/* ==========================================================================
   86研究所 v3 デザインシステム
   白基調・チャコールの文字とボタン・ロゴの青をアクセント
   英字の大見出し（Figtree）＋日本語ラベル・角丸カード・ピル型ボタン
   style.css の後に読み込み、全ページの見た目を上書きする
   ========================================================================== */
:root {
  --k-ink: #333333;
  --k-ink-2: #555b66;
  --k-mute: #888c94;
  --k-dark: #373737;
  --k-blue: #0050a0;
  --k-blue-2: #1a6fc4;
  --k-sky: #d6ebfb;
  --k-orange: #e8730c;
  --k-bg-cool: #f2f5f9;
  --k-bg-warm: #f5f3f2;
  --k-bg-gray: #f6f6f6;
  --k-line: #e3e5e8;
  --k-radius: 12px;
  --k-shadow: 0 4px 24px rgba(0, 0, 0, .06);
  --k-shadow-lg: 0 18px 48px rgba(0, 0, 0, .10);
  --k-en: 'Figtree', 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --k-ja: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --k-header-top: 12px;
  --k-header-h: 64px;
  --k-offset: calc(var(--k-header-top) + var(--k-header-h) + 32px);

  /* 旧テーマ変数をv3配色にマッピング */
  --color-primary: var(--k-ink);
  --color-primary-dark: #222;
  --color-secondary: var(--k-blue);
  --color-accent: var(--k-blue);
  --color-text: var(--k-ink);
  --color-text-secondary: var(--k-ink-2);
  --color-bg-light: var(--k-bg-cool);
  --color-bg-dark: var(--k-dark);
  --color-border: var(--k-line);
  --font-ja: var(--k-ja);
  --font-en: var(--k-en);
  --font-serif: var(--k-ja);
  --header-height: var(--k-offset);
}

html { scroll-padding-top: 96px; }
body {
  font-family: var(--k-ja);
  color: var(--k-ink);
  background: #fff;
  line-height: 1.8;
  letter-spacing: .02em;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "palt" 1;
}
h1, h2, h3, h4, h5, h6 { font-family: var(--k-ja); color: var(--k-ink); letter-spacing: .03em; }
a:hover { color: var(--k-blue); }
::selection { background: var(--k-sky); }

/* 旧テーマの明朝見出しを全てゴシック太字へ */
[style*="font-serif"], .section-title, .page-title, .entry-title { font-family: var(--k-ja) !important; font-weight: 700 !important; }

/* 本文域 */
.site-main { margin-top: var(--k-offset); }
body.home .site-main, body.k-full-hero .site-main { margin-top: 0; }
.container { max-width: 1280px; padding: 0 40px; }

/* ==========================================================================
   ボタン（ピル型）
   ========================================================================== */
.k-btn, .btn-primary, .btn-secondary, .btn-outline {
  display: inline-flex; align-items: center; justify-content: center; gap: 14px;
  min-height: 52px; padding: 0 34px; border-radius: 999px;
  font-family: var(--k-ja); font-size: 15px; font-weight: 700; letter-spacing: .04em;
  text-decoration: none !important; line-height: 1.3; cursor: pointer;
  transition: background .2s, color .2s, box-shadow .2s, transform .2s, border-color .2s;
  border: 1.5px solid transparent;
}
.k-btn svg { flex-shrink: 0; transition: transform .2s; }
.k-btn:hover svg { transform: translateX(3px); }
.k-btn.is-dark, .btn-primary { background: var(--k-dark); color: #fff !important; }
.k-btn.is-dark:hover, .btn-primary:hover { background: #111; color: #fff !important; }
.k-btn.is-outline, .btn-outline, .btn-secondary { background: #fff; color: var(--k-ink) !important; border-color: var(--k-ink); }
.k-btn.is-outline:hover, .btn-outline:hover, .btn-secondary:hover { background: var(--k-ink); color: #fff !important; }
.k-btn.is-white { background: #fff; color: var(--k-ink) !important; }
.k-btn.is-white:hover { background: var(--k-sky); }
.k-btn.is-glass { background: rgba(255,255,255,.06); color: #fff !important; border-color: rgba(255,255,255,.7); }
.k-btn.is-glass:hover { background: rgba(255,255,255,.16); }
.k-btn.is-sm { min-height: 40px; padding: 0 20px; font-size: 13.5px; gap: 8px; }
.k-btn.is-lg { min-height: 60px; padding: 0 42px; font-size: 16px; }
.k-btn.is-wide { min-width: 220px; }

