/* Why Wrong? — landing styles (standalone; defines its own tokens) */

/* Self-hosted Nunito (variable, incl. Cyrillic) — replaces Google Fonts */
@font-face {
  font-family: 'Nunito';
  font-style: normal;
  font-weight: 200 1000;
  font-display: swap;
  src: url('/fonts/nunito.woff2') format('woff2');
}
@font-face {
  font-family: 'Nunito';
  font-style: italic;
  font-weight: 200 1000;
  font-display: swap;
  src: url('/fonts/nunito-italic.woff2') format('woff2');
}

:root {
  --paper:#FFF8F0; --surface:#FFFFFF; --surface-2:#FBF2E8;
  --ink:#2E2733; --ink-2:#5B4F5E; --ink-3:#8A7C90;
  --primary:#4E9E77; --primary-mid:#7BBF96; --primary-deep:#3B8460; --primary-soft:#E6F2EB;
  --blush:#E89090; --lavender:#A491D1; --peach:#F5B57E; --sky:#87BBDA; --butter:#F2CE7E;
  --border:#EFE4D8; --border-strong:#E4D6C7;
  --success:#4E9E77; --success-soft:#E6F2EB; --error:#D06E66; --error-soft:#FBE7E4;
  --streak-soft:#FCEFD6;
  --r-sm:10px; --r-md:16px; --r-lg:22px; --r-xl:30px; --r-pill:999px;
  --shadow-sm:0 2px 8px rgba(70,50,60,.06);
  --shadow-md:0 10px 30px rgba(70,50,60,.08);
  --maxw:1120px;
  --font:"Nunito", ui-rounded, "SF Pro Rounded", "Segoe UI", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper:#241F2A; --surface:#2E2836; --surface-2:#352E3E;
    --ink:#F1EAF2; --ink-2:#C9BFD0; --ink-3:#9B8FA6;
    --primary:#A8D5BA; --primary-mid:#8CC7A5; --primary-deep:#6FB58E; --primary-soft:rgba(168,213,186,.14);
    --border:#3C3448; --border-strong:#4A4056;
    --success:#A8D5BA; --success-soft:rgba(168,213,186,.14); --error:#E79A94; --error-soft:rgba(231,154,148,.14);
    --streak-soft:rgba(242,206,126,.16);
    --shadow-sm:0 2px 10px rgba(0,0,0,.25); --shadow-md:0 14px 34px rgba(0,0,0,.32);
  }
}
:root[data-theme="dark"] {
  --paper:#241F2A; --surface:#2E2836; --surface-2:#352E3E;
  --ink:#F1EAF2; --ink-2:#C9BFD0; --ink-3:#9B8FA6;
  --primary:#A8D5BA; --primary-mid:#8CC7A5; --primary-deep:#6FB58E; --primary-soft:rgba(168,213,186,.14);
  --border:#3C3448; --border-strong:#4A4056;
  --success:#A8D5BA; --success-soft:rgba(168,213,186,.14); --error:#E79A94; --error-soft:rgba(231,154,148,.14);
  --streak-soft:rgba(242,206,126,.16);
  --shadow-sm:0 2px 10px rgba(0,0,0,.25); --shadow-md:0 14px 34px rgba(0,0,0,.32);
}

* { box-sizing:border-box; }
body { margin:0; }
.ww { font-family:var(--font); background:var(--paper); color:var(--ink);
      -webkit-font-smoothing:antialiased; line-height:1.55; overflow-x:hidden; }
.ww :focus-visible { outline:3px solid var(--primary); outline-offset:2px; border-radius:6px; }
.wrap { max-width:var(--maxw); margin:0 auto; padding:0 22px; }
h1,h2,h3,p { margin:0; }
h1,h2,h3 { text-wrap:balance; letter-spacing:-.02em; }
.rightform { color:var(--primary); font-weight:900; }

