/* ==========================================================================
   WIZKET — bot.css  (About page · hero: "the Wizket bot")
   Layers, back → front: sky (petrol glow + floor, same as Vision/Mission)
   · stars · giant mode word · ridgelines · WebGL bot · copy / kit / dial.
   Desktop: headline top-left · "Build your bot" kit left · bot centre ·
            lead bottom-left · mode dial bottom-right.
   ≤760px:  centred headline + "Build your bot" button → bot → dial row;
            the kit opens as a bottom sheet.
   Orange: headline full stop, dial pointer dot, active-mode tick
   (+ antenna tips and heart eyes inside the canvas).
   ========================================================================== */

.bt {
  --bt-pad: clamp(20px, 3.4vw, 48px);
  --bt-horizon: 64%;
  /* landscape — same tones as the Horizon (Vision / Mission) scene */
  --bt-r1: #1c2b2e;
  --bt-r2: #142023;
  --bt-floor: #0f171a;
  --bt-floor2: var(--bg);           /* the floor ends on the page colour → seamless into Vision */
  --bt-edge: rgba(242, 241, 237, 0.11);
  --bt-star: #f2f1ed;
  --bt-star-a: 0.9;
  --bt-giant: color-mix(in srgb, var(--text) 8%, transparent);
  position: relative;
  overflow: hidden;
  height: max(100svh, 640px);
  background: var(--bg);
}
:root[data-theme="light"] .bt {
  --bt-r1: #c4ced1;
  --bt-r2: #d8e0e2;
  --bt-floor: #e9ecea;
  --bt-floor2: var(--bg);
  --bt-edge: rgba(23, 26, 28, 0.16);
  --bt-star: #171a1c;
  --bt-star-a: 0.45;
  --bt-giant: color-mix(in srgb, var(--text) 9%, transparent);
}

/* ---------- sky + floor ---------- */
.bt__sky {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom, transparent 0 var(--bt-horizon), var(--bt-floor) var(--bt-horizon), var(--bt-floor2) 100%),
    radial-gradient(70% 55% at 50% 62%, var(--petrol) 0%, transparent 70%),
    var(--bg);
}
.bt__stars {
  position: absolute;
  left: 0; right: 0; top: 0;
  height: var(--bt-horizon);
  color: var(--bt-star);
  opacity: var(--bt-star-a);
  -webkit-mask: linear-gradient(to bottom, #000 40%, transparent 92%);
  mask: linear-gradient(to bottom, #000 40%, transparent 92%);
}
.bt__stars svg { display: block; width: 100%; height: 100%; fill: currentColor; }

/* ---------- ridgelines (generated SVG) ---------- */
.bt__scape {
  position: absolute;
  left: 0; right: 0;
  top: calc(var(--bt-horizon) - 25%);
  height: 25%;
  z-index: 2;
  pointer-events: none;
}
.bt__scape svg { display: block; width: 100%; height: calc(100% + 1px); }
.bt-r1 { fill: var(--bt-r1); transition: fill 0.6s var(--ease-io); }
.bt-r2 { fill: var(--bt-r2); transition: fill 0.6s var(--ease-io); }
.bt-edge { fill: none; stroke: var(--bt-edge); stroke-width: 1; vector-effect: non-scaling-stroke; }
.bt-mist0 { stop-color: var(--bt-floor); stop-opacity: 0; }
.bt-mist1 { stop-color: var(--bt-floor); stop-opacity: 1; }

/* ---------- giant mode word (behind the ridges, like VISION / MISSION) ---------- */
.bt__giant {
  position: absolute;
  left: 0; right: 0;
  top: var(--bt-giant-top, 45%);   /* phones: set by bot.js to sit behind the bot */
  z-index: 1;
  margin: 0;
  display: grid;
  place-items: center;
  transform: translateY(-50%);
  pointer-events: none;
  user-select: none;
}
.bt__word {
  grid-area: 1 / 1;
  display: flex;
  overflow: hidden;
  padding: 0.04em 0 0.02em;
  font: 400 min(19vw, 33vh)/0.9 var(--font-display);
  letter-spacing: -0.005em;
  white-space: nowrap;
  color: var(--bt-giant);
}
.bt__ch { display: block; will-change: transform; }

