:root {
  --ink: #111113;
  --gray: #9a9aa2;
  --tile: #f5f5f6;
  --hairline: #ececef;
  --pill: #f3f3f4;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
  --ease: cubic-bezier(.32, .72, 0, 1);
  --enter: cubic-bezier(.22, 1, .36, 1);
  --card-shadow: 0 2px 10px -2px rgba(0, 0, 0, .06), 0 24px 50px -28px rgba(0, 0, 0, .22);
  font-family: "Inter", -apple-system, system-ui, sans-serif;
}
@supports (font-variation-settings: normal) {
  :root { font-family: "InterVariable", "Inter", -apple-system, system-ui, sans-serif; }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  background: #fff;
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.dear { font-size: 16.5px; font-weight: 600; }
.gray { color: var(--gray); font-size: 16.5px; margin-top: 22px; }

/* floating pill nav, a white segment slides under the active mode */
.pill {
  position: fixed; top: 28px; left: 50%; z-index: 50;
  transform: translateX(-50%);
  display: flex; gap: 6px; padding: 7px;
  background: var(--pill); border-radius: 999px;
  box-shadow: 0 18px 40px -18px rgba(0, 0, 0, .22), 0 1px 2px rgba(0, 0, 0, .04);
}
.pill-ind {
  position: absolute; left: 0; top: 7px;
  width: 76px; height: 46px; border-radius: 999px;
  background: #fff;
  box-shadow: 0 8px 20px -8px rgba(0, 0, 0, .28), 0 1px 2px rgba(0, 0, 0, .06);
  transform: translateX(7px);
  transition: transform .45s var(--ease);
}
.pill-btn {
  position: relative; z-index: 1;
  width: 76px; height: 46px; border-radius: 999px;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 600; text-decoration: none;
  color: #8e8e96;
  transition: color .3s var(--ease);
}
.pill-btn:hover { color: #55555c; }
.pill-btn[aria-current="true"] { color: var(--ink); }

/* intro, the same narrow column as the portfolio */
.intro { max-width: 420px; margin: 0 auto; padding: 132px 24px 44px; }

/* the stage: canvas fills the tile, white cards sit on it */
.bench { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.stage {
  position: relative;
  height: clamp(640px, calc(100vh - 140px), 780px);
  background: var(--tile);
  border-radius: 22px;
  overflow: hidden;
}
.view { position: absolute; inset: 0; }
.road { display: block; width: 100%; height: 100%; }
.hud {
  position: absolute; inset: 20px;
  display: flex; justify-content: space-between;
  pointer-events: none;
}
.hud-col { width: 288px; display: flex; flex-direction: column; gap: 16px; }
.hud-col > :last-child { margin-top: auto; }
.card {
  pointer-events: auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: var(--card-shadow);
  padding: 16px 18px;
}
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.card-head b, .stat small, .ctl small, .brain small {
  display: block;
  font-size: 9.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
}
.card-head em {
  font-style: normal; font-family: var(--mono); font-size: 9px; letter-spacing: .05em;
  color: rgba(17, 17, 19, .5);
}

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
.stat small { color: var(--gray); }
.stat p { white-space: nowrap; line-height: 1.15; margin-top: 3px; }
.stat b {
  font-size: 28px; font-weight: 800; letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: 14px; color: var(--gray); margin-left: 4px; }
.round {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px;
  padding-top: 12px; border-top: 1px solid var(--hairline);
}
.round small { font-size: 9.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--gray); }
.round-bar { position: relative; height: 3px; border-radius: 3px; background: var(--hairline); overflow: hidden; }
.round-bar i { position: absolute; inset: 0; background: var(--ink); transform-origin: left; transform: scaleX(0); }
.round em { font: 500 9px var(--mono); font-style: normal; color: rgba(17, 17, 19, .5); font-variant-numeric: tabular-nums; }

