:root{--bg: #f4f6f8;--bg-tint: #e8edf2;--surface: #ffffff;--surface-2: #eef1f5;--border: #e0e5ec;--border-strong: #c8d0da;--text: #18202b;--muted: #5c6774;--accent: #2f4a6b;--accent-2: #3c6077;--accent-soft: #e7ecf2;--accent-text: #ffffff;--gradient: linear-gradient(135deg, #26374d 0%, #2f4a6b 55%, #3a5c73 100%);--ok: #0f9d63;--ok-soft: #dcf7ec;--bad: #dc2f4b;--bad-soft: #ffe4e8;--warn: #9a4508;--warn-soft: #fdf0d5;--radius: 20px;--radius-sm: 12px;--shadow: 0 1px 2px rgba(20, 32, 48, .04), 0 8px 24px rgba(20, 32, 48, .06);--shadow-lg: 0 16px 40px rgba(20, 32, 48, .13);--font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;--lv-a1: #4a7c64;--lv-a2: #40707c;--lv-b1: #456a92;--lv-b2: #545a86;--lv-sat: #33475f;--lv-ielts: #3a6270;--lv-default: #2f4a6b}@media (prefers-color-scheme: dark){:root{--bg: #0e1219;--bg-tint: #172029;--surface: #161c25;--surface-2: #1e242e;--border: #262e39;--border-strong: #38424f;--text: #e8ecf2;--muted: #94a1b0;--accent: #8aa8c6;--accent-2: #7ba3b3;--accent-soft: #1a2431;--accent-text: #0e1219;--gradient: linear-gradient(135deg, #223142 0%, #2f4a6b 55%, #3a5c73 100%);--ok: #34d399;--ok-soft: #10301f;--bad: #ff7a8f;--bad-soft: #3a1721;--warn: #f0b45e;--warn-soft: #35270f;--shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 10px 26px rgba(0, 0, 0, .32);--shadow-lg: 0 18px 44px rgba(0, 0, 0, .48)}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}h1,h2,h3{margin:0;line-height:1.15;letter-spacing:-.03em}h1{font-size:clamp(1.9rem,1.4rem + 2vw,2.6rem);font-weight:800}h2{font-size:1.4rem;font-weight:750}h3{font-size:1.08rem;font-weight:700;letter-spacing:-.015em}a{color:var(--accent);text-decoration:none;font-weight:600}a:hover{text-decoration:underline}::selection{background:var(--accent);color:var(--accent-text)}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:20px;padding:14px 26px;background:color-mix(in srgb,var(--surface) 82%,transparent);-webkit-backdrop-filter:blur(14px) saturate(1.4);backdrop-filter:blur(14px) saturate(1.4);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:baseline;gap:10px;font-weight:900;font-size:1.2rem;letter-spacing:-.035em;color:var(--accent)}.brand:hover{text-decoration:none;filter:brightness(1.1)}.brand span{font-weight:600;font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);-webkit-text-fill-color:var(--muted)}.topbar nav{display:flex;gap:4px;margin-left:auto;align-items:center;flex-wrap:wrap}.topbar nav a{padding:8px 14px;border-radius:999px;color:var(--muted);font-size:.92rem;font-weight:650}.topbar nav a:hover{background:var(--surface-2);color:var(--text);text-decoration:none}.topbar nav a.active{background:var(--gradient);color:#fff;box-shadow:0 4px 14px color-mix(in srgb,var(--accent) 40%,transparent)}.who{font-size:.82rem;font-weight:600;color:var(--muted);padding-left:14px;border-left:1px solid var(--border);margin-left:8px}.page{width:100%;max-width:1120px;margin:0 auto;padding:30px 26px 90px;flex:1}.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:26px}.page-head p{margin:8px 0 0;color:var(--muted);font-size:.98rem;max-width:62ch}.hero{position:relative;overflow:hidden;border-radius:var(--radius);padding:30px 32px;margin-bottom:26px;background:var(--gradient);color:#fff;box-shadow:var(--shadow-lg)}.hero:after{content:"";position:absolute;inset:-60% -20% auto auto;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.28),transparent 65%);pointer-events:none}.hero h1{color:#fff}.hero p{margin:10px 0 0;color:#ffffffe6;font-size:1rem;max-width:60ch}.hero .hero-actions{position:relative;margin-top:20px;display:flex;gap:10px;flex-wrap:wrap}.hero .btn{background:#fffffff5;border-color:transparent;color:#2a1b6b;font-weight:750}.hero .btn:hover:not(:disabled){background:#fff;transform:translateY(-1px)}.hero .btn.hollow{background:#ffffff24;color:#fff;border-color:#ffffff80}.hero .btn.hollow:hover:not(:disabled){background:#ffffff3d}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(268px,1fr))}.stat-row{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));margin-bottom:28px}.stat{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow)}.stat:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--gradient)}.stat .value{font-size:2rem;font-weight:850;letter-spacing:-.045em;font-variant-numeric:tabular-nums;line-height:1.1}.stat .label{font-size:.72rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.09em;margin-top:2px}.deck-card{position:relative;overflow:hidden;display:flex;flex-direction:column;gap:12px;text-align:left;transition:transform .18s ease,box-shadow .18s ease;font:inherit;color:inherit;padding-top:26px}.deck-card:before{content:"";position:absolute;top:0;left:0;right:0;height:6px;background:var(--band, var(--gradient))}.deck-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.deck-card .desc{font-size:.9rem;color:var(--muted);flex:1}.deck-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.level{font-size:.72rem;font-weight:800;letter-spacing:.08em;padding:5px 11px;border-radius:999px;background:var(--lv, var(--lv-default));color:#fff}.level-a1{--lv: #3d6a52}.level-a2{--lv: #35706f}.level-b1{--lv: #3a5a80}.level-b2{--lv: #55508a}.level-sat{--lv: #26374b}.level-ielts{--lv: #2b5260}.band-a1{--band: linear-gradient(90deg, #3d6a52, #6a9c81)}.band-a2{--band: linear-gradient(90deg, #35706f, #63a09f)}.band-b1{--band: linear-gradient(90deg, #3a5a80, #6e8fb6)}.band-b2{--band: linear-gradient(90deg, #55508a, #8681b8)}.band-sat{--band: linear-gradient(90deg, #26374b, #5a7a99)}.band-ielts{--band: linear-gradient(90deg, #2b5260, #5f8b98)}.bar{height:10px;border-radius:999px;background:var(--surface-2);overflow:hidden;display:flex}.bar i{display:block;height:100%;transition:width .4s ease}.bar .learned{background:linear-gradient(90deg,var(--ok),color-mix(in srgb,var(--ok) 60%,#fff))}.bar .started{background:var(--accent);opacity:.4}.deck-meta{display:flex;justify-content:space-between;align-items:center;font-size:.83rem;font-weight:600;color:var(--muted);font-variant-numeric:tabular-nums}.prereq{margin:0;font-size:.82rem;line-height:1.45;color:var(--warn);background:var(--warn-soft);padding:9px 12px;border-radius:var(--radius-sm);font-weight:600}button{font:inherit}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:999px;border:1.5px solid var(--border-strong);background:var(--surface);color:var(--text);font-weight:700;font-size:.95rem;cursor:pointer;transition:transform .12s ease,box-shadow .15s ease,background .15s}.btn:hover:not(:disabled){background:var(--surface-2);transform:translateY(-1px)}.btn:active:not(:disabled){transform:translateY(0)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--gradient);border-color:transparent;color:#fff;box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 38%,transparent)}.btn.primary:hover:not(:disabled){filter:brightness(1.08);box-shadow:0 10px 26px color-mix(in srgb,var(--accent) 48%,transparent)}.btn.ghost{border-color:transparent;background:transparent;box-shadow:none}.btn.ghost:hover:not(:disabled){background:var(--surface-2)}.btn.danger{color:var(--bad);border-color:transparent;background:transparent;box-shadow:none}.btn.danger:hover:not(:disabled){background:var(--bad-soft)}.btn.small{padding:7px 14px;font-size:.85rem}.btn.block{width:100%}label.field{display:block;margin-bottom:16px}label.field>span{display:block;font-size:.78rem;font-weight:750;text-transform:uppercase;letter-spacing:.07em;margin-bottom:7px;color:var(--muted)}label.field small{display:block;margin-top:6px;font-size:.8rem}input[type=text],input[type=email],input[type=password],textarea,select{width:100%;padding:12px 14px;border-radius:var(--radius-sm);border:1.5px solid var(--border-strong);background:var(--surface);color:var(--text);font:inherit;transition:border-color .15s,box-shadow .15s}textarea{resize:vertical;min-height:96px;line-height:1.55}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent)}input:focus-visible,textarea:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:2px}.seg{display:inline-flex;padding:4px;gap:4px;background:var(--surface-2);border-radius:999px;border:1px