:root {
  --color-white: #ffffff;
  --color-ink: #181818;
  --color-muted: #424242;
  --color-blue: #1558d6;
  --color-blue-deep: #0f409e;
  --color-blue-dark: #0b285f;
  --color-blue-pale: #f2f6fd;
  --color-line: #dedede;
  --font-sans: "Rubik", "Noto Sans JP", sans-serif;
  --font-display: "Rubik", "Noto Sans JP", sans-serif;
  --content-width: 1200px;
  --page-gutter: clamp(20px, 4vw, 64px);
  --section-space: clamp(96px, 11vw, 160px);
  --radius-small: 6px;
  --radius-medium: 16px;
  --transition-fast: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-white);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

::selection {
  background: var(--color-blue);
  color: var(--color-white);
}