:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html,body,#root{width:100%;max-width:100%}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:block;min-width:0}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.story-page{padding:16px 0 32px;overflow-x:hidden}.story-card{padding:20px;width:100%;min-width:0}.story-header{text-align:left;margin-bottom:18px}.story-title{margin:0 0 6px;font-size:28px;letter-spacing:-.02em}.story-subtitle{margin:0;color:var(--muted);font-size:14px}.story-illustration-container{text-align:left;margin-top:18px;margin-bottom:0}.story-hero{display:flex;align-items:center;justify-content:flex-start;gap:18px;flex-wrap:wrap}.story-illustration{width:420px;height:auto;max-width:100%;display:block;margin:0;border-radius:16px;border:1px solid var(--border2);box-shadow:var(--shadow2);background:#0003}.highlight-words-container{margin:14px auto;display:flex;justify-content:flex-start;flex-wrap:wrap;max-width:900px}.highlight-span{transition:color .2s,background .2s;font-size:18px;margin-left:.35em;color:var(--text)}.highlight-span.highlighted{background-color:#6ee7ff2e;color:#f8fbff;border-radius:.16em;box-shadow:0 1px 6px #6ee7ff33;outline:1px solid rgba(110,231,255,.35);outline-offset:-1px}.ending1{color:#6ee7fff2;margin-left:0}.ending2{color:#4ade80f2;margin-left:0}.story-actions{display:flex;justify-content:left;align-items:left;gap:12px;flex-wrap:wrap;margin-top:16px}.story-chapter-switch{position:relative}.story-chapter-menu{position:absolute;bottom:100%;right:0;margin-bottom:8px;background:#070a12f2;border:1px solid var(--border2);border-radius:14px;padding:8px;display:grid;gap:6px;min-width:160px;box-shadow:var(--shadow2);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);z-index:10}.story-chapter-option{border-radius:12px;padding:8px 10px;border:1px solid var(--border);background:#ffffff0a;color:var(--text);font-size:12px;cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease}.story-chapter-option:hover{transform:translateY(-1px);background:#ffffff0f;border-color:var(--border2)}.story-chapter-option.active{border-color:#6ee7ff59;background:linear-gradient(135deg,#6ee7ff2e,#a78bfa29)}.story-action-btn{font-size:13px;padding:10px 16px}.story-play-btn{min-width:130px}.story-play-btn-large{font-size:16px;padding:14px 22px;min-width:180px;border-radius:16px}.story-reset-btn{width:42px;height:42px;padding:0;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-size:16px}.story-audio-controls{display:flex;flex-direction:column;align-items:left;justify-content:left;gap:6px;min-width:200px;text-align:left}.story-audio-label{font-size:13px;color:var(--muted);text-align:left}.story-audio-slider{width:180px;text-align:left}.story-horizontal-scroll{display:flex;gap:12px;overflow-x:auto;overflow-y:visible;padding:6px 0;margin:6px 0 0;max-width:100%;width:100%;min-width:0;scrollbar-width:auto;scrollbar-color:rgba(110,231,255,.35) transparent}.story-horizontal-scroll::-webkit-scrollbar{height:18px}.story-horizontal-scroll::-webkit-scrollbar-track{background:#ffffff05;border-radius:999px;border:1px solid rgba(255,255,255,.04)}.story-horizontal-scroll::-webkit-scrollbar-thumb{background:linear-gradient(135deg,#6ee7ffa6,#a78bfa8c);border-radius:999px;border:3px solid rgba(7,10,18,.7);box-shadow:inset 0 0 8px #6ee7ff59}.story-horizontal-scroll::-webkit-scrollbar-thumb:hover{background:linear-gradient(135deg,#6ee7ffd9,#a78bfabf)}.story-horizontal-scroll::-webkit-scrollbar-button{width:0;height:0;display:none}.story-sentence-block{display:flex;flex-direction:column;gap:6px;position:relative;flex:0 0 