solid var(--border);flex-wrap:wrap}.seg button{border:none;background:transparent;color:var(--muted);padding:8px 16px;border-radius:999px;cursor:pointer;font-size:.87rem;font-weight:700;transition:all .15s}.seg button:hover{color:var(--text)}.seg button[aria-pressed=true]{background:var(--gradient);color:#fff;box-shadow:0 4px 12px color-mix(in srgb,var(--accent) 35%,transparent)}.notice{padding:13px 16px;border-radius:var(--radius-sm);font-size:.92rem;font-weight:600;margin-bottom:16px;border:1.5px solid transparent}.notice.error{background:var(--bad-soft);color:var(--bad);border-color:color-mix(in srgb,var(--bad) 40%,transparent)}.notice.info{background:var(--accent-soft);color:var(--accent)}.notice.ok{background:var(--ok-soft);color:var(--ok);border-color:color-mix(in srgb,var(--ok) 35%,transparent)}.empty{text-align:center;padding:64px 20px;color:var(--muted)}.empty h2{margin-bottom:10px;color:var(--text)}.empty p{margin-bottom:18px}.practice{max-width:660px;margin:0 auto}.practice-head{display:flex;align-items:center;gap:14px;margin-bottom:20px;font-size:.84rem;font-weight:700;color:var(--muted);font-variant-numeric:tabular-nums}.progress-track{flex:1;height:8px;background:var(--surface-2);border-radius:999px;overflow:hidden}.progress-track i{display:block;height:100%;background:var(--gradient);transition:width .35s ease}.prompt{text-align:center;padding:38px 20px 32px}.prompt .cue{font-size:.74rem;font-weight:750;text-transform:uppercase;letter-spacing:.12em;color:var(--accent)}.prompt .word{font-size:clamp(2.2rem,1.6rem + 3vw,3.1rem);font-weight:850;letter-spacing:-.045em;margin:10px 0 6px;overflow-wrap:anywhere;color:var(--text)}.prompt .pos{font-size:.85rem;color:var(--muted);font-weight:600;font-style:italic}.options{display:grid;gap:11px;margin-top:8px}.option{display:flex;align-items:center;gap:14px;width:100%;padding:16px 18px;text-align:left;border-radius:var(--radius-sm);border:2px solid var(--border-strong);background:var(--surface);color:var(--text);font-size:1.02rem;font-weight:650;cursor:pointer;transition:transform .12s,border-color .12s,background .12s}.option:hover:not(:disabled){border-color:var(--accent);transform:translate(4px)}.option:disabled{cursor:default}.option .key{flex:none;width:30px;height:30px;display:grid;place-items:center;border-radius:9px;background:var(--surface-2);font-size:.8rem;font-weight:800;color:var(--muted)}.option.selected{border-color:var(--accent);background:var(--accent-soft)}.option.correct{border-color:var(--ok);background:var(--ok-soft);color:var(--ok);transform:none}.option.wrong{border-color:var(--bad);background:var(--bad-soft);color:var(--bad);transform:none}.option.correct .key,.option.wrong .key{background:transparent;color:inherit}.feedback{margin-top:18px;padding:16px 18px;border-radius:var(--radius-sm);font-size:.95rem;font-weight:650}.feedback.right{background:var(--ok-soft);color:var(--ok)}.feedback.wrong{background:var(--bad-soft);color:var(--bad)}.feedback.almost{background:var(--warn-soft);color:var(--warn)}.feedback .example{margin-top:10px;color:var(--text);opacity:.85;font-size:.89rem;font-weight:500}.feedback .example em{display:block;color:var(--muted);font-style:normal}.gloss{font-style:italic;border-left:3px solid currentColor;padding-left:12px;opacity:.9}.correction{margin-top:14px;padding:14px 16px;border-radius:var(--radius-sm);background:var(--surface);border:1.5px solid var(--border);color:var(--text);font-weight:500}.correction .label{display:block;font-size:.72rem;font-weight:750;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:6px}.correction p{font-size:1.02rem;line-height:1.6;margin:0}.correction .yours{margin-top:10px;padding-top:10px;border-top:1px solid var(--border);color:var(--muted);font-size:.9rem;text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--bad) 