/* Two faces: Oxanium for the headings under the h1s, IBM Plex Sans for everything else, h1s included.
   Both self-hosted, variable, OFL. */

@font-face {
  font-family: "IBM Plex Sans";
  src: url("assets/fonts/ibm-plex-sans-latin-wght.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("assets/fonts/ibm-plex-sans-latin-ext-wght.woff2") format("woff2");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Oxanium";
  src: url("assets/fonts/oxanium-latin-wght.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "Oxanium";
  src: url("assets/fonts/oxanium-latin-ext-wght.woff2") format("woff2");
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  --bg: #0b0c0f;
  --surface: #15171c;
  --border: #2a2e36;
  --line: #3a3f49;
  --ink: #edeff2;
  --muted: #9ba1ab;
  --subtle: #858c99;
  --amber: #ffc61a;
  --amber-hover: #e6b217;
  --amber-tint: #2a2410;
  /* Who it's for's light half: ink as a ground, graphite as its text. */
  --light-muted: #4a505b;
  --on-amber: #0b0c0f;
  --teal: #5fb3c4;
  --teal-tint: #12252a;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Oxanium", "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  /* Five sizes carry the page: display, heading, lead, body, small. */
  --fs-display: clamp(1.625rem, 0.68rem + 4.38vw, 4.75rem);
  --fs-h2: clamp(1.5rem, 0.9rem + 2.6vw, 3.25rem);
  --fs-lead: clamp(1.125rem, 1.05rem + 0.35vw, 1.3125rem);
  --fs-body: 1.0625rem;
  --fs-small: 0.875rem;
  /* Square-cornered controls, panels and pictures; speech keeps a bubble. */
  --r: 4px;
  --r-bubble: 14px;
  /* One pair of tight margins; the page runs wide and only running text is held to a measure. */
  --gutter: clamp(1rem, 2.4vw, 2rem);
  --page: 88rem;
  --bar-h: 4rem;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dash-y: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1' height='11' viewBox='0 0 1 11' preserveAspectRatio='none'%3E%3Crect width='1' height='6'/%3E%3C/svg%3E");
  --dash-x: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='1' viewBox='0 0 11 1' preserveAspectRatio='none'%3E%3Crect width='6' height='1'/%3E%3C/svg%3E");
  color-scheme: dark;
}

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

html {
  scroll-padding-top: calc(var(--bar-h) + 1.5rem);
  scrollbar-color: var(--line) var(--bg);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 var(--fs-body)/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

::selection {
  background: var(--amber);
  color: var(--on-amber);
}

:focus {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

h1,
h2,
h3,
p,
ul,
ol,
dl,
dd,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

h1,
h2,
h3 {
  font-weight: 600;
  text-wrap: balance;
}

/* Each page's h1 stays in the body's Plex; the section and card headings beneath it take Oxanium. */
h2,
h3 {
  font-family: var(--display);
}

p,
dd,
li,
figcaption {
  text-wrap: pretty;
}

a {
  color: inherit;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

[hidden] {
  display: none !important;
}

.sr {
  position: absolute;
  width: 1px;
  height: 1px; /* taste-skill-ignore: visually hidden text, not a rule */
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: var(--gutter);
  top: 0.5rem;
  z-index: 20;
  transform: translateY(-160%);
  background: var(--amber);
  color: var(--on-amber);
  padding: 0.6rem 0.9rem;
  border-radius: var(--r);
  font-weight: 600;
  text-decoration: none;
}

.skip:focus {
  transform: none;
}

.wrap {
  width: 100%;
  max-width: calc(var(--page) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.lede {
  color: var(--ink);
  font-size: var(--fs-lead);
  line-height: 1.5;
  max-width: 54ch;
}

/* Logo: OTTO the character in amber, its TT face cut out. The lockup sets OTTO beside it,
   outlined from Oxanium ExtraBold and tracked -5%. */

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.logo {
  display: block;
  flex: none;
  height: auto;
  aspect-ratio: 450 / 487.5;
  fill: var(--amber);
}

.lockup {
  display: block;
  flex: none;
  width: auto;
  height: 1.75rem;
  aspect-ratio: 1828.09 / 487.5;
}

.lockup-logo {
  fill: var(--amber);
}

.lockup-letters {
  fill: var(--ink);
}

/* Buttons */

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 3.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--r);
  border: 0;
  font: 600 var(--fs-body)/1.2 var(--sans);
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), transform 0.12s var(--ease);
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn .i {
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.25s var(--ease);
}

.btn:hover .i {
  transform: translateX(3px);
}

.btn-primary {
  background: var(--amber);
  color: var(--on-amber);
}

.btn-primary:hover {
  background: var(--amber-hover);
}

.btn-sm {
  min-height: 2.5rem;
  padding: 0.45rem 0.95rem;
  font-size: var(--fs-small);
}

.btn-block {
  width: 100%;
}

/* Quiet: the way into the room, a graphite fill, so the amber fill stays with the pilot. */
.btn-ghost {
  background: var(--border);
  color: var(--ink);
}

.btn-ghost:hover {
  background: var(--line);
}

/* Secondary: compact, no fill, an amber line around amber words. For small asides beside the content,
   like Where is OTTO?; the one outlined box on the page. */
.btn-secondary {
  min-height: 2rem;
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--amber);
  background: transparent;
  color: var(--amber);
  font-size: var(--fs-small);
  font-weight: 500;
}

.btn-secondary:hover {
  background: var(--amber-tint);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary:disabled:hover {
  background: var(--amber);
}

/* Bar */

.bar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 94%, transparent);
}

.bar-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--amber);
  transform: scaleX(var(--read, 0));
  transform-origin: left;
  pointer-events: none;
}

.bar-in {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: var(--bar-h);
  max-width: calc(var(--page) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
  min-height: 2.75rem;
}

.nav {
  display: none;
  gap: 0.25rem;
}

.nav a {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--fs-small);
  padding: 0.5rem 0.7rem;
  border-radius: var(--r);
  transition: color 0.18s var(--ease);
}

.nav a:hover,
.nav a[aria-current="true"] {
  color: var(--ink);
}

.nav a[aria-current="true"]::after {
  content: "";
  position: absolute;
  left: 0.7rem;
  right: 0.7rem;
  bottom: 0.15rem;
  height: 2px;
  background: var(--ink);
}

.bar-end {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.bar-cta {
  display: none;
}

.bar .lang button {
  min-width: 2.25rem;
  padding: 0 0.5rem;
}

.lang {
  display: inline-flex;
  padding: 3px;
  border-radius: 999px;
  background: var(--surface);
}

.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: 600 var(--fs-small)/1 var(--sans);
  min-width: 2.5rem;
  min-height: 2rem;
  padding: 0 0.6rem;
  border-radius: 999px;
  cursor: pointer;
}

.lang button:hover {
  color: var(--ink);
}

/* Selected states invert: ink pill, graphite text, so the choice reads at a glance. */
.lang button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--bg);
}

.menu-btn,
.drawer-close,
.room-close {
  appearance: none;
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 0;
  border-radius: var(--r);
  background: var(--border);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 0.18s var(--ease);
}

.menu-btn:hover,
.drawer-close:hover,
.room-close:hover {
  background: var(--line);
}

.menu-btn svg,
.drawer-close svg,
.room-close svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
}

/* Drawer */

.drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(22rem, 88vw);
  max-width: none;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: var(--surface);
  color: var(--ink);
}

.drawer[open] {
  display: flex;
  flex-direction: column;
}

.drawer::backdrop {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--bar-h);
  padding-inline: 1.25rem;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  padding: 0.5rem 1.25rem;
}

.drawer-nav a {
  display: flex;
  align-items: center;
  min-height: 3.25rem;
  font-size: var(--fs-lead);
  font-weight: 500;
  text-decoration: none;
}

.drawer-nav a[aria-current="true"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.drawer-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem 1.25rem calc(1.25rem + env(safe-area-inset-bottom));
}

.drawer-label {
  font: 500 var(--fs-small)/1.3 var(--sans);
  color: var(--muted);
}

.lang-lg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 0.5rem;
}

.lang-lg button {
  min-height: 2.75rem;
}

@media (prefers-reduced-motion: no-preference) {
  .drawer[open] {
    animation: drawer-in 0.32s var(--ease);
  }

  .drawer[open]::backdrop {
    animation: fade-in 0.32s var(--ease);
  }
}

@keyframes drawer-in {
  from {
    transform: translateX(100%);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

/* Hero */

.hero {
  padding-block: clamp(1.75rem, 3.5vw, 2.75rem) clamp(3rem, 7vw, 6rem);
}

.hero-mark {
  position: relative;
  /* Room under the mark for Where is OTTO? */
  margin-bottom: 3.25rem;
}

/* The opening. main.js turns it on only when motion is allowed and plays it from the first scroll, with
   the page held still: the octopus dives, the mark rises out of the water and the copy follows. The water
   is the screen below --surface: what passes it fades out by --deep. main.js reads both. */
.hero.is-seq {
  --surface: 70%;
  --deep: 80%;
  padding-top: 0;
}

.hero.is-seq .hero-stage {
  position: relative;
  padding-top: clamp(1.75rem, 3.5vw, 2.75rem);
}

/* The octopus lives only in the opening. The sea is the screen under the bar; its lower part is water,
   so whatever sinks there fades out. The splash is drawn over it, unfaded. Neither takes the pointer
   from the wordmark beneath. */
.hero-sea,
.hero-splash {
  display: none;
}

.hero.is-seq .hero-sea {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  display: block;
  width: 100%;
  height: calc(100svh - var(--bar-h));
  overflow: hidden;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 var(--surface), transparent var(--deep));
  mask-image: linear-gradient(to bottom, #000 var(--surface), transparent var(--deep));
}

.hero.is-seq .hero-splash {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 3;
  display: block;
  width: 100%;
  height: calc(100svh - var(--bar-h));
  pointer-events: none;
}

.hero-octo {
  position: absolute;
  display: block;
  fill: var(--amber);
  transform-origin: 50% 40%;
  will-change: transform;
}

/* The TT face is cut out of the logo; graphite behind it keeps the face dark over the wordmark. */
.hero-octo-face {
  fill: var(--bg);
}

.hero.is-seq .hero-mark,
.hero.is-seq .hero-octo,
.hero.is-seq h1,
.hero.is-seq .hero-copy,
.hero.is-seq .bezel {
  will-change: transform, opacity;
}

/* Three amber chevrons under the octopus, while it is waiting for the first scroll. */
.hero-cue {
  display: none;
}

