:root {
  --ink: #284f4c;
  --muted: #70847e;
  --paper: #fffdf7;
  --line: #ddd2b3;
  --yellow: #f4bb42;
  --purple: #8071b8;
  --blue: #55a8cb;
  --green: #55aa80;
  --green-dark: #2d765b;
  --coral: #ed7267;
  --water: #63b7d8;
  --shadow: 0 18px 36px rgba(53, 79, 68, .14), 0 8px 0 rgba(145, 126, 79, .16);
}
* { box-sizing: border-box; }
html { min-width: 320px; }
body { min-width: 320px; margin: 0; overflow-x: hidden; background: #f4f1df; color: var(--ink); font-family: "Trebuchet MS", "Arial Rounded MT Bold", Arial, sans-serif; }
.background { position: fixed; inset: 0; z-index: -1; background: radial-gradient(circle at 12% 16%, rgba(255,255,255,.8) 0 3px, transparent 4px) 0 0/46px 46px, radial-gradient(circle at 88% 18%, rgba(91,169,207,.18), transparent 33%), linear-gradient(135deg,#fff5d6,#edf2df 55%,#e6f0e8); }
button { font: inherit; color: inherit; }
button:focus-visible { outline: 4px solid rgba(244,187,66,.68); outline-offset: 3px; }
.app { width: min(1120px, calc(100% - 32px)); min-height: 100vh; margin: 0 auto; padding: 22px 0 52px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.brand, .top-button { min-height: 52px; border: 2px solid var(--line); border-radius: 18px; background: #fffdf8; box-shadow: 0 5px 0 rgba(145,126,79,.16); cursor: pointer; }
.brand:hover, .top-button:hover { transform: translateY(-1px); border-color: #c9bd9b; }
.brand:active, .top-button:active { transform: translateY(3px); box-shadow: 0 2px 0 rgba(145,126,79,.16); }
.brand { display: flex; align-items: center; gap: 10px; padding: 5px 15px 5px 7px; text-align: left; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; background: linear-gradient(145deg,#ffe080,var(--yellow)); font-size: 23px; }
.brand b, .brand small { display: block; }
.brand b { font-size: 17px; }
.brand small { color: var(--muted); font-size: 11px; }
.top-actions { display: flex; gap: 9px; }
.top-button { padding: 0 16px; font-weight: 900; }
.paper { border: 2px solid var(--line); border-radius: 40px; background: var(--paper); box-shadow: var(--shadow); }
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(400px, .95fr); min-height: 520px; overflow: hidden; }
.hero-copy { z-index: 2; padding: 48px 30px 38px 52px; }
.eyebrow { margin: 0 0 13px; color: #a06c20; font-size: 13px; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2, h3 { margin: 0; }
.hero h1, .labs h2, .result h1, .album h1 { font-family: Georgia, "Times New Roman", serif; }
.hero h1 { max-width: 600px; font-size: clamp(44px, 4.9vw, 62px); line-height: .98; letter-spacing: -.045em; overflow-wrap: normal; }
.lead { max-width: 570px; margin: 22px 0 25px; color: var(--muted); font-size: 18px; line-height: 1.5; }
.hero-actions, .actions, .result-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.primary, .secondary, .hint { min-height: 55px; padding: 0 23px; border-radius: 17px; font-weight: 900; cursor: pointer; }
.primary { border: 0; background: var(--green); color: #fff; box-shadow: 0 7px 0 var(--green-dark); }
.primary:hover:not(:disabled) { transform: translateY(-1px); background: #66b98f; }
.primary:active:not(:disabled) { transform: translateY(5px); box-shadow: 0 2px 0 var(--green-dark); }
.secondary, .hint { border: 2px solid var(--line); background: #fffaf0; box-shadow: 0 5px 0 rgba(145,126,79,.15); }
.secondary:hover, .hint:hover { transform: translateY(-1px); border-color: #c9bd9b; }
.secondary:active, .hint:active { transform: translateY(3px); box-shadow: 0 2px 0 rgba(145,126,79,.15); }
.hint { background: #fff1bd; border-color: #e3c35f; }
.hero-facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin-top: 32px; }
.hero-facts div { min-width: 0; padding: 10px; border: 2px solid #d9d5b8; border-radius: 17px; background: #f5f8e9; }
.hero-facts b { color: var(--purple); font-size: 22px; }
.hero-facts span { display: block; margin-top: 2px; color: var(--muted); font-size: 11px; }
.hero-visual { position: relative; min-height: 520px; overflow: hidden; background: linear-gradient(rgba(255,255,255,.36) 1px,transparent 1px), linear-gradient(90deg,rgba(255,255,255,.36) 1px,transparent 1px), #dfeee8; background-size: 30px 30px; }