auto;width:max-content}.story-sentence-row{display:inline-flex;flex-wrap:nowrap;white-space:nowrap}.story-sentence-row-primary{font-size:30px!important;margin-bottom:20px}.story-sentence-row-secondary .highlight-span{color:var(--muted)}.story-sentence-row-secondary .ending1{color:#6ee7fff2}.story-sentence-row-secondary .ending2{color:#4ade80f2}.story-sentence-row-gap{margin-bottom:25px;display:flex;width:100%;justify-content:center;gap:.35em}.story-sentence-row-gap .highlight-span{margin-left:0}.story-sentence-row-small .highlight-span{font-size:15px}.story-sentence-row-grammar{margin-top:2px;position:relative}.story-grammar-toggle,.story-grammar-hide{font-size:12px;color:var(--muted);cursor:pointer;text-decoration:underline dotted;text-underline-offset:3px}.story-grammar-note{font-size:16px;color:var(--muted);white-space:pre-line}.story-grammar-panel{margin:10px 0 0;padding:8px 10px;border-radius:10px;border:1px solid var(--border2);background:#070a12a6;color:var(--muted);font-size:12px;display:inline-block;width:fit-content;max-width:min(100%,520px);white-space:normal}.story-grammar-toggle:hover,.story-grammar-hide:hover{color:var(--text)}.story-sentence-row .highlight-span:first-child{margin-left:0}.story-quiz{margin:12px auto 0;max-width:640px;text-align:center;position:relative}.story-quiz-header h2{margin:0 0 6px;font-size:22px}.story-quiz-header p{margin:0 0 12px;color:var(--muted);font-size:13px}.story-quiz-question{font-size:20px;margin-bottom:12px}.story-quiz-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.story-quiz-option{border-radius:14px;padding:12px 14px;border:1px solid var(--border);background:#ffffff0a;color:var(--text);cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease}.story-quiz-option:hover:not(:disabled){background:#ffffff0f;border-color:var(--border2);transform:translateY(-1px)}.story-quiz-option.correct{border-color:#4ade80cc;background:#4ade8033;color:#eafff3}.story-quiz-option.incorrect{border-color:#f87171cc;background:#f8717133;color:#ffecec}.story-quiz-option.disabled{opacity:.6}.story-quiz-feedback{margin-top:12px;font-size:14px;color:var(--muted)}.story-quiz-end h2{margin-bottom:6px}.story-quiz-end p{margin:0 0 16px;color:var(--text)}.story-quiz-actions{margin-top:10px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}@media(max-width:720px){.story-title{font-size:24px}.highlight-span{font-size:16px}.story-play-btn-large{width:100%;max-width:320px}.story-audio-controls{width:100%}.story-audio-slider{width:100%;max-width:320px}}@media(max-width:720px){.story-hero{flex-direction:column;align-items:stretch;gap:12px}.story-horizontal-scroll{display:flex;overflow-x:auto;overflow-y:visible;-webkit-overflow-scrolling:touch;scroll-snap-type:x mandatory;padding:8px 0}.story-sentence-row{display:inline-flex;flex-wrap:nowrap;white-space:nowrap}.story-sentence-block{flex:0 0 auto;scroll-snap-align:start}.story-sentence-row-primary{font-size:22px!important;margin-bottom:10px}.story-sentence-row-secondary .highlight-span{font-size:14px}}.image-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;padding:10px 0 18px}.image-card{text-align:center;padding:14px;border-radius:18px;border:1px solid var(--border);background:var(--card);box-shadow:var(--shadow2);position:relative}.image-card img{width:100%;height:auto;display:block;border:1px solid var(--border2);border-radius:12px;background-color:#0000002e}.caption{margin-top:10px;font-size:16px;color:var(--text);transition:color .2s ease}.image-card:hover .caption,.image-card:active .caption{color:#6ee7fff2}.popup-box{position:absolute;left:50%;bottom:calc(100% + 