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th{text-align:left;font-weight:600;color:var(--ink-muted);padding:10px 12px;border-bottom:1px solid var(--border)}.tbl td{padding:12px;border-bottom:1px solid var(--border)}.scroll-x{overflow-x:auto}.note-missing{font-family:var(--font-sans)}.sheet-backdrop{display:none}@media(max-width:900px){.side .lv-fix{display:none}.sheet-backdrop{display:block;position:fixed;inset:0;z-index:30;background:#00000059}.sheet{position:fixed;left:0;right:0;bottom:0;z-index:31;max-height:75vh;overflow-y:auto;border-radius:20px 20px 0 0!important;padding-bottom:max(20px,env(safe-area-inset-bottom))!important;border-bottom:none!important}.sheet__grip{align-self:center;width:40px;height:4px;border-radius:2px;background:var(--border-strong)}}@media(min-width:901px){.sheet{display:none!important}}@media(max-width:640px){.hdr .pill,.quota-chip__n{display:none}.quota-chip{padding:4px}.h1{font-size:24px}.editor textarea{padding:20px;min-height:360px}.essay-card__body{padding:20px}.nav a span{display:none}}.mock-banner a{color:inherit;font-weight:600}.avatar-btn{width:40px;height:40px;border-radius:50%;background:var(--ink);color:var(--on-ink);display:inline-flex;align-items:center;justify-content:center;font-weight:600;font-size:15px;text-decoration:none}.avatar-btn:hover{color:var(--on-ink)}.avatar-btn.active{outline:2px solid var(--brand);outline-offset:2px}.xp-chip{display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:var(--radius-pill);background:var(--gold-tint);color:var(--gold-ink);font-size:12px;font-weight:700;white-space:nowrap}.streak{display:inline-flex;align-items:center;gap:6px;min-height:40px;padding:0 14px;border-radius:var(--radius-pill);background:var(--surface-sunken);color:var(--ink-muted);font-weight:700;font-size:15px}.streak--lit{background:var(--grammar-tint);color:var(--grammar-ink)}.level-pill{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:0 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8px;border-radius:6px;background:var(--vocab-tint);color:var(--vocab-ink);font-size:12px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.clamp3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.quest-row{display:flex;flex-wrap:wrap;gap:16px;align-items:stretch}.quest-row>.daily-hero{flex:999 1 520px}.quest-side{flex:1 1 280px;display:flex;flex-direction:column;gap:16px}.daily-hero{position:relative;overflow:hidden;display:flex;flex-direction:column;gap:14px;padding:26px 28px;border-radius:var(--radius-xl);background:linear-gradient(135deg,#1f4fd1,#2c5ee6 55%,#3a6cf0);color:#fff;box-shadow:0 10px 30px -12px #1f4fd18c}.daily-hero:after{content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 70%);pointer-events:none}.daily-hero:before{content:"";position:absolute;left:-40px;bottom:-90px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(255,214,102,.28),transparent 70%);pointer-events:none}.daily-hero>*{position:relative;z-index:1}.daily-hero__kicker{display:inline-flex;align-items:center;gap:6px;padding:4px 10px 4px 8px;border-radius:999px;background:#ffffff29;font-size:13px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:#fff}.daily-hero__kicker svg{color:#ffd666}.daily-hero__hook{margin:0;font-size:30px;line-height:1.2;font-weight:700;letter-spacing:-.01em;text-wrap:balance}.daily-hero__cta{background:#fff;color:#163a9c;font-weight:700}.daily-hero__cta:hover{background:#ffd666;color:#10297a}.daily-hero__cta:focus-visible{outline:2px solid #fff;outline-offset:3px}.hero-chip{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:6px;background:#ffffff29;font-size:13px}.hero-chip--gold{background:#ffd6663d;color:#fff3c4;font-weight:600}.hero-done{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:10px;background:#ffffff2e;color:#fff;font-weight:600}.quest-card{flex:1;display:flex;flex-direction:column;gap:8px;padding:18px 20px;border-radius:var(--radius-lg);background:var(--coherence-tint);border:1px solid transparent;text-align:left;font:inherit;color:var(--ink)}.quest-card--lucky{background:var(--surface);border-color:var(--border);cursor:pointer;transition:border-color .15s,transform .15s}.quest-card--lucky:hover{border-color:var(--brand);transform:translateY(-1px)}.quest-card--lucky svg{color:var(--brand)}@media(prefers-reduced-motion:reduce){.quest-card--lucky:hover{transform:none}}.topic-rail{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:thin}.topic-card{flex:0 0 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var(--border);text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}.pcard:hover{border-color:var(--brand);color:var(--ink);transform:translateY(-2px)}@media(prefers-reduced-motion:reduce){.pcard:hover{transform:none}}.pcard__hook{font-size:18px;line-height:1.3}.pcard__text{font-size:15px;line-height:1.5;color:var(--ink-2)}.challenge-strip{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:10px 16px;border-radius:12px;background:#1a1d21;color:#e5c866;font-size:14px}.challenge-strip span{color:#d3d6db}.twist-card{border:2px dashed var(--vocab);background:var(--vocab-tint)}.twist-card--ok{border-style:solid;border-color:var(--success);background:var(--success-tint)}.twist-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;font-size:14px}.twist-list li{display:flex;align-items:center;gap:6px;color:var(--grammar-ink)}.twist-list li.ok{color:var(--success)}.reward{display:flex;flex-wrap:wrap;align-items:center;gap:14px 24px;padding:16px 20px;border-radius:var(--radius-lg);background:var(--gold-tint);color:var(--gold-ink)}.reward__xp{font-size:28px;font-weight:800;font-variant-numeric:tabular-nums}@media(max-width:640px){.daily-hero{padding:20px}.daily-hero__hook{font-size:24px}}.ob{min-height:100vh;background:var(--bg);display:flex;flex-direction:column;align-items:center;padding:0 16px 48px}.ob__top{width:100%;max-width:720px;display:flex;align-items:center;justify-content:space-between;padding:18px 0 12px}.ob__bar{width:100%;max-width:720px;height:6px;border-radius:3px;background:var(--track);overflow:hidden;margin-bottom:24px}.ob__bar span{display:block;height:100%;background:var(--brand);border-radius:3px;transition:width .3s}.ob__card{width:100%;max-width:720px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:32px}.ob-opts{display:flex;flex-direction:column;gap:10px}.ob-opt{display:flex;align-items:center;gap:14px;padding:16px 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var(--border-strong);background:var(--surface);color:var(--ink);font:inherit;font-size:17px;text-align:left;cursor:pointer}.ob-ans:hover:not(:disabled){border-color:var(--brand)}.ob-ans:disabled{cursor:default}.ob-ans__key{flex:none;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;background:var(--track);font-size:13px;font-weight:700;font-family:var(--font-sans, inherit)}.ob-ans--right{border-color:var(--success);background:var(--success-tint)}.ob-ans--wrong{border-color:var(--grammar);background:var(--grammar-tint)}.ladder{display:flex;flex-direction:column;gap:8px;padding:20px 20px 14px;border-radius:16px;background:var(--bg)}.ladder__steps{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;align-items:end;padding-top:52px}.ladder__step{position:relative;border-radius:8px 8px 4px 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var(--brand-soft)}.coach__icon{flex:none;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:var(--brand);color:#fff}.coach__vi{font-size:19px;line-height:1.4}.coach__en{font-family:var(--font-serif);font-style:italic;color:var(--ink-2)}.coach--compact{padding:14px 18px}.coach--compact .coach__icon{width:38px;height:38px;border-radius:11px}.coach--compact .coach__vi{font-size:16px}.skills{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:18px}.skill{display:flex;flex-direction:column;gap:6px}.skill__lvl{flex:none;padding:3px 10px;border-radius:999px;font-size:13px;font-weight:700}.skill__lvl--hi{background:var(--success-tint);color:var(--success)}.skill__lvl--mid{background:var(--brand-tint);color:var(--brand)}.skill__lvl--lo{background:var(--grammar-tint);color:var(--grammar-ink)}.skill__trend{display:inline-flex;align-items:center;gap:2px;font-size:13px;font-weight:700;min-width:44px;justify-content:flex-end}.skill__trend.up{color:var(--success)}.skill__trend.down{color:var(--grammar-ink)}.pbox{display:flex;flex-direction:column;gap:16px;padding:22px 