/* Lift — AI English tutor. Design rules (7):
   1 surface: cool off-white / deep forest night; 2 ink: forest green; 3 ONE accent: lime (always with dark text);
   4 type: Onest for Ukrainian/UI, Literata italic = English language on the page (semantic rule);
   5 shapes: buttons pill, cards 18px, inputs 12px; 6 the lift: floors A1..C1 as the through-motif (level rail, step display);
   7 motion: UI 200ms ease, reveals 600ms cubic-bezier(.16,1,.3,1), stagger 60ms, reduced-motion = none. */
:root {
  --bg: #f2f4ef;
  --surface: #fbfcf9;
  --surface-2: #e7ebe3;
  --ink: #10261f;
  --ink-2: #3c5249;
  --ink-3: #5f7269;
  --line: #d3dacf;
  --accent: #c6ef5e;
  --accent-ink: #10261f;
  --accent-soft: #e9f8c4;
  --good: #1f7a4d;
  --good-soft: #dff1e6;
  --bad: #c2412a;
  --bad-soft: #fbe5df;
  --shadow: 0 1px 0 rgba(16, 38, 31, .04), 0 12px 32px -18px rgba(16, 38, 31, .28);
  --r-card: 18px;
  --r-input: 12px;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --sans: "Onest", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif: "Literata", Georgia, serif;
  --wrap: 1200px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1612; --surface: #12211c; --surface-2: #1a2c26; --ink: #e6efe9; --ink-2: #b5c6bd; --ink-3: #8ea198;
    --line: #2a3f37; --accent: #c6ef5e; --accent-ink: #10261f; --accent-soft: #24371a; --good: #6fd39c; --good-soft: #163527;
    --bad: #ff8a73; --bad-soft: #3a1d17; --shadow: 0 1px 0 rgba(0,0,0,.2), 0 16px 40px -20px rgba(0,0,0,.6); color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1612; --surface: #12211c; --surface-2: #1a2c26; --ink: #e6efe9; --ink-2: #b5c6bd; --ink-3: #8ea198;
  --line: #2a3f37; --accent: #c6ef5e; --accent-ink: #10261f; --accent-soft: #24371a; --good: #6fd39c; --good-soft: #163527;
  --bad: #ff8a73; --bad-soft: #3a1d17; --shadow: 0 1px 0 rgba(0,0,0,.2), 0 16px 40px -20px rgba(0,0,0,.6); color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.en { font-family: var(--serif); font-style: italic; font-weight: 450; letter-spacing: -.005em; }
en { font-family: var(--serif); font-style: italic; }
.muted { color: var(--ink-3); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- header ---------- */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.top.scrolled { border-bottom-color: var(--line); }
.top .wrap { height: 64px; display: flex; align-items: center; gap: 20px; }
.logo { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; font-weight: 800; font-size: 22px; letter-spacing: -.04em; }
.logo-mark { width: 26px; height: 30px; border-radius: 7px; background: var(--ink); position: relative; display: inline-block; }
.logo-mark::before, .logo-mark::after { content: ""; position: absolute; left: 50%; transform: translateX(-50%); width: 0; height: 0; border-left: 5px solid transparent; border-right: 5px solid transparent; }
.logo-mark::before { top: 6px; border-bottom: 7px solid var(--accent); }
.logo-mark::after { bottom: 6px; border-top: 7px solid color-mix(in srgb, var(--bg) 35%, transparent); }
.logo small { font-size: 11px; font-weight: 500; letter-spacing: 0; color: var(--ink-3); margin-left: 2px; align-self: flex-end; margin-bottom: 4px; }
.nav { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav a { text-decoration: none; font-size: 15px; color: var(--ink-2); transition: color .2s; }
.nav a:hover { color: var(--ink); }
.nav a.btn { color: var(--bg); }
.nav a.btn:hover { color: var(--bg); }
@media (max-width: 860px) { .nav a.hide-m { display: none; } .nav { gap: 14px; } }

/* ---------- buttons ---------- */
.btn { --h: 52px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: var(--h); padding: 0 26px; border-radius: 999px; border: 1.5px solid var(--ink); background: var(--ink); color: var(--bg); font-weight: 600; font-size: 16px; text-decoration: none; cursor: pointer; white-space: nowrap; transition: transform .2s var(--ease-out), background .2s, color .2s, border-color .2s; }
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(1px) scale(.99); }
.btn.accent { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--ink); }
.btn.sm { --h: 40px; padding: 0 18px; font-size: 15px; }
.btn[disabled] { opacity: .45; cursor: not-allowed; transform: none; }
.btn i { font-size: 1.15em; }
.link { background: none; border: 0; padding: 0; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; color: var(--ink-2); font-size: 15px; }

