/* Research & Insights only; separate stylesheet keeps legacy pages untouched until Step 5. */
:root { --insight-border: #cbd8df; --insight-muted: #526373; }
.insights-site { overflow-x: clip; }
.insight-preview-flag { background: #fff0cf; color: #5e4208; border-bottom: 1px solid #e8cf8f; font-size: .84rem; font-weight: 700; padding: .45rem 0; }
.insight-preview-flag .container { display: block; }
.insights-hero { padding-bottom: clamp(3.4rem, 5vw, 5.1rem); }
.insights-hero .hero-inner { max-width: 69rem; }
.insights-hero .lead { max-width: 58rem; }
.insights-list-section { padding: clamp(1rem, 3vw, 2rem) 0 clamp(4rem, 8vw, 6rem); }
.insights-list-head { display:flex; align-items:center; justify-content:space-between; gap:1rem; color: var(--insight-muted); font-size:.88rem; }
.insights-list-head .eyebrow { margin:0; }
.insights-feature-card { display:grid; grid-template-columns:minmax(0, 1.65fr) minmax(13rem,.82fr); min-width:0; overflow:hidden; border-radius: .72rem; background:var(--rr-white); border:1px solid var(--insight-border); box-shadow:0 14px 35px rgb(16 58 92 / .055); }
.insights-feature-copy { padding:clamp(1.55rem,4vw,3.2rem); }
.insight-pill { display:inline-flex; align-items:center; padding:.36rem .65rem; background:#e7f2f0; color:#275d62; font-size:.78rem; line-height:1.3; font-weight:800; border:1px solid #cadfdd; border-radius: 100rem; }
.insights-feature-copy h2 { font-size:clamp(1.75rem,3.15vw,3rem); letter-spacing:-.028em; margin:1.05rem 0 .65rem; line-height:1.22; }
.insights-feature-copy h2 a { color:var(--rr-navy); text-decoration:none; }
.insights-feature-copy h2 a:hover { text-decoration:underline; }
.insights-feature-deck { font-weight:700; color:#385b70; font-size:1.12rem; margin:.3rem 0 1rem; }
.insights-feature-copy > p:not(.insights-feature-deck) { max-width:64ch; color:#455661; }
.insights-feature-meta { display:flex; flex-wrap:wrap; gap:.6rem 1.2rem; font-size:.84rem; color: var(--insight-muted); padding-top:.5rem; }
.insights-actions { display:flex; flex-wrap:wrap; align-items:center; gap:.9rem 1.25rem; margin-top:1.75rem; }
.insight-crosslink { font-size:.93rem; font-weight:750; }
.insights-feature-visual { position:relative; min-height:22rem; background: radial-gradient(circle at 90% 20%,#418e9b 0,transparent 55%), linear-gradient(150deg,#164667 15%,#0e2c47 75%); overflow:hidden; padding:2.2rem; color:#e9f4f7; }
.insights-feature-visual::before,.insights-feature-visual::after { content:''; position:absolute; border:1px solid rgb(227 243 246 / .33); border-radius:50%; width:24rem; height:24rem; top:25%; left:25%; }
.insights-feature-visual::after { width:15rem; height:15rem; top:39%; left:38%; border-width:2px; }
.insights-visual-tag { position:relative; z-index:1; font-size:.77rem; letter-spacing:.22em; font-weight:800; line-height:1.6; }
.insights-visual-lines { position:absolute; top:30%; left:13%; right:10%; display:grid; gap:1.35rem; opacity:.65; }
.insights-visual-lines span { display:block; border-top:1px solid #95c2c9; transform:rotate(-14deg); }
.insights-visual-mark { position:absolute; right:2.3rem; bottom:1.75rem; z-index:1; font-size:4.7rem; line-height:1; font-weight:250; }
.insights-visual-mark span { font-size:.85rem; letter-spacing:.1em; margin-left:.4rem; }
.insights-about-section { background:#fff; border-top:1px solid var(--rr-mist); padding:clamp(3rem,7vw,5.25rem) 0; }
