/* Reverse Math Puzzle: marketing site. One stylesheet for every page.
   Brand = the app: cream paper, ink text, gold + green, chunky shadows. Source of truth: src/ (see src/README.md). */

@font-face { font-family: "Nunito"; font-weight: 400 500; font-style: normal; font-display: swap; src: url("/assets/fonts/nunito-Regular.woff2") format("woff2"); }
@font-face { font-family: "Nunito"; font-weight: 600 700; font-style: normal; font-display: swap; src: url("/assets/fonts/nunito-Bold.woff2") format("woff2"); }
@font-face { font-family: "Nunito"; font-weight: 800 900; font-style: normal; font-display: swap; src: url("/assets/fonts/nunito-ExtraBold.woff2") format("woff2"); }

:root {
  --cream: #FBF3E4;
  --paper: #FFFDF8;
  --ink: #2B1D00;
  --muted: #6B5A3A;
  --line: #E9DCC0;
  --gold: #F2A81D;
  --gold-soft: #FFD65C;
  --gold-deep: #B87500;
  --green: #3FA866;
  --green-deep: #1F7A3C;
  --red: #E5533D;
  --purple: #7A3FB0;
  --blue: #2D6FA4;
  --radius: 24px;
  --radius-sm: 14px;
  --shadow: 0 6px 0 var(--ink);
  --shadow-soft: 0 18px 40px rgba(43, 29, 0, .16);
  --max: 1120px;
  --font: "Nunito", "Avenir Next", "Segoe UI", system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); font-size: 1.0625rem; line-height: 1.6; color: var(--ink); background: var(--cream); overflow-x: hidden; }
img, video { display: block; max-width: 100%; height: auto; }   /* every image keeps its own aspect ratio, always */
a { color: inherit; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; }
h1, h2, h3 { font-weight: 900; line-height: 1.08; letter-spacing: -.02em; text-wrap: balance; }
p { text-wrap: pretty; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--ink); color: var(--cream); padding: 10px 16px; border-radius: 10px; font-weight: 800; text-decoration: none; }
.skip:focus { top: 12px; }
.wrap { width: min(100% - 40px, var(--max)); margin-inline: auto; }
.center { text-align: center; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ── nav ─────────────────────────────────────────────────── */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(251, 243, 228, .92); backdrop-filter: blur(10px); border-bottom: 2px solid var(--ink); }
.nav-in { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 900; font-size: 1.15rem; text-decoration: none; letter-spacing: -.01em; }
.brand img { width: 40px; height: 40px; border-radius: 11px; border: 2px solid var(--ink); }
.nav-links { display: flex; align-items: center; gap: 6px; list-style: none; }
.nav-links a { display: block; padding: 8px 14px; border-radius: 999px; font-weight: 700; font-size: .98rem; text-decoration: none; }
.nav-links a:hover { background: rgba(43, 29, 0, .08); }
.nav-links a[aria-current="page"] { background: var(--ink); color: var(--cream); }
.nav-links .nav-cta { background: var(--gold); border: 2px solid var(--ink); box-shadow: 0 3px 0 var(--ink); padding: 7px 18px; font-weight: 900; }
.nav-links .nav-cta:hover { background: var(--gold-soft); }
.burger { display: none; width: 46px; height: 46px; border: 2px solid var(--ink); border-radius: 14px; background: var(--paper); cursor: pointer; padding: 0; align-items: center; justify-content: center; flex-direction: column; gap: 5px; }
.burger span { display: block; width: 20px; height: 3px; border-radius: 2px; background: var(--ink); transition: transform .2s, opacity .2s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ── buttons, badges, chips ──────────────────────────────── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 26px; border-radius: 999px; border: 3px solid var(--ink); background: var(--gold); color: var(--ink); font: 900 1.02rem/1 var(--font); text-decoration: none; box-shadow: var(--shadow); cursor: pointer; transition: transform .12s, box-shadow .12s, background .12s; }
.btn:hover { background: var(--gold-soft); transform: translateY(-2px); box-shadow: 0 8px 0 var(--ink); }
.btn:active { transform: translateY(4px); box-shadow: 0 2px 0 var(--ink); }
.btn-light { background: var(--paper); }
.btn-light:hover { background: #fff; }
.btn-ink { background: var(--ink); color: var(--cream); box-shadow: 0 6px 0 rgba(43, 29, 0, .35); }
.btn-ink:hover { background: #3d2a05; }
.badges { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.badges a { display: block; line-height: 0; border-radius: 10px; transition: transform .12s; }
.badges a:hover { transform: translateY(-2px); }
.badges img { height: 52px; width: auto; max-width: none; }
.badges img[src*="google-play"] { height: 77px; margin: -12.5px; }   /* the official PNG has transparent padding; this makes the visible badge the same height as the App Store one */
.text-link { display: inline-block; font-weight: 800; text-decoration: none; border-bottom: 3px solid var(--gold); padding-bottom: 1px; }
.text-link:hover { border-color: var(--ink); }
.chip { display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px; border-radius: 999px; background: var(--paper); border: 2px solid var(--ink); box-shadow: 0 3px 0 var(--ink); font-weight: 800; font-size: .92rem; }
.eyebrow { display: inline-block; padding: 5px 14px; border-radius: 999px; border: 2px solid var(--ink); background: var(--gold-soft); font-weight: 900; font-size: .78rem; letter-spacing: .09em; text-transform: uppercase; margin-bottom: 18px; }