.hero-visual::after { content: "воздух ↕ вода"; position: absolute; top: 28px; left: 50%; transform: translateX(-50%) rotate(-2deg); padding: 8px 16px; border: 2px solid #d5ccac; border-radius: 13px; background: #fffdf7; color: var(--purple); font-weight: 900; box-shadow: 0 5px 0 rgba(145,126,79,.13); white-space: nowrap; }
.hero-visual .bottle-set { position: absolute; inset: 82px 18px 92px 10px; }
.hero-visual > img { position: absolute; z-index: 3; right: -12px; bottom: -12px; width: 172px; height: 278px; object-fit: contain; filter: drop-shadow(0 9px 7px rgba(43,72,64,.12)); pointer-events: none; }
.safety { display: flex; align-items: center; gap: 14px; width: min(960px, calc(100% - 28px)); margin: 18px auto 0; padding: 16px 21px; border: 2px solid #e1c77d; border-radius: 24px; background: #fff1c0; box-shadow: 0 7px 0 rgba(149,122,45,.13); }
.safety > b { display: grid; place-items: center; flex: 0 0 36px; width: 36px; height: 36px; border-radius: 50%; background: var(--yellow); color: #fff; font-size: 23px; }
.safety p { margin: 0; line-height: 1.42; }
.labs, .album, .result { margin-top: 24px; padding: 38px; }
.labs > p:not(.eyebrow), .album > p, .result > p { max-width: 760px; color: var(--muted); line-height: 1.5; }
.labs h2 { font-size: clamp(38px, 5vw, 58px); }
.lab-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 27px; }
.lab-card { display: flex; min-width: 0; flex-direction: column; padding: 25px 23px 22px; border: 2px solid var(--line); border-radius: 27px; background: #fff8e8; box-shadow: 0 7px 0 rgba(145,126,79,.15); }
.lab-card.sky { background: #eef6f8; }
.lab-card.violet { background: #f1eef8; }
.lab-card > span { display: grid; place-items: center; width: 54px; height: 54px; margin-bottom: 18px; border-radius: 18px; background: var(--yellow); font-family: Georgia, serif; font-size: 27px; font-weight: 900; }
.lab-card.sky > span { background: var(--blue); color: #fff; }
.lab-card.violet > span { background: var(--purple); color: #fff; }
.lab-card h3 { font-size: 25px; }
.lab-card p { flex: 1; color: var(--muted); line-height: 1.45; }
.lab-card small { margin: 13px 0; color: var(--green-dark); font-weight: 900; }
.lab-card .primary { width: 100%; }
.game { padding: 28px; }
.game-head { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; margin-bottom: 20px; }
.progress { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; }
.track { height: 13px; overflow: hidden; margin-top: 8px; border: 2px solid #ced2b3; border-radius: 999px; background: #eef0df; }
.track i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg,var(--yellow),var(--purple)); transition: width .3s; }
.score { padding: 10px 14px; border-radius: 15px; background: #fff1bf; white-space: nowrap; }
.experiment { display: grid; grid-template-columns: minmax(400px,.98fr) minmax(0,1.02fr); gap: 26px; }
.stage { display: flex; min-height: 525px; flex-direction: column; overflow: hidden; border: 2px solid #cfd0b7; border-radius: 31px; background: linear-gradient(rgba(255,255,255,.44) 1px,transparent 1px), linear-gradient(90deg,rgba(255,255,255,.44) 1px,transparent 1px), #e8ead9; background-size: 30px 30px; transition: border-color .25s, box-shadow .25s; }
.stage.solved { border-color: #78be98; box-shadow: inset 0 0 0 4px rgba(85,170,128,.14); }
.stage-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 16px; padding: 10px 13px; border: 2px solid #d7d2b7; border-radius: 16px; background: rgba(255,255,255,.93); }
.stage-head small { max-width: 220px; color: var(--muted); text-align: right; }
.bottle-set { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); align-items: end; gap: 6px; min-height: 305px; padding: 0 12px; }
.bottle-note { position: relative; min-width: 0; padding: 0 2px 8px; border: 0; border-radius: 24px; background: transparent; cursor: pointer; }
.bottle-note:hover:not([tabindex="-1"]) { background: rgba(255,255,255,.72); }