.insights-about-section h2 { font-size:clamp(1.45rem,2.5vw,2.2rem); margin:.2rem 0 1rem; }
.insights-about-section p { max-width:66ch; }
.insights-note-panel { background:var(--site-soft-blue); border-left:4px solid var(--rr-blue); padding:1.4rem; }
.insights-note-panel h2 { font-size:1.25rem; }
.insights-note-panel a { font-weight:700; }
/* Articles */
.insights-article-outer { max-width: 77rem; padding:clamp(1.8rem,5vw,4.1rem) 0 clamp(4rem,8vw,7rem); }
.insight-article { max-width: 57.5rem; margin-inline:auto; min-width:0; }
.insight-article-header { min-width:0; }
.insight-article-header .eyebrow { margin-bottom:1.2rem; }
.insight-article-header h1 { font-size:clamp(2.3rem,5vw,4.15rem); line-height:1.19; max-width:25ch; letter-spacing:-.036em; }
.insight-article-header .article-deck { font-size:clamp(1.15rem,2.5vw,1.6rem); line-height:1.52; font-weight:650; color:#496272; max-width:48rem; margin:1.1rem 0 1.9rem; }
.insight-publish-row { display:flex; flex-wrap:wrap; align-items:center; gap:.65rem 1rem; margin-top:1.3rem; font-size:.91rem; color:var(--insight-muted); }
.insight-article-header > hr { display:none; }
.insight-disclaimer { margin-top:1.8rem; padding:1rem 1.25rem; background:var(--site-soft-teal); border-left:4px solid var(--rr-protocol-teal); }
.insight-disclaimer strong { display:block; margin-bottom:.25rem; color:var(--rr-navy); }
.insight-disclaimer p { margin:0; }
.insight-toc { border:1px solid var(--insight-border); background:#fff; border-radius:.6rem; margin:1.9rem 0 2.4rem; }
.insight-toc summary { display:flex; cursor:pointer; justify-content:space-between; gap:1rem; align-items:center; padding:1.1rem 1.2rem; font-weight:800; color:var(--rr-navy); }
.insight-toc summary::marker { color:var(--rr-blue); }
.insight-toc details[open] .toc-hint { transform:rotate(45deg); }
.insight-toc .toc-hint { font-size:1.35rem; line-height:1; transition: transform .15s ease; }
.insight-toc-inner { border-top:1px solid var(--rr-mist); padding:.55rem 1.35rem 1.5rem; }
.insight-toc ol { list-style:none; padding-left:1.25rem; }
.insight-toc > details > .insight-toc-inner > ol { columns:2; column-gap:2rem; }
.insight-toc-inner > ol > li { break-inside:avoid; margin:.55rem 0 1.1rem; font-weight:700; line-height:1.5; }
.insight-toc-inner > ol > li ol { columns:1; padding-left:1rem; margin:.5rem 0 0; }
.insight-toc-inner > ol > li li { margin:.45rem 0; font-size:.89rem; font-weight:400; }
.insight-article-body { font-size:clamp(1.01rem,1.15vw,1.095rem); line-height:1.86; overflow-wrap:break-word; }
.insight-article-body h2 { margin:3.2rem 0 1.35rem; padding-top:1.1rem; border-top:1px solid var(--rr-mist); font-size:clamp(1.62rem,2.4vw,2.08rem); line-height:1.38; }
.insight-article-body h3 { margin:2rem 0 .9rem; font-size:clamp(1.24rem,1.6vw,1.45rem); line-height:1.44; }
.insight-article-body p { margin: 0 0 1.23rem; }
.insight-article-body hr { border:0; border-top:1px solid var(--rr-mist); margin:2.2rem 0 .7rem; }
.insight-article-body h2 + p { margin-top:0; }
.insight-article-body h2[id], .insight-article-body h3[id], .insight-article-body strong[id] { scroll-margin-top:7.5rem; }
.insight-article-body ul, .insight-article-body ol { padding-left:1.5rem; }
.insight-article-body li { margin-bottom:.5rem; }