.k-arrow { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 50%; background: var(--k-dark); color: #fff; flex-shrink: 0; transition: transform .2s, background .2s; }
.k-arrow.is-line { background: transparent; border: 1.5px solid currentColor; color: inherit; }
.k-arrow.is-sm { width: 26px; height: 26px; }

/* ==========================================================================
   セクション共通
   ========================================================================== */
.k-wrap { max-width: 1280px; margin: 0 auto; padding: 0 40px; }
.k-sec { padding: 128px 0; position: relative; }
.k-sec.is-cool { background: var(--k-bg-cool); }
.k-sec.is-warm { background: var(--k-bg-warm); }
.k-sec.is-gray { background: var(--k-bg-gray); }
.k-label { font-size: 15px; color: var(--k-mute); margin: 0 0 6px; letter-spacing: .06em; font-weight: 400; }
.k-display { font-family: var(--k-en); font-weight: 600; font-size: clamp(56px, 8vw, 104px); line-height: 1; letter-spacing: -.01em; color: var(--k-ink); margin: 0; }
.k-display.is-white { color: #fff; }
h2.k-display { font-size: clamp(56px, 8vw, 104px) !important; line-height: 1 !important; }
@media (max-width: 600px) { h2.k-display { font-size: clamp(46px, 14vw, 60px) !important; } }
.k-sub-en { font-family: var(--k-en); font-weight: 600; font-size: 15px; letter-spacing: .04em; margin: 6px 0 0; }
.k-sub-en.is-blue { color: var(--k-blue); }
.k-sub-en.is-orange { color: var(--k-orange); }

/* ==========================================================================
   ヘッダー（浮いた角丸カード）
   ========================================================================== */
#masthead.k-header {
  position: fixed; top: var(--k-header-top); left: 12px; right: 12px; width: auto; z-index: 1000;
  background: #fff; border-radius: 10px; box-shadow: 0 2px 18px rgba(0,0,0,.08);
  transform: none !important; transition: box-shadow .3s;
}
.admin-bar #masthead.k-header { top: calc(var(--k-header-top) + 32px); }
#masthead.k-header.is-scrolled { box-shadow: 0 6px 28px rgba(0,0,0,.12); }
.k-header-inner { height: var(--k-header-h); display: flex; align-items: center; gap: 24px; padding: 0 14px 0 22px; }
.k-logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none !important; flex-shrink: 0; }
.k-logo img { height: 34px !important; width: auto !important; max-width: none !important; display: block; }
.k-logo-text { font-family: var(--k-ja); font-weight: 700; font-size: 19px; color: var(--k-blue); letter-spacing: .12em; white-space: nowrap; }
.k-nav { margin-left: auto; display: flex; align-items: center; }
.k-nav .main-menu { display: flex; gap: 2px; }
.k-nav .main-menu > li > a { height: auto; line-height: 1.4; padding: 10px 12px; font-size: 14px; font-weight: 700; color: var(--k-ink); }
.k-nav .main-menu > li > a::after { display: none; }
.k-header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.k-nav { min-width: 0; }
.k-nav .main-menu { flex-wrap: nowrap; }
.k-nav .main-menu > li > a { white-space: nowrap; }
#masthead.k-header.is-compact .k-nav { display: none; }
#masthead.k-header.is-compact .k-header-actions { margin-left: auto; }
.k-header-actions .k-btn { min-height: 42px; padding: 0 22px; font-size: 13.5px; }
.k-icon-btn { width: 44px; height: 44px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: var(--k-ink); background: transparent; border: 0; cursor: pointer; transition: background .2s; }
.k-icon-btn:hover { background: var(--k-bg-gray); }
.k-burger { width: 22px; height: 14px; position: relative; display: block; }
.k-burger::before, .k-burger::after, .k-burger span { content: ""; position: absolute; left: 0; width: 100%; height: 2px; background: currentColor; border-radius: 2px; }
.k-burger::before { top: 0; } .k-burger span { top: 6px; } .k-burger::after { top: 12px; }