/* ---------- WebGL stage ---------- */
.bt__stage {
  position: absolute;
  inset: 0;
  z-index: 3;
  touch-action: pan-y;           /* vertical swipes still scroll the page */
}
.bt__canvas {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}
.bt.is-gl .bt__canvas { opacity: 1; }

/* ---------- copy + controls ---------- */
.bt__ui {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  grid-template-rows: auto 1fr auto;
  padding: clamp(112px, 15vh, 150px) var(--bt-pad) clamp(26px, 5vh, 48px);
  pointer-events: none;
}
.bt__ui a, .bt__ui button, .bt__ui input, .bt__knob, .bt__lead, .bt-kit { pointer-events: auto; }

.bt__head { transition: opacity 0.45s var(--ease-out); }

.bt__eyebrow {
  margin: 0 0 clamp(16px, 2.4vh, 24px);
  display: flex;
  align-items: center;
  gap: 14px;
  font: 600 12px/1 var(--font-body);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text);
}
.bt__rule { width: 36px; height: 1px; background: var(--line2); }

.bt__title {
  margin: 0;
  font: 400 clamp(2.6rem, min(4.9vw, 9.5vh), 6.2rem)/0.92 var(--font-display);
  letter-spacing: 0.004em;
  text-transform: uppercase;
  color: var(--text);
}
.bt__line { display: block; overflow: hidden; padding-bottom: 0.05em; margin-bottom: -0.05em; }
.bt__line > span { display: block; will-change: transform; }
.bt__title .is-outline {
  color: transparent;
  -webkit-text-fill-color: transparent;
  -webkit-text-stroke: clamp(1px, 0.1vw, 1.6px) var(--text);
}
.bt__hl {                       /* BUSINESSES: the one solid orange word in the outlined line */
  font-style: normal;
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
  -webkit-text-stroke: 0;
}
.bt__dot {
  font-style: normal;
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
  -webkit-text-stroke: 0;
}
br.bt__br { display: none; }

/* bottom row */
.bt__dock {
  grid-row: 3;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding-right: calc(3.25rem + clamp(1rem, 2.2vw, 2rem));   /* clear the floating music button */
  transition: opacity 0.45s var(--ease-out);
}
.bt__lead {
  margin: 0;
  max-width: 32ch;
  font: 400 clamp(0.95rem, 1.08vw, 1.08rem)/1.55 var(--font-body);
  color: var(--muted);
}

/* "click the bot" hint, sits on the floor under the bot */
.bt__hint {
  position: absolute;
  left: 50%;
  top: calc(var(--bt-horizon) + 8%);
  z-index: 4;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateX(-50%);
  font: 500 11px/1 var(--font-body);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s var(--ease-out);
}
.bt__hint i {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  animation: bt-pulse 1.8s var(--ease-io) infinite;
}
.bt.is-landed .bt__hint { opacity: 1; }
.bt .bt__hint.is-gone, .bt.is-kit .bt__hint { opacity: 0; }
.bt__hint-touch { display: none; }
@media (hover: none) {
  .bt__hint-touch { display: inline; }
  .bt__hint-mouse { display: none; }
}
@keyframes bt-pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.35; transform: scale(0.7); } }

/* tap-to-walk ripple (phones) */
.bt__tap {
  position: absolute;
  z-index: 4;
  width: 46px; height: 46px;
  margin: -23px 0 0 -23px;
  border-radius: 50%;
  border: 1px solid var(--text);
  pointer-events: none;
  animation: bt-tap 0.65s var(--ease-out) forwards;
}
.bt__tap::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 5px; height: 5px;
  margin: -2.5px 0 0 -2.5px;
  border-radius: 50%;
  background: var(--accent);
}
@keyframes bt-tap { from { transform: scale(0.3); opacity: 0.9; } to { transform: scale(1.4); opacity: 0; } }

