp-pivot { animation: fade 0.7s var(--ease) 0.85s both; }
body.entered .hp-angle,
body.entered .hp-len   { animation: fade 0.9s var(--ease) 1.05s both; }
body.entered .hp-node  { animation: fade 0.9s var(--ease) 1.3s both; }
body.entered .theory   { animation: rise 0.9s var(--ease) 0.42s both; }

body.booting .rig,
body.booting .chrome,
body.booting .home { opacity: 0; }

body.entered .hp-rod { stroke-dasharray: 100; }

.chrome {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: var(--dock-x);
  pointer-events: none;
}

.chrome > *, .chrome-left > * { pointer-events: auto; }

.chrome-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.back {
  appearance: none;
  padding: 10px;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--paper-2);
  transition: color 0.4s var(--ease), background 0.4s var(--ease);
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-top-color: var(--glass-edge);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}
.back:hover { color: var(--paper); }

.back svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theory, .params {
  position: relative;
  appearance: none;
  border: 0;
  background: none;
  padding: 0 0 7px;
  font-family: var(--sans);
  font-size: var(--micro);
  font-weight: 400;
  letter-spacing: var(--track);
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.4s var(--ease);
}

.theory {
  color: var(--ink);
  background: var(--paper);
  font-weight: 600;
  padding: 12px 18px;
  border-radius: 3px;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}
.theory:hover { background: #fff; color: #000; }
.theory::after { display: none; }
.params { color: var(--dim); }
.params:hover { color: var(--paper); }

.theory::after, .params::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: currentColor;
  transform: scaleX(1);
  transform-origin: 0 50%;
  transition: transform 0.5s var(--ease);
}
.params[aria-pressed="false"]::after { transform: scaleX(0); }

body[data-stage="home"] .back,
body[data-stage="view"] .theory { display: none; }

main {
  position: fixed;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

[hidden] { display: none !important; }

.rig, .map-col {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.rig-stage { position: absolute; inset: 0; overflow: hidden; }

#stage { display: block; width: 100%; height: 100%; }
#stage.grabbable { cursor: grab; }
#stage.grabbing  { cursor: grabbing; }

body[data-stage="view"][data-view="sim"] .rig {
  transition: transform 0.72s var(--ease-slow);
}
@media (min-width: 1180px) and (min-height: 700px) {
  body[data-stage="view"][data-view="sim"].params-off .rig {
    transform: translateY(var(--sim-lift, 0px));
  }
}

body[data-stage="home"] .map-col { display: none; }

body[data-stage="view"][data-view="angle"] .rig,
body[data-stage="view"][data-view="momentum"] .rig {
  inset: var(--rail-x) var(--rail-x) auto auto;
  width: var(--rail);
  height: var(--rail);
}
body[data-view="angle"] .rig,
body[data-view="momentum"] .rig,
.rig-plot {
  z-index: 3;
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-top-color: var(--glass-edge);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.rig-plot {
  position: absolute;
  right: var(--rail-x);
  top: var(--rail-x);
  width: var(--rail);
  pointer-events: none;
}

body[data-view="sim"] .rig-plot { width: var(--rail-sim); }

body[data-view="angle"] .rig-plot,
body[data-view="momentum"] .rig-plot {
  top: calc(var(--rail-x) * 2 + var(--rail) + var(--rail-gap));
}

.rig-plot canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
}

.plot-cap {
  position: absolute;
  left: 50%;
  top: 2px;
  transform: translateX(-50%);
  margin: 0;
  font-size: 8.5px;
  letter-spacing: var(--track);
  text-transform: uppercase;
  color: var(--dim);
  pointer-events: none;
}
.plot-cap span {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--dim);
  padding-left: 5px;
}

.map-frame { position: absolute; inset: 0; overflow: hidden; }
.map-frame canvas { display: block; width: 100%; height: 100%; }

