/* 共通ヘッダー（online/frontend/shell の partials/header.html 用スタイル）。
   全specの_layout.htmlから共通で読み込む（各specでの重複定義を避けるため）。 */

.site-header {
  position: relative;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.header-logo {
  font-family: var(--font-reading);
  font-size: 20px;
  font-weight: bold;
  color: var(--color-primary);
  text-decoration: none;
  cursor: pointer;
}
.header-nav { display: flex; gap: 24px; }
.header-nav a { color: var(--color-text-primary); text-decoration: none; font-size: 14px; cursor: pointer; }
.header-nav a:hover { color: var(--color-primary); }
.header-right { display: flex; align-items: center; gap: 12px; }
.header-login-btn {
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
}
.header-account {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text-primary);
  text-decoration: none;
}
.header-account-icon {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}
.header-hamburger { display: none; background: none; border: none; font-size: 22px; cursor: pointer; }
.header-nav.nav-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 60px;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
  gap: 16px;
  z-index: 10;
}

@media (max-width: 640px) {
  .header-nav { display: none; }
  .header-hamburger { display: block; }
}