/* ================================================================
   NK-Studio — Main Stylesheet
   White × Blue — Minimal Creative Agency
================================================================ */

/* ----------------------------------------------------------------
   CSS Custom Properties
---------------------------------------------------------------- */
:root {
  /* — Color palette (white base) — */
  --nk-bg:        #ffffff;
  --nk-bg-2:      #f5f5f8;
  --nk-bg-3:      #ececf2;
  --nk-bg-card:   #fafafa;
  --nk-text:      #0c0c14;
  --nk-text-sub:  #3a3a52;
  --nk-text-muted:#888898;
  --nk-gold:      #0284c7;   /* sky blue / azure アクセント */
  --nk-gold-lt:   #38bdf8;   /* 薄いブルー・アイコン用 */
  --nk-gold-dim:  rgba(2,132,199,.08);
  --nk-border:    #dddde8;
  --nk-border-lt: #eaeaf2;

  /* フッターは暗色でアクセント */
  --nk-footer-bg:   #0c0c14;
  --nk-footer-text: #f0f0f5;
  --nk-footer-muted:#6a6a80;
  --nk-footer-border:#1e1e2c;

  /* — Typography — */
  --font-en: 'Inter', sans-serif;
  --font-ja: 'Noto Sans JP', 'Inter', sans-serif;

  /* — Layout (PC幅を広げる) — */
  --hdr-h:        72px;
  --container-w:  1400px;
  --container-px: clamp(20px, 3.5vw, 56px);
  --section-py:   clamp(80px, 10vw, 140px);

  /* — Motion — */
  --ease:     cubic-bezier(.4,0,.2,1);
  --ease-out: cubic-bezier(0,0,.2,1);
}

/* ----------------------------------------------------------------
   Reset
---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; font-size: 16px; }
body  {
  background: var(--nk-bg);
  color: var(--nk-text);
  font-family: var(--font-ja);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a   { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul  { list-style: none; }

/* ----------------------------------------------------------------
   Utilities
---------------------------------------------------------------- */
.nk-container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--container-px);
}
.nk-section {
  padding: var(--section-py) 0;
}

.nk-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--nk-gold);
  margin-bottom: 18px;
}

.nk-heading {
  font-size: clamp(32px, 4.2vw, 60px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.03em;
  color: var(--nk-text);
}
.nk-subheading {
  font-size: clamp(13px, 1.3vw, 15px);
  color: var(--nk-text-muted);
  margin-top: 16px;
  line-height: 1.95;
}

/* ----------------------------------------------------------------
   Scroll-reveal
---------------------------------------------------------------- */
.nk-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .65s var(--ease-out), transform .65s var(--ease-out);
}
.nk-reveal.is-visible { opacity: 1; transform: translateY(0); }
.nk-reveal[data-delay="1"] { transition-delay: .08s; }
.nk-reveal[data-delay="2"] { transition-delay: .16s; }
.nk-reveal[data-delay="3"] { transition-delay: .24s; }
.nk-reveal[data-delay="4"] { transition-delay: .32s; }
.nk-reveal[data-delay="5"] { transition-delay: .40s; }
.nk-reveal[data-delay="6"] { transition-delay: .48s; }

/* ----------------------------------------------------------------
   Buttons
---------------------------------------------------------------- */
.nk-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  border-radius: 2px;
  border: none;
  cursor: pointer;
  transition: background .3s var(--ease), color .3s, transform .3s, box-shadow .3s;
}
.nk-btn svg { width: 14px; height: 14px; flex-shrink: 0; transition: transform .3s; }
.nk-btn:hover svg { transform: translateX(4px); }

.nk-btn--primary {
  background: var(--nk-gold);
  color: #fff;
}
.nk-btn--primary:hover {
  background: #0369a1;
  transform: translateY(-2px);
  box-shadow: 0 10px 36px rgba(2,132,199,.3);
}

