:root{--bg: #eff6ff;--bg-soft: #f8fbff;--surface: #ffffff;--border: #dbeafe;--border-strong: #bfdbfe;--text: #1e293b;--text-soft: #64748b;--text-faint: #94a3b8;--primary: #2563eb;--primary-soft: #dbeafe;--success: #16a34a;--success-soft: #dcfce7;--danger: #dc2626;--danger-soft: #fee2e2;--warning: #d97706;--radius: 14px;--radius-sm: 8px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow: 0 4px 16px rgba(30, 64, 175, .08);--shadow-lg: 0 20px 50px rgba(30, 64, 175, .18);--glass-bg: rgba(255, 255, 255, .52);--glass-bg-strong: rgba(255, 255, 255, .7);--glass-bg-soft: rgba(255, 255, 255, .34);--glass-border: rgba(255, 255, 255, .66);--glass-hairline: rgba(30, 64, 175, .1);--glass-blur: blur(26px) saturate(180%);--glass-blur-sm: blur(14px) saturate(160%);--glass-edge: inset 0 1px 0 rgba(255, 255, 255, .85), inset 0 -1px 0 rgba(15, 23, 42, .05);--glass-shadow: 0 8px 32px rgba(30, 64, 175, .1);--glass-shadow-lift: 0 16px 40px rgba(30, 64, 175, .16);--key-size: 50px;--key-gap: 7px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,Segoe UI,system-ui,-apple-system,sans-serif;background:linear-gradient(180deg,var(--bg) 0%,#f8fafc 60%);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;pointer-events:none;background:radial-gradient(560px 420px at 12% 8%,rgba(96,165,250,.5),transparent 65%),radial-gradient(640px 480px at 88% 12%,rgba(167,139,250,.42),transparent 65%),radial-gradient(700px 520px at 78% 88%,rgba(52,211,238,.38),transparent 65%),radial-gradient(520px 420px at 18% 82%,rgba(244,114,182,.3),transparent 65%)}@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))){:root{--glass-bg: rgba(255, 255, 255, .92);--glass-bg-strong: rgba(255, 255, 255, .96);--glass-bg-soft: rgba(255, 255, 255, .88)}}@media(prefers-reduced-transparency:reduce){:root{--glass-bg: rgba(255, 255, 255, .95);--glass-bg-strong: rgba(255, 255, 255, .98);--glass-blur: none;--glass-blur-sm: none}body:before{display:none}}button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}.app{min-height:100vh;max-width:1440px;margin:0 auto;padding:20px 24px 48px;display:flex;flex-direction:column;gap:18px}.header{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:12px 20px;background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:24px;box-shadow:var(--glass-shadow),var(--glass-edge);position:relative;z-index:40}.header__brand{display:flex;align-items:center;gap:12px}.header__logo{display:grid;place-items:center;width:46px;height:46px;font-size:25px;background:linear-gradient(160deg,#bfdbfecc,#60a5fa73);border:1px solid rgba(255,255,255,.7);border-radius:15px;box-shadow:inset 0 1px #ffffffd9,0 4px 12px #2563eb29}.header__title{font-size:21px;font-weight:800;letter-spacing:-.01em;color:#1e3a8a;line-height:1.2}.header__subtitle{font-size:12.5px;color:var(--text-faint)}.header__nav{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap}.nav-link{position:relative;display:flex;align-items:center;gap:8px;padding:10px 15px;border:1px solid transparent;border-radius:999px;font-size:14.5px;font-weight:600;color:var(--text-soft);text-decoration:none;white-space:nowrap;transition:color .15s ease,background .15s ease,box-shadow .15s ease}.icon{display:block;flex:none}.nav-link__icon{opacity:.85}.nav-link.is-active .nav-link__icon{opacity:1}.nav-link:hover{color:var(--primary);border-color:#ffffff8c;background:#ffffff6b;box-shadow:inset 0 1px #ffffffb3}.nav-link.is-active{color:#fff;font-weight:700;border-color:#ffffffa6;background:linear-gradient(160deg,#3b82f6eb,#2563ebe0);box-shadow:inset 0 1px #ffffff59,0 8px 20px #2563eb52}.header__actions{margin-left:auto;display:flex;align-items:center;gap:12px}.active-profile-card{display:flex;align-items:center;gap:10px;max-width:360px;padding:8px 10px;border:1px solid rgba(255,255,255,.6);border-radius:16px;background:#ffffff6b;-webkit-backdrop-filter:var(--glass-blur-sm);backdrop-filter:var(--glass-blur-sm);box-shadow:inset 0 1px #ffffffb3}.active-profile-card__main{display:flex;align-items:center;min-width:0;gap:8px;color:var(--text);text-align:left}.active-profile-card__main:hover .active-profile-card__copy strong{color:var(--primary)}.active-profile-card__avatar{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:#eef6ff;font-size:21px}.active-profile-card__copy{display:grid;min-width:0;gap:1px}.active-profile-card__copy strong,.active-profile-card__account strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.active-profile-card__copy strong{font-size:13px;font-weight:900}.active-profile-card__copy small,.active-profile-card__account span{color:var(--text-soft);font-size:11px;font-weight:700}.active-profile-card__account{display:grid;min-width:0;gap:3px;padding-left:10px;border-left:1px solid var(--border)}.active-profile-card__account strong{max-width:150px;color:var(--primary);font-size:12px}.active-profile-card__backup{max-width:180px;color:var(--text-muted);font-size:10px;font-weight:800;line-height:1.25}.active-profile-card__actions{display:flex;gap:6px}.active-profile-card__actions