/* Child Phenoms — white paper, bold ink, pop color. See DESIGN.md. */
@import url('https://fonts.googleapis.com/css2?family=Unbounded:wght@500;600;700;800&family=Inter:wght@400;500;600;700;800&family=Caveat:wght@500;600;700&display=swap');

:root {
  --ink: #121826; --ink-2: #4b5567; --ink-3: #8a93a6;
  --hair: #e6e8ee; --hair-2: #d4d8e2;
  --paper: #ffffff; --paper-2: #f7f8fb;
  --blue: #2457f5; --blue-ink: #1a43c4; --blue-soft: #e8eeff;
  --red: #f03e3e; --red-soft: #ffe9e9;
  --yellow: #ffd23f; --yellow-soft: #fff6d6;
  --green: #22c55e; --green-ink: #16a34a; --green-soft: #e4f8ec;
  --purple: #7c5cff; --purple-soft: #eeeaff;
  --orange: #ff8a1f; --orange-soft: #fff0e1;
  --pink: #ff4fa3; --pink-soft: #ffe7f2;
  --teal: #0fb5c9; --teal-soft: #e0f7fa;
  --font-display: 'Unbounded', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-hand: 'Caveat', 'Patrick Hand', cursive;
  --r: 16px; --r-lg: 28px; --r-pill: 999px;
  --shadow-hard: 4px 4px 0 var(--ink);
  --shadow-soft: 0 1px 2px rgba(18,24,38,.06), 0 12px 32px -16px rgba(18,24,38,.22);
  --wrap: 1120px; --measure: 820px;
  --gap: 96px;
}
@media (max-width: 720px) { :root { --gap: 56px; } }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px; line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  /* faint looseleaf: a dot grid with a ruled line every four dots */
  background-image:
    radial-gradient(circle, rgba(18,24,38,.10) 1px, transparent 1.3px),
    repeating-linear-gradient(to bottom, transparent 0 95px, rgba(36,87,245,.06) 95px 96px);
  background-size: 24px 24px, 100% 96px;
  background-position: 12px 12px, 0 0;
}
@media (min-width: 1000px) {
  body::before { content: ''; position: fixed; left: 72px; top: 0; bottom: 0; width: 1px; background: rgba(240,62,62,.07); pointer-events: none; }
}
::selection { background: var(--yellow); color: var(--ink); }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--ink); margin: 0 0 .4em; line-height: 1.1; }
h1 { font-size: 40px; font-weight: 700; letter-spacing: -.025em; line-height: 1.08; }
h2 { font-size: 30px; font-weight: 700; letter-spacing: -.02em; line-height: 1.12; }
h3 { font-size: 20px; font-weight: 600; letter-spacing: -.01em; line-height: 1.25; }
h4 { font-size: 16px; font-weight: 600; }
@media (max-width: 720px) { h1 { font-size: 30px; } h2 { font-size: 24px; } h3 { font-size: 18px; } }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.3em; margin: 0 0 1em; }
li { margin: .3em 0; }
b, strong { font-weight: 700; }
small, .small { font-size: 14.5px; }
.muted { color: var(--ink-2); }
.faint { color: var(--ink-3); }
.center { text-align: center; }
.lede { font-size: 19px; color: var(--ink-2); max-width: 640px; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 10px; display: block; }
.eyebrow.blue { color: var(--blue); } .eyebrow.red { color: var(--red); } .eyebrow.green { color: var(--green-ink); } .eyebrow.purple { color: var(--purple); } .eyebrow.orange { color: var(--orange); }
.hand { font-family: var(--font-hand); font-weight: 600; font-size: 22px; line-height: 1.2; }
.num { font-family: var(--font-display); font-weight: 700; letter-spacing: -.02em; }
.hi { background: linear-gradient(transparent 58%, var(--yellow) 58%, var(--yellow) 94%, transparent 94%); padding: 0 .08em; }
.hi-blue { background: linear-gradient(transparent 58%, var(--blue-soft) 58%, var(--blue-soft) 94%, transparent 94%); padding: 0 .08em; }
.c-red { color: var(--red); } .c-orange { color: var(--orange); } .c-green { color: var(--green-ink); } .c-teal { color: var(--teal); } .c-blue { color: var(--blue); } .c-purple { color: var(--purple); } .c-pink { color: var(--pink); } .c-yellow { color: #c99a00; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ───────── shell ───────── */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px 96px; }
@media (max-width: 720px) { .wrap { padding: 0 16px 72px; } }
.measure { max-width: var(--measure); }

