/* jabbi.app, shared by every page. Brand: brand/README.md.
   Charcoal for text, yellow only as brand accent, green for things people do. */
:root {
  --ink: #1A1A1A;
  --ink-soft: #4A4740;
  --paper: #F7F5EF;
  --card: #FFFFFF;
  --line: #E4E0D6;
  --yellow: #FFE500;
  --green: #1B8A5A;
  --green-text: #136B45;   /* darker so small text passes 4.5:1 on paper */
  --rust: #B4400F;
  --blue: #2A62C9;
  --head: "Bricolage Grotesque", system-ui, sans-serif;
  --body: "Atkinson Hyperlegible", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 18px/1.55 var(--body); }
a { color: inherit; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3 { font-family: var(--head); font-weight: 800; line-height: 1.08; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: clamp(30px, 5vw, 48px); max-width: 20ch; }
h3 { font-size: 22px; font-weight: 800; }
p { margin: 0; }
.eyebrow { font: 700 14px/1 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--green-text); margin-bottom: 14px; }
section { padding: 72px 0; }
section.alt { background: var(--card); border-block: 1px solid var(--line); }
.intro { margin-top: 16px; max-width: 52ch; color: var(--ink-soft); font-size: 19px; }
.grid { display: grid; gap: 16px; margin-top: 32px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 24px; }
.alt .card { background: var(--paper); }
.card p { color: var(--ink-soft); margin-top: 8px; }
.card.top-green { border-top: 6px solid var(--green); }
.card.top-blue { border-top: 6px solid var(--blue); }
.card.top-rust { border-top: 6px solid var(--rust); }
.card.top-ink { border-top: 6px solid var(--ink); }
.band { background: var(--ink); color: #F7F5EF; border-radius: 18px; padding: 22px 26px; margin-top: 24px; font-size: 19px; }
.band b { color: var(--yellow); }
.src { font-size: 14px; color: var(--ink-soft); margin-top: 22px; }
.more { display: inline-block; margin-top: 22px; font-weight: 700; color: var(--green-text); }

/* top bar */
.bar { position: sticky; top: 0; z-index: 5; background: var(--ink); }
.bar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 60px; }
.bar nav { display: flex; align-items: center; gap: 18px; }
.bar nav a.plain { color: #E9E6DD; text-decoration: none; font-weight: 700; font-size: 16px; }
.logo { display: flex; align-items: center; gap: 10px; color: #F7F5EF; text-decoration: none; font: 800 24px var(--head); }
.logo svg { width: 38px; height: 22px; }
.btn { display: inline-block; background: var(--yellow); color: var(--ink); font: 700 17px var(--body); text-decoration: none;
       border: 0; border-radius: 999px; padding: 12px 22px; cursor: pointer; }
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }

/* hero */
.hero { background: var(--ink); color: #F7F5EF; padding: 64px 0 80px; }
.hero .tag { font: 700 13px/1.4 var(--body); letter-spacing: .14em; text-transform: uppercase; color: var(--yellow); }
.hero h1 { font-size: clamp(40px, 7vw, 76px); color: var(--yellow); margin: 16px 0 22px; max-width: 14ch; }
.hero p.lede { font-size: clamp(19px, 2.3vw, 23px); max-width: 36ch; color: #E9E6DD; }
.hero .free { margin-top: 18px; font-weight: 700; color: #F7F5EF; }
.hero .free b { color: var(--yellow); }
.hero .cta { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero .cta span { color: #BDB8AC; font-size: 16px; }
.hero-grid { display: grid; gap: 48px; align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.25fr 1fr; } }