.hero-cue[hidden] {
  display: none !important;
}

.hero.is-seq .hero-cue {
  position: absolute;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 8rem;
  margin-left: -4rem;
  padding: 0.5rem 0;
  border: 0;
  background: transparent;
  color: var(--amber);
  cursor: pointer;
}

.hero-cue svg {
  display: block;
  width: 6.4rem;
  height: 3.2rem;
  margin-top: -0.85rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 9px;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-cue svg:first-child {
  margin-top: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .hero.is-seq.is-idle .hero-octo {
    animation: hero-octo-bob 2.4s ease-in-out infinite;
  }

  .hero-cue svg {
    animation: hero-cue-bob 1.7s ease-in-out infinite;
  }

  .hero-cue svg:nth-child(2) {
    animation-delay: 0.14s;
  }

  .hero-cue svg:nth-child(3) {
    animation-delay: 0.28s;
  }
}

@keyframes hero-octo-bob {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(18px);
  }
}

@keyframes hero-cue-bob {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(1.25rem);
  }
}

/* Where is OTTO? sets the opening back to before the first scroll. */
.hero-where {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: var(--gutter);
}

.hero-grid {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.hero h1 {
  font-size: var(--fs-display);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

/* Spanish runs a quarter longer: a step down keeps the title to two lines on a phone. */
:root:lang(es) .hero h1 {
  font-size: clamp(1.375rem, 0.39rem + 4.43vw, 4.5rem);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  width: 100%;
}

.status {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font: 400 var(--fs-small)/1.45 var(--sans);
  color: var(--muted);
}

.bezel {
  min-width: 0;
  background: var(--surface);
  border-radius: var(--r);
  padding: 0.75rem;
}

/* The tabs centred over the screen, the expand button at the right end of their row. */
.bezel-head {
  display: grid;
  grid-template-columns: minmax(2.75rem, 1fr) minmax(0, auto) minmax(2.75rem, 1fr);
  align-items: start;
}

.bezel-head .chips {
  grid-column: 2;
}

.bezel-expand {
  appearance: none;
  grid-column: 3;
  justify-self: end;
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-top: 0.125rem;
  border: 0;
  border-radius: var(--r);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.bezel-expand:hover {
  background: var(--border);
  color: var(--ink);
}

.bezel-expand svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chips {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0.125rem 0.125rem 0.75rem;
}

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

.chip {
  appearance: none;
  flex: none;
  min-height: 2.5rem;
  padding: 0 1.1rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: 500 var(--fs-small)/1 var(--sans);
  cursor: pointer;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.chip-short {
  display: none;
}

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

.chip[aria-selected="true"],
.chip[aria-pressed="true"] {
  background: var(--ink);
  color: var(--bg);
}

.view img {
  width: 100%;
  aspect-ratio: 2880 / 1682;
  object-fit: cover;
  object-position: top left;
  border-radius: var(--r);
  background: var(--bg);
}

.frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r);
}

.guide {
  display: flex;
  align-items: flex-end;
  gap: 0.6rem;
  max-width: 28rem;
}

.guide-mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 3.25rem;
  height: 3.25rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--bg);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.4);
}

.guide-mark .logo {
  width: 2.15rem;
}

.guide-say {
  position: relative;
  margin: 0 0 0.35rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--r-bubble);
  border-bottom-left-radius: 4px;
  background: var(--amber);
  color: var(--on-amber);
  font: 500 var(--fs-small) / 1.35 var(--sans);
}

.guide-say::before {
  content: "";
  position: absolute;
  left: -0.28rem;
  bottom: 0.55rem;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--amber);
  transform: rotate(45deg);
}

/* The hero's guide: a larger mark, a narrower bubble, larger type. */
.hero-copy .guide-mark {
  width: 6.5rem;
  height: 6.5rem;
}

.hero-copy .guide-mark .logo {
  width: 4.3rem;
}

.hero-copy .guide-say {
  max-width: 21.25rem;
  padding: 0.75rem 1rem;
  font-size: 1.5rem;
  line-height: 1.25;
}

@media (prefers-reduced-motion: no-preference) {
  .guide:not(.is-in) {
    visibility: hidden;
  }

  .guide.is-in .guide-mark {
    animation: guide-mark 0.7s var(--ease) both;
  }

  .guide.is-in .guide-say {
    animation: guide-say 0.55s var(--ease) 0.16s both;
  }
}

@keyframes guide-mark {
  from { transform: translateX(-8rem); }
}

@keyframes guide-say {
  from {
    opacity: 0;
    transform: translateX(-1.25rem);
  }
}

@media (max-width: 39.99rem) {
  .guide-mark {
    width: 2.75rem;
    height: 2.75rem;
  }

  .guide-mark .logo {
    width: 1.8rem;
  }
}

.view figcaption,
.view-cap {
  margin-top: 0.75rem;
  font-size: var(--fs-small);
  line-height: 1.5;
  color: var(--muted);
  padding-inline: 0.25rem;
}

@media (prefers-reduced-motion: no-preference) {
  .view {
    animation: view-in 0.4s var(--ease);
  }
}

@keyframes view-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

.bezel-note {
  margin-top: 0.5rem;
  padding: 0 0.25rem;
  font: 400 var(--fs-small)/1.45 var(--sans);
  color: var(--muted);
}

/* Chat */

.chat {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding: 1rem;
  border-radius: var(--r);
  background: var(--bg);
}

.msg {
  max-width: 34rem;
  padding: 0.85rem 1rem;
  border-radius: var(--r-bubble);
  background: var(--surface);
  font-size: var(--fs-small);
  line-height: 1.5;
}

.msg-who {
  display: block;
  margin-bottom: 0.3rem;
  font: 600 var(--fs-small)/1.2 var(--sans);
  color: var(--muted);
}

.msg-user {
  align-self: flex-end;
  background: var(--teal-tint);
  border-bottom-right-radius: var(--r);
}

.msg-user .msg-who {
  color: var(--teal);
}

.msg-otto {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.msg-otto .logo {
  width: 2.5rem;
  margin-top: 0.15rem;
}

.msg-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.msg-ai {
  border-top-left-radius: var(--r);
}

.msg-ai .msg-who {
  color: var(--amber);
}

.ask {
  padding: 0.8rem 1rem;
  border-radius: var(--r);
  background: var(--surface);
  font: 400 var(--fs-small)/1 var(--sans);
  color: var(--muted);
}

.ask span:first-child {
  color: var(--amber);
}

@media (prefers-reduced-motion: no-preference) {
  .chat.is-replay .msg-user,
  .chat.is-replay .msg-otto {
    animation: msg-in 0.5s var(--ease) both;
  }

  .chat.is-replay .msg-otto { animation-delay: 0.45s; }
}

@keyframes msg-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

/* Sections */

.band {
  padding-block: clamp(2.75rem, 8vw, 7.5rem);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-width: 52rem;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.band h2 {
  font-size: var(--fs-h2);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.band h3 {
  font-size: var(--fs-lead);
  line-height: 1.3;
  letter-spacing: -0.012em;
}

/* Ledger */

.ledger {
  background: var(--surface);
  border-radius: var(--r);
  padding-block: 0.5rem;
}

.ledger-row {
  display: grid;
  gap: 0.75rem;
  padding: 1.5rem 1.25rem;
}

.ledger-headrow {
  display: none;
}

.ledger-mode {
  font: 500 var(--fs-body)/1.4 var(--sans);
  color: var(--muted);
}

@media (max-width: 63.99rem) {
  .ledger-mode {
    position: absolute;
    width: 1px;
    height: 1px; /* taste-skill-ignore: visually hidden text, not a rule */
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }
}

.ledger-field {
  display: grid;
  gap: 0.5rem;
}

.ledger-field p {
  max-width: 58ch;
}

.ledger-cost {
  display: grid;
  gap: 0.3rem;
  color: var(--ink);
  line-height: 1.5;
}

.m-label {
  font: 500 var(--fs-small)/1.3 var(--sans);
  color: var(--muted);
}

/* Flow: knowledge in, reviewed course out */

.flow {
  --from: inset(0 0 100% 0);
  position: relative;
  display: flex;
  flex-direction: column;
  max-width: 28rem;
  margin: 0 auto;
}

.fl-node {
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 0.35rem;
  padding: 1.5rem 1.25rem;
  text-align: center;
  background: var(--surface);
  border-radius: var(--r);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease), background-color 0.4s var(--ease), outline-color 0.3s var(--ease);
}

.fl-title {
  font-weight: 600;
  font-size: var(--fs-lead);
  line-height: 1.3;
  letter-spacing: -0.012em;
}

.fl-sub {
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.45;
}

.fl-icon {
  width: 4.25rem;
  height: 4.25rem;
  margin-bottom: 0.5rem;
  overflow: visible;
}

.fl-icon-lg {
  width: 5.25rem;
  height: 5.25rem;
}

.fl-doc,
.fl-doc-back {
  fill: var(--surface);
  stroke-width: 1.8;
}

.fl-doc {
  stroke: var(--ink);
}

.fl-doc-back {
  stroke: var(--muted);
}

.fl-doc-lines {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.8;
  stroke-linecap: round;
}

.fl-harness {
  background: var(--amber-tint);
}

.fl-ring {
  fill: none;
  stroke: var(--amber);
  stroke-width: 1.4;
  stroke-dasharray: 4 5;
  transform-box: view-box;
  transform-origin: 32px 32px;
}

.fl-bot {
  fill: none;
  stroke: var(--amber);
  stroke-width: 2.6;
  stroke-linecap: round;
}

.fl-bot-fill {
  fill: var(--amber);
}

.fl-expert {
  grid-template-columns: auto minmax(0, 1fr);
  justify-items: start;
  align-items: center;
  column-gap: 1rem;
  row-gap: 1rem;
  text-align: left;
  background: var(--teal-tint);
}

.fl-avatar {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  background: var(--bg);
}

.fl-avatar svg {
  width: 2.25rem;
  height: 2.25rem;
  fill: none;
  stroke: var(--teal);
  stroke-width: 2.6;
  stroke-linecap: round;
}

.fl-expert-text {
  display: grid;
  gap: 0.2rem;
}

.fl-otto {
  padding: 1rem 1rem 1.5rem;
}

.fl-screen {
  width: 100%;
  height: auto;
  margin-bottom: 0.75rem;
}

.fl-s-frame {
  fill: var(--bg);
  stroke: var(--border);
}

.fl-s-rule {
  stroke: var(--border);
}

.fl-s-dot {
  fill: var(--subtle);
}

.fl-s-badge {
  fill: var(--amber);
}

.fl-s-badge-text {
  fill: var(--on-amber);
  font: 700 10px var(--sans);
  letter-spacing: 0.4px;
}