.topbar { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.86); backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--hair); }
.topbar-in { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; gap: 18px; }
@media (max-width: 720px) { .topbar-in { padding: 0 16px; height: 58px; } }
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none !important; flex: none; }
.logo svg { width: 34px; height: 34px; }
.logo .word { font-family: var(--font-display); font-weight: 700; font-size: 17px; letter-spacing: -.02em; white-space: nowrap; }
.logo .word b { color: var(--blue); font-weight: 800; }
.nav { display: flex; gap: 2px; margin-left: auto; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.nav::-webkit-scrollbar { display: none; }
.nav a { font-size: 14.5px; font-weight: 500; color: var(--ink-2); padding: 8px 12px; border-radius: var(--r-pill); white-space: nowrap; }
.nav a:hover { color: var(--ink); background: var(--paper-2); text-decoration: none; }
.nav a.active { color: var(--ink); background: var(--yellow-soft); }
.topbar .cta { flex: none; }
@media (max-width: 720px) { .topbar .word { display: none; } .topbar .cta .btn { padding: 8px 14px; font-size: 14px; } .nav { mask-image: linear-gradient(to right, #000 82%, transparent); -webkit-mask-image: linear-gradient(to right, #000 82%, transparent); padding-right: 28px; } }

.footer { border-top: 1px solid var(--hair); margin-top: var(--gap); padding: 28px 0 0; color: var(--ink-3); font-size: 14px; display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; }
.footer .logo .word { font-size: 14px; }
.footer a { color: var(--ink-2); }

/* ───────── sections ───────── */
section { margin: 0; }
.section { margin-top: var(--gap); }
.section-head { max-width: 640px; margin-bottom: 36px; }
.section-head h2 { margin-bottom: 10px; }
.section-head p { margin: 0; color: var(--ink-2); font-size: 17px; }
.rule { border: 0; border-top: 1px solid var(--hair); margin: 0; }

/* hero */
.hero { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; padding-top: 48px; }
.hero h1 { font-size: 56px; font-weight: 800; letter-spacing: -.03em; line-height: 1.02; margin-bottom: 20px; }
.hero .lede { font-size: 19px; margin-bottom: 26px; }
.hero-art { position: relative; display: grid; place-items: center; }
.hero-art img { width: 100%; max-width: 440px; position: relative; z-index: 1; }
.hero-art::before { content: ''; position: absolute; inset: 8% 6%; border-radius: 50%; background: radial-gradient(circle, rgba(18,24,38,.14) 1.4px, transparent 1.8px) 0 0 / 12px 12px, var(--blue-soft); mask: radial-gradient(circle at 50% 50%, #000 55%, transparent 72%); -webkit-mask: radial-gradient(circle at 50% 50%, #000 55%, transparent 72%); }
.hero-art .burst { position: absolute; z-index: 2; left: 0; bottom: 4%; width: 124px; transform: rotate(-8deg); filter: drop-shadow(3px 3px 0 #121826); }
@media (max-width: 920px) { .hero { grid-template-columns: 1fr; gap: 24px; padding-top: 28px; } .hero h1 { font-size: 40px; } .hero-art img { max-width: 320px; } .hero-art .burst { width: 96px; left: 4%; } }
@media (max-width: 480px) { .hero h1 { font-size: 34px; } }

/* trust strip */
.strip { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 40px; padding: 18px 0; border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); font-size: 14.5px; color: var(--ink-2); font-weight: 500; }
.strip span::before { content: ''; display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); margin-right: 9px; vertical-align: 1px; }
.strip span:nth-child(2)::before { background: var(--red); } .strip span:nth-child(3)::before { background: var(--yellow); } .strip span:nth-child(4)::before { background: var(--green); }

/* three-up columns with hairlines */
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.cols > div { padding: 8px 28px 8px 0; border-right: 1px solid var(--hair); }
.cols > div + div { padding-left: 28px; }
.cols > div:last-child { border-right: 0; padding-right: 0; }
.cols .ic { width: 52px; height: 52px; margin-bottom: 14px; }
.cols h3 { margin-bottom: 6px; }
.cols p { color: var(--ink-2); margin: 0; }
@media (max-width: 820px) { .cols { grid-template-columns: 1fr; } .cols > div { border-right: 0; border-bottom: 1px solid var(--hair); padding: 20px 0 !important; } .cols > div:last-child { border-bottom: 0; } }

