:root{--bg:#0b0b0f;--fg:#f4f2ee;--muted:#8b8b96;--line:#1e1e26;--new:#ffb454;--due:#7aa2f7;--soon:#9ece6a;--variety:#bb9af7;--retention:#f7768e;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{height:100%;margin:0;padding:0}body{background:var(--bg);color:var(--fg);overscroll-behavior:none;-webkit-user-select:none;user-select:none;font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,system-ui,sans-serif}.boot{place-items:center;height:100dvh;display:grid}.boot-mark{background:linear-gradient(150deg, var(--new), var(--retention));color:#16161d;border-radius:18px;place-items:center;width:64px;height:64px;font-size:30px;font-weight:800;animation:1.4s ease-in-out infinite pulse;display:grid}@keyframes pulse{0%,to{opacity:.55;transform:scale(.97)}50%{opacity:1;transform:scale(1)}}.feed{scroll-snap-type:y mandatory;overscroll-behavior-y:contain;-webkit-overflow-scrolling:touch;scrollbar-width:none;height:100dvh;overflow-y:scroll}.feed::-webkit-scrollbar{display:none}.slide{scroll-snap-align:start;scroll-snap-stop:always;height:100dvh}.slide-placeholder{height:100%}.card{height:100%;display:block;position:relative;overflow:hidden}.card-inner{height:100%;padding:calc(var(--safe-top) + 68px) 26px calc(var(--safe-bottom) + 28px);will-change:transform;flex-direction:column;display:flex}.card[data-kind=new] .dot{background:var(--new)}.card[data-kind=due] .dot{background:var(--due)}.card[data-kind=soon] .dot{background:var(--soon)}.card[data-kind=variety] .dot{background:var(--variety)}.card[data-kind=retention] .dot{background:var(--retention)}.kind{letter-spacing:.09em;text-transform:uppercase;color:var(--muted);flex:none;align-items:center;gap:8px;font-size:12px;display:flex}.dot{border-radius:50%;width:7px;height:7px}.type-tag{border:1px solid var(--line);letter-spacing:.05em;border-radius:999px;margin-left:auto;padding:3px 8px;font-size:11px}.prompt{flex-direction:column;flex:auto;justify-content:center;min-height:0;display:flex}.lemma{letter-spacing:-.02em;margin:0;font-size:clamp(34px,11vw,54px);font-weight:700;line-height:1.08}.lemma.en{color:var(--fg);font-size:clamp(28px,9vw,44px);font-weight:500}.tap-hint{color:var(--muted);margin:22px 0 0;font-size:14px;animation:2.6s ease-in-out infinite fade}@keyframes fade{0%,to{opacity:.35}50%{opacity:.85}}.listen-btn{border:1px solid var(--line);width:84px;height:84px;color:var(--fg);background:#14141b;border-radius:50%;padding-left:5px;font-size:26px}.answer{border-top:1px solid var(--line);flex:none;padding-top:20px;animation:.24s cubic-bezier(.22,1,.36,1) rise}@keyframes rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.answer-main{margin:0 0 16px;font-size:24px;font-weight:600}.example-de{margin:0 0 4px;font-size:17px;line-height:1.45}.example-en{color:var(--muted);margin:0;font-size:15px;line-height:1.45}.mnemonic{color:#cfcbc2;background:#131319;border-radius:12px;margin:16px 0 0;padding:12px 14px;font-size:14px;line-height:1.5}.meta{gap:8px;margin-top:16px;display:flex}.pill{border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:3px 9px;font-size:11px}.footer-hint{color:#4a4a55;text-align:center;flex:none;padding-top:18px;font-size:12px}.again-hint{border:2px solid var(--retention);color:var(--retention);letter-spacing:.06em;text-transform:uppercase;pointer-events:none;border-radius:10px;padding:6px 14px;font-size:14px;font-weight:700;position:absolute;top:50%;right:24px;transform:translateY(-50%)rotate(8deg)}.hud{top:calc(var(--safe-top) + 12px);z-index:10;pointer-events:none;align-items:center;gap:10px;padding:0 22px;display:flex;position:fixed;left:0;right:0}.hud-btn{pointer-events:auto;-webkit-backdrop-filter:blur(12px);border:1px solid var(--line);color:var(--fg);background:#14141bb8;border-radius:999px;padding:7px 14px;font-size:13px}.hud-btn