/* First run (Bead v3 §3.2): Welcome and its steps (goal, how much a day, age, the test intro, the guess), "Your
   day-one numbers" (measured), "Your plan", the reminder question; and "How Bead works" (science). Tokens are
   prefixed --ob- so they never collide with the other stylesheets; light and dark values sit in the same three blocks
   bead.css uses. Vermilion marks only seals. A picked option is told apart by an ink edge, a raised card and a filled
   dot (a shape), never by colour alone; every target is at least 44 px. */

:root {
  --ob-seal: #B5382A;
  --ob-seal-blend: multiply;
  --ob-card: rgba(251, 250, 247, 0.74);
  --ob-card-edge: rgba(28, 27, 26, 0.07);
  --ob-card-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset, 0 1px 2px rgba(28, 27, 26, 0.05), 0 18px 36px -24px rgba(28, 27, 26, 0.35);
  --ob-sheen: rgba(255, 255, 255, 0.55);
  --ob-pick-on: #E5E0D6;
  --ob-grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .11 0 0 0 0 .1 0 0 0 0 .09 0 0 0 .4 -.165'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  --ob-fiber: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='420' height='420'%3E%3Cfilter id='f' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.006 .011' numOctaves='4' seed='4' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .35 0 0 0 0 .31 0 0 0 0 .25 0 0 0 .3 -.135'/%3E%3C/filter%3E%3Crect width='420' height='420' filter='url(%23f)'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --ob-seal: #C9472F;
    --ob-seal-blend: normal;
    --ob-card: rgba(31, 30, 28, 0.78);
    --ob-card-edge: rgba(236, 232, 225, 0.06);
    --ob-card-shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 18px 36px -22px rgba(0, 0, 0, 0.9);
    --ob-sheen: rgba(255, 255, 255, 0.025);
    --ob-pick-on: #2C2A27;
    --ob-grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .3 -.12'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
    --ob-fiber: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='420' height='420'%3E%3Cfilter id='f' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.006 .011' numOctaves='4' seed='4' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .9 0 0 0 0 .88 0 0 0 0 .84 0 0 0 .2 -.09'/%3E%3C/filter%3E%3Crect width='420' height='420' filter='url(%23f)'/%3E%3C/svg%3E");
  }
}
:root[data-theme='dark'] {
  --ob-seal: #C9472F;
  --ob-seal-blend: normal;
  --ob-card: rgba(31, 30, 28, 0.78);
  --ob-card-edge: rgba(236, 232, 225, 0.06);
  --ob-card-shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 18px 36px -22px rgba(0, 0, 0, 0.9);
  --ob-sheen: rgba(255, 255, 255, 0.025);
  --ob-pick-on: #2C2A27;
  --ob-grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .3 -.12'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
  --ob-fiber: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='420' height='420'%3E%3Cfilter id='f' x='0' y='0' width='100%25' height='100%25'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.006 .011' numOctaves='4' seed='4' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .9 0 0 0 0 .88 0 0 0 0 .84 0 0 0 .2 -.09'/%3E%3C/filter%3E%3Crect width='420' height='420' filter='url(%23f)'/%3E%3C/svg%3E");
}