/* zig-zag rows */
.zig { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 36px 0; }
.zig + .zig { border-top: 1px solid var(--hair); }
.zig:nth-child(even) .zig-art { order: 2; }
.zig-art { display: grid; place-items: center; }
.zig-art img { max-width: 380px; width: 100%; }
.zig .n { font-family: var(--font-display); font-weight: 800; font-size: 14px; color: #fff; background: var(--ink); width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; margin-bottom: 14px; }
.zig h3 { font-size: 26px; margin-bottom: 10px; }
.zig p { color: var(--ink-2); }
@media (max-width: 920px) { .zig { grid-template-columns: 1fr; gap: 16px; padding: 28px 0; } .zig:nth-child(even) .zig-art { order: 0; } .zig-art img { max-width: 260px; } .zig h3 { font-size: 22px; } }

/* color blocks */
.block { position: relative; border-radius: var(--r-lg); padding: 48px; overflow: hidden; }
.block::after { content: ''; position: absolute; right: -40px; bottom: -40px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(18,24,38,.12) 1.6px, transparent 2px) 0 0 / 14px 14px; mask: radial-gradient(circle, #000 40%, transparent 70%); -webkit-mask: radial-gradient(circle, #000 40%, transparent 70%); pointer-events: none; }
.block > * { position: relative; z-index: 1; }
.block.yellow { background: var(--yellow-soft); } .block.blue { background: var(--blue-soft); } .block.green { background: var(--green-soft); } .block.red { background: var(--red-soft); } .block.purple { background: var(--purple-soft); } .block.orange { background: var(--orange-soft); } .block.ink { background: var(--ink); color: #fff; }
.block.ink h2, .block.ink h3 { color: #fff; } .block.ink .muted { color: rgba(255,255,255,.72); }
.block.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
.block.split img { max-width: 360px; width: 100%; margin: 0 auto; }
.block h2 { margin-bottom: 12px; }
.block .lede { margin-bottom: 18px; }
@media (max-width: 920px) { .block { padding: 32px 24px; } .block.split { grid-template-columns: 1fr; gap: 20px; } .block.split img { max-width: 240px; } }
@media (max-width: 720px) { .block { padding: 26px 20px; border-radius: 22px; } }

/* ───────── buttons ───────── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-family: var(--font-body); font-weight: 600; font-size: 15px; line-height: 1; padding: 13px 22px; border-radius: var(--r-pill); border: 2px solid var(--ink); background: var(--ink); color: #fff; cursor: pointer; text-decoration: none !important; user-select: none; white-space: nowrap; transition: transform 90ms, box-shadow 90ms, background 120ms; -webkit-tap-highlight-color: transparent; }
.btn:hover { transform: translate(-1px, -1px); box-shadow: var(--shadow-hard); }
.btn:active { transform: translate(1px, 1px); box-shadow: none; }
.btn.secondary, .btn.white { background: #fff; color: var(--ink); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-2); padding-left: 10px; padding-right: 10px; }
.btn.ghost:hover { box-shadow: none; transform: none; color: var(--ink); text-decoration: underline !important; text-underline-offset: 3px; }
.btn.blue { background: var(--blue); color: #fff; box-shadow: var(--shadow-hard); }
.btn.red { background: var(--red); color: #fff; box-shadow: var(--shadow-hard); }
.btn.green { background: var(--green); color: var(--ink); box-shadow: var(--shadow-hard); }
.btn.yellow { background: var(--yellow); color: var(--ink); box-shadow: var(--shadow-hard); }
.btn.purple { background: var(--purple); color: #fff; box-shadow: var(--shadow-hard); }
.btn.orange { background: var(--orange); color: var(--ink); box-shadow: var(--shadow-hard); }
.btn.blue:hover, .btn.red:hover, .btn.green:hover, .btn.yellow:hover, .btn.purple:hover, .btn.orange:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--ink); }
.btn.blue:active, .btn.red:active, .btn.green:active, .btn.yellow:active, .btn.purple:active, .btn.orange:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.btn.primary { background: var(--ink); color: #fff; }
.btn.sm { font-size: 14px; padding: 9px 16px; }
.btn.big { font-size: 17px; padding: 16px 28px; }
.btn[disabled] { opacity: .4; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 14px 0; }
@media (max-width: 480px) { .btn-row .btn.big { width: 100%; } }
.link-arrow { font-weight: 600; color: var(--ink); }
.link-arrow::after { content: ' →'; }