/* ==========================================================================
   "Build your bot" kit
   ========================================================================== */
.bt-kit__toggle {
  appearance: none;
  margin-top: clamp(20px, 3vh, 28px);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 18px 11px 15px;
  border: 1px solid var(--line2);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 55%, transparent);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font: 500 12px/1 var(--font-body);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.35s var(--ease-out), opacity 0.35s var(--ease-out), visibility 0.35s;
}
.bt-kit__toggle svg { transition: transform 0.5s var(--ease-out); }
.bt-kit__toggle:hover { border-color: var(--text); }
.bt-kit__toggle:hover svg { transform: rotate(180deg); }
.bt.is-kit .bt-kit__toggle { opacity: 0; visibility: hidden; pointer-events: none; -webkit-backdrop-filter: none; backdrop-filter: none; }

.bt-kit {                       /* desktop: right side, just above the dial (bot.js sets --bt-ctrl-h); clear of Wiz bottom-left */
  position: absolute;
  right: var(--bt-pad);
  bottom: calc(clamp(26px, 5vh, 48px) + var(--bt-ctrl-h, 250px) + 18px);
  width: 292px;
  margin: 0;
  padding: 18px 18px 16px;
  display: grid;
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  backdrop-filter: blur(16px) saturate(1.2);
  box-shadow: 0 30px 60px -36px rgba(0, 0, 0, 0.55);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease-out), transform 0.6s var(--ease-out), visibility 0.5s;
}
.bt.is-kit .bt-kit { opacity: 1; visibility: visible; transform: none; }
.bt__lead { transition: opacity 0.4s var(--ease-out), visibility 0.4s; }

.bt-kit__head { display: flex; align-items: center; justify-content: space-between; }
.bt-kit__title {
  margin: 0;
  font: 400 1.05rem/1 var(--font-display);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
}
.bt-kit__x {
  appearance: none;
  width: 30px; height: 30px;
  margin: -6px -6px -6px 0;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: none;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.3s, background-color 0.3s;
}
.bt-kit__x:hover { color: var(--text); background: var(--line); }

.bt-kit__row { display: grid; gap: 10px; margin: 0; }
.bt-kit__label {
  margin: 0;
  display: flex;
  justify-content: space-between;
  font: 600 10.5px/1 var(--font-body);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.bt-kit__label output { color: var(--text); font-variant-numeric: tabular-nums; letter-spacing: 0.06em; }

/* swatches */
.bt-kit__sws { display: flex; flex-wrap: wrap; gap: 10px; }
.bt-kit__sw {
  appearance: none;
  position: relative;
  width: 28px; height: 28px;
  padding: 0;
  border: 1px solid var(--line2);
  border-radius: 50%;
  background: var(--c);
  box-shadow: inset 0 -5px 8px rgba(0, 0, 0, 0.18), inset 0 2px 3px rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: transform 0.35s var(--ease-out);
}
.bt-kit__sw::after {             /* selection ring */
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1.5px solid var(--text);
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.3s, transform 0.4s var(--ease-out);
}
.bt-kit__sw:hover { transform: scale(1.12); }
.bt-kit__sw[aria-pressed="true"]::after { opacity: 1; transform: none; }
.bt-kit__sw:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
/* glow swatches look like a little visor */
[data-bt-sw="glow"] .bt-kit__sw {
  background: radial-gradient(circle at 50% 50%, #111 50%, var(--c) 70%, #111 92%);
  box-shadow: 0 0 10px -3px var(--c);
}

