/* ————————————————————————————————————————————————
   See What I See — VSS simulator
   light SaaS aesthetic: soft sky-gradient canvas, white
   rounded cards, navy text, electric-blue accent, one
   blue gradient highlight card.
———————————————————————————————————————————————— */

:root {
  --canvas: #eef3fa;
  --canvas-top: #dfeafc;
  --card: #ffffff;
  --card-line: #e6edf7;
  --chip-bg: #f1f5fb;
  --chip-hover: #e7edf7;
  --line-2: #d7e0ee;
  --text: #0e1b33;
  --text-dim: #51607a;
  --text-faint: #8b97ac;
  --accent: #2f6bff;
  --accent-strong: #1f56e0;
  --accent-soft: rgba(47, 107, 255, 0.1);
  --grad-blue: linear-gradient(135deg, #4f86ff 0%, #2258e8 100%);
  --radius: 16px;
  --panel-w: 384px;
  --shadow-card: 0 1px 2px rgba(16, 34, 70, .05), 0 10px 28px rgba(16, 34, 70, .06);
  --shadow-pop: 0 14px 44px rgba(16, 34, 70, .16);
  font-size: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  background: var(--canvas);
  color: var(--text);
  font-family: "Instrument Sans", system-ui, sans-serif;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

body {
  display: grid;
  grid-template-columns: 1fr var(--panel-w);
  height: 100dvh;
}

/* ————— stage ————— */

#stage { position: relative; overflow: hidden; background: #0b0d10; }

#glcanvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  display: block;
  touch-action: none;
}

#brand {
  position: absolute; top: 20px; left: 24px;
  pointer-events: none;
  color: #fff;
  text-shadow: 0 1px 14px rgba(0,0,0,.65), 0 0 2px rgba(0,0,0,.5);
  animation: fade-down .7s .1s cubic-bezier(.2,.7,.2,1) backwards;
  display: flex; align-items: center; gap: 11px;
}
#brand-logo {
  width: 40px; height: 40px; flex: none;
  border-radius: 50%;
  background: linear-gradient(135deg, #20c9a7 0%, #1295cd 100%);
  display: grid; place-items: center;
  box-shadow: 0 2px 12px rgba(10, 40, 45, .45), inset 0 1px 0 rgba(255,255,255,.25);
}
#brand-logo svg { display: block; }
#brand h1 {
  font-family: "Sora", sans-serif;
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
#brand p {
  font-size: .76rem;
  opacity: .82;
  margin-top: 2px;
  letter-spacing: .01em;
}

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

#stage-actions {
  position: absolute;
  left: 24px; bottom: max(20px, env(safe-area-inset-bottom));
  display: flex; gap: 10px; flex-wrap: wrap;
  animation: fade-down .7s .25s cubic-bezier(.2,.7,.2,1) backwards;
}

.stage-btn {
  appearance: none;
  border: 1px solid rgba(255,255,255,.4);
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  color: var(--text);
  font: inherit; font-size: .82rem; font-weight: 500;
  padding: 9px 15px;
  border-radius: 100px;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 7px;
  box-shadow: 0 2px 14px rgba(10,14,24,.22);
  transition: background .15s, transform .1s;
  user-select: none; -webkit-user-select: none;
}
.stage-btn:hover { background: rgba(255,255,255,.95); }
.stage-btn:active { transform: scale(.97); }
.stage-btn .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(47,107,255,.8);
}
#btn-compare.holding {
  background: var(--grad-blue);
  border-color: transparent;
  color: #fff;
}
#btn-compare.holding .dot { background: #fff; }