/* a sample session screen, drawn in HTML (no image) */
.phone { background: var(--paper); color: var(--ink); border-radius: 30px; border: 10px solid #2E2C28; max-width: 360px;
         width: 100%; margin: 0 auto; overflow: hidden; box-shadow: 0 24px 60px rgba(0,0,0,.35); }
.phone .ph-top { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 16px;
                 background: #fff; border-bottom: 1px solid var(--line); font-size: 14px; }
.phone .ph-top b { font-family: var(--head); font-size: 15px; }
.phone .ph-ask { border: 2px solid var(--ink); border-radius: 999px; padding: 2px 12px; font-weight: 700; font-size: 13px; }
.phone .ph-prog { height: 6px; background: var(--line); }
.phone .ph-prog i { display: block; height: 100%; width: 45%; background: var(--green); }
.phone .ph-body { padding: 18px 16px 20px; }
.phone .ph-label { font-size: 13px; color: var(--ink-soft); font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.phone .ph-q { font-size: 17px; line-height: 1.45; margin: 8px 0 14px; }
.phone .ph-opt { border: 2px solid var(--line); background: #fff; border-radius: 12px; padding: 9px 12px; font-size: 15px; margin-top: 8px; }
.phone .ph-opt.picked { border-color: var(--ink); }
.phone .ph-sure { display: flex; gap: 6px; margin-top: 14px; }
.phone .ph-sure span { flex: 1; text-align: center; border-radius: 10px; padding: 7px 0; font-size: 14px; font-weight: 700; background: #fff; border: 2px solid var(--line); }
.phone .ph-sure span.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.phone-note { text-align: center; color: #BDB8AC; font-size: 14px; margin-top: 14px; }

.stat { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
.stat .num { font: 800 clamp(48px, 8vw, 72px)/1 var(--head); color: var(--rust); }
.stat p { font-size: 19px; max-width: 40ch; }

.steps { counter-reset: s; }
.steps .card h3::before { counter-increment: s; content: counter(s); display: block; font: 800 40px/1 var(--head); margin-bottom: 8px; }
.steps .top-green h3::before { color: var(--green); }
.steps .top-blue h3::before { color: var(--blue); }
.steps .top-rust h3::before { color: var(--rust); }

.access .card .price { font: 800 20px var(--head); color: var(--green-text); margin-top: 6px; }

.two { display: grid; gap: 32px; }
@media (min-width: 860px) { .two { grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; } }

.dark { background: var(--ink); color: #F7F5EF; }
.dark .eyebrow { color: var(--yellow); }
.dark h2 { color: #F7F5EF; }
.dark .src { color: #BDB8AC; }
.dark .intro { color: #E9E6DD; }
.benefit { background: var(--yellow); color: var(--ink); border-radius: 18px; padding: 28px; font: 800 clamp(22px, 3vw, 30px)/1.2 var(--head); }
.benefit small { display: block; font: 700 13px var(--body); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 12px; }
.list { display: grid; gap: 16px; margin-top: 28px; }
.list b { color: var(--yellow); }

/* waitlist */
.join { background: var(--card); border-top: 1px solid var(--line); }
form { display: grid; gap: 16px; margin-top: 28px; max-width: 560px; }
label { font-weight: 700; display: grid; gap: 6px; }
label span.opt { font-weight: 400; color: var(--ink-soft); }
input, select, textarea { font: 18px var(--body); padding: 12px 14px; border: 2px solid #CFCABF; border-radius: 12px; background: #fff; color: var(--ink); width: 100%; }
textarea { min-height: 90px; resize: vertical; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.check input { width: 22px; height: 22px; margin-top: 3px; flex: none; }
.hp { position: absolute; left: -9999px; }
.msg { font-weight: 700; padding: 14px 16px; border-radius: 12px; display: none; }
.msg.ok { display: block; background: #E3F3EA; color: var(--green-text); }
.msg.err { display: block; background: #FBEBDD; color: #7A2E08; }

footer { background: var(--ink); color: #BDB8AC; font-size: 14px; padding: 36px 0; }
footer p + p { margin-top: 10px; }
footer a { color: #E9E6DD; }
@media (max-width: 520px) {
  section { padding: 56px 0; }
  .bar .btn { padding: 9px 14px; font-size: 15px; }
  .bar nav { gap: 12px; }
  .bar nav a.plain { font-size: 15px; }
}