24px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--border)}.pbox__kicker{color:var(--success)}.pbox__ta{width:100%;min-height:110px;padding:12px 14px;border-radius:12px;border:1px solid var(--border-strong);background:var(--surface);color:var(--ink);font:inherit;font-family:var(--font-serif);font-size:17px;line-height:1.55;resize:vertical}.pbox__ta:focus-visible{outline:2px solid var(--brand);outline-offset:1px}.pbox__out{display:flex;flex-direction:column;gap:16px;padding-top:16px;border-top:1px solid var(--border)}.pbox__cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.pbox__text{margin:0;padding:14px 16px;border-radius:12px;background:var(--bg);font-family:var(--font-serif);font-size:17px;line-height:1.6;white-space:pre-wrap}.pbox__text--ok{background:var(--success-tint)}.pb-mark{background:var(--grammar-tint);color:inherit;border-bottom:2px solid var(--grammar);padding:0 1px}.pb-mark--vocab{background:var(--vocab-tint);border-color:var(--vocab)}.pb-mark--coherence{background:var(--coherence-tint);border-color:var(--coherence)}.pb-mark--natural{background:var(--gold-tint);border-color:var(--gold)}.pb-mark sup{font-family:var(--font-sans, system-ui);font-size:10px;font-weight:700;margin-left:1px}.pbox__changes{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.pbox__changes li{display:flex;gap:10px;align-items:flex-start}.pbox__num{flex:none;width:22px;height:22px;border-radius:6px;display:grid;place-items:center;background:var(--track);font-size:12px;font-weight:700;margin-top:2px}.pbox__note{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:12px;background:var(--brand-tint);font-size:15px}.pbox__note svg{color:var(--brand);flex:none;margin-top:3px}.pbox__alt{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-radius:12px;border:1px solid var(--border)}.msg-err{padding:10px 12px;border-radius:10px;background:var(--grammar-tint);color:var(--grammar-ink);font-size:14px}.ladder__tag--span{left:0;transform:none}.ladder--compact{padding:14px 14px 10px}.ladder--compact .ladder__steps{padding-top:38px}.crowd{display:flex;flex-direction:column;gap:12px;padding:18px 20px;border-radius:16px;border:1px solid var(--border);background:var(--surface)}.crowd--wait{flex-direction:row;align-items:center;gap:10px;color:var(--ink-muted);font-size:14px;background:var(--bg);border-style:dashed}.crowd__bars{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;align-items:end;min-height:170px}.crowd__col{display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:4px;height:100%}.crowd__bar{width:100%;max-width:44px;border-radius:6px 6px 2px 2px;background:var(--track)}.crowd__col.is-goal .crowd__bar{background:repeating-linear-gradient(135deg,var(--gold-tint) 0 6px,var(--track) 6px 12px)}.crowd__col.is-me .crowd__bar{background:var(--brand)}.crowd__n{font-size:12px;color:var(--ink-muted);min-height:16px}.crowd__l{display:flex;flex-direction:column;align-items:center;font-size:13px;line-height:1.3}.crowd__l em{font-style:normal;font-size:11px;font-weight:700;color:var(--brand)}.crowd__l em.g{color:var(--gold-ink)}.lucky-wrap{position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:16px}.lucky-backdrop{position:absolute;inset:0;background:#0f121873}@property --lucky-a{syntax: "<angle>"; initial-value: 0deg; inherits: false;}.lucky{position:relative;width:100%;max-width:560px;padding:3px;border-radius:22px;background:var(--border)}.lucky.is-thinking{background:conic-gradient(from var(--lucky-a),#1f4fd1,#7c5cff,#ffd666,#2ec4b6,#1f4fd1);animation:lucky-spin 1.1s linear infinite;box-shadow:0 0 40px -6px #1f4fd18c}.lucky__in{border-radius:19px;background:var(--surface);padding:22px 24px 24px;display:flex;flex-direction:column;gap:14px;min-height:260px}.lucky__think{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center}.lucky__dice{color:var(--brand);animation:lucky-roll .9s ease-in-out infinite}.lucky__flash{min-height:22px;font-weight:600}.lucky__pick{animation:lucky-in .35s ease-out}@keyframes lucky-spin{to{--lucky-a: 360deg}}@keyframes lucky-roll{0%{transform:rotate(0)}50%{transform:rotate(180deg) scale(1.1)}to{transform:rotate(360deg)}}@keyframes