/* ── phone frames (real app screens) ─────────────────────── */
.phone { width: 100%; border: 6px solid var(--ink); border-radius: 38px; background: var(--ink); overflow: hidden; box-shadow: 0 14px 0 rgba(43, 29, 0, .22); }
.phone img { width: 100%; height: auto; border-radius: 30px; }

/* ── sections ────────────────────────────────────────────── */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-head { max-width: 680px; margin: 0 auto clamp(36px, 5vw, 56px); text-align: center; }
.section-head h2, .split-copy h2 { font-size: clamp(2rem, 4.4vw, 3.1rem); }
.lead { font-size: 1.15rem; color: var(--muted); margin-top: 16px; }
.on-ink .lead { color: rgba(251, 243, 228, .75); }
.paper { background: var(--paper); border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }
.on-ink { background: var(--ink); color: var(--cream); }
.on-ink .eyebrow { background: var(--gold); color: var(--ink); }
.on-gold { background: var(--gold); border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }

/* ── hero ────────────────────────────────────────────────── */
.hero { background: var(--gold); border-bottom: 2px solid var(--ink); overflow: hidden; position: relative; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(60% 70% at 78% 40%, rgba(255, 214, 92, .75), transparent 70%); pointer-events: none; }
.hero-in { position: relative; display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 40px; padding-block: clamp(48px, 7vw, 88px); }
.hero h1 { font-size: clamp(2.7rem, 6.2vw, 4.8rem); letter-spacing: -.035em; }
.hero h1 em { font-style: normal; background: var(--paper); border: 3px solid var(--ink); box-shadow: var(--shadow); border-radius: 18px; padding: 0 .22em; display: inline-block; transform: rotate(-1.5deg); margin-top: .12em; }
.hero .lead { color: var(--ink); opacity: .82; max-width: 30em; font-weight: 600; }
.hero-actions { display: grid; gap: 18px; margin-top: 30px; justify-items: start; }
.hero-note { font-size: .92rem; font-weight: 700; opacity: .7; }
.hero-phones { position: relative; display: flex; justify-content: center; align-items: center; min-height: 520px; }
.hero-phones .phone { position: absolute; width: min(250px, 46%); }
.hero-phones .phone:nth-child(1) { left: 6%; top: 8%; transform: rotate(-6deg); z-index: 1; }
.hero-phones .phone:nth-child(2) { right: 4%; top: 22%; transform: rotate(5deg); z-index: 2; }
.strip { background: var(--ink); color: var(--cream); }
.strip-in { display: flex; flex-wrap: wrap; justify-content: space-around; gap: 12px 28px; padding-block: 18px; font-weight: 800; }
.strip b { color: var(--gold); font-weight: 900; }

