/* NEURAL LENS shell: page, top bar, buttons, home, lab frame, Ada. */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--page);
  background-image: radial-gradient(var(--page-dots) 1.3px, transparent 1.6px);
  background-size: 22px 22px;
  color: var(--cream);
  font-family: var(--font-ui);
  font-size: var(--step-0);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, canvas { display: block; max-width: 100%; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
button { font: inherit; }

:focus-visible { outline: 3px solid var(--sky); outline-offset: 3px; border-radius: 8px; }
#view { display: block; overflow-x: clip; }
#view:focus { outline: none; }

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

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--sun); color: var(--ink); padding: 8px 14px;
  border: var(--stroke) solid var(--ink); border-radius: 999px; font-weight: 800;
}
.skip-link:focus { top: 12px; }

.noscript { padding: 40px; text-align: center; font-size: var(--step-1); }

/* Outlined display type, used for titles outside the kinetic system */
.outlined {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0.01em;
  text-shadow:
    -2px -2px 0 var(--ink), 2px -2px 0 var(--ink), -2px 2px 0 var(--ink), 2px 2px 0 var(--ink),
    0 -2px 0 var(--ink), 0 2px 0 var(--ink), -2px 0 0 var(--ink), 2px 0 0 var(--ink),
    0 5px 0 var(--ink);
}

/* ---------- Buttons ---------- */

.btn {
  --btn-bg: var(--sun);
  --btn-fg: var(--ink);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  min-height: 44px;
  padding: 0.7em 1.25em 0.6em;
  font: 800 var(--step-0)/1.1 var(--font-ui);
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: var(--stroke) solid var(--ink);
  border-radius: 999px;
  box-shadow: var(--pop);
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition-property: transform, box-shadow, background-color;
  transition-duration: 0.09s, 0.09s, 0.15s;
  transition-timing-function: var(--ease-out);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 0 var(--ink); }
.btn:active { transform: translateY(4px); box-shadow: var(--pop-pressed); }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; transform: none; box-shadow: var(--pop-pressed); }
.btn--big { font-size: var(--step-1); padding: 0.75em 1.5em 0.65em; }
.btn--cream { --btn-bg: var(--cream); }
.btn--lab { --btn-bg: var(--lab-a); --btn-fg: var(--lab-on-a); }
.btn svg { width: 1.2em; height: 1.2em; flex: none; }

.icon-btn {
  display: grid; place-items: center;
  width: 44px; height: 44px; padding: 0;
  color: var(--ink); background: var(--cream);
  border: var(--stroke) solid var(--ink); border-radius: 14px;
  box-shadow: 0 4px 0 var(--ink);
  cursor: pointer;
  transition-property: transform, box-shadow;
  transition-duration: 0.09s;
}
.icon-btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--ink); }
.icon-btn svg { width: 24px; height: 24px; }

/* ---------- Top bar ---------- */

.topbar {
  position: sticky; top: 0; z-index: 30;
  display: flex; align-items: center; gap: 16px;
  padding: 10px clamp(12px, 2vw, 24px);
  background: var(--page-deep);
  border-bottom: var(--stroke) solid var(--ink);
  box-shadow: 0 4px 0 rgba(26, 16, 51, 0.35);
}

.brand {
  display: flex; align-items: center; gap: 10px; flex: none;
  color: var(--sun);
  font-size: 1.45rem;
  text-decoration: none;
  white-space: nowrap;
}
.brand__mark { width: 40px; height: 40px; }

.lab-tabs {
  display: flex; gap: 8px; flex: 1; min-width: 0;
  overflow-x: auto; scrollbar-width: none;
  padding: 4px 2px 8px;
}
.lab-tabs::-webkit-scrollbar { display: none; }

