:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",Meiryo,sans-serif;color:#233047;background:#fbfcff;font-synthesis:none;-webkit-font-smoothing:antialiased;--ink:#223047;--muted:#677387;--violet:#6859df;--violet-dark:#5141bd;--violet-pale:#f0edff;--mint:#e8fbf4;--line:#e4e8f0;--shadow:0 18px 50px rgba(51,58,106,.06)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.46}button:focus-visible,input:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #08aa91;outline-offset:4px}a{color:var(--violet-dark)}.skip{position:absolute;left:-9999px;top:8px;background:white;padding:12px;z-index:100}.skip:focus{left:10px}.container{width:min(1100px,calc(100% - 44px));margin-inline:auto}.site-header{height:76px;display:flex;align-items:center;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;backdrop-filter:blur(14px)}.header-inner,.main-nav,.brand{display:flex;align-items:center}.header-inner{justify-content:space-between;gap:20px}.brand{font-size:19px;font-weight:850;color:var(--ink);text-decoration:none;gap:10px;white-space:nowrap}.brand-mark{width:36px;height:36px;display:grid;place-items:center;border-radius:12px;background:var(--violet);color:white;font-size:23px}.brand-accent{color:var(--violet)}.main-nav{gap:7px}.main-nav button{background:transparent;border:0;border-radius:9px;font-size:14px;font-weight:700;color:#4a5570;padding:12px 15px}.main-nav button:hover,.main-nav button[aria-current="page"]{background:var(--violet-pale);color:var(--violet-dark)}.page{padding:30px 0 86px}.page[hidden],[hidden]{display:none!important}.hero{border-radius:25px;background:linear-gradient(116deg,#f1eeff 0%,#f7f4ff 51%,#e2faf4 100%);min-height:470px;padding:58px 55px;display:grid;grid-template-columns:1.2fr .8fr;gap:28px;overflow:hidden;position:relative}.hero-copy{position:relative;z-index:2}.eyebrow,.overline{text-transform:uppercase;color:var(--violet-dark);font-weight:850;letter-spacing:.07em;font-size:12px}.eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;border-radius:40px;padding:8px 14px;box-shadow:0 6px 25px #594abc12}.eyebrow-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#35cbb0}.hero h1{font-size:clamp(32px,4.2vw,52px);line-height:1.47;letter-spacing:-.045em;margin:27px 0 15px}.hero h1 span{color:var(--violet)}.hero p{font-size:16px;color:#555f79;line-height:1.95;max-width:600px;margin:0 0 26px}.action-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;gap:15px;border:1px solid transparent;border-radius:12px;padding:15px 23px;min-height:50px;font-size:14px;font-weight:800;text-decoration:none;transition:transform .16s,box-shadow .16s,background .16s}.button:hover:not(:disabled){transform:translateY(-1px)}.button-primary{background:var(--violet);color:#fff;box-shadow:0 9px 22px #6d5edd2d}.button-primary:hover:not(:disabled){background:var(--violet-dark)}.button-outline{background:#fff;color:var(--violet-dark);border-color:#dad4ff}.button-outline:hover:not(:disabled){background:#faf9ff}.button-white{background:#fff;color:var(--violet-dark)}.small-meta{display:flex;flex-wrap:wrap;gap:17px;color:#617087;font-size:12px;font-weight:750;margin-top:26px}.hero-art{position:relative;min-height:340px;display:flex;align-items:center;justify-content:center}.art-video{position:relative;background:#fff;border:9px solid #fff;box-shadow:0 30px 70px rgba(75,67,155,.18);border-radius:23px;width:min(315px,100%);height:248px;transform:rotate(-7deg);overflow:hidden}.art-video-top{display:flex;gap:5px;height:29px;align-items:center;padding-left:13px;background:#f3f2fc}.art-video-top span{width:7px;height:7px;background:#d8d2ef;border-radius:50%}.art-video-top span:first-child{background:#e8a4b0}.art-play{height:142px;background:linear-gradient(145deg,#a99efe,#6859df);display:flex;align-items:center;justify-content:center;color:white;font-size:41px}.art-bar{height:10px;background:linear-gradient(to right,#7162eb 0 62%,#e4e7f4 62% 100%);border-radius:8px;margin:15px 15px 11px}.art-line{height:8px;background:#e4e7f4;border-radius:8px;margin:0 