/* the sample picture card: four look-alikes on a 2x2 grid */
.phone .ph-q u { text-decoration-thickness: 2px; text-underline-offset: 3px; }
.phone .ph-grid { display: grid; grid-template-columns: 52px 1fr 1fr; gap: 6px; align-items: stretch; }
.phone .ph-h { font-size: 12px; font-weight: 700; text-align: center; color: var(--ink-soft); }
.phone .ph-r { font-size: 12px; font-weight: 700; color: var(--ink-soft); align-self: center; text-align: center; line-height: 1.3; }
.phone .ph-cell { border-radius: 12px; padding: 9px 9px 10px; font-size: 12.5px; line-height: 1.35; color: #fff; }
.phone .ph-cell b { display: block; font-size: 13.5px; margin-bottom: 4px; }
.phone .c-green { background: var(--green); }
.phone .c-rust { background: var(--rust); }
.phone .c-blue { background: var(--blue); }
.phone .c-ink { background: var(--ink); }
.phone .ph-cell .beh { display: block; }
.phone .ph-cell .con { display: block; margin-top: 6px; padding: 3px 7px; border-radius: 8px; background: rgba(255,255,255,.2); font-weight: 700; width: fit-content; }
.phone .ph-cell .arr { display: block; text-align: center; font-size: 17px; font-weight: 700; line-height: 1; margin: 5px 0; }
.phone .ph-cell .con { margin-top: 0; }
.phone .ph-cell .eff { display: block; font-weight: 700; }

/* Clearer gap between headings and text (Anil, 2026-11-11: "same font and look, hard to read").
   Headings: bigger and full black. Text: smaller, softer grey, more line space. */
h3 { font-size: 24px; line-height: 1.15; }
.card p { font-size: 17px; line-height: 1.6; margin-top: 10px; color: #5A564D; }
.intro { font-size: 19px; line-height: 1.65; color: #5A564D; }
.dark .intro { color: #D9D5CA; }
h2 + .intro { margin-top: 20px; }
/* A line under each term, so the name stands apart from its steps (Anil, 2026-11-11). */
.phone .ph-cell b { padding-bottom: 6px; margin-bottom: 6px; border-bottom: 1.5px solid rgba(255,255,255,.55); }
.classes { margin-top: 22px; font-size: 18px; }
.classes b { color: var(--green-text); }
.cta-row { margin-top: 22px; display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.cta-row span { color: var(--ink-soft); font-size: 16px; }

/* "Pick your class": one sample card per class (cards.json, cards.js) */
.pick { color: #F7F5EF; font-weight: 700; font-size: 16px; max-width: 360px; margin: 0 auto 14px; }
.pick select { margin-top: 6px; font-weight: 700; }
.phone-note a { color: var(--yellow); font-weight: 700; }
.phone .ph-mix { margin-top: 14px; padding-top: 10px; border-top: 1px solid var(--line); font-size: 14px; color: var(--ink-soft); }
.phone .ph-mix b { color: var(--ink); }
.phone .ph-chain .ph-step { background: #fff; border: 1.5px solid var(--line); border-radius: 12px; padding: 9px 12px; font-size: 15px; line-height: 1.4; }
.phone .ph-chain .ph-step.end { border-color: var(--green); background: #E3F3EA; font-weight: 700; }
.phone .ph-ar { text-align: center; font-weight: 800; font-size: 18px; line-height: 1; margin: 4px 0; }
.phone .ph-cols { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 6px; }
.phone .ph-col { color: #fff; font-weight: 800; font-size: 14px; text-align: center; border-radius: 10px; padding: 7px 4px; }
.phone .ph-rl { font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); margin: 10px 0 4px; }
.phone .ph-v { background: #fff; border: 1.5px solid var(--line); border-radius: 10px; padding: 7px 8px; font-size: 13.5px; line-height: 1.35; }
.phone .ph-cmp.n3 .ph-v { font-size: 12.5px; padding: 6px; }
.phone .ph-pred .ph-opt { display: block; width: 100%; text-align: left; font: 15px var(--body); cursor: pointer; color: var(--ink); }
.phone .ph-pred .ph-opt.right { border-color: var(--green); background: #E3F3EA; }
.phone .ph-pred .ph-opt.notyet { border-color: var(--rust); }
.phone .ph-why b { display: block; margin-top: 12px; }
.phone .ph-why p { font-size: 14.5px; line-height: 1.45; margin-top: 4px; }
.phone .ph-cell .bef { display: block; opacity: .85; font-style: italic; }
.phone .ph-rule { font-size: 14px; font-weight: 700; margin: -6px 0 12px; }

