/* 3Dモデラー学習ロードマップ — スタイル */
:root{
  --bg:#eef1f5;          /* ビューポートのライトグレー */
  --grid:#d9dee6;
  --panel:#ffffff;
  --ink:#1d2430;
  --ink-2:#4a5565;
  --ink-3:#6b7686;
  --line:#cfd6e0;
  --c:#3b6fd1;           /* 役割色（ページごとに上書き） */
  --rakuten:#bf0000;
  --amazon:#e47911;
  --udemy:#a435f0;
  --radius:10px;
  --maxw:1080px;
  --font:"Zen Kaku Gothic New","Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;touch-action:manipulation}
body{
  margin:0;font-family:var(--font);color:var(--ink);line-height:1.75;font-size:16px;
  background:var(--bg);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:24px 24px;
  touch-action:manipulation;
}
a{color:inherit}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.3;margin:0;font-weight:700;letter-spacing:.01em}
p{margin:0}
.skip{position:absolute;left:-999px;top:0;background:#fff;padding:8px}
.skip:focus{left:8px;z-index:10}
:focus-visible{outline:3px solid var(--c);outline-offset:2px}

/* header */
.top{max-width:var(--maxw);margin:0 auto;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:900;font-size:17px}
.brand-mark{width:28px;height:28px;color:var(--ink)}
.nav{display:flex;gap:18px;font-size:14px;white-space:nowrap}
.nav a{text-decoration:none;color:var(--ink-2);border-bottom:1px solid transparent}
.nav a:hover{border-color:var(--ink-2)}
.pr-note{max-width:var(--maxw);margin:0 auto;padding:0 16px 8px;font-size:12px;color:var(--ink-3)}

main{max-width:var(--maxw);margin:0 auto;padding:8px 16px 48px}

/* hero */
.hero{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;padding:16px 0 40px}
.hero h1{font-size:clamp(30px,5vw,44px);font-weight:900;line-height:1.2;letter-spacing:-.01em}
.lead{margin:18px 0 24px;font-size:17px;color:var(--ink-2);max-width:34em}
.hero-map{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.rolemap{width:100%;height:auto;display:block}
.rolemap .node rect{transition:transform .15s}
.rolemap a:hover .node rect:first-child{filter:brightness(.97)}
@media(min-width:860px){.hero{grid-template-columns:1.05fr 1fr;gap:40px}}

/* buttons */
.btn{display:inline-block;padding:10px 18px;border-radius:8px;text-decoration:none;font-weight:700;font-size:14px;line-height:1.3;border:2px solid transparent}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:#000}
.btn-rakuten{border-color:var(--rakuten);color:var(--rakuten);background:#fff}
.btn-amazon{border-color:var(--amazon);color:#8a4a0b;background:#fff}
.btn-udemy{border-color:var(--udemy);color:#6d1fb0;background:#fff}
.btn-free{border-color:var(--ink-3);color:var(--ink-2);background:#fff}
.btn-rakuten:hover{background:#fff4f4}.btn-amazon:hover{background:#fff6ec}.btn-udemy:hover{background:#f7efff}.btn-free:hover{background:#f3f5f8}

/* roles list (top) */
.roles h2,.howto h2{font-size:24px;margin-bottom:6px}
.sub{color:var(--ink-2);margin-bottom:18px;max-width:40em}
.role-list{display:grid;gap:12px}
.role-row{display:grid;grid-template-columns:8px 1fr auto;align-items:center;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px 14px 0;text-decoration:none;overflow:hidden}
.role-row:hover{border-color:var(--c)}
.role-bar{align-self:stretch;background:var(--c);border-radius:0 3px 3px 0;margin:-14px 0}
.role-main{display:flex;flex-direction:column;gap:4px;min-width:0}
.role-name{font-weight:900;font-size:19px}
.role-tag{color:var(--ink-2);font-size:14px}
.role-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px}
.role-count{font-size:13px;color:var(--ink-3);text-align:right;white-space:nowrap;line-height:1.5}
.tag{display:inline-block;font-size:12px;padding:2px 8px;border-radius:999px;background:#f1f4f8;color:var(--ink-2);border:1px solid var(--line)}
.tag-p{background:#fff;border-style:dashed}

.howto{margin-top:44px}
.howto-list{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 18px 40px;margin:0;max-width:44em}
.howto-list li{margin:6px 0}

/* level chip */
.lv{display:inline-block;font-size:12px;font-weight:700;padding:2px 9px;border-radius:4px;line-height:1.5;vertical-align:middle}
.lv-beginner{background:#e3f3e9;color:#1e6b43}
.lv-intermediate{background:#e4ecfb;color:#24479a}
.lv-advanced{background:#f6e4ea;color:#8a2240}

/* role page */
.role-head{padding:8px 0 24px;border-bottom:4px solid var(--c);margin-bottom:28px}
.crumb{font-size:13px;color:var(--ink-3);margin-bottom:10px}
.crumb a{color:var(--ink-3)}
.role-head h1{font-size:clamp(28px,5vw,42px);font-weight:900}
.tagline{color:var(--c);font-weight:700;margin:6px 0 14px}
.desc{max-width:40em;color:var(--ink-2)}
.tagrow{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.role section{margin-bottom:40px}
.role h2{font-size:22px;margin-bottom:12px;padding-left:12px;border-left:5px solid var(--c)}
.skill-list{margin:0;padding:0;list-style:none;display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.skill-list li{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-size:15px}

/* steps: 縦の工程表 */
.step-list{list-style:none;margin:0;padding:0;counter-reset:step;position:relative}
.step-list::before{content:"";position:absolute;left:19px;top:8px;bottom:8px;width:2px;background:var(--line)}
.step-list li{position:relative;padding:0 0 22px 56px;counter-increment:step}
.step-list li::before{content:counter(step);position:absolute;left:4px;top:0;width:32px;height:32px;border-radius:50%;background:var(--c);color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center;font-size:15px}
.step-list h3{font-size:17px}
.step-list p{color:var(--ink-2);font-size:15px;max-width:40em}

/* materials */
.group-title{font-size:17px;margin:22px 0 10px;color:var(--ink-2)}
.mat-list{display:grid;gap:12px}
.mat{display:grid;grid-template-columns:96px 1fr;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px}
.mat-cover{width:96px}
.cover-img{width:96px;height:auto;border:1px solid var(--line);border-radius:3px}
.cover-ph{width:96px;height:132px;border-radius:3px;background:linear-gradient(135deg,#f6f8fb,#e6ebf2);border:1px solid var(--line);position:relative;display:flex;align-items:flex-end;justify-content:center;padding-bottom:10px}
.cover-ph::before{content:"";position:absolute;left:0;top:0;bottom:0;width:7px;background:var(--c);border-radius:3px 0 0 3px}
.cover-ph span{font-size:11px;font-weight:700;color:var(--ink-3);letter-spacing:.05em}
.mat-head{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:6px}
.soft{font-size:12px;color:var(--ink-3)}
.mat-title{font-size:16px;line-height:1.45}
.mat-by{font-size:13px;color:var(--ink-3);margin:4px 0 8px}
.mat-by .meta{margin-left:6px}
.mat-comment{font-size:14px;color:var(--ink-2)}
.mat-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.mat-actions .btn{padding:8px 14px;font-size:13px}
@media(min-width:720px){.mat{grid-template-columns:120px 1fr;padding:18px}.mat-cover,.cover-img,.cover-ph{width:120px}.cover-ph{height:166px}}

/* related */
.rel-list{display:grid;gap:10px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.rel{display:flex;flex-direction:column;gap:2px;text-decoration:none;background:var(--panel);border:1px solid var(--line);border-left:6px solid var(--c);border-radius:8px;padding:12px 14px;font-weight:700}
.rel small{font-weight:400;color:var(--ink-3);font-size:13px}
.rel:hover{border-color:var(--c)}

/* about */
.about{max-width:44em}
.about h1{font-size:30px;margin-bottom:18px}
.about h2{font-size:20px;margin:28px 0 8px}
.about ul{padding-left:1.3em;color:var(--ink-2)}
.about p{color:var(--ink-2);margin-bottom:8px}
.back{margin-top:28px}

/* footer */
.foot{max-width:var(--maxw);margin:0 auto;padding:20px 16px 40px;border-top:1px solid var(--line);font-size:12px;color:var(--ink-3);line-height:1.8}
.credit{font-weight:700;color:var(--ink-2)}

@media(prefers-reduced-motion:reduce){*{transition:none!important}}
@media(max-width:480px){
  .nav{font-size:13px;gap:12px;width:100%;justify-content:flex-end}
  .role-row{grid-template-columns:8px 1fr}
  .role-count{display:none}
  .mat{grid-template-columns:80px 1fr;gap:12px}
  .mat-cover,.cover-img,.cover-ph{width:80px}.cover-ph{height:110px}
}