:root{color:#243b30;font-synthesis:none;--green:#245b43;--muted:#748075;--line:#dde2d7;background:#f7f8f2;font-family:Hiragino Kaku Gothic ProN,Noto Sans JP,Yu Gothic,Meiryo,sans-serif;font-size:14px;font-weight:400;line-height:1.7}*{box-sizing:border-box}body{margin:0}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline-offset:4px;outline:3px solid #bf8434}button:hover:not(:disabled),.mode-card:hover{filter:brightness(.97)}.skip{z-index:10;background:#fff;padding:12px;position:absolute;top:-80px;left:16px}.skip:focus{top:8px}.header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;max-width:1240px;height:94px;margin:auto;padding:0 40px;display:flex}.brand{letter-spacing:1px;align-items:center;gap:12px;font-size:23px;font-weight:800;display:flex}.brand-icon{background:var(--green);color:#fff;text-align:center;border-radius:10px;width:38px;height:38px;font-size:22px;line-height:38px}.brand-sub{color:var(--muted);letter-spacing:.05em;margin-left:8px;font-size:10px;font-weight:500}nav{gap:32px;font-size:12px;font-weight:600;display:flex}nav a{padding:12px 0}nav a[aria-current]{color:var(--green);border-bottom:2px solid var(--green)}main{outline:none;max-width:1160px;margin:auto}.hero{grid-template-columns:1.08fr 1fr;align-items:center;gap:50px;padding:65px 0 52px;display:grid}.eyebrow{letter-spacing:.13em;color:var(--green);align-items:center;gap:9px;font-size:10px;font-weight:700;display:flex}.eyebrow>span{background:#669773;border-radius:50%;width:7px;height:7px}.hero h1{letter-spacing:.04em;margin:20px 0;font-size:55px;font-weight:800;line-height:1.6}.underline{background:linear-gradient(#0000 80%,#e1e8bf 80% 96%,#0000 96%)}.intro{color:#627064;margin-bottom:27px;font-size:13px;line-height:2.1}.primary{border:1px solid var(--green);background:var(--green);color:#fff;border-radius:7px;justify-content:center;align-items:center;gap:35px;min-height:48px;padding:15px 24px;font-size:13px;font-weight:700;display:inline-flex}.primary span{font-size:20px}.hero-caption{color:var(--muted);letter-spacing:.06em;margin:12px 0 26px;font-size:10px}i{color:#a4aea1;padding:0 8px;font-style:normal}.hero-facts{gap:0;display:flex}.hero-facts>div{border-right:1px solid var(--line);padding:0 24px}.hero-facts>div:first-child{padding-left:0}.hero-facts>div:last-child{border:0}.hero-facts strong{font-family:Arial,sans-serif;font-size:30px;font-weight:500}.hero-facts strong span{margin-left:5px;font-family:inherit;font-size:10px}.hero-facts small{color:var(--muted);margin-top:1px;font-size:10px;display:block}.map-panel{background:#eef2e8;border:1px solid #e2e7db;border-radius:16px;padding:20px 23px 15px;position:relative}.map-heading{letter-spacing:.12em;color:#778675;justify-content:space-between;font-size:9px;display:flex}.map-heading span:first-child{font-weight:700}.japan-map{width:100%;max-height:410px;display:block}.map-note{background:#fafbf6;border:1px solid #e0e6d8;border-radius:8px;align-items:center;gap:17px;padding:11px 16px;display:flex}.note-number,.note-end{color:#7485ad;font-family:Arial,sans-serif;font-size:30px;line-height:1}.note-number span,.note-end span{font-size:10px}.note-end{color:#b58b9b;margin-left:auto}.map-note strong{font-size:11px}.map-note p{color:var(--muted);margin:2px 0;font-size:10px}.section-heading{justify-content:space-between;align-items:end;margin-bottom:26px;display:flex}.section-heading h2{letter-spacing:.04em;margin:6px 0 0;font-size:23px}.muted{color:var(--muted);font-size:12px;font-weight:400}.mode-grid{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.mode-card{text-align:left;border:1px