/* sliders */
.bt-kit__range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.bt-kit__range::-webkit-slider-runnable-track {
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(to right, var(--text) var(--p, 50%), var(--line2) var(--p, 50%));
}
.bt-kit__range::-moz-range-track { height: 2px; border-radius: 2px; background: var(--line2); }
.bt-kit__range::-moz-range-progress { height: 2px; border-radius: 2px; background: var(--text); }
.bt-kit__range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  margin-top: -8px;
  border-radius: 50%;
  border: 2px solid var(--text);
  background: var(--bg);
  transition: transform 0.25s var(--ease-out);
}
.bt-kit__range::-moz-range-thumb {
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--text);
  background: var(--bg);
}
.bt-kit__range:active::-webkit-slider-thumb { transform: scale(1.25); }
.bt-kit__range:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

.bt-kit__foot { display: flex; gap: 8px; padding-top: 2px; }
.bt-kit__btn {
  appearance: none;
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 38px;
  border: 1px solid var(--line2);
  border-radius: 999px;
  background: none;
  font: 500 12px/1 var(--font-body);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.3s, color 0.3s;
}
.bt-kit__btn:hover { border-color: var(--text); }
.bt-kit__btn svg { transition: transform 0.4s var(--ease-out); }
.bt-kit__btn:active svg { transform: rotate(90deg); }
.bt-kit__btn--ghost { flex: 0 0 auto; padding: 0 18px; border-color: transparent; color: var(--muted); }
.bt-kit__btn--ghost:hover { color: var(--text); border-color: var(--line2); }

/* ==========================================================================
   Mode dial
   ========================================================================== */
.bt__ctrl {
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto auto;
  column-gap: clamp(20px, 2.2vw, 32px);
  row-gap: 12px;
  align-items: center;
}
.bt__modes { grid-column: 1; grid-row: 2; }
.bt__knob { grid-column: 2; grid-row: 2; }

.bt__modes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  justify-items: end;
}
.bt__modes button {
  appearance: none;
  border: 0;
  background: none;
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font: 500 13px/1 var(--font-body);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.35s var(--ease-out);
}
.bt__modes button i { font-style: normal; font-size: 10.5px; letter-spacing: 0.08em; opacity: 0.7; }
.bt__modes button::after {
  content: "";
  width: 8px; height: 1px;
  background: var(--line2);
  transition: width 0.45s var(--ease-out), background-color 0.35s;
}
.bt__modes button:hover,
.bt__modes button.is-on { color: var(--text); }
.bt__modes button.is-on::after { width: 26px; background: var(--accent); }

.bt__knob {
  --k: clamp(104px, 9vw, 136px);
  position: relative;
  width: var(--k);
  height: var(--k);
  border-radius: 50%;
  touch-action: none;
  cursor: grab;
  outline: none;
  user-select: none;
  -webkit-user-select: none;
}
.bt__knob.is-drag { cursor: grabbing; }

.bt__ticks {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: repeating-conic-gradient(from -135deg, var(--line2) 0 1deg, transparent 1deg 7.5deg);
  -webkit-mask: radial-gradient(closest-side, transparent 84%, #000 85%, #000 96%, transparent 97%);
  mask: radial-gradient(closest-side, transparent 84%, #000 85%, #000 96%, transparent 97%);
}
.bt__det {
  position: absolute;
  left: 50%; top: 0;
  width: 1px;
  height: 50%;
  transform-origin: 50% 100%;
  transform: rotate(var(--d));
  pointer-events: none;
}
.bt__det::before {
  content: "";
  position: absolute;
  left: -0.5px; top: -6px;
  width: 2px; height: 11px;
  background: var(--text);
  opacity: 0.55;
}

.bt__knob-rot {
  position: absolute;
  inset: 17%;
  border-radius: 50%;
  transform: rotate(var(--a, -135deg));
  background:
    radial-gradient(circle at 50% 50%, transparent 0 40%, color-mix(in srgb, var(--text) 5%, transparent) 41% 42%, transparent 43%),
    repeating-conic-gradient(from 0deg, color-mix(in srgb, var(--text) 7%, transparent) 0 2deg, transparent 2deg 10deg),
    radial-gradient(circle at 35% 28%, color-mix(in srgb, var(--text) 9%, var(--card)), var(--card) 70%);
  border: 1px solid var(--line2);
  box-shadow:
    0 18px 30px -16px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 color-mix(in srgb, var(--text) 12%, transparent);
  transition: scale 0.4s var(--ease-out);
}
:root[data-theme="light"] .bt__knob-rot { box-shadow: 0 16px 28px -16px rgba(23, 26, 28, 0.35), inset 0 1px 0 #fff; }
.bt__knob:hover .bt__knob-rot { scale: 1.04; }
.bt__knob.is-drag .bt__knob-rot { scale: 0.97; }
.bt__knob:focus-visible .bt__knob-rot { outline: 2px solid var(--accent); outline-offset: 6px; }
.bt__pip {
  position: absolute;
  left: 50%;
  top: 9%;
  width: 2px;
  height: 22%;
  transform: translateX(-50%);
  border-radius: 2px;
  background: var(--text);
}
.bt__pip::before {
  content: "";
  position: absolute;
  left: 50%; top: -9px;
  width: 6px; height: 6px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: var(--accent);
}

.bt__cap {
  grid-column: 1 / -1;
  grid-row: 3;
  justify-self: end;
  max-width: 34ch;
  margin: 0;
  display: flex;
  justify-content: flex-end;
  align-items: baseline;
  gap: 10px;
  min-height: 1.5em;
  font: 400 13px/1.4 var(--font-body);
  color: var(--muted);
  text-align: right;
}
.bt__cap b { font: 400 13px/1 var(--font-display); letter-spacing: 0.06em; color: var(--text); }
.bt__name { display: none; }
.bt__turn {
  grid-column: 2;
  grid-row: 1;
  justify-self: center;
  margin: 0;
  font: 500 10px/1 var(--font-body);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
  pointer-events: none;
}

/* ---------- no WebGL: words + dial still work ---------- */
.bt--nogl .bt__canvas,
.bt--nogl .bt__hint,
.bt--nogl .bt-kit,
.bt--nogl .bt-kit__toggle { display: none; }

/* ---------- laptop ---------- */
@media (max-width: 1180px) {
  .bt__lead { max-width: 28ch; }
  .bt-kit { width: 268px; }
}

/* ---------- desktop: button + card both live on the right, just above the dial ----------
   It can never grow into the navbar (max-height; it scrolls inside on very short screens). */
@media (min-width: 761px) {
  .bt { --bt-kit-bottom: calc(clamp(26px, 5vh, 48px) + var(--bt-ctrl-h, 160px) + 18px); }
  .bt-kit__toggle {
    position: absolute;
    right: var(--bt-pad);
    bottom: var(--bt-kit-bottom);
    margin: 0;
  }
  .bt-kit {
    bottom: var(--bt-kit-bottom);
    max-height: calc(100svh - var(--bt-kit-bottom) - var(--nav-top) - var(--nav-h) - 14px);
    overflow-y: auto;
    scrollbar-width: none;
    transform-origin: 100% 100%;
  }
  .bt-kit::-webkit-scrollbar { display: none; }
}
/* wide screens: two columns (colours | sliders), short enough for any height, still clear of the bot in the middle */
@media (min-width: 1300px) {
  .bt-kit {
    width: min(520px, calc(50vw - 200px));
    grid-template-columns: 1fr 1fr;
    column-gap: 28px;
    row-gap: 14px;
    padding: 16px 20px;
  }
  .bt-kit__head, .bt-kit__foot { grid-column: 1 / -1; }
  .bt-kit > :nth-child(2) { grid-column: 1; grid-row: 2; }    /* body colours */
  .bt-kit > :nth-child(3) { grid-column: 1; grid-row: 3; }    /* visor glow */
  .bt-kit > :nth-child(4) { grid-column: 2; grid-row: 2; }    /* glow slider */
  .bt-kit > :nth-child(5) { grid-column: 2; grid-row: 3; }    /* size slider */
  .bt-kit__sws { flex-wrap: nowrap; }
  .bt-kit__foot { justify-content: flex-end; }
  .bt-kit__foot .bt-kit__btn { flex: 0 0 auto; padding: 0 20px; }
}

