:root{font-family:Inter,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,system-ui,sans-serif;color:#213343;background:#f5f7f8;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;min-width:320px}button,select,input,textarea{font:inherit}a{color:inherit;text-decoration:none}button{cursor:pointer}button:focus-visible,select:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,.graph-scroll:focus-visible{outline:3px solid #168b83;outline-offset:3px}
.header{background:#142637;color:#edf8f8}.header-top{max-width:1360px;margin:auto;padding:20px 30px;display:flex;justify-content:space-between;align-items:center;gap:16px}.brand{display:flex;align-items:center;gap:11px;font-weight:900;letter-spacing:-.03em;font-size:20px}.brand-symbol{display:grid;place-items:center;background:#63d9c1;color:#0d3035;width:43px;height:43px;border-radius:11px;font-size:18px}.brand small{display:block;font-weight:500;letter-spacing:.06em;color:#a9c6ca;font-size:10px;margin-top:4px}.local-note{font-size:12px;color:#a1dfd3;border:1px solid #47616a;border-radius:50px;padding:9px 14px}.nav{max-width:1360px;margin:auto;padding:0 30px;display:flex;gap:10px;overflow:auto}.nav a{white-space:nowrap;padding:15px 20px;border-bottom:3px solid transparent;color:#afc5cc;font-size:13px;font-weight:800}.nav a.active{border-bottom-color:#7ee9d3;color:#9ef8e4}.nav a:hover{color:white}
.site{max-width:1360px;margin:0 auto 65px;padding:25px 30px}.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin:0 0 20px;font-size:12px;color:#687e88}.breadcrumb a:hover{color:#008f87;text-decoration:underline}.breadcrumb .sep{color:#aab8bf}
.hero{background:linear-gradient(115deg,#132c40 0%,#1b4851 100%);padding:37px 42px;color:white;border-radius:19px;position:relative;overflow:hidden}.hero:before{content:"";border:1px solid #8aeee044;width:280px;height:280px;position:absolute;border-radius:50%;right:-100px;top:-160px;box-shadow:0 0 0 65px #7febdb0d,0 0 0 130px #7febdb09;pointer-events:none}.hero .eyebrow{color:#7ce4cc}.eyebrow,.feature-kicker{font-size:12px;letter-spacing:.15em;font-weight:900;color:#168377}.hero h1{margin:10px 0 12px;font-size:clamp(29px,3.8vw,45px);letter-spacing:-.04em;line-height:1.35}.hero p{color:#c0d9da;margin:0;line-height:1.8;max-width:750px;font-size:14px}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0 34px}.feature-feature{padding:25px;background:#fff;border:1px solid #e0e9e9;border-radius:15px;display:flex;flex-direction:column;min-height:245px;box-shadow:0 5px 18px #0e364c08}.feature-feature:hover,.domain-card:hover,.item-card:hover,.lesson-card:hover{border-color:#66b9aa;box-shadow:0 8px 26px #174f5414}.feature-feature strong{font-size:22px;line-height:1.45;margin:14px 0}.feature-feature>span:nth-of-type(2){font-size:13px;line-height:1.8;color:#728692}.feature-arrow{margin-top:auto;color:#0e8c80;font-weight:900;font-size:13px;padding-top:16px}
.section{margin-top:32px}.section-title{margin-bottom:15px}.section-title h2{margin:0;font-size:22px;letter-spacing:-.03em}.section-title p{margin:6px 0 0;font-size:12px;color:#718692;line-height:1.7}.domain-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.domain-card{background:#fff;border:1px solid #e0e9e9;border-radius:13px;padding:17px;display:flex;align-items:center;gap:12px}.domain-letter{display:grid;place-items:center;min-width:40px;height:40px;background:#e1f4ee;color:#0b766c;border-radius:9px;font-weight:900}.domain-card strong{display:block;font-size:15px}.domain-card small{display:block;margin-top:4px;color:#7b8d96;font-size:11px;line-height:1.6}.chevron{margin-left:auto;color:#93a8af;font-size:22px}
.notice-box{background:#eaf5f2;color:#436c6d;border-left:3px solid #269c89;padding:14px 17px;border-radius:8px;margin:16px 0;font-size:12px;line-height:1.8}.notice-box strong{color:#185850}.meta-row{display:flex;gap:8px;margin-top:16px}.meta-tag{font-size:12px;background:#e4f4ee;color:#176c62;border-radius:20px;padding:7px 12px;font-weight:800}
.items{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.item-card{background:#fff;border:1px solid #e0e9e9;border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:9px}.item-head{display:flex;justify-content:space-between;align-items:center}.code{color:#0c9082;font-size:11px;font-weight:900;letter-spacing:.1em}.status{font-size:11px;color:#779098;border-radius:20px;background:#edf4f5;padding:5px 9px}.item-card>strong{font-size:19px}.item-card>small{color:#6f828f;font-size:11px;line-height:1.8}.muted{font-size:12px;color:#7b8c96;line-height:1.8}.back-link{display:inline-block;margin-top:25px;color:#0c8f80;font-weight:800;font-size:13px}
.two-col{display:grid;grid-template-columns:minmax(0,1fr) 305px;gap:22px;align-items:start}.rating-list{background:#fff;border:1px solid #e1e9e9;border-radius:15px;overflow:hidden}.rating-item{padding:18px 20px;border-bottom:1px solid #e9eeee}.rating-item:last-child{border-bottom:0}.rating-item>div:first-child{display:flex;gap:12px;align-items:center;margin-bottom:13px}.rating-item strong{font-size:15px}.rating-item label{font-size:12px;display:flex;justify-content:space-between;gap:8px;align-items:center;color:#6e828d}.rating-item select{min-width:225px;max-width:100%;border:1px solid #c8dcda;background:#f9fcfb;padding:10px;border-radius:9px;font-size:12px;color:#145b59}.memo{margin-top:12px}.memo summary{cursor:pointer;color:#447781;font-size:12px}.memo textarea{display:block;width:100%;border:1px solid #d1e0e2;border-radius:8px;padding:10px;margin-top:8px;resize:vertical}.detail-aside,.reader-side{background:#fff;border:1px solid #e0e9e9;border-radius:15px;padding:22px}.detail-aside>h2,.reader-side h2{font-size:15px;margin:5px 0 12px}.detail-aside>h2:not(:first-child){margin-top:28px}.prereqs{display:flex;flex-direction:column;gap:8px}.prereq-link{border:1px solid #d7e9e6;background:#f5fbf9;color:#1d6b65;border-radius:9px;padding:11px;font-size:12px;font-weight:700}.prereq-link:hover{background:#e8f5f0}.level-def{display:grid;grid-template-columns:35px 1fr;gap:10px;font-size:11px;line-height:1.5}.level-def dt{color:#078578;font-weight:900}.level-def dd{margin:0;color:#667c87}.btn{display:inline-flex;justify-content:center;align-items:center;text-align:center;border-radius:10px;border:1px solid #cadcdd;padding:11px 14px;background:#fff;color:#254954;font-size:12px;font-weight:900}.btn:hover{background:#edf7f3}.btn.primary{background:#087d72;border-color:#087d72;color:#fff}.btn.primary:hover{background:#08645d}.btn.danger{color:#a44e43}.toast{position:fixed;bottom:18px;right:18px;z-index:50;padding:14px 18px;box-shadow:0 8px 23px #10344428;background:#183849;color:white;border-radius:12px;max-width:360px;font-size:12px}
.lesson-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.lesson-card{border:1px solid #e0e9e9;border-radius:13px;padding:19px;background:#fff}.lesson-card h3{font-size:17px;margin:8px 0}.lesson-card p{color:#748591;font-size:12px;line-height:1.75}.text-link{color:#078c80;font-size:12px;font-weight:900}.reader-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:22px}.article{background:#fff;border:1px solid #dfe9e9;border-radius:16px;padding:30px 36px;line-height:1.95}.article h1{font-size:30px;line-height:1.4;letter-spacing:-.03em}.article h2{font-size:20px;margin-top:28px}.article h3{font-size:16px}.article p,.article li{font-size:14px;color:#49606b}.reader-side{align-self:start}.reader-side p{font-size:12px;line-height:1.75;color:#78909a}
