/* Public pages: same palette as the app, light and dark. */
:root {
  --bg: #FAF5EF; --surface: #FFFFFF; --surface-2: #F3EAE1; --ink: #1E1612; --muted: #5E5049; --line: #E3D5C8;
  --accent: #E2502F; --accent-press: #B43A1E; --accent-soft: #FFE2D8; --ok: #1F9461; --ok-soft: #D9F2E4; --bad: #D3333A; --bad-soft: #FCDDDE;
  --font-display: 'M PLUS Rounded 1c', 'Nunito', system-ui, sans-serif; --font-body: 'Golos Text', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --r: 22px; --shadow: 0 1px 2px rgba(60, 35, 20, .07), 0 8px 24px rgba(60, 35, 20, .09);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16110F; --surface: #221B18; --surface-2: #2E2521; --ink: #FFF7F1; --muted: #C9B9AF; --line: #43362F; --accent: #FF7254; --accent-press: #FF9A82; --accent-soft: #4A241B; --ok: #3CC488; --ok-soft: #173A2A; --bad: #FF5C62; --bad-soft: #4A1E21; --shadow: 0 1px 2px rgba(0,0,0,.25), 0 10px 30px rgba(0,0,0,.3); }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 var(--font-body); }
a { color: var(--accent); text-underline-offset: 3px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: clamp(28px, 6vw, 42px); margin-top: .3em; }
h2 { font-size: 22px; }
h3 { font-size: 18px; margin-top: 1.2em; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.top-in { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.top nav { display: flex; gap: 14px; flex: 1; flex-wrap: wrap; font-size: 15px; }
.top nav a { color: var(--ink); text-decoration: none; }
.top nav a:hover { color: var(--accent); }
.brand { display: flex; align-items: center; gap: 8px; font: 800 20px var(--font-display); color: var(--ink); text-decoration: none; }
.mark { background: linear-gradient(135deg, #9BE36D, #3FA34D 70%, #2C7A3A); color: #fff; border-radius: 10px; width: 32px; height: 32px; display: grid; place-items: center; font-size: 18px; }
.crumbs { font-size: 14px; color: var(--muted); margin-top: 18px; }
.crumbs a { color: var(--muted); }
.meta { color: var(--muted); font-size: 15px; }
.lvl { display: inline-block; background: var(--accent); color: #fff; border-radius: 8px; padding: 1px 8px; font: 700 14px var(--font-display); }
.lead { font-size: 18.5px; }
.lead.big { font-size: 21px; }
.muted { color: var(--muted); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; margin: 18px 0; box-shadow: var(--shadow); }
.callout { border-left: 5px solid var(--accent); }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.toc a { background: var(--surface-2); border-radius: 999px; padding: 8px 14px; font-size: 14.5px; color: var(--ink); text-decoration: none; }
.ex { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; border-top: 1px solid var(--line); }
.ex .read { color: #2f8f5b; font-size: .95em; }
.table { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
td, th { text-align: left; padding: 6px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 700; background: var(--surface-2); }
.tables { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 0 16px; }
.tables .card { margin: 8px 0; }
.tables h2 { font-size: 18px; }
.topics, .verbs { list-style: none; padding: 0; margin: 0; }
.topics li { display: flex; flex-direction: column; padding: 10px 0; border-top: 1px solid var(--line); }
.topics li:first-child { border-top: 0; }
.verbs { columns: 2 220px; }
.verbs li { padding: 3px 0; break-inside: avoid; }
.answers li { margin: 10px 0; }
details summary { cursor: pointer; color: var(--accent); font-size: 15px; padding: 8px 0; }
.btn { display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 14px; padding: 12px 20px; font: 700 16px var(--font-body); text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--accent-press); }
.btn.small { padding: 8px 14px; font-size: 14.5px; }
.btn.big { padding: 15px 26px; font-size: 18px; margin: 6px 6px 6px 0; }
.btn.ghost { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
.cta { background: var(--accent-soft); border-radius: var(--r); padding: 20px 22px; margin: 22px 0; display: flex; gap: 16px; align-items: center; flex-wrap: wrap; justify-content: space-between; }
.cta p { margin: 0; flex: 1 1 300px; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 16px; margin-top: 18px; }
.pager a { display: inline-block; padding: 10px 0; }
.pager { display: flex; justify-content: space-between; gap: 12px; margin: 24px 0; flex-wrap: wrap; }
.foot { margin-top: 48px; padding: 34px 0 calc(28px + env(safe-area-inset-bottom)); font-size: 15px; background: #1F3A26; color: #D8E8D9; border-radius: 28px 28px 0 0; }
.foot a { color: #F2FAF2; text-decoration: none; }
.foot a:hover { text-decoration: underline; }
.foot-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 24px; }
.foot .brand { color: #fff; }
.foot-brand p { margin: 10px 0 14px; color: #B9D3BC; line-height: 1.5; }
.foot-brand .btn { background: #4CAF50; color: #fff; }
.foot-col { display: flex; flex-direction: column; gap: 4px; }
.foot-col b { color: #fff; font-family: var(--font-display); margin-bottom: 4px; }
.foot-col a { padding: 5px 0; }
.foot-bottom { margin: 26px 0 0; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.12); font-size: 13.5px; color: #9FBCA3; }
@media (max-width: 760px) {
  .foot-top { grid-template-columns: 1fr 1fr; gap: 20px 16px; }
  .foot-brand { grid-column: 1 / -1; }
  .foot-brand .btn { display: block; text-align: center; }
  .foot-col a { padding: 8px 0; }
}
/* Quiz */
.quiz { margin-top: 12px; }
.q-prompt { font: 700 24px var(--font-display); margin: 10px 0 4px; }
.q-gap { display: inline-block; min-width: 56px; border-bottom: 3px solid var(--accent); text-align: center; color: var(--accent); }
.q-opts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 14px 0; }
.q-opts button { font: 600 17px var(--font-body); padding: 13px; border-radius: 14px; border: 2px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; text-align: left; }
.q-opts button:hover:not(:disabled) { border-color: var(--accent); }
.q-opts button.right { border-color: var(--ok); background: var(--ok-soft); }
.q-opts button.wrong { border-color: var(--bad); background: var(--bad-soft); }
.q-fb { padding: 12px 14px; border-radius: 14px; background: var(--surface-2); margin-bottom: 12px; }
.q-bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.q-bar i { display: block; height: 100%; background: var(--accent); }
.seg { display: flex; gap: 6px; flex-wrap: wrap; }
.seg button { border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 5px 14px; cursor: pointer; font: 600 15px var(--font-body); }
.seg button[aria-pressed="true"] { background: var(--accent); color: #fff; border-color: var(--accent); }
@media (max-width: 520px) { .q-opts { grid-template-columns: minmax(0, 1fr); } .top nav { order: 3; width: 100%; padding-bottom: 8px; } }

