/* === KEW ブランド変数 ===================================================
   メイン: #eb6210 (オレンジ)
   リンク: #028951 (グリーン)
   ベース: #f7f7ea / テキスト: #393633
======================================================================== */
:root {
  --kew-orange: #eb6210;
  --kew-orange-dark: #c44e08;
  --kew-orange-soft: #fde9d8;
  --kew-green: #4baa7f;
  --kew-green-dark: #028951;
  --kew-green-soft: #c3f3db;
  --kew-base: #f7f7ea;
  --kew-base-2: #eeeede;
  --kew-ink: #393633;
  --kew-ink-soft: #6a6660;
  --kew-line: #d8d6c5;
  --kew-cream: #fdfdf3;
  --kew-deep: #2a2722;
  --font-kokoro: 'Kokoro', 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  --font-jp: 'Noto Sans JP', -apple-system, 'Hiragino Sans', sans-serif;
  --font-en: 'Inter', 'Noto Sans JP', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-jp);
  background: var(--kew-base);
  color: var(--kew-ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}

img { display: block; max-width: 100%; }
a { color: var(--kew-green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; padding: 0; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; padding: 0; }

.kokoro { font-family: var(--font-kokoro); font-weight: 400; }
.heading-orange { color: var(--kew-orange); }
.lead-en {
  font-family: var(--font-en);
  font-weight: 600;
  letter-spacing: 0.2rem;
  text-transform: uppercase;
  font-size: 2em;
  color: var(--kew-green-dark);
}
.lead-en.muted { color: var(--kew-ink-soft); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  line-height: 1.25;
  border-radius: 999px;
  cursor: pointer;
  border: 0;
  font-family: var(--font-jp);
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.88; text-decoration: none; }

.btn-sm  { padding: 8px 16px; font-size: 0.8rem}
.btn-md  { padding: 11px 22px; font-size: 1rem;}
.btn-lg  { padding: 15px 30px; font-size: 1rem;}

.btn-primary { background: var(--kew-orange); color: #fff; box-shadow: 0 2px 0 var(--kew-orange-dark); }
.btn-outline  { background: #fff; color: var(--kew-ink); border: 1.5px solid var(--kew-line); }
.btn-white    { background: #fff; color: var(--kew-orange-dark); }

.section    { padding: 80px 56px; }
.section-sm { padding: 60px 56px; }

.card-white {
  background: #fff;
  border: 1px solid var(--kew-line);
  border-radius: 16px;
  padding: 28px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 56px;
  border-bottom: 1px solid var(--kew-line);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  font-family: var(--font-jp);
  color: var(--kew-ink);
  /* body 側の line-height / letter-spacing / font-weight に依存しないよう明示 */
  line-height: 1.5;
  letter-spacing: 0;
  font-weight: 400;
}
.site-header > a { flex-shrink: 0; }
.site-header > a img { height: 28px; width: auto; }
.site-header nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 13px;
  font-weight: 600;
}
.site-header nav a { color: var(--kew-ink); text-decoration: none; white-space: nowrap; }
.site-header nav a.active { color: var(--kew-orange); }
.site-header nav a:hover { color: var(--kew-orange); text-decoration: none; }

/* ── 2行ナビリンク（header-dropdown.js が生成） ── */
.site-header nav a.nav-link {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.15;
  gap: 2px;
  padding: 2px 0;
}
.site-header nav a.nav-link .nav-ja {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.site-header nav a.nav-link .nav-en {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--kew-ink-soft);
}
.site-header nav a.nav-link:hover .nav-en,
.site-header nav a.nav-link.active .nav-en {
  color: var(--kew-orange);
}
.site-header nav a.btn-primary,
.site-header nav a.btn-primary:hover { color: #fff; }
/* header-dropdown.js が生成するボタンは `.btn.btn-primary.btn-sm.nav-contact`、
   旧マークアップでは `.btn-contact`。両方を同じ見た目に揃える。 */
.site-header nav a.btn-contact,
.site-header nav a.nav-contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  border-radius: 999px;
  font-family: var(--font-jp);
  padding: 8px 16px;
  font-size: 0.8rem;
  background: var(--kew-orange); /* #eb6210 */
  color: #fff;
  box-shadow: 0 2px 0 var(--kew-orange-dark); /* #c44e08 */
  transition: background 0.15s, box-shadow 0.15s;
  border: 0; /* bootstrap .btn-primary の border をリセット */
}
.site-header nav a.btn-contact:hover,
.site-header nav a.nav-contact:hover,
.site-header nav a.btn-contact:focus,
.site-header nav a.nav-contact:focus {
  background: #ffb385;
  box-shadow: 0 2px 0 #ef7227;
  color: #fff;
  text-decoration: none;
  border-color: transparent; /* bootstrap の border-color を抑止 */
}