.insight-article-body blockquote { margin:1.75rem 0; padding:1.2rem 1.45rem; background:var(--site-soft-blue); border-left:4px solid var(--rr-blue); font-size:1.04em; font-weight:650; }
.insight-article-body blockquote p:last-child { margin:0; }
.insight-article-body .citation { display:inline-block; text-decoration:none; border-radius:.2rem; background:#eaf1f5; padding:.05rem .2rem; margin-inline:.1rem; font-size:.79em; white-space:nowrap; font-weight:700; vertical-align:baseline; }
.insight-article-body .citation:hover, .insight-article-body .citation:focus-visible { background:#c6e3ed; }
.insight-article-body .reference-backlink { margin-left:.65rem; font-weight:700; }
.insight-article-body .source-url { overflow-wrap:anywhere; word-break:break-word; font-size:.94em; }
.insight-table-scroll { max-width:100%; overflow-x:auto; margin:1.6rem 0 1.9rem; border:1px solid var(--insight-border); border-radius:.5rem; background:#fff; }
.insight-table-scroll table { min-width:37rem; width:100%; border-spacing:0; border-collapse:collapse; font-size:.91em; line-height:1.55; }
.insight-table-scroll th,.insight-table-scroll td { padding:.85rem 1rem; text-align:left; vertical-align:top; border-right:1px solid #dce6e9; border-bottom:1px solid #dce6e9; }
.insight-table-scroll th { color:var(--rr-navy); background:#eaf1f5; font-weight:800; white-space:normal; }
.insight-table-scroll tr:nth-child(even) td { background:#f9fbfa; }
.insight-table-scroll tr:last-child td { border-bottom:none; }
.insight-table-scroll th:last-child,.insight-table-scroll td:last-child { border-right:none; }
.insight-table-scroll:focus-visible { outline:2px solid var(--rr-blue); outline-offset:3px; }
.visually-hidden { position:absolute!important; width:1px!important; height:1px!important; overflow:hidden!important; clip:rect(0,0,0,0)!important; white-space:nowrap!important; }
.insight-article-footer { border-top:3px solid var(--rr-navy); margin-top:4rem; padding-top:1.5rem; display:flex; flex-wrap:wrap; gap:.7rem 1.5rem; align-items:center; }
.insight-article-footer > div { width:100%; }
.insight-article-footer > div strong { color:var(--rr-navy); }
.insight-article-footer > div p { margin:.3rem 0; color:#41515b; }
.insight-article-footer > p { width:100%; color:var(--insight-muted); font-size:.93rem; margin:0 0 .6rem; }
html[lang="ja"] .insight-article-body { line-height:1.95; }
html[lang="ja"] .insight-article-header h1 { max-width: 27ch; }
html[lang="ja"] .insight-article-header .article-deck { font-size:clamp(1.1rem,2.25vw,1.48rem); }
/* Shared header, brand, navigation and footer styles come exclusively from site.css. */
@media (max-width:58rem) {
  .insights-feature-card { grid-template-columns:1fr; }
  .insights-feature-visual { min-height:12rem; }
}
@media (max-width:42rem) {
  .insights-list-head { align-items:flex-start; flex-direction:column; margin-bottom:1rem; }
  .insight-toc-inner > ol { columns:1!important; }
  .insight-article-body { font-size:1.03rem; }
  .insight-article-body h2 { margin-top:2.4rem; }
  .insights-feature-copy { padding:1.5rem; }
  .insights-visual-mark { font-size:3.4rem; }
}
@media (prefers-reduced-motion: reduce) { .insight-toc .toc-hint { transition:none; } }
@media print { .insight-preview-flag,.insight-toc,.insights-article-outer .insight-article-footer .button { display:none!important; } .insight-article { max-width:none; } .insight-table-scroll { overflow:visible; } }