.only-mobile { display: none; }

/* mute toggle — top-right, only visible while tinnitus is playing */
.mute-btn {
  position: absolute; top: 20px; right: 24px;
  width: 42px; height: 42px; border-radius: 50%;
  appearance: none; cursor: pointer;
  border: 1px solid rgba(255,255,255,.4);
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  color: var(--text);
  box-shadow: 0 2px 14px rgba(10,14,24,.22);
  transition: background .15s, transform .1s;
  z-index: 20;
}
.mute-btn:not([hidden]) { display: grid; place-items: center; }
.mute-btn:hover { background: rgba(255,255,255,.95); }
.mute-btn:active { transform: scale(.94); }
.mute-btn .ic-off { display: none; }
.mute-btn.muted { color: var(--accent-strong); }
.mute-btn.muted .ic-on { display: none; }
.mute-btn.muted .ic-off { display: block; }

/* live-camera group (mobile): a Live camera button that expands to
   Normal / VR options; emphasized because it's the best experience */
#cam-group { position: relative; }
/* options float above the Live camera button — absolute so the utility
   row never reflows when they appear */
#cam-options {
  position: absolute;
  left: 0; bottom: calc(100% + 8px);
  display: flex; gap: 8px;
  animation: cam-pop .16s ease-out;
}
#cam-group:not(.expanded) #cam-options { display: none; }
@keyframes cam-pop {
  from { opacity: 0; transform: translateY(6px); }
}
.cam-cta {
  border-color: var(--accent);
  color: var(--accent-strong);
  font-weight: 600;
  box-shadow: 0 2px 16px rgba(47, 107, 255, .35);
}
.cam-cta svg { opacity: .95; }
/* "Normal" is the recommended choice — emphasized as a filled accent pill */
.cam-opt-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(47, 107, 255, .4);
}
.cam-opt-primary:hover { background: var(--accent-strong); }

/* ————— split compare ————— */

#split-ui { position: absolute; inset: 0; pointer-events: none; }

#split-divider {
  position: absolute; top: 0; bottom: 0; left: 50%;
  width: 2px; margin-left: -1px;
  background: rgba(255,255,255,.9);
  box-shadow: 0 0 12px rgba(0,0,0,.45);
  pointer-events: auto;
  cursor: ew-resize;
  touch-action: none;
}
#split-divider::before {           /* wider invisible grab area */
  content: ""; position: absolute; top: 0; bottom: 0; left: -14px; right: -14px;
}
#split-handle {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: #fff; color: var(--text);
  font-size: .72rem; letter-spacing: .05em;
  padding: 8px 10px; border-radius: 100px;
  box-shadow: 0 2px 12px rgba(10,14,24,.35);
  white-space: nowrap;
  user-select: none; -webkit-user-select: none;
}
.split-label {
  position: absolute; top: 74px;
  font-size: .72rem; font-weight: 600; letter-spacing: .04em;
  color: #fff;
  background: rgba(15,18,24,.55);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  padding: 5px 11px; border-radius: 100px;
}
#split-label-l { left: 16px; }
#split-label-r { right: 16px; }

#vr-hint {
  position: absolute; left: 50%; top: 24px; transform: translateX(-50%);
  font-size: .8rem; color: #fff;
  background: rgba(15,18,24,.55);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  padding: 8px 16px; border-radius: 100px;
  pointer-events: none;
}

#toast {
  position: absolute; left: 50%; bottom: 84px; transform: translateX(-50%);
  background: #14213d; color: #f2f6fd;
  font-size: .85rem;
  padding: 11px 18px; border-radius: 12px;
  box-shadow: var(--shadow-pop);
  max-width: min(90%, 420px); text-align: center;
  z-index: 40;
}

/* ————— control panel: cards on a sky-gradient canvas ————— */

#panel {
  background: linear-gradient(180deg, var(--canvas-top) 0%, var(--canvas) 260px);
  border-left: 1px solid rgba(16,34,70,.06);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 18px 18px calc(16px + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; gap: 14px;
  scrollbar-width: thin; scrollbar-color: var(--line-2) transparent;
}

#panel-grip { display: none; }
#panel-done { display: none; }   /* mobile-only; shown in the media query */