/* ---------- landing ---------- */
.hero { padding: 40px 0 64px; }
.hero .wrap { display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; min-height: calc(100svh - 64px - 104px); }
.hero h1 { font-size: clamp(40px, 5.6vw, 76px); line-height: .98; letter-spacing: -.045em; font-weight: 800; margin: 0 0 22px; }
.hero h1 .en { font-weight: 400; letter-spacing: -.03em; display: inline-block; padding-bottom: .06em; }
.hero p.sub { font-size: 19px; color: var(--ink-2); max-width: 30em; margin: 0 0 30px; }
.hero .ctas { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.hero .note { margin-top: 18px; font-size: 14px; color: var(--ink-3); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; gap: 36px; min-height: 0; } .hero { padding: 24px 0 48px; } }

/* live demo card (real mini exercise) */
.demo { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; padding: 26px; box-shadow: var(--shadow); position: relative; }
.demo-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; font-size: 13px; color: var(--ink-3); }
.lift-display { display: inline-flex; align-items: center; gap: 8px; font-variant-numeric: tabular-nums; font-weight: 700; font-size: 13px; color: var(--ink); background: var(--surface-2); border-radius: 999px; padding: 5px 12px 5px 8px; }
.lift-display .arr { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); display: grid; place-items: center; font-size: 11px; color: var(--accent-ink); }
.demo-q { font-size: 15px; color: var(--ink-2); margin: 0 0 6px; }
.demo-sent { font-family: var(--sans); font-weight: 700; font-size: 26px; line-height: 1.25; margin: 0 0 20px; letter-spacing: -.01em; }
.demo-sent s { text-decoration-color: var(--bad); text-decoration-thickness: 2px; }

/* ---------- options / exercises (shared by demo, test, lesson) ---------- */
.opts { display: grid; gap: 10px; }
.opt { display: flex; align-items: center; gap: 14px; width: 100%; text-align: left; padding: 15px 18px; border-radius: 14px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font-size: 17px; line-height: 1.35; transition: border-color .2s, background .2s, transform .2s var(--ease-out); }
.opt:hover:not([disabled]) { border-color: var(--ink-3); }
.opt:active:not([disabled]) { transform: scale(.99); }
.opt .k { flex: none; width: 28px; height: 28px; border-radius: 8px; background: var(--surface-2); display: grid; place-items: center; font-size: 13px; font-weight: 700; color: var(--ink-2); }
.opt .t { font-family: var(--serif); font-style: italic; font-size: 18px; }
.opt.plain .t { font-family: var(--sans); font-style: normal; font-size: 16px; }
.opt.sel { border-color: var(--ink); }
.opt.good { border-color: var(--good); background: var(--good-soft); }
.opt.good .k { background: var(--good); color: #fff; }
.opt.bad { border-color: var(--bad); background: var(--bad-soft); }
.opt.bad .k { background: var(--bad); color: #fff; }
.opt[disabled] { cursor: default; }
.opt.idk { border-style: dashed; color: var(--ink-3); }
.opt.idk .t { font-family: var(--sans); font-style: normal; font-size: 15px; }
.explain { margin-top: 14px; padding: 14px 16px; border-radius: 14px; background: var(--surface-2); font-size: 15.5px; line-height: 1.55; color: var(--ink-2); animation: rise .45s var(--ease-out) both; }
.explain.good { background: var(--good-soft); color: var(--ink); }
.explain.bad { background: var(--bad-soft); color: var(--ink); }
.explain b { color: var(--ink); }
.explain strong.tag { display: block; font-size: 13px; letter-spacing: .02em; margin-bottom: 2px; }
.explain.good strong.tag { color: var(--good); }
.explain.bad strong.tag { color: var(--bad); }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- sections ---------- */
section.block { padding: 112px 0; }
section.block.tight { padding: 80px 0; }
.h2 { font-size: clamp(32px, 4vw, 52px); line-height: 1.02; letter-spacing: -.04em; font-weight: 800; margin: 0 0 18px; max-width: 16em; }
.lead-p { font-size: 19px; color: var(--ink-2); max-width: 36em; margin: 0 0 48px; }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 14px; }
@media (max-width: 760px) { section.block { padding: 72px 0; } section.block.tight { padding: 56px 0; } .lead-p { margin-bottom: 32px; } }