/* ───────── small bits ───────── */
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; padding: 4px 11px; border: 1.5px solid var(--hair-2); border-radius: var(--r-pill); background: #fff; color: var(--ink-2); margin: 2px; line-height: 1.3; }
.chip.direct { border-color: var(--green); color: var(--green-ink); background: var(--green-soft); }
.chip.small { border-color: var(--orange); color: #b85f00; background: var(--orange-soft); }
.chip.big { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); }
.chip.combo { border-color: var(--purple); color: var(--purple); background: var(--purple-soft); }
.chip.ink { border-color: var(--ink); color: var(--ink); }
.sticker { display: inline-block; position: absolute; top: -14px; right: 18px; transform: rotate(6deg); background: var(--yellow); color: var(--ink); font-family: var(--font-hand); font-weight: 700; font-size: 20px; line-height: 1; padding: 7px 14px; border-radius: 10px; border: 2px solid var(--ink); box-shadow: 3px 3px 0 var(--ink); z-index: 2; }
.badge-xp { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-hand); font-weight: 700; font-size: 19px; line-height: 1; padding: 6px 12px; border-radius: var(--r-pill); background: var(--yellow); border: 2px solid var(--ink); vertical-align: middle; }
.kbd { font-size: 12px; font-weight: 600; border: 1.5px solid var(--ink); border-bottom-width: 3px; border-radius: 6px; padding: 1px 7px; background: #fff; }

.bar { height: 10px; background: var(--paper-2); border: 1.5px solid var(--ink); border-radius: 10px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--blue); transition: width 300ms; }
.bar.orange > i { background: var(--orange); } .bar.green > i { background: var(--green); } .bar.yellow > i { background: var(--yellow); }

/* panel: the one card-like element, used in-app */
.card { background: #fff; border: 1.5px solid var(--hair); border-radius: 20px; padding: 22px 24px; margin: 14px 0; position: relative; }
.card.alt { border-color: var(--hair-2); }
.card.tint-teal, .card.tint-blue { border-color: var(--blue); background: var(--blue-soft); }
.card.tint-orange { border-color: var(--orange); background: var(--orange-soft); }
.card.tint-purple { border-color: var(--purple); background: var(--purple-soft); }
.card.tint-green { border-color: var(--green); background: var(--green-soft); }
.card.tint-red { border-color: var(--red); background: var(--red-soft); }
.card h2:first-child, .card h3:first-child { margin-top: 0; }
.card.ink-edge { border: 2px solid var(--ink); }
@media (max-width: 720px) { .card { padding: 18px 16px; border-radius: 16px; } }

/* coach tip: speech bubble */
.tip { display: grid; grid-template-columns: 56px 1fr; gap: 14px; align-items: start; margin: 18px 0; }
.tip img, .tip .ic { width: 56px; height: 56px; }
.tip .bubble { position: relative; background: #fff; border: 2px solid var(--ink); border-radius: 16px; padding: 10px 16px 9px; font-family: var(--font-hand); font-weight: 600; font-size: 21px; line-height: 1.25; color: var(--ink); }
.tip .bubble::before { content: ''; position: absolute; left: -12px; top: 18px; width: 18px; height: 18px; background: #fff; border-left: 2px solid var(--ink); border-bottom: 2px solid var(--ink); transform: rotate(45deg); border-radius: 0 0 0 4px; }
.tip .bubble b { font-weight: 700; }
.tip .bubble .who { display: block; font-family: var(--font-body); font-size: 11.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 2px; }
.tip.parent .bubble { background: var(--yellow-soft); } .tip.parent .bubble::before { background: var(--yellow-soft); }
.tip.science .bubble { background: var(--purple-soft); } .tip.science .bubble::before { background: var(--purple-soft); }
.tip.warn .bubble { background: var(--red-soft); } .tip.warn .bubble::before { background: var(--red-soft); }
.tip.game .bubble { background: var(--green-soft); } .tip.game .bubble::before { background: var(--green-soft); }
@media (max-width: 480px) { .tip { grid-template-columns: 44px 1fr; gap: 10px; } .tip img, .tip .ic { width: 44px; height: 44px; } .tip .bubble { font-size: 19px; } }

/* legacy .callout markup from the curriculum is upgraded to .tip bubbles in app.js (upgradeCallouts) */