button{min-height:26px;padding:4px 8px;border:1px solid var(--border-strong);border-radius:8px;color:var(--primary);background:var(--surface);font-size:11px;font-weight:900}.active-profile-card__actions button:hover{border-color:var(--primary);background:var(--primary-soft)}.active-profile-card__actions button:disabled{cursor:not-allowed;opacity:.55}.active-profile{display:flex;align-items:center;gap:7px;max-width:190px;min-height:38px;padding:6px 10px;border:1px solid var(--border);border-radius:8px;color:var(--text);background:var(--surface-soft)}.active-profile:hover{border-color:var(--primary);background:var(--primary-soft)}.active-profile strong{overflow:hidden;font-size:12.5px;text-overflow:ellipsis;white-space:nowrap}.header__divider{width:1px;height:26px;background:var(--border)}.sound-button,.header-icon-link{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;color:var(--primary);transition:background .15s ease,color .15s ease}.sound-button:hover,.header-icon-link:hover,.header-icon-link.is-active{background:#ffffff80;box-shadow:inset 0 1px #ffffffb3}.sound-button:not(.is-on){color:var(--text-faint)}.account-menu{position:relative}.account-menu__trigger{display:flex;align-items:center;gap:8px;max-width:210px;height:40px;padding:4px 8px 4px 6px;border-radius:12px;color:var(--text);background:transparent;transition:background .15s ease}.account-menu__trigger:hover,.account-menu.is-open .account-menu__trigger{background:#ffffff80;box-shadow:inset 0 1px #ffffffb3}.account-menu__avatar{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;object-fit:cover;background:#eef6ff;font-size:18px}.account-menu__name{max-width:120px;overflow:hidden;color:var(--text);font-size:13.5px;font-weight:800;text-overflow:ellipsis;white-space:nowrap}.account-menu__chevron{color:var(--text-soft);transition:transform .15s ease}.account-menu.is-open .account-menu__chevron{transform:rotate(180deg)}.account-menu__dropdown{position:absolute;top:calc(100% + 8px);right:0;z-index:40;width:268px;padding:8px;border:1px solid var(--border);border-radius:20px;background:#fff;box-shadow:var(--glass-shadow-lift),inset 0 1px #ffffffd9}.account-menu__head{display:flex;align-items:center;gap:10px;padding:6px 8px 12px;border-bottom:1px solid var(--border)}.account-menu__head-avatar{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;object-fit:cover;background:#eef6ff;font-size:22px}.account-menu__head-copy{min-width:0}.account-menu__head-copy strong{display:block;overflow:hidden;color:var(--text);font-size:14px;font-weight:800;text-overflow:ellipsis;white-space:nowrap}.account-menu__head-copy small{display:block;overflow:hidden;color:var(--text-soft);font-size:12px;text-overflow:ellipsis;white-space:nowrap}.account-menu__profiles{display:grid;gap:2px;padding:6px 0;border-bottom:1px solid var(--border)}.account-menu__profile{display:flex;align-items:center;gap:9px;width:100%;padding:7px 8px;border-radius:10px;color:var(--text);background:transparent;text-align:left}.account-menu__profile:hover:not(:disabled){background:var(--primary-soft)}.account-menu__profile.is-active{background:var(--primary-soft)}.account-menu__profile:disabled{cursor:default}.account-menu__profile-avatar{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;object-fit:cover;background:#f1f5f9;font-size:18px}.account-menu__profile strong{overflow:hidden;font-size:13px;font-weight:700;text-overflow:ellipsis;white-space:nowrap}.account-menu__check{margin-left:auto;color:var(--primary)}.account-menu__items{display:grid;gap:2px;padding-top:6px}.account-menu__item{display:flex;align-items:center;gap:10px;width:100%;padding:9px 8px;border-radius:10px;color:var(--text);background:transparent;font-size:13.5px;font-weight:700;text-align:left}.account-menu__item .icon{color:var(--text-faint)}.account-menu__item:hover{background:var(--primary-soft);color:var(--primary)}.account-menu__item:hover .icon{color:var(--primary)}.account-menu__item:disabled{cursor:not-allowed;opacity:.6}.account-menu__item--danger:hover{background:var(--danger-soft);color:var(--danger)}.account-menu__item--danger:hover .icon{color:var(--danger)}.lang-picker{position:relative;display:grid;place-items:center;width:40px;height:40px;padding:0;border-radius:12px;cursor:pointer;transition:background .15s ease}.lang-picker:hover{background:var(--bg)}.lang-picker__select{width:100%;height:100%;padding:0;font-size:0;color:transparent;border:none;background:none;cursor:pointer;outline:none;-webkit-appearance:none;-moz-appearance:none;appearance:none}.lang-picker:before{content:"🇻🇳";position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;pointer-events:none;font-size:18px;line-height:1}.lang-picker--en:before{content:"🇬🇧"}.lang-picker__select