/* how it works: lesson anatomy timeline */
.anatomy { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 2px solid var(--ink); }
.anatomy li { list-style: none; padding: 22px 22px 0 0; position: relative; }
.anatomy li::before { content: ""; position: absolute; top: -7px; left: 0; width: 12px; height: 12px; border-radius: 50%; background: var(--bg); border: 2px solid var(--ink); }
.anatomy li:last-child::before { background: var(--accent); border-color: var(--ink); }
.anatomy .min { font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.anatomy h3 { font-size: 19px; margin: 4px 0 6px; letter-spacing: -.02em; }
.anatomy p { margin: 0; font-size: 15.5px; color: var(--ink-2); line-height: 1.5; }
.anatomy-wrap { padding: 0; margin: 0; }
@media (max-width: 900px) { .anatomy { grid-template-columns: 1fr; border-top: 0; border-left: 2px solid var(--ink); padding-left: 0; } .anatomy li { padding: 0 0 28px 26px; } .anatomy li::before { top: 4px; left: -7px; } }

/* AI feedback showcase */
.fb-show { display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; align-items: start; }
@media (max-width: 900px) { .fb-show { grid-template-columns: 1fr; } }
.paper { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-card); padding: 26px; }
.paper h4 { margin: 0 0 10px; font-size: 14px; color: var(--ink-3); font-weight: 600; }
.paper .learner { font-family: var(--serif); font-style: italic; font-size: 19px; line-height: 1.55; margin: 0; }
mark.err { background: var(--bad-soft); color: inherit; border-bottom: 2px solid var(--bad); padding: 0 2px; border-radius: 3px; }

/* scores */
.scores { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 4px 0 18px; }
.score { background: var(--surface-2); border-radius: 12px; padding: 10px 12px; }
.score b { display: block; font-size: 24px; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.score b small { font-size: 14px; color: var(--ink-3); font-weight: 500; }
.score span { font-size: 12.5px; color: var(--ink-3); line-height: 1.3; display: block; }
@media (max-width: 520px) { .scores { grid-template-columns: repeat(2, 1fr); } }
.corr { list-style: none; padding: 0; margin: 0 0 16px; display: grid; gap: 10px; }
.corr li { padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); font-size: 15px; }
.corr .from { font-family: var(--serif); font-style: italic; text-decoration: line-through; text-decoration-color: var(--bad); color: var(--ink-2); }
.corr .to { font-family: var(--serif); font-style: italic; font-weight: 600; color: var(--good); }
.corr .why { display: block; margin-top: 4px; color: var(--ink-2); font-size: 14.5px; }
.improved { font-family: var(--serif); font-style: italic; font-size: 17px; line-height: 1.6; background: var(--accent-soft); padding: 14px 16px; border-radius: 12px; margin: 6px 0 0; }

/* the lift (levels) */
.shaft { display: grid; grid-template-columns: 120px 1fr; gap: 0 40px; }
.shaft-rail { position: relative; }
.shaft-rail .cab { position: sticky; top: 120px; width: 120px; height: 150px; border-radius: 16px; background: var(--ink); color: var(--bg); display: grid; place-items: center; text-align: center; }
.cab .now { font-size: 46px; font-weight: 800; letter-spacing: -.04em; line-height: 1; font-variant-numeric: tabular-nums; }
.cab .lbl { font-size: 12px; opacity: .7; margin-top: 4px; }
.cab .arrow { width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; margin: 0 auto 8px; font-size: 14px; }
.floors { display: flex; flex-direction: column-reverse; gap: 0; }
.floor { display: grid; grid-template-columns: 90px 1fr auto; gap: 24px; padding: 30px 0; border-top: 1px solid var(--line); opacity: .45; transition: opacity .5s var(--ease-out); }
.floor.lit { opacity: 1; }
.floor .code { font-size: 44px; font-weight: 800; letter-spacing: -.05em; line-height: 1; }
.floor h3 { margin: 0 0 6px; font-size: 21px; letter-spacing: -.02em; }
.floor p { margin: 0; color: var(--ink-2); font-size: 16px; max-width: 34em; }
.floor .tag { align-self: start; font-size: 13px; font-weight: 600; padding: 6px 12px; border-radius: 999px; background: var(--surface-2); color: var(--ink-2); white-space: nowrap; }
.floor .tag.on { background: var(--accent); color: var(--accent-ink); }
@media (max-width: 760px) { .shaft { grid-template-columns: 1fr; } .shaft-rail { display: none; } .floor { grid-template-columns: 64px 1fr; opacity: 1; } .floor .tag { grid-column: 2; justify-self: start; } .floor .code { font-size: 34px; } }