.nk-btn--outline {
  background: transparent;
  color: var(--nk-text-sub);
  border: 1.5px solid var(--nk-border);
}
.nk-btn--outline:hover {
  border-color: var(--nk-gold);
  color: var(--nk-gold);
  transform: translateY(-2px);
}

/* ================================================================
   HEADER
================================================================ */
.nk-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--hdr-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background .4s var(--ease), border-color .4s, box-shadow .4s;
  border-bottom: 1px solid transparent;
}
.nk-header.is-scrolled {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--nk-border);
  box-shadow: 0 1px 24px rgba(12,12,20,.06);
}
.nk-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Logo */
.nk-logo {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -.05em;
  color: var(--nk-text);
  transition: color .3s;
}
.nk-logo em { color: var(--nk-gold); font-style: normal; }
.nk-logo:hover { color: var(--nk-gold); }

/* Desktop nav */
.nk-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nk-nav a {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--nk-text-muted);
  position: relative;
  transition: color .3s;
}
.nk-nav a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1.5px;
  background: var(--nk-gold);
  transition: width .3s var(--ease);
}
.nk-nav a:hover            { color: var(--nk-text); }
.nk-nav a:hover::after     { width: 100%; }
.nk-nav__cta {
  border: 1.5px solid var(--nk-gold) !important;
  padding: 9px 20px;
  border-radius: 2px;
  color: var(--nk-gold) !important;
  transition: background .3s, color .3s !important;
}
.nk-nav__cta::after { display: none !important; }
.nk-nav__cta:hover  { background: var(--nk-gold) !important; color: #fff !important; }

/* ヘッダー — スクロール前はロゴだけ白（ナビは右側の白背景上なので暗色のまま） */
.nk-header:not(.is-scrolled) .nk-logo {
  color: #ffffff;
  text-shadow: 0 1px 8px rgba(0,0,0,.25);
}
.nk-header:not(.is-scrolled) .nk-logo em {
  color: var(--nk-gold-lt);
}

/* Hamburger */
.nk-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}
.nk-hamburger span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--nk-text);
  transition: all .3s var(--ease);
}
.nk-hamburger.is-active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nk-hamburger.is-active span:nth-child(2) { opacity: 0; }
.nk-hamburger.is-active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile menu overlay — ドラマチックに暗色のまま */
.nk-mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--nk-footer-bg);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  transform: translateX(100%);
  transition: transform .5s var(--ease);
}
.nk-mobile-menu.is-open { transform: translateX(0); }
.nk-mobile-menu a {
  font-size: clamp(28px, 7vw, 48px);
  font-weight: 800;
  letter-spacing: -.03em;
  color: var(--nk-footer-muted);
  transition: color .3s;
}
.nk-mobile-menu a:hover { color: var(--nk-gold-lt); }

/* ================================================================
   HERO
================================================================ */
.nk-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--hdr-h);
  background: var(--nk-bg);
}

/* 薄いグリッドライン（白背景用） */
.nk-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--nk-border-lt) 1px, transparent 1px),
    linear-gradient(to bottom, var(--nk-border-lt) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: .7;
  pointer-events: none;
}

/* 右上からの淡いブルーグラデーション */
.nk-hero__glow {
  position: absolute;
  top: -15%; right: -10%;
  width: min(800px, 100vw);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(2,132,199,.10) 0%, transparent 65%);
  pointer-events: none;
}

/* .nk-hero__inner のレイアウトはストリップセクションで定義 */

.nk-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp .9s var(--ease-out) .2s forwards;
}
.nk-hero__eyebrow::before {
  content: '';
  display: block;
  width: 36px; height: 1.5px;
  background: var(--nk-gold);
}
.nk-hero__eyebrow span {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--nk-gold);
}

