* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "メイリオ", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: #1c1c1e;
  background: #f7f7f8;
  margin: 0;
  padding: 24px 16px 64px;
  -webkit-text-size-adjust: 100%;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  padding: 32px 28px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

header {
  border-bottom: 1px solid #e5e5ea;
  padding-bottom: 16px;
  margin-bottom: 24px;
}

h1 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 6px;
  color: #1c1c1e;
}

.app-name {
  font-size: 13px;
  color: #8e8e93;
  margin: 0;
}

.meta {
  font-size: 13px;
  color: #8e8e93;
  margin-top: 8px;
}

h2 {
  font-size: 17px;
  font-weight: 600;
  margin: 28px 0 10px;
  color: #1c1c1e;
}

h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 18px 0 8px;
  color: #1c1c1e;
}

p {
  margin: 0 0 12px;
}

ul, ol {
  padding-left: 22px;
  margin: 0 0 12px;
}

li {
  margin: 6px 0;
}

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

a:hover {
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid #e5e5ea;
  vertical-align: top;
}

th {
  width: 35%;
  background: #f7f7f8;
  font-weight: 600;
  color: #3c3c43;
}

footer {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid #e5e5ea;
  font-size: 12px;
  color: #8e8e93;
  text-align: center;
}

.back-link {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 14px;
}

.notice {
  background: #fff8e1;
  border-left: 3px solid #ffc107;
  padding: 12px 14px;
  margin: 16px 0;
  font-size: 14px;
  border-radius: 0 6px 6px 0;
}

.index-list {
  list-style: none;
  padding: 0;
}

.index-list li {
  margin: 12px 0;
}

.index-list a {
  display: block;
  padding: 14px 16px;
  background: #f7f7f8;
  border-radius: 8px;
  color: #1c1c1e;
  font-weight: 500;
  transition: background 0.15s;
}

.index-list a:hover {
  background: #efeff4;
  text-decoration: none;
}