/* prices */
.price-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: var(--surface); margin-bottom: 28px; }
.price-hero > div { padding: 32px; }
.price-hero .them { border-right: 1px solid var(--line); }
.price-hero .big { font-size: clamp(44px, 6vw, 76px); font-weight: 800; letter-spacing: -.05em; line-height: 1; margin: 10px 0 8px; font-variant-numeric: tabular-nums; }
.price-hero .them .big { color: var(--ink-3); }
.price-hero .us { background: var(--accent-soft); }
.price-hero small { font-size: 14px; color: var(--ink-3); }
@media (max-width: 760px) { .price-hero { grid-template-columns: 1fr; } .price-hero .them { border-right: 0; border-bottom: 1px solid var(--line); } }
.plans { display: grid; grid-template-columns: 1.15fr 1fr 1fr; gap: 14px; }
.plan { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-card); padding: 26px; display: flex; flex-direction: column; gap: 6px; }
.plan.main { border: 2px solid var(--ink); }
.plan h3 { margin: 0; font-size: 18px; }
.plan .p { font-size: 40px; font-weight: 800; letter-spacing: -.04em; line-height: 1.05; margin: 8px 0 0; }
.plan .p small { font-size: 16px; font-weight: 500; color: var(--ink-3); letter-spacing: 0; }
.plan ul { padding: 0; margin: 12px 0 18px; list-style: none; display: grid; gap: 8px; font-size: 15.5px; color: var(--ink-2); }
.plan li { padding-left: 24px; position: relative; }
.plan li::before { content: ""; position: absolute; left: 2px; top: .55em; width: 12px; height: 7px; border-left: 2px solid var(--good); border-bottom: 2px solid var(--good); transform: rotate(-45deg); }
.plan .btn { margin-top: auto; }
@media (max-width: 900px) { .plans { grid-template-columns: 1fr; } }
.src { font-size: 13px; color: var(--ink-3); margin-top: 16px; }

/* FAQ */
.faq { max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 22px 40px 22px 0; font-size: 19px; font-weight: 600; letter-spacing: -.01em; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 18px; font-size: 26px; font-weight: 400; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 22px; color: var(--ink-2); max-width: 44em; }

/* final CTA */
.final { background: var(--ink); color: var(--bg); border-radius: 28px; padding: 64px 48px; display: grid; grid-template-columns: 1.3fr 1fr; gap: 32px; align-items: end; }
.final h2 { font-size: clamp(32px, 4.4vw, 56px); line-height: 1; letter-spacing: -.045em; margin: 0; font-weight: 800; }
.final p { color: color-mix(in srgb, var(--bg) 75%, transparent); margin: 14px 0 0; }
.final .ctas { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
.final .btn.ghost { color: var(--bg); border-color: color-mix(in srgb, var(--bg) 35%, transparent); }
@media (max-width: 800px) { .final { grid-template-columns: 1fr; padding: 40px 24px; } .final .ctas { justify-content: flex-start; } }
:root[data-theme="dark"] .final, :root:not([data-theme="light"]) .final { }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .final { background: var(--surface-2); color: var(--ink); } :root:not([data-theme="light"]) .final p { color: var(--ink-2); } :root:not([data-theme="light"]) .final .btn.ghost { color: var(--ink); border-color: var(--line); } }

footer.foot { padding: 48px 0 56px; color: var(--ink-3); font-size: 14px; }
footer.foot .wrap { display: flex; flex-wrap: wrap; gap: 16px 28px; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 28px; }
footer.foot a { color: var(--ink-2); }

/* reveal */
.rv { opacity: 0; transform: translateY(18px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); transition-delay: calc(var(--i, 0) * 60ms); }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .rv { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } * { animation-duration: .01ms !important; } }

