/* サイトヘッダー */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  max-width: 1360px;
  margin: 0 auto;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  flex: none;
  text-decoration: none;
}
.brand__logo {
  flex: none;
  width: auto;
  height: 36px;
  display: block;
}
.brand--header {
  align-items: center;
  gap: 0;
}
.brand--header .brand__tag {
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid #d5e0f0;
  font-size: 10.5px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  line-height: 1;
  white-space: nowrap;
}
.brand__tag {
  font-size: 11px;
  color: var(--color-text-muted);
  font-weight: 600;
  white-space: nowrap;
}
.brand--footer .brand__logo { height: 34px; }
.brand--admin {
  display: flex;
  padding: 0 8px 18px;
}
.brand--admin .brand__logo { height: 28px; }
.brand--auth {
  flex-direction: row;
  justify-content: center;
}
.brand--auth .brand__logo { height: 44px; }
.auth-brand {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.global-nav { margin-left: auto; }
.global-nav ul { display: flex; align-items: center; gap: 4px; }
.global-nav a {
  display: inline-block;
  padding: 8px 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-text);
  border-radius: 6px;
}
.global-nav a:hover { color: var(--color-primary); opacity: 1; }
.global-nav li + li::before { content: "・"; color: #b9c6dd; font-size: 11px; }
.global-nav li { display: flex; align-items: center; }

.header-actions { display: flex; align-items: center; gap: 12px; }
.header-actions .btn-login {
  display: inline-flex; align-items: center; gap: 6px;
  min-height: 40px; padding: 6px 18px;
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-pill);
  color: var(--color-primary);
  font-size: 13.5px; font-weight: 700;
}
.header-actions .btn-register {
  display: inline-flex; align-items: center;
  min-height: 40px; padding: 6px 18px;
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  color: #fff;
  font-size: 13.5px; font-weight: 700;
  box-shadow: 0 4px 14px rgba(0, 153, 204, .3);
}

/* ハンバーガー（SPのみ表示） */
.menu-toggle {
  display: none;
  width: 44px; height: 44px;
  margin-left: auto;
  position: relative;
  z-index: 130;
}
.menu-toggle span {
  display: block; width: 22px; height: 2px; background: var(--color-text);
  margin: 5px auto; transition: transform .25s, opacity .25s;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(6, 40, 95, .5);
  z-index: 110;
}
body.nav-open .nav-overlay { display: block; }
body.nav-open { overflow: hidden; }

/* SPドロワーは基本非表示（1023px以下でのみ responsive.css が表示制御する） */
.sp-drawer { display: none; }