/* ── how it works + demo ─────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card { background: var(--paper); border: 3px solid var(--ink); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.card h3 { font-size: 1.25rem; margin-bottom: 8px; }
.card p { color: var(--muted); }
.num { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: var(--gold); border: 3px solid var(--ink); font-weight: 900; margin-bottom: 14px; }
.demo { max-width: 620px; margin: 44px auto 0; background: var(--paper); border: 3px solid var(--ink); border-radius: 32px; box-shadow: 0 10px 0 var(--ink); padding: 34px 28px 30px; text-align: center; }
.demo-target { display: inline-flex; flex-direction: column; align-items: center; background: var(--cream); border: 3px solid var(--ink); border-radius: 22px; padding: 10px 34px 12px; }
.demo-target small { font-weight: 800; letter-spacing: .12em; font-size: .72rem; color: var(--muted); text-transform: uppercase; }
.demo-target strong { font-size: 3.4rem; line-height: 1; font-weight: 900; }
.demo-eq { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 26px 0 20px; font-weight: 900; font-size: 2rem; }
.demo-op { color: var(--muted); width: 22px; }
.slot, .tile { width: 68px; height: 68px; border-radius: 16px; border: 3px solid var(--ink); display: inline-flex; align-items: center; justify-content: center; font: 900 1.9rem/1 var(--font); padding: 0; color: var(--ink); }
.slot { background: var(--cream); border-style: dashed; border-color: var(--line); color: transparent; cursor: pointer; }
.slot.filled { background: var(--gold-soft); border-style: solid; border-color: var(--ink); color: var(--ink); box-shadow: 0 4px 0 var(--ink); }
.slot.ok { background: #cdeed7; }
.slot.bad { background: #ffd9d0; animation: shake .35s; }
.tiles { display: flex; justify-content: center; gap: 12px; min-height: 76px; }
.tile { background: var(--paper); box-shadow: 0 4px 0 var(--ink); cursor: pointer; transition: transform .1s; }
.tile:hover { transform: translateY(-3px); }
.tile[disabled] { opacity: .25; cursor: default; transform: none; box-shadow: none; }
.demo-msg { min-height: 3.2em; margin-top: 18px; font-weight: 700; color: var(--muted); }
.demo-msg.ok { color: var(--green-deep); }
.demo-msg.bad { color: var(--red); }
.demo .btn { margin-top: 6px; padding: 9px 20px; font-size: .9rem; box-shadow: 0 4px 0 var(--ink); }
@keyframes shake { 20%, 60% { transform: translateX(-5px); } 40%, 80% { transform: translateX(5px); } }

/* ── split sections (Daily) ──────────────────────────────── */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(32px, 6vw, 72px); align-items: center; }
.split-copy .lead { margin-bottom: 8px; }
.ticks { list-style: none; display: grid; gap: 14px; margin: 26px 0 30px; }
.ticks li { position: relative; padding-left: 40px; font-weight: 700; }
.ticks li::before { content: "✓"; position: absolute; left: 0; top: -1px; width: 28px; height: 28px; border-radius: 50%; background: var(--green); color: #fff; border: 2px solid var(--ink); font: 900 .9rem/24px var(--font); text-align: center; }
.phone-pair { display: flex; justify-content: center; gap: 18px; padding: 10px 0 30px; }
.phone-pair .phone { width: min(230px, 44%); }
.phone-pair .phone:nth-child(1) { transform: rotate(-3deg); }
.phone-pair .phone:nth-child(2) { transform: translateY(34px) rotate(3deg); }

/* ── battle ──────────────────────────────────────────────── */
.battle-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 26px; }
.bstep { text-align: center; }
.bstep .phone { max-width: 230px; margin: 0 auto 22px; border-color: #5a4720; }
.bstep h3 { font-size: 1.15rem; margin-bottom: 6px; }
.bstep p { font-size: .95rem; color: rgba(251, 243, 228, .72); }
.on-ink .num { background: var(--gold); border-color: var(--cream); color: var(--ink); }
.battle-cta { display: grid; justify-items: center; gap: 18px; margin-top: 52px; }
.on-ink .text-link { border-color: var(--gold); }
.on-ink .text-link:hover { border-color: var(--cream); }

