:root{--bg: #ffffff;--surface: #ffffff;--text: #3c3c3c;--muted: #777777;--line: #e5e5e5;--line-dark: #cecece;--green: #58cc02;--green-dark: #58a700;--green-bg: #d7ffb8;--red: #ff4b4b;--red-dark: #ea2b2b;--red-bg: #ffdfe0;--blue: #1cb0f6;--blue-dark: #1899d6;--blue-bg: #ddf4ff;--gold: #ffc800;--gold-dark: #e5a000;--lux-red: #ef3340;--lux-blue: #00a1de;color-scheme:light}@media (prefers-color-scheme: dark){:root{--bg: #131f24;--surface: #1a2a32;--text: #f1f7fb;--muted: #8fa4ad;--line: #37464f;--line-dark: #263238;--green-bg: #1f3a12;--red-bg: #3d1d1f;--blue-bg: #13394d;color-scheme:dark}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Nunito,system-ui,sans-serif;font-weight:600}button{font:inherit;color:inherit;cursor:pointer}button:disabled{cursor:default}h1,h2,h3{font-weight:800}.btn{border:none;border-radius:16px;padding:12px 22px;font-weight:800;text-transform:uppercase;letter-spacing:.04em;font-size:15px;transition:transform .05s,filter .15s}.btn:active:not(:disabled){transform:translateY(3px);box-shadow:none!important}.btn.primary{background:var(--green);color:#fff;box-shadow:0 4px 0 var(--green-dark)}.btn.danger{background:var(--red);color:#fff;box-shadow:0 4px 0 var(--red-dark)}.btn.ghost{background:var(--surface);border:2px solid var(--line);box-shadow:0 3px 0 var(--line);font-size:13px;padding:8px 14px}.btn:disabled{background:var(--line)!important;color:var(--muted)!important;box-shadow:none!important}.btn.wide{width:100%;max-width:320px}.icon-btn{background:none;border:none;font-size:20px;padding:6px;color:var(--muted);border-radius:10px}.icon-btn:hover{background:var(--line)}.home{max-width:640px;margin:0 auto;padding:0 16px 120px}.topbar{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px 0;background:var(--bg);border-bottom:2px solid var(--line)}.logo{font-weight:900;font-size:22px;color:var(--lux-red);white-space:nowrap}.logo-lion{font-size:24px}.topbar-stats{display:flex;align-items:center;gap:6px}.chip{display:inline-flex;align-items:center;gap:4px;font-weight:800;padding:4px 8px;border-radius:10px;white-space:nowrap}.chip.fire{color:#ff9600}.chip.muted{color:var(--muted)}.chip.xp{color:var(--gold-dark)}.chip.goal{color:var(--green-dark)}.ring{width:16px;height:16px;border-radius:50%;background:conic-gradient(var(--green) var(--pct),var(--line) 0)}.tabs{display:flex;gap:8px;margin:16px 0}.tabs button{flex:1;padding:10px;border-radius:12px;border:2px solid var(--line);background:var(--surface);font-weight:800}.tabs button.active{border-color:var(--blue);background:var(--blue-bg);color:var(--blue-dark)}.unit{margin-bottom:40px}.unit-header{background:var(--unit);color:#fff;border-radius:16px;padding:16px 18px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;box-shadow:0 4px #0000002e}.unit-header.locked{filter:grayscale(.85) opacity(.75)}.unit-kicker{font-size:13px;text-transform:uppercase;opacity:.85;font-weight:800}.unit-title{font-size:22px;font-weight:900}.unit-sub{opacity:.95}.unit-actions{display:flex;flex-direction:column;gap:8px}.unit-header .btn.ghost{background:#ffffff26;border-color:#ffffff73;box-shadow:0 3px #00000026;color:#fff}.nodes{display:flex;flex-direction:column;align-items:center;gap:36px;padding-top:48px}.node-wrap{position:relative}.node{width:72px;height:64px;border-radius:50%;border:none;font-size:28px;font-weight:900;color:#fff;background:var(--unit);box-shadow:0 7px #00000038;transition:transform .05s}.node:active{transform:translateY(5px);box-shadow:0 2px #00000038}.node.done{background:var(--gold);box-shadow:0 7px 0 var(--gold-dark)}.node.locked{background:var(--line);color:var(--muted);box-shadow:0 7px 0 var(--line-dark)}.node.current{outline:6px solid color-mix(in srgb,var(--unit) 30%,transparent);outline-offset:4px}.start-bubble{position:absolute;bottom:calc(100% + 