:root {
  color-scheme: light;
  --background: #ffffff;
  --surface: #ffffff;
  --text: #111111;
  --muted: #666666;
  --header: #171717;
  --border: #ececec;
  --label: #f4f4f4;
  --shadow: 0 2px 5px rgb(0 0 0 / 10%);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Noto Sans JP",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic",
    Meiryo,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--background);
  line-height: 1.85;
  overflow-wrap: anywhere;
}

.page {
  width: min(1120px, calc(100% - 48px));
  margin: 20px auto 0;
}

.site-header {
  display: flex;
  align-items: center;
  min-height: 110px;
  padding: 24px 40px;
  color: #ffffff;
  background: var(--header);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}

main {
  margin-top: 58px;
}

.card {
  padding: 48px 52px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 26px;
  box-shadow: 0 1px 3px rgb(0 0 0 / 3%);
}

.intro {
  font-size: clamp(1rem, 2.1vw, 1.28rem);
}

.intro p {
  margin: 0 0 24px;
}

.intro p:last-child {
  margin-bottom: 0;
}

hr {
  margin: 44px 0;
  border: 0;
  border-top: 1px solid #dddddd;
}

.section-label {
  display: inline-block;
  margin: 0 0 28px;
  padding: 8px 18px;
  font-size: 1.15rem;
  line-height: 1.5;
  background: var(--label);
  border-radius: 12px;
}

.service-list {
  margin: 0;
  padding-left: 1.4em;
  font-size: 1.05rem;
}

.service-list li + li {
  margin-top: 8px;
}

.operator-info {
  margin: 0;
  font-size: 1.05rem;
}

.operator-info div {
  display: grid;
  grid-template-columns: 7em 1fr;
  gap: 12px;
  padding: 7px 0;
}

.operator-info dt {
  font-weight: 700;
}

.operator-info dd {
  margin: 0;
}

.pending {
  color: var(--muted);
}

footer {
  padding: 28px 8px 36px;
  color: var(--muted);
  text-align: center;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  white-space: nowrap;
  border: 0;
  clip: rect(0, 0, 0, 0);
}

@media (max-width: 640px) {
  .page {
    width: min(100% - 24px, 1120px);
    margin-top: 12px;
  }

  .site-header {
    min-height: 86px;
    padding: 20px 24px;
    border-radius: 18px;
  }

  main {
    margin-top: 24px;
  }

  .card {
    padding: 28px 22px;
    border-radius: 18px;
  }

  .intro {
    line-height: 1.9;
  }

  .intro p {
    margin-bottom: 20px;
  }

  hr {
    margin: 32px 0;
  }

  .section-label {
    margin-bottom: 20px;
  }

  .operator-info div {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 9px 0;
  }

  .operator-info dt::after {
    content: "：";
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}