:root {
  --bg: #fafaf7;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --ink-muted: #777777;
  --accent: #2563eb;
  --accent-soft: #eef2ff;
  --line: #e5e5e0;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.04);
  --max: 880px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP",
               "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 20px 64px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: saturate(180%) blur(8px);
}
.site-header .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.nav {
  display: flex;
  gap: 18px;
  font-size: 0.92rem;
}
.nav a {
  color: var(--ink-soft);
}
.nav a.active { color: var(--ink); font-weight: 600; }

/* Hero */
.hero {
  padding: 56px 0 40px;
  text-align: left;
}
.hero h1 {
  font-size: clamp(1.7rem, 4.6vw, 2.6rem);
  line-height: 1.3;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.hero p.lead {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: 0 0 20px;
  max-width: 640px;
}
.tag {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}

/* Sections */
section.block {
  margin: 32px 0;
}
section.block h2 {
  font-size: 1.25rem;
  margin: 0 0 12px;
  letter-spacing: 0.01em;
}
section.block h3 {
  font-size: 1.0rem;
  margin: 20px 0 6px;
  color: var(--ink);
}
section.block p,
section.block li {
  color: var(--ink-soft);
}

/* Value cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 8px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 18px 16px;
}
.card h3 {
  margin: 0 0 6px;
  font-size: 1.0rem;
}
.card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

/* Steps */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
  display: grid;
  gap: 10px;
}
.steps li {
  counter-increment: step;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px 14px 52px;
  position: relative;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 14px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Notice */
.notice {
  background: #fff8e6;
  border: 1px solid #f3d77a;
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 0.92rem;
  color: #5a4500;
}

/* Policy / Article */
article.doc h1 {
  font-size: 1.6rem;
  margin: 0 0 8px;
}
article.doc .meta {
  color: var(--ink-muted);
  font-size: 0.85rem;
  margin-bottom: 22px;
}
article.doc h2 {
  font-size: 1.1rem;
  margin: 28px 0 8px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
article.doc p,
article.doc li {
  color: var(--ink-soft);
  font-size: 0.97rem;
}
article.doc ul, article.doc ol {
  padding-left: 1.2em;
}

/* Form embed */
.form-embed {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px;
  overflow: hidden;
}
.form-embed iframe {
  width: 100%;
  border: 0;
  display: block;
  border-radius: 8px;
  min-height: 720px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding: 28px 20px;
  font-size: 0.85rem;
  color: var(--ink-muted);
  text-align: center;
}
.site-footer nav {
  margin-bottom: 8px;
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.site-footer a { color: var(--ink-muted); }

@media (max-width: 480px) {
  .nav { gap: 12px; font-size: 0.88rem; }
  .hero { padding: 36px 0 24px; }
}