.chart { display: block; width: 100%; height: 112px; margin-top: 10px; overflow: visible; }
.chart-grid { stroke: var(--hairline); stroke-width: 1; }
.chart-ref { stroke: rgba(17, 17, 19, .4); stroke-width: 1; stroke-dasharray: 3 3; }
.chart-tick { font: 500 8.5px var(--mono); fill: rgba(17, 17, 19, .45); letter-spacing: .04em; }
.chart-label { paint-order: stroke; stroke: #fff; stroke-width: 3px; stroke-linejoin: round; }
.chart-empty { font-size: 12px; fill: var(--gray); }
.legend { margin-top: 8px; font-size: 11.5px; color: var(--gray); line-height: 1.45; }
.legend i {
  display: inline-block; width: 14px; height: 2px; border-radius: 2px;
  vertical-align: middle; margin: -2px 6px 0 0;
}
.legend i + span { margin-right: 14px; }

.net { display: block; width: 100%; height: 260px; margin-top: 12px; }
.net-key {
  display: grid; grid-template-columns: 1fr 1fr; gap: 3px 12px;
  margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--hairline);
  font-size: 10.5px; color: var(--gray); line-height: 1.4;
}
.net-key div { display: flex; gap: 6px; }
.net-key dt { font-family: var(--mono); font-size: 9px; color: rgba(17, 17, 19, .5); min-width: 32px; padding-top: 1px; }

.ctl {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding-bottom: 14px; margin-bottom: 14px;
  border-bottom: 1px solid var(--hairline);
}
.stage:not([data-mode="watch"]) .only-watch,
.stage:not([data-mode="train"]) .only-train,
.stage:not([data-mode="drive"]) .only-drive,
.stage[data-mode="drive"] .not-drive { display: none; }
.chips { display: flex; gap: 6px; }
.chip {
  padding: 5px 11px; border-radius: 999px;
  font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums;
  background: #f4f4f5; color: #52525b;
  transition: background .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
}
.chip:hover { background: #ececef; }
.chip:active { transform: scale(.95); }
.chip[aria-pressed="true"] { background: #18181b; color: #fff; }
.keys {
  display: grid; grid-template-columns: auto auto; gap: 4px 10px;
  justify-items: end; align-items: center;
  font-size: 12px; color: var(--gray);
}
.keys span:nth-child(even) { justify-self: start; }
kbd {
  display: inline-grid; place-items: center;
  min-width: 22px; height: 22px; padding: 0 5px; margin-left: 4px;
  border-radius: 6px; background: #f4f4f5;
  font: 600 12px/1 var(--mono); color: var(--ink);
}
.brain-status { margin-top: 3px; font-size: 13px; font-weight: 600; line-height: 1.45; }
.links { display: flex; flex-wrap: wrap; gap: 2px 12px; margin-top: 8px; }
.links button {
  padding: 2px 0;
  font-size: 12px; color: #68686d;
  text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(104, 104, 109, .4);
  transition: color .2s var(--ease);
}
.links button:hover { color: var(--ink); }
.links button:disabled { opacity: .4; cursor: default; color: #68686d; }

.toast {
  position: absolute; top: 20px; left: 50%; z-index: 3;
  translate: -50% 0;
  padding: 8px 15px; border-radius: 999px;
  background: #fff; box-shadow: var(--card-shadow);
  font-size: 13px; font-weight: 600; white-space: nowrap;
  font-variant-numeric: tabular-nums;
  opacity: 0; transform: translateY(-8px) scale(.96);
  transition: opacity .3s var(--ease), transform .45s var(--ease);
  pointer-events: none;
}
.toast.show { opacity: 1; transform: none; }

