/* Resets & Core Variables */
:root {
  --c-bg: #050505;
  --c-text: #F4F4F5;
  --font-serif-en: 'Cormorant Garamond', serif;
  --font-serif-jp: 'Noto Serif JP', serif;
  --font-sans: 'Inter', 'Noto Sans JP', sans-serif;
  --font-heavy: 'Dela Gothic One', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; background-color: var(--c-bg); }
body {
  color: var(--c-text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }

/* =============================================
   Header — グローバルナビゲーション
   改善: mix-blend-mode廃止 → 半透明バックドロップ
   スクロール連動でヘッダー背景を強化
   ハンバーガーメニュー追加（スマホ）
   ============================================= */
.header-minimal {
  position: fixed;
  top: 0; left: 0; width: 100%;
  padding: 0 4vw;
  height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 9999;
  /* 半透明バックドロップ — 常に読みやすい */
  background: rgba(5, 5, 5, 0.55);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.4s ease, border-color 0.4s ease;
}

/* スクロール後: 背景をより不透明に */
.header-minimal.scrolled {
  background: rgba(5, 5, 5, 0.88);
  border-bottom-color: rgba(255, 255, 255, 0.15);
}

/* ロゴ */
.header-minimal .logo {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 1.35rem;
  letter-spacing: 0.05em;
  color: #fff;
  font-weight: 600;
  flex-shrink: 0;
  transition: opacity 0.3s ease;
}
.header-minimal .logo:hover { opacity: 0.7; }

/* PC ナビゲーション */
.header-minimal nav {
  display: flex;
  gap: 0;
  align-items: center;
}

.header-minimal nav a {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.9);
  padding: 0.5rem 1.2rem;
  position: relative;
  transition: color 0.3s ease;
}

/* ホバー下線アニメーション */
.header-minimal nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1.2rem;
  right: 1.2rem;
  height: 1px;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.header-minimal nav a:hover {
  color: #fff;
}
.header-minimal nav a:hover::after {
  transform: scaleX(1);
}

/* =============================================
   ハンバーガーボタン（スマホ専用）
   ============================================= */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  cursor: pointer;
  gap: 5px;
  background: none;
  border: none;
  padding: 0;
  z-index: 10001;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: #fff;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.25s ease;
  transform-origin: center;
}

/* ハンバーガー → ✕ 変形 */
.nav-hamburger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-hamburger.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-hamburger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* =============================================
   スマホ用 フルスクリーンドロワーメニュー
   ============================================= */
.nav-drawer {
  display: none; /* JSで制御 */
  position: fixed;
  inset: 0;
  z-index: 9998;
  background: rgba(5, 5, 5, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2.5rem;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.nav-drawer.is-open {
  display: flex;
  opacity: 1;
}

.nav-drawer a {
  font-family: var(--font-serif-en);
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 300;
  font-style: italic;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  transition: color 0.3s ease, transform 0.3s ease;
}

.nav-drawer a:hover {
  color: #fff;
  transform: translateX(8px);
}

/* =============================================
   Sticky Poster Layout
   ============================================= */
main {
  position: relative;
  background: var(--c-bg);
}

.poster-container {
  height: 200vh; /* gives us 100vh of scrolling distance past top */
  position: relative;
  z-index: 10;
}

.poster {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  padding: 0 5vw;
}

/* Backgrounds & Cropping */
.poster-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-size: cover;
  background-position: center;
  z-index: -2;
  /* subtle scale based on scroll progress */
  transform: scale(calc(1 + var(--scroll-progress, 0) * 0.15));
  filter: brightness(0.65);
  will-change: transform, clip-path;
}

.poster-overlay {
  position: absolute; inset: 0; z-index: -1;
  background: rgba(0,0,0,0.3);
}
.poster-overlay-gradient {
  position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(circle at center, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.8) 100%);
}
.dynamic-fade-overlay {
  opacity: calc(0.5 + var(--scroll-progress, 0) * 0.5);
}

.dynamic-crop {
  clip-path: inset(
    calc(var(--scroll-progress, 0) * 15%) 
    calc(var(--scroll-progress, 0) * 5%) 
    calc(var(--scroll-progress, 0) * 5%) 
    calc(var(--scroll-progress, 0) * 15%)
  );
}

/* Big Typography */
.poster-content {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
}
.align-left { align-items: flex-start; }
.align-right { align-items: flex-end; }
.align-center { align-items: center; }
.text-right { text-align: right; }
.text-center { text-align: center; }