.fl-s-floor {
  fill: var(--surface);
  stroke: var(--line);
  stroke-width: 1.2;
}

.fl-s-solid {
  fill: var(--surface);
  stroke: var(--ink);
  stroke-width: 1.6;
  stroke-linejoin: round;
}

.fl-s-led-teal {
  fill: var(--teal);
}

.fl-s-led-amber {
  fill: var(--amber);
}

.fl-s-wire {
  fill: none;
  stroke: var(--muted);
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.fl-s-node {
  fill: var(--amber);
  transition: fill 0.5s var(--ease);
}

.fl-s-halo {
  fill: none;
  stroke: var(--amber);
  stroke-width: 1.5;
  opacity: 0.4;
  transform-box: fill-box;
  transform-origin: center;
}

.fl-s-card {
  fill: var(--surface);
  stroke: var(--border);
}

.fl-s-card-lines {
  stroke: var(--muted);
  stroke-width: 2;
  stroke-linecap: round;
}

/* Arrows: a dashed line, a head, and the packet that rides it */

.fl-arrow {
  --c: var(--amber);
  position: relative;
  display: flex;
  justify-content: center;
  height: 4.5rem;
}

.fl-label {
  position: absolute;
  top: 50%;
  left: calc(50% + 1.1rem);
  transform: translateY(-50%);
  width: max-content;
  max-width: 9rem;
  font: 600 var(--fs-small)/1.3 var(--sans);
  color: var(--c);
  transition: opacity 0.5s var(--ease);
}

.fl-line {
  position: relative;
  display: block;
  width: 10px;
  height: 100%;
  overflow: hidden;
  clip-path: inset(0 0 0 0);
  transition: clip-path 0.9s cubic-bezier(0.4, 0, 0.2, 1);
}

.fl-line::before,
.fl-line::after {
  content: "";
  position: absolute;
}

.fl-line::before {
  left: 4px;
  top: 0;
  bottom: 8px;
  width: 2px;
  background: var(--c);
  -webkit-mask: var(--dash-y) 0 0 / 100% 11px repeat-y;
  mask: var(--dash-y) 0 0 / 100% 11px repeat-y;
}

.fl-line::after {
  left: 0;
  bottom: 0;
  width: 10px;
  height: 10px;
  background: var(--c);
  clip-path: polygon(0 0, 100% 0, 50% 100%);
}

.fl-packet {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.fl-packet::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c);
  outline: 3px solid var(--bg);
}

.fl-loop {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
}

.fl-loop .fl-arrow {
  --c: var(--teal);
  width: 10px;
  height: 4.75rem;
}

.fl-down .fl-label {
  left: auto;
  right: calc(100% + 0.85rem);
  text-align: right;
}

.fl-up .fl-label {
  left: calc(100% + 0.85rem);
}

.fl-loop .fl-line {
  --from: inset(0 0 100% 0);
}

.fl-up .fl-line {
  --from: inset(100% 0 0 0);
}

.fl-up .fl-line::before {
  top: 8px;
  bottom: 0;
}

.fl-up .fl-line::after {
  top: 0;
  bottom: auto;
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

.fl-controls {
  display: grid;
}

.fl-controls > * {
  grid-area: 1 / 1;
  justify-self: end;
}

.fl-ctl {
  appearance: none;
  display: inline-flex;
  flex: none;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0 0.85rem;
  border: 0;
  border-radius: var(--r);
  background: var(--surface);
  color: var(--ink);
  font: 500 var(--fs-small)/1 var(--sans);
  cursor: pointer;
  transition: background-color 0.18s var(--ease), opacity 0.4s var(--ease);
}

.fl-ctl:hover {
  background: var(--border);
}

.fl-ctl svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* The prompt: from OTTO back to the expert */

.flow {
  padding-right: 2.5rem;
}

.fl-prompt {
  display: none;
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.flow.has-prompt .fl-prompt {
  display: block;
}

.fl-prompt-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.fl-prompt-line {
  fill: none;
  stroke: var(--teal);
  stroke-width: 2;
  stroke-dasharray: 6 5;
  stroke-linejoin: round;
}

.fl-prompt-mask {
  fill: none;
  stroke: #fff;
  stroke-width: 8;
  stroke-dasharray: calc(var(--len, 1000) * 1px);
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.fl-prompt-head {
  fill: var(--teal);
  transition: opacity 0.3s var(--ease) 0.85s;
}

.fl-prompt-label {
  position: absolute;
  transform: translateX(-50%);
  font: 600 var(--fs-small)/1.3 var(--sans);
  text-align: center;
  color: var(--teal);
  transition: opacity 0.5s var(--ease) 0.5s;
}

.fl-prompt-label.is-vertical {
  transform: translateY(-50%) rotate(180deg);
  writing-mode: vertical-rl;
  white-space: nowrap;
}

.flow.is-pending .fl-prompt:not(.is-in) .fl-prompt-mask {
  stroke-dashoffset: calc(var(--len, 1000) * 1px);
  transition: none;
}

.flow.is-pending .fl-prompt:not(.is-in) .fl-prompt-head,
.flow.is-pending .fl-prompt:not(.is-in) .fl-prompt-label {
  opacity: 0;
  transition: none;
}

/* The build: only when script runs and motion is allowed */

.flow.is-pending .fl-node:not(.is-in) {
  opacity: 0;
  transform: translateY(14px);
}

.flow.is-pending .fl-arrow:not(.is-in) .fl-line {
  clip-path: var(--from);
}

.flow.is-pending .fl-arrow:not(.is-in) .fl-label {
  opacity: 0;
}

.flow.is-pending .fl-say:not(.is-in) {
  visibility: hidden;
  transition: visibility 0s 0.6s;
}

.flow.is-pending .fl-say:not(.is-in) .fl-bubble {
  opacity: 0;
  transform: translateY(8px);
}

.flow.is-pending .fl-say.is-in .fl-bubble + .fl-bubble {
  transition-delay: 0s, 0s, 0s, 0.18s, 0.18s;
}

.flow.is-pending .fl-otto:not(.is-in) .fl-s-node {
  fill: var(--line);
}

/* Expert's call */

.flow[data-flow="feedback"] .fl-harness,
.flow[data-flow="feedback"] .fl-otto {
  background: var(--teal-tint);
}

.fl-note,
.fl-ok {
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}

.flow[data-flow="feedback"] .fl-note,
.flow[data-flow="approve"] .fl-ok {
  opacity: 1;
}

/* The path not in play goes quiet */

.flow[data-flow="feedback"] .fl-a-course,
.flow[data-flow="approve"] .fl-loop .fl-arrow {
  --c: var(--line);
}

.flow[data-flow="feedback"] .fl-a-course .fl-label,
.flow[data-flow="approve"] .fl-loop .fl-label {
  color: var(--subtle);
}

.flow[data-flow="approve"] .fl-otto {
  background: var(--amber-tint);
}

.flow[data-flow="approve"] .fl-otto .fl-title {
  color: var(--amber);
}

.flow[data-flow="approve"] .fl-main .fl-line::before {
  top: 3.5px;
  height: 3px;
}

.fl-ok-line,
.fl-ok-wire,
.fl-ok-text {
  fill: none;
  stroke: var(--amber);
  stroke-linecap: round;
  stroke-linejoin: round;
}

.fl-ok-line {
  stroke-width: 1.8;
}

.fl-ok-wire {
  stroke-width: 2.6;
}

.fl-ok-text {
  stroke-width: 2;
}

.fl-ok-track {
  fill: var(--surface);
}

.fl-ok-bar {
  fill: var(--amber);
  transform-box: fill-box;
  transform-origin: left center;
}

.fl-ok-card {
  fill: var(--amber-tint);
  stroke: var(--amber);
}

.fl-ok-pin {
  fill: var(--amber);
}

.fl-ok-card,
.fl-ok-pin {
  transform-box: fill-box;
  transform-origin: center;
}

.fl-ok-check {
  fill: none;
  stroke: var(--on-amber);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.fl-n-ring {
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.6;
  stroke-dasharray: 4 4;
  transform-box: fill-box;
  transform-origin: center;
}

.fl-n-lead {
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.4;
  stroke-linecap: round;
}

.fl-n-card {
  fill: var(--teal-tint);
  stroke: var(--teal);
}

.fl-n-text {
  fill: var(--ink);
  font: 500 11px var(--sans);
}

.fl-n-pin {
  fill: var(--teal);
}

.fl-n-pencil {
  fill: none;
  stroke: var(--bg);
  stroke-width: 1.3;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.fl-n-strike,
.fl-n-edit {
  fill: none;
  stroke: var(--teal);
  stroke-linecap: round;
}

.fl-n-strike {
  stroke-width: 1.8;
}

.fl-n-edit {
  stroke-width: 2;
}

.gate-status {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-inline: 0.25rem;
}

.gs-line {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
}

.gs-line::before {
  content: "";
  flex: none;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.15rem;
  border-radius: 50%;
}

.gs-notes {
  color: var(--teal);
}

.gs-notes::before {
  background: var(--teal) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%230b0c0f' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5.6 14.4l1-3.8 6.4-6.4 2.8 2.8-6.4 6.4zM11.6 5.6l2.8 2.8'/%3E%3C/svg%3E") center / 0.8rem no-repeat;
}

.gs-ok {
  color: var(--amber);
}

.gs-ok::before {
  background: var(--amber) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%230b0c0f' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5.5 10.4l3 3 6-6.4'/%3E%3C/svg%3E") center / 0.85rem no-repeat;
}

@media (prefers-reduced-motion: no-preference) {
  .gs-line:not([hidden]) {
    animation: msg-in 0.45s var(--ease) both;
  }
}

.flow.is-pending:not(.is-built) .gate-status {
  opacity: 0;
}

/* How it works: four stages, each a clause beside the screen it describes. They stack on phones and
   under reduced motion; from 64rem main.js holds the section under the bar and slides them across. */

.how {
  padding-block: 0;
}

.how-stage {
  display: grid;
}

.how-say {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  padding: clamp(2.5rem, 6vw, 4.5rem) var(--gutter) clamp(2rem, 5vw, 3.5rem);
}

.how .how-clause {
  max-width: 11em;
  font-size: var(--fs-h2);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.how-say p {
  max-width: 34em;
  font-size: var(--fs-lead);
  line-height: 1.5;
}