45px 0 15px}.speech{position:absolute;background:white;border-radius:15px;box-shadow:0 12px 30px #6c5dcb29;color:#554c9b;padding:14px 20px;font-size:14px;font-weight:850;z-index:2}.speech-one{top:24px;right:-5px;transform:rotate(8deg)}.speech-two{bottom:20px;left:0;transform:rotate(6deg)}.art-spark{position:absolute;color:#51cbb4;font-size:50px}.art-spark.one{top:30px;left:10px}.art-spark.two{bottom:22px;right:14px}.notice,.info-strip{font-size:13px;line-height:1.8;color:#5d647b;padding:17px 22px;border-radius:13px;background:#f7f8ff;border:1px solid #e9e7ff;margin:24px 0 60px}.notice strong,.info-strip strong{color:var(--violet-dark);margin-right:8px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:15px;margin:55px 0 24px}.section-heading h2{font-size:27px;line-height:1.4;letter-spacing:-.02em;margin:8px 0 0}.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.step{padding:26px 26px 28px;position:relative;background:white;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.step-no{position:absolute;right:25px;top:23px;font-size:25px;color:#dcd9fa;font-weight:850}.step-icon{display:grid;place-items:center;border-radius:13px;width:48px;height:48px;background:var(--violet-pale);color:var(--violet-dark);font-size:26px}.step h3{font-size:19px;margin:22px 0 10px}.step p,.topic-mini p{font-size:14px;line-height:1.85;color:var(--muted);margin:0}.text-link{background:transparent;border:0;color:var(--violet-dark);font-weight:800;font-size:13px}.topic-mini-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.topic-mini{display:flex;align-items:center;gap:10px;padding:20px 15px;background:#fff;border:1px solid var(--line);border-radius:13px;color:#374159;font-weight:750;font-size:14px;min-height:82px}.topic-mini span{color:var(--violet-dark);background:var(--violet-pale);font-size:11px;border-radius:7px;padding:7px}.bottom-cta{margin-top:62px;background:linear-gradient(115deg,#6355d6,#8d6ed9);color:white;border-radius:20px;padding:35px 45px;display:flex;justify-content:space-between;align-items:center;gap:22px}.bottom-cta h2{font-size:23px;margin:0 0 10px}.bottom-cta p{color:#e8e3ff;margin:0;font-size:14px}.page-intro{padding:34px 0 24px}.page-intro h1{font-size:clamp(29px,4vw,41px);line-height:1.4;letter-spacing:-.04em;margin:11px 0}.page-intro p{font-size:15px;line-height:1.9;color:var(--muted);margin:0}.info-strip{margin:14px 0 27px}.lesson-list{display:grid;gap:17px}.lesson-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:30px 32px;box-shadow:var(--shadow)}.lesson-top{display:flex;justify-content:space-between;align-items:center;gap:20px}.lesson-heading{display:flex;align-items:center;gap:13px}.lesson-number{display:grid;place-items:center;background:var(--violet-pale);color:var(--violet-dark);width:47px;height:47px;border-radius:13px;font-size:14px;font-weight:850}.lesson-card h2{font-size:21px;margin:0}.pill{border-radius:30px;padding:7px 12px;background:#f2f4fb;color:#5e6886;font-size:11px;font-weight:800;white-space:nowrap}.lesson-lead{color:#68748a;line-height:1.8;margin:20px 0 23px;font-size:14px}.lesson-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px}.lesson-col{padding:21px 24px;border-radius:13px;background:#fff9f9}.lesson-col.positive{background:#effaf6}.lesson-col h3{font-size:13px;margin:0 0 13px;color:#bf6475}.lesson-col.positive h3{color:#248871}.lesson-col ul{margin:0;padding-left:18px}.lesson-col li{line-height:1.75;margin:8px 0;font-size:14px}.lesson-col p{line-height:1.82;margin:0;font-size:14px}.lesson-reason{font-size:13px;line-height:1.8;margin-top:17px;color:#4e5b70}.lesson-note{border-top:1px solid #edf0f5;margin-top:16px;padding-top:15px;color:#7a8396;font-size:12px;line-height:1.75}.center-cta{text-align:center;padding:45px 0 10px}.center-cta p{color:var(--muted);font-size:14px}.exam-card,.result-hero,.prose-panel{border:1px solid var(--line);background:#fff;border-radius:22px;padding:48px;box-shadow:var(--shadow);max-width:860px;margin:18px