/* =========================================
   walkand — トップカバー（Cover C: 二面）
   フロントページ専用。1画面のカバーに差し替え。
   - 左: テキストロゴ / 右: グレーパネル+縦書きタグライン
   - 粒子集合コピー演出（cover.jsが描画）
   - モバイルはハンバーガー（cover.jsが注入）
   ========================================= */

/* ── フロントページでは既存のヘッダー/フッターを出さない ── */
.home .wk-header,
.home #wk-header,
.home .wk-mobile-nav,
.home .wk-footer {
  display: none !important;
}
.home {
  background: #fff !important;
}

/* ── ベース ── */
.wkc {
  --wkc-black: #000;
  --wkc-pale: #f4f4f2;
  --wkc-line: #e3e3e0;
  --wkc-gothic: "Yu Gothic", "Yu Gothic Medium", "游ゴシック Medium", YuGothic, "游ゴシック体", "Noto Sans JP", "メイリオ", sans-serif;
  --wkc-en: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --wkc-ease: cubic-bezier(0.77, 0, 0.175, 1);
  position: relative;
  font-family: var(--wkc-gothic);
  font-weight: 300;
  color: var(--wkc-black);
  opacity: 1;
  transition: opacity 0.45s ease;
}
body.wkc-leaving .wkc { opacity: 0; }

.wkc p, .wkc a, .wkc li, .wkc span, .wkc div {
  font-family: var(--wkc-gothic) !important;
}
.wkc .wkc-en, .wkc .wkc-en * {
  font-family: var(--wkc-en) !important;
}

/* ── Loading（線を渡る点） ── */
.wkc-loading {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 1s ease;
}
.wkc-loading.is-out { opacity: 0; pointer-events: none; }
.wkc-loaderline {
  position: relative;
  width: 140px;
  height: 1px;
  background: #d9d9d9;
}
.wkc-loaderline::after {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--wkc-black);
  animation: wkcLoaderWalk 1.4s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}
@keyframes wkcLoaderWalk {
  0% { left: 0; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { left: calc(100% - 5px); opacity: 0; }
}

/* ── ヘッダー（ミニマル） ── */
.wkc-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 28px 30px 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  opacity: 0;
  transition: opacity 0.5s ease;
}
body.wkc-in .wkc-header { opacity: 1; }

.wkc-copy {
  position: relative;
  text-align: left;
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.08em;
  line-height: 1.9;
  color: var(--wkc-black);
}
.wkc-copy canvas { display: block; }

.wkc-nav ul {
  display: flex;
  gap: 26px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
}
.wkc-nav a {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--wkc-black) !important;
  text-decoration: none !important;
  transition: opacity 0.15s ease-out;
}
.wkc-nav a:hover { opacity: 0.4; }
.wkc-nav .wkc-navcontact {
  border: 1px solid var(--wkc-black);
  padding: 7px 22px 7px 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
  display: inline-flex;
  align-items: center;
}
.wkc-nav .wkc-navcontact span {
  display: inline-block;
  padding-left: 14px;
  position: relative;
}
.wkc-nav .wkc-navcontact span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  translate: 0 -50%;
  width: 9px;
  height: 1px;
  background: var(--wkc-black);
  transition: all 0.15s ease-out;
}
.wkc-nav .wkc-navcontact:hover span::before { left: 3px; }

/* ── Cover本体（二面スプリット） ── */
.wkc-cover {
  position: relative;
  width: 100%;
  height: 100svh;
  min-height: 560px;
  overflow: hidden;
  background: #fff;
}
.wkc-panel {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 36vw;
  background: var(--wkc-pale);
  border-left: 1px solid var(--wkc-line);
  transform: translateX(100%);
  transition: transform 1.3s var(--wkc-ease) 0.2s;
}
body.wkc-in .wkc-panel { transform: translateX(0); }

.wkc-lockup {
  position: absolute;
  left: 7vw;
  top: 50%;
  transform: translateY(-50%);
  width: min(40vw, 460px);
  margin: 0;
  opacity: 0;
  transition: opacity 1.2s ease 0.9s;
}
body.wkc-in .wkc-lockup { opacity: 1; }
.wkc-lockup img { width: 100%; height: auto; display: block; }