/* 全画面メニュー */
.mobile-menu-overlay.k-drawer {
  background: #fff; color: var(--k-ink); z-index: 100000;
  transform: translateY(-12px); opacity: 0; visibility: hidden; transition: opacity .3s, transform .3s, visibility 0s linear .3s;
}
.mobile-menu-overlay.k-drawer.is-open { transform: none; opacity: 1; visibility: visible; transition: opacity .3s, transform .3s; }
.k-drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 20px 34px; border-bottom: 1px solid var(--k-line); }
.k-drawer-body { max-width: 1200px; margin: 0 auto; padding: 56px 40px 80px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.k-drawer-col h3 { font-size: 17px; font-weight: 700; margin: 0 0 18px; padding-bottom: 12px; border-bottom: 1px solid var(--k-line); }
.k-drawer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.mobile-menu-overlay.k-drawer a:not(.k-btn) { color: var(--k-ink) !important; border: 0 !important; padding: 6px 0 !important; font-size: 14.5px !important; font-weight: 500 !important; display: inline-block !important; }
.mobile-menu-overlay.k-drawer a:not(.k-btn):hover { color: var(--k-blue) !important; }
.admin-bar .mobile-menu-overlay.k-drawer { top: 32px; }
@media (max-width: 782px) { .admin-bar .mobile-menu-overlay.k-drawer { top: 46px; } }
.k-drawer-cta { grid-column: 1 / -1; display: flex; gap: 12px; flex-wrap: wrap; padding-top: 24px; border-top: 1px solid var(--k-line); }
.mobile-menu-overlay.k-drawer .k-drawer-cta a.k-btn { padding: 0 30px !important; font-size: 15px !important; font-weight: 700 !important; display: inline-flex !important; }
.mobile-menu-overlay.k-drawer .k-drawer-cta a.k-btn.is-dark { color: #fff !important; }
.mobile-menu-overlay.k-drawer .k-drawer-cta a.k-btn.is-dark:hover { color: #fff !important; }
.mobile-menu-close.k-icon-btn { margin: 0; color: var(--k-ink); width: 44px; height: 44px; }

/* 検索 */
.search-overlay { background: rgba(255,255,255,.98); }
.search-overlay-form { border-bottom-color: var(--k-ink); }
.search-overlay-form input { color: var(--k-ink); }
.search-overlay-form input::placeholder { color: var(--k-mute); }
.search-overlay-form button, .search-overlay-close { color: var(--k-ink); }

/* ==========================================================================
   フッター
   ========================================================================== */
.k-contact { position: relative; color: #fff; background: #2b2f36 center/cover no-repeat; overflow: hidden; }
.k-contact::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(20,24,30,.82), rgba(20,24,30,.55)); }
.k-contact .k-wrap { position: relative; display: grid; grid-template-columns: 1fr 1.5fr; gap: 48px; align-items: center; padding-top: 112px; padding-bottom: 112px; }
.k-contact .k-label { color: rgba(255,255,255,.8); }
.k-contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.k-contact-btn { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 104px; padding: 0 28px 0 40px; border: 1.5px solid rgba(255,255,255,.75); border-radius: var(--k-radius); color: #fff !important; text-decoration: none !important; font-size: 17px; font-weight: 700; letter-spacing: .06em; background: rgba(255,255,255,.04); backdrop-filter: blur(2px); transition: background .2s, transform .2s; }
.k-contact-btn:hover { background: rgba(255,255,255,.14); transform: translateY(-2px); }
.k-contact-btn small { display: block; font-size: 12px; font-weight: 400; opacity: .75; margin-top: 4px; letter-spacing: .02em; }
.k-contact-btn .k-arrow { background: transparent; border: 1.5px solid #fff; width: 40px; height: 40px; }