.panel-block {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-card);
}

.block-title {
  font-family: "Sora", sans-serif;
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 10px;
}

.chip-row { display: flex; flex-wrap: wrap; gap: 7px; }

.chip {
  appearance: none; font: inherit; font-size: .82rem; font-weight: 500;
  color: var(--text-dim);
  background: var(--chip-bg);
  border: 1px solid transparent;
  padding: 7px 13px; border-radius: 100px;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  transition: color .15s, border-color .15s, background .15s;
}
.chip:hover { color: var(--text); background: var(--chip-hover); }
.chip.active {
  color: #fff;
  background: var(--grad-blue);
  box-shadow: 0 3px 10px rgba(47,107,255,.35);
}
.chip-cam svg { opacity: .8; }

/* ————— symptom sliders: one card per symptom group ————— */

#sliders {
  background: none; border: none; box-shadow: none; padding: 0;
  display: flex; flex-direction: column; gap: 14px;
}

.sym-group {
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-card);
}

.sym-group > h3 {
  font-family: "Sora", sans-serif;
  font-weight: 600;
  font-size: .92rem;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 2px;
}
.sym-group > .sym-note {
  font-size: .74rem;
  color: var(--text-faint);
  margin-bottom: 12px;
}

.ctl { margin-bottom: 12px; }
.ctl:last-child { margin-bottom: 2px; }
.ctl label {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: .82rem; color: var(--text-dim);
  margin-bottom: 5px;
}
.ctl label .val {
  font-variant-numeric: tabular-nums;
  font-size: .74rem; color: var(--text-faint);
}

.ctl input[type="range"] {
  appearance: none; -webkit-appearance: none;
  width: 100%; height: 22px;
  background: transparent;
  cursor: pointer;
  --fill: 0%;
}
.ctl input[type="range"]::-webkit-slider-runnable-track {
  height: 5px; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent) var(--fill), #e4eaf4 var(--fill));
}
.ctl input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 17px; height: 17px; margin-top: -6px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--line-2);
  box-shadow: 0 1px 6px rgba(16,34,70,.25);
  transition: transform .1s;
}
.ctl input[type="range"]:active::-webkit-slider-thumb {
  transform: scale(1.25);
  border-color: var(--accent);
}
.ctl input[type="range"]::-moz-range-track {
  height: 5px; border-radius: 3px;
  background: linear-gradient(90deg, var(--accent) var(--fill), #e4eaf4 var(--fill));
}
.ctl input[type="range"]::-moz-range-thumb {
  width: 17px; height: 17px;
  border: 1px solid var(--line-2); border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 6px rgba(16,34,70,.25);
}

/* touch screens: the row (not the native input) owns the gesture — taps do
   nothing, horizontal drags adjust relatively, vertical swipes scroll */
@media (pointer: coarse) {
  .ctl { touch-action: pan-y; }
  .ctl input[type="range"] { pointer-events: none; }
}

.ctl-toggle {
  display: flex; align-items: center; justify-content: space-between;
  font-size: .82rem; color: var(--text-dim);
  margin-bottom: 2px;
}
.switch {
  appearance: none; width: 38px; height: 22px;
  background: var(--line-2); border-radius: 100px;
  position: relative; cursor: pointer;
  transition: background .18s;
  flex: none;
}
.switch::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(16,34,70,.3);
  transition: left .18s;
}
.switch:checked { background: var(--accent); }
.switch:checked::after { left: 18px; }

/* ————— share: the blue gradient highlight card ————— */

#share-block {
  background: var(--grad-blue);
  border: none;
  color: #fff;
  box-shadow: 0 10px 30px rgba(34, 88, 232, .35);
}
#share-block .fine { color: rgba(255,255,255,.75); }