.wkc-tagline {
  position: absolute;
  right: 18vw;
  top: 50%;
  translate: 50% -50%;
  writing-mode: vertical-rl;
  font-size: 16px;
  font-weight: 300;
  letter-spacing: 0.5em;
  color: var(--wkc-black);
  margin: 0;
  opacity: 0;
  transition: opacity 1.4s ease 1.3s;
}
body.wkc-in .wkc-tagline { opacity: 1; }

.wkc-est {
  position: absolute;
  right: 30px;
  top: 50%;
  translate: 0 -50%;
  writing-mode: vertical-rl;
  font-size: 10px;
  letter-spacing: 0.3em;
  color: #b5b5b0;
  margin: 0;
  opacity: 0;
  transition: opacity 1.4s ease 1.9s;
}
body.wkc-in .wkc-est { opacity: 1; }

.wkc-copyright {
  position: absolute;
  left: 30px;
  bottom: 24px;
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.12em;
  color: var(--wkc-black);
  margin: 0;
  opacity: 0;
  transition: opacity 0.5s ease;
}
body.wkc-in .wkc-copyright { opacity: 1; }

/* ── ハンバーガー + 全画面メニュー（cover.jsが注入） ── */
.wkc-menubtn {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 260;
  width: 44px;
  height: 44px;
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}
.wkc-menubtn span {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 1px;
  background: #000;
  transition: transform 0.4s var(--wkc-ease), top 0.4s ease;
}
.wkc-menubtn span:nth-child(1) { top: 18px; }
.wkc-menubtn span:nth-child(2) { top: 26px; }
body.wkc-menu-open .wkc-menubtn span:nth-child(1) { top: 22px; transform: rotate(45deg); }
body.wkc-menu-open .wkc-menubtn span:nth-child(2) { top: 22px; transform: rotate(-45deg); }

.wkc-menu {
  position: fixed;
  inset: 0;
  z-index: 250;
  background: rgba(255, 255, 255, 0.98);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s;
}
body.wkc-menu-open .wkc-menu { opacity: 1; visibility: visible; }
.wkc-menu nav a {
  display: block;
  font-family: var(--wkc-en) !important;
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 0.32em;
  margin-left: 0.32em;
  color: #000 !important;
  text-decoration: none !important;
  padding: 16px 0;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
body.wkc-menu-open .wkc-menu nav a { opacity: 1; transform: translateY(0); }
body.wkc-menu-open .wkc-menu nav a:nth-child(1) { transition-delay: 0.10s; }
body.wkc-menu-open .wkc-menu nav a:nth-child(2) { transition-delay: 0.16s; }
body.wkc-menu-open .wkc-menu nav a:nth-child(3) { transition-delay: 0.22s; }
body.wkc-menu-open .wkc-menu nav a:nth-child(4) { transition-delay: 0.28s; }
body.wkc-menu-open .wkc-menu nav a:nth-child(5) { transition-delay: 0.34s; }
.wkc-menu nav a.wkc-menu-contact {
  display: inline-block;
  margin-top: 28px;
  padding: 10px 40px;
  border: 1px solid #000;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .wkc-header { padding: 16px 20px 0; }
  .wkc-copy { font-size: 9px; max-width: calc(100vw - 80px); }
  .wkc-nav { display: none; }
  .wkc-menubtn { display: block; }

  .wkc-panel {
    width: 100%;
    top: auto;
    height: 34%;
    border-left: none;
    border-top: 1px solid var(--wkc-line);
    transform: translateY(100%);
  }
  body.wkc-in .wkc-panel { transform: translateY(0); }

  .wkc-lockup {
    width: min(68vw, 320px);
    left: 8vw;
    top: 32%;
  }
  .wkc-tagline {
    writing-mode: horizontal-tb;
    translate: none;
    right: auto;
    left: 8vw;
    top: auto;
    bottom: 22%;
    font-size: 12px;
    letter-spacing: 0.3em;
  }
  .wkc-est { display: none; }
  .wkc-copyright { left: 20px; bottom: 18px; }
}