.bottle-note:active:not([tabindex="-1"]), .bottle-note.playing { transform: translateY(3px); }
.bottle-note svg { display: block; width: 100%; height: 260px; overflow: visible; filter: drop-shadow(0 6px 3px rgba(42,78,72,.12)); }
.bottle-note > span { display: block; min-height: 32px; color: var(--ink); font-size: 12px; font-weight: 900; text-align: center; }
.bottle-glass { fill: rgba(250,254,252,.5); stroke: #365b58; stroke-width: 6; stroke-linejoin: round; }
.water { fill: var(--water); opacity: .82; }
.water-line { fill: none; stroke: #318aaf; stroke-width: 4; stroke-linecap: round; }
.shine { fill: none; stroke: rgba(255,255,255,.9); stroke-width: 8; stroke-linecap: round; }
.rim { fill: none; stroke: #365b58; stroke-width: 6; stroke-linecap: round; }
.music-note { opacity: 0; fill: var(--yellow); stroke: #8b6721; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; transition: opacity .2s, transform .2s; transform-origin: center; }
.bottle-note:hover .music-note, .bottle-note.playing .music-note, .stage.solved .music-note, .decorative .music-note { opacity: 1; }
.bottle-note.playing .music-note { transform: translateY(-6px) rotate(5deg); }
.method-legend { display: flex; align-items: center; gap: 12px; margin: auto 16px 16px; padding: 12px 14px; border: 2px solid #d8d2b4; border-radius: 18px; background: #fffdf7; }
.method-legend > span { display: grid; place-items: center; flex: 0 0 42px; width: 42px; height: 42px; border-radius: 14px; background: #e6f4f8; font-size: 23px; }
.method-legend.tap > span { background: #fff0bd; }
.method-legend.compare > span { background: #eeebf7; color: var(--purple); font-weight: 900; }
.method-legend p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.35; }
.method-legend b { display: block; color: var(--ink); }
.question { display: flex; min-width: 0; flex-direction: column; padding: 14px 3px; }
.question h1 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(32px,3.25vw,47px); line-height: 1.07; }
.options { display: grid; grid-template-columns: 1fr; gap: 11px; margin-top: 20px; }
.options button { display: flex; align-items: center; min-height: 78px; padding: 11px 15px; border: 3px solid #d2d5bb; border-radius: 22px; background: #fffaf0; box-shadow: 0 6px 0 rgba(145,126,79,.15); font-weight: 900; cursor: pointer; text-align: left; }
.options button span { display: grid; place-items: center; flex: 0 0 34px; width: 34px; height: 34px; margin-right: 9px; border-radius: 12px; background: #edf5e5; font-size: 20px; }
.options button:hover:not(:disabled) { transform: translateY(-2px); border-color: var(--purple); }
.options button:active:not(:disabled) { transform: translateY(3px); box-shadow: 0 2px 0 rgba(145,126,79,.15); }
.options button.wrong { border-color: var(--coral); background: #fff0ed; }
.options button.correct, .options button.hinted { border-color: var(--green); background: #eaf6ee; }
.feedback { min-height: 84px; margin-top: 15px; padding: 14px 16px; border: 2px solid #d8d7bd; border-radius: 19px; background: #f8f6e9; line-height: 1.4; }
.feedback b { display: block; margin-bottom: 3px; }
.feedback.error { border-color: #efa9a0; background: #fff0ed; }
.feedback.success { border-color: #a6d7bd; background: #e9f6ee; }
.feedback.hint { border-color: #e4c56d; background: #fff4c9; }
.feedback.sound-note { border-color: #a8cedd; background: #edf7fa; }
.actions { align-items: center; margin-top: 15px; }
.actions .primary { margin-left: auto; }
.result { text-align: center; }
.result h1 { font-size: clamp(41px,5vw,61px); }
.stars { margin: 12px 0; color: var(--yellow); font-size: 58px; letter-spacing: 8px; }
.result > p { margin: 0 auto; }
.stats { display: grid; grid-template-columns: repeat(3,minmax(0,190px)); justify-content: center; gap: 12px; margin: 25px auto; }
.stats div { padding: 17px; border: 2px solid var(--line); border-radius: 20px; background: #fffaf0; }
.stats b { display: block; font-size: 31px; }
.stats span { color: var(--muted); font-size: 12px; font-weight: 900; }