.lab-tab {
  position: relative;
  display: flex; align-items: center; gap: 7px; flex: none;
  min-height: 42px;
  padding: 4px 13px 3px 5px;
  color: var(--cream);
  background: var(--page);
  border: var(--stroke) solid var(--ink);
  border-radius: 999px;
  box-shadow: 0 4px 0 var(--ink);
  font-weight: 800; font-size: var(--step--1);
  text-decoration: none; white-space: nowrap;
  transition-property: background-color, transform, box-shadow;
  transition-duration: 0.15s, 0.09s, 0.09s;
}
.lab-tab:hover { background: color-mix(in oklab, var(--lab-a) 28%, var(--page)); }
.lab-tab:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--ink); }
.lab-tab[aria-current="page"] { background: var(--lab-a); color: var(--lab-on-a); }
.lab-tab__icon {
  display: grid; place-items: center; flex: none;
  width: 30px; height: 30px;
  background: var(--lab-a); color: var(--lab-on-a);
  border: 2px solid var(--ink); border-radius: 50%;
}
.lab-tab[aria-current="page"] .lab-tab__icon { background: var(--cream); color: var(--ink); }
.lab-tab__icon svg { width: 20px; height: 20px; }
.lab-tab__got {
  position: absolute; top: -6px; right: -4px;
  width: 18px; height: 18px;
  display: grid; place-items: center;
  background: var(--pink); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 50%;
  font: 900 11px/1 var(--font-ui);
}

.topbar__right { display: flex; align-items: center; gap: 10px; flex: none; }

.aha-counter {
  display: flex; align-items: center; gap: 8px;
  min-height: 44px; padding: 4px 12px 2px;
  color: var(--ink); background: var(--cream);
  border: var(--stroke) solid var(--ink); border-radius: 14px;
  box-shadow: 0 4px 0 var(--ink);
}
.aha-counter__label { font-family: var(--font-display); font-size: 1.15rem; color: var(--pink); }
.aha-counter__dots { display: flex; gap: 3px; }
.aha-counter__dot {
  width: 11px; height: 11px; border-radius: 50%;
  border: 2px solid var(--ink); background: transparent;
}
.aha-counter__dot.is-got { background: var(--pink); }
.aha-counter__num { font: 800 1rem/1 var(--font-ui); font-variant-numeric: tabular-nums; }

/* ---------- Home ---------- */

.home { max-width: 1240px; margin: 0 auto; padding: clamp(20px, 4vw, 48px) clamp(16px, 3vw, 32px) 64px; }

.hero {
  position: relative; isolation: isolate;
  display: grid; grid-template-columns: minmax(0, 1fr) 330px; align-items: center; gap: 24px 40px;
  padding: clamp(12px, 3vw, 40px) 0 clamp(28px, 5vw, 56px);
}
.hero__rays {
  position: absolute; z-index: -1; left: 35%; top: 50%;
  width: 1400px; height: 1400px; margin: -700px 0 0 -700px;
  background: repeating-conic-gradient(from 0deg,
    rgba(255, 255, 255, 0.10) 0deg, rgba(255, 255, 255, 0) 7deg,
    rgba(255, 255, 255, 0) 13deg, rgba(255, 255, 255, 0.10) 20deg);
  -webkit-mask-image: radial-gradient(circle, #000 0, rgba(0, 0, 0, 0.6) 22%, transparent 55%);
          mask-image: radial-gradient(circle, #000 0, rgba(0, 0, 0, 0.6) 22%, transparent 55%);
  animation: spin 90s linear infinite;
  pointer-events: none;
}
.hero__title {
  margin: 0;
  font-family: var(--font-display); font-weight: 400;
  font-size: var(--step-hero); line-height: 0.92;
  color: var(--sun);
  display: flex; flex-wrap: wrap; gap: 0 0.28em;
}
.hero__tagline {
  margin: 0.5em 0 0;
  font-size: var(--step-2); font-weight: 800; line-height: 1.15;
  color: var(--cream);
}
.hero__blurb { margin: 0.6em 0 0; max-width: 46ch; font-size: var(--step-1); font-weight: 600; color: rgba(255, 244, 224, 0.86); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero .ada-slot { width: 100%; }

.labs-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 16px; margin: 8px 0 18px; }
.labs-head h2 { margin: 0; font-size: var(--step-3); color: var(--cream); }
.labs-head p { margin: 0; font-weight: 700; color: rgba(255, 244, 224, 0.8); }

