:root{--bg:#fafaf9;--surface:#fff;--surface-2:#f4f1ec;--ink:#161412;--muted:#706a62;--faint:#ada59a;--line:#e7e1d7;--yes:#15a04a;--yes-soft:#e7f6ec;--no:#d63c3c;--no-soft:#fdeaea;--accent:#ff6a00;--accent-soft:#fff0e0;--on-accent:#1a1210;--radius:20px;--radius-sm:12px;--shadow:0 1px 2px #1614120f, 0 8px 24px #1614120f;--shadow-lift:0 2px 4px #16141214, 0 16px 40px #1614121a;--font:-apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;--ease:cubic-bezier(.2, .7, .2, 1);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#0c0b0a;--surface:#181614;--surface-2:#211e1a;--ink:#f5f2ee;--muted:#a39a8f;--faint:#6f685e;--line:#2c2824;--yes:#35c96b;--yes-soft:#16301f;--no:#f0655f;--no-soft:#331a1a;--accent:#ff7a1f;--accent-soft:#3a2211;--on-accent:#1a1210;--shadow:0 1px 2px #0006, 0 8px 24px #0000004d;--shadow-lift:0 2px 4px #00000073, 0 16px 40px #0006}}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none;font-size:17px;line-height:1.45}button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation;background:0 0;border:none}.app{flex-direction:column;max-width:640px;height:100%;margin:0 auto;display:flex}.screen{padding:max(20px, env(safe-area-inset-top)) 20px 24px;-webkit-overflow-scrolling:touch;flex:1;overflow-y:auto}.screen--flush{flex-direction:column;display:flex;overflow:hidden}.nav{border-top:1px solid var(--line);background:color-mix(in srgb, var(--surface) 90%, transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding-bottom:env(safe-area-inset-bottom);display:flex}.nav a{letter-spacing:.01em;color:var(--faint);transition:color .15s var(--ease);flex-direction:column;flex:1;align-items:center;gap:3px;padding:9px 0 7px;font-size:11px;font-weight:500;text-decoration:none;display:flex}.nav a.active{color:var(--accent)}.nav .nav-icon{color:currentColor;width:23px;height:23px;transition:transform .15s var(--ease);justify-content:center;align-items:center;display:inline-flex;position:relative}.nav a.active .nav-icon{transform:translateY(-1px)}.nav .nav-badge{background:var(--no);color:#fff;text-align:center;border-radius:9px;min-width:17px;height:17px;padding:0 5px;font-size:10px;font-weight:700;line-height:17px;position:absolute;top:-3px;right:-7px}.eyebrow{letter-spacing:.09em;text-transform:uppercase;color:var(--faint);font-size:12px;font-weight:600}h1{letter-spacing:-.022em;font-size:30px;font-weight:680;line-height:1.15}h2{letter-spacing:-.012em;font-size:19px;font-weight:640}.muted{color:var(--muted)}.stack{flex-direction:column;gap:14px;display:flex}.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.panel-row{justify-content:space-between;align-items:center;gap:14px;display:flex}.tile{text-align:left;width:100%;color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .14s var(--ease), box-shadow .14s var(--ease);align-items:center;gap:13px;padding:15px 16px;text-decoration:none;display:flex}.tile:active{box-shadow:var(--shadow-lift);transform:scale(.985)}.tile[aria-disabled=true]{opacity:.45;pointer-events:none}.tile-emoji{width:34px;height:34px;color:var(--ink);flex-shrink:0;justify-content:center;align-items:center;display:flex}.tile-body{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.tile-title{letter-spacing:-.01em;font-weight:600}.tile-sub{color:var(--muted);font-size:14px}.tile-chevron{color:var(--faint);font-size:20px}.bar{background:var(--surface-2);border-radius:999px;height:10px;overflow:hidden}.bar-fill{background:var(--accent);height:100%;transition:width .5s var(--ease);border-radius:999px}.bar--thin{height:6px}.level-row{grid-template-columns:30px 1fr 62px;align-items:center;gap:11px;font-size:13px;display:grid}.level-row .level-name{font-variant-numeric:tabular-nums;font-weight:640}.level-row .level-count{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums}.card-stage{flex:1;justify-content:center;align-items:center;min-height:0;padding:8px 20px 4px;display:flex}.flip{perspective:1600px;background:0 0;width:100%;height:100%;max-height:460px;padding:0}.flip-inner{width:100%;height:100%;transform-style:preserve-3d;transition:transform .55s var(--ease);position:relative}.flip.is-flipped .flip-inner{transform:rotateY(180deg)}.face{background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-lift);backface-visibility:hidden;-webkit-user-select:none;user-select:none;border-radius:26px;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:26px 22px;display:flex;position:absolute;inset:0;overflow-y:auto}.face-back{transform:rotateY(180deg)}.card-word{letter-spacing:-.028em;text-align:center;overflow-wrap:anywhere;font-size:clamp(30px,8.5vw,42px);font-weight:660}.card-word--small{font-size:clamp(24px,6.5vw,31px)}.card-translation{letter-spacing:-.015em;text-align:center;color:var(--ink);overflow-wrap:anywhere;font-size:clamp(20px,5.6vw,26px);font-weight:560}.card-ipa{color:var(--muted);font-variant-numeric:tabular-nums;font-size:16px}.card-pos{letter-spacing:.08em;text-transform:uppercase;color:var(--faint);border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:11px;font-weight:600}.card-example{border-top:1px solid var(--line);text-align:center;width:100%;margin-top:6px;padding-top:14px;font-size:15px;line-height:1.5}.card-example .en{color:var(--ink)}.card-example .ru{color:var(--muted);margin-top:3px;font-size:14px}.card-hint{color:var(--faint);font-size:13px}.answers{padding:14px 20px calc(14px + env(safe-area-inset-bottom));justify-content:center;align-items:center;gap:22px;display:flex}.answer-btn{width:78px;height:78px;transition:transform .13s var(--ease), opacity .13s var(--ease);border:1.5px solid #0000;border-radius:50%;place-items:center;font-size:31px;font-weight:400;display:grid}.answer-btn:active{transform:scale(.9)}.answer-btn:disabled{opacity:.4;pointer-events:none}.answer-yes{background:var(--yes-soft);border-color:color-mix(in srgb, var(--yes) 26%, transparent);color:var(--yes)}.answer-no{background:var(--no-soft);border-color:color-mix(in srgb, var(--no) 26%, transparent);color:var(--no)}.btn{letter-spacing:-.01em;background:var(--accent);width:100%;color:var(--on-accent);transition:transform .13s var(--ease), opacity .13s var(--ease);border-radius:14px;padding:15px;font-weight:600;display:block}.btn:active{transform:scale(.985)}.btn--ghost{border:1px solid var(--line);color:var(--ink);background:0 0}.btn--small{padding:11px;font-size:15px}.mode-head{padding:max(14px, env(safe-area-inset-top)) 20px 10px;justify-content:space-between;align-items:center;gap:12px;display:flex}.mode-title{letter-spacing:-.012em;font-size:17px;font-weight:640}.mode-counter{color:var(--muted);font-variant-numeric:tabular-nums;font-size:15px;font-weight:620}.mode-back{color:var(--muted);font-size:15px;text-decoration:none}.options{flex-direction:column;gap:10px;width:100%;display:flex}.option{text-align:left;border:1px solid var(--line);background:var(--surface);width:100%;transition:transform .12s var(--ease);border-radius:14px;padding:15px 16px;font-weight:520}.option:active{transform:scale(.985)}.option.is-correct{border-color:var(--yes);background:var(--yes-soft);color:var(--yes);font-weight:620}.option.is-wrong{border-color:var(--no);background:var(--no-soft);color:var(--no);font-weight:620}.option:disabled{pointer-events:none}.stat-grid{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);padding:13px 14px}.stat-value{letter-spacing:-.02em;font-variant-numeric:tabular-nums;font-size:25px;font-weight:660}.stat-label{color:var(--muted);font-size:12.5px}.chart{align-items:flex-end;gap:3px;height:96px;display:flex}.chart-bar{background:var(--accent);opacity:.85;min-width:3px;transition:height .4s var(--ease);border-radius:3px 3px 0 0;flex:1}.chart-bar--empty{background:var(--surface-2);opacity:1}.word-list{flex-wrap:wrap;gap:7px;display:flex}.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:5px 12px;font-size:14px}.center-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;height:100%;padding:40px 24px;display:flex}.center-state .emoji{font-size:44px}.center-state .emoji--icon{color:var(--faint);justify-content:center;align-items:center;display:flex}@media (prefers-reduced-motion:reduce){*{transition-duration:.01ms!important}}@keyframes cardIn{0%{opacity:0;transform:translateY(10px)scale(.985)}to{opacity:1;transform:none}}.flip{animation:cardIn .26s var(--ease) both}