.result-actions { justify-content: center; }
.album { margin-top: 0; }
.rule-strip { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; margin-top: 24px; }
.rule-strip div { display: grid; grid-template-columns: 46px 1fr; align-items: center; gap: 2px 10px; padding: 13px 16px; border: 2px solid var(--line); border-radius: 20px; background: #f4f8ed; }
.rule-strip div:nth-child(2) { background: #eef6f8; }
.rule-strip span { grid-row: 1/3; font-size: 29px; }
.rule-strip small { color: var(--muted); }
.album-grid { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; margin-top: 25px; }
.album-card { min-height: 174px; padding: 15px 8px; border: 2px solid var(--line); border-radius: 21px; background: #fffaf0; text-align: center; }
.album-card.locked { opacity: .48; filter: grayscale(.35); }
.album-card > span { display: grid; place-items: center; width: 54px; height: 54px; margin: 0 auto 8px; border-radius: 18px; background: #edf5e5; font-size: 28px; }
.album-card b { display: block; min-height: 50px; font-size: 13px; line-height: 1.25; }
.album-card small { display: block; margin-top: 7px; color: var(--purple); font-size: 11px; font-weight: 900; }
@media (max-width: 930px) {
  .hero { grid-template-columns: minmax(0,1fr) 365px; }
  .experiment { grid-template-columns: 365px minmax(0,1fr); }
  .album-grid { grid-template-columns: repeat(4,1fr); }
  .question h1 { font-size: 36px; }
}
@media (max-width: 760px) {
  .app { width: calc(100% - 20px); padding-top: 10px; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { padding: 37px 27px 31px; }
  .hero-visual { min-height: 430px; }
  .hero-visual .bottle-set { inset: 70px 72px 38px 12px; }
  .hero-visual > img { width: 155px; height: 245px; }
  .lab-grid, .experiment { grid-template-columns: 1fr; }
  .lab-card p { flex: auto; }
  .stage { min-height: 510px; }
  .album-grid { grid-template-columns: repeat(3,1fr); }
  .game-head { grid-template-columns: 1fr; }
  .score { justify-self: start; }
  .question { padding-top: 0; }
  .question h1 { font-size: clamp(34px,7vw,46px); }
}
@media (max-width: 520px) {
  .app { width: calc(100% - 16px); }
  .brand { padding-right: 8px; }
  .brand small { display: none; }
  .brand b { max-width: 150px; font-size: 14px; }
  .top-actions { gap: 6px; }
  .top-button { width: 49px; padding: 0; font-size: 0; }
  .top-button::first-letter { font-size: 20px; }
  .paper { border-radius: 29px; }
  .hero-copy { padding: 31px 20px 25px; }
  .hero h1 { font-size: 38px; }
  .lead { font-size: 16px; }
  .hero-actions > * { width: 100%; }
  .hero-facts { grid-template-columns: repeat(3,1fr); }
  .hero-facts div { padding: 9px 4px; text-align: center; }
  .hero-facts b { font-size: 19px; }
  .hero-visual { min-height: 390px; }
  .hero-visual .bottle-set { inset: 68px 32px 34px 4px; }
  .hero-visual > img { right: -30px; width: 125px; height: 205px; }
  .bottle-note svg { height: 235px; }
  .safety { width: calc(100% - 12px); align-items: flex-start; padding: 14px; font-size: 14px; }
  .labs, .album, .result, .game { padding: 20px 14px; }
  .stage { min-height: 480px; border-radius: 23px; }
  .stage-head { align-items: flex-start; flex-direction: column; }
  .stage-head small { max-width: none; text-align: left; }
  .bottle-set { min-height: 280px; padding: 0 2px; }
  .bottle-note > span { font-size: 11px; }
  .method-legend { margin: auto 9px 9px; padding: 10px; }
  .experiment { gap: 18px; }
  .question h1 { font-size: 34px; }
  .options button { min-height: 84px; padding: 10px 11px; font-size: 14px; }
  .options button span { flex-basis: 30px; width: 30px; height: 30px; margin-right: 7px; }
  .actions { display: grid; grid-template-columns: 1fr 1fr; }
  .actions > * { padding: 0 10px; }
  .actions .primary { grid-column: 1/-1; width: 100%; margin: 0; }
  .stats { grid-template-columns: 1fr; }
  .rule-strip { grid-template-columns: 1fr; }
  .album-grid { grid-template-columns: repeat(2,1fr); gap: 8px; }
  .album-card { min-height: 165px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}