.labs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 26px 24px; }

.lab-card {
  position: relative;
  display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto 1fr; gap: 2px 16px;
  min-height: 190px;
  padding: 20px 20px 22px;
  color: var(--lab-on-a); background: var(--lab-a);
  border: var(--stroke) solid var(--ink); border-radius: var(--radius-l);
  box-shadow: var(--pop);
  text-decoration: none;
  transform: rotate(var(--tilt, 0deg));
  transition-property: transform, box-shadow;
  transition-duration: 0.28s, 0.15s;
  transition-timing-function: var(--ease-spring), var(--ease-out);
}
.lab-card:hover { transform: rotate(0deg) translateY(-5px); box-shadow: 0 11px 0 var(--ink); }
.lab-card:active { transform: translateY(4px) scale(0.98); box-shadow: var(--pop-pressed); transition-duration: 0.08s; }
.lab-card__icon {
  grid-row: 1 / span 3;
  display: grid; place-items: center;
  width: 72px; height: 72px;
  background: var(--cream); color: var(--ink);
  border: var(--stroke) solid var(--ink); border-radius: 22px;
  box-shadow: 0 4px 0 var(--ink);
}
.lab-card__icon svg { width: 46px; height: 46px; }
.lab-card__num { padding-right: 58px; font-weight: 800; font-size: var(--step--1); opacity: 0.85; }
.lab-card__name { font-family: var(--font-display); font-size: var(--step-2); line-height: 1; }
.lab-card__hook { margin-top: 6px; font-weight: 700; line-height: 1.3; }

.stamp {
  position: absolute; right: 12px; top: -18px;
  display: grid; place-items: center;
  width: 60px; height: 60px;
  font: 400 1rem/1 var(--font-display);
  color: var(--ink);
  border: 3px dashed rgba(26, 16, 51, 0.55); border-radius: 50%;
  background: rgba(255, 244, 224, 0.35);
  transform: rotate(12deg);
}
.stamp.is-got {
  color: var(--ink); background: var(--pink);
  border: var(--stroke) solid var(--ink);
  box-shadow: 0 4px 0 var(--ink);
}

/* ---------- Lab frame ---------- */

.lab { max-width: 1360px; margin: 0 auto; padding: clamp(14px, 2.4vw, 26px) clamp(12px, 2.4vw, 28px) 48px; }

.lab__head { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.lab__icon {
  display: grid; place-items: center; flex: none;
  width: 66px; height: 66px;
  background: var(--lab-a); color: var(--lab-on-a);
  border: var(--stroke) solid var(--ink); border-radius: 20px;
  box-shadow: var(--pop);
}
.lab__icon svg { width: 42px; height: 42px; }
.lab__num { margin: 0; font-weight: 800; color: var(--lab-b); }
.lab__title { margin: 0; font-size: var(--step-3); line-height: 1; color: var(--cream); }

.steps { display: flex; gap: 8px; margin: 0 0 0 auto; padding: 0; list-style: none; }
.steps li {
  padding: 0.35em 0.95em 0.25em;
  font-weight: 800;
  color: rgba(255, 244, 224, 0.75); background: var(--page-deep);
  border: var(--stroke) solid var(--ink); border-radius: 999px;
  transition-property: background-color, color, transform;
  transition-duration: 0.2s;
}
.steps li.is-done { color: var(--ink); background: var(--cream); }
.steps li.is-on {
  color: var(--lab-on-a); background: var(--lab-a);
  box-shadow: 0 4px 0 var(--ink);
  transform: translateY(-2px);
}

.lab__body { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 22px; align-items: start; }
.lab__body > .ada-slot { position: sticky; top: 92px; }

.lab__stage {
  position: relative; overflow: hidden;
  min-height: 580px;
  color: var(--lab-on-stage); background: var(--lab-stage);
  border: var(--stroke) solid var(--ink); border-radius: var(--radius-l);
  box-shadow: 0 8px 0 var(--ink);
}

.lab__foot { display: flex; justify-content: flex-end; margin-top: 22px; }
.next-btn[hidden] { display: none; }

.construction {
  display: grid; place-content: center; justify-items: center; gap: 14px;
  min-height: 580px; padding: 32px; text-align: center;
}
.construction__sign {
  padding: 14px 22px 10px;
  font: 400 var(--step-2)/1 var(--font-display);
  color: var(--ink);
  background: repeating-linear-gradient(-45deg, var(--sun) 0 18px, var(--ink) 18px 36px);
  border: var(--stroke) solid var(--ink); border-radius: 14px;
  box-shadow: var(--pop);
}
.construction__sign span { display: block; padding: 8px 16px 4px; background: var(--sun); border-radius: 8px; }
.construction p { margin: 0; max-width: 40ch; font-weight: 700; }

