/*
 * Home page: the hero with the film, the three ways in (with the 3D devices), Vox Amelior, the other-apps teaser and
 * the call to action. The "Other apps" page (apps.html) shares this file for its sticky 3D device stage and case studies.
 * The film's player styles live in css/components/player.css.
 * Depends on css/design-system.css tokens.
 */

/* ══════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════ */

.hero {
  position: relative;
  padding-top: clamp(var(--space-12), 7vw, 5.5rem);
  isolation: isolate;
  overflow: hidden;
}

/* Desktop: the pitch on the left, the film on the right. Phones: the film comes right after the headline, so the
   first screen shows it */
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  grid-template-areas:
    "copy film"
    "more film";
  grid-template-rows: auto 1fr;
  align-items: center;
  column-gap: clamp(var(--space-8), 4vw, var(--space-16));
  min-height: min(640px, calc(100svh - var(--nav-h) - 180px));
}

.hero__copy {
  grid-area: copy;
  align-self: end;
}

.hero__more {
  grid-area: more;
  align-self: start;
}

.hero__status {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  padding: var(--space-2) var(--space-4) var(--space-2) var(--space-2);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--pill-bg);
  box-shadow: var(--edge);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--ink-2);
}

.hero__avatar img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
}

.hero__status-sep {
  width: 1px;
  height: 14px;
  background: var(--line-strong);
}

/* A notch under the display size, so the film beside it can be larger */
.hero__title {
  max-width: 11em;
  font-size: clamp(2.6rem, 1.4rem + 3.6vw, 4.4rem);
}

.hero__title .line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.14em;
  margin-bottom: -0.14em;
}

.hero__title .line > span {
  display: inline-block;
  /* Each line paints its own metal fill; a parent's text clip can't reach moved children */
}

.hero__lead {
  max-width: 33em;
  margin-top: var(--space-6);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-10);
}

/* The film: a short intro above it, the transcript underneath */
.hero__film {
  grid-area: film;
  margin: 0;
}

.hero__film-intro {
  max-width: 40em;
  margin-bottom: var(--space-4);
  font-size: var(--fs-sm);
  line-height: 1.55;
  color: var(--ink-2);
}

.hero__film-intro .eyebrow {
  margin-bottom: var(--space-2);
}

.hero__film-intro strong {
  font-weight: 600;
  color: var(--ink);
}

.hero__film-cap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  column-gap: var(--space-4);
  margin-top: var(--space-3);
  font-size: var(--fs-xs);
  color: var(--ink-3);
}

.hero__film-cap .transcript {
  margin-top: 0;
}

.hero__film-cap .transcript[open] {
  flex-basis: 100%;
}

/* Proof strip */
.proof {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(var(--space-8), 4vw, var(--space-12));
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--pill-bg);
  box-shadow: var(--edge);
}

.proof__item {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-6);
}

.proof__item + .proof__item {
  border-left: 1px solid var(--line);
}

.proof dd {
  margin: 0;
  font-size: clamp(2rem, 1.4rem + 2vw, 3rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
}

.proof dt {
  font-size: var(--fs-xs);
  line-height: 1.45;
  color: var(--ink-2);
}

@media (max-width: 860px) {
  .hero__grid {
    grid-template-columns: 1fr;
    grid-template-areas:
      "copy"
      "film"
      "more";
    grid-template-rows: auto;
    min-height: 0;
  }

  .hero__status {
    margin-bottom: var(--space-5);
  }

  .hero__film {
    margin-top: var(--space-6);
  }

  .hero__lead {
    margin-top: var(--space-8);
  }

  .hero__actions {
    margin-top: var(--space-6);
  }

  .hero__actions .btn {
    flex: 1 1 100%;
  }

  .proof__item {
    padding: var(--space-5) var(--space-3);
  }

  .proof dd {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .hero__status-name,
  .hero__status-sep {
    display: none;
  }
}

/* Phone frame around a real screenshot (fallbacks and the mobile case shots) */
.device {
  position: relative;
  padding: 2.6%;
  border-radius: 13% / 6%;
  background: linear-gradient(145deg, #3a3e46 0%, #16181d 30%, #0d0e12 70%, #2a2d34 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.25),
    0 40px 80px -30px rgba(21, 23, 27, 0.45);
}

