:root{--navy:#081a33;--ink:#15283b;--muted:#52677a;--green:#167846;--line:#d4dfe7;--paper:#f1f5f8;--blue:#3c688e;--mint:#eaf6ee;font-family:system-ui,-apple-system,'Segoe UI',sans-serif;color:var(--ink);background:var(--paper);font-size:16px}
*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:default}a{color:var(--blue)}a:focus-visible,button:focus-visible{outline:3px solid #1c76bf;outline-offset:3px}h2:focus{outline:none}[hidden]{display:none!important}.top{background:var(--navy);border-bottom:3px solid var(--green)}.top-inner{max-width:880px;margin:auto;min-height:58px;padding:8px 24px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{color:white;font-size:21px;font-weight:850;text-decoration:none;letter-spacing:-.7px}.brand span{color:#72d29a}.back{color:white;font-size:14px;text-decoration:none;min-height:40px;display:flex;align-items:center}.shell{width:min(590px,calc(100% - 32px));margin:24px auto 18px}.heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.eyebrow{font-size:14px;font-weight:750;color:var(--muted);margin:0 0 3px}h1{font-size:36px;line-height:1.06;letter-spacing:-1px;margin:0}h1 span{color:var(--green)}.points{background:var(--navy);color:#fff;padding:9px 13px;border-radius:22px;font-size:14px;white-space:nowrap}.points>span:first-child{color:#94dfaf}.points b{font-size:17px}.topic{font-size:16px;margin:9px 0 16px;color:var(--muted)}.game{background:#fff;border:1px solid var(--line);border-radius:19px;padding:24px;box-shadow:0 8px 24px #081a3308}.round-head{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:14px;font-weight:750}.round-head>span:last-child{color:var(--green)}.track{display:flex;gap:7px;margin:12px 0 21px}.track span{flex:1;height:7px;border-radius:5px;background:#e1e8ee}.track .correct{background:var(--green)}.track .revisit{background:#b56b19}.track .current{background:var(--blue)}.area{font-size:14px;color:var(--muted);margin:0 0 6px}h2{font-size:25px;line-height:1.25;letter-spacing:-.4px;margin:0 0 20px;min-height:63px}.options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.option{border:2px solid #ccd9e2;border-radius:12px;background:white;color:var(--ink);display:flex;align-items:center;gap:10px;text-align:left;font-size:18px;font-weight:650;line-height:1.25;padding:12px;min-height:79px;overflow-wrap:break-word}.letter{font-size:14px;color:var(--muted);align-self:flex-start;padding-top:2px;flex-shrink:0}.option:hover:not(:disabled){border-color:var(--blue);background:#f1f6fa}.option.correct{color:#115b34;background:var(--mint);border-color:var(--green)}.option.wrong{color:#76430b;background:#fff3e3;border-color:#b87928}.option:disabled{opacity:1}.option .letter{color:inherit}.feedback-slot{min-height:103px;padding:15px 0 11px;display:flex;align-items:center}.feedback-slot>div{font-size:16px;line-height:1.35;width:100%}.feedback-slot strong{display:block;margin-bottom:3px;color:var(--green)}.feedback-slot .retry strong{color:#855111}.primary{display:block;width:100%;min-height:48px;border:0;border-radius:10px;padding:11px 16px;background:var(--green);color:white;font-weight:750;font-size:17px}.primary:disabled{background:#e8eef2;color:#586c7c}.primary:hover:not(:disabled){background:#11623a}.under-game{display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:14px;color:var(--muted);margin-top:8px}.under-game button{font-size:14px;border:0;padding:8px 0;background:transparent;color:var(--blue);min-height:40px;text-decoration:underline;text-underline-offset:3px}.save-note{font-size:13px;color:var(--muted);margin:0;text-align:center}.save-note.warning{color:#855111}.help{background:white;border:1px