/* ---- Sample cards, round 2 (student testers and a mobile UX review, 2026-11-11) ---- */
.pick-title { color: #F7F5EF; font-weight: 700; font-size: 16px; max-width: 360px; margin: 0 auto 10px; }
.chips { display: flex; gap: 8px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 2px 2px 12px; margin: 0 auto 6px; max-width: 360px;
         scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: none; scroll-snap-align: start; min-height: 44px; padding: 8px 14px; border-radius: 999px; border: 2px solid #4A4740;
        background: transparent; color: #F7F5EF; font: 700 15px var(--body); cursor: pointer; display: inline-flex; align-items: center; gap: 6px; }
.chip[aria-selected="true"] { background: var(--yellow); border-color: var(--yellow); color: var(--ink); }
.chip .live { font-size: 11px; letter-spacing: .06em; text-transform: uppercase; background: var(--green); color: #fff; border-radius: 999px; padding: 2px 7px; }
.phone .ph-tag { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); }

/* the deciding question is the hero; highlighter, not underline (underlines read as links) */
.phone .ph-q { font: 700 20px/1.3 var(--head); margin: 8px 0 14px; }
.phone mark.hl, .phone .ph-q u { background: linear-gradient(transparent 55%, rgba(255, 214, 0, .6) 55%); color: inherit; text-decoration: none; }
.phone .ph-label { color: #3A3833; }

/* guess first */
.phone .ph-try { background: #fff; border: 1.5px solid var(--line); border-radius: 14px; padding: 12px; }
.phone .ph-prompt { font-size: 16px; line-height: 1.45; }
.phone .ph-tap { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--green-text); margin: 8px 0 2px; }
.phone .ph-opts.two { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.phone .ph-opts.two .ph-opt { margin-top: 6px; }
.phone .ph-opt { display: flex; align-items: center; gap: 10px; width: 100%; min-height: 48px; text-align: left; font: 15px/1.3 var(--body);
                 color: var(--ink); background: #fff; border: 2px solid var(--line); border-radius: 12px; padding: 8px 12px; margin-top: 8px; cursor: pointer; }
.phone .ph-opt .dot { flex: none; width: 18px; height: 18px; border-radius: 50%; border: 2px solid #8A857A; }
.phone .ph-opt.right { border-color: var(--green); background: #E3F3EA; }
.phone .ph-opt.right .dot { background: var(--green); border-color: var(--green); }
.phone .ph-opt.notyet { border-color: var(--rust); }
.phone .ph-opt.notyet .dot { background: var(--rust); border-color: var(--rust); }
.phone .ph-opt.dim { opacity: .5; }
.phone .ph-opt:disabled { cursor: default; }
.phone .ph-fb { margin-top: 10px; font-size: 15px; line-height: 1.4; }
.phone .ph-skip { margin-top: 10px; background: none; border: 0; padding: 6px 0; font: 700 14px var(--body); color: var(--ink-soft); text-decoration: underline; cursor: pointer; }
.phone .ph-rest { display: none; margin-top: 14px; }
.phone .ph-rest.open { display: block; animation: ph-in .28s ease-out; }
@keyframes ph-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .phone .ph-rest.open { animation: none; } }