/* ---------- app shell (test / lesson / nmt / me) ---------- */
.app { min-height: calc(100svh - 64px); padding: 28px 0 80px; }
.stage { width: min(720px, 100% - 32px); margin-inline: auto; }
.stage.wide { width: min(980px, 100% - 32px); }
.progress { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
.progress .bar { flex: 1; height: 6px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.progress .bar i { display: block; height: 100%; width: 0; background: var(--ink); border-radius: 99px; transition: width .5s var(--ease-out); }
.progress .count { font-size: 14px; font-variant-numeric: tabular-nums; color: var(--ink-2); min-width: 54px; text-align: right; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-card); padding: 30px; box-shadow: var(--shadow); animation: rise .5s var(--ease-out) both; }
@media (max-width: 560px) { .card { padding: 22px 18px; border-radius: 16px; } }
.card h1, .card h2 { letter-spacing: -.035em; line-height: 1.08; margin: 0 0 14px; }
.card h1 { font-size: clamp(30px, 4vw, 42px); }
.card h2 { font-size: clamp(24px, 3vw, 30px); }
.kicker { font-size: 13px; font-weight: 600; color: var(--ink-3); margin: 0 0 10px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 99px; background: var(--surface-2); font-size: 12.5px; font-weight: 600; color: var(--ink-2); }
.chip.acc { background: var(--accent); color: var(--accent-ink); }
.prompt { font-family: var(--serif); font-style: italic; font-size: clamp(22px, 2.8vw, 28px); line-height: 1.3; margin: 0 0 22px; letter-spacing: -.01em; white-space: pre-line; }
.prompt .gapline { display: inline-block; min-width: 3.2em; border-bottom: 2px solid var(--ink-3); }
.instr { font-size: 15px; color: var(--ink-3); margin: 0 0 8px; }
.body-uk { font-size: 17px; line-height: 1.65; color: var(--ink); }
.body-uk en, .body-uk .en { font-size: 1.04em; }
.ex-list { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; }
.ex-list li { padding: 12px 16px; border-left: 3px solid var(--accent); background: var(--surface-2); border-radius: 0 12px 12px 0; }
.ex-list .e { font-family: var(--serif); font-style: italic; font-size: 18px; display: block; }
.ex-list .u { font-size: 14.5px; color: var(--ink-3); }
.say { border: 0; background: none; cursor: pointer; color: var(--ink-3); padding: 0 4px; vertical-align: middle; font-size: 18px; }
.say:hover { color: var(--ink); }
table.gt { width: 100%; border-collapse: collapse; margin-top: 18px; font-size: 15px; }
table.gt th, table.gt td { text-align: left; padding: 10px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.gt th { font-size: 13px; color: var(--ink-3); font-weight: 600; }
table.gt td { font-family: var(--serif); font-style: italic; }
table.gt td:first-child { font-family: var(--sans); font-style: normal; color: var(--ink-2); }
.tbl-scroll { overflow-x: auto; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-top: 24px; }
.actions .grow { flex: 1; }
.input, textarea.input { width: 100%; padding: 14px 16px; border-radius: var(--r-input); border: 1.5px solid var(--line); background: var(--bg); color: var(--ink); font: 400 18px/1.5 var(--sans); transition: border-color .2s; }
textarea.input { font-family: var(--serif); font-style: italic; min-height: 180px; resize: vertical; font-size: 18px; }
.input:focus { outline: none; border-color: var(--ink); }
.input.good { border-color: var(--good); background: var(--good-soft); }
.input.bad { border-color: var(--bad); background: var(--bad-soft); }
.gap-in { font-family: var(--serif); font-style: italic; font-size: 22px; max-width: 360px; }
label.lbl { display: block; font-size: 14px; font-weight: 600; margin: 16px 0 6px; color: var(--ink-2); }
.hint { font-size: 14px; color: var(--ink-3); margin-top: 6px; }
.wc { font-size: 14px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.wc.ok { color: var(--good); }

/* tokens (order task) */
.tokens { display: flex; flex-wrap: wrap; gap: 8px; min-height: 52px; }
.tok { padding: 10px 14px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font-family: var(--serif); font-style: italic; font-size: 19px; transition: transform .15s var(--ease-out), border-color .2s; }
.tok:hover { border-color: var(--ink-3); }
.tok.used { opacity: .25; pointer-events: none; }
.built { min-height: 64px; padding: 10px; border-radius: 14px; border: 1.5px dashed var(--line); margin-bottom: 14px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.built .tok { background: var(--accent-soft); border-color: transparent; }
.built.good { border-color: var(--good); border-style: solid; background: var(--good-soft); }
.built.bad { border-color: var(--bad); border-style: solid; background: var(--bad-soft); }

/* match */
.match { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.match .col { display: grid; gap: 10px; align-content: start; }
.mi { padding: 13px 14px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; text-align: left; font-size: 15.5px; line-height: 1.35; transition: border-color .2s, background .2s; }
.mi.l { font-family: var(--serif); font-style: italic; font-size: 17px; }
.mi.sel { border-color: var(--ink); background: var(--surface-2); }
.mi.done { border-color: var(--good); background: var(--good-soft); cursor: default; }
.mi.wrong { border-color: var(--bad); background: var(--bad-soft); }
@media (max-width: 520px) { .mi { font-size: 14px; padding: 11px 10px; } .mi.l { font-size: 15.5px; } }

