:root {
  color-scheme: light;
  --bg: #f7f4ef;
  --surface: #ffffff;
  --text: #161616;
  --muted: #66615a;
  --line: #dfd8cb;
  --accent: #c9a96e;
  --accent-dark: #8f7138;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(247, 244, 239, 0.92);
}

.nav {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  font-size: 20px;
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--text);
  position: relative;
  flex: 0 0 auto;
}

.brand-mark::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -4px;
  width: 12px;
  height: 12px;
  border: 3px solid var(--accent);
  border-left: 0;
  border-top: 0;
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.page {
  width: min(100%, 840px);
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.hero {
  padding: 72px 24px 80px;
}

.hero-inner {
  width: min(100%, 960px);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 700;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin: 42px 0 12px;
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0;
}

h3 {
  margin: 28px 0 8px;
  font-size: 18px;
}

p {
  margin: 0 0 16px;
}

ul {
  margin: 0 0 18px;
  padding-left: 1.4em;
}

li + li {
  margin-top: 6px;
}

.lead {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
}

.panel {
  margin-top: 32px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.notice {
  border-left: 4px solid var(--accent);
  padding: 12px 0 12px 16px;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  width: min(100%, 960px);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 640px) {
  .nav,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .page {
    padding-top: 44px;
  }

  .hero {
    padding-top: 52px;
  }
}