/* compare: one panel per row, colour bar per side, key rows tinted, extra rows behind "See more" */
.phone .ph-cmp .ph-vals { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 1px; background: var(--line);
                          border-radius: 12px; overflow: hidden; }
.phone .ph-cmp .ph-head { background: none; gap: 6px; border-radius: 0; }
.phone .ph-row { margin-top: 10px; }
.phone .ph-row .ph-rl { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: #3A3833; margin: 0 0 4px; }
.phone .ph-row .ph-v { background: #fff; border: 0; border-radius: 0; padding: 9px 10px; font-size: 15px; line-height: 1.4; border-top: 4px solid transparent; }
.phone .ph-row .ph-v.c-green { border-top-color: var(--green); background: #fff; color: var(--ink); }
.phone .ph-row .ph-v.c-blue { border-top-color: var(--blue); background: #fff; color: var(--ink); }
.phone .ph-row.key .ph-v { background: #FFF9D6; }
.phone .ph-both .ph-v { border-radius: 12px; border-top: 0; background: #fff; }
.phone .ph-more { margin-top: 10px; }
.phone .ph-more summary { cursor: pointer; font-weight: 700; font-size: 14px; color: var(--green-text); min-height: 44px; display: flex; align-items: center; }
.phone .ph-col { min-height: 36px; display: flex; align-items: center; justify-content: center; }

/* stack (three look-alikes) */
.phone .ph-item { background: #fff; border: 1.5px solid var(--line); border-radius: 12px; padding: 10px; margin-top: 8px; }
.phone .ph-item .ph-col { display: inline-flex; padding: 4px 12px; min-height: 0; }
.phone .ph-gap { font-size: 15px; line-height: 1.4; margin-top: 6px; }
.phone .ph-ex { font-size: 14px; color: var(--ink-soft); margin-top: 4px; }
.phone .ph-explain p { font-size: 15.5px; line-height: 1.5; margin-top: 8px; }

/* figures */
.phone .ph-fig { margin-top: 10px; background: #fff; border: 1.5px solid var(--line); border-radius: 12px; padding: 10px; }
.phone .ph-fig svg { display: block; width: 100%; height: auto; }
.phone .ph-bars { display: flex; justify-content: space-between; align-items: flex-end; height: 128px; gap: 4px; }
.phone .ph-bcol { flex: 1; display: flex; flex-direction: column; align-items: center; }
.phone .ph-bpair { display: flex; align-items: flex-end; gap: 3px; height: 104px; }
.phone .ph-bar { width: 18px; border-radius: 5px 5px 0 0; color: #fff; font-size: 11px; font-weight: 700; text-align: center; }
.phone .ph-bar span { position: relative; top: -16px; color: var(--ink); }
.phone .ph-bar.c-green { background: var(--green); }
.phone .ph-bar.c-blue { background: var(--blue); }
.phone .ph-bcol.behind .ph-blab { color: var(--rust); font-weight: 800; }
.phone .ph-blab { font-size: 12px; color: var(--ink-soft); margin-top: 4px; }
.phone .ph-fnote { font-size: 14px; margin-top: 8px; }

/* the mix-up line matters: darker and larger */
.phone .ph-mix { font-size: 15px; color: #333; }

/* the waitlist call under the card is a real button */
.phone-note { max-width: 360px; margin: 14px auto 0; text-align: left; }
.btn-wide { display: block; text-align: center; margin-top: 10px; min-height: 48px; }