/* ── ハンバーガーボタン（モバイル時のみ表示） ── */
.site-header-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 40px; height: 40px;
  padding: 0;
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
}
.site-header-toggle-bar {
  display: block;
  position: absolute;
  left: 50%;
  width: 22px; height: 2px;
  background: var(--kew-ink);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: transform 0.2s, opacity 0.2s, top 0.2s;
}
.site-header-toggle-bar:nth-child(1) { top: 13px; }
.site-header-toggle-bar:nth-child(2) { top: 19px; }
.site-header-toggle-bar:nth-child(3) { top: 25px; }
.site-header.menu-open .site-header-toggle-bar:nth-child(1) {
  top: 19px; transform: translateX(-50%) rotate(45deg);
}
.site-header.menu-open .site-header-toggle-bar:nth-child(2) { opacity: 0; }
.site-header.menu-open .site-header-toggle-bar:nth-child(3) {
  top: 19px; transform: translateX(-50%) rotate(-45deg);
}

/* ── Nav dropdown (header-dropdown.js が生成) ── */
.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.nav-dropdown-trigger { cursor: pointer; }
/* href="#" 由来のフォーカスリングをマウスでは消し、キーボード操作時のみ表示 */
.nav-dropdown-trigger:focus { outline: none; }
.nav-dropdown-trigger:focus-visible {
  outline: 2px solid var(--kew-orange);
  outline-offset: 3px;
  border-radius: 4px;
}
/* 現在ページがドロップダウン配下のときは、トリガー自体もオレンジ強調 */
.site-header nav a.nav-dropdown-trigger.active {
  color: var(--kew-orange);
  font-weight: 700;
}
.nav-dropdown-trigger::after {
  content: "";
  display: inline-block;
  width: 0; height: 0;
  margin-left: 6px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  vertical-align: middle;
  transition: transform 0.15s;
}
.nav-dropdown:hover .nav-dropdown-trigger::after,
.nav-dropdown.is-open .nav-dropdown-trigger::after {
  transform: rotate(180deg);
}
.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: #fff;
  border: 1px solid var(--kew-line);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  padding: 6px;
  min-width: 200px;
  display: none;
  z-index: 50;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-item {
  display: block;
  padding: 9px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--kew-ink);
  white-space: nowrap;
}
.nav-dropdown-item:hover {
  background: var(--kew-orange-soft);
  color: var(--kew-orange-dark);
  text-decoration: none;
}
.nav-dropdown-item.active {
  color: var(--kew-orange);
  font-weight: 700;
}
/* ホバー判定が外れる隙間を埋める */
.nav-dropdown::after {
  content: "";
  position: absolute;
  top: 100%; left: 0; right: 0;
  height: 8px;
}

/* モバイル：ヘッダー全体をハンバーガー化 */
@media (max-width: 1080px) {
  .site-header-toggle { display: block; }

  /* ナビは初期非表示。menu-open 時にパネルとして展開 */
  .site-header nav {
    display: none !important;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0 10px;
    border-top: 1px solid var(--kew-line);
    border-bottom: 1px solid var(--kew-line);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    font-size: 0.95rem;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    z-index: 99;
  }
  .site-header.menu-open nav { display: flex !important; }
  .site-header nav > a {
    display: block;
    padding: 14px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  }
  /* モバイルパネル内では2行リンクを左寄せに */
  .site-header nav a.nav-link {
    display: flex;
    align-items: flex-start;
    gap: 1px;
  }
  .site-header nav a.nav-link .nav-ja { font-size: 1rem; }
  .site-header nav a.nav-link .nav-en { font-size: 10px; }
  /* お問い合わせボタンを非表示にする既存ルールを上書きしてパネル内に表示 */
  .site-header nav a.btn-contact {
    display: inline-flex !important;
    margin: 14px 20px 6px;
    justify-content: center;
    border-bottom: 0;
  }

  /* AI for Science：トリガーは見出しに、子項目はインラインで常時表示 */
  .nav-dropdown {
    display: block;
    width: 100%;
    position: static;
  }
  .nav-dropdown-trigger {
    pointer-events: none;
    color: var(--kew-ink-soft);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 700;
    padding: 14px 20px 4px;
    border-bottom: 0;
  }
  .nav-dropdown-trigger::after { display: none; }
  .nav-dropdown-menu {
    position: static !important;
    display: block !important;
    transform: none;
    box-shadow: none;
    border: 0;
    padding: 0;
    background: transparent;
    min-width: 0;
    max-width: none;
  }
  .nav-dropdown-item {
    display: block;
    padding: 12px 20px 12px 32px;
    font-size: 0.92rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  }
}

