/* AI 経済為替辞典 — 公式サイト共通スタイル（アプリのトンマナ準拠）
   和紙地 #FAF8F3 / 明朝 NotoSerifJP / 朱の落款 #993C1D。
   ※左ボーダー着色カードは使わない（アプリ DESIGN 準拠）。 */
:root {
  --paper: #FAF8F3;
  --card: #FFFFFF;
  --surface: #F5F3EE;
  --ink: #1A1815;
  --ink2: #5F5C56;
  --ink3: #8E8B83;
  --rule: #D6D2C8;
  --seal: #993C1D;
  --info: #2C5DB0;
  --max: 880px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Hiragino Sans", sans-serif;
  line-height: 1.9;
}

a { color: var(--info); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ── ヘッダー / ナビ ── */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(250, 248, 243, 0.92);
  backdrop-filter: saturate(1.1) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 58px; gap: 16px;
}
.brand {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--ink); font-family: "Noto Serif JP", serif;
  font-weight: 700; font-size: 1.02rem; letter-spacing: 0.02em;
}
.brand .mark {
  display: inline-flex; width: 30px; height: 30px;
  align-items: center; justify-content: center;
  border: 1.5px solid var(--seal); border-radius: 7px;
  color: var(--seal); font-family: "Noto Serif JP", serif; font-size: 1rem;
}
.site-nav ul { list-style: none; display: flex; gap: 18px; margin: 0; padding: 0; }
.site-nav a { color: var(--ink2); font-size: 0.86rem; }
.site-nav a[aria-current="page"] { color: var(--seal); font-weight: 600; }
@media (max-width: 600px) {
  .site-nav { display: none; }
}

/* ── 文書ページ（terms / privacy / support） ── */
.wrap { max-width: 720px; margin: 0 auto; padding: 36px 20px 80px; }

.seal {
  display: inline-flex; width: 46px; height: 46px;
  align-items: center; justify-content: center;
  border: 2px solid var(--seal); border-radius: 10px;
  color: var(--seal); font-family: "Noto Serif JP", serif;
  font-size: 1.5rem; font-weight: 600; margin-bottom: 12px;
}
header.doc {
  border-bottom: 2px solid var(--seal);
  padding-bottom: 16px; margin-bottom: 28px;
}
h1 {
  font-family: "Noto Serif JP", serif; font-weight: 700;
  font-size: 1.7rem; margin: 0; letter-spacing: 0.01em;
}
.appname { color: var(--seal); font-family: "Noto Serif JP", serif; font-weight: 600; }
.updated { color: var(--ink3); font-size: 0.8rem; margin-top: 8px; }
h2 {
  font-family: "Noto Serif JP", serif; font-weight: 600;
  font-size: 1.18rem; margin: 34px 0 10px; color: var(--ink);
}
h3 { font-family: "Noto Serif JP", serif; font-weight: 600; font-size: 1.02rem; margin: 22px 0 6px; }
p, li { font-size: 0.96rem; color: var(--ink); }
ul { padding-left: 1.25em; margin: 8px 0; }
li { margin: 4px 0; }
.lead {
  font-family: "Noto Serif JP", serif; font-size: 1.05rem;
  color: var(--ink2); line-height: 1.95;
}
.note {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: 12px; padding: 16px 18px; margin: 18px 0;
  color: var(--ink2); font-size: 0.9rem;
}
dl.qa { margin: 8px 0; }
dl.qa dt { font-family: "Noto Serif JP", serif; font-weight: 600; margin-top: 18px; color: var(--ink); }
dl.qa dd { margin: 6px 0 0; color: var(--ink2); }

/* ── CTA ── */
.cta {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 8px; background: var(--seal); color: #fff !important;
  padding: 13px 26px; border-radius: 10px; font-weight: 600;
  font-family: "Noto Serif JP", serif; transition: opacity .15s ease;
}
.cta:hover { opacity: .9; text-decoration: none; }
.cta.ghost {
  background: transparent; color: var(--seal) !important;
  border: 1.5px solid var(--seal);
}

