:root{color-scheme:light;--ink:#192c4a;--muted:#718096;--paper:#f6f4ef;--white:#fff;--blue:#315fe8;--blue-dark:#2047be;--orange:#f5824b;--line:#e9e7e1;--shadow:0 18px 55px rgba(25,44,74,.08)}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;min-height:100vh}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible{outline:3px solid #87a5ff;outline-offset:3px}.shell{max-width:1120px;margin:0 auto;padding:24px 26px 52px}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:30px}.brand{display:flex;align-items:center;gap:11px;font-weight:850;letter-spacing:-.04em;font-size:20px}.brand i{font-style:normal;color:var(--orange)}.brand-mark{width:38px;height:38px;display:grid;place-items:center;background:var(--ink);border-radius:13px;color:white;font-size:31px;line-height:1}.tiny-pill{font-size:12px;color:#556477;background:#e9e7e1;border-radius:99px;padding:7px 11px;font-weight:700}.hero{position:relative;overflow:hidden;border-radius:28px;background:var(--ink);color:white;padding:clamp(27px,5vw,54px);box-shadow:var(--shadow)}.hero:before,.hero:after{content:"";position:absolute;border:1px solid #ffffff1a;border-radius:50%;pointer-events:none}.hero:before{width:290px;height:290px;right:-54px;top:-120px}.hero:after{width:190px;height:190px;right:28px;top:-66px}.hero-label{color:#ffba8e;font-size:12px;letter-spacing:.14em;font-weight:850}.hero h1{font-size:clamp(30px,5vw,52px);line-height:1.08;letter-spacing:-.045em;margin:13px 0 12px;max-width:650px}.hero p{color:#ccd5e2;font-size:16px;line-height:1.7;max-width:610px;margin:0}.hero-bottom{display:flex;align-items:center;gap:10px;margin-top:23px;color:#d6e1f4;font-size:13px}.hero-bottom span:first-child{font-size:21px;color:#ffad78}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:12px;margin:36px 2px 16px}.section-heading h2{font-size:20px;margin:0;letter-spacing:-.025em}.section-heading p{font-size:13px;color:var(--muted);margin:5px 0 0}.mode-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:18px}.mode-card{display:flex;gap:14px;align-items:center;text-align:left;border:1px solid var(--line);background:#fff;border-radius:18px;padding:17px 18px;color:var(--ink);transition:.18s;box-shadow:0 4px 14px #192c4a06}.mode-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.mode-card.selected{border:2px solid var(--blue);padding:16px 17px;background:#f8faff}.mode-icon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;flex:none;background:#e9efff;color:var(--blue);font-size:20px}.mode-card[data-mode=hard] .mode-icon{background:#fff0e7;color:#d76731}.mode-card b{display:block;font-size:15px}.mode-card small{display:block;color:var(--muted);font-size:12px;margin-top:3px;line-height:1.45}.checkmark{margin-left:auto;opacity:0;color:var(--blue);font-weight:900}.mode-card.selected .checkmark{opacity:1}.set-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.set-card{display:flex;flex-direction:column;align-items:stretch;text-align:left;border:1px solid var(--line);background:#fff;border-radius:20px;padding:20px 21px;color:var(--ink);min-height:174px;box-shadow:0 5px 18px #192c4a06;transition:.18s}.set-card:hover{transform:translateY(-3px);border-color:#cdd8f8;box-shadow:var(--shadow)}.set-top,.set-foot{display:flex;align-items:center;justify-content:space-between;gap:10px}.set-number{width:34px;height:34px;display:grid;place-items:center;background:#edf1f8;font-size:13px;font-weight:900;border-radius:11px}.set-chip{font-size:11px;font-weight:750;color:#718096;background:#f4f5f7;border-radius:99px;padding:6px 9px}.set-card h3{font-size:18px;line-height:1.28;letter-spacing:-.02em;margin:18px 0 6px}.set-card p{font-size:13px;color:var(--muted);margin:0}.set-foot{margin-top:auto;padding-top:18px;font-size:12px;color:#758198}.arrow{color:var(--blue);font-size:18px;font-weight:900}.score-note{background:#fff;border:1px solid var(--line);border-radius:15px;margin-top:18px;padding:13px 16px;color:var(--muted);font-size:12px;line-height:1.55}.score-note strong{color:var(--ink)}.footer{text-align:center;padding:28px 0 0;color:#9aa3af;font-size:11px}
.quiz-wrap{max-width:760px;margin:0 auto}.back-btn{display:inline-flex;align-items:center;gap:8px;border:0;background:transparent;padding:8px 0;color:#596b83;font-weight:750;font-size:13px}.back-btn:hover{color:var(--blue)}.quiz-head{margin:13px 0 15px;display:flex;align-items:end;justify-content:space-between;gap:14px}.quiz-kicker{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:900}.quiz-head h1{font-size:clamp(24px,4vw,34px);margin:6px 0 0;line-height:1.15;letter-spacing:-.04em}.mode-badge{border-radius:99px;padding:8px 11px;font-size:11px;font-weight:850;white-space:nowrap;background:#e9efff;color:#315fe8}.mode-badge.hard{background:#fff0e7;color:#bd5d2d}.progress-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-bottom:9px}.progress-track{height:7px;background:#e4e6eb;border-radius:99px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,#315fe8,#8a70ed);border-radius:99px;transition:width .25s}.quiz-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:clamp(20px,4vw,34px);margin-top:20px;box-shadow:var(--shadow)}.question-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.question-number{font-size:12px;color:#8993a1;font-weight:750}.sound-actions{display:flex;gap:8px}.sound-btn{display:inline-flex;align-items:center;gap:7px;border:1px solid #dfe5f3;background:#f7f9ff;color:#315fe8;border-radius:11px;padding:9px 11px;font-size:12px;font-weight:800}.sound-btn:hover{background:#edf2ff}.sound-btn.secondary{background:#fff;color:#65738a;border-color:var(--line)}.sentence{font-size:clamp(18px,3vw,23px);line-height:1.8;letter-spacing:-.02em;margin:29px 0 25px;color:#27354a}.blank{display:inline-flex;align-items:center;vertical-align:baseline;justify-content:center;min-width:92px;max-width:100%;height:1.68em;margin:0 3px;border-bottom:2px solid #8fa7dc;background:#f5f7fb;border-radius:5px 5px 0 0;color:var(--blue);font-size:.79em;padding:0 8px;font-weight:850}.answer-label{font-size:11px;font-weight:850;letter-spacing:.08em;color:#8a94a3;margin-bottom:9px}.answer-input{width:100%;border:1.5px solid #dce1e9;border-radius:13px;padding:14px 15px;font-size:17px;color:var(--ink);background:white}.answer-input::placeholder{color:#a6afbd}.option-list{display:grid;grid-template-columns:1fr 1fr;gap:9px}.option-btn{border:1.5px solid #e1e5ec;border-radius:12px;padding:12px 14px;text-align:left;background:#fff;color:var(--ink);font-weight:700;transition:.15s}.option-btn:hover{border-color:#8ea8f8;background:#f8faff}.option-btn.chosen{border-color:var(--blue);background:#eef3ff;color:var(--blue)}.option-btn:disabled{cursor:default}.feedback{display:none;margin-top:14px;border-radius:12px;padding:12px 14px;font-size:13px;line-height:1.55}.feedback.show{display:block}.feedback.good{background:#dff4e9;color:#167a4e}.feedback.bad{background:#fff0ed;color:#c34e3f}.quiz-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:24px}.text-btn{background:transparent;border:0;color:#778399;padding:11px 0;font-size:13px;font-weight:750}.text-btn:disabled{opacity:.35;cursor:not-allowed}.primary-btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:0;border-radius:12px;background:var(--blue);color:white;padding:13px 18px;font-size:13px;font-weight:850;box-shadow:0 5px 13px #315fe833;transition:.15s}.primary-btn:hover{background:var(--blue-dark);transform:translateY(-1px)}.hint-row{display:flex;justify-content:center;margin-top:15px;color:#8993a1;font-size:11px}.result-card{text-align:center;padding:34px}.result-icon{width:70px;height:70px;display:grid;place-items:center;border-radius:22px;background:#edf2ff;color:var(--blue);font-size:32px;margin:0 auto 17px}.result-card h2{font-size:28px;margin:0 0 7px;letter-spacing:-.04em}.result-card p{color:var(--muted);margin:0;line-height:1.6}.result-score{font-size:48px;font-weight:950;letter-spacing:-.06em;margin:20px 0 2px}.result-score span{font-size:20px;color:#9ba4b1}.result-sub{font-size:12px;color:#8a94a3}.missed-list{display:grid;gap:8px;text-align:left;margin:22px 0 0}.missed-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 13px;border-radius:11px;background:#fff6f3;color:#6f514d;font-size:12px}.missed-row strong{color:#b04b3d}.result-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:24px}.hidden{display:none!important}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%,15px);opacity:0;pointer-events:none;background:#192c4a;color:#fff;padding:11px 16px;border-radius:99px;font-size:12px;box-shadow:var(--shadow);transition:.2s;z-index:10}.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:650px){.shell{padding:16px 15px 38px}.topbar{margin-bottom:20px}.hero{border-radius:22px}.hero:before{right:-150px}.hero:after{right:-80px}.section-heading{margin-top:29px}.set-grid{grid-template-columns:1fr;gap:10px}.set-card{min-height:150px;padding:17px}.mode-row{gap:8px}.mode-card{padding:14px 12px;gap:10px}.mode-card.selected{padding:13px 11px}.mode-icon{width:35px;height:35px}.mode-card small{font-size:11px}.mode-card b{font-size:14px}.quiz-card{border-radius:19px}.quiz-head{align-items:start}.sound-actions{gap:5px}.sound-btn{padding:8px 9px}.sentence{line-height:1.7;margin:23px 0}.option-list{grid-template-columns:1fr}.result-card{padding:26px 19px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}
.mixed-card{grid-column:1/-1;border-color:#f2c7a9;background:linear-gradient(115deg,#fffaf5,#fff)}.mixed-card .set-number{background:#fff0e7;color:#c76735}

.quiz-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}.quiz-toolbar-actions{display:flex;align-items:center;gap:10px}.save-status{font-size:11px;color:var(--muted)}.restart-btn{border:1px solid var(--line);background:#fff;border-radius:99px;padding:8px 13px;color:var(--ink);font-size:12px;font-weight:750}.restart-btn:hover{border-color:var(--blue);color:var(--blue)}@media(max-width:650px){.save-status{display:none}.quiz-toolbar{margin-bottom:5px}}