.nk-hero__title {
  font-size: clamp(44px, 7vw, 100px);
  font-weight: 900;
  line-height: 1.0;
  letter-spacing: -.04em;
  margin-bottom: 28px;
  white-space: nowrap;   /* "NK-Studio" を1行に固定 */
  opacity: 0;
  animation: fadeUp .9s var(--ease-out) .4s forwards;
}
.nk-hero__title .en {
  display: block;
  color: var(--nk-text);
}
.nk-hero__title .ja {
  display: block;
  font-size: .33em;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--nk-text-muted);
  margin-top: 14px;
  line-height: 1.5;
}

.nk-hero__desc {
  font-size: clamp(13px, 1.3vw, 16px);
  color: var(--nk-text-muted);
  max-width: 500px;
  line-height: 1.95;
  margin-bottom: 44px;
  opacity: 0;
  animation: fadeUp .9s var(--ease-out) .6s forwards;
}

.nk-hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp .9s var(--ease-out) .8s forwards;
}

/* ----------------------------------------------------------------
   Hero strips — 斜め画像ストリップ2本
   clip-path: polygon() でストリップ形状を作る
   角度の計算: 上端から下端にかけて X が -38% シフト（Studio.inc参考）
---------------------------------------------------------------- */
.nk-hero__strips {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* 共通ストリップ */
.nk-hero__strip {
  position: absolute;
  inset: 0;
}
.nk-hero__strip-inner {
  position: absolute;
  inset: 0;
}

/*
  Strip 1（左側・やや太め）
  上から下へ clip-path が伸びるアニメーション
*/
.nk-hero__strip--1 {
  clip-path: polygon(0% 0%, 26% 0%, -12% 100%, -38% 100%);
  animation: stripGrow1 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}
.nk-hero__strip--1 .nk-hero__strip-inner {
  background: url('http://xs299536.xsrv.jp/wp-content/themes/arkhe-child/assets/img/hero.webp')
              30% center / cover no-repeat;
}

/*
  Strip 2（中央やや右・細め・少し透過でレイヤー感）
  Strip1 より少し遅らせてスタッガー
*/
.nk-hero__strip--2 {
  clip-path: polygon(30% 0%, 46% 0%, 8% 100%, -8% 100%);
  animation: stripGrow2 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
}
.nk-hero__strip--2 .nk-hero__strip-inner {
  background: url('http://xs299536.xsrv.jp/wp-content/themes/arkhe-child/assets/img/hero.webp')
              70% center / cover no-repeat;
}

/* テキストエリアのフェード — 68% コンテンツ幅に合わせて調整 */
.nk-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    transparent          24%,
    rgba(255,255,255,.6) 36%,
    rgba(255,255,255,1)  46%
  );
  z-index: 1;
  pointer-events: none;
}

/* テキストは右寄せ（幅を広げて折り返しを解消） */
.nk-hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 80px 0 100px;
}
.nk-hero__content {
  width: 68%;
}

/* タブレット以下: ストリップを薄くしてテキストを全幅に */
@media (max-width: 900px) {
  .nk-hero__strips  { opacity: .18; }
  .nk-hero__inner   { justify-content: flex-start; }
  .nk-hero__content { width: 100%; }
  .nk-hero__title   { white-space: normal; }
  .nk-hero::after   { background: rgba(255,255,255,.88); }
}

/* Scroll indicator */
.nk-hero__scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeIn .9s var(--ease-out) 1.2s forwards;
}
.nk-hero__scroll span {
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--nk-text-muted);
}
.nk-scroll-line {
  width: 1px;
  height: 48px;
  background: var(--nk-gold);
  transform-origin: top;
  animation: pulse-line 2.2s ease-in-out infinite;
}

/* ================================================================
   SERVICES
================================================================ */
.nk-services {
  background: var(--nk-bg-2);
  border-top: 1px solid var(--nk-border);
}

.nk-services__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.nk-services__head .nk-subheading { max-width: 320px; text-align: right; }

.nk-services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--nk-border);
  border: 1px solid var(--nk-border);
}

.nk-service-card {
  background: var(--nk-bg);
  padding: 40px 32px;
  position: relative;
  overflow: hidden;
  transition: background .35s var(--ease);
}
.nk-service-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--nk-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.nk-service-card:hover { background: var(--nk-gold-dim); }
.nk-service-card:hover::before { transform: scaleX(1); }