.hd { position:sticky; top:0; z-index:50; backdrop-filter:blur(10px);
      background:color-mix(in srgb, var(--paper) 82%, transparent); border-bottom:1px solid var(--border); }
.hd-in { display:flex; align-items:center; justify-content:space-between; gap:14px; padding:12px 22px; }
.logo { display:flex; align-items:center; gap:10px; font-weight:900; font-size:18px; letter-spacing:-.02em; }
.logo .mark { width:34px; height:34px; border-radius:11px; background:var(--primary); color:#fff;
  display:grid; place-items:center; font-size:19px; font-weight:900; box-shadow:0 3px 0 var(--primary-deep); }
.hd-actions { display:flex; align-items:center; gap:8px; }
.langtog { display:inline-flex; background:var(--surface-2); border:1px solid var(--border); border-radius:var(--r-pill); padding:3px; }
.langtog button { border:none; background:transparent; font-family:inherit; font-weight:800; font-size:13px;
  color:var(--ink-3); padding:6px 12px; border-radius:var(--r-pill); cursor:pointer; }
.langtog button[aria-pressed="true"] { background:var(--surface); color:var(--ink); box-shadow:var(--shadow-sm); }

.btn { font-family:inherit; font-weight:800; font-size:16px; border:none; cursor:pointer;
  border-radius:var(--r-pill); padding:15px 26px; display:inline-flex; align-items:center; gap:9px;
  transition:transform .12s, box-shadow .12s, background .15s; text-decoration:none; }
.btn-primary { background:var(--primary); color:#fff; box-shadow:0 4px 0 var(--primary-deep); }
.btn-primary:hover { transform:translateY(-1px); box-shadow:0 5px 0 var(--primary-deep); }
.btn-primary:active { transform:translateY(3px); box-shadow:0 1px 0 var(--primary-deep); }
.btn-ghost { background:var(--surface); color:var(--ink); border:2px solid var(--border-strong); }
.btn-ghost:hover { border-color:var(--primary); color:var(--primary); }
.btn-sm { padding:11px 18px; font-size:14px; }

.hero { padding:64px 0 40px; }
.hero-grid { display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center; }
.eyebrow { text-transform:uppercase; letter-spacing:.13em; font-size:12px; font-weight:800; color:var(--primary); }
.hero h1 { font-size:clamp(34px,5.4vw,58px); font-weight:900; line-height:1.04; margin:14px 0 0; }
.hero .sub { font-size:clamp(16px,2vw,19px); color:var(--ink-2); font-weight:600; margin-top:20px; max-width:33ch; }
.cta-row { display:flex; flex-wrap:wrap; gap:12px; margin-top:28px; }
.trust { margin-top:18px; font-size:13.5px; font-weight:700; color:var(--ink-3); display:flex; gap:8px; flex-wrap:wrap; align-items:center; }
.trust .dot { width:4px; height:4px; border-radius:50%; background:var(--border-strong); }

.demo { background:var(--surface); border:1px solid var(--border); border-radius:var(--r-xl);
  box-shadow:var(--shadow-md); padding:22px; }
.demo-top { display:flex; align-items:center; justify-content:space-between; margin-bottom:14px; }
.demo-label { font-size:11px; font-weight:800; letter-spacing:.05em; text-transform:uppercase; color:var(--ink-3); }
.demo-pill { font-size:11px; font-weight:800; color:var(--primary); background:var(--primary-soft); padding:5px 11px; border-radius:var(--r-pill); }
.demo-q { display:flex; align-items:baseline; gap:10px; flex-wrap:wrap; margin-bottom:14px; }
.demo-q .base { font-size:34px; font-weight:900; letter-spacing:-.02em; }
.demo-q .arrow { font-size:14px; font-weight:800; color:var(--primary); }
.demo-in { display:flex; gap:8px; }
.demo-in input { flex:1; font-family:inherit; font-size:16px; font-weight:800; color:var(--ink);
  background:var(--surface-2); border:2px solid var(--border-strong); border-radius:var(--r-md); padding:13px 15px; outline:none; }
.demo-in input:focus { border-color:var(--primary); }
.demo-hint { font-size:12px; font-weight:700; color:var(--ink-3); margin-top:10px; }
.demo-hint b { color:var(--ink-2); }
.fb { margin-top:14px; border-radius:var(--r-md); padding:14px 16px; font-weight:700; display:none; }
.fb.show { display:block; animation:pop .25s ease; }
@keyframes pop { from{transform:scale(.96);opacity:0} to{transform:scale(1);opacity:1} }
.fb.correct { background:var(--success-soft); border:2px solid var(--success); }
.fb.wrong { background:var(--error-soft); border:2px solid var(--error); }
.fb .fb-h { font-weight:900; font-size:15px; display:flex; align-items:center; gap:8px; }
.fb.correct .fb-h { color:var(--success); } .fb.wrong .fb-h { color:var(--error); }
.fb .why { margin-top:9px; font-size:13.5px; font-weight:600; color:var(--ink-2); line-height:1.5; }
.fb .pat { margin-top:10px; display:inline-flex; gap:6px; align-items:center; flex-wrap:wrap; }
.fb .chip { font-size:12px; font-weight:800; background:var(--surface); border:1px solid var(--border-strong);
  border-radius:var(--r-pill); padding:5px 10px; color:var(--ink-2); }
.fb .chip .rightform { color:var(--primary); }

