/* ===== Design tokens ===== */
:root {
  /* ロゴ（水滴アイコン：青×緑）から抽出した配色。目視ベースの暫定値のため、
     ロゴの実ファイルを受け取り次第、正確な値に調整すること。 */
  --color-bg: #f5f7f8;
  --color-surface: #ffffff;
  --color-ink: #1c2126;
  --color-ink-soft: #5a6570;
  --color-primary: #2e7bc6;
  --color-primary-dark: #1f5a94;
  --color-primary-soft: #e7f1fa;
  --color-accent: #7cb342;
  --color-accent-dark: #5d9130;
  --color-line: #dde2e6;
  --color-danger: #b3452f;
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 20px;
  --maxw: 1120px;
  --shadow-card: 0 2px 6px rgba(20, 30, 20, 0.06), 0 10px 24px -12px rgba(20, 30, 20, 0.18);
  --font-body: "Hiragino Sans", "Yu Gothic Medium", "Yu Gothic", "Noto Sans JP", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: "Hiragino Sans", "Yu Gothic Medium", "Yu Gothic", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-dark); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.5;
  margin: 0 0 .6em;
  text-wrap: balance;
}
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.4em; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Site header ===== */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
}
.site-logo {
  font-weight: 700;
  font-size: 20px;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: .02em;
}
.global-nav { display: flex; align-items: center; gap: 4px; }
.global-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
}
.global-nav a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-s);
  color: var(--color-ink);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
}
.global-nav a:hover,
.global-nav a[aria-current="page"] {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
}
.header-cta {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 14.5px;
  text-decoration: none;
  white-space: nowrap;
}
.header-cta:hover { background: var(--color-accent-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-s);
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; }

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .global-nav {
    position: fixed;
    inset: 68px 0 0 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .15s ease, transform .15s ease;
  }
  .global-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .global-nav ul { flex-direction: column; gap: 2px; width: 100%; }
  .global-nav a { padding: 14px 12px; font-size: 16px; }
  .header-cta { margin-top: 12px; text-align: center; }
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  font-size: 13px;
  color: var(--color-ink-soft);
  padding: 14px 0;
}
.breadcrumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumb li { display: flex; align-items: center; gap: 6px; }
.breadcrumb li:not(:last-child)::after { content: "/"; opacity: .5; }
.breadcrumb a { color: var(--color-ink-soft); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current] { color: var(--color-ink); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15.5px;
  text-decoration: none;
  border: none;
  cursor: pointer;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); }
.btn-outline { background: transparent; color: var(--color-primary-dark); border: 1px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary-soft); }

/* ===== Sections ===== */
.section { padding: 64px 0; }
.section-head { max-width: 640px; margin: 0 0 36px; }
.eyebrow {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
  padding: 4px 12px;
  border-radius: 999px;
  margin: 0 0 12px;
}
.section-head h2 { font-size: clamp(22px, 3vw, 30px); margin: 0 0 10px; }
.section-head p { color: var(--color-ink-soft); margin: 0; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-m);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

/* ===== Site footer ===== */
.site-footer { background: var(--color-primary-dark); color: #eaf1f8; margin-top: 80px; }
.site-footer .container { padding-top: 48px; padding-bottom: 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.footer-brand { font-weight: 700; font-size: 18px; margin-bottom: 10px; }
.footer-brand p { color: #bcd2e8; font-size: 14px; margin: 0; }
.footer-col h3 { font-size: 13px; letter-spacing: .04em; color: #9fb8d4; margin-bottom: 12px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: #eaf1f8; text-decoration: none; font-size: 14.5px; }
.footer-col a:hover { text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12.5px;
  color: #9fb8d4;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===== Utility ===== */
.mono { font-family: "SFMono-Regular", Consolas, Menlo, monospace; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}