/* header.css：ヘッダー＋ナビ＋検索＋オーバーレイ（共通・修正版） */

/* styles.css に --primary が無い場合でも色が崩れないように、ここでデフォルトを用意 */
:root {
  --primary: #2f855a; /* index.html の theme-color と揃える */
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;

  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--maxw);
  margin-inline: auto;

  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;

  padding: 10px clamp(14px, 2vw, 22px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.logo-img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.brand-text {
  display: grid;
  line-height: 1.15;
}

.brand-title {
  font-family: "Shippori Mincho", serif;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--fg);
}

.brand-sub,
.brand-sub2 {
  font-size: 12px;
  color: var(--muted);
}

/* 右側：検索＆ボタン */
.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.search-input {
  width: clamp(140px, 24vw, 260px);
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--fg);
  outline: none;
}

.search-input::placeholder {
  color: color-mix(in oklab, var(--muted) 75%, transparent);
}

.search-input:focus {
  border-color: color-mix(in oklab, var(--primary) 65%, var(--border));
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--primary) 20%, transparent);
}

/* ★ここが主修正：ビロード/暗色系の残骸を排除して、公式サイト配色に統一 */
.search-btn {
  padding: 9px 12px;
  border: 1px solid color-mix(in oklab, var(--primary) 60%, var(--border));
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
}

.search-btn:hover {
  filter: brightness(1.05);
}

/* モバイル用トグル（PCは非表示） */
.nav-toggle {
  display: none;
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg);
  padding: 8px 10px;
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle .bars {
  display: inline-block;
  inline-size: 18px;
  block-size: 2px;
  background: currentColor;
  box-shadow: 0 6px 0 0 currentColor, 0 12px 0 0 currentColor;
}

/* ナビ */
.primary-nav {
  justify-self: center;
  display: flex;
}

.nav-list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-list a {
  display: inline-block;
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 14px;
  color: var(--fg);
  text-decoration: none;
}

.nav-list a:hover {
  background: color-mix(in oklab, var(--primary) 10%, transparent);
}

.nav-list a.is-current {
  background: color-mix(in oklab, var(--primary) 14%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--primary) 22%, var(--border));
}

/* 検索結果オーバーレイ（ID維持） */
#searchOverlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.62);
  z-index: 9999;
  overflow-y: auto;
}

#searchResults {
  background: #fff;
  color: #111;
  margin: 5% auto;
  padding: 18px;
  width: min(86%, 620px);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

#closeBtn {
  float: right;
  cursor: pointer;
  background: #ef4444;
  color: #fff;
  border: none;
  padding: 6px 10px;
  border-radius: 8px;
}

@media (prefers-color-scheme: dark) {
  #searchResults {
    background: #111827;
    color: #e5e7eb;
  }
}

/* レスポンシブ：タブレット */
@media (max-width: 920px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    position: absolute;
    inset-inline: 16px;
    top: 74px;
    border: 1px solid var(--border);
    background: var(--bg);
    border-radius: 14px;
    box-shadow: var(--shadow);
    display: none;
  }

  .primary-nav.open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    padding: 10px;
    gap: 2px;
    align-items: stretch;
  }

  .nav-list a {
    padding: 10px 12px;
  }
}

/* レスポンシブ：スマホ */
@media (max-width: 600px) {
  .header-inner {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-block: 12px;
  }

  .brand {
    justify-content: center;
  }

  .logo-img {
    width: 48px;
    height: 48px;
  }

  .brand-title {
    font-size: 17px;
  }

  .header-actions {
    justify-self: stretch;
    width: 100%;
  }

  .search-input {
    width: 100%;
    flex: 1 1 auto;
  }

  .search-btn {
    white-space: nowrap;
  }

  .primary-nav {
    top: 132px;
    inset-inline: 12px;
  }
}