.graph-controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:22px 0 12px}.graph-scroll{overflow:auto;border:1px solid #dce9e8;background:#eff5f4;border-radius:16px;box-shadow:0 5px 25px #1c41410b}.graph{position:relative;min-width:1180px;min-height:860px;padding:24px}.tree-edges{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:1}.tree-edges > path{fill:none;stroke:#8ca6b5;stroke-width:2;stroke-dasharray:5 5;opacity:.26;transition:opacity .15s,stroke .15s}.tree-edges > path.highlight{opacity:.95;stroke:#118c80;stroke-width:2.8;stroke-dasharray:none}.tree-edges > path.dim{opacity:.07}.tree-stages{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:27px;position:relative;z-index:2}.tree-stage{min-width:0}.stage-title{position:relative;z-index:2;font-size:13px;color:#30646b;font-weight:900;text-align:center;padding:8px 0 16px}.stage-title small{display:block;color:#76929a;font-size:10px;margin-top:5px}.tree-stage-nodes{display:flex;flex-direction:column;gap:8px}.tree-node{display:flex;flex-direction:column;gap:3px;padding:10px 11px;background:#fff;min-height:68px;border:1px solid #dce8e8;box-shadow:0 3px 12px #0d42400a;border-radius:9px;transition:border-color .15s,background .15s,opacity .15s}.tree-node span{font-size:10px;color:#078f81;font-weight:900}.tree-node strong{font-size:12px;line-height:1.35}.tree-node small{font-size:10px;color:#7b909a}.tree-node:hover,.tree-node.selected{border-color:#12a18e;background:#e3f6ef}.tree-node.dim{opacity:.48}.tree-node.selected{outline:2px solid #129c8f;outline-offset:1px}.graph-help{color:#637f83;font-size:11px;text-align:center;padding:15px}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:19px}.metric{border:1px solid #e0e9e9;background:#fff;border-radius:13px;padding:19px}.metric-value{font-size:26px;font-weight:900}.metric-label{margin-top:4px;color:#708894;font-size:12px}.score-list{border:1px solid #e0e9e9;border-radius:14px;padding:8px 20px;background:#fff}.score-row{display:grid;grid-template-columns:115px 1fr 45px;gap:10px;align-items:center;padding:14px 0;border-bottom:1px solid #eef1f2;font-size:12px}.score-row:last-child{border-bottom:0}.score-row .meter{height:9px;background:#e4eded;border-radius:10px;overflow:hidden}.score-row .meter span{display:block;height:100%;border-radius:10px;background:#2caa96}.score-row strong{font-size:12px;text-align:right}.detail-aside label{display:block;font-size:12px;margin-bottom:8px;font-weight:800}.detail-aside input{width:100%;border:1px solid #c7ddda;border-radius:9px;padding:11px}.stack-buttons{display:flex;flex-direction:column;gap:9px}.loading{color:#748f95;text-align:center;padding:36px 12px}.footer{border-top:1px solid #e1e8ea;text-align:center;padding:24px;color:#7e8e98;font-size:11px;line-height:1.8}
@media(max-width:880px){.site{padding:21px 18px}.header-top,.nav{padding-left:18px;padding-right:18px}.feature-grid{grid-template-columns:1fr}.feature-feature{min-height:180px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.two-col{grid-template-columns:minmax(0,1fr)}.reader-layout{grid-template-columns:1fr}.graph{min-height:860px}}
@media(max-width:560px){.site{padding:14px 12px}.header-top{padding:15px 12px}.nav{padding:0 5px}.nav a{padding:13px 14px}.local-note{display:none}.hero{padding:25px 22px}.hero h1{font-size:27px}.domain-grid,.items,.lesson-grid{grid-template-columns:1fr}.article{padding:22px}.metrics{gap:6px}.metric{padding:13px 10px}.metric-value{font-size:19px}.score-row{grid-template-columns:94px 1fr 37px}.rating-item label{flex-wrap:wrap}.rating-item select{width:100%;min-width:0}}