:root {
  --bg: #0f1320;
  --panel: #171c2e;
  --panel-2: #1f2740;
  --text: #e7eaf3;
  --muted: #9aa6c4;
  --accent: #4f8cff;
  --accent-2: #7ad0ff;
  --border: #2a3350;
  --max: 960px;
  --max-wide: 1180px; /* 比較表など横長データページ用 */
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 文中（散文）リンクは色だけに頼らず下線で識別可能にする（WCAG 1.4.1 / Lighthouse） */
.lead a,
.cat-desc a,
.article-body a,
.ssl-cta p a,
.ssl-promo a,
.copy a,
.market-banner a,
.cat-block p a,
.note a { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }
/* 横長データページ（SaaS一覧 / IdP比較）の本文だけ広げる。記事本文は可読性のため 960px のまま */
main.wrap-wide { max-width: var(--max-wide); }

/* header */
.site-header {
  background: rgba(15,19,32,.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; padding-top: 12px; padding-bottom: 12px;
}
.brand { color: var(--text); font-weight: 700; font-size: 1.05rem; }
.brand-mark {
  display: inline-block; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06122b; font-weight: 800; padding: 2px 8px; border-radius: 6px; margin-right: 6px;
}
.site-nav a { color: var(--muted); margin-left: 16px; font-size: .95rem; }
.site-nav a:hover { color: var(--text); text-decoration: none; }
.site-nav a.lang-switch { border: 1px solid var(--border); border-radius: 6px; padding: 1px 8px; color: var(--accent-2); }
.market-banner { background: var(--panel-2); border-bottom: 1px solid var(--border); color: var(--muted); font-size: .85rem; text-align: center; padding: 6px 12px; }
.market-banner a { color: var(--accent-2); }

/* hero */
.hero { padding: 56px 0 24px; }
.hero h1 { font-size: 2rem; line-height: 1.4; margin: 0 0 16px; }
.hero .accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { color: var(--muted); font-size: 1.05rem; }

/* category blocks + cards */
.cat-block { margin: 40px 0; }
.cat-title { font-size: 1.4rem; margin: 0 0 4px; border-left: 4px solid var(--accent); padding-left: 12px; }
.cat-title a { color: var(--text); }
.cat-desc { color: var(--muted); margin: 0 0 16px; }

.card-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  transition: transform .12s ease, border-color .12s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card a { display: block; color: inherit; padding: 18px; }
.card a:hover { text-decoration: none; }
.card h2, .card h3 { margin: 0 0 8px; font-size: 1.1rem; color: var(--accent-2); font-weight: 700; }
.card p { margin: 0; color: var(--muted); font-size: .92rem; }

/* article */
.breadcrumb { color: var(--muted); font-size: .85rem; margin: 24px 0 8px; }
.breadcrumb a { color: var(--muted); }
.article-head h1 { font-size: 1.9rem; margin: 8px 0; }
.article-head .meta { color: var(--muted); font-size: .85rem; margin: 0 0 8px; }
.article-body { margin-top: 24px; }
.article-body h2 { font-size: 1.45rem; margin: 36px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--border); }
.article-body h3 { font-size: 1.2rem; margin: 28px 0 10px; }
.article-body p { margin: 14px 0; }
.article-body ul, .article-body ol { padding-left: 1.4em; }
.article-body li { margin: 6px 0; }
.article-body code {
  background: var(--panel-2); padding: 2px 6px; border-radius: 4px; font-size: .9em;
}
.article-body pre {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 14px; overflow-x: auto;
}
.article-body pre code { background: none; padding: 0; }
.article-body blockquote {
  margin: 16px 0; padding: 8px 16px; border-left: 4px solid var(--accent);
  background: var(--panel); color: var(--muted);
}
.article-body table { border-collapse: collapse; width: 100%; margin: 16px 0; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; }
.article-body th { background: var(--panel-2); }

.ssl-cta {
  margin: 48px 0; padding: 20px 24px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(79,140,255,.12), rgba(122,208,255,.08));
  border: 1px solid var(--border);
}
.ssl-cta h2 { margin: 0 0 8px; font-size: 1.1rem; }
.ssl-cta p { margin: 0; color: var(--muted); }

.cat-head h1 { font-size: 1.9rem; margin: 8px 0; }

/* footer */
.site-footer { margin-top: 64px; border-top: 1px solid var(--border); background: var(--panel); }
.site-footer .wrap { padding-top: 24px; padding-bottom: 32px; }
.ssl-promo { font-size: .95rem; }
.copy { color: var(--muted); font-size: .85rem; }

/* legacy archive */
.legacy { padding-top: 24px; }
.legacy-note {
  background: #3a2a12; border: 1px solid #6b5220; color: #ffd9a0;
  padding: 10px 14px; border-radius: 8px; font-size: .9rem;
}
.legacy-grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.legacy-cat h2 { font-size: 1.15rem; margin: 0 0 6px; }
.legacy-info th { text-align: left; padding-right: 16px; vertical-align: top; color: var(--muted); }
.legacy-info td { padding: 4px 0; }
.legacy-thumb { max-width: 100%; height: auto; }