/* reading / listening */
.text-block { font-family: var(--serif); font-size: 18px; line-height: 1.7; background: var(--bg); border-radius: 14px; padding: 20px 22px; margin: 0 0 20px; max-height: 52vh; overflow: auto; border: 1px solid var(--line); }
.text-block p { margin: 0 0 12px; }
.text-block p:last-child { margin: 0; }
.glossary { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 14px; color: var(--ink-3); margin: -8px 0 20px; }
.glossary b { font-family: var(--serif); font-style: italic; font-weight: 500; color: var(--ink-2); }
.player { display: flex; align-items: center; gap: 14px; padding: 16px; border-radius: 16px; background: var(--surface-2); margin-bottom: 20px; flex-wrap: wrap; }
.play { width: 56px; height: 56px; border-radius: 50%; border: 0; background: var(--ink); color: var(--bg); cursor: pointer; font-size: 22px; display: grid; place-items: center; flex: none; }
.play.on { background: var(--accent); color: var(--accent-ink); }
.wave { display: flex; gap: 3px; align-items: center; height: 28px; flex: 1; min-width: 120px; }
.wave i { width: 3px; border-radius: 3px; background: var(--ink-3); height: 30%; opacity: .5; }
.player.playing .wave i { animation: wv 1s ease-in-out infinite; animation-delay: calc(var(--d) * -90ms); opacity: 1; }
@keyframes wv { 0%,100% { height: 25%; } 50% { height: 100%; } }
.speed { font-size: 13px; }
.script { margin-top: 10px; font-size: 15.5px; }
.script p { margin: 0 0 6px; }
.script b { font-weight: 600; color: var(--ink-3); font-size: 13px; margin-right: 6px; }
.script span { font-family: var(--serif); font-style: italic; }
.qnum { font-size: 13px; font-weight: 600; color: var(--ink-3); margin: 22px 0 8px; }

/* recorder */
.rec { display: flex; align-items: center; gap: 16px; padding: 18px; border-radius: 16px; border: 1.5px dashed var(--line); margin: 18px 0; flex-wrap: wrap; }
.rec-btn { width: 68px; height: 68px; border-radius: 50%; border: 0; background: var(--bad); color: #fff; font-size: 26px; cursor: pointer; display: grid; place-items: center; flex: none; transition: transform .2s; }
.rec-btn.on { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--bad) 45%, transparent); } 50% { box-shadow: 0 0 0 12px transparent; } }
.timer { font-size: 28px; font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.points { margin: 12px 0 0; padding-left: 20px; color: var(--ink-2); font-size: 16px; }
.points li { margin-bottom: 4px; }
.useful { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.useful span { font-family: var(--serif); font-style: italic; font-size: 15px; padding: 6px 12px; border-radius: 99px; background: var(--surface-2); }
details.model { margin-top: 18px; }
details.model summary { cursor: pointer; font-weight: 600; font-size: 15px; color: var(--ink-2); }
details.model p { font-family: var(--serif); font-style: italic; font-size: 17px; line-height: 1.6; margin: 10px 0 0; padding: 14px 16px; background: var(--surface-2); border-radius: 12px; }
.skeleton { display: grid; gap: 10px; margin-top: 18px; }
.skeleton i { display: block; height: 14px; border-radius: 8px; background: linear-gradient(90deg, var(--surface-2), color-mix(in srgb, var(--surface-2) 40%, var(--surface)), var(--surface-2)); background-size: 200% 100%; animation: sh 1.2s linear infinite; }
.skeleton i:nth-child(2) { width: 82%; } .skeleton i:nth-child(3) { width: 64%; }
@keyframes sh { to { background-position: -200% 0; } }
.notice { padding: 14px 16px; border-radius: 12px; background: var(--surface-2); color: var(--ink-2); font-size: 15px; margin-top: 14px; }
.notice.bad { background: var(--bad-soft); color: var(--ink); }

