:root{--bg:#eef0f7;--bg-soft:#e2e5f0;--surface:#ffffff;--text:#1a1b26;--text-dim:#64657a;--accent:#6c5cf0;--good:#12a150;--bad:#e0384a;--border:#dfe2ec;--radius:22px;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--nav-h:62px;color-scheme:light}[data-theme=dark]{--bg:#0a0a0f;--bg-soft:#15151f;--surface:#1c1c28;--text:#f4f4f8;--text-dim:#9a9ab0;--accent:#7c6cff;--good:#34d399;--bad:#ff6b6b;--border:var(--border);color-scheme:dark}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body,html{margin:0;padding:0;height:100%;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;overscroll-behavior:none}button{font-family:inherit;cursor:pointer;border:none;color:inherit}.app{position:relative;height:100dvh;width:100%;overflow:hidden}.loading{display:grid;place-items:center;height:100dvh;color:var(--text-dim);font-size:18px}.feed{height:100dvh;overflow-y:scroll;scroll-snap-type:y mandatory;scrollbar-width:none}.card::-webkit-scrollbar,.feed::-webkit-scrollbar{display:none}.card{position:relative;height:100dvh;overflow-y:auto;scrollbar-width:none;scroll-snap-align:start;scroll-snap-stop:always;display:flex;flex-direction:column;justify-content:flex-start;padding:calc(92px + var(--safe-top)) 24px calc(var(--nav-h) + var(--safe-bottom) + 24px);background:radial-gradient(120% 80% at 50% 0,color-mix(in srgb,var(--card-accent) 16%,transparent),transparent 60%),var(--bg)}.card-kicker{align-self:flex-start;display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--card-accent)}.card-front{font-size:clamp(26px,6.4vw,40px);font-weight:800;line-height:1.18;letter-spacing:-.01em}.card-back{margin-top:20px;font-size:clamp(18px,4.6vw,24px);line-height:1.4;color:var(--text);padding:16px 18px;background:var(--surface);border-radius:var(--radius);border-left:4px solid var(--card-accent);animation:fade .2s ease}.source{margin-top:14px;font-size:12.5px;color:var(--text-dim)}.card-actions{margin-top:26px;display:flex;flex-direction:column;gap:12px}.btn{width:100%;padding:16px;border-radius:16px;font-size:17px;font-weight:700;background:var(--surface);transition:transform .08s ease,background .15s ease}.btn:active{transform:scale(.98)}.btn-primary{background:var(--card-accent);color:#0a0a0f}.choices{margin-top:24px;display:flex;flex-direction:column;gap:12px}.choice{text-align:left;padding:16px 18px;border-radius:16px;background:var(--surface);font-size:17px;font-weight:600;border:2px solid transparent;transition:transform .08s ease}.choice:active{transform:scale(.99)}.choice.correct{border-color:var(--good);background:color-mix(in srgb,var(--good) 18%,var(--surface))}.choice.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 18%,var(--surface))}.choice:disabled{cursor:default}.type-row{margin-top:24px}.type-input{width:100%;padding:16px 18px;border-radius:16px;background:var(--surface);color:var(--text);font-size:19px;font-weight:600;border:2px solid color-mix(in srgb,var(--card-accent) 40%,transparent);outline:none}.type-input:focus{border-color:var(--card-accent)}.type-input:disabled{opacity:.8}.btn.ghost{background:transparent;color:var(--text-dim);box-shadow:inset 0 0 0 1.5px var(--border)}.result-mark{margin-top:22px;font-size:18px;font-weight:800}.result-mark.correct{color:var(--good)}.result-mark.wrong{color:var(--bad)}.easy-chip{margin-top:16px;align-self:flex-start;padding:10px 16px;border-radius:999px;background:transparent;color:var(--good);font-size:14px;font-weight:700;box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--good) 45%,transparent)}.easy-chip.done{color:var(--text-dim);box-shadow:none}.rating{margin-top:22px;display:grid;grid-template-columns:repeat(4,1fr);grid-gap:8px;gap:8px}.rate-btn{padding:14px 6px;border-radius:14px;background:var(--surface);font-size:14px;font-weight:700;display:flex;flex-direction:column;gap:2px;align-items:center}.rate-btn small{font-size:11px;font-weight:600;color:var(--text-dim)}.steps{margin-top:22px;display:flex;flex-direction:column;gap:10px}.step{padding:14px 16px;border-radius:14px;background:var(--surface);font-size:18px;animation:fade .2s