12px);transform:translate(-50%);background-color:#070a12f2;color:var(--text);border:1px solid rgba(110,231,255,.25);padding:8px 10px;border-radius:10px;font-size:12px;z-index:100;white-space:pre-wrap;max-width:280px;box-shadow:0 10px 24px #00000059}.quiz-container{text-align:center;padding:18px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius2);box-shadow:var(--shadow2);position:relative}.quiz-container h2{font-size:26px;margin:0 0 12px;letter-spacing:-.02em}.quiz-image{max-width:420px;width:100%;height:auto;border:1px solid var(--border2);border-radius:18px;margin:12px auto 4px;background:#0000002e;box-shadow:0 18px 34px #00000059}.quiz-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:14px}.quiz-options button{background:#ffffff0a;border:1px solid var(--border);padding:12px 14px;font-size:14px;border-radius:14px;color:var(--text);cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease}.quiz-options button:hover:not(:disabled){background:#ffffff0f;border-color:var(--border2);transform:translateY(-1px)}.quiz-options button:disabled{cursor:default}.quiz-container p{font-size:13px;color:var(--muted);margin-top:12px}.visual-dictionary{padding:12px 0 30px}.vd-home{margin-top:12px}.vd-home-inner{padding:24px;display:grid;gap:22px;text-align:center;justify-items:center}.vd-header{display:grid;gap:6px;justify-items:center}.vd-title{margin:0;font-size:34px;letter-spacing:-.03em}.vd-subtitle{margin:0;color:var(--muted);font-size:14px}.dictionary-image{width:150px;height:auto;filter:drop-shadow(0 12px 30px rgba(110,231,255,.2))}.dictionary-bounce{animation:bounce 3s ease-in-out infinite}.topic-list{width:100%;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.topic-option{border-radius:16px;padding:12px 14px;border:1px solid var(--border);background:#ffffff0a;color:var(--text);font-size:14px;font:inherit;text-align:center;cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease}.topic-option:hover{transform:translateY(-1px);background:#ffffff0f;border-color:var(--border2)}.topic-option.active{border-color:#6ee7ff59;background:linear-gradient(135deg,#6ee7ff2e,#a78bfa29)}.vd-section{display:grid;gap:16px}.vd-topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}.vd-topbar-text{display:grid;gap:6px}.vd-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}.vd-btn{font-size:13px}.vd-topic-switch{position:relative}.topic-dropdown{position:absolute;top:100%;right:0;margin-top:10px;background:#070a12f2;border:1px solid var(--border2);border-radius:16px;padding:10px;display:grid;gap:8px;min-width:240px;box-shadow:var(--shadow2);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);z-index:10}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@media(max-width:760px){.vd-title{font-size:28px}.vd-actions{justify-content:flex-start}.topic-dropdown{left:0;right:auto}}:root{--bg0: #070a12;--bg1: #0b1020;--card: rgba(255, 255, 255, .06);--card2: rgba(255, 255, 255, .08);--border: rgba(255, 255, 255, .1);--border2: rgba(255, 255, 255, .14);--text: rgba(255, 255, 255, .92);--muted: rgba(255, 255, 255, .62);--muted2: rgba(255, 255, 255, .48);--shadow: 0 20px 60px rgba(0, 0, 0, .55);--shadow2: 0 10px 30px rgba(0, 0, 0, .45);--radius: 18px;--radius2: 24px;--accent: #6ee7ff;--accent2: #a78bfa;--good: #34d399;--warn: #fbbf24;--maxw: 1160px}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;color:var(--text);background:radial-gradient(1200px 800px at 15% 10%,rgba(167,139,250,.2),transparent 55%),radial-gradient(900px 700px at 85% 18%,rgba(110,231,255,.16),transparent 55%),radial-gradient(800px 600px at 55% 90%,rgba(52,211,153,.1),transparent 