.nk-service-card__num {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--nk-gold);
  opacity: .7;
  margin-bottom: 20px;
}
.nk-service-card__icon {
  width: 44px; height: 44px;
  color: var(--nk-gold-lt);
  margin-bottom: 22px;
  transition: color .3s;
}
.nk-service-card:hover .nk-service-card__icon { color: var(--nk-gold); }

.nk-service-card__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--nk-text);
}
.nk-service-card__desc {
  font-size: 12.5px;
  color: var(--nk-text-muted);
  line-height: 1.9;
}

/* ================================================================
   SERVICES — 動画背景バリアント
================================================================ */
.nk-services--video {
  position: relative;
  background: #07090f;   /* 動画が読み込まれる前のフォールバック */
  border-top: none;
}

/* 動画ラップ */
.nk-svc-video-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}
.nk-svc-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .45;
  filter: grayscale(20%);
  will-change: transform; /* GPU描画 */
}
.nk-svc-video-overlay {
  position: absolute;
  inset: 0;
  /* 上部(ヘッダー側)は少し透明、下は濃くしてカードと馴染ませる */
  background: linear-gradient(
    to bottom,
    rgba(7,9,15,.72) 0%,
    rgba(7,9,15,.82) 60%,
    rgba(7,9,15,.9)  100%
  );
}

/* コンテンツを動画の上へ */
.nk-services--video > .nk-container {
  position: relative;
  z-index: 2;
}

/* テキスト色を白系に */
.nk-services--video .nk-label           { color: var(--nk-gold-lt); }
.nk-services--video .nk-heading         { color: #ffffff; }
.nk-services--video .nk-subheading      { color: rgba(255,255,255,.52); }

/* グリッドの隙間色 */
.nk-services--video .nk-services__grid {
  background: rgba(255,255,255,.07);
  border-color: rgba(255,255,255,.07);
}

/* カード：半透明ダーク＋バックドロップブラー */
.nk-services--video .nk-service-card {
  background: rgba(10,12,22,.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.nk-services--video .nk-service-card:hover {
  background: rgba(2,132,199,.14);
}
.nk-services--video .nk-service-card::before   { background: var(--nk-gold-lt); }
.nk-services--video .nk-service-card__num      { color: var(--nk-gold-lt); opacity: .8; }
.nk-services--video .nk-service-card__icon     { color: var(--nk-gold-lt); }
.nk-services--video .nk-service-card__title    { color: #ffffff; }
.nk-services--video .nk-service-card__desc     { color: rgba(255,255,255,.48); }

/* ================================================================
   ABOUT
================================================================ */
.nk-about {
  background: var(--nk-bg);
  border-top: 1px solid var(--nk-border);
}

.nk-about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(48px, 7vw, 110px);
  align-items: start;
}

.nk-about__heading {
  font-size: clamp(32px, 4.2vw, 56px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.03em;
  margin-bottom: 28px;
  color: var(--nk-text);
}
.nk-about__body {
  font-size: 14.5px;
  color: var(--nk-text-muted);
  line-height: 2.05;
  margin-bottom: 40px;
}

/* Company info list */
.nk-info-item {
  border-top: 1px solid var(--nk-border);
  padding: 22px 0;
}
.nk-info-item:last-child { border-bottom: 1px solid var(--nk-border); }
.nk-info-item__key {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--nk-gold);
  margin-bottom: 7px;
}
.nk-info-item__val {
  font-size: 14.5px;
  color: var(--nk-text-sub);
  line-height: 1.75;
}