solid var(--line);border-radius:12px;margin-top:12px;padding:15px 18px;font-size:16px;line-height:1.5}.help p{margin:0 0 12px}.help p:last-child{margin:0}.results{text-align:center}.finish-icon{display:grid;place-items:center;width:54px;height:54px;margin:0 auto 12px;background:var(--mint);color:var(--green);border-radius:50%;font-size:30px;font-weight:850}.results h2{min-height:0;margin-bottom:8px}.result-score{font-size:24px;font-weight:850;color:var(--green);margin:12px 0}.results>p{line-height:1.4}.results #result-message{font-size:16px;min-height:45px;margin:10px 0 16px}.progress-card{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:12px;padding:13px 8px;background:#f6f9fb;gap:8px}.progress-card>div{display:flex;flex-direction:column;gap:4px}.progress-card>div+div{border-left:1px solid var(--line)}.progress-card strong{font-size:23px}.progress-card span{font-size:14px;color:var(--muted)}.review-message{font-size:16px;color:var(--muted);margin:17px 0}.done{display:inline-flex;min-height:44px;align-items:center;font-size:16px;margin-top:6px}
@media(max-width:600px){.top-inner{min-height:47px;padding:3px 16px}.brand{font-size:19px}.shell{width:calc(100% - 24px);margin:13px auto 10px}.eyebrow{font-size:13px}h1{font-size:30px}.points{padding:7px 11px}.topic{font-size:14px;margin:7px 0 11px}.game{padding:16px;border-radius:15px}.track{margin:9px 0 14px}.area{font-size:14px;margin-bottom:5px}h2{font-size:22px;min-height:56px;margin-bottom:14px}.option{min-height:77px;padding:10px 8px;gap:7px;font-size:17px}.options{gap:8px}.feedback-slot{min-height:98px;padding:12px 0 9px}.primary{min-height:47px}.under-game{margin-top:3px}.results #result-message{margin:8px 0 13px}.review-message{margin:13px 0}}
@media(max-width:380px){.shell{width:calc(100% - 20px)}.game{padding:13px}.option{font-size:16px;gap:5px;min-height:81px}h2{font-size:21px}.round-head{font-size:13px}}
@media(max-height:690px) and (max-width:600px){.shell{margin-top:8px}.top-inner{min-height:43px}.back{min-height:36px}.heading h1{font-size:27px}.topic{margin-bottom:9px}.game{padding:13px}.track{margin:8px 0 10px}h2{margin-bottom:10px;min-height:53px}.option{min-height:72px;padding:8px 7px}.feedback-slot{min-height:89px;padding:9px 0}.finish-icon{width:43px;height:43px;font-size:25px;margin-bottom:9px}.results #result-message{min-height:0}.progress-card{padding:10px 6px}.results .result-score{margin:9px 0}}
@media(prefers-reduced-motion:no-preference){.option{transition:border-color .12s,background-color .12s}.finish-icon{animation:arrive .3s ease-out}@keyframes arrive{from{transform:scale(.85)}to{transform:scale(1)}}}
.mobile-back{display:none}
@media(max-width:600px){.top{display:none}.heading .title{flex:1}.heading{gap:9px}.mobile-back{display:grid;place-items:center;flex:0 0 40px;min-height:44px;text-decoration:none;color:var(--navy);background:white;border:1px solid var(--line);border-radius:10px;font-size:23px}.area{display:none}h2{min-height:54px}.track{margin-bottom:14px}.option{min-height:70px}.feedback-slot{min-height:92px}.topic{margin-top:9px}}
@media(max-height:690px) and (max-width:600px){.eyebrow{font-size:12px}.topic{margin-top:6px;margin-bottom:8px}.game{padding:12px}.option{min-height:65px}h2{font-size:20px;min-height:50px;margin-bottom:9px}.track{margin-bottom:10px}.feedback-slot{min-height:82px;font-size:16px}.save-note:not(.warning){position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.results .review-message{font-size:15px}}