/* result */
.result-top { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: center; }
.result-cab { width: 150px; height: 180px; border-radius: 20px; background: var(--ink); color: var(--bg); display: grid; place-items: center; text-align: center; }
.result-cab .now { font-size: 64px; font-weight: 800; letter-spacing: -.05em; line-height: 1; font-variant-numeric: tabular-nums; }
.result-cab .arrow { width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; margin: 0 auto 10px; }
.result-cab small { display: block; font-size: 12px; opacity: .7; margin-top: 6px; }
@media (max-width: 560px) { .result-top { grid-template-columns: 1fr; } .result-cab { width: 100%; height: 150px; } }
.skillbars { display: grid; gap: 12px; margin: 22px 0; }
.sk { display: grid; grid-template-columns: 110px 1fr 48px; gap: 12px; align-items: center; font-size: 15px; }
.sk .t { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.sk .t i { display: block; height: 100%; background: var(--ink); border-radius: 99px; }
.sk b { text-align: right; font-variant-numeric: tabular-nums; }
.can { list-style: none; padding: 0; margin: 16px 0; display: grid; gap: 10px; }
.can li { padding-left: 28px; position: relative; }
.can li::before { content: ""; position: absolute; left: 4px; top: .5em; width: 12px; height: 7px; border-left: 2px solid var(--good); border-bottom: 2px solid var(--good); transform: rotate(-45deg); }
.review-list { display: grid; gap: 10px; margin-top: 14px; }
.review-list details { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; background: var(--surface); }
.review-list summary { cursor: pointer; font-size: 15px; display: flex; gap: 10px; align-items: baseline; }
.review-list summary .en { font-size: 16px; }
.review-list p { margin: 8px 0 0; font-size: 14.5px; color: var(--ink-2); }
.ok-dot, .no-dot { flex: none; width: 10px; height: 10px; border-radius: 50%; transform: translateY(1px); }
.ok-dot { background: var(--good); } .no-dot { background: var(--bad); }

/* course map */
.course { display: grid; gap: 14px; }
.unit { border: 1px solid var(--line); border-radius: var(--r-card); background: var(--surface); padding: 20px 22px; }
.unit h3 { margin: 0 0 4px; font-size: 18px; letter-spacing: -.02em; }
.unit .meta { font-size: 13.5px; color: var(--ink-3); margin: 0 0 12px; }
.lessons { display: grid; gap: 8px; }
.lrow { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 12px; background: var(--bg); text-decoration: none; border: 1px solid transparent; transition: border-color .2s; }
a.lrow:hover { border-color: var(--line); }
.lrow .n { width: 30px; height: 30px; border-radius: 9px; background: var(--surface-2); display: grid; place-items: center; font-size: 13px; font-weight: 700; flex: none; }
.lrow.done .n { background: var(--good); color: #fff; }
.lrow .tt { flex: 1; font-size: 15.5px; line-height: 1.3; }
.lrow .tt small { display: block; color: var(--ink-3); font-size: 13px; }
.lrow .st { font-size: 12.5px; font-weight: 600; color: var(--ink-3); white-space: nowrap; }
.lrow .st.free { color: var(--accent-ink); background: var(--accent); padding: 3px 9px; border-radius: 99px; }
.lrow.locked { opacity: .7; cursor: pointer; }
.tabs { display: flex; gap: 6px; padding: 4px; background: var(--surface-2); border-radius: 999px; width: max-content; max-width: 100%; overflow-x: auto; margin-bottom: 20px; }
.tabs button { border: 0; background: none; padding: 9px 18px; border-radius: 999px; cursor: pointer; font-weight: 600; font-size: 15px; color: var(--ink-2); white-space: nowrap; }
.tabs button.on { background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }

/* flashcards */
.flash { perspective: 1000px; }
.flash-card { min-height: 200px; border-radius: 20px; background: var(--surface); border: 1px solid var(--line); display: grid; place-items: center; text-align: center; padding: 28px; cursor: pointer; font-size: 22px; line-height: 1.35; }
.flash-card .back { font-family: var(--serif); font-style: italic; font-size: 26px; }

/* modal */
dialog.modal { border: 0; padding: 0; border-radius: 24px; background: var(--surface); color: var(--ink); width: min(520px, 100% - 24px); max-height: calc(100svh - 24px); box-shadow: 0 30px 80px -20px rgba(0,0,0,.45); }
dialog.modal::backdrop { background: rgba(9, 20, 16, .55); backdrop-filter: blur(3px); }
dialog.modal[open] { animation: rise .35s var(--ease-out) both; }
.modal-in { padding: 30px 28px 26px; overflow: auto; }
.modal-in h2 { margin: 0 0 8px; font-size: 28px; letter-spacing: -.035em; line-height: 1.08; }
.modal-x { position: absolute; top: 14px; right: 14px; width: 40px; height: 40px; border-radius: 50%; border: 0; background: var(--surface-2); cursor: pointer; font-size: 18px; }
.seg { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.seg label { display: flex; gap: 10px; align-items: flex-start; padding: 12px; border: 1.5px solid var(--line); border-radius: 12px; cursor: pointer; font-size: 14.5px; line-height: 1.3; }
.seg input { margin-top: 2px; accent-color: var(--ink); }
.seg label:has(input:checked) { border-color: var(--ink); background: var(--surface-2); }
.seg b { display: block; font-size: 15px; }
.fine { font-size: 13px; color: var(--ink-3); margin-top: 14px; line-height: 1.5; }
.hp { position: absolute; left: -9999px; }
.done-mark { width: 64px; height: 64px; border-radius: 50%; background: var(--accent); display: grid; place-items: center; font-size: 30px; color: var(--accent-ink); margin-bottom: 18px; }