/* ================================================================ shared */

/* paper with fibre and grain, a soft sheen at the top */
.ob-screen {
  background-color: var(--paper);
  background-image: radial-gradient(120% 60% at 50% -6%, var(--ob-sheen), transparent 62%), var(--ob-fiber), var(--ob-grain);
}
.page.ob-page { gap: 0; padding-top: max(calc(var(--safe-top) + 12px), 44px); padding-bottom: calc(var(--safe-bottom) + 24px); }
.page.ob-page.measured, .page.ob-page.plan, .page.ob-page.reminder, .page.ob-page.science, .page.ob-page.ob-open, .page.ob-page.ob-intro { padding-bottom: 0; }
.ob-sr { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.ob-eb { margin: 0; font-size: 11px; line-height: 1.3; letter-spacing: 1.6px; text-transform: uppercase; color: var(--ink-2); font-weight: 500; }
.ob-ttl { margin: 6px 0 0; font-family: var(--serif); font-weight: 400; font-size: 42px; line-height: 1; letter-spacing: -0.4px; }
.ob-ttl:focus { outline: none; }
.ob-lede { margin: 8px 0 0; font-size: 15px; line-height: 1.5; color: var(--ink-2); text-wrap: pretty; }
.ob-card { background: var(--ob-card); border: 1px solid var(--ob-card-edge); border-radius: 22px; box-shadow: var(--ob-card-shadow); }
.btn.ob-pill { border: none; box-shadow: 0 10px 24px -14px rgba(28, 27, 26, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.12); flex: none; }
/* the main button stays in reach on short phones */
.ob-foot { position: sticky; bottom: 0; z-index: 2; margin: 10px -24px 0; padding: 14px 24px calc(var(--safe-bottom) + 24px);
  background-color: var(--paper); background-image: var(--ob-fiber), var(--ob-grain); background-attachment: fixed;
  -webkit-mask-image: linear-gradient(to bottom, transparent, #000 13px); mask-image: linear-gradient(to bottom, transparent, #000 13px); }
.ob-foot .ob-fine { text-align: center; margin-top: 12px; font-size: 12.5px; }
.ob-top { flex: none; }
.ob-skip { min-height: 44px; min-width: 44px; padding: 0 12px; border: none; background: transparent; font-size: 15px; color: var(--ink-2); border-radius: 22px; }
.ob-skip:focus-visible, .ob-link:focus-visible, .ob-inline-link:focus-visible { outline: 1.5px solid var(--ink); outline-offset: 2px; }
.ob-inline-link { display: inline; min-height: 44px; padding: 12px 2px; margin: -12px 0; border: none; background: transparent; font: inherit; color: var(--ink); text-decoration: underline; text-decoration-color: var(--ink-3); text-underline-offset: 3px; }
.ob-inline-link[aria-disabled='true'] { color: var(--ink-2); text-decoration: none; }

/* ================================================================ 1 · welcome */

.page.welcome.ob-page { align-items: stretch; }
.ob-brand { display: flex; align-items: center; gap: 10px; height: 36px; flex: none; }
.ob-brand .serif { font-size: 24px; line-height: 1; }
.ob-brand-seal { display: block; flex: none; overflow: visible; }
.ob-seal-ink { mix-blend-mode: var(--ob-seal-blend); }
.ob-seal-fill { fill: var(--ob-seal); }
.ob-seal-serif { font-family: var(--serif); }
.ob-open-mid { flex: 1; display: flex; flex-direction: column; justify-content: center; padding: 14px 0 8px; }
.ob-disp { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 44px; line-height: 1.02; letter-spacing: -0.6px; text-wrap: balance; }
.ob-disp:focus { outline: none; }
.ob-hero-sub { margin: 12px 0 0; font-size: 16px; line-height: 1.45; color: var(--ink-2); text-wrap: pretty; }
.ob-demo-wrap { margin-top: 22px; display: flex; flex-direction: column; align-items: center; gap: 8px; }
.ob-demo-cap { margin: 0; font-size: 12px; color: var(--ink-2); }
.ob-restore-note { margin: 6px 0 0; min-height: 0; font-size: 13px; line-height: 1.45; text-align: center; color: var(--ink); text-wrap: pretty; }
.ob-restore-note:empty { display: none; }

/* the Schulte Table playing by itself: the exercise's own dark stage, thin lines, light digits, found ones fade */
.ob-demo { --ob-demo-w: min(100%, 272px); margin: 0; width: var(--ob-demo-w); padding: 12px 12px 14px; border-radius: 22px; border: 1px solid var(--ob-card-edge); background: var(--stage); color: var(--stage-ink); box-shadow: 0 18px 40px -26px rgba(28, 27, 26, 0.75); }
.ob-demo-head { display: flex; justify-content: space-between; align-items: baseline; padding: 0 2px 10px; font-size: 13px; font-weight: 300; }
.ob-demo-next { color: var(--stage-dim); font-variant-numeric: tabular-nums; }
.ob-demo-grid { display: grid; grid-template-columns: repeat(var(--n), minmax(0, 1fr)); aspect-ratio: 1; border-top: 1px solid #3A3835; border-left: 1px solid #3A3835; font-size: 21px; font-weight: 300; font-variant-numeric: tabular-nums; transition: opacity 0.35s; }
.ob-demo-grid.ob-demo-fade { opacity: 0; }
.ob-demo-cell { display: flex; align-items: center; justify-content: center; border-right: 1px solid #3A3835; border-bottom: 1px solid #3A3835; color: var(--stage-ink); transition: color 0.25s; position: relative; }
.ob-demo-cell span { display: block; line-height: 1; }
.ob-demo-cell.found { color: var(--stage-faint); }
/* a tap: a soft ring under the finger */
.ob-demo-cell.hit::after { content: ''; position: absolute; inset: 18%; border-radius: 50%; border: 1px solid var(--stage-ink); opacity: 0; animation: ob-tap 0.32s ease-out; }
@keyframes ob-tap { 0% { opacity: 0.6; transform: scale(0.6); } 100% { opacity: 0; transform: scale(1.15); } }