/* portal grid (top) */
.portal-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); margin: 8px 0 24px; }
.portal-card { display:block; background: var(--panel-2); border:1px solid var(--border); border-radius:12px; padding:18px; color:inherit; transition: transform .12s, border-color .12s; }
.portal-card:hover { transform: translateY(-3px); border-color: var(--accent); text-decoration:none; }
.portal-card h2 { margin:0 0 8px; font-size:1.08rem; color: var(--accent-2); font-weight: 700; }
.portal-card p { margin:0; color: var(--muted); font-size:.9rem; }

/* tables (compare / kv) */
.note { color: var(--muted); font-size: .82rem; }
.table-scroll { overflow-x: auto; margin: 16px 0; -webkit-overflow-scrolling: touch; }
table.cmp { border-collapse: collapse; width: 100%; min-width: 720px; font-size: .92rem; }
table.cmp th, table.cmp td { border: 1px solid var(--border); padding: 8px 10px; text-align: center; }
table.cmp thead th { background: var(--panel-2); position: sticky; top: 0; }
table.cmp tbody th.sticky-col, table.cmp thead th.sticky-col { text-align: left; background: var(--panel); position: sticky; left: 0; z-index: 1; }
table.cmp tbody th.sticky-col a { color: var(--accent-2); }
table.cmp small { color: var(--muted); font-weight: normal; }
.mk, td.mk-yes, td.mk-partial, td.mk-no { font-weight: 700; }
.mk-yes { color: #54e08a; }
.mk-partial { color: #ffce5c; }
.mk-no { color: #ff7a7a; }
span.mk { display:inline-block; padding:0 4px; }
table.cmp td.cell-left { text-align: left; }
.notelist .src { display:inline-block; margin-left:6px; font-size:.8rem; color: var(--muted); }
.notelist .src a { color: var(--accent-2); }

table.kv { border-collapse: collapse; margin: 16px 0; width: 100%; max-width: 560px; }
table.kv th, table.kv td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
table.kv th { background: var(--panel-2); width: 40%; }
.note-block { background: var(--panel); border:1px solid var(--border); border-radius:8px; padding:14px 16px; }

/* notes / dl */
.notes { margin: 32px 0; }
.notelist dt { font-weight: 700; margin-top: 14px; color: var(--accent-2); }
.notelist dd { margin: 4px 0 0; color: var(--muted); }

/* glossary */
.glossary-index { margin: 8px 0 20px; line-height: 2; }
.glossary-index a { display:inline-block; background: var(--panel-2); border:1px solid var(--border); border-radius: 6px; padding: 1px 8px; margin: 0 4px 4px 0; font-size:.85rem; }
dl.glossary dt { font-weight: 700; margin-top: 18px; color: var(--accent-2); scroll-margin-top: 70px; }
dl.glossary dt small { color: var(--muted); font-weight: normal; }
dl.glossary dd { margin: 4px 0 0; }

/* checklist */
.check-section { margin: 24px 0; }
ul.checklist { list-style: none; padding-left: 0; }
ul.checklist li { padding: 6px 0 6px 30px; position: relative; border-bottom: 1px dashed var(--border); }
ul.checklist li::before { content: "\2610"; position: absolute; left: 4px; color: var(--accent); font-size: 1.1em; }
.faq dt { font-weight: 700; margin-top: 16px; color: var(--accent-2); }
.faq dd { margin: 4px 0 0; color: var(--muted); }

/* tool form */
.tool-form { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end; background: var(--panel); border:1px solid var(--border); border-radius: 12px; padding: 16px; margin: 16px 0; }
.tool-form label { display: flex; flex-direction: column; gap: 6px; font-size: .9rem; color: var(--muted); }
.tool-form input { background: var(--bg); border:1px solid var(--border); color: var(--text); border-radius: 8px; padding: 8px 10px; width: 200px; }
.tool-form button { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color:#06122b; font-weight:700; border:0; border-radius:8px; padding:10px 20px; cursor:pointer; }
.row-current { background: rgba(79,140,255,.10); }
.badge { background: var(--accent); color:#06122b; font-size:.72rem; padding:1px 6px; border-radius:6px; font-weight:700; }

/* article meta extras */
.meta .updated { color: var(--accent-2); }
.tags .tag { display:inline-block; background: var(--panel-2); border:1px solid var(--border); border-radius: 6px; padding: 1px 8px; margin: 0 4px 4px 0; font-size:.8rem; color: var(--muted); }
.sources, .related { margin: 36px 0; }
.sources h2, .related h2 { font-size: 1.25rem; border-bottom:1px solid var(--border); padding-bottom:6px; }
.sources ul { color: var(--muted); }

/* footer links */
.footer-links { display:flex; flex-wrap:wrap; gap: 14px; margin: 12px 0; }
.footer-links a { color: var(--muted); font-size: .85rem; }

@media (max-width: 600px) {
  .hero h1 { font-size: 1.55rem; }
  .site-nav a { margin-left: 12px; }
  .tool-form input { width: 100%; }
}