.how-show {
  display: grid;
  place-items: center;
  padding: clamp(1.5rem, 5vw, 4rem) var(--gutter);
  background: var(--surface);
}

.how-show img,
.how-show picture {
  display: block;
  width: 100%;
  max-width: 46rem;
  height: auto;
  border-radius: var(--r);
  background: var(--bg);
}

/* Stage one's mock of the sources the visitor brings: a recessed list, one row picked. */
.sources {
  width: min(100%, 30rem);
  border-radius: var(--r);
  background: var(--bg);
  font-size: var(--fs-small);
  line-height: 1.4;
  overflow: hidden;
}

.sources-head,
.sources-foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
}

.sources-head span,
.sources-foot {
  color: var(--muted);
}

.sources-list li {
  padding: 0.75rem 1rem;
}

.sources-list li:nth-child(odd) {
  background: color-mix(in srgb, var(--surface) 55%, var(--bg));
}

.sources-list .is-selected,
.sources-list .is-selected:nth-child(odd) {
  background: var(--amber-tint);
  color: var(--amber);
  font-weight: 500;
}

.sources-ready {
  color: var(--amber);
  font-weight: 500;
}

.how-rail {
  display: grid;
  gap: 0.75rem;
  padding-block: 1rem 1.5rem;
}

.how-line {
  display: block;
  height: 4px;
  border-radius: 2px;
  background: var(--surface);
  overflow: hidden;
}

.how-fill {
  display: block;
  height: 100%;
  background: var(--amber);
  transform-origin: 0 50%;
  transform: scaleX(0);
}

.how-names {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.how-names button {
  min-height: 2.75rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font: 600 clamp(1.125rem, 0.78rem + 0.85vw, 1.5rem)/1.2 var(--display);
  letter-spacing: -0.02em;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s var(--ease);
}

.how-names button:hover,
.how-names button[aria-current] {
  color: var(--ink);
}

.how-names .is-human button[aria-current] {
  color: var(--teal);
}

@media (min-width: 64rem) {
  .how-stage {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .how-say {
    justify-content: center;
    padding-left: max(var(--gutter), (100vw - var(--page)) / 2);
  }

  /* Sideways: one run of scroll per step, the pin holding the stages under the bar. */
  .how.is-sideways {
    --how-step: 80svh;
    height: calc(100svh - var(--bar-h) + 3 * var(--how-step));
  }

  .how.is-sideways .how-pin {
    position: sticky;
    top: var(--bar-h);
    display: grid;
    grid-template-rows: minmax(0, 1fr) auto;
    height: calc(100svh - var(--bar-h));
    overflow: hidden;
  }

  .how.is-sideways .how-track {
    display: flex;
    width: 400%;
    min-height: 0;
    will-change: transform;
  }

  .how.is-sideways .how-stage {
    flex: 0 0 25%;
    min-height: 0;
  }

  .how.is-sideways .how-show {
    min-height: 0;
  }

  .how.is-sideways .how-show img,
  .how.is-sideways .how-show picture {
    max-height: calc(100svh - var(--bar-h) - 12rem);
    width: auto;
    max-width: 100%;
    object-fit: contain;
  }
}

/* The flow dialog: the diagram whole, a chip per stage to light its parts, Replay to build it again. */

.flowmodal {
  position: fixed;
  inset: 0;
  width: min(80rem, calc(100vw - 2 * var(--gutter)));
  max-width: none;
  max-height: calc(100dvh - 2 * var(--gutter));
  margin: auto;
  padding: 0 clamp(1rem, 3vw, 2rem) clamp(1rem, 3vw, 2rem);
  border: 0;
  border-radius: var(--r);
  background: var(--bg);
  color: var(--ink);
  overflow: auto;
  overscroll-behavior: contain;
}

/* The diagram's nodes are surface panels, so the dialog stays on the ground and the page behind steps
   almost all the way out. */
.flowmodal::backdrop {
  background: color-mix(in srgb, var(--bg) 94%, transparent);
}

.flowmodal-top {
  position: sticky;
  top: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 1rem;
  min-height: var(--bar-h);
  background: var(--bg);
}

.flowmodal-top h2:focus {
  outline: none;
}

.flowmodal-top h2 {
  font-size: var(--fs-lead);
  line-height: 1.3;
  letter-spacing: -0.012em;
}

.flowmodal-chips {
  margin-bottom: clamp(1rem, 3vw, 2rem);
}

/* The viewer: the flow dialog's frame around one product screen, whole and as large as fits, with its
   caption. */
.viewer-figure {
  display: grid;
  gap: 0.75rem;
}

.viewer-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: calc(100dvh - 2 * var(--gutter) - var(--bar-h) - 5rem);
  object-fit: contain;
  border-radius: var(--r);
  background: var(--surface);
}

.viewer-cap {
  font: 400 var(--fs-small)/1.45 var(--sans);
  color: var(--muted);
}

/* Lit: the stage in play is ringed and its connector goes solid. The rest stays at full strength. */
.flow.is-built[data-focus="know"] [data-at="1"],
.flow.is-built[data-focus="harness"] [data-at="3"],
.flow.is-built[data-focus="course"] [data-at="8"] {
  outline: 2px solid var(--amber);
  outline-offset: 4px;
}

.flow.is-built[data-focus="expert"] [data-at="5"] {
  outline: 2px solid var(--teal);
  outline-offset: 4px;
}

.flow.is-built[data-focus="know"] [data-at="2"] .fl-line::before,
.flow.is-built[data-focus="harness"] [data-at="4"] .fl-line::before,
.flow.is-built[data-focus="expert"] [data-at="6"] .fl-line::before,
.flow.is-built[data-focus="course"] [data-at="7"] .fl-line::before {
  left: 3.5px;
  width: 3px;
  -webkit-mask: none;
  mask: none;
}

@media (min-width: 64rem) {
  .flow.is-built[data-focus="know"] [data-at="2"] .fl-line::before,
  .flow.is-built[data-focus="course"] [data-at="7"] .fl-line::before {
    left: 0;
    right: 8px;
    top: 3.5px;
    bottom: auto;
    width: auto;
    height: 3px;
    -webkit-mask: none;
    mask: none;
  }
}

.flow.is-built[data-focus="know"] [data-at="2"] .fl-label,
.flow.is-built[data-focus="course"] [data-at="7"] .fl-label {
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  background: var(--amber-tint);
}

.flow.is-built[data-focus="harness"] [data-at="4"] .fl-label,
.flow.is-built[data-focus="expert"] [data-at="6"] .fl-label {
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  background: var(--teal-tint);
}

.flow.is-built[data-focus="expert"] .fl-prompt-line {
  stroke-width: 3.25;
}

/* The expert's call: two bubbles spoken from the expert node */

.fl-say {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.6rem;
  margin-top: 0.85rem;
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease), visibility 0s;
}

.fl-bubble {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 3rem;
  padding: 0.7rem 1.1rem;
  border: 0;
  border-radius: var(--r-bubble);
  border-top-left-radius: var(--r);
  font: 500 var(--fs-body)/1.35 var(--sans);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), transform 0.5s var(--ease), opacity 0.5s var(--ease);
}

.fl-bubble svg {
  flex: none;
  width: 1.1rem;
  height: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.fl-bubble-notes {
  background: color-mix(in srgb, var(--teal) 18%, var(--bg));
}

.fl-bubble-notes svg {
  color: var(--teal);
}

.fl-bubble-notes:hover {
  background: color-mix(in srgb, var(--teal) 30%, var(--bg));
}

.fl-bubble-notes[aria-pressed="true"] {
  background: var(--teal);
  color: var(--bg);
}

.fl-bubble-notes[aria-pressed="true"] svg {
  color: var(--bg);
}

.fl-bubble-ok {
  background: color-mix(in srgb, var(--amber) 16%, var(--bg));
}

.fl-bubble-ok svg {
  color: var(--amber);
}

.fl-bubble-ok:hover {
  background: color-mix(in srgb, var(--amber) 26%, var(--bg));
}

.fl-bubble:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.fl-bubble-ok:disabled:hover {
  background: color-mix(in srgb, var(--amber) 16%, var(--bg));
}

.fl-bubble-ok[aria-pressed="true"] {
  background: var(--amber);
  color: var(--on-amber);
}

.fl-bubble-ok[aria-pressed="true"] svg {
  color: var(--on-amber);
}

@keyframes fl-run {
  0% { opacity: 0; transform: translateY(0); }
  12% { opacity: 1; }
  85% { opacity: 1; }
  100% { opacity: 0; transform: translateY(calc(100% - 10px)); }
}

@keyframes fl-run-up {
  0% { opacity: 0; transform: translateY(calc(100% - 10px)); }
  12% { opacity: 1; }
  85% { opacity: 1; }
  100% { opacity: 0; transform: translateY(0); }
}

@keyframes fl-run-main {
  0% { opacity: 0; transform: translateY(0); }
  12% { opacity: 1; }
  85% { opacity: 1; }
  100% { opacity: 0; transform: translateY(calc(100% - 10px)); }
}

@keyframes fl-dash-main {
  to { -webkit-mask-position: 0 11px; mask-position: 0 11px; }
}

@keyframes fl-dash {
  to { -webkit-mask-position: 0 11px; mask-position: 0 11px; }
}

@keyframes fl-dash-up {
  to { -webkit-mask-position: 0 -11px; mask-position: 0 -11px; }
}

@keyframes fl-spin {
  to { transform: rotate(360deg); }
}

@keyframes fl-n-ring {
  from { opacity: 0; transform: scale(0.8); }
}

@keyframes fl-n-draw {
  from { stroke-dashoffset: 90; }
  to { stroke-dashoffset: 0; }
}

@keyframes fl-ok-draw {
  from { stroke-dashoffset: 400; }
  to { stroke-dashoffset: 0; }
}

@keyframes fl-ok-fill {
  from { transform: scaleX(0); }
}

@keyframes fl-halo {
  0% { transform: scale(0.6); opacity: 0.6; }
  100% { transform: scale(1.6); opacity: 0; }
}

@media (prefers-reduced-motion: no-preference) {
  .flow.is-pending:not(.is-built) .fl-arrow.is-in .fl-packet {
    animation: fl-run 0.95s cubic-bezier(0.4, 0, 0.2, 1) both;
  }

  .flow.is-pending:not(.is-built) .fl-main.is-in .fl-packet {
    animation-name: fl-run-main;
  }

  .flow.is-pending:not(.is-built) .fl-up.is-in .fl-packet {
    animation-name: fl-run-up;
  }

  .flow.is-live .fl-main .fl-line::before {
    animation: fl-dash-main 1s linear infinite;
  }