/* Global default HUGE text (Hero uses this) */
.huge-text {
  font-family: var(--font-sans);
  font-size: clamp(80px, 14vw, 240px);
  line-height: 0.85;
  text-transform: uppercase;
  font-weight: 900;
  margin-bottom: 2rem;
  letter-spacing: -0.04em;
  color: #fff;
}

/* Hero Poster overrides */
.poster-hero .poster-bg { filter: brightness(0.8) contrast(1.1); }
.poster-hero .poster-overlay-gradient {
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 60%);
}
.hero-content-cinematic {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 10vh 5vw;
}
.hero-word {
  font-family: var(--font-serif-en);
  font-size: clamp(60px, 12vw, 150px);
  font-weight: 300;
  font-style: italic;
  color: #fff;
  letter-spacing: 0.05em;
  text-shadow: 4px 4px 20px rgba(0,0,0,0.8);
  line-height: 1;
}
.hero-bottom-right {
  align-self: flex-end;
  text-align: right;
  margin-bottom: 5vh; /* space for subtitle */
}
.hero-bottom-center {
  position: absolute;
  bottom: 8vh;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  width: 100%;
}
.sc-char {
  display: inline-block;
  transform: translate(calc(var(--sx) * var(--scroll-progress, 0)), calc(var(--sy) * var(--scroll-progress, 0))) rotate(calc(var(--sr) * var(--scroll-progress, 0)));
}
.hero-subtitle {
  font-family: var(--font-serif-jp);
  font-size: clamp(16px, 3vw, 24px);
  color: #fff;
  letter-spacing: 0.3em;
  margin: 0;
  font-weight: 300;
  text-shadow: 2px 2px 10px rgba(0,0,0,0.8);
}

/* DB Poster overrides - Tech/Sci-Fi bold poster */
.poster-db .poster-bg { filter: brightness(0.4) grayscale(80%); }
.poster-db .poster-overlay {
  background: repeating-linear-gradient(0deg, rgba(0,0,0,0.1) 0px, rgba(0,0,0,0.1) 2px, transparent 2px, transparent 4px);
}
.huge-jp-text {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(40px, 8vw, 120px);
  line-height: 1.4;
  color: #fff;
  letter-spacing: 0.1em;
  animation: tech-glitch 0.2s infinite alternate, tech-pulse 3s infinite ease-in-out;
}
.type-char {
  opacity: 0;
  display: inline-block;
  transition: opacity 0.1s;
}
.type-char {
  opacity: calc(clamp(0, (var(--scroll-progress, 0) * 20 - var(--char-index)), 1));
  transform: translateY(calc(10px - clamp(0, (var(--scroll-progress, 0) * 20 - var(--char-index)), 1) * 10px));
}
@keyframes tech-glitch {
  0% { text-shadow: 3px 0 0 rgba(0,255,255,0.7), -3px 0 0 rgba(255,0,255,0.7); }
  50% { text-shadow: -2px 0 0 rgba(0,255,255,0.7), 2px 0 0 rgba(255,0,255,0.7); }
  100% { text-shadow: 2px -2px 0 rgba(0,255,255,0.7), -2px 2px 0 rgba(255,0,255,0.7); }
}
@keyframes tech-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.9; transform: scale(1.02); }
}
.coming-soon-tape {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200vw;
  height: 100px;
  background-color: #fff;
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transform: translate(calc(-50% + (1 - var(--scroll-progress, 0)) * 100vw), -50%) rotate(-10deg);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  pointer-events: none;
}
.tape-text {
  font-family: var(--font-heavy);
  font-size: 60px;
  letter-spacing: 0.2em;
  white-space: nowrap;
}
.db-content {
  z-index: 5;
}
.db-info .ja-text {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(14px, 2vw, 18px);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  display: inline-block;
  padding: 10px 0;
  white-space: nowrap;
}

/* Portfolio Poster overrides - Elegant, Small and Minimalist */
.pf-bg { filter: brightness(0.7) contrast(1.2); }
.vertical-layout {
  writing-mode: vertical-rl;
  text-orientation: upright;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  padding-right: 10vw;
  height: 100vh;
}
.elegant-text-vertical {
  font-family: var(--font-serif-en);
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 300;
  font-style: italic;
  color: #fff;
  letter-spacing: 0.1em;
  margin-right: 2rem;
  text-orientation: mixed;
}
.pf-info-vertical {
  display: flex;
  flex-direction: row;
  align-items: center;
}
.vertical-lines {
  display: flex;
  flex-direction: row;
  margin-right: 1.5rem;
}
.ja-text-vertical {
  font-family: var(--font-serif-jp);
  font-size: clamp(16px, 2vw, 24px);
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.9);
  white-space: nowrap;
  margin: 0; 
}
.link-line-vertical {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  color: #fff;
  text-decoration: none;
  border-left: 1px solid #fff;
  padding-left: 0.5rem;
  letter-spacing: 0.1em;
  text-orientation: mixed;
}
.elegant-text-small {
  font-family: var(--font-serif-en);
  font-size: clamp(30px, 5vw, 60px);
  line-height: 1;
  font-weight: 300;
  font-style: italic;
  margin-bottom: 2rem;
  color: #fff;
  letter-spacing: 0.1em;
}
.pf-info .ja-text {
  font-family: var(--font-serif-jp);
  font-size: 1.3rem;
  font-weight: 400;
  letter-spacing: 0.3em;
  margin-bottom: 1.5rem;
}
.pf-info .link-line {
  font-family: var(--font-serif-jp);
  border-bottom: 1px solid rgba(255,255,255,0.4);
}