.sec { padding:52px 0; }
.sec-head { text-align:center; max-width:640px; margin:0 auto 34px; }
.sec-head .eyebrow { display:block; margin-bottom:10px; }
.sec-head h2 { font-size:clamp(26px,3.6vw,38px); font-weight:900; }
.sec-head p { color:var(--ink-2); font-weight:600; margin-top:12px; font-size:16.5px; }
.band { background:var(--surface-2); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }

.cards { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.card { background:var(--surface); border:1px solid var(--border); border-radius:var(--r-lg); padding:24px; box-shadow:var(--shadow-sm); }
.card .ic { width:46px; height:46px; border-radius:14px; display:grid; place-items:center; font-size:24px; margin-bottom:14px; }
.card h3 { font-size:19px; font-weight:900; } .card p { color:var(--ink-2); font-weight:600; margin-top:8px; font-size:14.5px; }
.ic.mint{background:var(--primary-soft)} .ic.lav{background:color-mix(in srgb,var(--lavender) 22%,transparent)}
.ic.peach{background:color-mix(in srgb,var(--peach) 26%,transparent)} .ic.sky{background:color-mix(in srgb,var(--sky) 24%,transparent)}

.steps { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; counter-reset:s; }
.step { background:var(--surface); border:1px solid var(--border); border-radius:var(--r-lg); padding:22px; position:relative; }
.step .n { counter-increment:s; font-size:13px; font-weight:900; color:var(--primary); background:var(--primary-soft);
  width:30px; height:30px; border-radius:50%; display:grid; place-items:center; margin-bottom:12px; }
.step .n::before { content:counter(s); } .step h3{font-size:16.5px;font-weight:900} .step p{color:var(--ink-2);font-weight:600;margin-top:6px;font-size:14px}

.show-grid { display:grid; grid-template-columns:1fr 1fr; gap:20px; }
.panel { background:var(--surface); border:1px solid var(--border); border-radius:var(--r-lg); padding:22px; box-shadow:var(--shadow-sm); }
.panel h3 { font-size:15px; font-weight:900; display:flex; align-items:center; gap:8px; margin-bottom:14px; }
.vrow { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:11px 0; border-top:1px dashed var(--border); }
.vrow:first-of-type{border-top:none}
.vforms { display:flex; gap:8px; align-items:baseline; flex-wrap:wrap; }
.vforms .b{font-weight:900} .vforms .f{font-weight:800;color:var(--primary)} .vforms .s{color:var(--ink-3);font-weight:700}
.vmean { font-size:13px; font-weight:700; color:var(--ink-3); }
.phr { display:flex; align-items:center; justify-content:space-between; gap:10px; padding:10px 0; border-top:1px dashed var(--border); }
.phr:first-of-type{border-top:none} .phr .p{font-weight:800} .phr .m{font-size:13px;font-weight:700;color:var(--ink-3)}
.tag{font-size:10px;font-weight:800;text-transform:uppercase;letter-spacing:.05em;color:var(--primary);background:var(--primary-soft);padding:3px 8px;border-radius:var(--r-pill)}

.game { display:grid; grid-template-columns:1fr 1fr; gap:36px; align-items:center; }
.game .stats { display:flex; gap:12px; flex-wrap:wrap; }
.stat { background:var(--surface); border:1px solid var(--border); border-radius:var(--r-lg); padding:16px 18px; flex:1; min-width:120px; box-shadow:var(--shadow-sm); }
.stat .v { font-size:26px; font-weight:900; display:flex; align-items:center; gap:6px; }
.stat .k { font-size:12px; font-weight:800; color:var(--ink-3); text-transform:uppercase; letter-spacing:.04em; margin-top:2px; }
.game h2{font-size:clamp(24px,3.4vw,34px);font-weight:900} .game p{color:var(--ink-2);font-weight:600;margin-top:12px}