option{color:var(--text);font-size:14px;font-weight:600}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.level-progress{align-self:center;display:flex;align-items:center;gap:16px}.level-progress__label{font-size:14px;font-weight:600;color:var(--text-soft);white-space:nowrap}.level-progress__bar{display:flex;gap:2px;width:min(420px,46vw);height:9px;border-radius:999px;overflow:hidden;background:#e2e8f0}.level-progress__step{flex:1;height:100%;padding:0;border-radius:0;background:#e2e8f0;transition:background .2s ease,opacity .2s ease}.level-progress__step:hover:not(:disabled){background:#bfdbfe}.level-progress__step.is-done{background:var(--primary)}.level-progress__step.is-active{background:var(--primary);box-shadow:inset 0 0 0 1px #ffffff80}.level-progress__step.is-locked{cursor:not-allowed;opacity:.7}.main{display:grid;grid-template-columns:minmax(0,1fr);gap:18px;align-items:start}.panel{background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:22px;padding:20px;box-shadow:var(--glass-shadow),var(--glass-edge)}.panel--practice{border-radius:20px;padding:22px 26px;display:flex;flex-direction:column;gap:16px;min-height:300px}.panel--side{display:flex;flex-direction:column;gap:18px}.panel--keyboard{display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;padding:18px 18px 0;background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none;border-color:transparent;box-shadow:none}.lesson-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.lesson-head__title{font-size:18px;font-weight:700}.lesson-head__desc{font-size:13px;color:var(--text-soft);margin-top:3px;max-width:62ch}.badge{padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;white-space:nowrap}.badge--easy{background:var(--success-soft);color:#15803d}.badge--medium{background:#fef3c7;color:var(--warning)}.badge--hard{background:var(--danger-soft);color:var(--danger)}.lesson-subhead{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.display-style{font-size:12px;color:var(--text-faint);white-space:nowrap}.display-style strong{color:var(--text-soft);font-weight:700}.focus-keys{display:flex;align-items:center;gap:7px;flex-wrap:wrap}.focus-keys__label{font-size:12.5px;color:var(--text-soft);font-weight:600}.focus-keys__key{font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:12px;font-weight:700;padding:3px 9px;border-radius:6px;background:var(--bg);border:1px solid var(--border-strong);border-bottom-width:2px;color:var(--primary)}.typing{background:var(--bg-soft);border:1.5px solid var(--border);border-radius:var(--radius);padding:16px 22px;min-height:150px;display:flex;align-items:center;justify-content:center}.typing--idle{flex-direction:column;justify-content:center;text-align:center;gap:10px}.typing__hint{font-size:17px;font-weight:600;color:var(--primary);line-height:1.5}.lesson-progress-strip{display:grid;grid-template-columns:auto minmax(180px,1fr) auto auto;align-items:center;gap:12px 16px;min-height:42px;padding:8px 14px;border:1px solid #dbe7f8;border-radius:8px;background:#ffffffe6;box-shadow:inset 0 1px #ffffffe6,0 1px 2px #0f172a0a}.lesson-progress-strip__label,.lesson-progress-strip__value,.lesson-progress-strip__time{color:var(--text-soft);font-size:13px;font-weight:750;white-space:nowrap}.lesson-progress-strip__label{color:var(--text)}.lesson-progress-strip__track{height:8px;overflow:hidden;border-radius:999px;background:#e4ebf5}.lesson-progress-strip__fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,#2563eb,#3b82f6 55%,#60a5fa);box-shadow:0 0 0 1px #2563eb14,0 4px 10px #2563eb38;transition:width .25s ease}.lesson-progress-strip__time{display:inline-flex;align-items:center;gap:8px}.lesson-progress-strip__time strong{color:var(--text);font-variant-numeric:tabular-nums}.tchar{border-radius:5px;padding-block:2px;transition:background-color .1s ease,color .1s ease}.tchar--done{color:#15803d}.tchar--fixed{color:var(--warning)}.tchar--current{background:var(--primary);color:#fff;box-shadow:0 0 0 3px #2563eb33}.tchar--space{padding-inline:4px}.layout-paragraph .doc{position:relative;width:100%;max-height:calc(30px * 1.9 * 3);overflow:hidden}.layout-paragraph .doc__text{margin:0;font-size:30px;line-height:1.9;font-weight:600;color:var(--text-faint);word-break:normal;overflow-wrap:break-word}.layout-line .lines{position:relative;width:100%;max-height:calc(28px * 2.1 * 3);overflow:hidden;font-size:28px}.layout-line .lines__row{line-height:2.1;font-weight:600;color:var(--text-faint);text-align:center;opacity:.26;transition:opacity .2s ease}.layout-line .lines__row.is-active{opacity:1}.layout-grid .tiles{position:relative;width:100%;max-height:154px;overflow:hidden;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:16px 8px}.tile{flex:0 0 38px;height:38px;border-radius:8px;background:#fff;border:1.5px solid #e2e8f0;box-shadow:inset 0 1px #fffffff2,0 1px 2px #0f172a0f;display:grid;place-items:center;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:20px;font-weight:800;line-height:1.2;color:#020617;-webkit-user-select:none;user-select:none}.tile--current{background:#dbeafe;border-color:#60a5fa;color:#1d4ed8}.tile--done{border-color:#86efac;color:#15803d;background:#f0fdf4}.tile--fixed{border-color:#fcd34d;color:var(--warning);background:#fffbeb}.tile--space{flex-basis:84px}.layout-boxed{--boxed-box: 