/* Persistent contents navigation and readable chapter layout. */
:root{--roadmap-header-height:76px;--roadmap-tabs-height:64px;--roadmap-directory-height:64px}
.roadmap-tabs{top:var(--roadmap-header-height);z-index:18}
.roadmap-layout{grid-template-columns:270px minmax(0,1fr);gap:32px;align-items:start}
.roadmap-side{position:sticky;top:calc(var(--roadmap-header-height) + var(--roadmap-tabs-height) + 16px);align-self:start;min-width:0;z-index:15}
.roadmap-directory{border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:0 8px 28px #10243e08;overflow:hidden}
.roadmap-directory summary{cursor:pointer;display:flex;flex-direction:column;gap:4px;padding:18px 20px;background:#f0f5fc;color:var(--ink);font-size:14px;font-weight:800;list-style:none}
.roadmap-directory summary::-webkit-details-marker{display:none}
.roadmap-directory summary:after{content:'目次を開く ＋';font-size:11px;color:var(--blue)}
.roadmap-directory[open] summary:after{content:'目次を閉じる −'}
.roadmap-directory summary small{font-size:11px;font-weight:500;color:var(--muted)}
.roadmap-directory-body{max-height:calc(100dvh - var(--roadmap-header-height) - var(--roadmap-tabs-height) - 140px);overflow-y:auto;overscroll-behavior:contain;padding:12px}
.roadmap-nav-help{font-size:11px;color:var(--muted);margin:0 8px 10px}
.roadmap-side ol,.roadmap-side ul{list-style:none;padding:0;margin:0;display:block}
.roadmap-side li,.roadmap-side li:first-child{border:0;padding:0;font-size:13px}
.roadmap-side a{display:flex;gap:9px;padding:10px;border-radius:7px;text-decoration:none;color:#52657b;line-height:1.5}
.roadmap-side a:hover{background:#f2f6fc;color:var(--blue)}
.roadmap-side a.is-current{background:#eaf2ff;color:#174ea6;font-weight:800;box-shadow:inset 3px 0 #1e63e9}
.roadmap-nav-number{color:var(--blue);font-size:11px;padding-top:2px}
.roadmap-side .roadmap-case-nav{margin:3px 0 10px 24px;border-left:1px solid var(--line);padding-left:6px}
.roadmap-case-nav a{font-size:11px;padding:7px 9px}
.roadmap-side .roadmap-top-link{border-top:1px solid var(--line);border-radius:0;margin-top:12px;font-size:12px;color:var(--blue)}
.roadmap-content{min-width:0}.roadmap-content>section{padding:30px;margin:0 0 24px;border:1px solid var(--line);border-radius:14px;background:#fff;line-height:1.85}
.roadmap-content h2{font-size:24px;line-height:1.5}.roadmap-content>section>p{font-size:15px;max-width:70ch}
.roadmap-cases{grid-template-columns:1fr}.roadmap-case{padding:24px;background:var(--paper)}.roadmap-case h3{margin:8px 0;font-size:20px}.roadmap-case p{font-size:14px;margin:8px 0}.roadmap-case dl{margin:10px 0}.roadmap-case dl div{font-size:13px}.decision-box{grid-template-columns:1fr}.decision-box article{background:var(--paper)}.decision-box p{font-size:14px}
.roadmap-section-nav{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:20px;margin-top:28px;border-top:1px solid var(--line);font-size:12px}.roadmap-section-nav a{text-decoration:none;color:var(--blue);padding:6px 0}
.roadmap-content>section,.roadmap-case,#roadmap-overview{scroll-margin-top:calc(var(--roadmap-header-height) + var(--roadmap-tabs-height) + 20px)}
.roadmap-directory a:focus-visible,.roadmap-directory summary:focus-visible,.roadmap-section-nav a:focus-visible{outline:3px solid var(--blue);outline-offset:2px}
@media(max-width:900px){.roadmap-hero,.roadmap-layout{grid-template-columns:1fr}.roadmap-layout{gap:20px}.roadmap-side{top:calc(var(--roadmap-header-height) + var(--roadmap-tabs-height));padding:0}.roadmap-directory{border-radius:0 0 12px 12px}.roadmap-directory summary{padding:12px 16px;position:relative;padding-right:90px;min-height:64px}.roadmap-directory summary:after{position:absolute;right:14px;top:22px}.roadmap-directory-body{max-height:min(50dvh,420px)}.roadmap-content>section,.roadmap-case,#roadmap-overview{scroll-margin-top:calc(var(--roadmap-header-height) + var(--roadmap-tabs-height) + var(--roadmap-directory-height) + 16px)}.roadmap-content>section{padding:22px 18px}.roadmap-content h2{font-size:22px}.roadmap-hero h1{font-size:34px}.roadmap-shell{padding:28px 18px 60px}.roadmap-final{padding:22px}.roadmap-case{padding:18px}}
@media print{.roadmap-side,.roadmap-tabs,.roadmap-section-nav{display:none}.roadmap-layout{display:block}.roadmap-content>section{break-inside:avoid}}