.q-end { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 12px; }
.quiz-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.level-pick { font-size: 15px; }
.level-pick summary { list-style: none; color: var(--muted); }
.level-pick summary::-webkit-details-marker { display: none; }
.level-pick summary::after { content: ' ▾'; }
.level-pick[open] .seg { margin-top: 8px; }
/* Tables fit a phone screen: smaller type, tight cells, wrap instead of sideways scrolling. */
@media (max-width: 560px) {
  table { font-size: 14.5px; }
  td, th { padding: 5px 6px; overflow-wrap: anywhere; }
  .card { padding: 16px; }
}

/* Phones: one compact row — logo, «Учить», burger; the sections open as a list under it. */
.burger { display: none; }
@media (max-width: 760px) {
  .top-in { gap: 10px; padding: 8px 16px; flex-wrap: wrap; min-height: 58px; }
  .top-in .btn.small { margin-left: auto; }
  .js .burger { display: grid; gap: 5px; place-content: center; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); cursor: pointer; padding: 0; }
  .burger span { display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--ink); transition: transform .2s, opacity .2s; }
  .menu-open .burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-open .burger span:nth-child(2) { opacity: 0; }
  .menu-open .burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .js .top nav { display: none; }
  .js.menu-open .top nav { display: flex; flex-direction: column; flex: 1 1 100%; order: 3; gap: 0; padding: 4px 0 10px; }
  .js.menu-open .top nav a { padding: 13px 4px; border-top: 1px solid var(--line); font-size: 17px; }
  .top nav { gap: 4px 16px; flex: 1 1 100%; order: 3; }
  .top nav a { display: inline-block; padding: 8px 0; }
}
@media (prefers-reduced-motion: reduce) { .burger span { transition: none; } }
@media (max-width: 560px) {

  .crumbs a { display: inline-block; padding: 6px 0; }
  .seg button { min-height: 40px; }
  .level-pick summary { padding: 8px 0; }
  .btn.big { width: 100%; text-align: center; margin: 6px 0; }
  .lead.big { font-size: 19px; }
}

/* Vocabulary pages */
.words { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; }
.word { display: flex; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line); align-items: flex-start; }
.word:first-child { border-top: 0; }
.word img { flex: none; width: 72px; height: 72px; border-radius: 16px; background: var(--surface-2); }
.word img { object-fit: contain; padding: 6px; }
.word-ex { list-style: none; margin: 6px 0 0; padding: 0; font-size: 15.5px; }
.word-ex li { margin: 4px 0; }
.cols { columns: 2 220px; margin: 0; padding-left: 1.1em; }
.cols li { padding: 4px 0; break-inside: avoid; }
.reading p[lang] { font-size: 18px; }
@media (max-width: 560px) { .word img { width: 56px; height: 56px; } }

/* Word pages */
.word-head { display: flex; gap: 16px; align-items: center; }
.word-head img { flex: none; width: 96px; height: 96px; }
.word-head .lead { margin: 0; }
.letters { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 16px; }
.letters a, .letters b { min-width: 40px; min-height: 40px; display: inline-grid; place-items: center; border-radius: 10px; background: var(--surface, #fff); border: 1px solid var(--line, #e5ddd5); text-decoration: none; font-weight: 700; }
.letters b { background: var(--accent, #E2502F); color: #fff; border-color: transparent; }
@media (max-width: 480px) { .word-head img { width: 72px; height: 72px; } }
[hidden] { display: none !important; }