/* Directors */
.nk-directors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 4px;
}
.nk-director {
  background: var(--nk-bg-2);
  border: 1px solid var(--nk-border);
  padding: 18px;
  border-radius: 3px;
  transition: border-color .3s, box-shadow .3s;
}
.nk-director:hover {
  border-color: var(--nk-gold-lt);
  box-shadow: 0 4px 20px rgba(2,132,199,.12);
}
.nk-director__av {
  width: 50px; height: 50px;
  background: var(--nk-gold-dim);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 18px;
  font-weight: 900;
  color: var(--nk-gold);
  margin-bottom: 12px;
  border: 1.5px solid rgba(160,120,40,.2);
}
.nk-director__name { font-size: 14px; font-weight: 700; letter-spacing: .02em; color: var(--nk-text); }
.nk-director__role { font-size: 10px; color: var(--nk-text-muted); letter-spacing: .08em; margin-top: 3px; }

/* ================================================================
   WORKS — ホバー動画プレビュー対応
================================================================ */
.nk-works {
  background: var(--nk-bg-2);
  border-top: 1px solid var(--nk-border);
}

.nk-works__head { margin-bottom: 56px; }

.nk-works__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 300px;
  gap: 2px;
  background: var(--nk-border);
}

/* カード本体 */
.nk-work-card {
  position: relative;
  overflow: hidden;
  background: var(--nk-bg-3);
  cursor: pointer;
}
.nk-work-card:first-child { grid-row: span 2; }

/* メディアエリア */
.nk-work-media {
  position: absolute;
  inset: 0;
}

/* サムネイル */
.nk-work-media__img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: opacity .5s var(--ease), transform .6s var(--ease);
  z-index: 1;
}
.nk-work-card:hover .nk-work-media__img {
  opacity: 0;
  transform: scale(1.03);
}

/* 動画プレビュー */
.nk-work-media__video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .5s var(--ease);
  z-index: 2;
}
.nk-work-card.has-video:hover .nk-work-media__video { opacity: 1; }

/* プレースホルダー（素材未セット時） */
.nk-work-media__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: clamp(48px, 6vw, 80px);
  font-weight: 900;
  letter-spacing: -.06em;
  color: var(--nk-border-lt);
  background: linear-gradient(135deg, var(--nk-bg-3) 0%, var(--nk-bg-2) 100%);
  transition: color .4s;
  user-select: none;
  z-index: 1;
}
.nk-work-card:hover .nk-work-media__placeholder { color: rgba(2,132,199,.25); }

/* ホバー時グラデーション */
.nk-work-media__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(12,12,20,.88) 0%, transparent 55%);
  opacity: 0;
  transition: opacity .4s var(--ease);
  z-index: 3;
}
.nk-work-card:hover .nk-work-media__overlay { opacity: 1; }

/* カード情報 */
.nk-work-info {
  position: absolute;
  inset: 0;
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  z-index: 4;
  transform: translateY(8px);
  opacity: 0;
  transition: opacity .4s var(--ease), transform .4s var(--ease);
}
.nk-work-card:hover .nk-work-info { opacity: 1; transform: translateY(0); }

.nk-work-info__num {
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--nk-gold-lt);
  margin-bottom: 4px;
}
.nk-work-info__cat {
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(255,255,255,.6);
  margin-bottom: 4px;
}
.nk-work-info__title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: #fff;
  line-height: 1.35;
}

/* 動画あり：再生アイコン */
.nk-work-info__play {
  position: absolute;
  top: 18px; right: 18px;
  width: 38px; height: 38px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  backdrop-filter: blur(4px);
  transition: background .3s;
}
.nk-work-info__play svg { width: 15px; height: 15px; margin-left: 2px; }
.nk-work-card:hover .nk-work-info__play { background: rgba(2,132,199,.55); }

/* ================================================================
   CONTACT CTA BANNER
================================================================ */
.nk-cta {
  background: var(--nk-bg);
  border-top: 1px solid var(--nk-border);
  text-align: center;
}
.nk-cta__heading {
  font-size: clamp(36px, 7vw, 88px);
  font-weight: 900;
  letter-spacing: -.04em;
  line-height: 1.05;
  margin-bottom: 20px;
  color: var(--nk-text);
}
.nk-cta__sub {
  font-size: 15px;
  color: var(--nk-text-muted);
  max-width: 440px;
  margin: 0 auto 48px;
  line-height: 1.95;
}
.nk-cta .nk-btn--primary { font-size: 13px; padding: 18px 44px; }