62px;--boxed-line-h: calc(var(--boxed-box) + 56px)}.layout-boxed .boxed-viewport{position:relative;width:100%;height:var(--boxed-line-h);overflow:hidden}.layout-boxed .boxed-track{display:flex;flex-direction:column;transform:translateY(calc(var(--boxed-line-h) * var(--active-row) * -1));transition:transform .45s cubic-bezier(.4,0,.2,1)}.boxed-line{position:relative;height:var(--boxed-line-h);width:100%;overflow:hidden;opacity:.32;transition:opacity .35s ease}.boxed-line.is-active{opacity:1}.boxed-line.is-done{opacity:0}.boxed-line__inner{position:absolute;left:0;top:0;height:100%;display:flex;align-items:center;gap:8px;transform:translate(0);will-change:transform}.boxed-box{position:relative;flex:0 0 auto;width:var(--boxed-box);height:var(--boxed-box);border-radius:12px;background:#fff;border:1.5px solid #e2e8f0;box-shadow:0 1px 2px #0f172a0f;display:grid;place-items:center;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:calc(var(--boxed-box) * .5);font-weight:800;color:#94a3b8;transition:background-color .12s ease,border-color .12s ease,color .12s ease}.boxed-box__ch{line-height:1.18}.boxed-box.is-current{color:#1e293b;border-color:#bfdbfe}.boxed-box.is-done{background:#dcfce7;border-color:#86efac;color:#16a34a}.boxed-box.is-wrong{background:#fef3c7;border-color:#fcd34d;color:#b45309}.boxed-check{position:absolute;top:calc(var(--boxed-box) * -.42);left:50%;transform:translate(-50%);width:22px;height:22px;fill:none;stroke:#16a34a;stroke-width:3.6;stroke-linecap:round;stroke-linejoin:round}.boxed-underline{position:absolute;bottom:calc(var(--boxed-box) * -.22);left:14%;right:14%;height:4px;border-radius:2px;background:var(--primary);animation:boxed-cursor-pulse 1.1s ease-in-out infinite}.boxed-box.is-wrong .boxed-underline{background:#d97706}.boxed-gap{position:relative;flex:0 0 auto;width:calc(var(--boxed-box) * .42);height:var(--boxed-box)}.boxed-gap .boxed-underline{left:8%;right:8%}.boxed-gap.is-wrong .boxed-underline{background:#d97706}@keyframes boxed-cursor-pulse{0%,to{opacity:1}50%{opacity:.32}}.guidance{text-align:center;font-size:14px;font-weight:600;color:var(--primary);background:var(--primary-soft);padding:9px;border-radius:var(--radius-sm)}.controls{display:flex;gap:10px;justify-content:center}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 22px;border-radius:999px;font-size:14px;font-weight:600;transition:all .15s ease;border:1.5px solid transparent}.btn:disabled{opacity:.45;cursor:not-allowed}.btn--primary{background:linear-gradient(160deg,#3b82f6f5,#2563ebeb);color:#fff;box-shadow:inset 0 1px #ffffff59,0 8px 20px #2563eb52}.btn--primary:hover:not(:disabled){background:linear-gradient(160deg,#2563ebfa,#1d4ed8f2);transform:translateY(-1px)}.btn--ghost{background:#ffffff73;-webkit-backdrop-filter:var(--glass-blur-sm);backdrop-filter:var(--glass-blur-sm);border-color:#ffffffa6;color:var(--text-soft);box-shadow:inset 0 1px #ffffffb3,var(--shadow-sm)}.btn--ghost:hover:not(:disabled){border-color:#2563eb73;background:#ffffffa6;color:var(--primary)}.btn--danger-ghost{background:transparent;border-color:var(--border);color:var(--text-faint);font-size:12.5px;padding:8px}.btn--danger-ghost:hover{border-color:var(--danger);color:var(--danger)}.btn--quiet-danger{min-height:36px;padding:7px 11px;border-color:#e2e8f0;color:#64748b;background:#fff;font-size:12px}.btn--quiet-danger:hover:not(:disabled){border-color:#fca5a5;color:#b91c1c;background:#fff7f7}.ninja-game{--ninja-ink: #15223c;display:grid;gap:10px;width:100%;padding:8px 0 24px}.ninja-game__hud,.ninja-game__footer{display:grid;align-items:center;border:1px solid rgba(125,211,252,.3);border-radius:8px;box-shadow:0 10px 28px #17507724}.ninja-game__hud{grid-template-columns:minmax(150px,1.4fr) repeat(4,minmax(82px,.72fr)) auto;gap:0;overflow:hidden;padding:0;background:linear-gradient(135deg,#172541,#20365a)}.ninja-game__hud div{display:grid;align-content:center;min-height:64px;padding:10px 16px;border-right:1px solid rgba(255,255,255,.09);color:#a8bdd7;font-size:10px;font-weight:800;text-transform:uppercase}.ninja-game__hud strong{color:#fff;font-size:20px;line-height:1.12;text-transform:none}.ninja-game__hud.has-modes{grid-template-columns:minmax(140px,1.2fr) repeat(4,minmax(74px,.6fr)) auto auto}.ninja-game__hud .ninja-modes{display:flex;gap:4px;min-height:0;margin-top:4px;padding:0;border:0}.ninja-modes button{padding:5px 9px;border:1px solid rgba(255,255,255,.18);border-radius:6px;background:#ffffff14;color:#dcecff;cursor:pointer;font-size:12px;font-weight:700}.ninja-modes button.is-on{border-color:#7dd3fc8c;background:#38bdf83d;color:#e0f2fe}.ninja-sound{min-height:38px;margin:0 14px;padding:8px 13px;border:1px solid