.device img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 11% / 5%;
  object-fit: cover;
  object-position: top;
  background: #fff;
}

/* ══════════════════════════════════════════════════════════
   WORK: sticky 3D stage + case studies
   ══════════════════════════════════════════════════════════ */

.work__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(var(--space-8), 5vw, var(--space-16));
}

.work__stage {
  position: sticky;
  top: var(--nav-h);
  height: calc(100svh - var(--nav-h));
  max-height: 860px;
  order: 2;
}

.work__canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.work__stage::before {
  content: "";
  position: absolute;
  inset: 12% 8%;
  z-index: -1;
  border-radius: 50%;
  background: none;
  pointer-events: none;
}

.work__dots {
  position: absolute;
  left: 50%;
  bottom: var(--space-6);
  display: flex;
  gap: var(--space-2);
  transform: translateX(-50%);
}

.work__dots li {
  width: 26px;
  height: 3px;
  border-radius: 3px;
  background: var(--line-strong);
  transition: background-color var(--dur-2) var(--ease-out), width var(--dur-2) var(--ease-out);
}

.work__dots li.is-active {
  width: 44px;
  background: var(--accent);
}

.work__cases {
  order: 1;
}

.case {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100svh - var(--nav-h));
  padding-block: var(--space-16);
}

.case + .case {
  border-top: 1px solid var(--line);
}

.case__num {
  font-size: var(--fs-2xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.case__title {
  margin-top: var(--space-4);
  font-size: clamp(2.4rem, 1.6rem + 3vw, 4rem);
  font-weight: 650;
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.case__tag {
  margin-top: var(--space-3);
  font-size: var(--fs-lead);
  font-weight: 500;
  color: var(--ink);
}

.case__text {
  margin-top: var(--space-4);
  max-width: 40em;
  color: var(--ink-2);
}

.case__shots {
  display: none;
}

.case__built {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.case__built li {
  padding: 4px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: var(--glass);
  font-size: var(--fs-xs);
  color: var(--ink-2);
}

/* Two or three short, checkable facts per app */
.case__facts {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--ink-2);
}

.case__facts li {
  position: relative;
  padding-left: var(--space-5);
}

.case__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 2px;
  background: var(--accent);
}

.case__facts b {
  font-weight: 600;
  color: var(--ink);
}

.case__proof {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--line);
}

.case__proof > div {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  gap: var(--space-2);
}

.case__proof dd {
  margin: 0;
  font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2.2rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.case__proof dt {
  font-size: var(--fs-xs);
  line-height: 1.45;
  color: var(--ink-3);
}

.case__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-8);
}

.work__also {
  margin-top: var(--space-8);
  padding: var(--space-5) var(--space-6);
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  font-size: var(--fs-sm);
  color: var(--ink-2);
}

.work__also .mono {
  margin-right: var(--space-3);
  font-size: var(--fs-2xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* Without the 3D stage (small screens, no WebGL) the cases show real screenshots */
@media (max-width: 1023px) {
  .work__layout {
    grid-template-columns: 1fr;
  }

  .work__stage {
    display: none;
  }

  .case {
    min-height: 0;
    padding-block: var(--space-12);
  }

  .case__shots {
    display: flex;
    gap: var(--space-3);
    margin: var(--space-6) calc(var(--gutter) * -1) 0;
    padding: 0 var(--gutter) var(--space-2);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: var(--gutter);
    scrollbar-width: none;
  }

  .case__shots::-webkit-scrollbar {
    display: none;
  }

  .case__shots .device {
    flex: 0 0 min(46%, 220px);
    aspect-ratio: 540 / 1170;
    scroll-snap-align: start;
  }
}

html:not(.has-webgl) .work__stage {
  display: none;
}

html:not(.has-webgl) .work__layout {
  grid-template-columns: 1fr;
}

html:not(.has-webgl) .case {
  min-height: 0;
}

html:not(.has-webgl) .case__shots {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

html:not(.has-webgl) .case__shots .device {
  flex: 0 0 min(30%, 220px);
  aspect-ratio: 540 / 1170;
}