/* ---------- Ada ---------- */

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

.bubble {
  position: relative;
  width: 100%; min-height: 5.2em;
  padding: 14px 16px 12px;
  color: var(--ink); background: var(--paper);
  border: var(--stroke) solid var(--ink); border-radius: 22px;
  box-shadow: var(--pop);
  font-weight: 700; line-height: 1.38;
}
.bubble::after {
  content: ""; position: absolute; left: 44px; bottom: -14px;
  width: 22px; height: 22px;
  background: var(--paper);
  border-right: var(--stroke) solid var(--ink); border-bottom: var(--stroke) solid var(--ink);
  transform: rotate(45deg) skew(8deg, 8deg);
}
.bubble__name { display: block; margin-bottom: 2px; font-family: var(--font-display); font-weight: 400; color: var(--pink); }
.bubble__text { margin: 0; min-height: 2.8em; }
.bubble__text em { font-style: normal; color: var(--grape); }

.ada { width: 128px; margin-left: 10px; filter: drop-shadow(0 6px 0 var(--ink)); }
.hero .ada { width: 168px; }
.ada svg { width: 100%; height: auto; overflow: visible; }
.ada__float { animation: ada-bob 2.6s ease-in-out infinite alternate; transform-origin: 50% 100%; }
.ada__eyes { transform-box: fill-box; transform-origin: 50% 50%; animation: ada-blink 5s infinite; }
.ada__bulb { transition: fill 0.2s; }
.ada.is-talking .ada__bulb { fill: var(--pink); animation: ada-glow 0.5s ease-in-out infinite alternate; }
.ada__arm-r { transform-box: fill-box; transform-origin: 15% 85%; }
.ada.is-waving .ada__arm-r { animation: ada-wave 0.45s ease-in-out 3 alternate; }

/* Moods: one face group is visible at a time */
.ada__face { display: none; }
.ada[data-mood="happy"] .ada__face--happy,
.ada[data-mood="excited"] .ada__face--excited,
.ada[data-mood="thinking"] .ada__face--thinking,
.ada[data-mood="surprised"] .ada__face--surprised,
.ada[data-mood="sleepy"] .ada__face--sleepy { display: inline; }
.ada.is-pop { animation: ada-pop 0.5s var(--ease-spring); }

@keyframes ada-bob { from { transform: translateY(0); } to { transform: translateY(-7px); } }
@keyframes ada-blink { 0%, 92%, 100% { transform: scaleY(1); } 95% { transform: scaleY(0.1); } }
@keyframes ada-glow { from { filter: none; } to { filter: drop-shadow(0 0 6px var(--pink)); } }
@keyframes ada-wave { from { transform: rotate(0deg); } to { transform: rotate(-28deg); } }
@keyframes ada-pop { 0% { transform: scale(1); } 40% { transform: scale(1.12) rotate(-4deg); } 100% { transform: scale(1); } }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- AHA moment ---------- */

.aha-layer { position: fixed; inset: 0; z-index: 60; pointer-events: none; overflow: hidden; }
.aha__particles { position: absolute; inset: 0; width: 100%; height: 100%; }
.aha__rays, .aha__banner { display: none; }
.aha-layer.is-on .aha__rays, .aha-layer.is-on .aha__banner { display: flex; }
.aha__rays { position: absolute; width: 0; height: 0; }
.aha__rays > div {
  position: absolute; left: -760px; top: -760px; width: 1520px; height: 1520px;
  border-radius: 50%;
  background: repeating-conic-gradient(from 0deg,
    rgba(255, 210, 63, 0.38) 0deg, rgba(255, 210, 63, 0) 6deg,
    rgba(255, 210, 63, 0) 14deg, rgba(255, 210, 63, 0.38) 20deg);
  -webkit-mask-image: radial-gradient(circle, #000 0, rgba(0, 0, 0, 0.55) 25%, transparent 60%);
          mask-image: radial-gradient(circle, #000 0, rgba(0, 0, 0, 0.55) 25%, transparent 60%);
  mix-blend-mode: screen;
  animation: spin 16s linear infinite;
}
.aha__rays > div + div {
  background: repeating-conic-gradient(from 9deg,
    rgba(255, 79, 163, 0.28) 0deg, rgba(255, 79, 163, 0) 8deg,
    rgba(255, 79, 163, 0) 24deg, rgba(255, 79, 163, 0.28) 32deg);
  animation-duration: 26s; animation-direction: reverse;
}
.aha__banner {
  position: absolute; transform: translateX(-50%);
  flex-direction: column; align-items: center; text-align: center;
  width: max-content;
}
.aha__kicker {
  display: inline-block; margin-bottom: 10px; padding: 6px 16px 2px;
  font: 400 1.7rem/1 var(--font-display);
  color: var(--ink); background: var(--pink);
  border: var(--stroke) solid var(--ink); border-radius: 14px;
  box-shadow: 0 5px 0 var(--ink);
  transform: rotate(-8deg);
}
.aha__headline {
  margin: 0;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0 0.3em;
  font: 400 clamp(2rem, 1.1rem + 3.2vw, 4.3rem)/0.98 var(--font-display);
  color: var(--sun);
}
.aha__stamp {
  position: fixed; left: 0; top: 0; z-index: 2;
  display: grid; place-items: center;
  width: 80px; height: 80px;
  font: 400 1.35rem/1 var(--font-display);
  color: var(--ink); background: var(--pink);
  border: 4px solid var(--ink); border-radius: 50%;
  box-shadow: 0 5px 0 var(--ink);
}
.aha-counter.is-bump { animation: bump 0.45s var(--ease-spring); }

