/* ============================================
   焼肉 千番閣 - Coming Soon
   style.css
   ============================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:         #0A0A0A;
  --text:       #F9F9F7;
  --gold:       #D4AF37;
  --red:        #9E2A2B;
  --text-muted: rgba(249,249,247,0.5);
  --serif:      'Noto Serif JP', 'Yu Mincho', serif;
  --sans:       'Montserrat', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── LOADER ─────────────────────────────── */
#loader {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 999;
  transition: opacity 1s ease 2.2s, visibility 0s 3.2s;
}
#loader.hidden { opacity: 0; visibility: hidden; }

.loader-logo {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 300;
  letter-spacing: 0.4em;
  color: var(--text);
  opacity: 0;
  animation: inkBloom 1.8s ease forwards 0.3s;
}

@keyframes inkBloom {
  0%   { opacity: 0; filter: blur(12px); letter-spacing: 0.8em; }
  100% { opacity: 1; filter: blur(0);    letter-spacing: 0.4em; }
}

/* ── HEADER ──────────────────────────────── */
header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 28px 48px;
  display: flex; align-items: center; justify-content: space-between;
  opacity: 0;
  animation: fadeUp 1s ease forwards 2.8s;
}

.logo {
  font-family: var(--serif);
  font-size: 1.05rem; font-weight: 300;
  letter-spacing: 0.35em;
  color: var(--text); text-decoration: none;
}

.ig-link {
  font-family: var(--sans);
  font-size: 0.62rem; font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--text-muted); text-decoration: none;
  display: flex; align-items: center; gap: 8px;
  transition: color 0.4s;
}
.ig-link:hover { color: var(--gold); }

.ig-icon {
  width: 15px; height: 15px;
  stroke: currentColor; fill: none;
  stroke-width: 1.5; stroke-linecap: round;
}

/* ── SECTION 1: HERO（全画面背景）────────── */
#hero {
  height: 100vh;
  position: relative;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}

/* 全画面背景写真 */
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('../images/hero_bg.webp');
  background-size: cover;
  background-position: center 40%;
  /* パララックス: スクロール時に背景がわずかに遅れる */
  will-change: transform;
  transform: scale(1.08);
  transition: transform 0s;
}

/* グラデーションオーバーレイ: 下・左を暗くして文字を際立てる */
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(to right,  rgba(10,10,10,0.72) 0%, rgba(10,10,10,0.1) 65%, transparent 100%),
    linear-gradient(to top,    rgba(10,10,10,0.85) 0%, rgba(10,10,10,0.0) 50%),
    linear-gradient(to bottom, rgba(10,10,10,0.5)  0%, rgba(10,10,10,0.0) 30%);
  z-index: 1;
}

/* ゴールドのアクセントライン */
.hero-line {
  position: absolute;
  left: 48px; top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: clamp(80px, 14vh, 140px);
  background: linear-gradient(to bottom, transparent, var(--gold), transparent);
  z-index: 2;
  opacity: 0;
  animation: fadeUp 1.2s ease forwards 3.4s;
}

/* コピー：左寄せ・縦書き */
.hero-copy-wrap {
  position: absolute;
  left: clamp(60px, 8vw, 120px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 32px;
  opacity: 0;
  animation: heroReveal 1.8s cubic-bezier(0.16,1,0.3,1) forwards 3.1s;
}

@keyframes heroReveal {
  0%   { opacity: 0; transform: translateY(calc(-50% + 24px)); }
  100% { opacity: 1; transform: translateY(-50%); }
}

.hero-copy {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1.1rem, 2.2vw, 1.6rem);
  letter-spacing: 0.28em;
  line-height: 2.4;
  color: var(--text);
  text-shadow: 0 2px 24px rgba(0,0,0,0.6);
}

.hero-sub {
  font-family: var(--sans);
  font-size: clamp(0.55rem, 0.9vw, 0.68rem);
  font-weight: 200;
  letter-spacing: 0.38em;
  color: var(--gold);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  margin-top: 4px;
}