/* ───────── stats ───────── */
.stat-row { display: flex; gap: 0; flex-wrap: wrap; border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); }
.stat { flex: 1 1 140px; padding: 18px 20px; border-right: 1px solid var(--hair); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-family: var(--font-display); font-weight: 700; font-size: 34px; letter-spacing: -.02em; line-height: 1; margin-bottom: 6px; }
.stat span { font-size: 13px; color: var(--ink-2); font-weight: 500; }
@media (max-width: 720px) { .stat { flex: 1 1 45%; padding: 14px 12px; } .stat:nth-child(2) { border-right: 0; } .stat b { font-size: 28px; } }
.bignum { font-family: var(--font-display); font-weight: 800; font-size: 64px; letter-spacing: -.03em; line-height: 1; }

/* ───────── trail (stage map) ───────── */
.trail { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 8px; }
.stage-node { position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; padding: 22px 12px 16px; border: 2px solid var(--ink); border-radius: 20px; background: #fff; color: var(--ink); text-decoration: none !important; transition: transform 120ms, box-shadow 120ms; }
.stage-node:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow-hard); }
.stage-node svg { width: 72px; height: 72px; }
.stage-node .name { font-family: var(--font-display); font-weight: 700; font-size: 15px; letter-spacing: -.01em; margin-top: 8px; }
.stage-node .sub { font-size: 12.5px; color: var(--ink-2); line-height: 1.3; margin-top: 2px; }
.stage-node .bar { width: 100%; margin-top: 10px; height: 8px; }
.stage-node.locked { border-color: var(--hair-2); color: var(--ink-3); }
.stage-node.locked svg { filter: grayscale(1); opacity: .45; }
.stage-node.locked .name { color: var(--ink-3); }
.stage-node.done { border-color: var(--green); }
.stage-node .num { position: absolute; top: -13px; left: -10px; width: 30px; height: 30px; border-radius: 50%; background: var(--yellow); border: 2px solid var(--ink); display: grid; place-items: center; font-family: var(--font-display); font-weight: 800; font-size: 13px; }
.stage-node.locked .num { background: var(--paper-2); border-color: var(--hair-2); color: var(--ink-3); }
.stage-node.current { border-width: 3px; box-shadow: var(--shadow-hard); }
.stage-node .check { position: absolute; top: -12px; right: -8px; width: 28px; height: 28px; border-radius: 50%; background: var(--green); border: 2px solid var(--ink); color: var(--ink); display: grid; place-items: center; font-weight: 800; font-size: 15px; }
@media (max-width: 920px) { .trail { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px) { .trail { grid-template-columns: repeat(2, 1fr); gap: 12px 14px; } .stage-node { padding: 18px 8px 12px; } .stage-node svg { width: 56px; height: 56px; } }

/* stage timeline on the plan page */
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li { display: grid; grid-template-columns: 64px 84px 1fr auto; gap: 20px; align-items: center; padding: 22px 0; border-top: 1px solid var(--hair); }
.timeline li:last-child { border-bottom: 1px solid var(--hair); }
.timeline .tn { font-family: var(--font-display); font-weight: 800; font-size: 34px; letter-spacing: -.03em; color: var(--ink); line-height: 1; }
.timeline svg { width: 76px; height: 76px; }
.timeline h3 { margin: 0 0 4px; font-size: 20px; }
.timeline h3 small { font-family: var(--font-body); font-weight: 600; font-size: 13px; color: var(--ink-3); margin-left: 8px; letter-spacing: .04em; text-transform: uppercase; }
.timeline p { margin: 0; color: var(--ink-2); }
.timeline .tt { font-size: 13px; font-weight: 600; color: var(--ink-2); background: var(--paper-2); border: 1.5px solid var(--hair); border-radius: var(--r-pill); padding: 6px 12px; white-space: nowrap; }
@media (max-width: 720px) { .timeline li { grid-template-columns: 44px 1fr; gap: 10px 14px; padding: 18px 0; } .timeline .tn { font-size: 24px; } .timeline svg { display: none; } .timeline .tt { grid-column: 2; justify-self: start; } }

/* step row (how a lesson goes) */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.steps > div { position: relative; padding-top: 6px; }
.steps .ic { width: 64px; height: 64px; margin-bottom: 12px; }
.steps h4 { font-family: var(--font-display); font-size: 16px; margin: 0 0 6px; }
.steps p { color: var(--ink-2); font-size: 15px; margin: 0; }
@media (max-width: 820px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } }

/* session bar (a day looks like this) */
.daybar { display: flex; border: 2px solid var(--ink); border-radius: 14px; overflow: hidden; height: 58px; margin: 18px 0 8px; }
.daybar > div { display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 14px; color: var(--ink); border-right: 2px solid var(--ink); text-align: center; line-height: 1.1; padding: 0 6px; }
.daybar > div:last-child { border-right: 0; }
.daybar .d1 { flex: 2; background: var(--green-soft); } .daybar .d2 { flex: 9; background: var(--blue-soft); } .daybar .d3 { flex: 5; background: var(--purple-soft); } .daybar .d4 { flex: 1; background: var(--yellow-soft); }
.daybar small { display: block; font-family: var(--font-body); font-weight: 500; font-size: 11.5px; color: var(--ink-2); }
@media (max-width: 560px) { .daybar { height: 68px; } .daybar > div { font-size: 12px; } }

/* ───────── lists: lessons, rungs ───────── */
.lesson-list { list-style: none; padding: 0; margin: 0; }
.lesson-list li { display: flex; align-items: center; gap: 14px; padding: 13px 4px; border-top: 1px solid var(--hair); }
.lesson-list li:last-child { border-bottom: 1px solid var(--hair); }
.lesson-list .ix { width: 36px; height: 36px; border-radius: 50%; border: 2px solid var(--ink); display: grid; place-items: center; font-family: var(--font-display); font-weight: 700; font-size: 14px; background: #fff; flex: none; }
.lesson-list li.done .ix { background: var(--green); border-color: var(--ink); }
.lesson-list li.next .ix { background: var(--yellow); }
.lesson-list a { color: var(--ink); font-weight: 600; }
.lesson-list .meta { font-size: 13px; color: var(--ink-3); margin-top: 1px; }
.lesson-list .go { margin-left: auto; }
@media (max-width: 480px) { .lesson-list .go { display: none; } }

.formula-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 8px; margin: 10px 0 16px; }
.formula { padding: 9px 12px; border: 1.5px solid var(--hair-2); border-radius: 12px; background: #fff; font-family: var(--font-display); font-weight: 600; font-size: 15px; text-align: center; letter-spacing: -.01em; }
.formula small { display: block; font-family: var(--font-body); font-weight: 500; font-size: 12px; color: var(--ink-3); margin-top: 2px; }
.formula.small { border-color: var(--orange); background: var(--orange-soft); } .formula.big { border-color: var(--blue); background: var(--blue-soft); } .formula.combo { border-color: var(--purple); background: var(--purple-soft); }

.table { width: 100%; border-collapse: collapse; font-size: 15px; }
.table th, .table td { text-align: left; padding: 10px 10px; border-bottom: 1px solid var(--hair); vertical-align: top; }
.table th { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
.table tr.me { background: var(--yellow-soft); }
.table-wrap { overflow-x: auto; }

details { margin: 6px 0; border-top: 1px solid var(--hair); }
details:last-of-type { border-bottom: 1px solid var(--hair); }
summary { cursor: pointer; font-weight: 600; padding: 12px 0; list-style: none; display: flex; align-items: center; gap: 10px; }
summary::-webkit-details-marker { display: none; }
summary::before { content: '+'; font-family: var(--font-display); font-weight: 700; width: 24px; height: 24px; border: 2px solid var(--ink); border-radius: 50%; display: grid; place-items: center; font-size: 14px; flex: none; }
details[open] summary::before { content: '–'; }
details p { color: var(--ink-2); margin: 0 0 14px 34px; }

/* ───────── forms ───────── */
input[type=text], input[type=number], input[type=email], select { font-family: var(--font-body); font-size: 16px; padding: 10px 14px; border: 2px solid var(--ink); border-radius: 12px; background: #fff; color: var(--ink); min-height: 44px; outline: none; }
input:focus, select:focus { box-shadow: 0 0 0 3px rgba(36,87,245,.35); }
label { font-size: 14px; font-weight: 600; color: var(--ink-2); display: inline-flex; align-items: center; gap: 8px; }
.profile-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.field label { font-size: 13px; letter-spacing: .06em; text-transform: uppercase; }
.field input { width: 100%; font-size: 18px; padding: 12px 16px; }
.field .help { font-size: 13px; color: var(--ink-3); }
.age-pick { display: flex; flex-wrap: wrap; gap: 8px; }
.age-pick button { font-family: var(--font-display); font-weight: 700; font-size: 15px; width: 48px; height: 44px; border-radius: 12px; border: 2px solid var(--ink); background: #fff; cursor: pointer; }
.age-pick button.on { background: var(--yellow); box-shadow: 3px 3px 0 var(--ink); }
.onboard { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding-top: 32px; }
.onboard form { border: 2px solid var(--ink); border-radius: 24px; padding: 28px; background: #fff; box-shadow: 8px 8px 0 var(--blue-soft); }
@media (max-width: 920px) { .onboard { grid-template-columns: 1fr; gap: 24px; } }
@media (max-width: 480px) { .onboard form { padding: 20px 16px; } }