.faq { max-width:760px; margin:0 auto; display:flex; flex-direction:column; gap:10px; }
details { background:var(--surface); border:1px solid var(--border); border-radius:var(--r-md); padding:4px 18px; }
summary { cursor:pointer; font-weight:800; font-size:16px; padding:14px 0; list-style:none; display:flex; justify-content:space-between; align-items:center; gap:12px; }
summary::-webkit-details-marker{display:none}
summary .plus{color:var(--primary);font-size:22px;transition:transform .2s;flex-shrink:0}
details[open] summary .plus{transform:rotate(45deg)}
details p{color:var(--ink-2);font-weight:600;padding:0 0 16px;font-size:14.5px}
/* Animated FAQ answer: JS toggles height 0 <-> content for a smooth expand/collapse. */
.faq-a{ overflow:hidden; transition:height .3s cubic-bezier(.4,0,.2,1); will-change:height; }

/* PWA install section */
.pwa-card { max-width:760px; margin:0 auto; background:var(--surface); border:1px solid var(--border);
  border-radius:var(--r-xl); box-shadow:var(--shadow-md); padding:28px; display:grid; gap:22px; }
.pwa-benefits { list-style:none; margin:0; padding:0; display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.pwa-benefits li { display:flex; align-items:center; gap:10px; font-weight:800; font-size:14.5px; color:var(--ink-2);
  background:var(--surface-2); border:1px solid var(--border); border-radius:var(--r-md); padding:12px 14px; }
.pwa-ic { width:34px; height:34px; flex-shrink:0; border-radius:11px; display:grid; place-items:center;
  font-size:18px; background:var(--primary-soft); }
.pwa-action { display:flex; flex-direction:column; align-items:center; gap:14px; text-align:center; }
.pwa-action .btn { align-self:center; }
.pwa-ios { width:100%; max-width:460px; background:var(--surface-2); border:1px solid var(--border);
  border-radius:var(--r-lg); padding:18px 22px; text-align:left; }
.pwa-ios-h { display:flex; align-items:center; gap:9px; font-weight:900; font-size:15px; color:var(--ink); margin-bottom:10px; }
.pwa-ios-mark { width:28px; height:28px; flex-shrink:0; border-radius:9px; display:grid; place-items:center;
  font-size:16px; color:var(--primary); background:var(--primary-soft); }
.pwa-ios-steps { margin:0; padding-left:20px; display:flex; flex-direction:column; gap:7px;
  font-size:14px; font-weight:600; color:var(--ink-2); line-height:1.5; }
.pwa-ios-steps li::marker { color:var(--primary); font-weight:900; }
.pwa-fallback { font-size:13.5px; font-weight:700; color:var(--ink-3); margin:0; }

.final { text-align:center; }
.final-card { background:linear-gradient(135deg, var(--primary-soft), color-mix(in srgb,var(--lavender) 18%,transparent));
  border:1px solid var(--border); border-radius:var(--r-xl); padding:48px 28px; }
.final-card h2 { font-size:clamp(26px,4vw,40px); font-weight:900; } .final-card p{color:var(--ink-2);font-weight:600;margin:12px auto 0;max-width:44ch}

footer { border-top:1px solid var(--border); padding:30px 0; margin-top:20px; }
.ft { display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap; color:var(--ink-3); font-weight:700; font-size:13.5px; }
.ft a{color:var(--ink-3);text-decoration:none} .ft a:hover{color:var(--primary)}
.ft-links{display:flex;gap:18px;flex-wrap:wrap}

@media (max-width:860px){
  .hero-grid,.game,.show-grid{grid-template-columns:minmax(0,1fr); gap:30px}
  .cards,.steps{grid-template-columns:minmax(0,1fr)}
  .pwa-benefits{grid-template-columns:1fr}
  .hero{padding:40px 0 20px}
  .hero .sub{max-width:none}
  /* Prevent grid blowout: let items shrink below their content's min-width so a
     wide child (e.g. the demo's input+button row) can't force the track wider
     than the viewport (was overflowing to ~407px on a 375px screen). */
  .hero-grid>*,.game>*,.show-grid>*,.cards>*,.steps>*{min-width:0}
  .demo-in input{min-width:0}
}
@media (max-width:600px){
  /* Header would overflow a phone: logo + CTA + language toggle don't fit one
     row. Drop the (redundant) header CTA — the hero has the primary CTA — and
     keep the compact logo + language toggle. */
  .hd .btn-primary{display:none}
  .hd-in{gap:10px}
}
@media (prefers-reduced-motion: reduce){ *{animation:none!important; transition:none!important} }