/* 土台：文字・ボタン・ヘッダー・フッター・固定バー */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: "Inter", "Noto Sans JP", system-ui, sans-serif;
  font-size: 16px; line-height: 1.8; font-feature-settings: "palt" 1;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--primary); }
h1, h2, h3 { line-height: 1.45; margin: 0; }
p { margin: 0; }
.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 800px; }
.center { text-align: center; }
.sp { display: none; }
.empty { color: var(--text-sub); }

/* ボタン */
.btn {
  display: inline-flex; flex-direction: row; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: 2px; padding: 14px 28px; border-radius: 999px; font-weight: 700; text-decoration: none;
  border: 2px solid transparent; cursor: pointer; font-size: 16px; line-height: 1.3; transition: .2s;
  font-family: inherit;
}
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 18px 36px; font-size: 17px; }
.btn-block { width: 100%; }
.btn-sub { font-size: 12px; font-weight: 500; opacity: .9; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-accent { background: linear-gradient(135deg, var(--cta-from), var(--cta-to)); color: #fff; box-shadow: 0 6px 16px var(--cta-shadow); }
.btn-accent:hover { filter: brightness(1.05); transform: translateY(-1px); }
.btn-accent::after, .btn-cta-main::after { content: "›"; display: inline-grid; place-items: center; width: 22px; height: 22px; margin-left: 10px; border-radius: 50%; background: rgba(255,255,255,.22); font-size: 16px; line-height: 1; }
.btn-outline { background: #fff; color: var(--primary-dark); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-soft); }
.btn-ghost { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover { background: var(--primary-soft); }

/* ヘッダー */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--border); backdrop-filter: blur(6px); }
.header-inner { display: flex; align-items: center; gap: 28px; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.logo-mark { width: 34px; height: 34px; }
.logo-text { font-weight: 700; font-size: 19px; letter-spacing: .02em; }
.gnav { display: flex; gap: 24px; margin-left: auto; }
.gnav a { color: var(--ink); text-decoration: none; font-size: 14px; font-weight: 500; }
.gnav a:hover { color: var(--primary); }
.header-cta { display: flex; gap: 10px; }
.menu-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; }

/* フッター */
.site-footer { background: var(--ink); color: #fff; padding: 56px 0 24px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand p { margin-top: 12px; font-size: 14px; color: #fff; }
.logo-invert { color: #fff; }
.footer-h { font-weight: 700; font-size: 14px; margin-bottom: 10px; color: #fff; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 6px 0; }
.site-footer a { color: #fff; text-decoration: none; font-size: 14px; }
.site-footer a:hover { text-decoration: underline; }
.footer-bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.2); color: #fff; }

/* 画面下の固定バー */
.fixed-bar {
  position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%); z-index: 60;
  display: flex; align-items: center; gap: 16px; padding: 10px 12px 10px 22px;
  background: var(--primary-dark); color: #fff; border-radius: 999px; box-shadow: var(--shadow);
  width: max-content; max-width: calc(100% - 24px);
}
.fixed-bar[hidden] { display: none; }
.fixed-bar-text { font-size: 14px; font-weight: 500; color: #fff; }
.fixed-bar-close { background: none; border: 0; color: #fff; font-size: 18px; cursor: pointer; padding: 4px 8px; }

@media (max-width: 860px) {
  .gnav, .header-cta { display: none; }
  .menu-toggle { display: block; margin-left: auto; }
  .site-header.is-open .gnav {
    display: flex; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; padding: 16px 24px 24px; gap: 16px; border-bottom: 1px solid var(--border);
  }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .sp { display: inline; }
  .fixed-bar-text { display: none; }
  .fixed-bar { padding: 8px 8px 8px 8px; }
}