:root {
  --bg: #f4f7fb;
  --bg-soft: #e9eff8;
  --bg-soft-2: #f8fafe;
  --ink: #13233d;
  --sub: #4e6483;
  --line: #c8d5e8;
  --accent: #5c82be;
  --accent-deep: #234574;
  --mint: #7397d1;
  --mint-deep: #2d568f;
  --cream: #edf3fb;
  --navy: #183760;
  --navy-soft: #2e4e7e;
  --navy-deep: #0f2340;
  --glow: #d9e7fb;
  --orange: #f4701e;
  --orange-deep: #c45510;
  --orange-soft: #fff3ec;
  --section-dark: #0f2340;
  --section-medium: #1a3a6b;
  --serif: "Noto Serif JP", serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.72;
}

h1,
h2,
h3,
.logo {
  font-family: "Zen Maru Gothic", "Zen Kaku Gothic New", sans-serif;
}

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

img {
  display: block;
  width: 100%;
  height: auto;
}

.shell {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.note {
  color: var(--sub);
  font-size: 0.9rem;
}

.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(0, 0, 0, 0.08);
  z-index: 100;
}

.scroll-meter span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--navy));
}