/* the cluster readout: speed big, what the car is set to below it */
.readout {
  position: absolute; bottom: 20px; left: 50%; z-index: 2;
  translate: -50% 0;
  display: grid; grid-template-columns: 22px auto 22px; align-items: center; column-gap: 10px;
  padding: 9px 16px 10px; border-radius: 18px;
  background: rgba(255, 255, 255, .9);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  box-shadow: var(--card-shadow);
  pointer-events: none;
}
.readout-speed { text-align: center; line-height: 1; min-width: 64px; }
.readout-speed b {
  display: block; font-size: 34px; font-weight: 800; letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}
.readout-speed span { display: block; margin-top: 3px; font-size: 11px; color: var(--gray); }
.readout-set {
  grid-column: 1 / -1;
  display: flex; justify-content: center; align-items: baseline; gap: 5px;
  margin-top: 7px; padding-top: 6px; border-top: 1px solid var(--hairline);
  font-size: 9.5px; white-space: nowrap;
}
.readout-set span { font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--gray); }
.readout-set b { font-family: var(--mono); font-size: 10px; font-weight: 600; font-variant-numeric: tabular-nums; }
.readout-set em { margin-left: 6px; font-style: normal; font-size: 10.5px; color: #2563eb; font-weight: 600; }
.blinker { display: grid; place-items: center; }
.blinker svg { fill: rgba(17, 17, 19, .12); transition: fill .12s linear; }
.blinker.on svg { animation: blink .7s steps(1, end) infinite; }
@keyframes blink {
  0% { fill: #f59e0b; }
  57% { fill: rgba(17, 17, 19, .12); }
}
.car [data-signal] { fill: #f59e0b; opacity: 0; }
.car [data-signal].on { animation: lamp .7s steps(1, end) infinite; }
@keyframes lamp {
  0% { opacity: 1; }
  57% { opacity: 0; }
}

.touch {
  position: absolute; left: 16px; right: 16px; bottom: 16px; z-index: 2;
  display: none; justify-content: space-between;
}
.touch-pair { display: flex; gap: 10px; }
.touch button {
  width: 60px; height: 60px; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, .3), 0 1px 2px rgba(0, 0, 0, .06);
  touch-action: none; -webkit-user-select: none; user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform .3s var(--ease), background .2s var(--ease);
}
.touch button.down { transform: scale(.92); background: #fff; }
@media (pointer: coarse), (max-width: 680px) {
  .stage[data-mode="drive"] .touch { display: flex; }
  .stage[data-mode="drive"] .readout { bottom: auto; top: 16px; }
  .stage[data-mode="drive"] .toast { top: auto; bottom: 92px; }
}

.caption { margin-top: 18px; }
.caption h2 { font-size: 16.5px; font-weight: 600; }
.caption p { margin-top: 2px; font-size: 15px; color: var(--gray); font-variant-numeric: tabular-nums; }

/* below the stage the HUD leaves the canvas and stacks on the tile */
@media (max-width: 1099px) {
  .stage { height: auto; }
  .view { position: relative; height: min(64vh, 560px); min-height: 420px; }
  .hud {
    position: static;
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
    padding: 0 16px 16px;
  }
  .hud-col { width: auto; }
  .hud-col > :last-child { margin-top: 0; }
}
@media (max-width: 680px) {
  .intro { padding: 132px 20px 56px; }
  .bench { width: calc(100% - 40px); }
  .hud { grid-template-columns: 1fr; }
  .stage { border-radius: 20px; }
}

/* the anatomy tile, built like the portfolio's spec-sheet cards */
.feed { display: flex; justify-content: center; padding: 140px 16px 0; }
.feed figure { width: min(500px, 100%); }
.feed-tile {
  position: relative;
  min-height: 540px;
  display: grid; place-items: center;
  padding: 20px;
  background: var(--tile);
  border-radius: 22px;
  overflow: hidden;
}
.feed-caption { margin-top: 18px; }
.feed-caption h2 { font-size: 16.5px; font-weight: 600; }
.feed-caption p { margin-top: 2px; font-size: 15px; color: var(--gray); }