.home {
  position: fixed;
  inset: 0;
  z-index: 10;
  transition: opacity 0.7s var(--ease);
}

body[data-stage="view"] .home { opacity: 0; pointer-events: none; }

.home-frame {
  position: absolute;
  inset: clamp(74px, 10vh, 128px) clamp(66px, 9vw, 190px);
}

.home-pendulum {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.hp-rod {
  stroke: var(--paper);
  stroke-width: 6;
  stroke-linecap: round;
}

.hp-bob, .hp-pivot { fill: var(--paper); }

.hp-plumb {
  stroke: var(--paper);
  stroke-width: 1.5;
  stroke-opacity: 0.34;
  stroke-dasharray: 7 8;
}

.hp-arc {
  fill: none;
  stroke: var(--paper);
  stroke-width: 1.5;
  stroke-opacity: 0.5;
}

.hp-theta, .hp-len {
  font-family: var(--display);
  font-style: italic;
  font-size: 30px;
  fill: var(--paper-2);
}
.hp-len { font-size: 27px; fill: var(--dim); }

.hp-node { cursor: pointer; }
.hp-hit  { fill: transparent; }

.hp-ring {
  fill: none;
  stroke: var(--gold);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: 50% 50%;
  transform: scale(0.5);
  transition: opacity 0.45s var(--ease), transform 0.55s var(--ease);
}

.hp-node:hover .hp-ring,
.hp-node:focus-visible .hp-ring { opacity: 0.85; transform: scale(1); }

.hp-label {
  font-family: var(--sans);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  fill: var(--paper);
  transition: fill 0.45s var(--ease);
}
.hp-index {
  font-family: var(--mono);
  font-size: 15px;
  letter-spacing: 0.5px;
  fill: var(--dim);
  transition: fill 0.45s var(--ease);
}

.hp-node:hover .hp-label,
.hp-node:focus-visible .hp-label { fill: var(--gold-lt); }
.hp-node:hover .hp-index,
.hp-node:focus-visible .hp-index { fill: var(--gold); }

.hp-arm1, .hp-arm2 {
  transform-box: view-box;
  transition: transform 0.46s cubic-bezier(0.5, 0, 0.75, 0);
}
body.launching .hp-arm1 { transform: rotate(-15deg); }
body.launching .hp-arm2 { transform: rotate(29deg); }
body.launching .home { opacity: 0; transition-duration: 0.42s; }
body.launching .hp-label, body.launching .hp-index { opacity: 0; transition: opacity 0.2s; }

body[data-stage="home"]:not(.launching) main { opacity: 0; }
main { transition: opacity 0.7s var(--ease); }

.dock, .rig-plot, .map-foot {
  transition: opacity 0.55s var(--ease) 0.18s, transform 0.6s var(--ease) 0.18s;
}
body[data-stage="home"] .dock,
body[data-stage="home"] .rig-plot,
body[data-stage="home"] .map-foot,
body.launching .dock,
body.launching .rig-plot,
body.launching .map-foot {
  opacity: 0;
  transform: translateY(10px);
  transition-delay: 0s;
  pointer-events: none;
}

#controls {
  padding: 4px 20px 4px;
  counter-reset: grp;
}

.group { padding: clamp(15px, 2.4vh, 26px) 0 6px; }
.group:not([hidden]) ~ .group:not([hidden]) { border-top: 1px solid var(--rule); }

.group h3 {
  counter-increment: grp;
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin: 0 0 clamp(12px, 2vh, 20px);
  font-size: var(--micro);
  font-weight: 400;
  letter-spacing: var(--track);
  text-transform: uppercase;
  color: var(--dim);
}

.group h3::before {
  content: counter(grp, decimal-leading-zero);
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0;
  text-transform: none;
  color: var(--gold);
  opacity: 0.85;
}

.control {
  display: grid;
  grid-template-columns: 3.8em minmax(0, 1fr) 4.2em 2.8em;
  align-items: center;
  gap: 0 8px;
  margin-bottom: clamp(6px, 1vh, 9px);
}