ease}.step-hint{color:var(--text-dim);font-size:13px;margin-top:6px}.swipe-hint{position:absolute;bottom:40px;left:0;right:0;text-align:center;color:var(--text-dim);font-size:14px;font-weight:600;animation:bob 1.4s ease-in-out infinite}.listen{margin-top:14px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}.play-btn{align-self:flex-start;padding:14px 22px;border-radius:999px;background:var(--card-accent);color:#0a0a0f;font-size:17px;font-weight:800;display:inline-flex;gap:10px;align-items:center}.listen-text{font-size:clamp(22px,5.6vw,30px);font-weight:800;line-height:1.25;padding:14px 18px;border-radius:16px;background:var(--surface);border-left:4px solid var(--card-accent)}.listen-note{color:var(--text-dim);font-size:13px}.header{position:absolute;top:0;left:0;right:0;z-index:20;padding:calc(14px + var(--safe-top)) 18px 14px;display:flex;justify-content:space-between;pointer-events:none;background:linear-gradient(var(--bg),transparent)}.header,.streak{align-items:center}.streak{display:inline-flex;gap:6px;font-weight:800;font-size:16px;background:var(--surface);padding:8px 14px;border-radius:999px;pointer-events:auto}.fab{bottom:calc(84px + var(--safe-bottom));right:18px;z-index:20;width:60px;height:60px;border-radius:50%;background:var(--accent);color:#fff;font-size:30px;font-weight:700;place-items:center;box-shadow:0 8px 24px rgba(124,108,255,.45);text-decoration:none}.celebrate,.fab{position:absolute;display:grid}.celebrate{inset:0;z-index:30;place-items:center;pointer-events:none;background:radial-gradient(closest-side,rgba(124,108,255,.25),transparent);animation:pop .4s ease}.celebrate-card{text-align:center;background:var(--surface);padding:28px 36px;border-radius:24px;font-weight:800;font-size:22px;box-shadow:0 20px 60px rgba(20,22,45,.22)}.celebrate-card span{display:block;font-size:40px;margin-bottom:8px}.caughtup{height:100dvh;scroll-snap-align:start;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px;gap:10px}.caughtup h2{font-size:30px;margin:8px 0 0}.caughtup p{color:var(--text-dim);font-size:16px;margin:0}.caughtup .big{font-size:64px}.caughtup a,.caughtup-btn{margin-top:20px;padding:16px 28px;border-radius:16px;background:var(--accent);color:#fff;font-weight:800;font-size:16px;text-decoration:none}.caughtup-btn:disabled{opacity:.6}.track-switch{position:absolute;top:calc(70px + var(--safe-top));left:0;right:0;z-index:25;display:flex;gap:8px;padding:4px 14px;overflow-x:auto;scrollbar-width:none}.track-switch::-webkit-scrollbar{display:none}.track-chip{flex:0 0 auto;padding:8px 15px;border-radius:999px;background:var(--surface);color:var(--text-dim);font-size:14px;font-weight:700;white-space:nowrap}.track-chip.on{color:var(--text);box-shadow:inset 0 0 0 1.6px var(--accent)}.app.has-tracks .card{padding-top:calc(124px + var(--safe-top))}.capture{min-height:100dvh;padding:calc(64px + var(--safe-top)) 24px 40px;display:flex;flex-direction:column}.capture .back{position:absolute;top:calc(20px + var(--safe-top));left:16px;width:44px;height:44px;border-radius:50%;background:var(--surface);font-size:22px}.capture h1{font-size:30px;font-weight:800;margin:0 0 6px;letter-spacing:-.01em}.capture .sub{color:var(--text-dim);margin:0 0 28px;font-size:16px}.subject-pills{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px}.pill{padding:12px 18px;border-radius:999px;background:var(--surface);font-size:16px;font-weight:700;transition:transform .08s ease}.pill:active{transform:scale(.97)}.cta{padding:18px;border-radius:18px;background:var(--accent);color:#fff;font-size:18px;font-weight:800;margin-top:auto}.cta:disabled{opacity:.6}.cta.camera{background:var(--accent)}.msg{margin-top:16px;font-size:15px;line-height:1.4;color:var(--text-dim);text-align:center}.msg.error{color:var(--bad)}.result{margin:auto 0;text-align:center;display:flex;flex-direction:column;align-items:center;gap:8px}.result .big{font-size:64px}.result h2{font-size:26px;margin:0 0 16px}.result .cta{width:100%}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:40;height:calc(var(--nav-h) + var(--safe-bottom));padding-bottom:var(--safe-bottom);display:flex;background:color-mix(in