.challengeShell{color:#122033;min-height:100vh;padding:max(22px, env(safe-area-inset-top)) 18px max(28px, env(safe-area-inset-bottom));background:radial-gradient(circle at 18% 18%,#1d4f8f29,#0000 32%),linear-gradient(#f9fbff 0%,#eef4fb 100%);align-items:center;display:grid}.challengeCard{background:#fffffff0;border:1px solid #dbe4ef;border-radius:24px;gap:16px;width:100%;max-width:480px;margin:0 auto;padding:24px;display:grid;box-shadow:0 22px 52px #14253e1f}.challengeBrand{align-items:center;gap:10px;display:flex}.challengeBrand span{color:#1d4f8f;background:#e8f1ff;border-radius:999px;padding:8px 12px;font-size:13px;font-weight:900}.challengeBrand strong{color:#617080;font-size:14px}.challengeLoading{color:#617080;text-align:center;padding:24px 0;font-size:15px;font-weight:700}.challengeProgress{color:#617080;justify-content:space-between;font-size:13px;font-weight:800;display:flex}.challengeCategory{color:#1d4f8f;margin:0;font-size:13px;font-weight:900}.challengeQuestionText{color:#122033;white-space:pre-wrap;margin:0;font-size:16px;font-weight:700;line-height:1.75}.challengePrompt{color:#617080;margin:0;font-size:13px;font-weight:800}.challengeAnswerRow{grid-template-columns:1fr 1fr;gap:12px;display:grid}.challengeAnswerButton{cursor:pointer;touch-action:manipulation;background:#fff;border:2px solid #d8e2ee;border-radius:18px;min-height:84px;font-size:32px;font-weight:900}.challengeAnswerButton.circle{color:#1d6f42}.challengeAnswerButton.cross{color:#b3261e}.challengeAnswerButton:active{transform:scale(.97)}.challengeFeedback{gap:10px;display:grid}.challengeJudge{border-radius:14px;margin:0;padding:12px 14px;font-size:16px;font-weight:900}.challengeJudge.correct{color:#1d6f42;background:#eaf7ee}.challengeJudge.incorrect{color:#b3261e;background:#fdecea}.challengeJudgmentPoint{color:#425466;margin:0;font-size:14px;font-weight:700;line-height:1.7}.challengeNextButton{color:#fff;cursor:pointer;touch-action:manipulation;background:linear-gradient(#245a9c,#173f73);border:none;border-radius:16px;min-height:54px;font-size:16px;font-weight:900;box-shadow:0 12px 28px #173f7338}.challengeResult{text-align:center;gap:14px;display:grid}.challengeResultScore{color:#1d4f8f;margin:0;font-size:30px;font-weight:900}.challengeResultMessage{color:#425466;margin:0;font-size:15px;font-weight:700;line-height:1.75}.challengeCtaButton{color:#fff;cursor:pointer;background:linear-gradient(#245a9c,#173f73);border-radius:16px;min-height:54px;font-size:15px;font-weight:900;line-height:54px;text-decoration:none;display:block;box-shadow:0 12px 28px #173f7338}.challengeDisclaimer{color:#8a93a6;margin:6px 0 0;font-size:10.5px;line-height:1.7}