.control label {
  font-family: var(--display);
  font-size: 14px;
  color: var(--paper-2);
  cursor: default;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color 0.3s var(--ease);
}
.control.has-hint label { cursor: help; }
.control:hover label { color: var(--paper); }

.control .unit {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.03em;
  color: var(--dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.slider {
  --fill: 50%;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 16px;
  background: transparent;
  cursor: pointer;
  display: block;
  margin: 0;
}

.slider::-webkit-slider-runnable-track {
  height: 1px;
  background:
    linear-gradient(90deg, var(--gold-dk), var(--gold)) 0 / var(--fill) 100% no-repeat,
    rgba(236, 231, 223, 0.14);
}
.slider::-moz-range-track {
  height: 1px;
  background:
    linear-gradient(90deg, var(--gold-dk), var(--gold)) 0 / var(--fill) 100% no-repeat,
    rgba(236, 231, 223, 0.14);
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 9px; height: 9px;
  margin-top: -4px;
  border-radius: 50%;
  border: 0;
  background: var(--paper);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.slider::-moz-range-thumb {
  width: 9px; height: 9px; border-radius: 50%; border: 0; background: var(--paper);
}
.slider:hover::-webkit-slider-thumb,
.slider:focus-visible::-webkit-slider-thumb {
  transform: scale(1.3);
  box-shadow: 0 0 0 4px rgba(224, 168, 60, 0.16);
}

.num {
  appearance: none;
  min-width: 0;
  width: 100%;
  height: 22px;
  border: 1px solid transparent;
  border-bottom-color: var(--rule);
  border-radius: 4px;
  background: none;
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  text-align: right;
  padding: 0 4px;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.control:hover .num { border-bottom-color: var(--rule-2); }
.num:focus {
  outline: none;
  border-color: rgba(224, 168, 60, 0.55);
  background: rgba(224, 168, 60, 0.06);
}
.num::selection { background: rgba(224, 168, 60, 0.3); }

.control.is-select { grid-template-columns: 4.2em minmax(0, 1fr); }

select {
  width: 100%;
  height: 26px;
  appearance: none;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--paper);
  background: rgba(255, 255, 255, 0.022);
  border: 1px solid var(--rule-2);
  border-radius: 6px;
  padding: 0 24px 0 9px;
  cursor: pointer;
  transition: border-color 0.3s var(--ease);
  background-image:
    linear-gradient(45deg, transparent 50%, var(--dim) 50%),
    linear-gradient(135deg, var(--dim) 50%, transparent 50%);
  background-position: calc(100% - 14px) calc(50% - 1px), calc(100% - 9px) calc(50% - 1px);
  background-size: 4px 4px, 4px 4px;
  background-repeat: no-repeat;
}
select:hover { border-color: var(--rule-3); }
select option { background: var(--ink-3); color: var(--paper); }

.dock {
  position: fixed;
  left: calc(var(--dock-x) + var(--home-w) + 12px);
  top: var(--dock-x);
  z-index: 15;
  width: var(--dock-w);
  max-height: calc(100vh - var(--dock-x) * 2);
  display: flex;
  flex-direction: column;
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-top-color: var(--glass-edge);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: opacity 0.55s var(--ease) 0.18s, transform 0.6s var(--ease) 0.18s,
              width 0.72s var(--ease-slow);
}

@media (min-width: 1180px) and (min-height: 700px) {

body[data-view="sim"] { --bar-mode: 1; }

body[data-view="sim"] .dock,
body[data-view="sim"].params-off .dock {
  left: var(--bar-x);
  right: var(--bar-x);
  top: auto;
  bottom: var(--bar-x);
  width: auto;
  max-height: calc(100vh - var(--bar-x) * 2);
  background: linear-gradient(rgba(255, 255, 255, 0.05),
                              rgba(255, 255, 255, 0.01) 40%,
                              rgba(255, 255, 255, 0) 72%),
              rgba(20, 19, 18, 0.72);
  border-color: rgba(255, 255, 255, 0.05);
  border-top-color: rgba(255, 255, 255, 0.11);
  box-shadow: none;
  flex-direction: row;
}