55%,transparent)}.sentence-count{font-variant-numeric:tabular-nums}.gap-sentence{font-size:1.25rem;line-height:2.1;text-align:center;margin:20px 0;font-weight:550}.blank{display:inline-block;min-width:7ch;padding:0 8px;margin:0 3px;font-weight:800;text-align:center;border-bottom:3px solid var(--accent);color:var(--accent)}.blank.right{border-color:var(--ok);color:var(--ok)}.blank.wrong{border-color:var(--bad);color:var(--bad)}.gap-clue{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;font-size:.92rem;color:var(--muted);margin-bottom:18px}.gap-form{display:flex;gap:10px}.gap-form input{flex:1;font-size:1.08rem;font-weight:650}.flashcard{min-height:280px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;cursor:pointer;text-align:center;-webkit-user-select:none;user-select:none}.flashcard .front{font-size:clamp(2rem,1.5rem + 2.6vw,2.8rem);font-weight:850;letter-spacing:-.045em}.flashcard .back{font-size:1.7rem;font-weight:750;color:var(--accent)}.flashcard .hint{font-size:.85rem;color:var(--muted);font-weight:600}.flashcard .sample{font-size:.92rem;color:var(--muted);max-width:44ch}.ratings{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-top:16px}.ratings button{padding:14px 6px;border-radius:var(--radius-sm);border:2px solid var(--border-strong);background:var(--surface);color:var(--text);cursor:pointer;font-weight:750;font-size:.9rem;display:flex;flex-direction:column;gap:3px;align-items:center;transition:transform .12s,border-color .12s}.ratings button small{font-weight:500;font-size:.71rem;color:var(--muted)}.ratings button:hover{border-color:var(--accent);transform:translateY(-2px)}.ratings button.again:hover{border-color:var(--bad)}.match-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.match-col{display:grid;gap:9px;align-content:start}.match-col h3{font-size:.72rem;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin-bottom:2px}.chip{padding:14px 16px;border-radius:var(--radius-sm);border:2px solid var(--border-strong);background:var(--surface);color:var(--text);cursor:pointer;text-align:left;font-size:.97rem;font-weight:650;transition:all .14s;overflow-wrap:anywhere}.chip:hover:not(:disabled){border-color:var(--accent);transform:translateY(-2px)}.chip.selected{border-color:var(--accent);background:var(--accent-soft)}.chip.matched{border-color:transparent;background:var(--ok-soft);color:var(--ok);cursor:default;opacity:.6;transform:none}.chip.missed{border-color:var(--bad);background:var(--bad-soft);color:var(--bad)}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.93rem}th,td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--border);white-space:nowrap}th{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:750}tbody tr:last-child td{border-bottom:none}tbody tr.clickable{cursor:pointer}tbody tr.clickable:hover{background:var(--surface-2)}td.num{text-align:right;font-variant-numeric:tabular-nums;font-weight:650}.tag{display:inline-block;font-size:.73rem;font-weight:750;padding:4px 10px;border-radius:999px;background:var(--surface-2);color:var(--muted)}.tag.learned{background:var(--ok-soft);color:var(--ok)}.tag.learning{background:var(--warn-soft);color:var(--warn)}.tag.access-active{background:var(--ok-soft);color:var(--ok)}.tag.access-trial{background:var(--accent-soft);color:var(--accent)}.tag.access-expired{background:var(--bad-soft);color:var(--bad)}.tag.access-none{background:var(--surface-2);color:var(--muted)}.code{font-family:Cascadia Mono,Consolas,monospace;font-size:1.1rem;font-weight:800;letter-spacing:.16em;padding:5px 12px;border-radius:8px;background:var(--accent-soft);color:var(--accent);border:1.5px dashed color-mix(in srgb,var(--accent) 45%,transparent)}.