/* Invoice Mail Draft 公開ページ（静的・外部の読み込みなし・クッキー／計測なし） */
:root {
  --navy: #1b365d;
  --blue: #2f6db5;
  --ink: #1f2933;
  --muted: #52606d;
  --line: #d9e2ec;
  --bg: #f4f7fb;
  --card: #ffffff;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", Meiryo, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.85;
  font-size: 16px;
}
a { color: var(--blue); text-underline-offset: 2px; }
a:hover { color: var(--navy); }

.site-header { background: var(--navy); color: #fff; }
.site-header .inner { max-width: 880px; margin: 0 auto; padding: 22px 20px 20px; }
.site-header .company { font-size: 14px; letter-spacing: .04em; opacity: .9; margin: 0 0 6px; }
.site-header h1 { margin: 0; font-size: 26px; line-height: 1.35; font-weight: 700; }
.site-header h1 small { display: block; font-size: 15px; font-weight: 400; opacity: .9; margin-top: 4px; }

.site-nav { background: #fff; border-bottom: 1px solid var(--line); }
.site-nav .inner { max-width: 880px; margin: 0 auto; padding: 0 20px; display: flex; flex-wrap: wrap; gap: 4px 20px; }
.site-nav a { display: inline-block; padding: 12px 0; font-size: 14px; text-decoration: none; color: var(--muted); border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--navy); border-bottom-color: var(--navy); }

main { max-width: 880px; margin: 0 auto; padding: 28px 20px 12px; }
section.lang { margin-bottom: 40px; }
section.lang > h2.lang-title { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; font-weight: 600; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 22px 24px; margin: 0 0 16px; }
.card h3 { margin: 0 0 10px; font-size: 18px; color: var(--navy); line-height: 1.5; }
.card h3 .num { color: var(--blue); margin-right: 6px; }
.card p { margin: 0 0 12px; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
ul { padding-left: 1.3em; margin: 0 0 12px; }
li { margin: 4px 0; }
.lead { font-size: 17px; }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.two-col .box { border: 1px solid var(--line); border-radius: 6px; padding: 16px 18px; background: #fbfcfe; }
.two-col .box h4 { margin: 0 0 8px; font-size: 15px; }
.box.do h4 { color: #1d6b3a; }
.box.dont h4 { color: #a1262b; }
.box ul { margin: 0; }

.note { border-left: 4px solid var(--blue); background: #eef4fb; padding: 12px 16px; border-radius: 0 6px 6px 0; margin: 0 0 12px; }
table.info { width: 100%; border-collapse: collapse; font-size: 15px; }
table.info th, table.info td { text-align: left; vertical-align: top; padding: 9px 10px; border-top: 1px solid var(--line); }
table.info th { width: 11em; color: var(--muted); font-weight: 600; }
table.info tr:first-child th, table.info tr:first-child td { border-top: 0; }
code { background: #eef2f7; border-radius: 4px; padding: 1px 6px; font-size: .92em; word-break: break-all; }
.meta { color: var(--muted); font-size: 14px; }

.site-footer { border-top: 1px solid var(--line); background: #fff; margin-top: 24px; }
.site-footer .inner { max-width: 880px; margin: 0 auto; padding: 20px; font-size: 14px; color: var(--muted); }
.site-footer a { color: var(--muted); }

@media (max-width: 640px) {
  .two-col { grid-template-columns: 1fr; }
  .site-header h1 { font-size: 22px; }
  .card { padding: 18px 16px; }
  table.info th { width: 7.5em; }
}