solid var(--line);background:#fffefa;border-radius:11px;padding:25px 25px 17px;transition:transform .15s;display:block;position:relative}.mode-card:hover{transform:translateY(-3px)}.recommended{background:#f2f6ea;border:1.5px solid #537c58}.recommend{color:#fff;letter-spacing:.04em;background:#5d7c51;border-radius:4px;padding:3px 10px;font-size:9px;position:absolute;top:-12px;left:22px}.card-top{justify-content:space-between;align-items:center;display:flex}.mode-icon{color:#486445;background:#e3ecd8;border-radius:10px;place-items:center;width:43px;height:43px;font-size:23px;font-weight:600;display:grid}.ochre{color:#998354;background:#f1e9d8}.blue{color:#678697;background:#e6ecef}.card-index{letter-spacing:.09em;color:#859080;font-size:8px}.mode-card h3{letter-spacing:.03em;margin:19px 0 10px;font-size:18px}.mode-card p{color:#738071;margin:0 0 23px;font-size:11px;line-height:2}.card-bottom{border-top:1px solid var(--line);color:#6c796a;justify-content:space-between;align-items:center;padding-top:15px;font-size:10px;display:flex}.card-bottom b{background:#edf0e5;border-radius:50%;place-items:center;width:28px;height:28px;font-size:18px;line-height:1;display:grid}.learning-strip{background:#edf0e5;border-radius:10px;grid-template-columns:1.05fr 1fr 1fr 1fr;gap:24px;margin-top:35px;padding:26px;display:grid}.strip-title{align-items:center;gap:14px;display:flex}.strip-title>span{color:#7e916c;font-size:38px}.strip-title h3{margin:0;font-size:13px;line-height:1.9}.learning-strip b{color:#8b997b;letter-spacing:.07em;font-size:10px}.learning-strip b span{color:#40553d;letter-spacing:0;margin-left:8px;font-size:11px}.learning-strip p{color:#76826e;margin-bottom:0;font-size:10px;line-height:1.9}.scope-note{color:#77816f;margin:22px 0;font-size:10px;line-height:1.9}.mode-section{padding-top:4px}footer{border-top:1px solid var(--line);color:#7c8678;justify-content:space-between;align-items:center;gap:20px;max-width:1160px;margin:48px auto 0;padding:26px 0 30px;font-size:9px;display:flex}.footer-brand{color:#40573e;font-size:14px;font-weight:700}.footer-brand span{color:#89917f;margin-left:13px;font-size:9px;font-weight:400}footer>div{align-items:center;gap:20px;display:flex}.narrow{max-width:740px;margin:40px auto 60px}.page-top{color:#77816f;justify-content:space-between;margin-bottom:32px;font-size:12px;display:flex}.quiz-progress{justify-content:space-between;align-items:center;display:flex}.quiz-progress strong{font-size:20px}.quiz-progress span{color:#788370;font-size:12px;font-weight:400}progress{background:#e1e7d8;border:0;border-radius:20px;width:100%;height:6px;margin:16px 0 28px;display:block}progress::-webkit-progress-bar{background:#e1e7d8;border-radius:20px}progress::-webkit-progress-value{background:#597a50;border-radius:20px}.question-card{border:1px solid var(--line);text-align:center;background:#fffefa;border-radius:15px;padding:38px}.question-card>.eyebrow{letter-spacing:.03em;justify-content:center;font-size:14px}.question-number{letter-spacing:.08em;margin-top:15px;font-family:Arial,sans-serif;font-size:94px;font-weight:600;line-height:1.4}.choices{grid-template-columns:1fr 1fr;gap:13px;margin-top:30px;display:grid}.choice{text-align:left;background:#fff;border:1px solid #d6ded1;border-radius:8px;align-items:center;gap:13px;min-height:70px;padding:15px;font-size:14px;font-weight:600;display:flex}.choice-key{color:#829078;background:#f1f4ec;border-radius:5px;place-items:center;min-width:26px;height:26px;font-size:11px;display:grid}.choice