body[data-view="sim"] .dock-tab {
  width: auto;

  align-self: flex-start;
  gap: 0;
  padding: 14px 16px;
}
body[data-view="sim"]:not(.params-off) .dock-tab span { display: none; }
body[data-view="sim"].params-off .dock-tab { gap: 14px; padding: 15px 20px; }

body[data-view="sim"] .dock-body { flex: 1 1 auto; min-width: 0; }

body[data-view="sim"] .dock-inner {
  flex-direction: row;
  border-top: 0;
  border-left: 1px solid var(--rule);
}
body[data-view="sim"].params-off .dock-inner { border-left-color: transparent; }

body[data-view="sim"] .dock-scroll {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  padding: 0;
}

body[data-view="sim"] #controls {
  flex: 1 1 auto;
  min-height: 0;
  display: block;
  column-width: 240px;
  column-gap: 24px;
  padding: 6px 20px 4px;
  overflow: hidden;
}
body[data-view="sim"] .group {
  min-width: 0;
  padding: 4px 0 2px;
  break-inside: avoid;
}
body[data-view="sim"] .control {
  grid-template-columns: 3.4em minmax(0, 1fr) 3.9em 2.3em;
  gap: 0 7px;
  margin-bottom: 3px;
}
body[data-view="sim"] .group h3 { margin-bottom: 7px; }
body[data-view="sim"] .btn { padding: 6px 0; }
body[data-view="sim"] .preset { padding: 3px 0; }
body[data-view="sim"] .group:not([hidden]) ~ .group:not([hidden]) {
  border-top: 0;
}

body[data-view="sim"] .dock-actions {
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: nowrap;
  gap: 0;
  padding: 8px 20px;
  border-top: 0;
  border-left: 1px solid var(--rule);
  white-space: nowrap;
}

}

.dock-tab {
  flex: none;
  appearance: none;
  border: 0;
  background: none;
  width: 100%;
  padding: 15px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-family: var(--sans);
  font-size: var(--micro);
  font-weight: 400;
  letter-spacing: var(--track);
  text-transform: uppercase;
  color: var(--dim);
  cursor: pointer;
  transition: color 0.4s var(--ease);
}
.dock-tab:hover { color: var(--paper); }

.dock-tab i {
  position: relative;
  width: 11px;
  height: 11px;
  flex: none;
}
.dock-tab i::before, .dock-tab i::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 1px;
  background: var(--gold);
  transition: transform 0.5s var(--ease);
}
.dock-tab i::after { transform: rotate(90deg) scaleX(0); }
body.params-off .dock-tab i::after { transform: rotate(90deg) scaleX(1); }

.dock-body {
  display: grid;
  grid-template-rows: 1fr;
  min-height: 0;
  transition: grid-template-rows 0.72s var(--ease-slow), opacity 0.4s var(--ease);
}
body.params-off .dock-body { grid-template-rows: 0fr; opacity: 0; }

body.params-off .dock { width: var(--dock-w-shut); }

.dock-inner {
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--rule);
}
body.params-off .dock-inner { border-top-color: transparent; }

.dock-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 4px 0 14px;
}

.dock-scroll::-webkit-scrollbar { width: 3px; }
.dock-scroll::-webkit-scrollbar-track { background: transparent; }
.dock-scroll::-webkit-scrollbar-thumb { background: var(--rule-2); }
.dock-scroll { scrollbar-width: thin; scrollbar-color: var(--rule-2) transparent; }

.dock-actions {
  flex: none;
  padding: 11px 20px 14px;
  border-top: 1px solid var(--rule);
  display: flex;
  flex-wrap: wrap;
  gap: 0 18px;
}