55%),linear-gradient(180deg,var(--bg0) 0%,var(--bg1) 100%);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";letter-spacing:-.01em}a{color:inherit;text-decoration:none}.app-shell{min-height:100%;display:grid;grid-template-rows:auto 1fr auto}.topbar{position:sticky;top:0;z-index:40;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#060a148c;border-bottom:1px solid var(--border)}.topbar-inner{max-width:var(--maxw);margin:0 auto;padding:14px 20px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1.2fr) minmax(0,1fr);align-items:center;gap:14px}.topbar-inner>*{min-width:0}.brand{display:flex;align-items:center;gap:12px;min-width:0}.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;font-weight:800;font-size:18px;letter-spacing:-.03em;color:#000000d1;background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 70%);box-shadow:0 12px 30px #6ee7ff2e}.brand-text{min-width:0}.brand-name{font-weight:800;font-size:18px;line-height:1.1}.brand-tagline{font-size:14px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav{display:flex;justify-content:center;gap:6px;padding:6px;border:1px solid var(--border);background:#ffffff08;border-radius:999px;min-width:0}.nav-link{font-size:15px;padding:10px 12px;border-radius:999px;color:var(--muted);transition:transform .14s ease,background .14s ease,color .14s ease,border .14s ease;border:1px solid transparent}.nav-link:hover{color:var(--text);background:#ffffff0a;transform:translateY(-1px)}.nav-link.active{color:#000000d9;background:linear-gradient(135deg,#6ee7fff2,#a78bfaeb);border:1px solid rgba(255,255,255,.18)}.topbar-actions{display:flex;justify-content:flex-end;gap:10px}.authgate,.authgate-form{display:flex;align-items:center;gap:8px}.authgate-input{height:36px;min-width:190px;border-radius:999px;border:1px solid var(--border2);background:#ffffff0a;color:var(--text);padding:0 14px;font-size:12px;outline:none}.authgate-input::placeholder{color:var(--muted2)}.authgate-input:focus{border-color:#6ee7ff80;box-shadow:0 0 0 2px #6ee7ff1f}.authgate-email{font-size:12px;color:var(--muted);max-width:180px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.authgate-notice{font-size:12px;color:var(--text)}.authgate-tooltip{font-size:12px;padding:4px 8px;border-radius:999px;border:1px solid var(--border);background:#ffffff0f;color:var(--muted)}.authgate-tooltip-success{color:#6ee7fff2;border-color:#6ee7ff4d}.authgate-tooltip-error{color:#f87171;border-color:#f8717159;background:#f8717114}.status-mark-btn{font-size:12px;padding:8px 12px;min-width:130px;justify-content:center}.status-animate{animation:statusPulse .65s ease-out}@keyframes statusPulse{0%{transform:scale(.96)}50%{transform:scale(1.06)}to{transform:scale(1)}}.primary-btn,.ghost-btn{border-radius:999px;padding:10px 14px;font-size:13px;line-height:1;border:1px solid var(--border2);background:transparent;color:var(--text);cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease,filter .14s ease;-webkit-user-select:none;user-select:none}.primary-btn{border:1px solid rgba(255,255,255,.18);background:linear-gradient(135deg,#6ee7fff2,#a78bfaeb);color:#000000d1;box-shadow:0 18px 40px #6ee7ff24}.ghost-btn{background:#ffffff0a}.primary-btn:hover,.ghost-btn:hover{transform:translateY(-1px);border-color:#ffffff38}.primary-btn:active,.ghost-btn:active{transform:translateY(0);filter:brightness(.98)}.as-link{display:inline-flex;align-items:center;justify-content:center}.main{padding:26px 0 34px;min-height:100vh;overflow-x:hidden}.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;width:100%;min-width:0}.