srgb,var(--bg-soft) 92%,transparent);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-top:1px solid var(--border)}.nav-item{flex:1 1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;text-decoration:none;color:var(--text-dim);font-size:11px;font-weight:700}.nav-item.active{color:var(--text)}.nav-icon{font-size:22px;filter:grayscale(.6);opacity:.7}.nav-item.active .nav-icon{filter:none;opacity:1}.page{min-height:100dvh;padding:calc(20px + var(--safe-top)) 18px calc(var(--nav-h) + var(--safe-bottom) + 24px);max-width:560px;margin:0 auto}.page-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.page-head h1{font-size:28px;font-weight:800;margin:0;letter-spacing:-.01em}.saved-pill{font-size:13px;font-weight:700;color:var(--good);background:color-mix(in srgb,var(--good) 15%,transparent);padding:6px 12px;border-radius:999px}.empty-note{color:var(--text-dim);font-size:15px;text-align:center;padding:32px 12px}.empty-note.small{padding:12px;font-size:13.5px}.stat-row{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:10px;gap:10px;margin-bottom:22px}.stat-tile{background:var(--surface);border-radius:18px;padding:16px 10px;text-align:center}.stat-big{font-size:24px;font-weight:800}.stat-cap{font-size:12px;color:var(--text-dim);margin-top:2px;font-weight:600}.cal-nav{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.cal-month{font-size:17px;font-weight:800}.cal-arrow{width:40px;height:40px;border-radius:12px;background:var(--surface);font-size:22px;font-weight:700}.cal-arrow:disabled{opacity:.35}.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);grid-gap:6px;gap:6px}.cal-dow{margin-bottom:6px}.dow{text-align:center;font-size:11px;font-weight:700;color:var(--text-dim)}.cal-cell{aspect-ratio:1;border-radius:12px;position:relative;display:flex;align-items:flex-start;justify-content:flex-start;padding:5px 7px;font:inherit}.cal-cell,.cal-cell.empty{background:transparent}.cal-cell.has-data{background:var(--surface)}.cal-cell.complete{background:color-mix(in srgb,var(--good) 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var(--accent)}.text-input{width:100%;padding:13px 15px;border-radius:14px;background:var(--bg-soft);color:var(--text);border:1px solid var(--border);font-size:16px;font-weight:600;outline:none}.text-input:focus{border-color:var(--accent)}.profile-switch{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.profile-chip-row{display:flex;align-items:center;gap:4px}.profile-chip{padding:10px 14px;border-radius:999px;background:var(--bg-soft);font-size:14px;font-weight:700;color:var(--text-dim)}.profile-chip.on{color:#0a0a0f;background:var(--accent)}.chip-del{width:26px;height:26px;border-radius:50%;background:var(--bg-soft);color:var(--bad);font-size:16px;font-weight:800;line-height:1}.add-profile{display:flex;gap:8px;margin-top:6px}.add-profile .text-input{flex:1 1}.add-btn{padding:0 20px;border-radius:14px;background:var(--accent);color:#0a0a0f;font-size:15px;font-weight:800}.auth{min-height:100dvh;display:grid;place-items:center;padding:24px;background:radial-gradient(120% 80% at 50% 0,color-mix(in srgb,var(--accent) 18%,transparent),transparent 60%),var(--bg)}.auth-card{width:100%;max-width:380px;background:var(--surface);border-radius:24px;padding:32px 26px;text-align:center}.auth-logo{font-size:40px;margin-bottom:8px}.auth-card h1{font-size:26px;font-weight:800;margin:0 0 6px;letter-spacing:-.01em}.auth-sub{color:var(--text-dim);font-size:14.5px;margin:0 0 24px}.auth-google{width:100%;padding:14px;border-radius:14px;background:#fff;color:#1a1a1a;border:1px solid var(--border);font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:center;gap:10px}.auth-google .g{font-weight:900;color:#4285f4;font-size:18px}.auth-or{display:flex;align-items:center;gap:12px;color:var(--text-dim);font-size:13px;margin:18px 0}.auth-or:after,.auth-or:before{content:"";flex:1 1;height:1px;background:var(--border)}.auth-form{display:flex;flex-direction:column;gap:12px}.auth-input{width:100%;padding:14px 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pop{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}