:root{--bg: #0b0b12;--bg-elev: #14141f;--bg-elev-2: #1c1c2b;--line: #2a2a3d;--ink: #f2f2f7;--ink-dim: #a2a2b8;--ink-faint: #6c6c85;--indigo: #6366f1;--indigo-bright: #818cf8;--good: #34d399;--hard: #fbbf24;--again: #f87171;--radius: 18px;--radius-sm: 12px;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Hiragino Sans,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none}#root{display:flex;flex-direction:column}.app{width:100%;max-width:480px;margin:0 auto;padding:max(20px,env(safe-area-inset-top)) 20px calc(28px + env(safe-area-inset-bottom));flex:1;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.brand{display:flex;align-items:center;gap:10px;font-weight:700;letter-spacing:.2px}.brand .mark{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--indigo),var(--indigo-bright));display:grid;place-items:center;color:#fff;font-size:15px;font-weight:800}.topbar .actions{display:flex;gap:8px}button{font:inherit;cursor:pointer;border:none;color:inherit;background:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 20px;border-radius:var(--radius-sm);font-weight:650;background:var(--bg-elev-2);border:1px solid var(--line);color:var(--ink);transition:transform .08s ease,background .15s ease}.btn:active{transform:scale(.98)}.btn.primary{background:linear-gradient(135deg,var(--indigo),var(--indigo-bright));border:none;color:#fff;font-size:17px;padding:18px 20px;box-shadow:0 8px 24px -8px #6366f1b3}.btn.ghost{background:transparent}.btn.block{width:100%}.iconbtn{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:var(--bg-elev);border:1px solid var(--line);font-size:17px}.card{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.section-title{font-size:12px;text-transform:uppercase;letter-spacing:.8px;color:var(--ink-faint);margin:24px 4px 10px;font-weight:700}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.stat{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius-sm);padding:14px 12px;text-align:center}.stat .val{font-size:26px;font-weight:800;letter-spacing:-.5px}.stat .lbl{font-size:11px;color:var(--ink-dim);margin-top:3px}.meter{margin-top:12px}.meter+.meter{margin-top:14px}.meter .head{display:flex;justify-content:space-between;font-size:13px;color:var(--ink-dim);margin-bottom:6px}.meter .track{height:8px;border-radius:99px;background:var(--bg-elev-2);overflow:hidden}.meter .fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--indigo),var(--indigo-bright))}.meter .fill.green{background:linear-gradient(90deg,#10b981,var(--good))}.quiz{flex:1;display:flex;flex-direction:column}.quiz-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}.pill{font-size:13px;color:var(--ink-dim);font-variant-numeric:tabular-nums}.qbar{flex:1;height:6px;border-radius:99px;background:var(--bg-elev-2);overflow:hidden}.qbar .fill{height:100%;background:linear-gradient(90deg,var(--indigo),var(--indigo-bright));transition:width .25s ease}.card-stage{flex:1;display:flex;align-items:center;justify-content:center;perspective:1400px;touch-action:none;user-select:none;-webkit-user-select:none}.flashcard{position:relative;width:100%;min-height:340px;transition:transform .45s cubic-bezier(.2,.7,.2,1);transform-style:preserve-3d;will-change:transform}.face{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:22px;border:1px solid var(--line);background:linear-gradient(160deg,var(--bg-elev),var(--bg-elev-2));padding:28px 24px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;box-shadow:0 20px 50px -24px #000c}.face.back{transform:rotateY(180deg)}.face .kicker{position:absolute;top:16px;left:20px;font-size:11px;letter-spacing:.8px;text-transform:uppercase;color:var(--ink-faint);font-weight:700}.face .prompt{font-size:26px;font-weight:700;line-height:1.35}.face .ru{font-size:27px;font-weight:700;line-height:1.35}.face .kana{margin-top:12px;font-size:15px;color:var(--indigo-bright)}.face .ja{margin-top:8px;font-size:15px;color:var(--ink-dim)}.face .note{margin-top:14px;font-size:12px;color:var(--ink-faint);line-height:1.5}.face .hint{position:absolute;bottom:18px;font-size:13px;color:var(--ink-faint)}.overlay-label{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:20px;font-weight:800;letter-spacing:1px;padding:8px 16px;border-radius:10px;border:2px solid currentColor;opacity:0;pointer-events:none}.card.calib-cta{display:block;width:100%;text-align:left;margin-top:0;transition:transform .08s ease}.card.calib-cta:active{transform:scale(.99)}.flashcard.calib{min-height:300px}.face .speaker{position:absolute;top:14px;right:14px;width:36px;height:36px;font-size:16px}.calib-gloss{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);width:100%}.calib-gloss .g-ru{font-size:17px;color:var(--ink);line-height:1.4}.calib-gloss .ja{margin-top:6px;font-size:14px;color:var(--ink-dim)}.legend{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:18px}.legend.two{grid-template-columns:repeat(2,1fr)}.legend .chip{padding:11px 8px;border-radius:var(--radius-sm);text-align:center;font-size:13px;font-weight:700;border:1px solid var(--line);background:var(--bg-elev);color:var(--ink-dim);transition:all .12s ease}.legend .chip .dir{display:block;font-size:11px;color:var(--ink-faint);font-weight:600;margin-top:2px}.legend .chip.again.hot{color:#fff;background:color-mix(in srgb,var(--again) 30%,var(--bg-elev));border-color:var(--again)}.legend .chip.hard.hot{color:#fff;background:color-mix(in srgb,var(--hard) 30%,var(--bg-elev));border-color:var(--hard)}.legend .chip.good.hot{color:#fff;background:color-mix(in srgb,var(--good) 30%,var(--bg-elev));border-color:var(--good)}.legend.locked{opacity:.45}.quiz-foot{margin-top:16px;display:flex;justify-content:center;min-height:24px}.linkbtn{color:var(--indigo-bright);font-weight:600;font-size:14px;padding:6px 10px}.linkbtn:disabled{color:var(--ink-faint);cursor:default}.center-screen{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:8px}.big-emoji{font-size:52px}.center-screen h1{font-size:24px;margin:6px 0 2px}.center-screen p{color:var(--ink-dim);margin:0;line-height:1.5}.done-stats{display:flex;gap:22px;margin:20px 0 26px}.done-stats .val{font-size:24px;font-weight:800}.done-stats .lbl{font-size:12px;color:var(--ink-dim)}.list{display:flex;flex-direction:column;gap:1px;background:var(--line);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}.row{background:var(--bg-elev);padding:15px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.row .label{font-weight:600}.row .sub{font-size:12px;color:var(--ink-dim);margin-top:3px}.seg{display:inline-flex;background:var(--bg-elev-2);border-radius:10px;padding:3px;gap:3px}.seg button{padding:7px 12px;border-radius:8px;font-size:14px;color:var(--ink-dim);font-weight:600}.seg button.on{background:var(--indigo);color:#fff}.seg button:disabled{color:var(--ink-faint);cursor:default}.badge{font-size:10px;padding:2px 6px;border-radius:6px;background:var(--bg-elev-2);color:var(--ink-faint);border:1px solid var(--line);margin-left:6px}.steps{counter-reset:step;display:flex;flex-direction:column;gap:12px}.step{display:flex;gap:14px;align-items:flex-start}.step .num{flex:none;width:26px;height:26px;border-radius:50%;background:var(--indigo);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800}.step .body{font-size:15px;line-height:1.5;padding-top:2px}.step .body code,.urlbox{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;background:var(--bg-elev-2);padding:2px 6px;border-radius:6px;word-break:break-all}.urlbox{display:block;padding:12px 14px;margin-top:10px;border:1px solid var(--line)}.muted{color:var(--ink-dim);font-size:13px;line-height:1.6}.spacer{flex:1}.stack{display:flex;flex-direction:column;gap:12px;margin-top:14px}.backlink{color:var(--indigo-bright);font-weight:600;font-size:15px;padding:4px 0;align-self:flex-start}