6px);left:50%;transform:translate(-50%);background:var(--surface);border:2px solid var(--line);color:var(--unit);font-weight:900;padding:3px 10px;font-size:13px;border-radius:10px;white-space:nowrap;animation:bob 1.2s ease-in-out infinite;z-index:1}@keyframes bob{50%{transform:translate(-50%,-5px)}}.path-end{text-align:center;color:var(--muted);font-weight:800;padding:20px 0}.practice-fab{position:fixed;right:max(16px,calc(50vw - 304px));bottom:20px;background:var(--blue);color:#fff;box-shadow:0 4px 0 var(--blue-dark);z-index:6}.words section{margin-bottom:24px}.word-row{display:grid;grid-template-columns:1fr 1fr auto;gap:12px;padding:10px 4px;border-bottom:2px solid var(--line);align-items:center}.word-lb{font-weight:800}.word-ru{color:var(--muted)}.strength{display:inline-flex;gap:3px;align-items:flex-end}.strength i{width:6px;border-radius:2px;background:var(--line)}.strength i:nth-child(1){height:6px}.strength i:nth-child(2){height:10px}.strength i:nth-child(3){height:14px}.strength i:nth-child(4){height:18px}.strength i.on.s1{background:var(--red)}.strength i.on.s2{background:#ff9600}.strength i.on.s3,.strength i.on.s4{background:var(--green)}.empty{text-align:center;color:var(--muted);padding:40px 0}.toast{position:fixed;left:50%;bottom:84px;transform:translate(-50%);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:12px;font-weight:800;z-index:20}.modal-back{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:center;justify-content:center;padding:16px;z-index:30}.modal{background:var(--surface);border-radius:20px;max-width:560px;width:100%;max-height:85vh;overflow:auto;padding:20px 22px;border-top:8px solid var(--unit, var(--blue))}.modal-head{display:flex;justify-content:space-between;align-items:center}.modal-head h2{margin:0}.tip h3{color:var(--unit);margin-bottom:6px}.tip p{line-height:1.5;margin-top:0}.example{display:flex;justify-content:space-between;gap:12px;border:2px solid var(--line);border-radius:12px;padding:8px 12px;margin-bottom:6px}.example span:first-child{font-weight:800;color:var(--blue-dark)}.example span:last-child{color:var(--muted);text-align:right}.goal-options{display:flex;gap:8px}.confirm-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.lesson{min-height:100vh;display:flex;flex-direction:column}.lesson-top{display:flex;align-items:center;gap:14px;max-width:1000px;width:100%;margin:0 auto;padding:20px 16px}.bar{flex:1;height:16px;background:var(--line);border-radius:8px;overflow:hidden}.bar-fill{height:100%;background:var(--green);border-radius:8px;transition:width .3s ease;box-shadow:inset 0 -4px #ffffff40}.combo{font-weight:900;color:var(--muted);min-width:48px;text-align:right}.combo.hot{color:#ff9600}.lesson-body{flex:1;width:100%;max-width:620px;margin:0 auto;padding:12px 16px 24px;animation:slide-in .2s ease-out}@keyframes slide-in{0%{opacity:0;transform:translate(16px)}}.lesson-body h2{font-size:26px;margin:8px 0 20px}.retry-badge,.badge{display:inline-block;font-weight:900;text-transform:uppercase;font-size:13px;letter-spacing:.05em;color:#ff9600;margin-bottom:4px}.badge{color:#ce82ff}.prompt{font-size:22px;border:2px solid var(--line);border-radius:16px;padding:14px 18px;margin-bottom:24px;display:inline-block}.prompt-lb{color:var(--blue-dark);font-weight:800}.options{display:grid;gap:10px}.options.row{grid-template-columns:repeat(auto-fit,minmax(140px,1fr))}.option{display:flex;align-items:center;gap:12px;text-align:left;font-size:18px;padding:14px 16px;border-radius:14px;border:2px solid var(--line);background:var(--surface);box-shadow:0 4px 0 var(--line)}.option:hover:not(:disabled){background:color-mix(in srgb,var(--line) 35%,var(--surface))}.option.selected{border-color:var(--blue);background:var(--blue-bg);color:var(--blue-dark);box-shadow:0 4px 0 var(--blue)}.kbd{display:inline-grid;place-items:center;width:26px;height:26px;border:2px