@media (max-width: 600px) {
  .case__proof {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .case__proof > div {
    display: grid;
    grid-template-columns: 7.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: var(--space-4);
  }
}

/* Sample podcast player */
.listen {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding: var(--space-5);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--card-fill);
  box-shadow: var(--edge);
}

.listen__play {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  box-shadow: none;
  transition: transform var(--dur-1) var(--ease-out);
}

.listen__play:hover {
  transform: scale(1.05);
}

.listen__play svg {
  width: 20px;
  height: 20px;
}

.listen__icon-play {
  margin-left: 3px;
}

.listen__icon-pause,
.listen.is-playing .listen__icon-play {
  display: none;
}

.listen.is-playing .listen__icon-pause {
  display: block;
}

.listen__title {
  font-weight: 600;
}

.listen__sub {
  margin-top: 2px;
  font-size: var(--fs-xs);
  color: var(--ink-3);
}

.listen__bar {
  position: relative;
  height: 6px;
  margin-top: var(--space-4);
  border-radius: 6px;
  background: rgba(21, 23, 27, 0.08);
  overflow: hidden;
  cursor: pointer;
}

.listen__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 100%;
  background: var(--accent);
  transform-origin: left;
  transform: scaleX(var(--p, 0));
}

.listen__chapters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.listen__chapters button {
  min-height: 32px;
  padding: 0 var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-size: var(--fs-2xs);
  color: var(--ink-2);
  transition: color var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}

.listen__chapters button:hover,
.listen__chapters button[aria-current="true"] {
  color: var(--ink);
  border-color: var(--accent-line);
}

.listen__time {
  padding-top: 2px;
  font-size: var(--fs-xs);
  color: var(--ink-3);
}

/* ══════════════════════════════════════════════════════════
   MOTION (off under prefers-reduced-motion)
   ══════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: no-preference) {
  .js .hero__title .line > span {
    animation: line-up 800ms var(--ease-out) both;
  }

  .js .hero__title .line:nth-child(2) > span {
    animation-delay: 100ms;
  }

  .js .hero__actions,
  .js .hero__status {
    animation: fade-up 700ms var(--ease-out) both;
  }

  .js .hero__actions {
    animation-delay: 240ms;
  }

  /* Section headings wipe in when their block reveals */
  .js .reveal .h2 {
    clip-path: inset(0 0 100% 0);
    transform: translateY(0.25em);
    transition: clip-path 900ms var(--ease-out), transform 900ms var(--ease-out);
  }

  .js .reveal.is-visible .h2 {
    clip-path: inset(-10% -2% -20% -2%);
    transform: none;
  }

  /* Case studies slide up as they become the active one */
  .js .case > * {
    opacity: 0.25;
    transform: translateY(14px);
    transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
  }

  .js .case.is-active > * {
    opacity: 1;
    transform: none;
  }

  .js .case.is-active > :nth-child(2) { transition-delay: 40ms; }
  .js .case.is-active > :nth-child(3) { transition-delay: 80ms; }
  .js .case.is-active > :nth-child(4) { transition-delay: 120ms; }
  .js .case.is-active > :nth-child(n + 5) { transition-delay: 160ms; }
}

@keyframes line-up {
  from {
    transform: translateY(105%);
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
}

/* Cursor spotlight on cards (main.js sets --mx/--my) */
.spot {
  position: relative;
}

.spot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), var(--spot), transparent 45%);
  opacity: 0;
  transition: opacity 300ms var(--ease-out);
  pointer-events: none;
}

.spot:hover::after {
  opacity: 1;
}

[data-stagger] > :nth-child(2) { --reveal-delay: 80ms; }
[data-stagger] > :nth-child(3) { --reveal-delay: 160ms; }
[data-stagger] > :nth-child(4) { --reveal-delay: 240ms; }

/* ══════════════════════════════════════════════════════════
   THE IDEA: three ways in
   ══════════════════════════════════════════════════════════ */

.ways__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
}

@media (max-width: 860px) {
  .ways__list {
    grid-template-columns: 1fr;
  }
}

/* The phone and glasses on a turntable, between the heading and the three cards. The 3D draws on the canvas at the
   anchor, a 6:5 box; the still shows until then */
.devices {
  margin: 0 0 var(--space-8);
}