  .flow.is-live .fl-harness.is-in .fl-ring {
    animation: fl-spin 28s linear infinite;
  }

  .flow.is-live[data-flow="feedback"] .fl-loop .fl-line::before {
    animation: fl-dash 1s linear infinite;
  }

  .flow.is-live[data-flow="feedback"] .fl-up .fl-line::before {
    animation-name: fl-dash-up;
  }

  .flow.is-live[data-flow="feedback"] .fl-down .fl-packet {
    animation: fl-run 1.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  }

  .flow.is-live[data-flow="feedback"] .fl-up .fl-packet {
    animation: fl-run-up 1.6s cubic-bezier(0.4, 0, 0.2, 1) 0.8s infinite;
  }

  .flow.is-live[data-flow="approve"] .fl-a-course .fl-packet {
    animation: fl-run-main 1.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  }

  .flow[data-flow="feedback"] .fl-n-ring {
    animation: fl-n-ring 0.6s var(--ease) both;
  }

  .flow[data-flow="feedback"] .fl-n-strike,
  .flow[data-flow="feedback"] .fl-n-edit {
    stroke-dasharray: 90;
    animation: fl-n-draw 0.5s var(--ease) 0.35s both;
  }

  .flow[data-flow="approve"] .fl-ok-line,
  .flow[data-flow="approve"] .fl-ok-wire,
  .flow[data-flow="approve"] .fl-ok-text {
    stroke-dasharray: 400;
    animation: fl-ok-draw 0.9s var(--ease) both;
  }

  .flow[data-flow="approve"] .fl-ok-bar {
    animation: fl-ok-fill 1.4s var(--ease) 0.3s both;
  }

  .flow[data-flow="approve"] .fl-ok-card,
  .flow[data-flow="approve"] .fl-ok-pin {
    animation: fl-n-ring 0.5s var(--ease) 0.5s both;
  }

  .flow.is-live[data-flow="approve"] .fl-a-know .fl-packet {
    animation: fl-run-main 1.6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
  }

  .flow.is-live[data-flow="approve"] .fl-s-halo {
    animation: fl-halo 1.6s var(--ease) infinite;
  }
}

@media (prefers-reduced-motion: reduce) {
  .fl-node,
  .fl-line,
  .fl-label,
  .fl-prompt-mask,
  .fl-prompt-head,
  .fl-prompt-label {
    transition: none;
  }
}

/* The way into the Try a room dialog, at the end of Learn the plant */

.try-entry {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem 1.25rem;
  margin-top: clamp(3rem, 6vw, 4.5rem);
  padding: clamp(1.25rem, 3vw, 2rem);
  background: var(--surface);
  border-radius: var(--r);
}

.try-entry .logo {
  width: 3rem;
}

.try-entry-text {
  display: grid;
  gap: 0.4rem;
}

.try-entry-text p {
  max-width: 60ch;
}

.try-entry .btn {
  grid-column: 1 / -1;
  justify-self: start;
}

.try-q {
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.try-q > p {
  max-width: 58ch;
}

.try-opts {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.4rem;
}

.try-opt {
  appearance: none;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  min-height: 3.5rem;
  padding: 0.7rem 1rem 0.7rem 0.75rem;
  border: 0;
  border-radius: var(--r);
  background: var(--bg);
  color: var(--ink);
  font: 500 var(--fs-body)/1.4 var(--sans);
  text-align: left;
  cursor: pointer;
  transition: background-color 0.18s var(--ease);
}

.try-opt:hover {
  background: var(--border);
}

.try-key {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--surface);
  font: 600 var(--fs-small)/1 var(--sans);
  color: var(--muted);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

/* The learner's pick is their own words, so it takes the human teal. */
.try-opt[aria-pressed="true"] {
  background: var(--teal-tint);
}

.try-opt[aria-pressed="true"] .try-key {
  background: var(--teal);
  color: var(--bg);
}

/* Learn the plant by working it: one practice screen, notes in both margins that light what they
   describe. Phone-first: the notes sit two-up under the screen. */

.plant-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.75rem 1rem;
}

.plant-title {
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
  text-align: center;
}

.plant-panel,
.plant .try-entry {
  grid-column: 1 / -1;
}

.plant-notes {
  display: grid;
  gap: 1.5rem;
  align-content: start;
}

.plant-notes li {
  display: grid;
  gap: 0.3rem;
  border-radius: var(--r);
  outline-offset: 6px;
  cursor: default;
}

.plant-notes strong {
  font-weight: 600;
  line-height: 1.3;
  transition: color 0.18s var(--ease);
}

.plant-notes span {
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.5;
}

.plant-notes li.is-on strong {
  color: var(--amber);
}

/* The practice screen as OTTO shows it: a surface panel, its parts recessed to graphite. */
.tutor {
  display: grid;
  gap: 0.9rem;
  padding: 1rem;
  border-radius: var(--r);
  background: var(--surface);
  font-size: var(--fs-small);
  line-height: 1.45;
}

.tutor-path {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.tutor-path span {
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: var(--bg);
  color: var(--muted);
  font-size: 0.8125rem;
}

.tutor-path .is-on {
  background: var(--amber-tint);
  color: var(--amber);
}

.tutor-label {
  color: var(--amber);
  font-size: 0.8125rem;
  font-weight: 600;
}

.tutor-prompt {
  margin-top: -0.4rem;
  font-size: 0.9375rem;
}

.tutor-options {
  display: grid;
  gap: 0.5rem;
}

.tutor-options li {
  display: block;
}

.tutor-opt {
  display: grid;
  gap: 0.2rem;
  width: 100%;
  padding: 0.7rem 0.8rem;
  border: 0;
  border-radius: var(--r);
  background: var(--bg);
  color: inherit;
  font: inherit;
  line-height: inherit;
  text-align: start;
  cursor: pointer;
}

.tutor-opt:hover {
  background: color-mix(in srgb, var(--ink) 8%, var(--bg));
}

.tutor-options strong {
  font-weight: 600;
}

.tutor-options span {
  color: var(--muted);
}

.tutor-opt.is-picked,
.tutor-opt.is-picked:hover {
  background: var(--amber-tint);
}

.tutor-opt.is-picked strong {
  color: var(--amber);
}

.tutor-reply {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.6rem;
  align-items: start;
  padding: 0.75rem;
  border-radius: 14px 14px 14px 4px;
  background: var(--amber-tint);
  color: var(--ink);
}

.tutor-reply [hidden] {
  display: none;
}

.tutor-reply-copy {
  display: grid;
  gap: 0.35rem;
}

.tutor-verdict {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--amber);
  font-weight: 600;
}

.tutor-mark {
  width: 1rem;
  height: 1rem;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.tutor-reply .logo {
  width: 2rem;
}

.tutor-next {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
}

.tutor-continue {
  padding: 0.4rem 0.9rem;
  border-radius: var(--r);
  background: var(--amber);
  color: var(--on-amber);
  font-weight: 600;
}

/* A note points at its part with the focus ring's amber. */
.tutor [data-part] {
  border-radius: var(--r);
  outline: 2px solid transparent;
  outline-offset: 4px;
  transition: outline-color 0.18s var(--ease);
}

.tutor [data-part].is-lit {
  outline-color: var(--amber);
}

@media (min-width: 40rem) {
  .plant-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: 1.5rem;
  }

  .plant-panel {
    grid-column: 1 / span 7;
    grid-row: 1 / span 2;
  }

  .plant-notes-left {
    grid-column: 8 / -1;
    grid-row: 1;
  }

  .plant-notes-right {
    grid-column: 8 / -1;
    grid-row: 2;
  }
}

@media (min-width: 64rem) {
  .plant-panel {
    grid-column: 5 / span 4;
    grid-row: 1 / span 2;
  }

  .plant-notes li {
    max-width: 24ch;
  }

  .plant-notes-left {
    grid-column: 1 / span 4;
    grid-row: 1 / span 2;
    text-align: right;
  }

  .plant-notes-left li {
    margin-left: auto;
  }

  .plant-notes-right {
    grid-column: 9 / span 4;
    grid-row: 1 / span 2;
  }

  /* With the script, each note sits level with the part it describes. */
  .plant-grid.js-notes .plant-notes {
    display: block;
    position: relative;
  }

  .plant-grid.js-notes .plant-notes-left {
    grid-row: 1 / span 2;
  }

  .plant-grid.js-notes .plant-notes li {
    position: absolute;
    left: 0;
    right: 0;
  }

  .plant-grid.js-notes .plant-notes-left li {
    left: auto;
  }
}

/* Who it's for: the title sits whole on the graphite half, above what you bring. "You get" lines up
   with that, on a white wash at the bottom of the photograph. OTTO's line sits mid-image.
   Phone-first: the halves stack, the light one under the dark. */

.who {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.who-dark,
.who-light {
  display: none;
}

.who-title {
  grid-row: 1;
  padding: clamp(2.75rem, 8vw, 4rem) var(--gutter) 1.5rem;
  font-size: var(--fs-display);
  font-weight: 650;
  line-height: 0.98;
  letter-spacing: -0.04em;
}

:root:lang(es) .who-title {
  font-size: clamp(1.375rem, 0.39rem + 4.43vw, 4.5rem);
}

.who-tabs {
  grid-row: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0 var(--gutter) 1.5rem;
}

.who-tabs[hidden] {
  display: none;
}

.who-tab {
  min-height: 2.75rem;
  padding: 0 1.1rem;
  border: 0;
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font: 500 var(--fs-small)/1 var(--sans);
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.who-tab[aria-selected="true"] {
  background: var(--ink);
  color: var(--bg);
}

.who-panels {
  grid-row: 3;
}

.who-name {
  padding: 1.5rem var(--gutter) 0;
  font-size: var(--fs-lead);
}

/* Once the tabs run, the tab names the panel. */
.who-tabs:not([hidden]) ~ .who-panels .who-name {
  display: none;
}

.who-bring,
.who-get {
  display: grid;
  align-content: start;
  gap: 0.6rem;
  padding: 1.5rem var(--gutter) 2.5rem;
  font-size: var(--fs-lead);
  line-height: 1.4;
}

.who-bring p,
.who-get p {
  max-width: 24em;
}

.who-kind {
  color: var(--muted);
}

.who-get {
  background-color: var(--ink);
  background-position: center;
  background-size: cover;
  color: var(--bg);
}

/* On a phone the white block is the “you get” panel, so the photo lives there, washed white. */
#who-oem .who-get {
  background-image:
    linear-gradient(rgb(237 239 242 / 0.72), rgb(237 239 242 / 0.72)),
    url("assets/delivery/equipment-manufacturers.jpg");
}