/* ── modes, levels, features ─────────────────────────────── */
.modes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.mode { border: 3px solid var(--ink); border-radius: var(--radius); box-shadow: var(--shadow); padding: 26px 24px 28px; color: #fff; display: flex; flex-direction: column; gap: 10px; }
.mode .ico { font-size: 2.1rem; line-height: 1; }
.mode h3 { font-size: 1.4rem; }
.mode p { opacity: .94; flex: 1; font-weight: 600; }
.mode .chip { align-self: flex-start; color: var(--ink); font-size: .82rem; }
.mode.daily { background: var(--green); }
.mode.battle { background: var(--purple); }
.mode.classic { background: var(--blue); }
.mode.attack { background: #D2691E; }
.levels { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 8px; }
.level { background: var(--paper); border: 3px solid var(--ink); border-radius: 20px; padding: 18px 16px; text-align: center; box-shadow: 0 4px 0 var(--ink); }
.level b { display: block; font-size: 1.1rem; }
.level span { color: var(--muted); font-size: .92rem; font-weight: 600; }
.level i { display: block; height: 8px; border-radius: 4px; background: var(--line); margin: 12px auto 0; max-width: 84px; position: relative; overflow: hidden; }
.level i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: var(--w); background: var(--c); border-radius: 4px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { background: var(--paper); border: 3px solid var(--ink); border-radius: var(--radius); padding: 26px; box-shadow: 0 4px 0 var(--ink); }
.feature .ico { display: inline-flex; width: 52px; height: 52px; align-items: center; justify-content: center; font-size: 1.5rem; background: var(--cream); border: 2px solid var(--ink); border-radius: 16px; margin-bottom: 14px; }
.feature h3 { font-size: 1.12rem; margin-bottom: 6px; }
.feature p { color: var(--muted); font-size: .98rem; }

/* ── web play band, gallery, CTA ─────────────────────────── */
.web-card { max-width: 860px; margin: 0 auto; text-align: center; background: var(--paper); border: 3px solid var(--ink); border-radius: 32px; box-shadow: 0 10px 0 var(--ink); padding: clamp(32px, 5vw, 52px) clamp(22px, 4vw, 44px); }
.web-card h2 { font-size: clamp(1.8rem, 3.6vw, 2.5rem); }
.web-card p { color: var(--muted); max-width: 34em; margin: 14px auto 26px; }
.row { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
.gallery { display: flex; gap: 20px; overflow-x: auto; padding: 8px max(20px, calc((100vw - var(--max)) / 2)) 28px; scroll-snap-type: x mandatory; scrollbar-width: thin; scrollbar-color: var(--ink) transparent; }
.gallery figure { flex: 0 0 auto; width: 250px; margin: 0; scroll-snap-align: center; }
.gallery img { border: 3px solid var(--ink); border-radius: 26px; box-shadow: 0 6px 0 var(--ink); }
.cta { background: var(--gold); border-top: 2px solid var(--ink); text-align: center; }
.cta h2 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
.cta .lead { color: var(--ink); opacity: .8; font-weight: 600; }
.cta .badges { justify-content: center; margin-top: 30px; }
.fineprint { margin-top: 26px; font-size: .9rem; font-weight: 700; opacity: .7; }

/* ── inner pages: header, faq, prose, contact ────────────── */
.page-head { background: var(--gold); border-bottom: 2px solid var(--ink); padding: clamp(44px, 6vw, 76px) 0; }
.page-head h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
.page-head p { margin-top: 12px; font-size: 1.15rem; font-weight: 600; opacity: .8; max-width: 36em; }
.narrow { width: min(100% - 40px, 800px); margin-inline: auto; }
.faq { display: grid; gap: 12px; }
.faq details { background: var(--paper); border: 3px solid var(--ink); border-radius: 20px; box-shadow: 0 4px 0 var(--ink); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 22px; font-weight: 800; font-size: 1.05rem; display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; flex: none; width: 30px; height: 30px; border-radius: 50%; background: var(--gold); border: 2px solid var(--ink); text-align: center; font: 900 1.2rem/26px var(--font); }
.faq details[open] summary::after { content: "−"; }
.faq .answer { padding: 0 22px 20px; color: var(--muted); }
.faq .answer p + p { margin-top: 10px; }
.faq .answer a, .prose a { color: var(--gold-deep); font-weight: 700; }
.tips { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.tips .card { padding: 22px 24px; }
.contact { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.prose { padding: clamp(40px, 6vw, 72px) 0 clamp(64px, 8vw, 100px); }
.prose .narrow > * + * { margin-top: 14px; }
.prose h2 { font-size: 1.6rem; margin-top: 40px; }
.prose h3 { font-size: 1.2rem; margin-top: 28px; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li + li { margin-top: 6px; }
.prose .updated { display: inline-block; font-size: .92rem; color: var(--muted); background: var(--paper); border: 2px solid var(--line); border-radius: 999px; padding: 4px 14px; }
.prose .callout { background: var(--paper); border: 3px solid var(--ink); border-radius: var(--radius-sm); box-shadow: 0 4px 0 var(--ink); padding: 18px 22px; }
.prose table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.prose th, .prose td { text-align: left; padding: 10px 12px; border-bottom: 2px solid var(--line); vertical-align: top; }
.platforms { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; max-width: 880px; margin: 0 auto; }
.platform { text-align: center; display: grid; justify-items: center; gap: 12px; }
.platform .ico { font-size: 2.6rem; }
.platform .req { font-size: .85rem; font-weight: 800; color: var(--muted); background: var(--cream); border: 2px solid var(--line); border-radius: 999px; padding: 3px 14px; }
body.is-android .platforms .platform:nth-child(2) { order: -1; }
.included { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; max-width: 880px; margin: 0 auto; }
.included .card { padding: 20px 22px; box-shadow: 0 4px 0 var(--ink); }
.included h3 { font-size: 1.05rem; margin-bottom: 2px; }
.notfound { min-height: 56vh; display: grid; place-items: center; text-align: center; padding: 60px 0; }
.notfound .big { font-size: clamp(5rem, 18vw, 9rem); font-weight: 900; line-height: 1; letter-spacing: -.05em; }

/* ── footer ──────────────────────────────────────────────── */
.footer { background: var(--ink); color: var(--cream); padding: 52px 0 28px; }
.footer-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 32px; }
.footer .brand img { border-color: var(--cream); }
.footer p { color: rgba(251, 243, 228, .7); margin-top: 12px; max-width: 24em; font-size: .98rem; }
.footer nav { display: grid; grid-template-columns: repeat(2, auto); gap: 8px 40px; align-content: start; }
.footer nav a { text-decoration: none; font-weight: 700; color: rgba(251, 243, 228, .85); }
.footer nav a:hover { color: var(--gold); }
.footer small { display: block; margin-top: 36px; padding-top: 22px; border-top: 1px solid rgba(251, 243, 228, .18); color: rgba(251, 243, 228, .55); font-size: .88rem; }

/* ── motion ──────────────────────────────────────────────── */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .55s ease, transform .55s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .js .reveal { opacity: 1; transform: none; transition: none; } * { animation: none !important; } }

/* ── responsive ──────────────────────────────────────────── */
@media (max-width: 1060px) {
  .modes { grid-template-columns: repeat(2, 1fr); }
  .battle-steps { grid-template-columns: repeat(2, 1fr); gap: 40px 22px; }
}
@media (max-width: 900px) {
  .burger { display: flex; }
  .nav-links { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 4px; padding: 14px 20px 20px; background: var(--cream); border-bottom: 2px solid var(--ink); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 16px; font-size: 1.05rem; }
  .nav-links .nav-cta { text-align: center; margin-top: 6px; }
  .hero-in, .split { grid-template-columns: 1fr; }
  .hero-copy, .split-copy { text-align: center; }
  .hero-actions, .badges { justify-content: center; justify-items: center; }
  .hero .lead { margin-inline: auto; }
  .hero-phones { min-height: 440px; order: 2; }
  .hero-phones .phone { width: min(220px, 44%); }
  .ticks { max-width: 460px; margin-inline: auto; text-align: left; }
  .steps, .features, .tips, .contact, .platforms, .included { grid-template-columns: 1fr; }
  .levels { grid-template-columns: repeat(2, 1fr); }
  .footer-in { flex-direction: column; }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .badges img { height: 46px; }
  .badges img[src*="google-play"] { height: 69px; margin: -11px; }
  .modes, .battle-steps { grid-template-columns: 1fr; }
  .hero-phones { min-height: 380px; }
  .hero-phones .phone { width: min(190px, 46%); border-width: 5px; border-radius: 30px; }
  .slot, .tile { width: 58px; height: 58px; font-size: 1.6rem; }
  .demo { padding: 26px 16px 24px; }
  .demo-eq { gap: 6px; font-size: 1.6rem; }
  .gallery figure { width: 210px; }
}

/* long links and words wrap instead of overflowing (200% text, narrow phones) */
.prose, .faq .answer, .card, .footer { overflow-wrap: anywhere; }