.share-tools { display: flex; gap: 8px; margin-top: 10px; }
.tool-btn {
  appearance: none; font: inherit; font-size: .8rem; font-weight: 600;
  flex: 1;
  background: rgba(255,255,255,.16);
  color: #fff;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 9px;
  padding: 9px 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, transform .1s;
}
.tool-btn:hover { background: rgba(255,255,255,.26); }
.tool-btn:active { transform: scale(.97); }

.wide-btn {
  appearance: none; font: inherit; font-size: .88rem;
  width: 100%;
  background: #fff;
  color: var(--accent-strong);
  border: none; border-radius: 11px;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: .01em;
  box-shadow: 0 2px 10px rgba(10, 24, 60, .18);
  transition: transform .1s, box-shadow .15s;
}
.wide-btn em { font-style: italic; }
.wide-btn:hover { box-shadow: 0 4px 16px rgba(10, 24, 60, .25); }
.wide-btn:active { transform: scale(.985); }

.fine { font-size: .74rem; color: var(--text-faint); line-height: 1.5; margin-top: 9px; }

#panel-footer {
  margin-top: auto;
  padding: 4px 4px 0;
  display: flex; flex-direction: column; gap: 6px;
  font-size: .78rem;
}
#panel-footer a { color: var(--text-faint); text-decoration: none; }
#panel-footer a:hover { color: var(--accent-strong); }
.link-btn {
  appearance: none; background: none; border: none;
  font: inherit; font-size: .78rem;
  color: var(--text-dim); text-align: left;
  cursor: pointer; padding: 0;
}
.link-btn:hover { color: var(--accent-strong); }

/* ————— dialogs (about + intro) ————— */

#about, #intro, #source-pick, #qr-dialog {
  border: none;
  border-radius: 20px;
  background: var(--card);
  color: var(--text);
  max-width: 560px; width: calc(100% - 40px);
  max-height: 85dvh;
  padding: 0;
  margin: auto;
  box-shadow: var(--shadow-pop);
}
#about::backdrop, #intro::backdrop, #source-pick::backdrop, #qr-dialog::backdrop { background: rgba(14, 27, 51, .4); backdrop-filter: blur(4px); }
#about article, #intro article, #source-pick article, #qr-dialog article { padding: 28px; overflow-y: auto; max-height: 85dvh; }
#about h2, #intro h2, #source-pick h2, #qr-dialog h2 {
  font-family: "Sora", sans-serif; font-weight: 600;
  letter-spacing: -0.02em;
  font-size: 1.35rem; margin-bottom: 14px;
}
#about p, #about ul, #intro p, #source-pick p, #qr-dialog p { font-size: .9rem; line-height: 1.65; color: var(--text-dim); margin-bottom: 12px; }
#about strong, #intro strong { color: var(--text); }

/* first-visit source chooser */
#source-pick { max-width: 460px; }
.pick-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 18px; }
#pick-cam {
  background: var(--grad-blue); color: #fff;
  display: flex; align-items: center; justify-content: center; gap: 9px;
  box-shadow: 0 6px 18px rgba(34, 88, 232, .3);
}
#pick-scene { text-align: center; }
#about ul { padding-left: 20px; }
#about li { margin-bottom: 6px; }
#about a { color: var(--accent-strong); }
#about form, #intro form { margin-top: 18px; }
#about form .wide-btn, #intro form .wide-btn {
  background: var(--grad-blue);
  color: #fff;
  box-shadow: 0 6px 18px rgba(34, 88, 232, .3);
}

#intro { max-width: 480px; }
#intro article { outline: none; }          /* focused container, no ring */
.intro-head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 14px;
}
#intro .intro-head h2 { margin-bottom: 0; }
.intro-mark {
  width: 44px; height: 44px; border-radius: 50%; flex: none;
  background: linear-gradient(135deg, #20c9a7 0%, #1295cd 100%);
  display: grid; place-items: center;
  box-shadow: 0 6px 18px rgba(18, 149, 205, .35);
}
#intro .intro-shared {
  display: flex; gap: 10px; align-items: flex-start;
  background: var(--accent-soft);
  border: 1px solid rgba(47, 107, 255, .25);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 16px;
  font-size: .85rem;
  line-height: 1.55;
  color: var(--text-dim);
}
#intro .intro-shared[hidden] { display: none; }
.intro-shared svg { flex: none; margin-top: 3px; color: var(--accent-strong); }
.intro-shared strong { color: var(--accent-strong); }

