:root {
  --accent: #3f7fc1;
  --accent-soft: #e6f4fe;
  --text: #2b3440;
  --text-sub: #5b6774;
  --bg: #ffffff;
  --bg-soft: #f6f9fc;
  --border: #dde5ec;
  --max-width: 720px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic UI",
    "Meiryo", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  -webkit-text-size-adjust: 100%;
}

header.site-header {
  background: var(--accent-soft);
  padding: 1rem 1.25rem;
}

header.site-header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

header.site-header a.brand {
  color: var(--accent);
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.05em;
}

header.site-header span.brand-sub {
  color: var(--text-sub);
  font-size: 0.8rem;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

main h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

main p.updated {
  color: var(--text-sub);
  font-size: 0.85rem;
  margin-bottom: 2rem;
}

main h2 {
  font-size: 1.1rem;
  margin: 2.25rem 0 0.75rem;
  padding: 0.4rem 0.75rem;
  background: var(--bg-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 4px 4px 0;
  line-height: 1.5;
}

main h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.5rem;
  color: var(--accent);
}

main p {
  margin-bottom: 0.75rem;
}

main ol,
main ul {
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

main li {
  margin-bottom: 0.35rem;
}

main li > ul,
main li > ol {
  margin-top: 0.35rem;
  margin-bottom: 0;
}

.table-wrap {
  overflow-x: auto;
  margin-bottom: 0.75rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9rem;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  text-align: left;
  white-space: nowrap;
}

th {
  background: var(--bg-soft);
}

td:nth-child(2) {
  white-space: normal;
  min-width: 12em;
}

.contact-box {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-top: 0.75rem;
}

.contact-box ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

a {
  color: var(--accent);
}

footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem 2.5rem;
  background: var(--bg-soft);
}

footer.site-footer .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--text-sub);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

footer.site-footer a {
  color: var(--text-sub);
}

/* ---- LP (index) ---- */

.hero {
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--bg) 100%);
  text-align: center;
  padding: 4rem 1.25rem 3rem;
}

.hero h1 {
  font-size: 2.2rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.hero p.tagline {
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.hero p.status {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.4rem 1.2rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.9rem;
}

.features {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  display: grid;
  gap: 1rem;
}

@media (min-width: 600px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
}

.feature h2 {
  all: unset;
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.feature p {
  font-size: 0.9rem;
  color: var(--text-sub);
  margin-bottom: 0;
}