.anno-frame { position: relative; }
.car-frame { width: 80px; height: 195px; margin-top: 40px; }
.rays {
  position: absolute; left: 50%; top: 50%;
  width: 1px; height: 1px; overflow: visible;
  transition: opacity .35s var(--ease);
}
.rays g { transition: opacity .35s var(--ease); }
.rays line { stroke: var(--ink); stroke-width: 1; stroke-dasharray: 2 3; }
.rays rect { fill: #fff; stroke: #2563eb; stroke-width: 1.25; transition: opacity .2s var(--ease); }
.car {
  position: absolute; inset: 0; width: 100%; height: 100%;
  overflow: visible;
  filter: drop-shadow(0 16px 18px rgba(0, 0, 0, .2));
  transition: transform .5s var(--ease);
}
.car [data-wheel] { transform-box: fill-box; transform-origin: center; transition: transform .45s var(--ease); }
/* the spec sheet measures the car at rest: wheels straight while it is open */
.feed-anno:is(:hover, :focus-within) .car [data-wheel] { transform: none !important; }
.car [data-brakes] { opacity: 0; transition: opacity .15s var(--ease); }

.anno-item { position: absolute; display: flex; align-items: center; translate: 0 -50%; pointer-events: none; }
.anno-left { right: 100%; }
.anno-right { left: 100%; }
.anno-label {
  display: grid; grid-template-columns: auto 1fr; column-gap: 6px; row-gap: 1px;
  width: 128px; align-items: baseline;
  opacity: 0; transform: translateY(3px);
  transition: opacity .3s var(--ease), transform .45s var(--ease);
}
.anno-label em {
  grid-row: 1 / span 2; padding-top: 1px;
  font: normal 700 9px var(--mono); letter-spacing: .06em; color: var(--gray);
}
.anno-label b { font-size: 9.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; line-height: 1.25; }
.anno-label span { grid-column: 2; font-size: 10px; line-height: 1.35; color: var(--gray); }
.anno-left .anno-label { grid-template-columns: 1fr auto; text-align: right; }
.anno-left .anno-label em { grid-column: 2; }
.anno-left .anno-label b, .anno-left .anno-label span { grid-column: 1; }
.anno-line {
  display: block; flex: none; width: 34px; height: 1px; margin: 0 6px;
  background: #cfcfd6;
  transform: scaleX(0);
  transition: transform .45s var(--ease);
}
.anno-left .anno-line { transform-origin: right center; }
.anno-right .anno-line { transform-origin: left center; }
.anno-dot {
  display: block; flex: none; width: 5px; height: 5px; margin: 0 -2.5px;
  border-radius: 999px; background: var(--ink);
  opacity: 0; transform: scale(.4);
  transition: opacity .25s var(--ease), transform .4s var(--ease);
}
.anno-hint {
  position: absolute; left: 50%; bottom: 18px; translate: -50% 0;
  font-size: 10px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--gray); opacity: .75; white-space: nowrap;
  transition: opacity .3s var(--ease);
}
.on-touch { display: none; }
@media (hover: none) {
  .on-hover { display: none; }
  .on-touch { display: inline; }
}
.anno-item:nth-child(5) * { transition-delay: .05s; }
.anno-item:nth-child(6) * { transition-delay: .1s; }
.anno-item:nth-child(7) * { transition-delay: .15s; }
.anno-item:nth-child(8) * { transition-delay: .2s; }

.feed-anno:is(:hover, :focus-within) .anno-hint { opacity: 0; }
.feed-anno:is(:hover, :focus-within) .anno-dot { opacity: 1; transform: none; }
.feed-anno:is(:hover, :focus-within) .anno-line { transform: scaleX(1); }
.feed-anno:is(:hover, :focus-within) .anno-label { opacity: 1; transform: none; }
.feed-anno:is(:hover, :focus-within) .car { transform: scale(.97); }
.feed-anno:is(:hover, :focus-within) .rays { opacity: .1; }