/* On a phone, drop the phone-in-a-phone frame: it costs width and adds a second border. */
@media (max-width: 480px) {
  .phone { border: 0; border-radius: 18px; box-shadow: none; }
}
.phone-note a.btn { color: var(--ink); text-decoration: none; }
/* round 2 UX review */
.phone .ph-cmp .ph-head .ph-col { background: transparent; border-radius: 0; min-height: 0; padding: 4px 0; font-size: 14px; border-bottom: 3px solid; }
.phone .ph-cmp .ph-head .ph-col.c-green { color: var(--green-text); }
.phone .ph-cmp .ph-head .ph-col.c-blue { color: var(--blue); }
.phone mark.hl { padding: 0 .1em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.phone .ph-more { border-top: 1px dashed var(--line); padding-top: 4px; }
.phone .ph-ic { display: inline-block; width: 26px; font-size: 17px; }
.phone .ph-explain .ph-fig { margin: 4px 0 6px; }
/* round 2 testers: green meant "right answer" and also "left column". Answers now use charcoal and a tag, never a column colour. */
.phone .ph-opt.right { border-color: var(--ink); border-width: 2.5px; background: #fff; }
.phone .ph-opt.right .dot { background: var(--ink); border-color: var(--ink); }
.phone .ph-opt.notyet { border-color: #8A857A; border-style: dashed; }
.phone .ph-opt.notyet .dot { background: #8A857A; border-color: #8A857A; }
.phone .ph-opt .tag { margin-left: auto; font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); white-space: nowrap; }
.phone .ph-opt.right .tag { color: var(--ink); }
.phone .ph-opts.two .ph-opt { flex-wrap: wrap; }
.phone .ph-more summary { display: inline-flex; border: 1.5px solid var(--line); border-radius: 999px; padding: 6px 14px; min-height: 40px; background: #fff; }
.phone .ph-opt .ot { flex: 1 1 0; min-width: 0; }
.phone .ph-opts.two .ph-opt .tag { flex-basis: 100%; text-align: right; margin-top: 2px; }

/* ---- Round 3 cards: an activity per subject (docs/09-card-research.md) ---- */
.phone .ph-count { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); margin-top: 6px; }
.phone .ph-prompt { font-size: 16px; line-height: 1.45; margin-top: 6px; }
.phone .ph-big { font: 800 22px/1.25 var(--head); margin-top: 6px; }
.phone .ph-hint { font-size: 14px; color: var(--rust); min-height: 1.2em; margin-top: 6px; }
.phone .ph-cap { font-size: 14px; line-height: 1.45; color: #3A3833; margin-top: 8px; }
.phone .ph-step-t { font-weight: 800; font-size: 15px; margin-top: 14px; }
.phone .ph-next { display: inline-flex; align-items: center; min-height: 44px; margin-top: 12px; padding: 8px 18px; border-radius: 999px;
                  border: 0; background: var(--ink); color: #fff; font: 700 15px var(--body); cursor: pointer; }
.phone .ph-next.ghost { background: #fff; color: var(--ink); border: 2px solid var(--ink); margin-right: 8px; }
.phone .ph-ctrls { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.phone .ph-ctrls .ph-next { margin-right: 0; }
.phone .ph-sure { margin-top: 10px; }
.phone .chip-s { min-height: 40px; margin: 6px 6px 0 0; padding: 6px 14px; border-radius: 999px; border: 2px solid var(--line); background: #fff;
                 font: 700 14px var(--body); color: var(--ink); cursor: pointer; }

/* psych: the 2x2 that fills in */
.phone .ph-g2 { display: grid; grid-template-columns: 60px 1fr 1fr; gap: 6px; margin-top: 16px; }
.phone .ph-g2 .ph-h, .phone .ph-g2 .ph-r { font-size: 12px; font-weight: 700; color: var(--ink-soft); text-align: center; align-self: center; }
.phone .ph-slot { min-height: 52px; border-radius: 10px; border: 2px dashed var(--line); display: flex; align-items: center; justify-content: center;
                  text-align: center; font-size: 13px; font-weight: 700; color: #8A857A; padding: 6px; }
.phone .ph-slot.on { border: 0; color: #fff; }
.phone .ph-slot.c-green { background: var(--green); } .phone .ph-slot.c-rust { background: var(--rust); }
.phone .ph-slot.c-blue { background: var(--blue); } .phone .ph-slot.c-ink { background: var(--ink); }