/* Blog Poster - Bold Magazine cover */
.blog-bg { filter: brightness(0.6) grayscale(50%); }
.poster-blog { background-color: #000; }
.magazine-text {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(60px, 12vw, 200px);
  line-height: 1;
  letter-spacing: -0.05em;
  color: #fff;
  margin-bottom: 2rem;
}
.blog-info .ja-text {
  font-weight: 700;
  font-size: 1.5rem;
  background: transparent;
  color: #fff;
  display: inline-block;
  padding: 5px 0;
  line-height: 1.5;
}
.blog-info .link-line {
  font-family: var(--font-sans);
  font-weight: 700;
  margin-top: 1rem;
  padding: 0.5rem 0;
  background: transparent;
  color: #fff;
  border: none;
  border-bottom: 1px solid #fff;
  font-size: 1.1rem;
}

.subtitle {
  font-family: var(--font-serif-jp);
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  color: #fff;
  font-weight: 600;
  text-shadow: 0 2px 10px rgba(0,0,0,0.8);
}

/* Info Box / Copy */
.info-box {
  max-width: 400px;
}
.ja-text {
  font-size: 1.1rem;
  line-height: 2;
  letter-spacing: 0.1em;
  font-weight: 300;
  color: rgba(255,255,255,0.9);
  margin-bottom: 2rem;
}

.badge {
  display: inline-block;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(255,255,255,0.4);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.link-line {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #fff;
  transition: opacity 0.3s ease;
}
.link-line:hover { opacity: 0.6; }

/* Scroll Animations Modifiers */
.scroll-move-left {
  transform: translateX(calc(var(--scroll-progress, 0) * -150px));
}
.scroll-move-right {
  transform: translateX(calc(var(--scroll-progress, 0) * 150px));
}
.scroll-scale-up {
  transform: scale(calc(1 + var(--scroll-progress, 0) * 0.3));
}
.scroll-fade-in {
  opacity: calc(0 + var(--scroll-progress, 0) * 2);
  transform: translateY(calc(10px - var(--scroll-progress, 0) * 10px));
}

.scroll-appear {
  opacity: calc(0 + var(--scroll-progress, 0) * 2);
  transform: translateY(calc(20px - var(--scroll-progress, 0) * 20px));
}

/* Footer */
.footer-minimal {
  position: relative;
  z-index: 100;
  background: #000;
  padding: 5vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-logo {
  font-family: var(--font-serif-en);
  font-style: italic;
  font-size: 1.5rem;
}
.footer-links {
  display: flex;
  gap: 2rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.opacity-muted { opacity: 0.4; }

/* Initial Load Animations */
.title-reveal {
  opacity: 0;
  transform: translateY(50px);
  animation: revealUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.2s;
}
.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  animation: revealUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards 0.6s;
}

@keyframes revealUp {
  to { opacity: 1; transform: translateY(0); }
}

/* =============================================
   レスポンシブ
   ============================================= */
@media (max-width: 768px) {
  .huge-text { font-size: clamp(60px, 18vw, 120px); }
  .info-box { margin-top: 2rem; }

  /* ヘッダー: スマホではハンバーガーを表示、PCナビを非表示 */
  .header-minimal {
    padding: 0 5vw;
    height: 56px;
  }
  .header-minimal nav {
    display: none; /* PCナビを隠す */
  }
  .nav-hamburger {
    display: flex; /* ハンバーガーを表示 */
  }

  .footer-minimal { flex-direction: column; gap: 2rem; align-items: flex-start; }
  .footer-links { flex-direction: column; gap: 1rem; }
}

@media (min-width: 769px) {
  /* PC: ドロワーは非表示 */
  .nav-drawer { display: none !important; }
  .nav-hamburger { display: none !important; }
}