auto}.exam-start{text-align:center}.round-icon{display:grid;place-items:center;margin:0 auto 18px;border-radius:50%;width:70px;height:70px;background:var(--violet-pale);color:var(--violet-dark);font-size:32px}.exam-start h2{font-size:27px;margin:12px 0}.exam-start>p{color:var(--muted);line-height:1.9;max-width:570px;margin:0 auto}.exam-facts{display:flex;justify-content:center;gap:50px;background:#f8f8fe;padding:23px 10px;border-radius:15px;margin:29px auto;max-width:550px}.exam-facts>div{display:grid;gap:4px}.exam-facts strong{font-size:33px;color:var(--violet)}.exam-facts small{font-size:11px;color:var(--muted)}.exam-start .fineprint{max-width:620px;margin:20px auto 0}.fineprint{font-size:12px!important;color:#80899b!important;line-height:1.9!important}.question-head{display:flex;align-items:center;justify-content:space-between;gap:15px}.question-number{color:var(--violet-dark);font-weight:850;font-size:14px}.progress-track{background:#edf0f8;height:7px;border-radius:20px;margin:20px 0 36px;overflow:hidden}.progress-track>div{height:100%;background:linear-gradient(to right,#6355db,#48c5ad);width:0;transition:width .25s}.question-text{font-size:23px;line-height:1.7;letter-spacing:-.01em;margin:0 0 28px}.answer-options{margin:0;border:0;padding:0;display:grid;gap:12px}.answer-option{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid #dce2eb;border-radius:12px;padding:17px 18px;color:#364357;font-size:15px;line-height:1.7;cursor:pointer}.answer-option:hover{border-color:#b6aef9;background:#faf9ff}.answer-option:has(input:checked){border-color:var(--violet);background:#f6f3ff;box-shadow:0 0 0 1px var(--violet)}.answer-option input{accent-color:var(--violet);width:18px;height:18px;margin:4px 0 0;flex-shrink:0}.question-footer{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:31px}.question-footer>span{font-size:12px;color:#7b859b}.result-hero{text-align:center;max-width:860px;background:#faf9ff}.result-hero.pass{background:#f2fbf7}.result-symbol{font-size:55px;color:var(--violet)}.result-hero.pass .result-symbol{color:#20a58d}.result-hero h2{font-size:35px;margin:10px 0}.result-hero #result-score{font-size:24px;font-weight:850;color:var(--violet-dark);margin:10px 0}.result-hero #result-message{font-size:14px;color:var(--muted);line-height:1.8;margin:0 0 24px}.justify-center{justify-content:center}.certificate-area{margin:55px auto;max-width:860px}.certificate-area>.section-heading{margin-bottom:8px}.certificate-area>p{font-size:14px;line-height:1.8;color:var(--muted)}.name-input{margin-top:20px}.name-input label{font-weight:800;font-size:13px;display:block;margin-bottom:9px}.name-row{display:flex;gap:12px}.name-row input{flex:1;min-width:0;border:1px solid #cdd4e3;padding:14px 17px;border-radius:12px;background:white;color:var(--ink)}.certificate-preview{margin-top:26px;display:grid;gap:14px;justify-items:center}.certificate-preview img{width:100%;display:block;border:1px solid var(--line);border-radius:13px;box-shadow:var(--shadow)}.review-list{display:grid;gap:12px;max-width:860px;margin-inline:auto}.review-item{background:#fff;border:1px solid var(--line);padding:20px 23px;border-radius:13px}.review-head{display:flex;justify-content:space-between;gap:12px;align-items:center}.review-head strong{font-size:13px}.review-status{font-size:12px;font-weight:850;color:#b45365}.review-status.correct{color:#219b79}.review-item h3{font-size:16px;line-height:1.7;margin:10px 0}.review-item p{font-size:13px;line-height:1.85;color:#5c687c;margin:6px 0}.review-item .review-answer{color:#255c78;font-weight:750}.prose-panel{max-width:880px;padding:36px 44px}.prose-panel h2{font-size:21px;margin:25px 0 12px}.prose-panel h2:first-child{margin-top:0}.prose-panel p,.reference-list li{font-size:14px;color:#59667b;line-height:2}.reference-list{padding-left:22px}.reference-list a{overflow-wrap:anywhere}.site-footer{border-top:1px solid var(--line);background:#fff;padding:28px 0}.footer-inner{display:flex;justify-content:space-between;gap:20px;align-items:center}.footer-inner>div{display:grid;gap:6px}.footer-inner strong{font-size:15px}.footer-inner small,.footer-inner span{font-size:12px;color:var(--muted)}.footer-inner button{background:none;border:0;color:var(--violet-dark);font-size:12px;padding:4px 0;text-align:right}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:840px){.hero{grid-template-columns:1fr;padding:39px 36px}.hero-art{display:none}.topic-mini-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.steps{gap:12px}.step{padding:24px 18px}.bottom-cta{padding:27px}.lesson-card{padding:26px}}