/* world: build the chain */
.phone .ph-pool { display: grid; gap: 8px; margin-top: 10px; }
.phone .ph-tile { text-align: left; min-height: 44px; padding: 9px 12px; border-radius: 12px; border: 2px solid var(--line); background: #fff;
                  font: 15px/1.35 var(--body); color: var(--ink); cursor: pointer; }
.phone .ph-tile.struck { text-decoration: line-through; opacity: .5; }
.phone .ph-tile.shake { animation: ph-shake .35s; border-color: var(--rust); }
@keyframes ph-shake { 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }
.phone .ph-chain { margin-top: 8px; }
.phone .ph-source { background: #fff; border-left: 4px solid var(--ink); border-radius: 0 12px 12px 0; padding: 10px 12px; margin-top: 12px; }
.phone .ph-source .q { font-size: 16px; line-height: 1.45; font-style: italic; }
.phone .ph-source .n { font-size: 12px; color: var(--ink-soft); margin-top: 6px; }
.phone .ph-phrase { display: inline; text-align: left; background: none; border: 0; padding: 2px 0; font: italic 16px/1.5 var(--body); color: var(--ink); cursor: pointer; }
.phone .ph-phrase:not(:disabled) { text-decoration: underline dotted 2px; text-underline-offset: 4px; }
.phone .ph-phrase.hit { background: linear-gradient(transparent 55%, rgba(255, 214, 0, .6) 55%); text-decoration: none; }
.phone .ph-phrase.miss { color: #8A857A; text-decoration: line-through; }

/* bio: cells */
.phone .ph-cells { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; align-items: flex-start; }
.phone .ph-cellbox { width: 70px; text-align: center; font-size: 11px; color: var(--ink-soft); }
.phone .ph-cellbox svg { width: 70px; height: 70px; display: block; }
.phone .ph-cells .ph-cap { flex-basis: 100%; margin-top: 0; }

/* chem: moving the electron, two atoms sliding together */
.phone .ph-e { transition: transform .45s ease-in-out; }
.phone .ph-slide { transition: transform .45s ease-in-out; }
.phone .ph-slide.l.in { transform: translateX(22px); }
.phone .ph-slide.r.in { transform: translateX(-22px); }

/* physics: the track */
.phone .ph-track { position: relative; height: 64px; border-radius: 12px; overflow: hidden; margin-top: 8px; }
.phone .ph-track.s0 { background: repeating-linear-gradient(45deg, #C9B79C 0 6px, #BCA88B 6px 12px); }
.phone .ph-track.s1 { background: linear-gradient(#E6F2FA, #CFE6F5); }
.phone .ph-track.s2 { background: #F4F8FB; border: 1.5px dashed #9CB8CC; }
.phone .ph-surface { position: absolute; right: 8px; top: 6px; font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: #3A3833; }
.phone .ph-puck { position: absolute; left: 10px; bottom: 12px; width: 30px; height: 18px; border-radius: 50%; background: var(--ink); box-shadow: 0 3px 0 #000; }

/* alg2: the days */
.phone .ph-days { background: #fff; border: 1.5px solid var(--line); border-radius: 12px; padding: 6px 10px; margin-top: 10px; font-variant-numeric: tabular-nums; }
.phone .ph-dayrow { display: grid; grid-template-columns: 44px 1fr 1fr; gap: 6px; padding: 5px 0; font-size: 15px; border-top: 1px solid var(--line); }
.phone .ph-dayrow.head { border-top: 0; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.phone .ph-dayrow.head .c-green { color: var(--green-text); } .phone .ph-dayrow.head .c-blue { color: var(--blue); }
.phone .ph-dayrow.pass { background: #FFF9D6; font-weight: 800; }
.phone .ph-reveal { min-height: 44px; padding: 8px 12px; border-radius: 12px; border: 2px solid; background: #fff; font: 700 14px var(--body); text-align: left; cursor: pointer; width: 100%; }
.phone .ph-reveal.c-green { border-color: var(--green); color: var(--green-text); }
.phone .ph-reveal.c-blue { border-color: var(--blue); color: var(--blue); }
.phone .ph-reveal:disabled { color: var(--ink); cursor: default; }

/* spanish: pictures */
.phone .ph-pics { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 6px; }
.phone .ph-pic { min-height: 104px; border-radius: 14px; border: 2px solid var(--line); background: #fff; cursor: pointer; display: flex; flex-direction: column;
                 align-items: center; justify-content: center; gap: 6px; font: 15px var(--body); color: var(--ink); padding: 8px; }
.phone .ph-pic .e { font-size: 40px; line-height: 1; }
.phone .ph-pic.right { border-color: var(--ink); border-width: 2.5px; }
.phone .ph-pic.notyet { border-color: #8A857A; border-style: dashed; }

/* the end of every card */
.phone .ph-end { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); animation: ph-in .28s ease-out; }
.phone .ph-rulebox { background: var(--ink); color: #fff; border-radius: 14px; padding: 12px 14px; }
.phone .ph-rulebox b { display: block; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--yellow); margin-bottom: 4px; }
.phone .ph-rulebox p { font-size: 15.5px; line-height: 1.45; }
.phone .ph-result { margin-top: 10px; font-weight: 700; font-size: 15px; }
.phone .ph-again { margin-top: 14px; }
.phone .ph-sum { margin-top: 8px; }
.phone .ph-q.small { font-size: 16px; }
.phone .ph-ex2 { font-size: 15px; line-height: 1.5; margin-top: 8px; }
@media (prefers-reduced-motion: reduce) { .phone .ph-e, .phone .ph-slide, .phone .ph-end, .phone .ph-tile.shake { transition: none; animation: none; } }
.phone .ph-next.ghost.tried { background: #F0EDE5; }
.phone .ph-next.ghost.tried::after { content: " ✓"; }
.hero-grid > div { min-width: 0; }
.chips, .pick-title, .phone-note { max-width: min(360px, 100%); }
.phone .ph-dayrow.head .ta { color: var(--green-text); } .phone .ph-dayrow.head .tb { color: var(--blue); }
.phone .ph-daymsg { font-size: 15px; font-weight: 700; min-height: 1.2em; margin-top: 8px; }
/* round 5 design review */
.phone .ph-tile.struck { text-decoration: none; opacity: .55; border-style: dashed; }
.phone .ph-tile.struck::after { content: "  · not part of it"; font-size: 12px; font-weight: 700; color: var(--ink-soft); }
.phone .ph-phrase.miss { text-decoration: none; color: #8A857A; }
.phone .ph-next.ghost.tried::after { content: "\00a0✓"; }
.phone .ph-ghost { position: absolute; bottom: 4px; transform: translateX(-2px); font-size: 10px; font-weight: 700; color: #3A3833; padding-top: 22px;
                   background: radial-gradient(ellipse 15px 9px at 15px 9px, rgba(26,26,26,.35) 98%, transparent 100%) no-repeat; white-space: nowrap; }
.phone .ph-ghost.old { opacity: .55; }
.phone .ph-track { height: 76px; }
.phone .ph-dayrow { font-family: var(--head); font-weight: 600; }
.phone .ph-dayrow.gap { display: block; text-align: center; color: var(--ink-soft); }
.phone .ph-cellbox { width: 84px; }
.phone .ph-cellbox svg { width: 84px; height: 84px; }
.phone .ph-opt.picked { border-color: var(--ink); border-style: dashed; }
.phone .ph-opt.picked .dot { background: #8A857A; border-color: #8A857A; }
.phone .ph-log p { font-size: 13.5px; color: var(--ink-soft); margin-top: 4px; }
.phone .ph-log p b { color: var(--ink); }
.phone .ph-cells.n4 { gap: 4px; }
.phone .ph-cells.n4 .ph-cellbox { width: calc(25% - 3px); }
.phone .ph-cells.n4 .ph-cellbox svg { width: 100%; height: auto; }