lucky-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.lucky.is-thinking,.lucky__dice,.lucky__pick{animation:none}}.undo-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 8px 8px 16px;border-radius:12px;background:var(--ink);color:var(--on-ink);font-size:14px}.undo-bar .lv-btn--ghost{color:var(--on-ink)}.hidden-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.hidden-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--surface)}.essay-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}.essay-row{display:flex;align-items:center;gap:14px;padding:14px 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10px;border-radius:var(--radius-pill);background:var(--surface-sunken);color:var(--ink-muted);font-size:12px;font-weight:700}.code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px}.pre{margin:0;padding:14px;border-radius:10px;background:var(--surface-sunken);max-height:420px;overflow:auto;white-space:pre-wrap;word-break:break-word}.cmp{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,380px),1fr));gap:16px}@media(max-width:900px){.adm{flex-direction:column}.adm__side{position:static;height:auto;flex:none;flex-direction:row;flex-wrap:wrap;align-items:center;padding:10px 16px;border-right:none;border-bottom:1px solid var(--border)}.adm__nav{flex-direction:row;flex-wrap:wrap}.adm__who{display:none}.adm__top{padding:12px 16px}.adm__page{padding:20px 16px}}.utbl .lv-tag{white-space:nowrap}.content-grid{display:grid;grid-template-columns:250px minmax(0,1fr);gap:20px;align-items:start}.topic-list{position:sticky;top:16px;max-height:calc(100vh - 32px);overflow-y:auto}.tl-item{display:flex;justify-content:space-between;align-items:center;gap:8px;width:100%;min-height:38px;padding:6px 10px;border:none;border-radius:8px;background:none;font:inherit;font-size:14px;color:var(--ink);text-align:left;cursor:pointer}.tl-item:hover{background:var(--surface-sunken)}.tl-item[aria-pressed=true]{background:var(--brand-tint);color:var(--brand-strong);font-weight:600}.crow{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:flex-start;padding:16px 18px;border-radius:14px;background:var(--surface);border:1px solid var(--border)}.crow--draft{border-left:4px solid var(--gold)}.crow--hidden{opacity:.65}.st{padding:2px 8px;border-radius:6px;font-size:12px;font-weight:700}.st--draft{background:var(--gold-tint);color:var(--gold-ink)}.st--published{background:var(--success-tint);color:var(--success)}.st--hidden{background:var(--surface-sunken);color:var(--ink-muted)}.gen-panel{background:var(--vocab-tint);border-color:transparent}.gen-panel summary{list-style:none}.gen-panel summary::-webkit-details-marker{display:none}.drawer-wrap{position:fixed;inset:0;z-index:40;display:flex;justify-content:flex-end}.drawer-backdrop{position:absolute;inset:0;background:#00000059}.drawer{position:relative;width:100%;max-width:760px;height:100%;overflow-y:auto;background:var(--surface);padding:24px;display:flex;flex-direction:column;gap:16px;box-shadow:-8px 0 30px #00000026}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}.form-grid .select,.form-grid .lv-input{width:100%}.twist-fieldset{border:2px dashed var(--vocab);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:10px;margin:0}.twist-fieldset legend{padding:0 6px;font-weight:700;font-size:14px;color:var(--vocab-ink)}.answer{display:flex;flex-direction:column;gap:8px;padding:12px;border-radius:12px;border:1px solid var(--border)}.answer--ok{border-color:var(--success);background:var(--success-tint)}@media(max-width:900px){.content-grid{grid-template-columns:1fr}.topic-list{position:static;max-height:none}}.is-disabled{opacity:.5;pointer-events:none}.icon-pick{display:grid;grid-template-columns:repeat(auto-fill,40px);gap:6px}.icon-pick button{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:var(--surface);border:1px solid var(--border);color:var(--ink-muted);cursor:pointer}.icon-pick button[aria-pressed=true]{border-color:var(--tc);color:var(--tc);box-shadow:inset 0 0 0 1px var(--tc)}.fb-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,360px),1fr));gap:14px}.st--new{background:var(--gold-tint);color:var(--gold-ink)}.st--approved{background:var(--success-tint);color:var(--success)}.st--hidden{background:var(--track);color:var(--ink-muted)}