/* The 6/6 finale */
.finale {
  position: fixed; inset: 0; z-index: 70;
  display: grid; place-items: center; padding: 16px;
  background: rgba(26, 16, 51, 0.72);
  overflow-y: auto;
}
.finale__card {
  width: min(760px, 100%); padding: clamp(18px, 3vw, 32px);
  text-align: center; color: var(--ink);
  background: var(--paper);
  border: 4px solid var(--ink); border-radius: var(--radius-l);
  box-shadow: 0 10px 0 var(--ink);
}
.finale__kicker {
  display: inline-block; margin: 0 0 8px; padding: 6px 18px 2px;
  font: 400 1.6rem/1 var(--font-display);
  background: var(--pink); border: var(--stroke) solid var(--ink); border-radius: 14px;
  box-shadow: 0 5px 0 var(--ink); transform: rotate(-6deg);
}
.finale__title {
  margin: 4px 0 6px;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 0 0.3em;
  font: 400 clamp(2rem, 1.2rem + 3.4vw, 3.8rem)/1 var(--font-display);
}
.finale__sub { margin: 0 0 16px; font-weight: 700; }
.finale__stamps { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 10px; margin: 0 0 18px; padding: 0; list-style: none; text-align: left; }
.finale__stamps li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; font-weight: 700; line-height: 1.25;
  background: color-mix(in oklab, var(--lab-a) 22%, white);
  border: var(--stroke) solid var(--ink); border-radius: 14px;
  box-shadow: 0 4px 0 var(--ink);
}
.finale__stamps b { display: block; font: 400 1.05rem/1.1 var(--font-display); }
.finale__stamps small { font-size: 0.85rem; font-weight: 800; letter-spacing: 0.02em; }
.finale__icon {
  flex: none; display: grid; place-items: center; width: 44px; height: 44px;
  background: var(--lab-a); border: var(--stroke) solid var(--ink); border-radius: 12px;
}
.finale__icon svg { width: 30px; height: 30px; }
.finale__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }
@keyframes bump { 40% { transform: scale(1.18) rotate(-3deg); } }

/* ---------- Kinetic letters ---------- */

.kword { display: inline-flex; white-space: nowrap; }
.kl { position: relative; z-index: 0; display: inline-block; color: var(--kl-fill, currentColor); }
.kl::before, .kl::after {
  content: attr(data-l);
  position: absolute; left: 0; top: 0; z-index: -1;
  color: var(--ink);
  -webkit-text-stroke: 0.16em var(--ink);
  pointer-events: none;
}
.kl::before { transform: translateY(0.085em); }
.kl.is-impact { text-shadow: -0.045em 0 0 var(--pink), 0.045em 0 0 var(--sky); }

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .lab-tab__name { display: none; }
  .lab-tab { padding: 4px; }
}
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .lab__body { grid-template-columns: 1fr; }
  .lab__body > .ada-slot { position: static; }
  .ada-root { flex-direction: row-reverse; align-items: flex-end; }
  .bubble::after { left: -13px; bottom: 26px; transform: rotate(135deg) skew(8deg, 8deg); }
  .ada, .hero .ada { width: 96px; margin: 0; flex: none; }
  .steps { margin-left: 0; }
  .lab__stage, .construction { min-height: 460px; }
}
@media (max-width: 560px) {
  .brand__name { display: none; }
  .aha-counter__dots { display: none; }
  .topbar { gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .hero__rays { animation: none; }
}