/* toast */
.toast { position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); background: var(--ink); color: var(--bg); padding: 12px 18px; border-radius: 12px; font-size: 15px; z-index: 50; animation: rise .3s var(--ease-out) both; max-width: calc(100% - 32px); }

/* prose (privacy) */
.prose { max-width: 760px; }
.prose h1 { font-size: 40px; letter-spacing: -.04em; line-height: 1.05; }
.prose h2 { font-size: 22px; margin-top: 36px; }
.prose p, .prose li { color: var(--ink-2); }

.sticky-cta { display: none; }
@media (max-width: 760px) {
  .sticky-cta { display: flex; position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 15; transform: translateY(140%); transition: transform .3s var(--ease-out); }
  .sticky-cta.show { transform: none; }
  .sticky-cta .btn { width: 100%; box-shadow: 0 10px 30px -10px rgba(0,0,0,.4); }
}

/* NMT answer sheet */
.gapno { display: inline-grid; place-items: center; min-width: 26px; height: 22px; padding: 0 6px; border-radius: 6px; background: var(--ink); color: var(--bg); font: 700 12px/1 var(--sans); font-style: normal; vertical-align: 2px; }
.nmt-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.nmt-grid .text-block.nmt-small { max-height: none; font-size: 16px; padding: 14px 16px; margin-bottom: 10px; }
.nmt-opts { font-size: 15.5px; margin: 0 0 14px; }
.nmt-opts p { margin: 0 0 8px; }
.nmt-opts b, .nmt-o b, .cloze-row b { display: inline-grid; place-items: center; width: 24px; height: 24px; border-radius: 6px; background: var(--surface-2); font-size: 12px; margin-right: 6px; }
@media (max-width: 760px) { .nmt-grid { grid-template-columns: 1fr; } }
.nmt-q { margin: 16px 0; }
.nmt-o { margin: 0 0 6px; font-size: 16px; }
.cloze-row { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: 16px; margin-bottom: 6px; }
.sheets { display: grid; gap: 8px; }
.sheet { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.sheet-n { font-weight: 700; min-width: 34px; font-variant-numeric: tabular-nums; }
.sheet-b { width: 40px; height: 40px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font-weight: 700; }
.sheet-b.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.sheet-b.good { background: var(--good); color: #fff; border-color: var(--good); }
.sheet-b.bad { background: var(--bad); color: #fff; border-color: var(--bad); }
.nmt-task h3 { margin: 10px 0 10px; font-size: 20px; letter-spacing: -.02em; }

/* goals bento (4 cells, asymmetric) */
.goals { display: grid; grid-template-columns: 1.3fr 1fr 1fr; grid-template-rows: auto auto; gap: 14px; }
.goal { border-radius: var(--r-card); padding: 28px; display: flex; flex-direction: column; justify-content: flex-end; min-height: 230px; border: 1px solid var(--line); }
.goal h3 { margin: 18px 0 4px; font-size: 20px; letter-spacing: -.02em; }
.goal p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
.goal .g-en { font-family: var(--serif); font-style: italic; font-size: clamp(22px, 2.4vw, 32px); line-height: 1.15; color: var(--ink); margin-bottom: auto; letter-spacing: -.01em; padding-bottom: .1em; }
.goal.g1 { grid-row: span 2; background: var(--ink); color: var(--bg); border-color: var(--ink); }
.goal.g1 .g-en { color: var(--accent); font-size: clamp(30px, 3.4vw, 46px); }
.goal.g1 p { color: color-mix(in srgb, var(--bg) 72%, transparent); }
.goal.g2 { background: var(--accent-soft); }
.goal.g3 { background: var(--surface); }
.goal.g4 { grid-column: span 2; background: var(--surface-2); }
@media (max-width: 860px) { .goals { grid-template-columns: 1fr; } .goal.g1, .goal.g4 { grid-row: auto; grid-column: auto; } .goal { min-height: 0; } .goal .g-en { margin-bottom: 24px; } }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .goal.g1 { background: var(--surface-2); color: var(--ink); border-color: var(--line); } :root:not([data-theme="light"]) .goal.g1 p { color: var(--ink-2); } }
@media (max-width: 560px) { .nav a:not(.btn) { display: none; } .logo small { display: none; } .nav .btn.sm { padding: 0 14px; } .top .wrap { gap: 10px; } }