:root {
  --bg: #f3f9ff;
  --paper: #ffffff;
  --ink: #102544;
  --muted: #4e6686;
  --line: #d8e5f8;
  --line-strong: #b8cff5;
  --accent: #2563eb;
  --accent-2: #22d3ee;
  --accent-3: #1e40af;
  --max: 1120px;
  --radius: 14px;
  --shadow: 0 16px 36px rgba(15, 55, 112, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;
  line-height: 1.68;
  background:
    radial-gradient(900px 500px at 3% -12%, rgba(37, 99, 235, 0.24), transparent 64%),
    radial-gradient(880px 520px at 95% 0%, rgba(34, 211, 238, 0.16), transparent 58%),
    linear-gradient(180deg, #f8fcff 0%, #eef5ff 100%);
}

a {
  color: inherit;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip:focus {
  left: 16px;
  top: 10px;
  z-index: 99;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 8px 12px;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 16px 42px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0 14px;
}

.brand {
  display: grid;
  text-decoration: none;
  gap: 2px;
}

.brand strong {
  font-size: 16px;
}

.brand span {
  color: var(--muted);
  font-size: 12px;
}

.header-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.header-nav a {
  text-decoration: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 7px 10px;
  font-size: 12px;
  transition: 0.2s ease;
}

.header-nav a:hover {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

.header-nav .header-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.22);
  font-weight: 700;
}

main {
  display: grid;
  gap: 18px;
}

.section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
  padding: 20px 16px;
}

.hero {
  background:
    radial-gradient(circle at 90% 5%, rgba(34, 211, 238, 0.24), transparent 40%),
    linear-gradient(150deg, rgba(37, 99, 235, 0.08), rgba(255, 255, 255, 0.92) 38%);
}

.kicker {
  display: inline-flex;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  color: var(--accent-3);
  background: rgba(255, 255, 255, 0.92);
}

h1,
h2,
h3 {
  margin: 0 0 8px;
  line-height: 1.33;
}

h1 {
  font-size: clamp(26px, 4vw, 42px);
}

h2 {
  font-size: clamp(20px, 3vw, 30px);
}

h3 {
  font-size: 18px;
}

p {
  margin: 0;
}

.lead {
  margin-top: 8px;
  color: var(--muted);
}

.subtle {
  color: var(--muted);
  font-size: 14px;
}

.grid {
  display: grid;
  gap: 12px;
}

.grid.cols-2 {
  grid-template-columns: 1fr;
}

.grid.cols-3 {
  grid-template-columns: 1fr;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  padding: 14px;
}

.card p,
.card li {
  color: var(--muted);
}

.list {
  margin: 8px 0 0;
  padding-left: 18px;
}

.list li {
  margin: 5px 0;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: #fff;
  padding: 0 14px;
  transition: 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: #f1f7ff;
}

.btn-primary {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  filter: brightness(1.05);
}

.table-wrap {
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow-x: auto;
  background: #fff;
  margin-top: 10px;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 850px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

th {
  background: #f4f8ff;
  color: var(--muted);
  font-size: 12px;
}

tr:last-child td {
  border-bottom: 0;
}

.score {
  display: inline-flex;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: #f2f8ff;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-3);
}

.checklist {
  margin: 0;
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.checklist li {
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  padding: 10px 12px;
  background: #f7fbff;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  background: #fff;
}

.faq details + details {
  margin-top: 8px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

.faq p {
  margin-top: 8px;
  color: var(--muted);
}

.notice {
  border-left: 4px solid var(--accent);
  padding: 10px 12px;
  background: #f2f7ff;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
}

footer {
  margin-top: 20px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  color: var(--muted);
  display: grid;
  gap: 8px;
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-links a {
  text-decoration: none;
  border-bottom: 1px dotted rgba(30, 64, 175, 0.4);
}

.footer-links a:hover {
  border-bottom-color: rgba(30, 64, 175, 0.8);
}

@media (min-width: 860px) {
  .grid.cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}