.devices__stage {
  position: relative;
  height: clamp(380px, 42vw, 560px);
  /* Horizontal drags turn the devices; vertical swipes still scroll the page */
  touch-action: pan-y;
}

.devices__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s var(--ease-out);
}

.devices.is-3d .devices__canvas {
  opacity: 1;
}

.devices.is-3d .devices__stage {
  cursor: grab;
}

.devices.is-3d .devices__stage.is-dragging {
  cursor: grabbing;
}

/* The anchor sits low in the stage: the phone stands taller than the box the scene is fitted to */
.devices__anchor,
.devices__fallback {
  position: absolute;
  inset: 0;
  height: 100%;
  max-width: 100%;
  aspect-ratio: 6 / 5;
  margin: auto;
}

.devices__anchor {
  inset: auto 0 2%;
  height: 82%;
}

.devices__fallback {
  width: auto;
  object-fit: contain;
  transition: opacity 0.6s var(--ease-out);
}

.devices.is-3d .devices__fallback {
  opacity: 0;
  visibility: hidden;
}

@media (max-width: 860px) {
  .devices {
    margin-bottom: var(--space-6);
  }

  .devices__stage {
    height: min(440px, 96vw);
  }
}

.way {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--edge);
}

.way__num {
  font-size: var(--fs-2xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.way__title {
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: var(--lh-tight);
}

.way__text {
  color: var(--ink-2);
}

.way__choice {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--ink-2);
}

.way__choice b {
  color: var(--ink);
}


/* ══════════════════════════════════════════════════════════
   VOX AMELIOR
   ══════════════════════════════════════════════════════════ */

.vox__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  align-items: center;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
}

.vox__copy .lead {
  margin-top: var(--space-4);
}

.vox__features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5) var(--space-6);
  margin-top: var(--space-8);
}

.vox__features dt {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.vox__features dt::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  margin-right: var(--space-2);
  vertical-align: middle;
  border-radius: 2px;
  background: var(--accent);
}

.vox__features dd {
  margin: var(--space-1) 0 0;
  font-size: var(--fs-sm);
  color: var(--ink-2);
}

.vox__copy .case__facts {
  margin-top: var(--space-8);
}

/* A device turning on its turntable, with real screenshots as the fallback */
.showcase {
  margin: 0;
}

.showcase__stage {
  position: relative;
  height: clamp(460px, 46vw, 640px);
  touch-action: pan-y;
}

.showcase__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s var(--ease-out);
}

.showcase.is-3d .showcase__canvas {
  opacity: 1;
}

.showcase.is-3d .showcase__stage {
  cursor: grab;
}

.showcase__fallback {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
  align-items: center;
}

.showcase__fallback .device {
  aspect-ratio: 540 / 1200;
}

.showcase__fallback .device:nth-child(2) {
  transform: translateY(var(--space-8));
}

.showcase.is-3d .showcase__fallback {
  visibility: hidden;
}

.showcase__caption {
  margin-top: var(--space-2);
  font-size: var(--fs-xs);
  text-align: center;
  color: var(--ink-3);
}

.showcase__drag {
  display: none;
  color: var(--accent);
}

.showcase.is-3d .showcase__drag {
  display: inline;
}

@media (max-width: 960px) {
  .vox__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .vox__features {
    grid-template-columns: 1fr;
  }

  .showcase__stage {
    height: 420px;
  }
}

/* ══════════════════════════════════════════════════════════
   OTHER APPS: teaser on the home page
   ══════════════════════════════════════════════════════════ */

.more__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.more__card {
  display: grid;
  grid-template-columns: 34% 1fr;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--edge);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-out);
}

.more__card:hover {
  border-color: var(--line-hover);
  transform: translateY(-2px);
}

.more__shot {
  aspect-ratio: 540 / 1170;
}

.more__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.more__title {
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: var(--lh-tight);
}

.more__body p:not(.way__num) {
  color: var(--ink-2);
}

@media (max-width: 960px) {
  .more__grid {
    grid-template-columns: 1fr;
  }
}

/* ══════════════════════════════════════════════════════════
   OTHER APPS PAGE (apps.html)
   ══════════════════════════════════════════════════════════ */