.btn {
  position: relative;
  appearance: none;
  border: 0;
  background: none;
  color: var(--paper-2);
  font-family: var(--sans);
  font-size: var(--micro);
  font-weight: 400;
  letter-spacing: var(--track);
  text-transform: uppercase;
  padding: 9px 0;
  cursor: pointer;
  transition: color 0.4s var(--ease);
}

.btn::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.5s var(--ease);
}

.btn:hover { color: var(--paper); }
.btn:hover::after { transform: scaleX(1); }
.btn.primary { color: var(--paper); }
.btn.primary.paused { color: var(--gold-lt); }
.btn.primary::after { transform: scaleX(1); background: var(--rule-3); }

.presets-panel:empty { display: none; }

.presets-panel {
  position: fixed;
  left: calc(var(--dock-x) + var(--home-w) + 12px);
  top: var(--dock-x);
  z-index: 15;
  width: 212px;
  padding: 13px 18px 14px;
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-top-color: var(--glass-edge);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: opacity 0.55s var(--ease) 0.18s, transform 0.6s var(--ease) 0.18s;
}

body[data-stage="home"] .presets-panel,
body.launching .presets-panel {
  opacity: 0;
  transform: translateY(10px);
  transition-delay: 0s;
  pointer-events: none;
}

.presets-panel .presets-group { padding: 0; border: 0; }

.presets-tab {
  appearance: none;
  border: 0;
  background: none;
  width: 100%;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  color: var(--dim);
  transition: color 0.4s var(--ease);
}
.presets-tab:hover { color: var(--paper); }
.presets-tab h3 { margin: 0; color: inherit; }
.presets-tab i {
  position: relative;
  width: 11px;
  height: 11px;
  flex: none;
}
.presets-tab i::before, .presets-tab i::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 1px;
  background: var(--gold);
  transition: transform 0.5s var(--ease);
}
.presets-tab i::after { transform: rotate(90deg) scaleX(0); }
body.presets-off .presets-tab i::after { transform: rotate(90deg) scaleX(1); }

.presets-body {
  display: grid;
  grid-template-rows: 1fr;
  min-height: 0;
  transition: grid-template-rows 0.6s var(--ease-slow), opacity 0.4s var(--ease);
}
.presets-body > * { min-height: 0; overflow: hidden; padding-top: 11px; }
body.presets-off .presets-body { grid-template-rows: 0fr; opacity: 0; }
body.presets-off .presets-body > * { padding-top: 0; }

.dock .presets-tab { pointer-events: none; }
.dock .presets-tab i { display: none; }

.presets-group { padding: 16px 20px 2px; }
.presets-group h3::before { content: none; }

.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 14px;
}

.presets-panel .presets { grid-template-columns: 1fr; gap: 0; }

.preset {
  position: relative;
  appearance: none;
  border: 0;
  background: none;
  padding: 4px 0;
  text-align: left;
  font-family: var(--sans);
  font-size: 9.5px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.45s var(--ease);
}

.preset::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 1px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.55s var(--ease);
}

.preset:hover { color: var(--paper); }
.preset.active { color: var(--gold-lt); }
.preset.active::after { transform: scaleX(1); }

.probe {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 18;
  margin: 15px 0 0 17px;
  padding: 7px 12px 7px 8px;
  display: flex;
  align-items: center;
  gap: 9px;
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-top-color: var(--glass-edge);
  border-radius: 9px;
  box-shadow: var(--glass-shadow);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.22s var(--ease);
}
.probe.on { opacity: 1; }

.probe-dial { width: 20px; height: 20px; flex: none; transform: rotate(-90deg); }
.probe-track {
  fill: none;
  stroke: rgba(236, 231, 223, 0.16);
  stroke-width: 5;
}
.probe-arc {
  fill: none;
  stroke: var(--paper-2);
  stroke-width: 5;
  stroke-dasharray: 0 100;
  transition: stroke-dasharray 0.12s linear, stroke 0.3s var(--ease);
}
.probe.is-hot .probe-arc { stroke: var(--gold); }