.k-footer { background: #fff; padding: 72px 0 0; font-size: 13.5px; }
.k-footer-top { display: grid; grid-template-columns: 1.2fr 3fr; gap: 56px; padding-bottom: 56px; }
.k-footer-brand img { width: 108px; height: auto; display: block; margin-bottom: 20px; }
.k-footer-brand p { margin: 0; color: var(--k-ink-2); font-size: 13px; line-height: 1.9; }
.k-footer-sns { display: flex; gap: 8px; margin-top: 20px; }
.k-footer-sns a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--k-line); display: inline-flex; align-items: center; justify-content: center; color: var(--k-ink); }
.k-footer-sns a:hover { border-color: var(--k-ink); }
.k-footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.k-footer-col h3 { font-size: 15px; font-weight: 700; margin: 0 0 14px; }
.k-footer-col h4 { font-size: 12px; font-weight: 700; color: var(--k-mute); margin: 26px 0 10px; letter-spacing: .06em; }
.k-footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.k-footer-col a { color: var(--k-ink); text-decoration: none; }
.k-footer-col a:hover { color: var(--k-blue); }
.k-footer-col .k-footer-strong { display: grid; gap: 12px; margin-top: 22px; }
.k-footer-col .k-footer-strong a { font-size: 15px; font-weight: 700; }
.k-footer-bottom { border-top: 1px solid var(--k-line); padding: 24px 0 32px; display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; color: var(--k-mute); font-size: 12px; }
.k-footer-bottom nav { display: flex; gap: 22px; flex-wrap: wrap; }
.k-footer-bottom a { color: var(--k-ink-2); text-decoration: none; }

/* ==========================================================================
   旧テーマ要素の調整（下層ページ）
   ========================================================================== */
.entry-content h2 { font-size: clamp(22px, 2.6vw, 28px); font-weight: 700; border-left: 0 !important; padding: 0 0 14px !important; border-bottom: 2px solid var(--k-ink); margin: 56px 0 24px; }
.entry-content h3 { font-size: 20px; font-weight: 700; margin: 40px 0 16px; padding-left: 14px; border-left: 4px solid var(--k-blue); }
.entry-content a { color: var(--k-blue); text-decoration: underline; text-underline-offset: 3px; }
.entry-content table th { background: var(--k-bg-cool); }
.news-category, .card-category { background: var(--k-sky) !important; color: var(--k-ink) !important; border-radius: 999px !important; }
.knowledge-card, .card { border-radius: var(--k-radius) !important; overflow: hidden; }
input[type="text"], input[type="email"], input[type="tel"], input[type="url"], textarea, select { border-radius: 8px; }

/* SNSアイコン群 */
.lab86-sns-links a { border-radius: 50%; }

/* ==========================================================================
   レスポンシブ
   ========================================================================== */
@media (max-width: 1180px) {
  .k-nav { display: none; }
  .k-header-actions { margin-left: auto; }
}
@media (max-width: 900px) {
  :root { --k-header-top: 8px; --k-header-h: 58px; }
  .container, .k-wrap { padding: 0 20px; }
  .k-sec { padding: 88px 0; }
  #masthead.k-header { left: 8px; right: 8px; }
  .k-header-inner { padding: 0 8px 0 14px; gap: 10px; }
  .k-logo img { height: 28px !important; }
  .k-logo-text { font-size: 16px; }
  .k-header-actions .k-btn.is-outline { display: none; }
  .k-header-actions .k-btn { min-height: 38px; padding: 0 16px; font-size: 12.5px; }
  .k-drawer-body { grid-template-columns: 1fr 1fr; padding: 32px 20px 56px; gap: 28px; }
  .k-drawer-head { padding: 12px 16px; }
  .k-contact .k-wrap { grid-template-columns: 1fr; padding-top: 80px; padding-bottom: 80px; gap: 32px; }
  .k-footer-top { grid-template-columns: 1fr; gap: 40px; }
  .k-footer-cols { grid-template-columns: 1fr 1fr; gap: 32px 20px; }
}
@media (max-width: 600px) {
  .container, .k-wrap { padding: 0 16px; }
  .k-sec { padding: 72px 0; }
  .k-display { font-size: clamp(48px, 15vw, 64px); }
  .k-logo-text { display: none; }
  .k-drawer-body { grid-template-columns: 1fr; }
  .k-contact-grid { grid-template-columns: 1fr; gap: 12px; }
  .k-contact-btn { min-height: 76px; padding: 0 18px 0 24px; font-size: 15.5px; }
  .k-btn { min-height: 50px; padding: 0 26px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}