.apps-head {
  padding-top: clamp(var(--space-12), 7vw, 5.5rem);
}

.apps-head .lead {
  max-width: 40em;
  margin-top: var(--space-6);
}

.case__lede {
  margin-top: var(--space-5);
  font-size: var(--fs-lead);
  line-height: var(--lh-snug);
  color: var(--ink);
}

.case__text + .case__text {
  margin-top: var(--space-3);
}

/* Three tiers of AI, from private to most capable */
.tiers {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-6);
  list-style: none;
}

.tiers li {
  display: grid;
  grid-template-columns: 8.5em 1fr;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
  font-size: var(--fs-sm);
  color: var(--ink-2);
}

.tiers b {
  color: var(--ink);
}

.tiers .tiers__next {
  border-style: dashed;
}

.tag-next {
  display: inline-block;
  margin-left: var(--space-2);
  padding: 0 var(--space-2);
  border: 1px solid var(--accent-line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.imperatives {
  margin-top: var(--space-5);
  font-size: var(--fs-h3);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: var(--lh-tight);
}

@media (max-width: 560px) {
  .tiers li {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
}

/* Keeps a short phrase on one line */
.nowrap {
  white-space: nowrap;
}

/* ══════════════════════════════════════════════════════════
   LEADING THE WAY: next links and the on-page rail
   ══════════════════════════════════════════════════════════ */

/* Every section ends by pointing at the next one: a quiet text link, right-aligned */
.next-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: fit-content;
  margin: var(--space-10) 0 0 auto;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-2);
  text-decoration: none;
}

.next-link:hover {
  color: var(--ink);
}

.next-link .mono {
  font-size: var(--fs-2xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}

.next-link svg {
  width: 15px;
  height: 15px;
  color: var(--accent);
}

/* The rail: where you are on the page, and where you can jump (wide screens only) */
.rail {
  position: fixed;
  top: 50%;
  right: clamp(12px, 1.6vw, 28px);
  z-index: 20;
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transform: translate(8px, -50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-out);
}

.rail.is-shown {
  opacity: 1;
  transform: translate(0, -50%);
  pointer-events: auto;
}

.rail a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--r-sm);
  font-size: var(--fs-xs);
  color: var(--ink-3);
  text-decoration: none;
  white-space: nowrap;
}

.rail a .mono {
  font-size: var(--fs-2xs);
}

.rail a:hover {
  color: var(--ink);
}

.rail a[aria-current] {
  color: var(--ink);
  background: var(--accent-soft);
}

.rail a[aria-current] .mono {
  color: var(--accent);
}

/* Compact by default: numbers only, with each label shown beside it on hover or focus */
.rail__label {
  position: absolute;
  right: calc(100% + var(--space-2));
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--ink);
  opacity: 0;
  transform: translateX(4px);
  pointer-events: none;
  transition: opacity var(--dur-1) var(--ease-out), transform var(--dur-1) var(--ease-out);
}

.rail a {
  position: relative;
}

.rail a:hover .rail__label,
.rail a:focus-visible .rail__label {
  opacity: 1;
  transform: none;
}

@media (min-width: 1360px) {
  .rail {
    display: flex;
  }
}

/* Wide screens have room for the labels themselves */
@media (min-width: 1680px) {
  .rail__label {
    position: static;
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    opacity: 1;
    transform: none;
  }
}

/* In-page switcher on the other-apps page */
.switcher {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-8);
}

/* Other apps: each app's copy beside its own turning device, which stays in view while you read */
.app {
  display: block;
  min-height: 0;
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}

.app__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
}

.app__visual {
  position: sticky;
  top: calc(var(--nav-h) + var(--space-6));
}

.app__visual .showcase__stage {
  height: clamp(480px, 50vw, 700px);
}

@media (max-width: 960px) {
  .app__grid {
    grid-template-columns: 1fr;
  }

  .app__visual {
    position: relative;
    top: 0;
    order: -1;
  }
}

/* Vox Amelior's features light up as the matching layer of the phone opens */
.vox__features [data-at] {
  transition: opacity var(--dur-3) var(--ease-out);
}

.js .vox.is-scrubbed .vox__features [data-at]:not(.is-lit) {
  opacity: 0.45;
}