#who-si .who-get {
  background-image:
    linear-gradient(rgb(237 239 242 / 0.72), rgb(237 239 242 / 0.72)),
    url("assets/delivery/system-integrators.jpg");
}

#who-op .who-get {
  background-image:
    linear-gradient(rgb(237 239 242 / 0.72), rgb(237 239 242 / 0.72)),
    url("assets/delivery/plant-vessel-teams.jpg");
}

.who-get .who-kind {
  color: var(--light-muted);
}

.who-get-copy {
  display: grid;
  gap: 0.6rem;
}

.who-say {
  display: flex;
  align-items: flex-end;
  gap: 0.6rem;
  max-width: 22.4rem;
  margin-top: 1rem;
}

.who-fit {
  position: relative;
  margin: 0 0 0.35rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--r-bubble);
  border-bottom-left-radius: 4px;
  background: var(--amber);
  color: var(--on-amber);
  font: 500 var(--fs-small) / 1.35 var(--sans);
  max-width: none;
}

.who-fit::before {
  content: "";
  position: absolute;
  left: -0.28rem;
  bottom: 0.55rem;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--amber);
  transform: rotate(45deg);
}

@media (min-width: 40rem) {
  .who {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: auto auto auto;
    overflow: clip;
  }

  .who-dark,
  .who-light {
    display: block;
    grid-row: 1 / -1;
  }

  .who-dark {
    grid-column: 1;
  }

  .who-light {
    position: relative;
    grid-column: 2;
    background-color: var(--ink);
    background-position: center 30%;
    background-size: cover;
  }

  /* The selected audience’s photograph fills the white half. A white wash keeps the type readable. */
  .who:has(.who-tabs:not([hidden])):has(#tab-oem[aria-selected="true"]) .who-light {
    background-image: url("assets/delivery/equipment-manufacturers.jpg");
  }

  .who:has(.who-tabs:not([hidden])):has(#tab-si[aria-selected="true"]) .who-light {
    background-image: url("assets/delivery/system-integrators.jpg");
  }

  .who:has(.who-tabs:not([hidden])):has(#tab-op[aria-selected="true"]) .who-light {
    background-image: url("assets/delivery/plant-vessel-teams.jpg");
  }

  .who:has(.who-tabs:not([hidden])) .who-light::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(to bottom, transparent 0 46%, rgb(237 239 242 / 0.4) 56%, rgb(237 239 242 / 0.9) 64%, #edeff2 72%);
    pointer-events: none;
  }

  /* The panels dissolve into the section grid, so "You get" shares a row with "You bring"
     and the OTTO line can sit in the middle of the photograph. */
  .who-tabs:not([hidden]) ~ .who-panels,
  .who-tabs:not([hidden]) ~ .who-panels .who-panel:not([hidden]),
  .who-tabs:not([hidden]) ~ .who-panels .who-get {
    display: contents;
  }

  .who-tabs {
    position: relative;
    grid-column: 1;
    grid-row: 2;
    padding: 1.25rem var(--gutter) 0;
    padding-left: max(var(--gutter), (100vw - var(--page)) / 2);
  }

  .who-panels {
    grid-column: 1 / -1;
    grid-row: 3;
  }

  .who-panel {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .who-panel[hidden] {
    display: none;
  }

  .who-name {
    grid-column: 1 / -1;
    padding-left: max(var(--gutter), (100vw - var(--page)) / 2);
  }

  .who-bring,
  .who-get {
    padding-block: clamp(2rem, 1rem + 5vh, 5rem) clamp(2rem, 1rem + 3vw, 4rem);
  }

  .who-bring {
    grid-column: 1;
    grid-row: 3;
    position: relative;
    z-index: 1;
    padding-left: max(var(--gutter), (100vw - var(--page)) / 2);
  }

  .who-tabs:not([hidden]) ~ .who-panels .who-get-copy {
    display: grid;
    align-content: start;
    gap: 0.6rem;
    grid-column: 2;
    grid-row: 3;
    position: relative;
    z-index: 1;
    align-self: start;
    padding-block: clamp(2rem, 1rem + 5vh, 5rem) clamp(2rem, 1rem + 3vw, 4rem);
    padding-left: clamp(1.5rem, 1rem + 3vw, 4rem);
    padding-right: var(--gutter);
  }

  .who-tabs:not([hidden]) ~ .who-panels .who-say {
    grid-column: 2;
    grid-row: 1 / -1;
    align-self: center;
    justify-self: end;
    z-index: 2;
    width: max-content;
    max-width: min(22.4rem, 80%);
    margin: 0 var(--gutter) 0 1.5rem;
  }

  .who-tabs:not([hidden]) ~ .who-panels .who-fit {
    min-width: 0;
  }

  .who-title {
    position: relative;
    z-index: 1;
    grid-column: 1;
    grid-row: 1;
    padding: clamp(2.75rem, 5vw, 4.25rem) var(--gutter) clamp(1.25rem, 0.5rem + 1.5vw, 2rem);
    padding-left: max(var(--gutter), (100vw - var(--page)) / 2);
  }

  .who-title span {
    display: block;
    padding: 0;
    background: none;
    color: inherit;
  }
}

@media (min-width: 40rem) and (prefers-reduced-motion: no-preference) {
  .who-tabs:not([hidden]) ~ .who-panels .who-say {
    animation: who-say-in 0.75s var(--ease) both;
  }
}

@keyframes who-say-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
}

/* Data */

.data-grid {
  display: grid;
}

.owner {
  margin-top: 0.75rem;
  color: var(--ink);
  font-weight: 600;
  max-width: 40ch;
}

.terms {
  display: grid;
  gap: 2rem;
}

.terms > div {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
  column-gap: 0.85rem;
  row-gap: 0.35rem;
}

.terms > div::before {
  content: "";
  grid-row: 1 / span 2;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.15rem;
  background: var(--amber);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='10' cy='10' r='8.2'/%3E%3Cpath d='M6.4 10.3l2.4 2.4 4.8-5'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='10' cy='10' r='8.2'/%3E%3Cpath d='M6.4 10.3l2.4 2.4 4.8-5'/%3E%3C/svg%3E") center / contain no-repeat;
}

.terms > div.is-human::before {
  background: var(--teal);
}

.terms dt {
  font-weight: 600;
  font-size: var(--fs-lead);
  line-height: 1.35;
}

.terms dd {
  max-width: 58ch;
}

/* Pilot: the page's one amber field, the primary action at full size. The steps read in
   graphite on amber; the intake is a graphite card with its fields on surface. */

.pilot {
  background: var(--amber);
  color: var(--on-amber);
}

.pilot-in {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.pilot-say {
  display: grid;
  align-content: start;
  gap: 1.75rem;
}

.pilot .pilot-title {
  max-width: 9em;
  font-size: var(--fs-display);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

:root:lang(es) .pilot .pilot-title {
  font-size: clamp(1.375rem, 0.39rem + 4.43vw, 4.5rem);
}

.pilot-lede {
  max-width: 34em;
  font-size: var(--fs-lead);
  line-height: 1.45;
}

.pilot-weeks {
  display: grid;
  gap: 1.35rem;
  counter-reset: pilot;
}

.pilot-weeks li {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  gap: 0.15rem 0.75rem;
  max-width: 44em;
  counter-increment: pilot;
}

.pilot-weeks li::before {
  content: counter(pilot);
  grid-row: 1;
  align-self: center;
  display: grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--r);
  background: var(--on-amber);
  color: var(--amber);
  font: 600 0.8125rem/1 var(--sans);
}

.pilot-weeks strong {
  align-self: center;
  font-size: var(--fs-lead);
  font-weight: 600;
  line-height: 1.3;
}

.pilot-weeks li > span {
  grid-column: 2;
}

.intake {
  display: grid;
  align-content: start;
  gap: 1rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border-radius: var(--r);
  background: var(--bg);
  color: var(--ink);
}

.intake-title {
  font-size: var(--fs-lead);
  font-weight: 600;
}

.intake-field {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: var(--fs-small);
}

.intake-field input {
  min-height: 3rem;
  padding: 0 0.9rem;
  border: 0;
  border-radius: var(--r);
  background: var(--surface);
  color: var(--ink);
  font: 400 1rem/1.4 var(--sans);
  caret-color: var(--amber);
}

.intake-field input::placeholder {
  color: var(--subtle);
}

.intake-field input:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.intake-choice {
  position: relative;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.intake-choice legend {
  position: absolute;
  width: 1px;
  height: 1px; /* taste-skill-ignore: visually hidden text, not a rule */
  margin: 0;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.intake-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  padding: 4px;
  border-radius: var(--r);
  background: var(--surface);
}

.intake-options label {
  position: relative;
  display: grid;
}

.intake-options input {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.intake-options span {
  display: grid;
  place-items: center;
  min-height: 2.5rem;
  padding: 0.45rem 0.6rem;
  border-radius: var(--r);
  color: var(--muted);
  font-size: var(--fs-small);
  font-weight: 500;
  line-height: 1.25;
  text-align: center;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.intake-options input:checked + span {
  background: var(--border);
  color: var(--ink);
}

.intake-options input:focus-visible + span {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
}

.intake-send {
  width: 100%;
}

.intake-note {
  color: var(--muted);
  font-size: var(--fs-small);
}

.intake-note a {
  color: var(--ink);
}

@media (min-width: 64rem) {
  .pilot-in {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* Footer: tiles on the graphite ground, apart by space alone: who makes OTTO, the sections, the
   address, the lockup large on its own tile, and Scope a pilot in amber. */

.foot {
  padding: clamp(2rem, 5vw, 3.5rem) var(--gutter) 2rem;
}

.foot-tiles,
.foot-screens {
  max-width: var(--page);
  margin-inline: auto;
}

.foot-tiles {
  display: grid;
  gap: 0.5rem;
}

.foot-tile {
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border-radius: var(--r);
  background: var(--surface);
}

.foot-about,
.foot-mail {
  display: grid;
  align-content: space-between;
  gap: 1.5rem;
}

.foot-statement {
  font-size: var(--fs-lead);
}

.foot-tile a {
  color: var(--ink);
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  font-size: var(--fs-small);
}

.foot-legal a[aria-current="page"],
.foot-nav a[aria-current="page"] {
  color: var(--muted);
  text-decoration: none;
}

.foot-copy,
.foot-mail p,
.foot-screens {
  color: var(--muted);
  font-size: var(--fs-small);
}