/* ================================================================ 2 · the one-tap questions */

.ob-ask .ob-ask-t { margin-top: 4px; font-size: 34px; line-height: 1.05; letter-spacing: -0.3px; text-wrap: balance; }
.ob-opts { margin-top: 22px; display: flex; flex-direction: column; gap: 9px; }
.ob-opt { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 58px; padding: 12px 14px 12px 18px; border-radius: 16px; border: 1px solid var(--line); background: transparent; text-align: left; color: var(--ink); transition: background-color 0.18s, border-color 0.18s, box-shadow 0.18s; }
.ob-opt-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.ob-opt-t { font-family: var(--serif); font-size: 21px; line-height: 1.1; }
.ob-opt-l { font-size: 13.5px; line-height: 1.4; color: var(--ink-2); text-wrap: pretty; }
.ob-opt-side { flex: none; font-size: 14px; color: var(--ink-2); font-variant-numeric: tabular-nums lining-nums; }
.ob-opt.on { border-color: var(--ink); background: var(--ob-card); box-shadow: var(--ob-card-shadow); }
.ob-opt:active { transform: scale(0.99); }
.ob-opt:focus-visible { outline: 1.5px solid var(--ink); outline-offset: 2px; }
.ob-dot { position: relative; width: 22px; height: 22px; border-radius: 50%; border: 1.2px solid var(--slot); flex: none; }
.ob-opt.on .ob-dot { border-color: var(--ink); }
.ob-opt.on .ob-dot::after { content: ''; position: absolute; inset: 4px; border-radius: 50%; background: var(--ink); }
/* a grid of short answers (age, the guess) */
.ob-opts-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.ob-opts-grid .ob-opt { min-height: 56px; padding: 0 14px; justify-content: center; }
.ob-opts-grid .ob-opt.wide { grid-column: 1 / -1; }
.ob-opts-grid .ob-opt-main { flex: none; align-items: center; }
.ob-opts-grid .ob-opt-t { font-family: var(--sans); font-size: 16px; font-variant-numeric: lining-nums; }
.ob-opts-grid .ob-dot { display: none; }
.ob-opts-guess .ob-opt { min-height: 76px; }
.ob-opts-guess .ob-opt-t { font-family: var(--serif); font-size: 30px; letter-spacing: -0.3px; font-variant-numeric: tabular-nums lining-nums; }
.ob-after { margin-top: 14px; font-size: 13px; }

/* the test intro: the three challenges, each with its moving tile */
.ob-intro .ob-eb { margin-top: 6px; }
.ob-tests { list-style: none; margin: 20px 0 0; padding: 0; display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.ob-test { display: grid; grid-template-columns: 52px minmax(0, 1fr); gap: 14px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--line); }
.ob-test-prev { width: 52px; height: 52px; display: flex; border-radius: 12px; overflow: hidden; }
.ob-test-prev > .ex-preview { width: 100% !important; height: 100% !important; }
.ob-test-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.ob-test-nm { font-size: 20px; line-height: 1.15; }
.ob-test-l { font-size: 14px; line-height: 1.4; color: var(--ink-2); }

/* ================================================================ 3 · your day-one numbers */