/* Landing: a bright first screen with a lesson preview, word pictures, numbers and the level path. */
.hero { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: center; margin: 18px -16px 6px; padding: 30px 24px 26px; border-radius: 0 0 32px 32px; overflow: hidden;
  background: radial-gradient(circle at 85% 15%, #FFD9A8 0, transparent 45%), radial-gradient(circle at 10% 90%, #FFC9BC 0, transparent 50%), linear-gradient(160deg, #FFF1E6, #FFE2D8 60%, #FFF6EC); }
@media (prefers-color-scheme: dark) { .hero { background: radial-gradient(circle at 85% 15%, #5A3A1A 0, transparent 45%), radial-gradient(circle at 10% 90%, #4A241B 0, transparent 50%), linear-gradient(160deg, #2A1D17, #3A221B 60%, #241A15); } }
.hero h1 { font-size: clamp(32px, 7.5vw, 50px); margin: .25em 0 .35em; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.kicker { display: inline-block; background: var(--surface); color: var(--accent); border-radius: 999px; padding: 6px 12px; font: 700 13.5px var(--font-body); box-shadow: var(--shadow); }
.hero .lead { font-size: 18px; margin: 0 0 14px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 4px 10px; }
.hero-cta .btn.big { margin: 4px 0; box-shadow: 0 8px 20px rgba(226, 80, 47, .28); }
.hero-cta .btn.ghost { background: var(--surface); box-shadow: none; }
.hero-art { position: relative; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.hero-art .dino { width: min(220px, 60vw); height: auto; filter: drop-shadow(0 12px 18px rgba(60, 35, 20, .18)); animation: bob 3.4s ease-in-out infinite; }
.mock { display: flex; flex-direction: column; gap: 9px; width: min(300px, 100%); background: var(--surface); border-radius: 24px; padding: 16px; box-shadow: 0 2px 4px rgba(60,35,20,.08), 0 18px 40px rgba(60,35,20,.16); transform: rotate(-2deg); }
.mock-top { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.mock-bar { flex: 1; height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; }
.mock-bar i { display: block; width: 62%; height: 100%; background: var(--ok); border-radius: 99px; }
.mock-xp { background: #FFF1C9; color: #8A5A00; border-radius: 99px; padding: 2px 8px; font-weight: 700; }
.mock-label { font-size: 13px; color: var(--muted); }
.mock-q { font: 800 22px var(--font-display); }
.mock-opt { display: flex; justify-content: space-between; border: 2px solid var(--line); border-radius: 14px; padding: 9px 12px; font-size: 15.5px; }
.mock-opt.ok { border-color: var(--ok); background: var(--ok-soft); font-weight: 700; }
.mock-opt.ok span { color: var(--ok); }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 340px; }
.chip { display: inline-flex; align-items: center; gap: 6px; background: var(--surface); border-radius: 999px; padding: 4px 12px 4px 5px; font: 700 14.5px var(--font-body); box-shadow: var(--shadow); }
.chip img { width: 30px; height: 30px; }
.chip:nth-child(odd) { transform: rotate(-3deg); } .chip:nth-child(even) { transform: rotate(2deg); }
@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@media (prefers-reduced-motion: reduce) { .hero-art .dino { animation: none; } }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 18px 0; }
.stats div { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 14px 10px; text-align: center; box-shadow: var(--shadow); }
.stats b { display: block; font: 800 28px var(--font-display); color: var(--accent); line-height: 1.1; }
.stats span { font-size: 13.5px; color: var(--muted); line-height: 1.3; display: block; }
.path .steps { display: flex; gap: 8px; overflow-x: auto; padding: 6px 2px 4px; scroll-snap-type: x mandatory; }
.path .step { flex: 0 0 auto; scroll-snap-align: start; display: flex; flex-direction: column; align-items: center; gap: 6px; min-width: 96px; padding: 12px 8px; border-radius: 16px; background: var(--surface-2); color: var(--ink); text-decoration: none; font-size: 13.5px; text-align: center; }
.path .step:first-child { background: var(--accent-soft); outline: 2px solid var(--accent); }
.path .step .lvl { font-size: 16px; padding: 3px 10px; }
.feature { display: flex; gap: 14px; align-items: flex-start; margin: 8px 0; }
.feature img { width: 52px; height: 52px; flex: 0 0 auto; }
.feature h2 { font-size: 19px; margin-bottom: .3em; }
.feature p { margin: 0; }
.final-cta { text-align: center; background: linear-gradient(160deg, var(--accent-soft), var(--surface)); }
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding: 22px 16px 24px; margin-top: 0; border-radius: 0 0 28px 28px; }
  .hero-cta .btn.big { width: 100%; text-align: center; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .mock { transform: rotate(-1.5deg); }
}