solid var(--line);border-radius:8px;font-size:13px;color:var(--muted);flex:none}.option.selected .kbd{border-color:var(--blue);color:var(--blue-dark)}.gw{position:relative;cursor:help;border-bottom:2px dotted currentColor;border-bottom-color:color-mix(in srgb,currentColor 45%,transparent)}.gpop{display:none;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);width:max-content;max-width:240px;background:var(--surface);color:var(--text);border:2px solid var(--line);border-radius:10px;padding:6px 10px;font-size:15px;font-weight:700;line-height:1.3;text-align:center;box-shadow:0 4px 12px #0000001f;z-index:10;pointer-events:none}.gw:hover .gpop,.gw.open .gpop{display:block}.intro{text-align:center;padding-top:40px}.intro-word{font-size:44px;font-weight:900;color:var(--blue-dark);margin:12px 0}.intro-word.phrase{font-size:32px}.intro-ru{font-size:24px}.intro-note{color:var(--muted);margin-top:16px}.fill-ru{color:var(--muted);margin-bottom:10px}.fill-sentence{font-size:26px;font-weight:800;margin-bottom:28px;line-height:1.8}.blank{display:inline-block;min-width:90px;border-bottom:3px solid var(--line-dark);text-align:center;padding:0 6px}.blank.filled{color:var(--blue-dark);border-color:var(--blue)}.tile-answer{min-height:64px;border-top:2px solid var(--line);border-bottom:2px solid var(--line);padding:10px 0;display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;align-content:flex-start}.tile-bank{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.tile{border:2px solid var(--line);background:var(--surface);border-radius:12px;padding:8px 14px;font-size:18px;box-shadow:0 3px 0 var(--line)}.tile.ghost{background:var(--line);color:transparent;box-shadow:none}.tile.small{font-size:16px;padding:4px 12px}.type-input{width:100%;font:inherit;font-size:20px;padding:14px 16px;border-radius:14px;border:2px solid var(--line);background:color-mix(in srgb,var(--line) 30%,var(--surface));color:var(--text);outline:none}.type-input:focus{border-color:var(--blue)}.special-chars{display:flex;gap:8px;margin-top:12px}.match{display:grid;grid-template-columns:1fr 1fr;gap:12px}.match-col{display:grid;gap:10px}.match-cell{justify-content:center;text-align:center;font-size:17px;transition:opacity .25s}.match-cell.matched{opacity:.35;border-color:var(--green);color:var(--green-dark);box-shadow:none}.match-cell.wrong{border-color:var(--red);background:var(--red-bg);color:var(--red-dark);box-shadow:0 4px 0 var(--red);animation:shake .3s}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}.lesson-foot{border-top:2px solid var(--line);padding:18px 16px 10px}.lesson-foot.ok{background:var(--green-bg);border-color:transparent}.lesson-foot.bad{background:var(--red-bg);border-color:transparent}.foot-inner{max-width:1000px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.foot-inner>.btn:only-child{margin-left:auto}.feedback-title{font-size:22px;font-weight:900}.ok .feedback-title{color:var(--green-dark)}.bad .feedback-title,.bad .feedback-answer{color:var(--red-dark)}.feedback-answer{font-size:18px;font-weight:700}.feedback-note{color:var(--muted);margin-top:4px}.foot-hint{max-width:1000px;margin:8px auto 0;font-size:12px;color:var(--muted)}.lesson-end{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:16px;text-align:center}.end-mascot{font-size:96px}.lesson-end h1{color:var(--gold-dark);font-size:30px;margin:0}.end-stats{display:flex;gap:12px;margin-bottom:20px;flex-wrap:wrap;justify-content:center}.stat{border:2px solid;border-radius:14px;min-width:100px;overflow:hidden}.stat-label{color:#fff;font-weight:900;font-size:13px;text-transform:uppercase;padding:4px 8px}.stat-value{font-size:22px;font-weight:900;padding:10px 8px}@media (max-width: 480px){.logo{font-size:0}.lesson-body h2{font-size:21px}.foot-inner .btn.wide{max-width:none}}