.scroll-indicator {
  position: absolute; bottom: 40px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  opacity: 0;
  animation: fadeUp 1s ease forwards 4.2s;
  z-index: 2;
}
.scroll-line {
  width: 1px; height: 48px;
  background: linear-gradient(to bottom, transparent, var(--gold));
  animation: scrollPulse 2.5s ease-in-out infinite;
}
.scroll-text {
  font-family: var(--sans);
  font-size: 0.55rem; font-weight: 200;
  letter-spacing: 0.35em; color: var(--gold);
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(0.85); }
  50%       { opacity: 1;   transform: scaleY(1); }
}

/* ── SECTION 2: STORY ────────────────────── */
#story {
  padding: 180px 60px;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; max-width: 1100px;
  margin: 0 auto; gap: 80px;
}

.story-text {
  opacity: 0; transform: translateY(40px);
  transition: opacity 1s ease, transform 1s ease;
}
.story-text.visible { opacity: 1; transform: translateY(0); }

.section-label {
  font-family: var(--sans);
  font-size: 0.55rem; font-weight: 400;
  letter-spacing: 0.35em; color: var(--gold);
  margin-bottom: 36px; display: block;
}

.story-body {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(0.9rem, 1.3vw, 1.05rem);
  line-height: 2.6; letter-spacing: 0.12em;
  color: var(--text); opacity: 0.88;
}

.story-image {
  position: relative; opacity: 0; transform: translateY(40px);
  transition: opacity 1.2s ease 0.2s, transform 1.2s ease 0.2s;
}
.story-image.visible { opacity: 1; transform: translateY(0); }

.image-frame {
  width: 100%; aspect-ratio: 3/4;
  background: #1a1612;
  position: relative; overflow: hidden;
  transition: filter 0.7s ease;
}
.image-frame:hover { filter: contrast(1.08); }
.image-frame img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  filter: grayscale(60%) sepia(20%);
}

.sepia-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg,
    rgba(158,42,43,0.06) 0%,
    rgba(212,175,55,0.04) 100%);
  pointer-events: none;
}
.image-border {
  position: absolute; inset: 12px;
  border: 1px solid rgba(212,175,55,0.15);
  pointer-events: none;
}

/* ── SECTION 3: PRODUCT ──────────────────── */
#product {
  padding: 180px 60px;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; max-width: 1100px;
  margin: 0 auto; gap: 80px;
}

.product-image {
  position: relative; opacity: 0; transform: translateY(40px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}
.product-image.visible { opacity: 1; transform: translateY(0); }

.product-frame {
  aspect-ratio: 1/1;
  background: #0d0a07;
  position: relative; overflow: hidden;
  transition: filter 0.6s ease;
}
.product-frame:hover { filter: brightness(1.1) saturate(1.15); }
.product-frame img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center 15%;
  display: block;
}

.product-text {
  writing-mode: vertical-rl; text-orientation: mixed;
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(1rem, 1.8vw, 1.3rem);
  letter-spacing: 0.22em; line-height: 2.4;
  color: var(--text);
  opacity: 0; transform: translateX(20px);
  transition: opacity 1.2s ease 0.3s, transform 1.2s ease 0.3s;
  justify-self: center;
}
.product-text.visible { opacity: 1; transform: translateX(0); }
.product-text .accent { color: var(--gold); }

/* ── SECTION 4: CTA ──────────────────────── */
#cta {
  padding: 200px 60px;
  text-align: center;
  display: flex; flex-direction: column; align-items: center;
}

.open-year {
  font-family: var(--sans);
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 200; letter-spacing: 0.15em;
  color: var(--text);
  opacity: 0; transform: translateY(30px);
  transition: opacity 1s ease, transform 1s ease;
  line-height: 1;
}
.open-year.visible { opacity: 1; transform: translateY(0); }

.open-sub {
  font-family: var(--sans);
  font-size: clamp(0.6rem, 1.2vw, 0.75rem);
  font-weight: 400; letter-spacing: 0.4em;
  color: var(--gold); margin-top: 16px;
  opacity: 0; transition: opacity 1s ease 0.2s;
}
.open-sub.visible { opacity: 1; }

.divider {
  width: 1px; height: 80px;
  background: linear-gradient(to bottom,
    transparent, rgba(212,175,55,0.3), transparent);
  margin: 60px auto;
  opacity: 0; transition: opacity 1s ease 0.3s;
}
.divider.visible { opacity: 1; }