/* ── Responsive (サイト全体) ── */
@media (max-width: 1100px) {
  .focus-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .works-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }
  .work-main { grid-row: span 1; height: 280px; }
}
@media (max-width: 1080px) {
  .site-header nav .btn,
  .site-header nav a.btn-contact { display: none; }
  .site-header nav { gap: 20px; font-size: 1rem; }
}
@media (min-width: 769px) and (max-width: 1000px) {
  .cta-band { padding-bottom: 110px; }
  .cta-chara { display: block; width: 90px; right: 24px; bottom: 16px; top: auto; transform: none; }
}
@media (max-width: 900px) {
  .section, .section-sm { padding: 60px 24px; }
}
@media (max-width: 1080px) {
  .site-header {
    padding: 10px 16px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
  }
  .site-header > a { padding-bottom: 0; }
  .site-header > a img { height: 22px; }
  /* デスクトップ向けの「お問い合わせボタンを隠す」ルールはハンバーガー側で上書き済み */
  .hero { padding:10px 20px 48px; }
  .hero-h1 { font-size: 30px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .hero-stat { border-right: none; padding-right: 0; text-align: left; padding-left: 0; }
  .trust-bar, .ai-section, .cta-band, .site-footer { padding-left: 20px; padding-right: 20px; }
  .section, .section-sm { padding: 56px 20px; }
  .works-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .work-main { height: 260px; }
  .principles-grid { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; gap: 32px; align-items: flex-start; }
  .cta-title { font-size: 1.5rem; }
  .cta-chara { width: 72px; right: 16px; bottom: 16px; top: auto; transform: none; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
  .hero-chara { display: none; }
  .hero-content { margin-left: 0; text-align: left; }
}
@media (max-width: 600px) {
  .section, .section-sm { padding: 48px 16px; }
}

@media (max-width: 767px) {
  #page.page-list { padding: 1rem 1rem; }
  #page .main .area-scroll .sec-piece p{ margin-bottom: 2em; }
}

@media only screen and (max-width: 767px) {
    #page .main .area-lead h1 {
        font-size: 1.5rem;
    }
}

/* お問い合わせページ：料金目安リンク */
.contact-pricing-link {
  margin-top: 0.5em;
}
.contact-pricing-link a {
  color: var(--kew-green-dark);
  text-decoration: none;
}
.contact-pricing-link a:hover {
  text-decoration: underline;
}

/* Works 業種フィルターバー */
.works-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}
.works-filter-btn {
  padding: 6px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--kew-line);
  background: #fff;
  color: var(--kew-ink);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-jp);
  transition: border-color 0.15s, background 0.15s, color 0.15s;
  outline: none;
}
.works-filter-btn:hover {
  border-color: var(--kew-orange);
  color: var(--kew-orange);
}
.works-filter-btn:focus { outline: none; }
/* キーボード操作時のみフォーカスリングを表示（クリック時は出さない） */
.works-filter-btn:focus-visible {
  outline: 2px solid var(--kew-orange);
  outline-offset: 2px;
}
.works-filter-btn.active {
  background: var(--kew-orange);
  border-color: var(--kew-orange);
  color: #fff;
}
.img-works li.is-hidden,
.sec-piece.is-hidden { display: none; }

/* ===== 共通 CTA バンド ===== */
.cta-band {
  padding: 50px 56px;
  background: var(--kew-orange);
  color: #fff;
  text-align: center;
}
.cta-title {
  font-family: var(--font-Kokoro);
  font-size: 26px;
  font-weight: 400;
  margin-bottom: 18px;
}

/* ===== 共通フッター ===== */
.site-footer {
  padding: 40px 56px;
  background: var(--kew-deep);
  color: #999;
  font-size: 1rem;
}
.site-footer .footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.site-footer .footer-nav {
  display: flex;
  gap: 20px;
}
.site-footer .footer-nav a { color: #999; text-decoration: none; }
.site-footer .footer-nav a:hover { color: #ccc; text-decoration: none; }
@media (max-width: 768px) {
  .site-footer { padding-left: 20px; padding-right: 20px; }
  .site-footer .footer-inner { flex-direction: column; gap: 12px; align-items: flex-start; }
}