:root {
  --ink: #17343c;
  --muted: #52686f;
  --line: #d7e3e6;
  --paper: #f3f6f5;
  --card: #ffffff;
  --sky: #2f95dc;
  --sky-soft: #e7f4fc;
  --pin: #ef5a3a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "PingFang TC", "Noto Sans JP", "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.75;
}

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

a:hover { color: #145f94; }

.wrap {
  width: min(40rem, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand img {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.55rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  margin-left: auto;
}

.nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav a[aria-current="page"] { color: var(--sky); font-weight: 700; }

@media (max-width: 40rem) {
  .nav { margin-left: 0; }
}

.lang {
  font-size: 0.95rem;
  text-decoration: none;
}

main { padding: 1.5rem 0 3rem; }

.hero {
  display: grid;
  justify-items: center;
  gap: 1rem;
  margin: 0.5rem 0 1.5rem;
  padding: 1.75rem 1rem 1.5rem;
  background:
    linear-gradient(180deg, #8fd0fb 0%, #4eacef 42%, #1f6f86 100%);
  border-radius: 1.25rem;
  color: white;
  text-align: center;
}

.hero img {
  width: 7.5rem;
  height: 7.5rem;
  border-radius: 1.6rem;
  box-shadow: 0 10px 24px rgba(12, 48, 64, 0.25);
}

.hero h1 {
  margin: 0;
  color: white;
  font-size: 1.55rem;
}

.hero p {
  margin: 0;
  max-width: 22rem;
  font-size: 1.05rem;
  line-height: 1.6;
}

h1 {
  margin: 0 0 0.4rem;
  font-size: 1.7rem;
  line-height: 1.35;
  letter-spacing: 0.01em;
}

.lede {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.cards {
  display: grid;
  gap: 0.75rem;
}

.card {
  display: block;
  padding: 1rem 1.05rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  color: inherit;
  text-decoration: none;
}

.card strong { display: block; font-size: 1.05rem; }

.card span { color: var(--muted); font-size: 0.95rem; }

article {
  padding: 0.25rem 0 0.5rem;
}

article h1 { margin-bottom: 1rem; }

article h2 {
  margin: 1.6rem 0 0.45rem;
  font-size: 1.15rem;
}

article p { margin: 0.7rem 0; }

article ul {
  margin: 0.4rem 0 0.8rem;
  padding-left: 1.2rem;
}

article li { margin: 0.35rem 0; }

article li::marker { color: var(--pin); }

.faq { display: grid; gap: 0.85rem; }

.faq section {
  padding: 0.9rem 1rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.9rem;
}

.faq h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.faq p { margin: 0; }

.contact {
  margin: 0 0 1.25rem;
  padding: 1rem 1.05rem;
  background: var(--sky-soft);
  border-radius: 0.9rem;
}

.contact p { margin: 0.25rem 0; }

.contact a { font-weight: 700; }

.eula {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer .wrap { padding: 1.25rem 0 2rem; }

.site-footer p { margin: 0.3rem 0; }

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