.cta-message {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(0.8rem, 1.2vw, 0.95rem);
  letter-spacing: 0.12em; line-height: 2.4;
  color: rgba(249,249,247,0.65);
  max-width: 420px; margin: 0 auto;
  opacity: 0; transform: translateY(20px);
  transition: opacity 1s ease 0.4s, transform 1s ease 0.4s;
}
.cta-message.visible { opacity: 1; transform: translateY(0); }

.cta-btn {
  display: inline-block;
  margin-top: 52px; padding: 18px 44px;
  border: 1px solid var(--gold);
  font-family: var(--sans);
  font-size: 0.65rem; font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--gold); text-decoration: none;
  background: transparent; cursor: pointer;
  opacity: 0; transform: translateY(20px);
  transition:
    background 0.5s ease, color 0.5s ease,
    opacity 1s ease 0.6s, transform 1s ease 0.6s;
}
.cta-btn:hover { background: var(--text); color: #0A0A0A; }
.cta-btn.visible { opacity: 1; transform: translateY(0); }

/* ── FOOTER ──────────────────────────────── */
footer {
  padding: 48px 60px;
  border-top: 1px solid rgba(249,249,247,0.06);
  text-align: center;
}
footer p {
  font-family: var(--sans);
  font-size: 0.58rem; font-weight: 200;
  letter-spacing: 0.2em;
  color: rgba(249,249,247,0.25);
}

/* ── ANIMATIONS ──────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── MOBILE ──────────────────────────────── */
@media (max-width: 768px) {
  header { padding: 20px 24px; }

  .hero-copy-wrap { left: 28px; }
  .hero-line { left: 24px; }
  .hero-copy { font-size: 1rem; letter-spacing: 0.22em; }

  #story,
  #product {
    grid-template-columns: 1fr;
    padding: 100px 24px;
    gap: 48px;
  }

  .product-text {
    writing-mode: horizontal-tb;
    font-size: 1rem;
    letter-spacing: 0.15em;
    line-height: 2.2;
    text-align: center;
  }

  #cta { padding: 120px 24px; }
}

/* ── SECTION 5: PRODUCTS AD ──────────────── */
#products-ad {
  padding: 160px 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  border-top: 1px solid rgba(212,175,55,0.12);
}

.products-ad-label {
  font-family: var(--sans);
  font-size: 0.55rem; font-weight: 400;
  letter-spacing: 0.35em; color: var(--gold);
  margin-bottom: 64px; display: block;
  text-align: center;
}

.products-ad-frame {
  position: relative;
  max-width: 640px;
  width: 100%;
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}
.products-ad-frame.visible { opacity: 1; transform: translateY(0); }

.products-ad-frame img {
  width: 100%;
  display: block;
  border: 1px solid rgba(212,175,55,0.12);
  /* ホバーで彩度・明るさがわずかに上がる */
  transition: filter 0.7s ease;
}
.products-ad-frame img:hover {
  filter: brightness(1.06) saturate(1.1);
}

/* 四隅のゴールド装飾 */
.products-ad-frame::before,
.products-ad-frame::after {
  content: '';
  position: absolute;
  width: 20px; height: 20px;
  border-color: var(--gold);
  border-style: solid;
  opacity: 0.5;
}
.products-ad-frame::before {
  top: -6px; left: -6px;
  border-width: 1px 0 0 1px;
}
.products-ad-frame::after {
  bottom: -6px; right: -6px;
  border-width: 0 1px 1px 0;
}

@media (max-width: 768px) {
  #products-ad { padding: 100px 24px; }
  .products-ad-frame { max-width: 100%; }
}

/* ── INTERLUDE（区切り文）────────────────── */
.interlude {
  padding: 100px 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}
.interlude.visible { opacity: 1; transform: translateY(0); }

.interlude-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--gold));
}
.interlude-line.bottom {
  background: linear-gradient(to top, transparent, var(--gold));
}

.interlude-text {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1rem, 2.4vw, 1.3rem);
  letter-spacing: 0.28em;
  line-height: 2.2;
  color: var(--gold);
}

.interlude-sub {
  font-family: var(--sans);
  font-size: 0.58rem;
  font-weight: 200;
  letter-spacing: 0.38em;
  color: rgba(212,175,55,0.45);
  margin-top: -8px;
}

@media (max-width: 768px) {
  .interlude { padding: 80px 32px; }
  .interlude-text { font-size: 1rem; letter-spacing: 0.2em; }
}