b{margin-left:auto}.choice.correct{background:#eaf3e8;border:2px solid #3b7452}.choice.incorrect{background:#fbefe9;border:2px solid #b3755f}.feedback{text-align:left;background:#eff5e9;border:1px solid #d7e4ce;border-radius:8px;margin-top:23px;padding:22px}.feedback.wrong{background:#fcf3e8;border-color:#eddcc4}.memory-hint{font-size:13px;line-height:1.9}.memory-hint>span{margin-bottom:5px;font-size:10px;font-weight:700;display:block}.feedback details{margin-top:15px}.feedback summary{cursor:pointer;font-size:12px}.feedback .japan-map{max-height:300px}.next{width:100%;margin-top:20px}.keyboard-hint{color:#8a9381;margin:24px 0 0;font-size:11px}.page-title{margin:45px 0 32px}.page-title h1{letter-spacing:.05em;margin:12px 0;font-size:32px}.page-title p{color:#7b8574}.result-page,.study-page{padding:0 20px 35px}.result-summary{background:#edf2e5;border:1px solid #dce4d2;border-radius:12px;align-items:center;gap:36px;padding:30px;display:flex}.grade{flex-direction:column;align-items:center;min-width:95px;display:flex}.grade small,.result-time small{color:#798570;font-size:11px}.grade b{color:#5f7850;font-family:Georgia,serif;font-size:78px;line-height:1.15}.score strong{font-family:Arial,sans-serif;font-size:52px;font-weight:500}.score strong span{color:#7a866f;font-size:15px}.score p{font-size:12px}.result-time{flex-direction:column;gap:8px;margin-left:auto;display:flex}.result-time b{font-size:25px}.actions{flex-wrap:wrap;gap:12px;margin:26px 0 40px;display:flex}.secondary{background:#fffefa;border:1px solid #cfd8c7;border-radius:7px;justify-content:center;align-items:center;min-height:44px;padding:12px 18px;font-size:12px;display:inline-flex}.result-page h2{margin:35px 0 20px;font-size:20px}.result-page h2 span{margin-left:12px}.review-list{border:1px solid var(--line);border-radius:9px;overflow:hidden}.review-row{border-bottom:1px solid var(--line);background:#fffefa}.review-row:last-child{border-bottom:0}.review-row summary{cursor:pointer;align-items:center;gap:16px;padding:16px 20px;list-style:none;display:flex}.review-row summary::-webkit-details-marker{display:none}.review-row summary>b{min-width:56px;font-family:Arial,sans-serif;font-size:24px}.review-row summary>small{white-space:nowrap;color:#85907b;margin-left:auto}.review-row>div{padding:0 25px 20px;font-size:13px}.good{color:#376c46}.bad{color:#aa6749}.stats{border:1px solid var(--line);background:#fffefa;border-radius:9px;grid-template-columns:repeat(3,1fr);padding:25px;display:grid}.stats>div{text-align:center;border-right:1px solid var(--line)}.stats>div:last-child{border:0}.stats small{color:#7f8976;font-size:11px;display:block}.stats strong{margin-top:8px;font-size:27px;display:block}.stats strong span{margin-left:5px;font-size:12px}.history-chart{border:1px solid var(--line);background:#fffefa;border-radius:9px;margin-top:25px;padding:22px}.history-chart h3{margin:0 0 10px;font-size:13px}.history-chart small{color:#89927d;margin-left:8px;font-size:10px;font-weight:400}.history-chart svg{width:100%;max-height:200px}.table-wrap{margin-top:20px;overflow:auto}table{border-collapse:collapse;text-align:left;width:100%;font-size:12px}th,td{border-bottom:1px solid var(--line);padding:13px 17px}thead{color:#6b7861;background:#edf1e5}.empty{text-align:center;color:#7c8871;border:1px dashed #cbd5c2;border-radius:10px;margin-top:25px;padding:60px 20px}.study-toolbar{flex-wrap:wrap;gap:10px;display:flex}.search{background:#fffefa;border:1px solid #cdd6c5;border-radius:7px;flex:1;align-items:center;gap:10px;min-width:200px;padding:0 14px;display:flex}.search span{color:#7d8c71;font-size:25px}.search input{color:#344a2f;background:0 0;border:0;width:100%;min-width:0;padding:12px 0;font-size:13px}.region-tabs{flex-wrap:wrap;gap:8px;margin:22px 0;display:flex}.region-tabs button{background:0 0;border:1px solid #dce3d4;border-radius:30px;align-items:center;gap:6px;min-height:44px;padding:10px 16px;font-size:11px;display:flex}.region-tabs button[aria-pressed=true]{color:#fff;background:#2d6046;border-color:#2d6046}.region-tabs span{border-radius:50%;width:7px;height:7px}.list-count{color:#849077;margin:15px 0;font-size:11px}.study-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.study-card{border:1px solid var(--line);border-top:3px solid var(--region);background:#fffefa;border-radius:8px;min-height:195px;padding:20px}.study-card-top{justify-content:space-between;align-items:center;display:flex}.study-card-top>b{letter-spacing:.03em;font-family:Arial,sans-serif;font-size:32px}.reveal{color:#758368;background:#f5f7f0;border:1px solid #e0e5d9;border-radius:6px;min-height:44px;padding:10px;font-size:10px}.study-card h3{margin:13px 0 9px;font-size:14px}.study-card p{color:#78856e;margin:0;font-size:11px;line-height:1.9}.hidden-answer{color:#8b957e;padding-top:24px;font-size:14px}.hidden-answer small{margin-top:7px;font-size:10px;display:block}.prefecture-table{margin-top:30px}.prefecture-table summary{cursor:pointer;background:#edf1e5;border-radius:7px;padding:15px;font-weight:600}.about h1{font-size:32px}.about h2{margin-top:30px;font-size:20px}.about p,.about li{color:#62735b;line-height:2}.about a{color:#31614b;text-decoration:underline}@media (width>=1500px){.hero{padding-top:80px;padding-bottom:65px}.hero h1{font-size:60px}.japan-map{max-height:440px}}@media (width<=1240px){main{margin:0 40px}footer{margin-left:40px;margin-right:40px}.hero{gap:35px}.hero h1{font-size:47px}.brand-sub{display:none}.mode-card{padding:24px 19px 17px}.mode-card h3{font-size:16px}.learning-strip{gap:15px;padding:24px 18px}}@media (width<=800px){main{margin:0 24px}.header{height:78px;padding:0 24px}.hero{gap:20px;padding-top:40px}.hero h1{font-size:36px}.hero .eyebrow{font-size:8px}.intro{font-size:11px}.map-panel{padding:15px 10px}.map-heading{font-size:7px}.map-note{gap:8px;padding:10px}.map-note strong{font-size:9px}.map-note p{font-size:8px}.note-number,.note-end{font-size:24px}.hero-facts>div{padding:0 12px}.hero-facts strong{font-size:25px}.hero-facts strong span,.hero-facts small{font-size:8px}.mode-grid{gap:12px}.card-index{font-size:7px}.mode-card{padding:24px 14px 15px}.mode-card h3{font-size:14px}.mode-card p{font-size:10px}.learning-strip{grid-template-columns:1fr 1fr;gap:22px}.study-grid{grid-template-columns:1fr 1fr}footer{flex-direction:column;align-items:flex-start;margin:35px 24px 0}.result-summary{gap:20px}.result-time b{font-size:20px}.score strong{font-size:40px}.score strong span{font-size:12px}}@media (width<=600px){main{margin:0 20px}.header{height:72px;padding:0 20px}.brand{gap:8px;font-size:19px}.brand-icon{border-radius:8px;width:32px;height:32px;font-size:19px;line-height:32px}nav{gap:15px;font-size:10px}.hero{grid-template-columns:1fr;gap:30px;padding:34px 0}.hero .eyebrow{font-size:8px}.hero h1{margin:16px 0;font-size:43px;line-height:1.55}.intro{margin-bottom:22px;font-size:12px;line-height:2.1}.primary{font-size:12px}.hero-caption{margin-bottom:24px}.hero-facts>div{padding:0 25px}.hero-facts strong{font-size:28px}.hero-facts