@media(max-width:600px){.container{width:min(100% - 28px,1100px)}.site-header{height:auto;min-height:67px}.header-inner{padding:12px 0;flex-wrap:wrap;justify-content:center;gap:8px}.brand{font-size:17px}.brand-mark{width:32px;height:32px}.main-nav{width:100%;justify-content:center;gap:2px}.main-nav button{padding:8px 10px;font-size:12px}.page{padding:15px 0 45px}.hero{padding:28px 22px;min-height:0;border-radius:18px}.hero h1{font-size:32px}.hero p{font-size:14px}.small-meta{gap:12px}.button{min-height:48px;padding:13px 16px}.notice{margin:15px 0 42px;padding:15px}.section-heading{margin:38px 0 17px}.section-heading h2{font-size:23px}.steps{grid-template-columns:1fr}.step{padding:23px}.step h3{margin-top:10px}.topic-mini-grid{gap:9px}.topic-mini{padding:14px 10px;font-size:12px;min-height:70px}.bottom-cta{margin-top:37px;display:grid;text-align:center;padding:25px 18px}.bottom-cta h2{font-size:19px}.page-intro{padding:22px 0}.lesson-top{align-items:flex-start;flex-direction:column}.lesson-cols{grid-template-columns:1fr}.lesson-card{padding:21px 18px}.lesson-card h2{font-size:18px}.lesson-col{padding:17px}.exam-card,.result-hero,.prose-panel{padding:28px 19px;border-radius:16px}.exam-facts{gap:20px}.exam-facts strong{font-size:27px}.question-text{font-size:19px}.answer-option{padding:13px}.question-footer{flex-direction:column;align-items:stretch}.question-footer button{width:100%}.name-row{flex-direction:column}.result-hero h2{font-size:28px}.footer-inner{flex-direction:column;align-items:flex-start}.footer-inner button{text-align:left}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}

/* ページ切替時に本文へプログラムでフォーカスした場合の不要な枠を抑制する。操作対象の :focus-visible は維持。 */
main:focus{outline:none}

/* v0.2: 基礎/実践モードと実践編の選択肢別レビュー */
.mode-picker{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;min-width:0;border:0;padding:0;margin:25px 0 0;text-align:left}
.mode-picker legend{font-size:13px;font-weight:800;color:#37435c;margin-bottom:13px}
.mode-card{display:flex;gap:11px;align-items:center;border:1px solid #dce2eb;background:#fff;border-radius:13px;padding:16px 15px;cursor:pointer}
.mode-card:has(input:checked){border-color:var(--violet);background:#f6f3ff;box-shadow:0 0 0 1px var(--violet)}
.mode-card input{width:19px;height:19px;flex-shrink:0;accent-color:var(--violet)}
.mode-card span{display:grid;gap:3px}.mode-card strong{font-size:16px}.mode-card small{font-size:12px;line-height:1.5;color:var(--muted)}
.exam-start .mode-description{font-size:13px;color:#56637b;line-height:1.7;margin:14px auto 16px;max-width:660px;text-align:left}
.mode-label{background:#f1edff;color:#5341b7}.result-mode-note{margin:0 auto 25px!important;max-width:660px;background:#fff;padding:12px 16px;border-radius:12px;color:#495b72!important;text-align:left}
.choice-feedback{margin:17px 0 12px;display:grid;gap:10px}.choice-feedback h4{font-size:14px;margin:0 0 2px;color:#334055}
.choice-feedback-item{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:#fbfcff}
.choice-feedback-item.recommended{border-color:#a7dbcb;background:#f3fcf7}
.choice-feedback-heading{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px}
.choice-feedback-heading strong{font-size:13px;line-height:1.6;flex:1;min-width:170px}
.choice-feedback-item p{font-size:12px;margin:6px 0 0;line-height:1.8}
.choice-tag{font-size:11px;color:#6356ae;border:1px solid #dcd8fc;padding:1px 7px;border-radius:20px;white-space:nowrap}
