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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f5f5f7;
}

a {
  color: #007aff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.headerBackground {
  background: linear-gradient(180deg, #111827 0%, #1f2937 100%);
  padding-bottom: 32px;
}

.subPageContainer {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 8px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 14px;
}

.appIconShadow {
  display: flex;
  align-items: center;
}

.headerIcon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.headerName {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
}

.page {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  padding: 40px 48px;
  margin-bottom: 48px;
}

.markdown-body h1 {
  margin: 0 0 16px;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.25;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 12px;
}

.markdown-body h2 {
  margin: 32px 0 12px;
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
}

.markdown-body h3 {
  margin: 24px 0 8px;
  font-size: 1.1rem;
  font-weight: 600;
}

.markdown-body p,
.markdown-body li {
  color: #374151;
}

.markdown-body ul {
  padding-left: 1.4rem;
}

.markdown-body li + li {
  margin-top: 6px;
}

.markdown-body strong {
  color: #111827;
}

@media (max-width: 640px) {
  .page {
    padding: 28px 20px;
    border-radius: 12px;
  }

  .markdown-body h1 {
    font-size: 1.6rem;
  }
}