.probe p { margin: 0; }

.probe-lam {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--paper);
  white-space: nowrap;
}

.map-foot {
  position: absolute;
  right: clamp(24px, 2.4vw, 40px);
  bottom: clamp(24px, 2.4vw, 40px);
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 10px 17px;
  background: var(--glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-top-color: var(--glass-edge);
  border-radius: var(--glass-radius);
  box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.hoverline:empty { display: none; }

.hoverline.is-hover { min-width: 15ch; }

.hoverline {
  order: -1;
  margin: 0;
  text-align: right;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--paper-2);
  white-space: nowrap;
  overflow: hidden;
}

.legend { width: 164px; }
.legend canvas { display: block; width: 100%; height: 20px; }

.science {
  position: fixed;
  inset: 0;
  z-index: 40;
  overflow: hidden;
  background: rgba(6, 6, 7, 0.86);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s var(--ease);
  display: flex;
  justify-content: center;
}

.science.open { opacity: 1; pointer-events: auto; }

.science-inner {
  scroll-behavior: smooth;
  position: relative;
  width: 100%;
  height: 100%;
  overflow-y: auto;
  padding: clamp(48px, 6.5vh, 78px) clamp(20px, 4vw, 64px) clamp(36px, 6vh, 72px);
  background: var(--ink-2);
  border-left: 1px solid var(--rule);
  border-right: 1px solid var(--rule);
  transform: translateY(18px) scale(0.995);
  transform-origin: 50% 0;
  transition: transform 0.7s var(--ease);
}
.science.open .science-inner { transform: none; }

.science-col {
  counter-reset: thsec;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.th-sec {
  counter-increment: thsec;
  border-bottom: 1px solid var(--rule-2);
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}
.th-sec:first-of-type { border-top: 1px solid var(--rule-2); }

.th-sec:has(.th-head[aria-expanded="true"]) { flex: none; }

.th-head {
  appearance: none;
  border: 0;
  background: none;
  width: 100%;
  flex: 1 1 auto;
  padding: clamp(18px, 2.6vh, 32px) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  text-align: left;
  cursor: pointer;
  color: #fff;
  transition: color 0.4s var(--ease), padding-left 0.5s var(--ease);
}
.th-head:hover { padding-left: 14px; }

.th-title {
  display: flex;
  align-items: baseline;
  gap: clamp(14px, 2vw, 34px);
  font-family: var(--sans);
  font-size: clamp(30px, 5.4vw, 82px);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.035em;
}
.th-title::before {
  content: counter(thsec, decimal-leading-zero);
  flex: none;
  width: 17px;
  font-family: var(--sans);
  font-size: var(--micro);
  font-weight: 400;
  letter-spacing: var(--track);
  color: var(--dim);
}

.th-mark {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  align-self: center;
}
.th-mark::before, .th-mark::after {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 22px;
  height: 1.5px;
  background: var(--paper-2);
  transition: transform 0.5s var(--ease), background 0.4s var(--ease);
}
.th-mark::after { transform: rotate(90deg); }
.th-head[aria-expanded="true"] .th-mark::after { transform: rotate(90deg) scaleX(0); }
.th-head:hover .th-mark::before,
.th-head:hover .th-mark::after { background: var(--paper); }

.th-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.55s var(--ease), opacity 0.4s var(--ease);
  opacity: 0;
}
.th-head[aria-expanded="true"] + .th-body {
  grid-template-rows: 1fr;
  opacity: 1;
}
.th-inner {
  min-height: 0;
  overflow: hidden;
  padding-left: calc(17px + clamp(14px, 2vw, 34px));
}
.th-inner > :first-child { margin-top: 0; }
.th-inner > :last-child { padding-bottom: clamp(26px, 4vh, 52px); }

.science-inner::-webkit-scrollbar { width: 3px; }
.science-inner::-webkit-scrollbar-thumb { background: var(--rule-2); }

