:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #d1d5db;
  --header: #e5e7eb;
  --link: #0f4c81;
  --link-hover: #0b3a63;
  --focus: #111827;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 24px 16px;
  font-family:
    "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo",
    sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
body::-webkit-scrollbar {
  display: none;
}
h1,
p,
a {
  max-width: 920px;
  margin: auto;
  color: var(--text);
  text-align: center;
}
.enterpass {
  text-align: center;
}
input,
button {
  font-family: inherit;
  font-size: 18px;
  border-radius: 0.25rem;
  border: 1px solid #707070;
  outline: none;
  padding: 0.375em 0.75em;
}
input:focus {
  border-color: rgba(var(--color_rgb), 0.5);
  box-shadow: 0 0 3px 1px rgba(var(--color_rgb), 0.5);
}
#message {
  margin: 2rem;
  color: crimson;
  font-weight: bold;
}
/* pdf.index */
table {
  width: min(920px, 100%);
  margin: 1rem auto;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background-color: var(--surface);
}

th,
td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

thead th {
  background-color: var(--header);
  font-weight: 700;
  color: #111827;
  text-align: center;
}
tbody tr:last-child td {
  border-bottom: 1px solid var(--border);
}
tbody tr td:nth-child(2n),
tbody tr td:nth-child(3) {
  text-align: center;
}

a {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--link);
  border-radius: 6px;
  color: var(--link);
  font-weight: 600;
  text-decoration: none;
  transition:
    background-color 0.18s ease,
    color 0.18s ease;
}

a:hover {
  background-color: var(--link);
  color: #ffffff;
}

a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
.accordion {
  margin: 2em 0;
}
.accordion__summary {
  display: block;
  background: #b2e5ff; /* 見出しの背景色 */
  font-weight: bold;
  position: relative;
  list-style: none; /* 矢印を消す */
  cursor: pointer;
  padding: 10px 38px 10px 10px;
  border-radius: 10px;
}
.accordion__summary::-webkit-details-marker {
  display: none;
}
.accordion__summary::after {
  content: "+";
  font-size: 1.4em; /* 記号のサイズ */
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
}
.accordion[open] .accordion__summary::after {
  content: "−";
}
@media (max-width: 640px) {
  body {
    padding: 12px;
  }

  th,
  td {
    padding: 10px 10px;
    font-size: 14px;
  }

  a {
    width: 100%;
    text-align: center;
    font-size: 10px;
    margin: 0 1rem 0 0;
  }
}