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:start;padding:26px 0 8px}.pill{display:inline-flex;align-items:center;gap:10px;padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:#ffffff08;color:var(--muted);font-size:12px;margin-bottom:14px}.hero-title{margin:0 0 10px;font-size:44px;line-height:1.06;letter-spacing:-.04em}.hero-subtitle{margin:0 0 18px;font-size:16px;line-height:1.6;color:var(--muted);max-width:56ch}.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:18px}.stats{display:flex;gap:12px;flex-wrap:wrap}.stat{border:1px solid var(--border);background:#ffffff08;border-radius:16px;padding:12px 14px;min-width:150px}.stat-k{font-weight:800;font-size:16px;letter-spacing:-.02em}.stat-v{font-size:12px;color:var(--muted);margin-top:4px}.card{border-radius:var(--radius2);border:1px solid var(--border);background:#ffffff0d;box-shadow:var(--shadow2);overflow:hidden}.card-glow{position:relative}.card-glow:before{content:"";position:absolute;inset:-2px;background:radial-gradient(600px 260px at 15% 15%,rgba(110,231,255,.22),transparent 60%),radial-gradient(520px 240px at 85% 0%,rgba(167,139,250,.22),transparent 58%);pointer-events:none;z-index:0}.card-header,.card-body{position:relative;z-index:1}.card-header{display:flex;justify-content:space-between;align-items:center;padding:16px 16px 10px;border-bottom:1px solid rgba(255,255,255,.07)}.card-title{font-weight:800;letter-spacing:-.02em}.card-chip{font-size:12px;color:var(--muted);border:1px solid rgba(255,255,255,.1);background:#00000029;padding:6px 10px;border-radius:999px}.card-body{padding:14px 16px 16px}.progress-label{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-bottom:8px}.progress-track{height:10px;border-radius:999px;background:#ffffff12;border:1px solid rgba(255,255,255,.08);overflow:hidden}.progress-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,#34d399e6,#6ee7ffe6)}.mini-grid{margin-top:14px;display:grid;grid-template-columns:1fr;gap:10px}.mini{border:1px solid rgba(255,255,255,.1);background:#ffffff08;border-radius:16px;padding:12px}.mini-k{font-weight:800;letter-spacing:-.02em}.mini-v{color:var(--muted);font-size:12px;margin-top:3px}.mini-link{display:inline-block;margin-top:8px;font-size:12px;color:#6ee7fff2}.mini-link:hover{text-decoration:underline}.divider{height:1px;background:#ffffff14;margin:14px 0}.hint{display:flex;gap:10px;align-items:center;border:1px solid rgba(255,255,255,.1);background:#0000002e;padding:10px 12px;border-radius:14px}.hint-dot{width:10px;height:10px;border-radius:999px;background:radial-gradient(circle at 30% 30%,#6ee7fff2,#a78bfad9);box-shadow:0 10px 24px #6ee7ff29}.hint-text{font-size:12px;color:var(--muted)}.home-grid{margin-top:18px;display:grid;grid-template-columns:minmax(0,1fr);gap:16px;max-width:760px;margin-left:auto;margin-right:auto}.home-card{min-height:100%}.home-story-card{display:block;color:inherit;position:relative;overflow:visible}.home-story-card .card-header{z-index:6}.home-story-card .card-body{z-index:1}.home-story-link{display:block;color:inherit;text-decoration:none}.home-story-title-link{color:inherit;text-decoration:none}.home-chapter-switch{position:relative}.home-chapter-btn{font-size:16px;padding:6px 12px}.home-chapter-menu{position:absolute;top:100%;right:0;margin-top:10px;background:#070a12f2;border:1px solid var(--border2);border-radius:14px;padding:8px;display:grid;gap:6px;min-width:160px;box-shadow:var(--shadow2);z-index:200}.home-chapter-option{border-radius:12px;padding:8px 10px;border:1px solid