/* SMPROのWebページの共通の見た目(2026-11-11)。App Storeの画像と同じ「明るいグレイの撮影スタジオ」。
   字はSan Francisco(Appleの端末)。トップだけの見た目は home.css */
:root {
  --paper: #e8e8eb;
  --paper-hi: #f5f5f7;
  --ink: #1d1d1f;
  --mute: #515154;
  --soft: #86868b;
  --line: rgba(0, 0, 0, 0.1);
  --red: #e02a2a;
  --wrap: 1180px;
  --gutter: max(24px, 5vw);
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Hiragino Sans",
          "Apple SD Gothic Neo", "PingFang SC", "PingFang TC", "Noto Sans", Arial, sans-serif;
  color-scheme: light;
}
:lang(ko) { --sans: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif; }
:lang(zh-Hans) { --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", sans-serif; }
:lang(zh-Hant) { --sans: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", sans-serif; }
:lang(ja) { --sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif; }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.wrap { width: min(var(--wrap), 100% - 2 * var(--gutter)); margin: 0 auto; }

/* ヘッダー(すりガラス) */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(240, 240, 243, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(18px); backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 20px; height: 56px; }
.brand { flex-shrink: 0; display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; font-size: 19px; letter-spacing: -0.01em; }
.brand img { border-radius: 22%; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18); }
.site-nav { margin-left: auto; display: flex; gap: 22px; }
.site-nav a { text-decoration: none; color: var(--mute); font-size: 15px; white-space: nowrap; }
.site-nav a:hover, .site-nav a[aria-current] { color: var(--ink); }
@media (max-width: 560px) { .site-nav { gap: 14px; } .site-nav a { font-size: 14px; } .brand span { display: none; } }
@media (max-width: 400px) { .header-inner { gap: 12px; } .site-nav { gap: 10px; } .site-nav a { font-size: 13px; } }
@media (max-width: 345px) { .header-inner { gap: 8px; } .site-nav { gap: 6px; } .site-nav a { font-size: 12px; } .brand img { width: 30px; height: 30px; } }

/* 言語(地球のアイコンを押すと一覧) */
.lang { position: relative; }
.lang summary { list-style: none; cursor: pointer; color: var(--mute); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; }
.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover { color: var(--ink); background: rgba(0, 0, 0, 0.05); }
.lang nav {
  position: absolute; right: 0; top: 42px; background: rgba(255, 255, 255, 0.96); border-radius: 14px; padding: 6px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18), 0 0 0 1px var(--line); min-width: 170px; display: grid;
}
.lang nav a { text-decoration: none; padding: 9px 14px; border-radius: 9px; color: var(--mute); font-size: 15px; }
.lang nav a:hover { background: rgba(0, 0, 0, 0.05); color: var(--ink); }
.lang nav a[aria-current] { color: var(--ink); font-weight: 600; }

/* ボタン */
.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 14px 26px; border-radius: 999px;
  font-weight: 600; font-size: 17px; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, background .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--ink); color: #fff; box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22); }
.btn-primary:hover { box-shadow: 0 16px 36px rgba(0, 0, 0, 0.28); }
.btn-ghost { color: var(--ink); background: rgba(255, 255, 255, 0.7); box-shadow: 0 0 0 1.5px rgba(0, 0, 0, 0.14); }
.btn-ghost:hover { background: #fff; }
.btn .apple { width: 20px; height: 20px; fill: currentColor; margin-top: -3px; }

/* フッター */
.site-footer { background: #1d1d1f; color: #a1a1a6; padding: 44px 0 52px; position: relative; z-index: 2; }
.footer-inner { display: grid; gap: 18px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #f5f5f7; font-weight: 700; }
.footer-brand img { border-radius: 22%; }
.brand picture, .footer-brand picture { display: block; flex: none; }   /* 端末一覧のライト・ダークで替えるアイコン(contentsにすると<source>が項目に数えられ、間の分だけ右へずれた) */
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px 24px; }
.footer-nav a { color: #a1a1a6; text-decoration: none; font-size: 14px; }
.footer-nav a:hover { color: #f5f5f7; }
.footer-note { margin: 0; font-size: 13px; color: #6e6e73; }