.foot-nav ul {
  display: grid;
  gap: 0.35rem;
}

.foot-nav a {
  text-decoration: none;
}

.foot-nav a:hover {
  text-decoration: underline;
}

.foot-mail a {
  font-size: var(--fs-lead);
}

.foot-name {
  display: grid;
  place-items: center;
  min-height: 11rem;
}

.foot-name .lockup {
  width: min(100%, 34rem);
  height: auto;
}

.foot-tile.foot-go {
  display: grid;
  align-content: space-between;
  gap: 2rem;
  min-height: 11rem;
  background: var(--amber);
  color: var(--on-amber);
  font-family: var(--display);
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -0.03em;
  text-decoration: none;
  transition: background-color 0.18s var(--ease);
}

.foot-go svg {
  justify-self: end;
  width: 2.5rem;
  height: 2.5rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 4;
  transition: transform 0.18s var(--ease);
}

.foot-tile.foot-go:hover {
  background: var(--amber-hover);
}

.foot-go:hover svg {
  transform: translate(3px, -3px);
}

.foot-screens {
  margin-top: 1.25rem;
}

@media (min-width: 40rem) {
  .foot-tiles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .foot-name {
    grid-column: 1 / -1;
  }
}

@media (min-width: 64rem) {
  .foot-tiles {
    grid-template-columns: 5fr 3fr 4fr;
  }

  .foot-name {
    grid-column: 1 / span 2;
    min-height: 16rem;
  }

  .foot-tile.foot-go {
    min-height: 16rem;
  }
}

@media (max-width: 39.99rem) {
  .view img {
    aspect-ratio: 4 / 3;
  }

  .cta-row .btn {
    width: 100%;
  }

  .chip {
    padding: 0 0.9rem;
  }

  .chip-long {
    display: none;
  }

  .fl-ctl {
    padding: 0;
  }

  .fl-ctl span {
    position: absolute;
    width: 1px;
    height: 1px; /* taste-skill-ignore: visually hidden text, not a rule */
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .chip-short {
    display: inline;
  }
}

/* Tablet */

@media (min-width: 40rem) {
  .bar-cta {
    display: inline-flex;
  }

  /* The masthead and the title are two things: the rig's readouts never sit just over the headline. */
  .hero-mark {
    margin-bottom: 5.5rem;
  }

  .status {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
  }

  /* The product page's footer also lists the sections, so it stays one column until desktop. */

}

/* Desktop */

@media (min-width: 64rem) {
  /* The ledger becomes a table only where its middle column can hold a heading in two lines. */
  .ledger-headrow {
    display: grid;
    padding-block: 1.25rem 0;
    font: 500 var(--fs-small)/1.3 var(--sans);
    color: var(--muted);
  }

  .ledger-row {
    grid-template-columns: 10rem minmax(0, 1fr) 13rem;
    gap: 2rem;
    padding-inline: 1.75rem;
  }

  .ledger-mode {
    padding-top: 0.25rem;
  }

  .ledger-cost .m-label {
    display: none;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: 2rem clamp(2.5rem, 4vw, 4rem);
  }

  .hero h1 {
    grid-column: 1 / -1;
  }

  .hero-copy {
    align-self: stretch;
  }

  .hero-copy .guide {
    margin-top: auto;
  }

  .status {
    flex-direction: column;
  }

  .bezel {
    padding: 1rem;
  }

  /* Only the chosen view is on the page; two caption lines keep the frame's height across chips. */
  .view figcaption,
  .view-cap {
    min-height: 3em;
  }

  .view-otto .chat {
    min-height: 0;
    aspect-ratio: 2880 / 1682;
    justify-content: center;
    gap: 0.7rem;
    padding: 1.25rem 1.75rem;
  }

  .view-otto .msg {
    padding: 0.7rem 0.95rem;
  }

  .view-otto .ask {
    padding: 0.65rem 0.95rem;
  }

  .flow {
    --from: inset(0 100% 0 0);
    display: grid;
    max-width: none;
    padding-right: 0;
    padding-bottom: 3rem;
    grid-template-columns: minmax(0, 0.9fr) 7.5rem minmax(0, 1fr) 7.5rem minmax(0, 1.35fr);
    align-items: center;
    padding-top: 3rem;
  }

  .fl-know {
    grid-area: 1 / 1;
    min-height: 14rem;
  }

  .fl-a-know {
    grid-area: 1 / 2;
  }

  .fl-harness {
    grid-area: 1 / 3;
    min-height: 14rem;
  }

  .fl-a-course {
    grid-area: 1 / 4;
  }

  .fl-otto {
    grid-area: 1 / 5;
    margin-block: -3.5rem;
  }

  .fl-loop {
    grid-area: 2 / 3;
  }

  .fl-loop .fl-arrow {
    height: 5.25rem;
  }

  .fl-expert {
    grid-area: 3 / 3;
  }

  .fl-say {
    grid-area: 3 / 1 / 4 / 3;
    justify-self: end;
    align-self: center;
    align-items: flex-end;
    margin: 0 1.25rem 0 0;
  }

  .fl-bubble {
    border-top-left-radius: var(--r);
    border-bottom-right-radius: 6px;
  }

  .flow.is-pending .fl-say:not(.is-in) .fl-bubble {
    transform: translateX(10px);
  }

  .flow .gate-status {
    grid-area: 2 / 5 / 4 / 6;
    align-self: start;
    margin-top: 4.75rem;
    padding-left: 3.25rem;
  }

  .fl-main {
    height: 10px;
    margin-inline: 0.6rem;
  }

  .fl-main .fl-label {
    top: auto;
    bottom: calc(100% + 0.7rem);
    left: 50%;
    max-width: none;
    white-space: nowrap;
    transform: translateX(-50%);
  }

  .fl-main .fl-line {
    width: 100%;
    height: 10px;
  }

  .fl-main .fl-line::before {
    left: 0;
    right: 8px;
    top: 4px;
    bottom: auto;
    width: auto;
    height: 2px;
    -webkit-mask: var(--dash-x) 0 0 / 11px 100% repeat-x;
    mask: var(--dash-x) 0 0 / 11px 100% repeat-x;
  }

  .fl-main .fl-line::after {
    left: auto;
    right: 0;
    top: 0;
    bottom: auto;
    clip-path: polygon(0 0, 100% 50%, 0 100%);
  }

  @keyframes fl-run-main {
    0% { opacity: 0; transform: translateX(0); }
    12% { opacity: 1; }
    85% { opacity: 1; }
    100% { opacity: 0; transform: translateX(calc(100% - 10px)); }
  }

  @keyframes fl-dash-main {
    to { -webkit-mask-position: 11px 0; mask-position: 11px 0; }
  }

  .data-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
    align-items: start;
  }

  .data-grid .section-head {
    margin-bottom: 0;
    position: sticky;
    top: calc(var(--bar-h) + 2rem);
  }
}

@media (min-width: 64rem) and (max-width: 79.99rem) {
  .flow {
    grid-template-columns: minmax(0, 0.9fr) 6.75rem minmax(0, 1fr) 6.75rem minmax(0, 1.3fr);
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

}

/* The section links join the bar only where they fit beside both room and pilot buttons, in both languages. */

@media (min-width: 80rem) {
  .nav {
    display: flex;
    margin-right: auto;
  }

  .menu-btn {
    display: none;
  }

  .brand {
    margin-right: 1rem;
  }

  .nav a,
  .bar .btn {
    white-space: nowrap;
  }
}

/* Try a room: a lesson-shaped modal over the dimmed page */

html:has(.tryroom[open]) {
  overflow: hidden;
}

.tryroom {
  --room-pad: clamp(1rem, 3vw, 2rem);
  position: fixed;
  inset: 0;
  width: min(68rem, calc(100vw - 2 * var(--gutter)));
  max-width: none;
  height: min(50rem, calc(100dvh - 2 * var(--gutter)));
  max-height: none;
  margin: auto;
  padding: 0;
  border: 0;
  border-radius: var(--r);
  background: var(--surface);
  color: var(--ink);
  overflow: hidden;
}

.tryroom[open] {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
}

.tryroom::backdrop {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
}

.room-top,
.room-foot {
  padding-inline: var(--room-pad);
}

.room-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 1rem;
  height: var(--bar-h);
}

.room-progress {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.375rem;
  width: 100%;
  max-width: 28rem;
}

.room-progress li {
  position: relative;
  height: 4px;
  background: var(--border);
  overflow: hidden;
}

.room-progress li::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease);
}

.room-progress li.is-on::after {
  transform: none;
}

.room-count {
  min-width: 2.75rem;
  text-align: right;
  font: 500 var(--fs-small)/1 var(--sans);
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.room-count-now {
  color: var(--amber);
}

.room-body {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-block: clamp(1.25rem, 3vw, 2rem);
}

.room-grid,
.room-done {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--room-pad);
}

.room-grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

.room-main {
  min-width: 0;
}

.room-step {
  display: grid;
  gap: 1.25rem;
}

.room-head {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.room-head h2,
.room-done h2 {
  font-size: clamp(1.5rem, 1.15rem + 1.1vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.018em;
}

.tryroom h2:focus {
  outline: none;
}

/* The product screen, cropped under its own course bar, with points to open */

.room-step > * {
  min-width: 0;
}

.room-pan {
  padding: 0.75rem;
  border-radius: var(--r);
  background: var(--bg);
  overflow-x: auto;
  scrollbar-width: thin;
}

.room-shot {
  --ratio: 1.907;
  --top: -11.323%;
  position: relative;
  aspect-ratio: var(--ratio);
  overflow: hidden;
  border-radius: var(--r);
  background: var(--bg);
}

.room-shot img {
  position: absolute;
  left: 0;
  top: var(--top);
  width: 100%;
  max-width: none;
}

.room-pan-hint {
  display: none;
}

.spot-route {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.spot-route polyline {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.spot-route .route-case {
  stroke: var(--bg);
  stroke-width: 5;
}

.spot-route .route-line {
  stroke: var(--amber);
  stroke-width: 2.5;
  stroke-dasharray: 6 5;
}

.spot {
  position: absolute;
  left: var(--x);
  top: var(--y);
  z-index: 1;
  width: 2.75rem;
  height: 2.75rem;
  margin: -1.375rem 0 0 -1.375rem;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.spot::before,
.spot::after {
  content: "";
  position: absolute;
  inset: 0.6rem;
  border-radius: 50%;
  border: 2px solid var(--amber);
}

.spot::before {
  background: color-mix(in srgb, var(--bg) 60%, transparent);
  transition: background-color 0.25s var(--ease);
}