/* ───────── abacus ───────── */
.abacus-wrap { display: flex; flex-direction: column; align-items: center; gap: 8px; margin: 10px 0; }
.abacus { width: 100%; max-width: 560px; height: auto; display: block; touch-action: manipulation; }
.abacus .bead path:first-child { transition: filter 150ms; }
.abacus .bead:hover path:first-child { filter: brightness(1.1); }
.abacus-value { font-family: var(--font-display); font-weight: 700; font-size: 30px; letter-spacing: -.02em; color: var(--ink); min-height: 1.2em; }
.abacus-caption { font-size: 15px; min-height: 1.6em; text-align: center; color: var(--ink); padding: 4px 14px; border-radius: 10px; }
.abacus-caption.big { font-family: var(--font-display); font-weight: 700; font-size: 24px; }
.abacus-caption.direct { background: var(--green-soft); } .abacus-caption.small { background: var(--orange-soft); } .abacus-caption.big { background: var(--blue-soft); } .abacus-caption.combo { background: var(--purple-soft); }
.col-hl { fill: rgba(255,210,63,.35); stroke: var(--orange); stroke-width: 2; stroke-dasharray: 6 4; }
.col-hl.direct { fill: rgba(34,197,94,.18); stroke: var(--green); } .col-hl.small { fill: rgba(255,138,31,.2); stroke: var(--orange); } .col-hl.big { fill: rgba(36,87,245,.16); stroke: var(--blue); } .col-hl.combo { fill: rgba(124,92,255,.18); stroke: var(--purple); }
.place-label { font-family: var(--font-body); font-size: 11px; font-weight: 600; fill: var(--ink-3); }
.abacus-sm .abacus { max-width: 380px; }
.demo-card { border: 1.5px solid var(--hair); border-radius: 18px; padding: 14px 16px 10px; margin: 14px 0; background: #fff; }
.demo-card .lbl { font-family: var(--font-hand); font-weight: 600; font-size: 21px; text-align: center; }
.try-box { border: 2px solid var(--ink); border-radius: 22px; padding: 16px 16px 12px; background: #fff; position: relative; }

/* ───────── drill ───────── */
.drill { text-align: center; }
.drill .hud { display: flex; justify-content: center; gap: 22px; flex-wrap: wrap; font-size: 13px; font-weight: 600; color: var(--ink-3); letter-spacing: .04em; text-transform: uppercase; }
.drill .hud b { color: var(--ink); font-family: var(--font-display); font-size: 18px; letter-spacing: -.01em; }
.drill .prompt { font-size: 16px; color: var(--ink-2); margin-top: 10px; min-height: 1.4em; }
.drill .problem { font-family: var(--font-display); font-weight: 700; font-size: 44px; letter-spacing: -.02em; line-height: 1.15; margin: 14px 0; color: var(--ink); }
.drill .problem.stack { display: inline-block; text-align: right; }
.drill .problem.stack div { padding: 0 8px; }
.drill .problem.stack div:last-child { border-top: 3px solid var(--ink); }
.drill input[type=number], .drill input[type=text] { font-family: var(--font-display); font-weight: 700; font-size: 32px; width: 220px; max-width: 80vw; text-align: center; padding: 8px 12px; border: 2px solid var(--ink); border-radius: 14px; background: #fff; }
.drill .answer-row { display: flex; gap: 10px; justify-content: center; align-items: center; flex-wrap: wrap; margin: 8px 0; }
.feedback { font-family: var(--font-hand); font-weight: 700; font-size: 26px; min-height: 1.6em; margin: 8px 0; }
.feedback.good { color: var(--green-ink); } .feedback.bad { color: var(--red); }
.timer { font-variant-numeric: tabular-nums; }
@media (max-width: 480px) { .drill .problem { font-size: 34px; } }