strong span,.hero-facts small{font-size:9px}.map-panel{padding:16px 20px}.japan-map{max-height:330px}.map-heading{font-size:8px}.map-note{gap:16px;padding:12px}.map-note strong{font-size:11px}.map-note p{font-size:9px}.section-heading{margin-bottom:28px;display:block}.section-heading h2{margin-bottom:7px;font-size:23px}.section-heading>.muted{font-size:10px}.mode-grid{grid-template-columns:1fr;gap:19px}.mode-card{padding:24px 24px 17px}.mode-card h3{margin:15px 0 9px;font-size:19px}.mode-card p{margin-bottom:20px;font-size:12px}.card-index{font-size:9px}.card-bottom{font-size:11px}.learning-strip{grid-template-columns:1fr;gap:20px;margin-top:25px;padding:24px}.strip-title{border-bottom:1px solid #dbe2d1;padding-bottom:15px}.strip-title h3 br,.learning-strip p br{display:none}.learning-strip p{margin-top:6px;font-size:11px}.learning-strip b span{font-size:12px}.scope-note{font-size:10px}.footer-brand span{margin:7px 0;display:block}footer>div{flex-wrap:wrap;gap:10px}footer{padding-top:20px}.narrow{margin-top:25px}.page-top{margin-bottom:25px;font-size:10px}.question-card{padding:24px 17px}.question-card>.eyebrow{font-size:12px}.question-number{font-size:80px}.choices{grid-template-columns:1fr;gap:10px;margin-top:23px}.choice{min-height:60px;padding:12px;font-size:13px}.feedback{padding:16px}.keyboard-hint span{display:none}.result-page,.study-page{padding:0 0 25px}.page-title{margin:32px 0 25px}.page-title h1{letter-spacing:0;font-size:26px}.page-title p{font-size:12px}.result-summary{flex-wrap:wrap;gap:15px;padding:20px}.grade{min-width:62px}.grade b{font-size:65px}.score strong{font-size:38px}.score strong span,.score p{font-size:10px}.result-time{border-top:1px solid #dce4d2;flex-flow:wrap;align-items:center;gap:12px;width:100%;margin:0;padding-top:15px}.result-time b{font-size:20px}.result-time small{font-size:10px}.actions{gap:10px}.actions>*{white-space:nowrap;flex:1;padding:12px;font-size:11px}.actions>a{flex-basis:100%}.review-row summary{gap:9px;padding:13px 10px;font-size:11px}.review-row summary>b{min-width:39px;font-size:20px}.review-row summary>small{font-size:9px}.review-row summary>.muted{display:none}.stats{padding:18px 7px}.stats small{font-size:9px}.stats strong{font-size:20px}.stats>div:last-child strong{font-size:16px}.history-chart{padding:15px 10px}.study-toolbar{gap:8px}.search{flex-basis:100%}.study-toolbar>.secondary{flex:1}.region-tabs{gap:6px}.region-tabs button{padding:8px 11px;font-size:10px}.study-grid{grid-template-columns:1fr}.study-card{min-height:170px}.study-card h3{font-size:15px}.study-card p{font-size:12px}.about h1{font-size:28px}.about h2{font-size:18px}.about p,.about li{font-size:12px}th,td{padding:12px 8px;font-size:11px}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media (width<=600px){.hero h1{font-size:clamp(28px,8vw,43px)}}.prefix-map .map-heading{align-items:center;gap:12px}.prefix-map h2{color:#243b30;letter-spacing:0;margin:0;font-size:14px}.hero>.prefix-map{grid-column:1/-1}.prefix-map{min-width:0}.hero>.prefix-map .prefix-svg{width:100%;min-width:864px;max-width:1000px;max-height:none;margin:0 auto}.hero .prefix-visual{min-width:0;overflow-x:auto}.hero .prefix-layout{grid-template-columns:minmax(0,1fr);gap:20px;display:grid}.hero .prefix-info{min-width:0}.hero .prefix-correspondence{grid-template-columns:repeat(3,minmax(0,1fr));gap:0 20px;display:grid}.prefix-legend{flex-wrap:wrap;gap:6px;display:flex}.prefix-legend button{background:#fffefa;border:1px solid #cbd4c3;border-radius:5px;justify-content:center;align-items:center;gap:6px;min-width:48px;min-height:44px;padding:7px;font-size:13px;font-weight:700;display:flex}.prefix-legend button[aria-pressed=true]{outline-offset:1px;outline:2px solid #243b30}.prefix-legend button span{background:var(--prefix);border-radius:2px;width:12px;height:12px}.map-instruction,.map-source{color:#56664e;font-size:11px;line-height:1.8}.map-source{border-top:1px solid #cfd8c7;margin-bottom:0;padding-top:12px}.prefix-correspondence>div{align-items:start;gap:10px;margin:12px 0;font-size:12px;display:flex}.prefix-correspondence b{background:var(--prefix);color:#fff;border-radius:3px;padding:0 7px}.detailed-map{margin-bottom:32px}.countdown{color:#245b43;justify-content:center;align-items:baseline;gap:8px;margin-bottom:24px;font-size:14px;display:flex}.countdown b{font-variant-numeric:tabular-nums;min-width:82px;font:700 36px Arial,sans-serif}.countdown.urgent{color:#b0352d}@media (width<=600px){.header{flex-wrap:wrap;gap:4px 18px;height:auto;min-height:88px;padding-top:10px;padding-bottom:7px}.brand{font-size:20px}nav{margin-left:auto}.detailed-map .prefix-layout{grid-template-columns:1fr;gap:10px}.prefix-map{padding:16px 10px}.prefix-svg{max-height:none}.prefix-legend{gap:7px}.prefix-legend button{flex:1 0 15%}}@media (width<=1000px){.hero .prefix-visual:before{content:"図は左右にスクロールできます";color:#56664e;padding:8px 0;font-size:12px;display:block}.hero .prefix-correspondence{grid-template-columns:1fr}}.detailed-map .prefix-layout{grid-template-columns:1.3fr 1fr;align-items:center;gap:24px;display:grid}.detailed-map .prefix-svg{max-height:none}@media (width<=600px){.detailed-map .prefix-layout{grid-template-columns:1fr;gap:10px;min-width:0}.detailed-map .prefix-visual{border:1px solid #cfd8c7;border-radius:5px;overflow-x:auto}.detailed-map .prefix-visual:before{content:"図は左右にスクロールできます";color:#56664e;padding:8px;font-size:11px;display:block}.detailed-map .prefix-svg{min-width:620px}.detailed-map .prefix-layout>*{min-width:0}}.hokkaido-panel{background:#f0f3e9;border:1px solid #d6dfcd;border-radius:12px;grid-column:1/-1;min-width:0;padding:24px}.hokkaido-heading{flex-wrap:wrap;align-items:baseline;gap:16px;display:flex}.hokkaido-heading h2{margin:0;font-size:22px}.hokkaido-heading>span,.hokkaido-caption,.hokkaido-source{color:#56664e;font-size:12px}.hokkaido-layout{grid-template-columns:minmax(0,1fr);gap:20px;display:grid}.hokkaido-scroll{min-width:0;overflow-x:auto}.hokkaido-svg{width:100%;min-width:790px;max-width:1000px;margin:auto;display:block}.hokkaido-key{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:0;padding:0;list-style:none;display:grid}.hokkaido-key li{border-top:3px solid var(--hokkaido-color);background:#fffefa;border-radius:7px;align-items:start;gap:12px;padding:15px;display:flex}.hokkaido-key b{color:var(--hokkaido-color);font:700 27px Arial,sans-serif}.hokkaido-key strong{font-size:13px}.hokkaido-key p{margin:5px 0 0;font-size:12px}.hokkaido-source{border-top:1px solid #d6dfcd;margin:20px 0 0;padding-top:14px}.hokkaido-source a{text-decoration:underline}@media (width<=800px){.hokkaido-panel{padding:18px 12px}.hokkaido-heading h2{font-size:19px}.hokkaido-key{grid-template-columns:1fr}.hokkaido-scroll:before{content:"図は左右にスクロールできます";color:#56664e;padding:8px 0;font-size:12px;display:block}}.hero>.prefix-map .full-code-svg{min-width:1000px;max-width:1210px}.hero .prefix-visual:before{content:"図は左右にスクロールできます";color:#56664e;padding:8px 0;font-size:12px;display:block}@media (width>=1200px){.hero .prefix-visual:before{display:none}}