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(1000px 600px at 50% -10%,var(--bg-tint),var(--bg))}.auth-card{width:100%;max-width:430px}.auth-card h1{margin-bottom:6px}.auth-card>p{color:var(--muted);font-size:.95rem;margin:0 0 24px}.switch{text-align:center;margin-top:20px;font-size:.9rem;color:var(--muted)}.roles{display:grid;grid-template-columns:1fr 1fr;gap:10px}.roles button{padding:13px;border-radius:var(--radius-sm);border:2px solid var(--border-strong);background:var(--surface);color:var(--text);cursor:pointer;font-weight:750;font-size:.92rem;transition:all .14s}.roles button:disabled{opacity:.45;cursor:not-allowed}.roles button[aria-pressed=true]{border-color:transparent;background:var(--gradient);color:#fff}.hint-box{margin-top:22px;padding:14px 16px;border-radius:var(--radius-sm);background:var(--surface-2);font-size:.83rem;color:var(--muted);line-height:1.6}.hint-box b{color:var(--text)}.access-banner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:15px 18px;border-radius:var(--radius-sm);margin-bottom:22px;font-size:.93rem;font-weight:600;border:1.5px solid transparent}.access-banner.info{background:var(--accent-soft);color:var(--accent)}.access-banner.warn{background:var(--warn-soft);color:var(--warn);border-color:var(--warn)}.access-banner.error{background:var(--bad-soft);color:var(--bad);border-color:var(--bad)}.access-banner .price{font-weight:850}.access-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.access-actions .btn{background:var(--surface);border-color:currentColor;color:inherit;box-shadow:none}.paywall{text-align:center;padding:38px 26px}.paywall-price{font-size:2.6rem;font-weight:850;letter-spacing:-.045em;margin:16px 0 8px;color:var(--accent)}.subscribe-card{text-align:center}.subscribe-status{display:flex;flex-direction:column;gap:3px;padding:18px;border-radius:var(--radius-sm);margin:20px 0 6px;background:var(--surface-2)}.subscribe-status b{font-size:1.2rem;font-weight:800}.subscribe-status span{font-size:.9rem;color:var(--muted)}.subscribe-status.active{background:var(--ok-soft);color:var(--ok)}.subscribe-status.trial{background:var(--accent-soft);color:var(--accent)}.subscribe-status.expired,.subscribe-status.none{background:var(--bad-soft);color:var(--bad)}.subscribe-status.active span,.subscribe-status.trial span,.subscribe-status.expired span,.subscribe-status.none span{color:inherit;opacity:.85}.add-to-list{position:relative;display:inline-block}.list-menu{position:absolute;right:0;top:calc(100% + 8px);z-index:40;min-width:232px;padding:10px;display:grid;gap:4px;background:var(--surface);border:1.5px solid var(--border-strong);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg)}.list-option{display:flex;align-items:center;gap:9px;width:100%;padding:9px 11px;border:none;border-radius:9px;background:transparent;color:var(--text);font-size:.89rem;font-weight:600;text-align:left;cursor:pointer;white-space:normal}.list-option:hover:not(:disabled){background:var(--surface-2)}.list-option.on{color:var(--ok);font-weight:750}.list-option span{width:14px;flex:none}.list-new{display:flex;gap:7px;margin-top:6px}.list-new input{font-size:.86rem;padding:8px 10px}.exam-clock{font-variant-numeric:tabular-nums;font-weight:800;padding:5px 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}.exam-clock.low{background:var(--bad-soft);color:var(--bad);animation:pulse 1s ease-in-out infinite}@keyframes pulse{50%{opacity:.55}}.save-missed{margin-top:18px}.save-missed-panel{text-align:left;border-color:var(--accent)}.save-options{display:flex;flex-wrap:wrap;gap:9px;margin-top:12px}.save-options .btn{max-width:100%}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.row.between{justify-content:space-between}.muted{color:var(--muted)}.small{font-size:.87rem}.mt{margin-top:24px}.spark{display:flex;align-items:flex-end;gap:4px;height:48px}.spark i{flex:1;min-width:6px;background:var(--gradient);border-radius:3px 3px 0 0}@media (prefers-reduced-motion: reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}.deck-card:hover,.option:hover,.btn:hover{transform:none}}@media (max-width: 640px){.page{padding:20px 16px 70px}.topbar{padding:11px 14px;gap:10px}.who{display:none}.hero{padding:24px 20px}.match-grid{gap:9px}.ratings{grid-template-columns:repeat(2,1fr)}.option:hover:not(:disabled){transform:none}}