/* footer sits at the bottom on short pages (404) */
body { min-height: 100vh; display: flex; flex-direction: column; }
body > main { flex: 1 0 auto; }

/* analytics consent banner */
.consent { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 50; max-width: 640px; margin-inline: auto; background: var(--paper); color: var(--ink); border: 3px solid var(--ink); border-radius: 18px; box-shadow: 0 6px 0 var(--ink); padding: 16px 18px; display: flex; flex-wrap: wrap; gap: 12px 16px; align-items: center; justify-content: space-between; }
.consent p { flex: 1 1 260px; font-size: .95rem; font-weight: 600; }
.consent a { color: var(--gold-deep); font-weight: 800; text-decoration: underline; }
.consent-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.consent .btn { padding: 10px 18px; font-size: .95rem; }

/* download page: one big store button for the visitor's phone */
.dl .badges img[src*="app-store"] { height: 64px; }
.dl .badges img[src*="google-play"] { height: 95px; margin: -15.5px; }
.is-ios .dl .badges a[data-store="android"], .is-android .dl .badges a[data-store="ios"] { display: none; }
.also { font-size: .98rem; font-weight: 700; color: var(--ink); opacity: .85; }
.also span { display: none; }
.is-ios .also .only-ios, .is-android .also .only-android { display: inline; }
body:not(.is-ios):not(.is-android) .also .only-web { display: inline; }
.also a { font-weight: 800; text-decoration: underline; }
@media (max-width: 560px) { .dl.hero .hero-in { padding-block: 28px 8px; } .dl .eyebrow { display: none; } }
/* slimmer consent bar so it never hides the store button */
.consent { padding: 12px 14px; bottom: 10px; left: 10px; right: 10px; border-width: 2px; box-shadow: 0 4px 0 var(--ink); gap: 8px 12px; }
.consent p { font-size: .85rem; }
.consent .btn { padding: 8px 16px; font-size: .88rem; }

/* download page: playable hook above the store button */
.dl h1 { font-size: clamp(2.4rem, 7vw, 4.2rem); }
.dl .lead { margin-top: 10px; }
.dl-demo { margin: 18px 0 0; padding: 16px 14px 14px; max-width: 420px; border-radius: 26px; box-shadow: 0 6px 0 var(--ink); }
.dl-demo .demo-target { padding: 6px 24px 8px; border-radius: 18px; }
.dl-demo .demo-target strong { font-size: 2.4rem; }
.dl-demo .demo-eq { margin: 14px 0 12px; font-size: 1.6rem; gap: 8px; }
.dl-demo .slot, .dl-demo .tile { width: 56px; height: 56px; font-size: 1.6rem; border-radius: 14px; }
.dl-demo .tiles { min-height: 62px; }
.dl-demo .demo-msg { font-size: .98rem; margin-top: 8px; }
.dl-demo .demo-reset { padding: 6px 16px; font-size: .9rem; margin-top: 6px; }
.dl .hero-actions { margin-top: 20px; gap: 12px; }
.solved-note { display: none; font-weight: 800; }
.demo-solved .solved-note { display: block; }
.demo-solved .dl .badges a { animation: nudge 1.2s ease-in-out 2; }
@keyframes nudge { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.06); } }
.iab-tip { display: none; font-size: .9rem; font-weight: 700; background: rgba(255,255,255,.6); border-radius: 12px; padding: 8px 12px; }
.in-app-browser .iab-tip { display: block; }
@media (max-width: 560px) { .dl .hero-in { gap: 18px; } .dl .phone { max-width: 150px; } }
/* sticky install bar (phones, after the first screen) */
.sticky-install { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: none; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px)); background: var(--paper); border-top: 3px solid var(--ink); }
.sticky-install span { display: grid; line-height: 1.2; }
.sticky-install small { color: var(--muted); font-weight: 700; }
.sticky-install .btn { display: none; padding: 10px 18px; }
.is-ios .sticky-install .only-ios-btn, .is-android .sticky-install .only-android-btn { display: inline-flex; }
@media (max-width: 760px) { .is-ios .sticky-install.show, .is-android .sticky-install.show { display: flex; } body:has(#consent) .sticky-install { display: none !important; } }

.dl-demo .demo-reset { visibility: hidden; }
.dl-demo:has(.slot.filled) .demo-reset { visibility: visible; }