rgba(255,255,255,.18);border-radius:6px;background:#ffffff14;color:#dcecff;cursor:pointer;font-size:12px;font-weight:700}.ninja-sound.is-on{border-color:#4ade806b;background:#22c55e29;color:#bbf7d0}.ninja-game__footer{grid-template-columns:minmax(130px,.75fr) minmax(220px,1.5fr) minmax(100px,.55fr) minmax(260px,1.3fr);gap:0;overflow:hidden;background:#fffffff2}.ninja-game__footer>span{display:grid;align-content:center;min-height:58px;padding:9px 14px;border-right:1px solid #dbeafe;color:#718096;font-size:10px;font-weight:800;text-transform:uppercase}.ninja-game__footer>span:last-child{border-right:0;color:#52647c;font-size:11px;line-height:1.5;text-align:right;text-transform:none}.ninja-game__footer strong{min-width:0;max-width:100%;overflow:hidden;color:var(--ninja-ink);font-size:15px;line-height:1.28;overflow-wrap:anywhere;text-overflow:ellipsis}.ninja-game__footer>span:nth-child(2) strong{color:#176b8f;font-size:17px}.ninja-sky{position:relative;width:100%;min-height:520px;height:clamp(520px,58vw,690px);overflow:hidden;border:1px solid rgba(14,116,144,.25);border-radius:8px;background:radial-gradient(circle at 50% 110%,rgba(172,231,241,.34),transparent 45%),linear-gradient(180deg,#2486bd,#3d9bc7,#6fc3d5);box-shadow:inset 0 -120px 160px #ffffff17,0 18px 44px #0e749026}.ninja-sky:before,.ninja-sky:after{content:"";position:absolute;left:0;right:0;bottom:-34px;width:180%;height:175px;opacity:.3;background:radial-gradient(ellipse at 5% 92%,#16799f 0 56px,transparent 57px),radial-gradient(ellipse at 17% 86%,#16799f 0 92px,transparent 93px),radial-gradient(ellipse at 34% 92%,#16799f 0 62px,transparent 63px),radial-gradient(ellipse at 49% 82%,#16799f 0 105px,transparent 106px),radial-gradient(ellipse at 68% 90%,#16799f 0 72px,transparent 73px),radial-gradient(ellipse at 84% 80%,#16799f 0 112px,transparent 113px),radial-gradient(ellipse at 97% 90%,#16799f 0 70px,transparent 71px);transform:translate(calc(var(--camera-x, 0) * -.1%));transition:transform .56s cubic-bezier(.22,1,.36,1)}.ninja-sky:after{bottom:-76px;opacity:.16;transform:translate(calc(var(--camera-x, 0) * -.18%)) scaleX(1.08)}.ninja-cloud{position:absolute;z-index:1;width:156px;height:42px;border-radius:999px;background:#bee5ef8c;animation:ninja-cloud-drift 28s linear infinite;filter:drop-shadow(0 3px 0 rgba(17,94,133,.08))}.ninja-cloud:before,.ninja-cloud:after{content:"";position:absolute;bottom:12px;border-radius:50%;background:inherit}.ninja-cloud:before{left:22px;width:54px;height:54px}.ninja-cloud:after{right:18px;width:72px;height:72px}.ninja-cloud--one{top:32px;left:-190px;scale:1.18}.ninja-cloud--two{top:106px;left:18%;scale:.68;animation-duration:34s}.ninja-cloud--three{top:190px;left:62%;scale:.84;animation-duration:38s}.ninja-cloud--four{top:290px;left:8%;scale:.56;animation-duration:44s}.ninja-world{position:absolute;top:0;right:0;bottom:0;left:0;z-index:3;transform:translate(calc(var(--camera-x) * -1%));transition:transform .56s cubic-bezier(.22,1,.36,1)}.ninja-balloon{--balloon-width: 112px;--balloon-height: 132px;--balloon-font: 54px;position:absolute;left:var(--balloon-x);top:var(--balloon-y);width:154px;height:222px;border:0;background:transparent;cursor:default;transform:translate(-50%,-50%);animation:ninja-balloon-float 3.8s ease-in-out infinite;animation-delay:var(--float-delay);transition:left .28s ease,top .28s ease}.ninja-balloon>span{position:relative;z-index:1;display:grid;place-items:center;width:calc(var(--balloon-width) * var(--air-scale));height:calc(var(--balloon-height) * var(--air-scale));margin-inline:auto;padding:18px 12px 24px;border-radius:52% 52% 47% 47%/45% 45% 58% 58%;background:radial-gradient(circle at 72% 20%,rgba(255,255,255,.8),transparent 7%),radial-gradient(circle at 35% 24%,rgba(255,255,255,.46),transparent 26%),linear-gradient(135deg,rgba(255,255,255,.28),transparent 42%),var(--balloon-color);color:#fff;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:calc(var(--balloon-font) * var(--air-scale));font-weight:900;line-height:1;overflow-wrap:anywhere;text-shadow:0 4px 14px rgba(15,23,42,.2);box-shadow:inset -20px -20px 28px #0f172a2b,0 15px 24px #0e4c7433;transition:width .12s linear,height .12s linear,font-size .12s linear,filter .15s ease}.ninja-balloon>span:after{content:"";position:absolute;left:50%;bottom:-7px;width:17px;height:13px;border-radius:2px 2px 5px 5px;background:var(--balloon-color);transform:translate(-50%) rotate(45deg);box-shadow:inset -4px -4px 5px #0f172a26}.ninja-balloon.is-word{--balloon-width: 138px;--balloon-height: 142px;--balloon-font: 25px;width:174px}.ninja-balloon.is-word>span{line-height:1.02;text-align:center}.ninja-balloon.is-phrase{--balloon-width: 178px;--balloon-height: 148px;--balloon-font: 19px;width:210px}.ninja-balloon.is-phrase>span{font-family:inherit;line-height:1.06;padding:20px 18px 25px;text-align:center}.ninja-balloon.is-phrase.is-long{--balloon-width: 190px;--balloon-font: 16px;width:220px}.ninja-balloon i{position:absolute;left:50%;top:calc(var(--balloon-height) - 4px);width:54px;height:58px;transform:translate(-50%);background:linear-gradient(90deg,transparent 0 