:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    sans-serif;
  color: #10263f;
  background: #f5faff;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -20%, #dff3ff 0, transparent 42rem),
    #f5faff;
}

main {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 52px 0 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 34px;
  color: #087fa8;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 11px;
  color: #fff;
  background: #159cf2;
  box-shadow: 0 8px 24px rgb(21 156 242 / 24%);
}

article {
  padding: clamp(24px, 6vw, 52px);
  border: 1px solid rgb(16 38 63 / 8%);
  border-radius: 30px;
  background: rgb(255 255 255 / 94%);
  box-shadow: 0 24px 70px rgb(16 38 63 / 8%);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.3rem);
  line-height: 1.03;
  letter-spacing: -0.045em;
}

h2 {
  margin: 38px 0 12px;
  font-size: 1.22rem;
  letter-spacing: -0.015em;
}

p,
li {
  line-height: 1.62;
}

p {
  margin: 12px 0;
}

ul,
ol {
  padding-left: 22px;
}

li + li {
  margin-top: 8px;
}

.lead {
  margin-top: 18px;
  color: #50647b;
  font-size: 1.08rem;
}

.meta,
.note {
  color: #60758b;
  font-size: 0.92rem;
}

.note {
  padding: 16px 18px;
  border-radius: 16px;
  background: #eef8ff;
}

a {
  color: #087fa8;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding: 0 20px;
  border-radius: 15px;
  color: #fff;
  background: #087fa8;
  font-weight: 700;
  text-decoration: none;
}

footer {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  padding: 24px 4px 0;
  color: #60758b;
  font-size: 0.9rem;
}

@media (max-width: 520px) {
  main {
    width: min(100% - 20px, 760px);
    padding-top: 24px;
  }

  article {
    border-radius: 24px;
  }
}