.page.measured .ob-eb { margin-top: 6px; }
.ob-m-list { display: flex; flex-direction: column; margin-top: 14px; border-top: 1px solid var(--line); }
.ob-m-row { padding: 13px 0 14px; border-bottom: 1px solid var(--line); }
.ob-m-eb { font-size: 11px; letter-spacing: 1.1px; text-transform: uppercase; color: var(--ink-2); margin: 0; font-weight: 500; }
.ob-m-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; margin-top: 3px; }
.ob-m-big { font-family: var(--serif); font-size: 48px; line-height: 0.95; letter-spacing: -1px; white-space: nowrap; font-variant-numeric: tabular-nums lining-nums; }
.ob-m-big small { font-size: 20px; letter-spacing: 0; margin-left: 3px; color: var(--ink-2); }
.ob-m-big small.of { font-size: 24px; margin-left: 0; }
.ob-m-line { margin: 5px 0 0; font-size: 14.5px; line-height: 1.38; }
.ob-m-label { margin: 6px 0 0; display: inline-block; font-size: 11.5px; line-height: 1.3; padding: 3px 9px; border-radius: 10px; border: 1px solid var(--line); color: var(--ink); }
.ob-m-norm { margin: 4px 0 0; font-size: 13.5px; line-height: 1.45; color: var(--ink-2); text-wrap: pretty; }
.ob-m-guess { margin: 8px 0 0; font-size: 14.5px; line-height: 1.4; font-weight: 500; }
.ob-viz { display: block; overflow: visible; max-width: 50%; margin-bottom: 7px; flex: none; }
.ob-viz.grid { margin-bottom: 4px; }
.ob-sq { fill: var(--ink); }
.ob-sq.open { fill: none; stroke: var(--ink-3); stroke-width: 1; }
.ob-sq.slip { fill: none; stroke: var(--ink-2); stroke-width: 1; stroke-dasharray: 2 1.8; }
.ob-cell { fill: var(--ink); }
.ob-dot3 { fill: none; stroke: var(--ink-2); stroke-width: 1; }
.ob-dot3.tapped { fill: var(--ink); stroke: var(--ink); }
/* Placed at Level N: the band's material bead, the level, its band */
.ob-placed { margin-top: 16px; display: flex; align-items: center; gap: 16px; padding: 14px 16px; border-radius: 20px; }
.ob-placed-bead { display: flex; flex: none; }
.ob-placed-bead svg { display: block; filter: drop-shadow(0 2px 2px rgba(28, 27, 26, 0.25)); }
.ob-placed-body { min-width: 0; }
.ob-placed-body p { margin: 0; }
.ob-placed-t { font-size: 26px; line-height: 1.1; }
.ob-placed-sub { margin-top: 2px !important; font-size: 13.5px; color: var(--ink-2); }
/* the three skills the test set, in their order: Focus 8 · Memory 6 · Reaction 11 */
.ob-placed-skills { margin-top: 6px !important; font-size: 14px; line-height: 1.4; font-weight: 500; font-variant-numeric: tabular-nums lining-nums; }
.ob-placed-l { margin-top: 6px !important; font-size: 13.5px; line-height: 1.45; text-wrap: pretty; }
.ob-m-foot { margin-top: 16px; text-align: center; font-size: 12px; }

/* ================================================================ 4 · how Bead works */

.ob-sci-list { margin-top: 14px; display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.ob-sci { padding: 15px 0 16px; border-bottom: 1px solid var(--line); }
.ob-sci-t { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 22px; line-height: 1.15; text-wrap: balance; }
.ob-sci-p { margin: 6px 0 0; font-size: 14.5px; line-height: 1.5; text-wrap: pretty; }
.ob-sci-cite { margin: 8px 0 0; font-size: 11.5px; line-height: 1.4; color: var(--ink-2); }
/* where the challenges come from: the three skills, each challenge with its task and papers (institutions as plain
   text), the not-affiliated line under them */
.ob-srcs { padding: 15px 0 16px; border-bottom: 1px solid var(--line); }
.ob-srcs-group { margin-top: 14px; }
.ob-srcs-skill { margin: 0; font-size: 11px; line-height: 1.3; letter-spacing: 1.4px; text-transform: uppercase; font-weight: 500; color: var(--ink-2); }
.ob-srcs-list { list-style: none; margin: 6px 0 0; padding: 0; display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.ob-srcs-ex { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 10px; align-items: start; padding: 10px 0 11px; border-bottom: 1px solid var(--line); }
.ob-srcs-ic { display: flex; padding-top: 2px; color: var(--ink); }
.ob-srcs-ic svg { display: block; }
.ob-srcs-body { min-width: 0; }
.ob-srcs-body p { margin: 0; }
.ob-srcs-nm { font-size: 18px; line-height: 1.2; }
.ob-srcs-p { margin-top: 2px !important; font-size: 13.5px; line-height: 1.4; text-wrap: pretty; }
.ob-srcs-basis { margin-top: 5px !important; font-size: 12px; line-height: 1.4; font-weight: 600; color: var(--ink); }
.ob-srcs-refs { margin-top: 1px !important; font-size: 12px; line-height: 1.5; color: var(--ink-2); }
.ob-srcs-known { margin-top: 5px !important; font-size: 12.5px; line-height: 1.45; color: var(--ink-2); text-wrap: pretty; }
.ob-srcs-note { margin: 14px 0 0; font-size: 12px; line-height: 1.5; }
.ob-sci.claims { margin-top: 16px; padding: 16px 16px 17px; border: 1px solid var(--ob-card-edge); border-radius: 18px; background: var(--ob-card); box-shadow: var(--ob-card-shadow); scroll-margin-top: 24px; }