.intro-steps {
  list-style: none;
  counter-reset: step;
  display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 14px;
}
.intro-steps li {
  counter-increment: step;
  position: relative;
  padding-left: 40px;
  font-size: .9rem; line-height: 1.55; color: var(--text-dim);
}
.intro-steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 1px;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent-strong);
  font-family: "Sora", sans-serif; font-weight: 600; font-size: .8rem;
  display: grid; place-items: center;
}

/* ————— VR mode ————— */

body.vr #panel, body.vr #brand, body.vr #stage-actions, body.vr #btn-panel, body.vr #btn-mute { display: none; }

/* ————— mobile controls CTA (base reset; positioned in media query) ————— */

#btn-panel {
  appearance: none; font: inherit; cursor: pointer;
  display: none; align-items: center;
  -webkit-user-select: none; user-select: none;
}

@keyframes cta-pulse {
  0%, 100% { box-shadow: 0 8px 26px rgba(34, 88, 232, .42); }
  50%      { box-shadow: 0 8px 30px rgba(34, 88, 232, .42), 0 0 0 8px rgba(47, 107, 255, .18); }
}

.intro-actions { display: flex; flex-direction: row; align-items: center; gap: 12px; }
.intro-actions .wide-btn { flex: 1; }
.intro-actions .link-btn { flex: none; white-space: nowrap; }

/* ————— guided walkthrough (coach marks) ————— */

#tour { position: fixed; inset: 0; z-index: 90; }

#tour-hole {
  position: absolute;
  border-radius: 14px;
  box-shadow: 0 0 0 9999px rgba(10, 18, 34, .66);
  transition: top .28s cubic-bezier(.3,.8,.3,1), left .28s cubic-bezier(.3,.8,.3,1),
              width .28s cubic-bezier(.3,.8,.3,1), height .28s cubic-bezier(.3,.8,.3,1);
  pointer-events: none;
}

#tour-pop {
  position: absolute;
  width: min(320px, calc(100vw - 32px));
  background: var(--card);
  border-radius: 16px;
  padding: 18px;
  box-shadow: var(--shadow-pop);
  transition: top .28s cubic-bezier(.3,.8,.3,1), left .28s cubic-bezier(.3,.8,.3,1);
}
#tour-step {
  font-family: "Sora", sans-serif; font-size: .68rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase; color: var(--accent);
}
#tour-title {
  font-family: "Sora", sans-serif; font-weight: 600; font-size: 1.05rem;
  letter-spacing: -0.01em; color: var(--text);
  margin: 5px 0 6px;
}
#tour-body { font-size: .88rem; line-height: 1.55; color: var(--text-dim); }
#tour-nav {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 16px; gap: 10px;
}
.tour-nav-right { display: flex; gap: 8px; }
.tour-btn {
  appearance: none; font: inherit; font-size: .84rem; font-weight: 600;
  border: none; border-radius: 9px; padding: 8px 15px; cursor: pointer;
  background: var(--accent); color: #fff;
  transition: background .15s, transform .1s;
}
.tour-btn:hover { background: var(--accent-strong); }
.tour-btn:active { transform: scale(.97); }
.tour-btn.ghost { background: var(--chip-bg); color: var(--text-dim); }
.tour-btn.ghost:hover { background: var(--chip-hover); color: var(--text); }
.tour-link {
  appearance: none; background: none; border: none; font: inherit;
  font-size: .82rem; color: var(--text-faint); cursor: pointer; padding: 4px 0;
}
.tour-link:hover { color: var(--text-dim); }
body.vr { grid-template-columns: 1fr; }

