:root {
  --color-ink: #f6f1e7;
  --color-muted: #c9c1ad;
  --color-dim: #8f8795;
  --color-night: #070910;
  --color-navy: #10172a;
  --color-navy-soft: #17223d;
  --color-gold: #c7a45a;
  --color-gold-soft: #e2cf91;
  --color-line: rgba(226, 207, 145, 0.28);
  --color-panel: rgba(13, 18, 32, 0.82);
  --font-serif: "Times New Roman", "Yu Mincho", "Hiragino Mincho ProN", "YuMincho", serif;
  --font-sans: "Segoe UI", "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --content-width: 1120px;
  --header-height: 76px;
  --space-section: clamp(4rem, 8vw, 7rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height: 1.8;
  background: var(--color-night);
}

body.is-nav-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--color-gold-soft);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0;
}

h1 {
  margin-bottom: 1.25rem;
  font-size: clamp(3.5rem, 11vw, 8rem);
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
}

h3 {
  margin-bottom: 0.8rem;
  font-size: 1.45rem;
}

p {
  margin-bottom: 1rem;
}

ul {
  padding-left: 1.25rem;
}

:focus-visible {
  outline: 3px solid var(--color-gold-soft);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  color: var(--color-night);
  background: var(--color-gold-soft);
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}