.flash-stage { height: 220px; display: grid; place-items: center; border: 2px solid var(--ink); border-radius: 22px; background: #fff; margin: 10px 0; }
.flash-stage .num { font-family: var(--font-display); font-weight: 800; font-size: 96px; letter-spacing: -.03em; color: var(--ink); }
.flash-stage .num.neg { color: var(--red); }
.flash-stage .ready { font-family: var(--font-hand); font-weight: 600; font-size: 30px; color: var(--ink-3); }
@media (max-width: 480px) { .flash-stage { height: 170px; } .flash-stage .num { font-size: 64px; } }

/* ───────── ranking chart ───────── */
.rank-chart { width: 100%; height: auto; }
.rank-chart text { font-family: var(--font-body); font-size: 12px; fill: var(--ink-3); }
.rank-chart .hand { font-family: var(--font-hand); font-weight: 600; font-size: 17px; fill: var(--ink); }

/* ───────── misc ───────── */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: #fff; font-family: var(--font-hand); font-weight: 600; font-size: 22px; padding: 10px 22px; border-radius: 14px; z-index: 50; animation: pop 200ms ease-out; box-shadow: var(--shadow-soft); white-space: nowrap; max-width: 92vw; overflow: hidden; text-overflow: ellipsis; }
@keyframes pop { from { transform: translateX(-50%) scale(.85); opacity: 0; } to { transform: translateX(-50%) scale(1); opacity: 1; } }
.confetti { position: fixed; inset: 0; pointer-events: none; z-index: 60; }
.crumbs { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: 13.5px; color: var(--ink-3); padding: 18px 0 8px; }
.crumbs a { color: var(--ink-2); font-weight: 500; }
.crumbs span::before { content: '/'; margin: 0 2px; color: var(--hair-2); }
.page-head { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 10px 0 20px; }
.page-head .art { width: 150px; height: 150px; }
@media (max-width: 720px) { .page-head { grid-template-columns: 1fr 84px; gap: 12px; align-items: start; } .page-head .art { width: 84px; height: 84px; margin-top: 10px; } }
.needs { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 14px; font-weight: 500; color: var(--ink-2); padding: 12px 0; border-top: 1px solid var(--hair); border-bottom: 1px solid var(--hair); margin: 4px 0 18px; }
.needs span { display: inline-flex; align-items: center; gap: 7px; }
.needs svg { width: 18px; height: 18px; }
.quest-list li { border-top: 1px solid var(--hair); }
.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { display: flex; gap: 12px; align-items: flex-start; padding: 10px 0; }
.checklist .box { width: 26px; height: 26px; border: 2px solid var(--ink); border-radius: 8px; flex: none; display: grid; place-items: center; font-weight: 800; background: #fff; margin-top: 2px; }
.checklist li.done .box { background: var(--green); }
.checklist li.done { color: var(--ink-3); text-decoration: line-through; }
.print-only { display: none; }
.mascot { width: 72px; height: 72px; }
.pill-nav { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 20px; }
.pill-nav a { font-size: 14px; font-weight: 600; padding: 8px 14px; border-radius: var(--r-pill); border: 2px solid var(--ink); color: var(--ink); background: #fff; }
.pill-nav a.on { background: var(--ink); color: #fff; }
.pill-nav a:hover { text-decoration: none; }
.result { border: 2px solid var(--ink); border-radius: 22px; padding: 24px; background: #fff; position: relative; }
.result.good { background: var(--green-soft); } .result.meh { background: var(--yellow-soft); }
.result .stat-row { border: 0; margin: 10px 0; justify-content: center; }
.result .stat { border-right: 0; flex: 0 1 150px; }

@media print { .topbar, .btn-row, .footer, .crumbs { display: none !important; } body { background: #fff; } .wrap { padding: 0; } .card { break-inside: avoid; } .print-only { display: block; } }

/* ───────── accounts ───────── */
.sync-dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--green); border: 1.5px solid var(--ink); vertical-align: middle; margin: -2px 7px 0 0; flex: none; }
.sync-dot.off { background: var(--yellow); }
.inline-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: stretch; }
.inline-form input { flex: 1 1 220px; min-width: 0; }
.try-box .tip { margin-bottom: 4px; }
.try-box h2, .try-box h3 { margin-top: 0; }