/* ── LP（index） ── */
.hero {
  text-align: center; padding: 64px 20px 52px;
  border-bottom: 1px solid var(--rule);
}
.hero .seal-lg {
  display: inline-flex; width: 96px; height: 96px;
  align-items: center; justify-content: center;
  border: 2px solid var(--seal); border-radius: 20px;
  color: var(--seal); font-family: "Noto Serif JP", serif;
  font-size: 3rem; background: var(--card); margin-bottom: 20px;
}
.hero h1 { font-size: 2rem; line-height: 1.35; margin: 0 auto; max-width: 16em; }
.hero .tagline {
  font-family: "Noto Serif JP", serif; color: var(--ink2);
  font-size: 1.06rem; margin: 14px auto 0; max-width: 24em; line-height: 1.85;
}
.hero .actions { margin-top: 26px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero .price-note { margin-top: 14px; color: var(--ink3); font-size: 0.8rem; }

.section { padding: 52px 0; border-bottom: 1px solid var(--rule); }
.section h2 { text-align: center; margin: 0 0 6px; }
.section .sub { text-align: center; color: var(--ink3); font-size: 0.86rem; margin: 0 0 30px; }

.feature-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.feature {
  background: var(--card); border: 1px solid var(--rule);
  border-radius: 14px; padding: 22px 20px;
}
.feature .fmark {
  display: inline-flex; width: 38px; height: 38px; margin-bottom: 12px;
  align-items: center; justify-content: center;
  border: 1.5px solid var(--seal); border-radius: 9px;
  color: var(--seal); font-family: "Noto Serif JP", serif; font-size: 1.15rem;
}
.feature h3 { margin: 0 0 6px; font-size: 1.05rem; }
.feature p { margin: 0; color: var(--ink2); font-size: 0.92rem; }

.steps { max-width: 620px; margin: 0 auto; counter-reset: step; }
.steps li {
  list-style: none; position: relative; padding: 14px 0 14px 52px;
  border-bottom: 1px dashed var(--rule); font-size: 0.96rem;
}
.steps li:last-child { border-bottom: none; }
.steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 12px;
  width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--seal); border-radius: 50%;
  color: var(--seal); font-family: "Noto Serif JP", serif; font-weight: 600;
}

.subscribe-box {
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: 16px; padding: 28px 24px; text-align: center; max-width: 560px; margin: 0 auto;
}
.subscribe-box .price { font-family: "Noto Serif JP", serif; font-size: 2rem; font-weight: 800; color: var(--ink); }
.subscribe-box .price small { font-size: 0.9rem; font-weight: 500; color: var(--ink3); }
.subscribe-box ul { display: inline-block; text-align: left; margin: 16px auto 0; }

.sister {
  display: flex; gap: 16px; align-items: center;
  background: var(--card); border: 1px solid var(--rule);
  border-radius: 14px; padding: 20px; max-width: 560px; margin: 0 auto;
}
.sister .smark {
  flex: 0 0 auto; width: 46px; height: 46px; display: flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--seal); border-radius: 10px; color: var(--seal);
  font-family: "Noto Serif JP", serif; font-size: 1.3rem;
}
.sister h3 { margin: 0 0 2px; font-size: 1rem; }
.sister p { margin: 0; color: var(--ink2); font-size: 0.88rem; }
.sister + .sister { margin-top: 14px; }
.sister .applinks { margin-top: 8px; font-size: 0.8rem; }

/* ── フッター ── */
.site-footer {
  background: var(--surface); padding: 30px 20px;
  color: var(--ink3); font-size: 0.8rem; text-align: center;
}
.site-footer nav { margin-bottom: 10px; }
.site-footer a { color: var(--ink2); margin: 0 8px; }

footer.doc {
  margin-top: 44px; border-top: 1px solid var(--rule);
  padding-top: 18px; color: var(--ink3); font-size: 0.8rem;
}
footer.doc a { color: var(--ink2); }