.science p {
  max-width: 74ch;
  font-size: clamp(14.5px, 1.05vw, 17px);
  line-height: 1.8;
  color: #fff;
}

.science p + p { margin-top: 1.2em; }

.science b  { color: #fff; font-weight: 500; }
.science em { color: var(--gold-lt); font-style: normal; }

.science pre {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 400;
  line-height: 2;
  letter-spacing: 0.01em;
  color: var(--gold-lt);
  background: none;
  border: 0;
  border-top: 1px solid rgba(224, 168, 60, 0.16);
  border-bottom: 1px solid rgba(224, 168, 60, 0.16);
  padding: 22px 4px;
  margin: 26px 0;
  overflow-x: auto;
  white-space: pre;
  tab-size: 4;
}

.science pre.one { text-align: center; }

.science code {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--gold-lt);
  background: none;
  padding: 0 1px;
  white-space: nowrap;
}

.close {
  position: fixed;
  top: clamp(16px, 2.4vh, 34px);
  right: clamp(16px, 2.6vw, 42px);
  z-index: 2;
  width: clamp(38px, 3.6vw, 52px);
  height: clamp(38px, 3.6vw, 52px);
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  background: none;
  color: #fff;
  cursor: pointer;
  opacity: 0.75;
  transition: opacity 0.4s var(--ease), transform 0.5s var(--ease);
}
.close svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
  stroke-linecap: round;
}
.close:hover { opacity: 1; transform: rotate(90deg); }

:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 3px;
  border-radius: 1px;
}

.hp-node:focus-visible, .hp-node:focus { outline: none; }

@media (min-width: 1500px) {
  body { font-size: 13.5px; }
  :root { --micro: 10px; }

  #controls, .dock-actions, .dock-tab { padding-left: 24px; padding-right: 24px; }
}

@media (min-width: 1900px) {
  body { font-size: 14px; }

  #controls, .dock-actions, .dock-tab { padding-left: 28px; padding-right: 28px; }
}

@media (max-width: 720px) {

  .home-frame { inset: 15vh 14px 20vh; }
  .hp-label { font-size: 38px; letter-spacing: 5px; stroke-width: 12px; }
  .hp-index { font-size: 47px; }
  .hp-hit   { r: 88px; }

  .dock {
    top: 96px;
    width: calc(100vw - var(--dock-x) * 2 - var(--home-w) - 12px);
    max-height: calc(100vh - 96px - var(--dock-x));
  }

  .chrome { padding: 18px 20px; }
  .chrome-left { gap: 16px; }

  body[data-stage="view"]:not(.params-off) .rig-plot,
  body[data-stage="view"]:not(.params-off) .map-foot,
  body[data-stage="view"][data-view="angle"]:not(.params-off) .rig,
  body[data-stage="view"][data-view="momentum"]:not(.params-off) .rig {
    opacity: 0;
    pointer-events: none;
  }

  .map-foot { right: 20px; bottom: 20px; width: 216px; flex-wrap: wrap; gap: 8px; }
  .hoverline { width: 100%; font-size: 9.5px; }
  .legend { width: 100%; }

  body[data-stage="view"][data-view="angle"] .rig,
  body[data-stage="view"][data-view="momentum"] .rig {
    inset: auto auto 112px 20px;
    width: 104px;
    height: 104px;
  }

  body[data-view="angle"] .rig-plot,
  body[data-view="momentum"] .rig-plot {
    top: auto;
    bottom: 112px;
    left: 136px;
    right: auto;
    width: 104px;
  }

  body[data-view="sim"] .rig-plot {
    top: auto;
    bottom: 20px;
    right: 20px;
    width: 148px;
  }

  .science-inner { padding: 62px 20px 44px; }

  .th-head  { gap: 16px; }
  .th-title { gap: 12px; }
  .th-inner { padding-left: 0; }
}

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

  body.booting .rig,
  body.booting .chrome,
  body.booting .home { opacity: 1; }
}