/* ================================================================
   FOOTER — ダーク（白ベースのアクセントとして）
================================================================ */
.nk-footer {
  background: var(--nk-footer-bg);
  border-top: 1px solid var(--nk-footer-border);
  padding: 72px 0 40px;
}
.nk-footer .nk-logo { color: var(--nk-footer-text); }
.nk-footer .nk-logo em { color: var(--nk-gold-lt); }
.nk-footer .nk-logo:hover { color: var(--nk-gold-lt); }

.nk-footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 56px;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

.nk-footer__brand .nk-logo { font-size: 26px; display: inline-block; margin-bottom: 18px; }
.nk-footer__tagline {
  font-size: 13px;
  color: var(--nk-footer-muted);
  max-width: 260px;
  line-height: 1.85;
}

.nk-footer__cols { display: flex; gap: 72px; flex-wrap: wrap; }
.nk-footer__col h4 {
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--nk-gold-lt);
  margin-bottom: 18px;
}
.nk-footer__col li + li { margin-top: 11px; }
.nk-footer__col a {
  font-size: 13px;
  color: var(--nk-footer-muted);
  transition: color .3s;
}
.nk-footer__col a:hover { color: var(--nk-footer-text); }

.nk-footer__bottom {
  border-top: 1px solid var(--nk-footer-border);
  padding-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.nk-footer__copy {
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--nk-footer-muted);
  letter-spacing: .04em;
}
.nk-footer__sns { display: flex; gap: 22px; }
.nk-footer__sns a {
  font-family: var(--font-en);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--nk-footer-muted);
  transition: color .3s;
}
.nk-footer__sns a:hover { color: var(--nk-gold-lt); }

/* ================================================================
   KEYFRAMES
================================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Strip 1: 上端の細線から帯が下方向に伸びる */
@keyframes stripGrow1 {
  from { clip-path: polygon(0% 0%, 26% 0%, 26% 0%, 0% 0%); }
  to   { clip-path: polygon(0% 0%, 26% 0%, -12% 100%, -38% 100%); }
}
/* Strip 2: 同じく上端から伸びる（位置だけ右にオフセット） */
@keyframes stripGrow2 {
  from { clip-path: polygon(30% 0%, 46% 0%, 46% 0%, 30% 0%); }
  to   { clip-path: polygon(30% 0%, 46% 0%, 8% 100%, -8% 100%); }
}

@keyframes pulse-line {
  0%, 100% { transform: scaleY(.25); opacity: .35; }
  50%       { transform: scaleY(1);   opacity: 1;   }
}

/* ================================================================
   RESPONSIVE
================================================================ */
@media (max-width: 1100px) {
  .nk-services__grid { grid-template-columns: repeat(2, 1fr); }
  .nk-works__grid    { grid-template-columns: repeat(2, 1fr); }
  .nk-works__grid .nk-work-card:first-child { grid-row: span 1; }
}

@media (max-width: 768px) {
  :root { --hdr-h: 60px; }

  .nk-nav       { display: none; }
  .nk-hamburger { display: flex; }

  .nk-about__inner   { grid-template-columns: 1fr; }
  .nk-services__grid { grid-template-columns: 1fr; }
  .nk-works__grid    { grid-template-columns: 1fr; grid-auto-rows: 240px; }
  .nk-services__head .nk-subheading { text-align: left; }

  .nk-footer__top   { flex-direction: column; }
  .nk-footer__cols  { gap: 36px; }
  .nk-footer__bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .nk-hero__title .ja { font-size: .32em; }
  .nk-directors { grid-template-columns: 1fr; }
  .nk-cta__heading { font-size: clamp(32px, 10vw, 56px); }
}