/* ================================================================ 5 · your plan (Bead Plus's look: the paywall's first page) */

.ob-plan-screen { background: var(--paper); }
.ob-plan-brand { display: flex; align-items: center; gap: 10px; min-height: 44px; flex: none; }
.ob-plan-brand .k-seal, .ob-plan-brand svg { flex: none; }
.ob-plan-brand .serif { font-size: 22px; line-height: 1; }
.ob-plan-t { margin-top: 14px; font-size: 38px; line-height: 1.04; text-wrap: balance; }
.ob-ex-cards { list-style: none; margin: 20px 0 0; padding: 0; display: flex; flex-direction: column; gap: 9px; }
.ob-ex-card { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 14px; align-items: start; padding: 12px 14px 12px 12px; border-radius: 18px; background: var(--paper-2); border: 1px solid var(--line); }
.ob-ex-prev { width: 64px; height: 64px; border-radius: 14px; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.ob-ex-prev > .ex-preview { width: 100% !important; height: 100% !important; }
.ob-ex-body { min-width: 0; }
.ob-ex-nm { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.ob-ex-nm .serif { font-size: 21px; line-height: 1.1; }
.ob-ex-nm small { font-size: 11.5px; color: var(--ink-2); white-space: nowrap; }
.ob-ex-p { margin: 3px 0 0; font-size: 13.5px; line-height: 1.4; text-wrap: pretty; }
/* the source: what it is built on, then the paper with its institution (plain text: a fact about the task) */
.ob-src { margin: 7px 0 0; font-size: 11.5px; line-height: 1.4; color: var(--ink-2); padding: 4px 9px 5px; border-radius: 9px; border: 1px solid var(--line); display: inline-flex; flex-direction: column; text-wrap: pretty; }
.ob-src-k { font-weight: 600; color: var(--ink); }
.ob-src-note { margin: 10px 2px 0; font-size: 11.5px; line-height: 1.45; }
.ob-link { margin-top: 4px; min-height: 44px; padding: 0; border: none; background: transparent; display: inline-flex; align-items: center; font-size: 15px; font-weight: 500; color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; text-decoration-color: var(--ink-3); }
.ob-plan-all { margin-top: 12px; align-self: flex-start; text-align: left; }
.ob-plan-screen .ob-foot { background-image: none; }

/* ================================================================ 6 · the reminder question */

.page.reminder.ob-page .ob-plan-line { margin-top: 6px; color: var(--ink); }

/* ================================================================ short phones (iPhone SE) */

@media (max-height: 700px) {
  .page.ob-page { padding-top: max(calc(var(--safe-top) + 8px), 24px); }
  .ob-brand { height: 30px; }
  .ob-disp { font-size: 36px; }
  .ob-hero-sub { font-size: 15px; margin-top: 8px; }
  .ob-demo { --ob-demo-w: min(100%, 210px); padding: 9px 9px 10px; }
  .ob-demo-head { padding-bottom: 6px; font-size: 12px; }
  .ob-demo-grid { font-size: 16px; }
  .ob-demo-wrap { margin-top: 14px; }
  .ob-ask .ob-ask-t { font-size: 29px; }
  .ob-opts { margin-top: 16px; gap: 7px; }
  .ob-opt { min-height: 52px; padding-top: 9px; padding-bottom: 9px; }
  .ob-opts-guess .ob-opt { min-height: 64px; }
  .ob-ttl { font-size: 36px; }
  .ob-plan-t { font-size: 32px; }
  .ob-m-big { font-size: 42px; }
}
/* narrow phones */
@media (max-width: 360px) {
  .ob-disp { font-size: 38px; }
  .ob-m-big { font-size: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  .ob-opt, .ob-demo-grid, .ob-demo-cell { transition: none; }
  .ob-demo-cell.hit::after { animation: none; }
}