/* compact how-it-plays cards on phones */
@media (max-width: 560px) { .steps { gap: 10px; } .steps .card { padding: 14px 16px; box-shadow: 0 4px 0 var(--ink); } .steps .card h3 { font-size: 1.1rem; } .steps .num { width: 32px; height: 32px; font-size: 1rem; } }

@media (min-width: 900px) { .consent { left: auto; right: 16px; margin: 0; max-width: 400px; } }
.dl-demo .demo-eq { margin: 10px 0 8px; }

@media (max-width: 560px) { .battle-steps { grid-template-columns: repeat(2, 1fr); gap: 22px 12px; } .bstep h3 { font-size: 1rem; } .bstep p { font-size: .85rem; } .bstep .phone { border-width: 4px; border-radius: 26px; margin-bottom: 14px; } .bstep .phone img { border-radius: 20px; } }

/* short home page: three reasons, one swipe row, one call to action */
.why-list { display: grid; gap: 26px; max-width: 900px; margin: 0 auto; }
.why { display: grid; grid-template-columns: 150px 1fr; gap: 22px; align-items: center; }
.why:nth-child(even) { grid-template-columns: 1fr 150px; }
.why:nth-child(even) .phone { order: 2; }
.why .phone { box-shadow: 0 6px 0 rgba(43, 29, 0, .22); border-width: 4px; border-radius: 26px; }
.why .phone img { border-radius: 20px; }
.why h2 { font-size: 1.5rem; margin-bottom: 6px; }
.why p { color: var(--muted); font-weight: 600; }
@media (min-width: 760px) { .why { grid-template-columns: 220px 1fr; gap: 40px; } .why:nth-child(even) { grid-template-columns: 1fr 220px; } .why h2 { font-size: 2rem; } }
.tile, .dl-demo .tile { touch-action: none; user-select: none; -webkit-user-select: none; }
.tile-ghost { position: fixed; z-index: 999; pointer-events: none; transform: translate(-50%, -50%) scale(1.1); opacity: .95; }
.slot.over { border-color: var(--ink); background: var(--gold-soft); }

/* phones: the playable puzzle is the picture, so the hero stays short */
@media (max-width: 760px) { .hero.dl .hero-phones { display: none; } .hero.dl .hero-in { padding-bottom: 28px; } }

/* anchors land below the fixed header */
#daily, #battle, #levels, #screens, #get, #why, #web { scroll-margin-top: 76px; }

/* v3: how-it-works steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(20px, 4vw, 48px); }
.steps li { display: flex; flex-direction: column; align-items: center; text-align: center; }
.steps .phone { width: min(260px, 100%); margin-bottom: 22px; }
.steps h3 { font-size: 1.45rem; margin: 0 0 6px; display: flex; align-items: center; gap: 10px; }
.steps p { margin: 0; color: var(--muted); max-width: 22em; }
.step-n { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--gold); border: 2px solid var(--ink); font-weight: 900; }
.try { text-align: center; margin-top: clamp(28px, 4vw, 44px); }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; gap: 44px; } .steps .phone { width: min(240px, 70%); } }

/* v3b: crop empty phone bottoms, survival band */
.steps .phone, .why .phone, .surv-phones .phone { border-bottom: 0; border-radius: 34px 34px 0 0; box-shadow: none; }
.steps .phone img, .why .phone img, .surv-phones .phone img { aspect-ratio: 520 / 780; object-fit: cover; object-position: top; border-radius: 28px 28px 0 0; }
.why .phone { border-radius: 24px 24px 0 0; } .why .phone img { border-radius: 18px 18px 0 0; aspect-ratio: 520 / 700; }
.steps .phone { width: min(230px, 100%); margin-bottom: 18px; }
.surv-phones { display: flex; justify-content: center; }
.surv-phones .phone { width: min(280px, 70%); }
.ticks { list-style: none; padding: 0; margin: 18px 0 24px; display: grid; gap: 8px; font-weight: 800; }
.ticks li::before { content: "✓"; display: inline-grid; place-items: center; width: 24px; height: 24px; margin-right: 10px; border-radius: 50%; background: var(--gold); color: var(--ink); font-size: .85rem; }
#survival { scroll-margin-top: 76px; }
@media (max-width: 760px) { #survival .split { gap: 28px; } .surv-phones .phone { width: min(240px, 66%); } }