8px,rgba(120,98,76,.7) 8px 11px,transparent 11px 43px,rgba(120,98,76,.7) 43px 46px,transparent 46px),linear-gradient(180deg,transparent 0 36px,#a98258 36px 41px,transparent 41px),linear-gradient(90deg,transparent 0 13px,#bd8b5e 13px 41px,transparent 41px);clip-path:none}.ninja-balloon i:after{content:"";position:absolute;left:15px;right:15px;bottom:2px;height:6px;border-radius:2px;background:#9b6a43}.ninja-balloon.is-target>span{outline:3px solid rgba(224,252,255,.95);box-shadow:0 0 0 8px #7dd3fc2e,0 0 34px #a5f3fce6,inset -18px -18px 26px #0f172a21;animation:ninja-target-glow 1s ease-in-out infinite}.ninja-balloon.is-current>span{outline:3px solid rgba(253,224,71,.68);filter:saturate(.82)}.ninja-balloon.is-wrong>span{outline-color:#ef4444b8;animation:ninja-wrong .2s ease-in-out 1}.ninja-word{display:inline-block}.ninja-char{display:inline-block;padding:0 1px;border-radius:4px;color:#ffffff8c;transition:color .1s ease,background .1s ease}.ninja-char.is-done{color:#eafff2;background:#16a34a8c;text-shadow:0 2px 8px rgba(6,78,59,.45)}.ninja-char.is-next{color:#0f172a;background:#fffffff0;box-shadow:0 0 0 2px #38bdf8a6;text-shadow:none}.ninja-balloon.is-shift{--balloon-width: 132px;--balloon-height: 140px;--balloon-font: 44px;width:168px}.ninja-shift{display:block;margin-top:8px;padding:3px 8px;border-radius:999px;background:#0f172a80;color:#fff;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:12px;font-weight:700;line-height:1.2;white-space:nowrap;text-shadow:none}.ninja-balloon.is-wrong .ninja-char.is-next{color:#fff;background:#dc2626f2;box-shadow:0 0 0 2px #fecacae6}.ninja-balloon.is-falling{animation:ninja-balloon-fall 2.4s ease-in forwards;pointer-events:none}.ninja-air{position:absolute;left:16px;right:16px;top:calc(var(--balloon-height) + 62px);height:7px;overflow:hidden;border-radius:999px;background:#0f172a33}.ninja-air b{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#22c55e,#fde047,#ef4444);transition:width .12s linear}.ninja-avatar{position:absolute;left:var(--ninja-x);top:var(--ninja-y);width:64px;height:112px;transform:translate(-50%,-50%);transition:left .46s cubic-bezier(.22,1,.36,1),top .46s cubic-bezier(.22,1,.36,1);z-index:4}.ninja-avatar.is-jumping{animation:ninja-jump .46s ease-out 1}.ninja-avatar.is-shaking{animation:ninja-shake .2s ease-in-out 1}.ninja-avatar.is-grounded{scale:1.12}.ninja-avatar__rope{position:absolute;left:34px;top:-48px;width:2px;height:62px;background:#47556994}.ninja-avatar__body{position:absolute;left:20px;top:32px;width:32px;height:50px;border-radius:18px 18px 14px 14px;background:#1e2f57;box-shadow:inset -8px -10px #0f172a38,0 10px 16px #0f172a33;transform:rotate(-8deg)}.ninja-avatar__head{position:absolute;left:2px;top:-25px;width:30px;height:30px;border-radius:50%;background:#17264d}.ninja-avatar__head:before{content:"";position:absolute;left:5px;top:11px;width:20px;height:8px;border-radius:999px;background:#fee2b3}.ninja-avatar__scarf{position:absolute;right:-19px;top:-1px;width:28px;height:12px;border-radius:999px;background:#111827;transform:rotate(-14deg)}.ninja-avatar__arm,.ninja-avatar__leg{position:absolute;display:block;border-radius:999px;background:#233764}.ninja-avatar__arm{width:10px;height:42px;top:-16px}.ninja-avatar__arm--left{left:1px;transform:rotate(-28deg)}.ninja-avatar__arm--right{right:1px;transform:rotate(26deg)}.ninja-avatar__leg{width:11px;height:40px;bottom:-31px}.ninja-avatar__leg--left{left:7px;transform:rotate(34deg)}.ninja-avatar__leg--right{right:4px;transform:rotate(-18deg)}.ninja-cliff{position:absolute;left:-34px;bottom:-22px;width:190px;height:108px;border-radius:55% 45% 18px 18px;background:radial-gradient(ellipse at 46% 6%,rgba(255,255,255,.28),transparent 18%),linear-gradient(155deg,#2e8c92,#17606f 54%,#23405f);box-shadow:inset -38px -22px #0f172a29,0 18px 24px #0f172a1f;z-index:2}.ninja-cliff:after{content:"";position:absolute;left:10px;right:18px;top:18px;height:26px;border-radius:50%;background:#4ade80;transform:rotate(-8deg)}.ninja-start-text{position:absolute;left:50%;top:58%;z-index:5;margin:0;transform:translate(-50%,-50%);color:#f0fdfff0;font-size:clamp(25px,3vw,40px);font-weight:900;text-align:center;text-shadow:0 4px 14px rgba(10,73,105,.38);pointer-events:none}.ninja-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:8;display:grid;place-items:center;background:#dbeafe61;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.ninja-card{width:min(520px,calc(100% - 28px));border:1.5px solid rgba(125,211,252,.72);border-radius:8px;background:#fffffff0;box-shadow:0 24px 64px #0f172a2e;padding:28px;text-align:center}.ninja-card__mark{display:inline-grid;place-items:center;width:68px;height:68px;margin-bottom:12px;border-radius:18px;background:#111827;color:#fff;font-size:38px;font-weight:900}.ninja-card h2{margin:0 0 8px;color:#0f172a;font-size:32px}.ninja-card p{margin:0 auto 18px;max-width:360px;color:#64748b;font-weight:700;line-height:1.5}.ninja-card dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:18px 0 22px}.ninja-card dl div{border:1px solid rgba(191,219,254,.9);border-radius:10px;background:#f8fafc;padding:12px}.ninja-card dt{color:#64748b;font-size:12px;font-weight:800}.ninja-card dd{margin:4px 0 0;color:#1e3a8a;font-size:26px;font-weight:900}.ninja-card__actions{display:flex;justify-content:center;gap:10px}.ninja-card__hint{margin:14px 0 0;color:#64748b;font-size:13px;font-weight:800}@keyframes ninja-cloud-drift{0%{transform:translate(0)}to{transform:translate(calc(100vw + 240px))}}@keyframes ninja-balloon-float{0%,to{translate:0 0}50%{translate:0 -10px}}@keyframes ninja-target-glow{0%,to{filter:brightness(1)}50%{filter:brightness(1.14)}}@keyframes ninja-jump{0%,to{margin-top:0}45%{margin-top:-54px}}@keyframes ninja-shake{0%,to{margin-left:0}25%{margin-left:-8px}75%{margin-left:8px}}@keyframes ninja-wrong{0%,to{transform:scale(1)}50%{transform:scale(1.08);background-color:#ef4444}}@keyframes ninja-balloon-fall{0%{translate:0 0;opacity:1}to{translate:0 520px;opacity:0;rotate:22deg}}@media(max-width:900px){.ninja-game__hud{grid-template-columns:repeat(5,minmax(74px,1fr))}.ninja-game__hud div{min-height:56px;padding:8px 10px}.ninja-game__hud div:first-child{grid-column:1 / -1;min-height:48px}.ninja-sound{margin:0 8px;padding-inline:8px;font-size:0}.ninja-sound:before{content:"🔊";font-size:17px}.ninja-sound:not(.is-on):before{content:"🔇"}.ninja-sky{min-height:500px;height:64vw;max-height:590px}.ninja-balloon{scale:.84;transform-origin:center top}.ninja-avatar{scale:.78;transform-origin:top center}.ninja-game__footer{grid-template-columns:repeat(3,minmax(0,1fr))}.ninja-game__footer>span:last-child{grid-column:1 / -1;min-height:38px;text-align:center}.ninja-card{padding:22px}.ninja-card dl{grid-template-columns:1fr}.ninja-card__actions{flex-direction:column}}@media(max-width:620px){.ninja-game{margin-inline:-8px;width:calc(100% + 16px)}.ninja-game__hud strong{font-size:17px}.ninja-game__hud div{font-size:9px}.ninja-sky{min-height:480px;height:76vh;border-radius:4px}.ninja-balloon{scale:.7}.ninja-start-text{width:80%}.ninja-game__footer>span{min-height:52px;padding-inline:9px}.ninja-game__footer strong{font-size:13px}.ninja-game__footer>span:nth-child(2) strong{font-size:14px}}.practice-dashboard{overflow:hidden;border:1px solid var(--glass-border);border-radius:22px;background:var(--glass-bg);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);box-shadow:var(--glass-shadow),var(--glass-edge)}.practice-dashboard__header{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 20px;border-bottom:1px solid var(--glass-hairline)}.practice-dashboard__eyebrow{margin-bottom:2px;color:var(--primary);font-size:10px;font-weight:800;text-transform:uppercase}.practice-dashboard__header h2{color:#172554;font-size:19px;letter-spacing:0}.practice-dashboard__actions{display:flex;gap:8px}.practice-dashboard__overview{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px;padding:18px 20px 20px;background:#fbfdff80}.stats{display:grid;grid-template-columns:repeat(5,minmax(120px,1fr));gap:10px}.stat{display:flex;align-items:center;gap:12px;min-height:72px;padding:11px 12px;background:#ffffff8c;border:1px solid rgba(255,255,255,.65);border-radius:14px;box-shadow:inset 0 1px #ffffffb3,var(--shadow-sm)}.stat__icon{width:31px;height:31px;display:grid;flex:0 0 31px;place-items:center;border-radius:6px;background:#eff6ff;font-size:16px}.stat__body{display:flex;flex-direction:column}.stat__value{font-size:21px;font-weight:800;color:#1e3a8a;line-height:1.1}.stat__label{font-size:11.5px;color:var(--text-soft)}.progress{display:flex;flex-direction:column;justify-content:center;gap:7px;padding:14px 16px;border-left:3px solid #60a5fa;background:#f1f7ff}.progress__row{display:flex;justify-content:space-between;align-items:baseline}.progress__row--sub{margin-top:8px}.progress__label{font-size:12.5px;font-weight:700;color:var(--text)}.progress__value{font-size:12px;color:var(--text-soft);font-weight:600}.progress__track{height:9px;background:var(--border);border-radius:999px;overflow:hidden}.progress__track--thin{height:6px}.progress__fill{height:100%;background:linear-gradient(90deg,#22c55e,#16a34a);border-radius:999px;transition:width .35s ease}.progress__fill--current{background:linear-gradient(90deg,#60a5fa,var(--primary))}.history{border-top:1px solid #e8eef7}.history__topline{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:17px 20px}.history__topline h3{color:#172554;font-size:16px}.history__topline p{margin-top:3px;color:var(--text-soft);font-size:12px}.history-summary{display:grid;grid-template-columns:repeat(4,minmax(90px,1fr));gap:1px;border:1px solid #dce7f7;background:#dce7f7}.history-summary>div{min-width:96px;padding:8px 11px;background:#fff}.history-summary dt{color:var(--text-soft);font-size:9px;font-weight:700;text-transform:uppercase;white-space:nowrap}.history-summary