/* ————— mobile: bottom sheet ————— */

@media (max-width: 860px) {
  body { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }

  .only-mobile { display: inline-flex; }

  #brand { top: 14px; left: 16px; }
  #brand h1 { font-size: 1.02rem; }

  /* utility actions become secondary, tucked above the primary CTA with a
     clear gap (CTA bottom offset + its ~50px height + breathing room) */
  #stage-actions {
    left: 16px; right: 16px;
    bottom: calc(max(14px, env(safe-area-inset-bottom)) + 68px);
    gap: 7px;
  }
  #stage-actions .stage-btn { font-size: .72rem; padding: 7px 10px; white-space: nowrap; }

  /* the primary way in: a prominent, full-width control opener */
  #btn-panel {
    display: flex;               /* ID selector, to beat the base reset */
    position: fixed;
    left: 16px; right: 16px;
    bottom: max(14px, env(safe-area-inset-bottom));
    justify-content: center;
    gap: 9px;
    background: var(--grad-blue);
    color: #fff;
    border: none;
    border-radius: 14px;
    padding: 15px 18px;
    font-size: .96rem; font-weight: 600;
    box-shadow: 0 8px 26px rgba(34, 88, 232, .42);
    z-index: 26;
  }
  #btn-panel .chev { margin-left: 2px; opacity: .9; }
  /* draw attention until the panel has been opened at least once */
  body:not(.controls-used) #btn-panel { animation: cta-pulse 2.1s ease-in-out infinite; }
  body.panel-open #btn-panel { display: none; }

  #panel {
    position: fixed; left: 0; right: 0; bottom: 0;
    border-left: none;
    border-top: 1px solid rgba(16,34,70,.06);
    border-radius: 22px 22px 0 0;
    max-height: 62dvh;
    transform: translateY(100%);
    transition: transform .32s cubic-bezier(.3,.8,.3,1);
    z-index: 30;
    padding-top: 6px;
    box-shadow: 0 -14px 50px rgba(16,34,70,.25);
  }
  body.panel-open #panel { transform: translateY(0); }

  #panel-grip {
    display: flex; justify-content: center;
    padding: 10px 0 12px; cursor: grab; flex: none;
    touch-action: none;             /* we handle the drag ourselves */
  }
  #panel-grip span {
    width: 42px; height: 5px; border-radius: 3px; background: var(--line-2);
  }
  #panel.dragging { transition: none; }   /* follow the finger without lag */

  /* sticky Done button: always in reach while scrolling the settings */
  #panel-done {
    display: block;
    position: sticky; bottom: 0;
    z-index: 5;
    appearance: none; font: inherit; cursor: pointer;
    width: 100%;
    background: var(--grad-blue); color: #fff;
    border: none; border-radius: 12px;
    padding: 13px 16px;
    font-size: .92rem; font-weight: 600;
    box-shadow: 0 -10px 24px rgba(244, 247, 252, .9), 0 6px 18px rgba(34, 88, 232, .35);
  }

  /* VR is reached via the Live camera group on mobile; the panel's own
     camera chip is redundant here, so hide it */
  #btn-vr { display: none; }
  #scene-chips .chip-cam { display: none; }

  /* Live camera sits on the same line as compare / split; its Normal / VR
     options pop up into empty canvas above the single row */
}

/* ————— QR dialog ————— */

#qr-dialog { max-width: 380px; }
.qr-article { text-align: center; }
#qr-box {
  display: flex; justify-content: center;
  background: #fff;
  border: 1px solid var(--card-line);
  border-radius: 14px;
  padding: 14px;
  margin: 4px auto 14px;
  width: fit-content;
}
#qr-box svg { display: block; width: 220px; height: 220px; }

/* ————— About: "what can help" ————— */

.about-sub {
  font-family: "Sora", sans-serif; font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 1.05rem;
  margin: 18px 0 8px;
}