/* ==========================================================================
   Tablet & phone
   ========================================================================== */
@media (max-width: 760px) {
  .bt { --bt-horizon: 67%; }
  .bt__ui { padding: 94px var(--bt-pad) 24px; }

  /* centred headline */
  .bt__head { display: grid; justify-items: center; text-align: center; }
  .bt__eyebrow { margin-bottom: 14px; font-size: 11px; letter-spacing: 0.22em; }
  .bt__eyebrow::after { content: ""; width: 36px; height: 1px; background: var(--line2); }
  .bt__title { font-size: clamp(2.7rem, 13.6vw, 4.6rem); line-height: 0.9; }
  br.bt__br { display: inline; }
  .bt-kit__toggle { margin-top: 18px; padding: 10px 16px 10px 13px; font-size: 11px; }

  .bt__word { font-size: min(23vw, 30vh); }
  .bt__scape { top: calc(var(--bt-horizon) - 15%); height: 15%; }

  .bt__lead { display: none; }
  .bt__dock { padding-right: 3.6rem; }
  .bt__ctrl { width: 100%; grid-template-columns: auto 1fr; grid-template-rows: auto auto; row-gap: 8px; }
  .bt__modes { display: none; }
  .bt__knob { --k: 88px; grid-column: 1; grid-row: 2; }
  .bt__turn { grid-column: 1; grid-row: 1; }
  .bt__cap {
    grid-column: 2; grid-row: 1 / 3;
    justify-self: start;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 6px;
    text-align: left;
    max-width: 26ch;
  }
  .bt__name {
    display: block;
    font: 400 1.6rem/1 var(--font-display);
    letter-spacing: 0.01em;
    text-transform: uppercase;
    color: var(--text);
  }
  .bt__cap b { font-size: 11px; }
  .bt__hint { display: none; }      /* no room under the bot on phones; the button above says it */

  /* kit = bottom sheet; while open, the headline + dial step aside and the bot lifts */
  .bt-kit {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 950;
    width: auto;
    justify-self: stretch;     /* fixed + inside a grid: stretch to the full viewport width */
    align-self: end;
    margin: 0;
    padding: 24px 20px calc(18px + env(safe-area-inset-bottom));
    grid-template-columns: 1fr 1fr;
    column-gap: 18px;
    row-gap: 18px;
    border-radius: 20px 20px 0 0;
    border-width: 1px 0 0;
    background: color-mix(in srgb, var(--surface) 94%, transparent);
    box-shadow: 0 -24px 60px -30px rgba(0, 0, 0, 0.6);
    transform: translateY(105%);
    opacity: 1;
    transition: transform 0.6s var(--ease-out), visibility 0.6s;
  }
  .bt-kit::before {           /* grabber */
    content: "";
    position: absolute;
    left: 50%; top: 9px;
    width: 36px; height: 4px;
    border-radius: 4px;
    transform: translateX(-50%);
    background: var(--line2);
  }
  .bt-kit__head, .bt-kit__foot,
  .bt-kit__row:not(.bt-kit__row--range) { grid-column: 1 / -1; }
  .bt-kit__sws { gap: 12px; }
  .bt-kit__sw { width: 32px; height: 32px; }
  .bt-kit__btn { height: 44px; }
  .bt.is-kit .bt__head,
  .bt.is-kit .bt__dock { opacity: 0; }
  .bt.is-kit .bt__head *,
  .bt.is-kit .bt__dock * { pointer-events: none; }
  html.bt-sheet .mx { opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; }
}

/* short landscape screens */
@media (max-height: 640px) and (min-width: 761px) {
  .bt__ui { padding-top: 96px; }
  .bt__title { font-size: clamp(2.2rem, 9vh, 3.6rem); }
}

@media (prefers-reduced-motion: reduce) {
  .bt__hint i { animation: none; }
  .bt-kit, .bt-kit__toggle { transition-duration: 0.01s; }
}