var(--border);background:#ffffff0a;color:var(--text);font-size:12px;cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease}.home-chapter-option:hover{transform:translateY(-1px);background:#ffffff0f;border-color:var(--border2)}.home-chapter-option.active{border-color:#6ee7ff59;background:linear-gradient(135deg,#6ee7ff2e,#a78bfa29)}.home-story-image{width:100%;border-radius:16px;border:1px solid var(--border2);box-shadow:var(--shadow2);margin-bottom:12px}.home-story-title{font-size:22px}.home-story-caption{font-size:22px;font-weight:700;letter-spacing:-.01em}.home-random-next{padding:6px 10px;font-size:12px}.home-word-row{display:flex;justify-content:space-between;align-items:center}.home-word-fi{font-size:22px;font-weight:800;letter-spacing:-.02em}.home-word-en{color:var(--muted);font-size:14px}.home-word-example{margin-top:12px}.home-quick-quiz{margin-top:16px;display:flex;justify-content:center;gap:32px;flex-wrap:wrap}.home-quick-callout{font-size:18px;font-weight:700;letter-spacing:-.01em;color:var(--text);align-self:center}.home-quick-cta{font-size:18px;padding:12px;display:inline-flex;flex-direction:row;align-items:center;gap:5px}.home-quick-label{font-size:17px;font-weight:700}.home-quick-meta{font-size:17px;color:#0000009e}.home-quick-quiz .primary-btn .home-quick-meta{color:#0000009e}.home-quick-quiz .ghost-btn .home-quick-meta,.muted{color:var(--muted)}.footer{border-top:1px solid var(--border);background:#060a1473;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.footer-inner{max-width:var(--maxw);margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.footer-left{display:flex;align-items:center;gap:10px}.footer-brand{font-weight:800;letter-spacing:-.02em}.footer-sep{color:#ffffff38}.footer-right{display:flex;gap:14px;flex-wrap:wrap}.footer-link{color:var(--muted);font-size:12px}.footer-link:hover{color:var(--text);text-decoration:underline}@media(max-width:980px){.topbar-inner{grid-template-columns:1fr;gap:12px}.nav{justify-content:flex-start;overflow-x:auto}.topbar-actions{justify-content:flex-start}.hero{grid-template-columns:1fr}.hero-title{font-size:36px}.home-grid{grid-template-columns:1fr}}.quiz-shell{padding:10px 0 0;font-size:18px}.quiz-header{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin:10px 0 14px}.quiz-eyebrow{color:var(--muted);font-size:22px;margin-bottom:4px}.quiz-title{margin:0;font-size:34px;letter-spacing:-.03em}.quiz-header-actions{display:flex;gap:10px}.quiz-header-actions .ghost-btn{font-size:16px}.quiz-card{border-radius:var(--radius2);position:relative}.quiz-copy{margin:0 0 14px;color:var(--muted);font-size:18px;line-height:1.6}.quiz-note{font-size:14px}.floating-feedback{position:absolute;font-size:18px;background:#070a12f2;padding:10px 14px;border-radius:12px;border:1px solid rgba(110,231,255,.35);box-shadow:0 0 16px #6ee7ff40;z-index:10;transform:translate(-50%,-50%);animation:fadeout 1.5s ease forwards;pointer-events:none}@keyframes fadeout{0%{opacity:1}80%{opacity:1}to{opacity:0}}.quiz-card .card-title{font-size:24px}.quiz-card .card-chip{font-size:14px}.quiz-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}.jump-backdrop{position:fixed;inset:0;background:#070a12a6;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;z-index:60;padding:20px}.jump-dialog{width:min(420px,100%);border-radius:18px;border:1px solid var(--border2);background:#0a101cf2;box-shadow:var(--shadow2);padding:18px;display:grid;gap:14px}.jump-header{display:flex;justify-content:space-between;align-items:baseline;gap:12px}.jump-title{font-size:18px;font-weight:700}.jump-subtitle{font-size:12px;color:var(--muted)}.jump-controls{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center}.jump-step{width:42px;height:42px;padding:0;font-size:18px}.jump-input{height:42px;border-radius:12px;border:1px