/* construction lines: grid, outline, dimensions in meters */
.kl { position: absolute; inset: 0; pointer-events: none; }
.kl > * { opacity: 0; transition: opacity .35s var(--ease); }
.feed-anno:is(:hover, :focus-within) .kl > * { opacity: 1; }
.kl-grid {
  position: absolute; inset: 0; border-radius: 17px; overflow: hidden;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, .09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, .09) 1px, transparent 1px);
  background-size: 8px 8px;
}
.kl-box { position: absolute; inset: -4px; border: 1px solid rgba(17, 17, 19, .22); border-radius: 21px; }
.kl-corner {
  position: absolute; left: -4px; top: -4px; width: 30px; height: 30px;
  border-top: 1px solid rgba(17, 17, 19, .45);
  border-left: 1px solid rgba(17, 17, 19, .45);
  border-top-left-radius: 21px;
}
.kl-corner span, .kl-dim b {
  font-family: var(--mono); font-size: 8.5px; font-weight: 500; letter-spacing: .04em;
  color: rgba(17, 17, 19, .5);
}
.kl-corner span { position: absolute; left: -30px; top: -14px; }
.kl-dim { position: absolute; display: flex; align-items: center; gap: 5px; }
.kl-dim i {
  flex: 1; height: 1px; background: rgba(17, 17, 19, .3);
  transform: scaleX(0);
  transition: transform .45s var(--ease) .1s;
}
.kl-dim i:first-child { transform-origin: right center; }
.kl-dim i:last-child { transform-origin: left center; }
.feed-anno:is(:hover, :focus-within) .kl-dim i { transform: none; }
.kl-dim-top { left: -4px; right: -4px; top: -22px; }
.kl-dim-side { top: -4px; bottom: -4px; right: -26px; width: 18px; flex-direction: column; }
.kl-dim-side i { width: 1px; height: auto; transform: scaleY(0); }
.kl-dim-side i:first-child { transform-origin: center bottom; }
.kl-dim-side i:last-child { transform-origin: center top; }
.kl-axle { position: absolute; left: -14px; right: -14px; border-top: 1px dashed rgba(17, 17, 19, .3); }

@media (max-width: 420px) {
  .anno-label { width: 92px; }
  .anno-line { width: 18px; margin: 0 4px; }
  .kl-dim-side { right: -20px; width: 14px; }
}

/* text column below: steps and the trained driver's numbers */
.column { max-width: 420px; margin: 0 auto; padding: 140px 24px 0; }
.section-gap { margin-top: 72px; }
.rows { margin-top: 18px; list-style: none; }
.rows > * { display: flex; gap: 14px; padding: 14px 0; border-top: 1px solid var(--hairline); font-size: 15.5px; }
.rows > :last-child { border-bottom: 1px solid var(--hairline); }
.steps em { flex: none; padding-top: 3px; font: normal 600 10px var(--mono); letter-spacing: .06em; color: var(--gray); }
.facts .row { justify-content: space-between; align-items: baseline; }
.facts b { font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }

.footer { max-width: 420px; margin: 0 auto; padding: 140px 24px 180px; }
.f-block + .f-block { margin-top: 44px; }
.f-label { font-size: 16px; font-weight: 600; }
.f-value {
  display: block; width: fit-content; margin-top: 2px;
  font-size: 16px; color: var(--gray); text-decoration: none;
  transition: color .2s var(--ease);
}
a.f-value:hover { color: var(--ink); }
@media (max-width: 680px) {
  .feed, .column, .footer { padding-left: 20px; padding-right: 20px; }
}

.rise { animation: rise .65s var(--enter) both; }
.bench.rise { animation-delay: .08s; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }
/* app.js sets .reveals, so the text below stays readable if it never runs */
.reveal { transition: opacity .45s var(--ease), transform .45s var(--ease); }
.reveals .reveal:not(.in) { opacity: 0; transform: translateY(14px); }

/* nothing on the stage shows until the first frame is drawn */
.hud, .road, .readout { transition: opacity .45s var(--ease); }
.stage:not([data-ready]) :is(.hud, .road, .readout) { opacity: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0s !important; transition-delay: 0s !important; }
  .rise { animation: none; }
  .reveals .reveal:not(.in) { opacity: 1; transform: none; }
}