.spot::after {
  opacity: 0;
}

.spot:hover::before {
  background: var(--amber-tint);
}

.spot:focus-visible {
  border-radius: 50%;
  outline-offset: -2px;
}

.spot.is-done::before {
  background: var(--amber);
}

.spot.is-done::after {
  inset: 0.95rem;
  opacity: 1;
  border: 0;
  border-radius: 0;
  background: var(--on-amber);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.4l3.2 3.1L13 4.6'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.4l3.2 3.1L13 4.6'/%3E%3C/svg%3E") center / contain no-repeat;
}

/* OTTO beside the work */

.room-guide {
  display: grid;
  gap: 1rem;
  align-content: start;
  min-width: 0;
}

.room-guide > * {
  min-width: 0;
}

.room-guide .msg {
  max-width: none;
}

/* The demo course's own screen for this step sits on OTTO's side, after the reply, as reference rather than exercise. */
.room-proof {
  margin-top: 0.5rem;
}

.room-guide .room-said {
  justify-self: end;
  max-width: 85%;
}

/* Five slots on the route, in order by position: a dashed ring until its place is found, then filled. */
.room-route {
  display: grid;
  gap: 0.6rem;
}

.room-route li {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  column-gap: 0.75rem;
  row-gap: 0.1rem;
  font-size: var(--fs-small);
  line-height: 1.45;
}

.room-route li::before {
  content: "";
  grid-row: 1 / span 2;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  border: 2px dashed var(--line);
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.room-route li.is-on::before {
  border: 2px solid var(--amber);
  background: var(--amber);
}

/* A slot stays empty until its place is pointed at, so the list never gives the order away. */
.room-route li:not(.is-on) > span {
  visibility: hidden;
}

.room-route-name {
  font-weight: 600;
}

.room-route li > span:last-child {
  color: var(--muted);
}

/* What the checkpoint listens for: open rings, never ticks, because nothing here grades the answer. */
.room-listen {
  display: grid;
  gap: 0.75rem;
}

.room-listen li {
  display: grid;
  grid-template-columns: 1rem minmax(0, 1fr);
  align-items: start;
  gap: 0.75rem;
  font-size: var(--fs-small);
  line-height: 1.5;
}

.room-listen li::before {
  content: "";
  width: 0.75rem;
  height: 0.75rem;
  margin-top: 0.3rem;
  border-radius: 50%;
  border: 2px solid var(--line);
}

.room-explain {
  display: grid;
  gap: 0.5rem;
  font-size: var(--fs-small);
  font-weight: 500;
}

.room-explain textarea {
  width: 100%;
  min-height: 9rem;
  padding: 0.85rem 1rem;
  border: 0;
  border-radius: var(--r);
  background: var(--bg);
  color: var(--ink);
  font: 400 var(--fs-body)/1.5 var(--sans);
  caret-color: var(--amber);
  resize: vertical;
}

.room-explain textarea::placeholder {
  color: var(--subtle);
}

.room-explain textarea:focus-visible {
  outline-offset: 2px;
}

/* The bottom bar: back, where you stand, and the one filled action */

.room-foot {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-block: 0.85rem calc(0.85rem + env(safe-area-inset-bottom));
}

.room-status {
  margin-left: auto;
  font-size: var(--fs-small);
  font-weight: 500;
  line-height: 1.45;
  color: var(--muted);
  text-align: right;
}

/* Counts line up in tabular figures. */
.room-status.is-count {
  font-variant-numeric: tabular-nums;
}

.room-next {
  min-width: 10rem;
}

.tryroom.is-done .room-foot {
  display: none;
}

/* Done: the four stages, all passed */

.room-done {
  display: grid;
  justify-items: start;
  gap: 1.25rem;
  max-width: none;
  margin-inline: 0;
  padding-block: clamp(0.5rem, 5vh, 3rem);
}

.room-done-otto {
  width: 4rem;
}

.room-done > p {
  color: var(--muted);
  max-width: 52ch;
}

.room-path {
  position: relative;
  display: grid;
  gap: 0.85rem;
  isolation: isolate;
}

.room-path::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: calc(1rem - 1px);
  top: 1rem;
  bottom: 1rem;
  width: 2px;
  background: var(--amber);
  -webkit-mask: var(--dash-y) 0 0 / 100% 11px repeat-y;
  mask: var(--dash-y) 0 0 / 100% 11px repeat-y;
}

.room-path li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  min-height: 2rem;
  font-weight: 500;
}

.room-path li::before {
  content: "";
  flex: none;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 2px solid var(--amber);
  background: var(--amber-tint);
}

.room-path li::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 50%;
  width: 1rem;
  height: 1rem;
  margin-top: -0.5rem;
  background: var(--amber);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.4l3.2 3.1L13 4.6'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 8.4l3.2 3.1L13 4.6'/%3E%3C/svg%3E") center / contain no-repeat;
}

@media (prefers-reduced-motion: no-preference) {
  .tryroom[open] {
    animation: room-in 0.36s var(--ease);
  }

  .tryroom[open]::backdrop {
    animation: fade-in 0.36s var(--ease);
  }

  .spot:not(.is-done)::after {
    animation: spot-pulse 2.2s var(--ease) infinite;
  }
}

@keyframes room-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
}

@keyframes spot-pulse {
  0% {
    opacity: 0.8;
    transform: scale(1);
  }
  100% {
    opacity: 0;
    transform: scale(1.9);
  }
}

@media (max-width: 39.99rem) {
  .room-pan {
    padding: 0.5rem;
  }

  .room-shot {
    width: calc(14rem * var(--ratio));
  }

  .room-proof .room-shot {
    width: auto;
  }

  .room-pan-hint {
    display: inline;
  }

  .room-foot {
    flex-wrap: wrap;
    gap: 0.6rem 0.75rem;
  }

  .room-status {
    order: -1;
    flex-basis: 100%;
    margin: 0;
    text-align: left;
  }

  .room-next {
    flex: 1;
    min-width: 0;
  }
}

@media (min-width: 40rem) {
  .try-entry {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }

  .try-entry .btn {
    grid-column: auto;
  }
}

@media (min-width: 64rem) {
  .room-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  /* Pointing at the plant needs the screen large; the guide narrows while you look. */
  .room-grid[data-step="1"],
  .room-grid[data-step="2"] {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  /* OTTO lines up with the work, under the step title, and holds while a long step scrolls. */
  .room-guide {
    position: sticky;
    top: 0;
    padding-top: 3.75rem;
  }
}

/* Legal pages */

.bar .lang-doc {
  display: inline-flex;
}

.doc .bar-end {
  margin-left: auto;
}

.doc-main {
  padding-block: clamp(2rem, 6vw, 4.5rem) clamp(4rem, 8vw, 6rem);
}

.doc-body {
  max-width: 44rem;
}

.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  margin-bottom: 1.5rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9375rem;
}

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

.doc-back svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.doc-body h1 {
  font-size: clamp(1.875rem, 1.4rem + 1.6vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.022em;
}

.doc-meta {
  margin-top: 0.75rem;
  font: 400 var(--fs-small)/1.5 var(--sans);
  color: var(--muted);
}

.doc-body h2 {
  margin-top: 2.75rem;
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.doc-body p,
.doc-body li {
  color: var(--muted);
  max-width: 68ch;
}

.doc-body p + p {
  margin-top: 0.85rem;
}

.doc-body a {
  color: var(--ink);
}

.doc-body ul {
  display: grid;
  gap: 0.7rem;
}

.doc-body ul li {
  position: relative;
  padding-left: 1.25rem;
}

.doc-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
}

.doc-facts {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.doc-facts > div {
  display: grid;
  gap: 0.3rem;
}

.doc-facts dt {
  font-weight: 600;
  color: var(--ink);
}

.doc-facts dd {
  color: var(--ink);
}

@media (min-width: 40rem) {
  .doc-facts > div {
    grid-template-columns: 14rem minmax(0, 1fr);
    gap: 1.5rem;
    align-items: baseline;
  }
}

/* Why OTTO: a short history in four pictures, then where OTTO comes in. Each picture sits beside its
   text from 64rem, 7/5; the one portrait page is held to a readable size. */

.why-head {
  max-width: 52rem;
}

.why-head h1 {
  font-size: var(--fs-h2);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.why-head .lede {
  margin-top: 1.25rem;
}

.why-scenes {
  display: grid;
  gap: clamp(3.5rem, 8vw, 7.5rem);
  margin-top: clamp(3rem, 7vw, 6rem);
}

.why-scene {
  display: grid;
  gap: 1.5rem;
}

.why-scene img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r);
  background: var(--surface);
}

.why-scene figcaption {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.45;
}

.why-scene.is-tall figure {
  max-width: 26rem;
}

.why-text h2 {
  font-size: var(--fs-lead);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.why-text p {
  max-width: 60ch;
  margin-top: 0.75rem;
}

.why-text p + p {
  margin-top: 0.85rem;
}

.why-otto {
  display: grid;
  justify-items: start;
  gap: 1.25rem;
  margin-top: clamp(4rem, 9vw, 8rem);
  padding: clamp(1.5rem, 4vw, 3.5rem);
  border-radius: var(--r);
  background: var(--surface);
}

.why-otto h2 {
  font-size: var(--fs-h2);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.why-otto p {
  max-width: 60ch;
}

.why-otto .btn {
  margin-top: 0.75rem;
}

.why-sources {
  max-width: 52rem;
  margin-top: clamp(3rem, 6vw, 4.5rem);
  color: var(--muted);
  font-size: var(--fs-small);
  line-height: 1.45;
}

.why-sources h2 {
  margin-bottom: 0.5rem;
  color: var(--ink);
  font-size: var(--fs-small);
}

.why-sources ul {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.why-sources a {
  color: var(--ink);
}

@media (min-width: 64rem) {
  .why-scene {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
  }

  .why-scene.is-tall figure {
    justify-self: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn .i {
    transition: none;
  }

  .btn:hover .i {
    transform: none;
  }
}

@media (forced-colors: active) {
  .btn,
  .chip,
  .bezel,
  .bezel-expand,
  .fl-node,
  .fl-ctl,
  .ledger,
  .try-entry,
  .room-explain textarea,
  .room-pan,
  .tryroom,
  .drawer,
  .lang,
  .try-opt {
    border: 1px solid CanvasText;
  }

  .try-opt[aria-pressed="true"] {
    outline: 2px solid Highlight;
    outline-offset: 2px;
  }

  .spot.is-done::before,
  .room-progress li.is-on::after {
    background: Highlight;
  }
}