solid var(--border2);background:#ffffff0d;color:var(--text);text-align:center;font-size:16px;outline:none}.jump-input:focus{border-color:#6ee7ff80;box-shadow:0 0 0 2px #6ee7ff26}.jump-error{color:#f87171;font-size:12px}.jump-actions{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}.question{padding:14px;border:1px solid rgba(255,255,255,.1);background:#ffffff08;border-radius:18px}.question-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.question-label{font-size:12px;color:var(--muted);margin-bottom:6px}.question-word{font-size:40px;font-weight:900;letter-spacing:-.04em;line-height:1}.question-examples{margin-top:10px;border-top:1px solid rgba(255,255,255,.08);padding-top:10px}.fi-tooltip-line{font-size:13px;color:#ffffffdb;line-height:1.55}.fi-token{border-radius:8px}.fi-token.has-tr{padding:2px 4px;margin:-2px 0;border:1px solid rgba(255,255,255,.08);background:#ffffff08;cursor:help}.fi-token.has-tr:hover{border-color:#6ee7ff38;background:#6ee7ff0f}.question-ex-en{margin-top:6px;font-size:12px;color:var(--muted)}.options{margin-top:12px;display:grid;grid-template-columns:1fr 1fr;gap:10px}.option-btn{width:100%;text-align:left;padding:12px;border-radius:16px;border:1px solid rgba(255,255,255,.12);background:#ffffff08;color:var(--text);cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease,filter .14s ease;box-shadow:0 12px 28px #00000038}.option-btn:hover:not(:disabled){transform:translateY(-1px);border-color:#fff3;background:#ffffff0d}.option-btn:disabled{cursor:default;opacity:.92}.option-btn.selected{border-color:#6ee7ff4d;background:#6ee7ff0f}.option-btn.correct{border-color:#34d39966;background:#34d3991a;box-shadow:0 18px 44px #34d3991a}.option-btn.incorrect{border-color:#f8717173;background:#f871711a;box-shadow:0 18px 44px #f871711a}.result-row{margin-top:10px;min-height:22px}.result{font-weight:900;letter-spacing:-.02em}.correct-text{color:#34d399f2}.incorrect-text{color:#f87171f2}.audio-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:999px;border:1px solid rgba(255,255,255,.14);background:#ffffff0a;color:var(--text);cursor:pointer;transition:transform .14s ease,background .14s ease,border .14s ease,filter .14s ease;white-space:nowrap;height:fit-content}.audio-btn:hover:not(:disabled){transform:translateY(-1px);border-color:#ffffff38;background:#ffffff0f}.audio-btn:disabled{opacity:.55;cursor:not-allowed}.audio-icon{font-size:14px;opacity:.9}.audio-text{font-size:12px;color:var(--muted)}.quiz-done{position:relative;overflow:hidden}.quiz-celebration{position:absolute;inset:0;pointer-events:none}.celebration-emoji{position:absolute;font-size:22px;opacity:0;animation:celebration-float 3.5s ease-out forwards;filter:drop-shadow(0 6px 12px rgba(0,0,0,.3))}@keyframes celebration-float{0%{transform:translateY(10px) scale(.95);opacity:0}15%{opacity:1}70%{opacity:.9}to{transform:translateY(-90px) scale(1.1);opacity:0}}.quiz-done .done-title{margin:0 0 8px;font-size:26px;letter-spacing:-.03em}.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:14px}.preview-item{border:1px solid rgba(255,255,255,.1);background:#ffffff08;border-radius:18px;padding:12px}.preview-top{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.preview-fi{font-weight:900;letter-spacing:-.03em;font-size:16px}.preview-en{margin-top:2px;color:var(--muted);font-size:13px}.preview-ex{margin-top:10px;padding-top:10px;border-top:1px solid rgba(255,255,255,.08)}.preview-ex-en{margin-top:6px;font-size:12px;color:var(--muted)}@media(max-width:760px){.options,.preview-grid{grid-template-columns:1fr}.question-word{font-size:34px}}