strong{font-weight:700}.hud-today{color:var(--muted);font-size:12px}.sheet-backdrop{z-index:20;background:#0000008c;align-items:flex-end;animation:.18s fadein;display:flex;position:fixed;inset:0}@keyframes fadein{0%{opacity:0}to{opacity:1}}.sheet{border-top:1px solid var(--line);width:100%;padding:10px 24px calc(var(--safe-bottom) + 26px);background:#101017;border-radius:22px 22px 0 0;animation:.26s cubic-bezier(.22,1,.36,1) slideup}@keyframes slideup{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}.sheet-grabber{background:#2c2c36;border-radius:2px;width:38px;height:4px;margin:0 auto 22px}.big-number{align-items:baseline;gap:10px;display:flex}.big-number strong{letter-spacing:-.03em;font-size:44px;font-weight:800}.big-number span{color:var(--muted);font-size:15px}.bar{background:#1c1c24;border-radius:3px;height:6px;margin-top:16px;overflow:hidden}.bar-fill{background:linear-gradient(90deg, var(--soon), var(--due));border-radius:3px;height:100%;transition:width .4s}.bar-caption{color:var(--muted);margin:10px 0 0;font-size:13px}.stat-grid{grid-template-columns:repeat(3,1fr);gap:10px;margin-top:24px;display:grid}.stat-grid div{background:#16161d;border-radius:14px;padding:14px}.stat-grid strong{font-size:22px;font-weight:700;display:block}.stat-grid span{color:var(--muted);font-size:12px}.note{color:#5c5c68;margin:20px 0 0;font-size:12px;line-height:1.5}.ghost-btn{border:1px solid var(--line);width:100%;color:var(--muted);background:0 0;border-radius:13px;margin-top:10px;padding:13px;font-size:14px}.ghost-btn.danger{color:#7a5560}.account-row{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:12px;margin-top:22px;padding-top:18px;display:flex}.account-row strong{font-size:14px;font-weight:500;display:block}.account-row span{color:var(--muted);font-size:12px}.sync-badge{border:1px solid var(--new);color:var(--new);white-space:nowrap;background:0 0;border-radius:999px;padding:6px 12px;font-size:12px}.sync-ok{color:var(--soon);font-size:12px}.hud-sync{background:var(--soon);border-radius:50%;width:7px;height:7px;animation:1s ease-in-out infinite pulse}.auth{min-height:100dvh;padding:calc(var(--safe-top) + 24px) 24px calc(var(--safe-bottom) + 24px);place-items:center;display:grid}.auth-card{width:100%;max-width:360px}.auth-mark{background:linear-gradient(150deg, var(--new), var(--retention));color:#16161d;border-radius:15px;place-items:center;width:52px;height:52px;font-size:25px;font-weight:800;display:grid}.auth h1{letter-spacing:-.02em;margin:18px 0 4px;font-size:28px}.auth-sub{color:var(--muted);margin:0 0 28px;font-size:15px}.auth label{margin-bottom:16px;display:block}.auth label>span{color:var(--muted);margin-bottom:7px;font-size:13px;display:block}.auth label em{opacity:.6;font-style:normal}.auth label small{color:var(--muted);margin-top:8px;font-size:12px;display:block}.auth input{border:1px solid var(--line);width:100%;color:var(--fg);-webkit-user-select:text;user-select:text;background:#14141b;border-radius:12px;padding:13px 14px;font-size:16px}.auth input:focus{border-color:#3a3a48;outline:none}.levels{grid-template-columns:repeat(6,1fr);gap:6px;display:grid}.level{border:1px solid var(--line);color:var(--muted);background:#14141b;border-radius:10px;padding:10px 0;font-size:13px}.level.on{border-color:var(--new);color:#16161d;background:var(--new);font-weight:600}.auth-error{color:var(--retention);background:#f7768e1f;border:1px solid #f7768e4d;border-radius:11px;margin:0 0 14px;padding:11px 13px;font-size:13px;line-height:1.4}.primary-btn{background:var(--fg);color:#0b0b0f;border:none;border-radius:13px;width:100%;padding:14px;font-size:15px;font-weight:600}.primary-btn:disabled{opacity:.55}.link-btn{width:100%;color:var(--muted);text-align:center;background:0 0;border:none;margin-top:16px;padding:8px;font-size:13px;display:block}