.choice-tag.chosen{color:#137d64;border-color:#a7dbcb;background:#fff}
.review-item .review-principle{font-weight:700;color:#3b4b65;margin-top:16px}
.review-item .review-caveat{background:#f8f7ff;border-left:3px solid #8572db;padding:9px 12px;border-radius:5px}
@media(max-width:600px){.mode-picker{grid-template-columns:1fr}.mode-card{padding:13px}.choice-feedback-item{padding:11px}.choice-feedback-heading{display:block}.choice-tag{display:inline-block;margin:4px 5px 0 0}}

/* v0.3: 感情と行動を分けて学ぶための視点 */
.lesson-perspective{margin-top:16px;border-left:4px solid #9f8ce8;background:#f7f5ff;color:#4b4f79;padding:15px 18px;border-radius:8px;font-size:13px;line-height:1.85;font-weight:650}

/* 実践編：推奨回答以外にも同じく正解となる選択肢 */
.choice-feedback-item.accepted {
  border-color: #9bd7bc;
  background: #f0faf4;
}
.choice-tag.accepted-tag {
  background: #dcf3e6;
  color: #216647;
}

/* v0.6.0 選択肢ごとの累計回答件数・割合 */
.stats-summary{max-width:860px;margin:0 auto 17px;border:1px solid #ddd9f5;background:#faf9ff;padding:15px 20px;border-radius:13px}
.stats-summary>p{color:#4b5371;font-size:13px;line-height:1.8;margin:0 0 7px}
.stats-summary .fineprint{margin:8px 0 0}
.stats-summary button{min-height:40px;font-size:13px;margin-top:5px}
.review-stats{background:#f7f8fc;border:1px solid #e5e8f0;border-radius:10px;margin-top:16px;padding:15px}
.review-stats h4{font-size:14px;color:#39465a;margin:0 0 11px}
.review-stats .stats-awaiting{color:#758096;font-size:12px}
.stats-row{margin:13px 0 15px}
.stats-row:last-child{margin-bottom:0}
.stats-row-heading{display:flex;justify-content:space-between;gap:12px;align-items:baseline;margin-bottom:7px}
.stats-label{font-size:12px;color:#485570;line-height:1.5;min-width:0}
.stats-count{font-size:12px;color:#45427d;white-space:nowrap;font-variant-numeric:tabular-nums;font-weight:750}
.stats-track{height:9px;background:#e5e7f4;border-radius:999px;overflow:hidden}
.stats-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,#8673e2,#69acb6);width:0}
@media(max-width:600px){.stats-summary{padding:13px}.review-stats{padding:12px}.stats-row-heading{align-items:flex-start;flex-direction:column;gap:2px}}

/* 0.7.1: 視覚教材の導入 → アニメーション → 要点の順を明示 */
.lesson-introduction{margin:21px 0 22px;padding:20px 22px;border-radius:13px;background:#f8f7ff;border:1px solid #e7e3fb}
.lesson-introduction h3,.lesson-takeaways h3{font-size:16px;line-height:1.55;font-weight:850;margin:0 0 12px;color:#333d5a}
.lesson-introduction .lesson-lead{font-size:14px;line-height:1.85;color:#485573;margin:0 0 10px;font-weight:700}
.lesson-intro-paragraph{font-size:14px;color:#52617c;line-height:1.9;margin:9px 0 0}
.lesson-takeaways{margin:23px 0 19px;padding:22px 24px;border:1px solid #dcece8;border-radius:13px;background:#f5fbf9}
.lesson-takeaways h3{color:#2d6f60}
.lesson-takeaways ul{padding-left:1.35em;margin:0}
.lesson-takeaways li{font-size:14px;line-height:1.85;color:#405c57;margin:8px 0}
.lesson-takeaways li:last-child{margin-bottom:0}
@media(max-width:600px){.lesson-introduction,.lesson-takeaways{padding:17px 16px}.lesson-introduction h3,.lesson-takeaways h3{font-size:15px}.lesson-intro-paragraph,.lesson-takeaways li{font-size:13px}}

/* 0.7.2：一般的なコメントマナーと、初見の匂わせ事例を視覚的に分節。 */
.lesson-basics{padding:20px 0 26px;border-bottom:1px solid #dfe4ed;margin-bottom:28px}
.lesson-section-title{font-size:18px;line-height:1.55;color:#2a3754;font-weight:850;margin:0 0 12px}
.lesson-basics>.lesson-lead{margin:8px 0 19px}
.lesson-case{padding-top:2px}
.lesson-case>.lesson-section-title{margin:0 0 16px;padding-left:14px;border-left:4px solid var(--violet)}
.lesson-case .lesson-introduction{margin-top:0}
.lesson-introduction h4,.lesson-takeaways h4{font-size:16px;line-height:1.55;font-weight:850;margin:0 0 12px;color:#333d5a}
.lesson-takeaways h4{color:#2d6f60}
@media(max-width:600px){.lesson-basics{padding-top:15px;margin-bottom:22px;padding-bottom:22px}.lesson-section-title{font-size:16px}.lesson-introduction h4,.lesson-takeaways h4{font-size:15px}}