dd{margin-top:2px;color:#1e3a8a;font-size:16px;font-weight:800;font-variant-numeric:tabular-nums}.history__empty{min-height:150px;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:24px;border-top:1px solid #edf2f7;text-align:center}.history__empty>span{width:42px;height:42px;display:grid;place-items:center;margin-bottom:10px;border:1px solid #bfdbfe;border-bottom-width:3px;border-radius:6px;color:var(--primary);background:#eff6ff;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:15px;font-weight:800}.history__empty strong{color:#334155;font-size:14px}.history__empty p{margin-top:3px;color:var(--text-soft);font-size:12px}.history-list{border-top:1px solid #e8eef7}.history-list__head,.history-row{display:grid;grid-template-columns:130px minmax(210px,1fr) 118px 70px 96px 120px;gap:14px;align-items:center}.history-list__head{min-height:34px;padding:7px 20px;color:#64748b;background:#f8fafc;font-size:9px;font-weight:800;text-transform:uppercase}.history-row{min-height:64px;padding:9px 20px;border-top:1px solid #edf2f7}.history-row:hover{background:#fbfdff}.history-row time{color:#64748b;font-size:11px;font-variant-numeric:tabular-nums}.history-row__lesson,.history-row__score,.history-row__tail{display:flex;flex-direction:column;gap:2px}.history-row__lesson strong{overflow:hidden;color:#1e293b;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.history-row__lesson span{color:#64748b;font-size:10px}.history-row__score strong{color:#1e3a8a;font-size:16px}.history-row__score span{color:#f59e0b;font-size:10px;letter-spacing:0;white-space:nowrap}.history-row__metric{color:#1e3a8a;font-size:16px;font-variant-numeric:tabular-nums}.history-row__accuracy{width:max-content;padding:4px 7px;border-radius:5px;font-size:12px;font-variant-numeric:tabular-nums}.history-row__accuracy.is-pass{color:#15803d;background:#ecfdf3}.history-row__accuracy.is-low{color:#b45309;background:#fff7ed}.history-row__tail{color:#64748b;font-size:10px;font-variant-numeric:tabular-nums}.typing-insights{display:grid;gap:16px;padding:20px;border:1px solid var(--border);border-radius:8px;background:var(--surface)}.typing-insights__head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px}.typing-insights__eyebrow{color:#0f766e;font-size:11px;font-weight:800;text-transform:uppercase}.typing-insights__head h3{margin-top:3px;font-size:21px}.typing-insights__head p:not(.typing-insights__eyebrow){margin-top:5px;color:var(--text-soft);font-size:13px}.typing-insights__sample{flex:0 0 auto;min-width:128px;padding:10px 12px;border-left:3px solid #14b8a6;background:#f0fdfa}.typing-insights__sample strong{display:block;color:#0f766e;font-size:24px;line-height:1}.typing-insights__sample span{display:block;margin-top:4px;color:#64748b;font-size:10px;font-weight:700}.typing-insights__empty{display:flex;align-items:center;gap:14px;padding:18px;border:1px dashed #99f6e4;background:#f0fdfa}.typing-insights__empty>span{display:grid;place-items:center;width:54px;height:42px;border:1px solid #5eead4;border-bottom-width:3px;border-radius:6px;color:#0f766e;background:#fff;font-weight:900}.typing-insights__empty strong{font-size:14px}.typing-insights__empty p{margin-top:3px;color:var(--text-soft);font-size:12px}.typing-insights__notice{padding:8px 11px;border-left:3px solid #f59e0b;color:#92400e;background:#fffbeb;font-size:11.5px}.typing-insights__grid{display:grid;grid-template-columns:minmax(260px,.82fr) minmax(400px,1.18fr);gap:12px}.insight-block,.insight-keyboard,.insight-practice{min-width:0;padding:14px;border:1px solid var(--border);border-radius:8px;background:#fbfdff}.insight-block__head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:10px}.insight-block__head h4,.insight-practice h4{color:#172554;font-size:14px}.insight-block__head p,.insight-practice p{margin-top:3px;color:var(--text-soft);font-size:10.5px}.insight-block__head>span{color:#0f766e;font-size:10px;font-weight:800}.insight-block__good{color:#15803d;font-size:12px;line-height:1.5}.weak-key-list{display:grid;gap:5px;list-style:none}.weak-key-list li{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:9px;padding:7px 8px;border-bottom:1px solid #edf2f7}.weak-key-list li:last-child{border-bottom:0}.weak-key-list kbd{display:grid;place-items:center;min-width:34px;max-width:72px;height:31px;padding-inline:8px;border:1px solid #cbd5e1;border-bottom-width:3px;border-radius:5px;color:#0f172a;background:#fff;font:800 13px/1 inherit;white-space:nowrap}.weak-key-list__body{display:grid;gap:2px;min-width:0}.weak-key-list__body strong{overflow:hidden;color:#334155;font-size:11.5px;text-overflow:ellipsis;white-space:nowrap}.weak-key-list__body span{overflow:hidden;color:#64748b;font-size:10px;text-overflow:ellipsis;white-space:nowrap}.weak-key-list__rate{color:#b45309;font-size:14px;font-variant-numeric:tabular-nums}.finger-analysis{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:16px}.finger-row{display:grid;grid-template-columns:8px minmax(82px,auto) minmax(38px,1fr) 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