:root { --ink: #203448; --muted: #526575; --line: #dbe4eb; --blue: #286090; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { padding: 0; color: var(--ink); background: #fff; font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; font-size: 15px; line-height: 1.85; }
a { color: var(--blue); text-underline-offset: 4px; }
a:hover { color: #183e5e; }
a:focus-visible, summary:focus-visible { outline: 3px solid #d17016; outline-offset: 5px; }
.page-width { width: min(1080px, calc(100% - 48px)); margin-inline: auto; }
.skip-link { position: absolute; left: 16px; top: -80px; padding: 10px 18px; background: white; z-index: 10; }
.skip-link:focus { top: 8px; }
.site-header { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 94px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 700; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand img { object-fit: contain; }
nav { display: flex; gap: 26px; font-size: 14px; }
nav a { color: var(--muted); }
.intro { padding: 52px 0 38px; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .09em; color: var(--muted); margin: 0 0 10px; }
h1 { font-size: clamp(27px, 3.5vw, 40px); line-height: 1.6; font-weight: 700; margin: 0 0 18px; letter-spacing: .015em; }
.intro > p:last-child { color: var(--muted); margin: 0; }
h2 { font-size: 24px; font-weight: 700; line-height: 1.6; }
.section-heading { font-size: 16px; margin: 0 0 16px; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.tool-card { padding: 28px; border: 1px solid var(--line); border-top: 4px solid var(--blue); border-radius: 8px; display: flex; flex-direction: column; }
.noshi { border-top-color: #a24646; }
.tool-heading { display: flex; align-items: center; gap: 18px; margin-bottom: 20px; }
.tool-heading img { flex-shrink: 0; }
.tool-heading .eyebrow { margin-bottom: 4px; }
h3 { font-size: 27px; line-height: 1.5; font-weight: 700; margin: 0; }
.tool-summary { font-weight: 700; font-size: 18px; margin: 0 0 9px; }
.tool-card > p:not(.tool-summary) { color: var(--muted); margin-bottom: 18px; }
.features { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0 0 22px; list-style: none; }
.features li { padding: 3px 10px; border-radius: 4px; background: #edf4fa; color: #285271; font-size: 12px; font-weight: 700; }
.noshi .features li { color: #874040; background: #faf0f0; }
.use-cases { border-top: 1px solid var(--line); padding-top: 16px; margin-top: auto; }
.use-cases h4 { font-size: 12px; font-weight: 700; margin: 0 0 7px; }
.use-cases p { font-size: 13px; color: var(--muted); margin-bottom: 23px; }
.tool-button { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 16px; background: var(--blue); border-radius: 5px; color: white; font-weight: 700; }
.tool-button:hover { background: #204e75; color: white; text-decoration: none; }
.noshi .tool-button { background: #944141; }
.noshi .tool-button:hover { background: #783535; }
.research-tool { margin-top: 24px; padding: 22px 26px; display: flex; gap: 20px; align-items: center; border: 1px solid var(--line); border-radius: 8px; }
.research-tool .eyebrow { margin-bottom: 2px; }
.research-tool h3 { font-size: 20px; }
.research-tool p:last-child { color: var(--muted); font-size: 13px; margin: 5px 0 0; }
.research-tool > a { margin-left: auto; font-size: 14px; font-weight: 700; flex-shrink: 0; }
.guide { padding: 52px 0 38px; }
.section-intro h2 { margin: 0 0 28px; }
.section-intro .eyebrow { margin-bottom: 6px; }
.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px; }
.guide-grid h3 { font-size: 18px; margin-bottom: 22px; }
.guide-grid ol { padding-left: 24px; margin: 0; }
.guide-grid li { padding-left: 6px; margin-bottom: 16px; }
.guide-grid li::marker { color: var(--blue); font-weight: 700; }
.guide-grid p { font-size: 14px; color: var(--muted); margin: 5px 0 0; }
.faq { border-top: 1px solid var(--line); padding: 30px 0 50px; }
.faq h2 { font-size: 22px; margin: 0 0 20px; }
details { border-bottom: 1px solid var(--line); padding: 16px 0; }
summary { cursor: pointer; font-weight: 700; }
details p { color: var(--muted); max-width: 800px; margin: 12px 0 0; }
.site-footer { border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 10px 22px; padding: 26px 0; color: var(--muted); font-size: 12px; }
.site-footer > span { font-weight: 700; }
.site-footer p { margin: 0; }
.site-footer > a { margin-left: auto; }
@media (max-width: 680px) {
  .page-width { width: calc(100% - 32px); }
  .site-header { min-height: 78px; gap: 12px; flex-wrap: wrap; padding-block: 15px; }
  .brand { font-size: 17px; gap: 8px; }
  nav { gap: 18px; font-size: 12px; }
  .intro { padding: 34px 0 28px; }
  .intro > p:last-child { font-size: 14px; }
  .tool-grid, .guide-grid { grid-template-columns: 1fr; gap: 20px; }
  .tool-card { padding: 22px; }
  .tool-heading { gap: 14px; }
  .tool-heading img { width: 72px; height: 72px; }
  h3 { font-size: 24px; }
  .tool-summary { font-size: 16px; }
  .tool-button { font-size: 14px; }
  .research-tool { padding: 20px; gap: 14px; flex-wrap: wrap; }
  .research-tool > div { flex: 1; min-width: 170px; }
  .research-tool > a { margin-left: 0; }
  .guide { padding-top: 38px; }
  .section-intro h2 { font-size: 22px; }
  .site-footer { display: block; }
  .site-footer p { margin: 5px 0 10px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }