/* ==========================================================================
   Design System & Variable Declarations
   ========================================================================== */
:root {
  /* Color Palette */
  --color-primary-dark: #12281a;     /* アボカドリーフの深いグリーン */
  --color-primary-light: #5c7f43;    /* みずみずしいライトグリーン */
  --color-accent-gold: #c39c4a;      /* お茶の透明感のあるゴールドグリーン */
  --color-bg-beige: #f5f1e8;         /* 温かみのあるベージュ */
  --color-bg-white: #fafafa;         /* 温白色（オフホワイト） */
  --color-bg-overlay: rgba(18, 40, 26, 0.18); /* 18%透過のダークグリーン */
  
  --color-text-dark: #1f2f25;        /* メインテキスト色 */
  --color-text-muted: #5e6f63;       /* サブテキスト色 */
  --color-text-light: #fafafa;       /* 明るい背景用のテキスト色 */
  
  /* Fonts */
  --font-serif: 'Noto Serif JP', 'Georgia', serif;
  --font-sans: 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
  --font-accent: 'Playfair Display', serif;
  
  /* Transition / Easing (ゆったりとした情緒的な動きに設定) */
  --ease-premium: cubic-bezier(0.25, 1, 0.5, 1);
  --transition-slow: all 1.4s var(--ease-premium);
  --transition-medium: all 0.8s var(--ease-premium);
  --transition-fast: all 0.4s ease-in-out;
  
  /* Spacing */
  --site-width: 1200px;
}

/* ==========================================================================
   Reset CSS & Global Settings
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-white);
  color: var(--color-text-dark);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
  word-wrap: break-word;
}

/* Typography elements */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-primary-dark);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   Reusable UI Components & Helpers
   ========================================================================== */
.section-container {
  max-width: var(--site-width);
  margin: 0 auto;
  padding: 100px 24px;
  position: relative;
  z-index: 2;
}

.section-tag {
  font-family: var(--font-accent);
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  display: block;
  margin-bottom: 16px;
  font-weight: 600;
}

.section-tag.text-gold {
  color: var(--color-accent-gold);
}

.section-title {
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  color: var(--color-primary-dark);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  font-weight: 300;
}

.section-header-center {
  text-align: center;
  margin-bottom: 60px;
}

/* Premium Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 40px;
  letter-spacing: 0.1em;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-fast);
}

.btn-header {
  padding: 10px 24px;
  font-size: 0.85rem;
  background-color: var(--color-primary-dark);
  color: var(--color-bg-white);
  border: 1px solid var(--color-primary-dark);
}

.btn-header:hover {
  background-color: transparent;
  color: var(--color-primary-dark);
}

.btn-primary {
  background-color: var(--color-primary-dark);
  color: var(--color-bg-white);
  border: 1px solid var(--color-primary-dark);
  font-family: var(--font-sans);
  box-shadow: 0 4px 20px rgba(18, 40, 26, 0.15);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(92, 127, 67, 0.3);
}

/* ==========================================================================
   Header Style
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: transparent;
  transition: var(--transition-medium);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* Scrolled header state */
.site-header.scrolled {
  background-color: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(18, 40, 26, 0.05);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.02);
}

.site-header.scrolled .brand-logo .en-brand {
  color: var(--color-primary-dark);
}

.site-header.scrolled .brand-logo .jp-brand {
  color: var(--color-primary-light);
}

.site-header.scrolled .nav-link {
  color: var(--color-text-dark);
}

.site-header.scrolled .nav-link::after {
  background-color: var(--color-primary-light);
}

.header-container {
  max-width: var(--site-width);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-logo .en-brand {
  font-family: var(--font-accent);
  font-size: 1.4rem;
  letter-spacing: 0.15em;
  font-weight: 600;
  color: var(--color-bg-white);
  transition: var(--transition-fast);
}

.brand-logo .jp-brand {
  font-size: 0.65rem;
  letter-spacing: 0.4em;
  margin-top: 3px;
  color: var(--color-primary-light);
  font-weight: 500;
  transition: var(--transition-fast);
}

.nav-menu {
  display: flex;
  gap: 36px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-bg-white);
  position: relative;
  padding: 6px 0;
  letter-spacing: 0.05em;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-bg-white);
  transition: var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

/* ==========================================================================
   1. Hero Section (ファーストビュー)
   ========================================================================== */
.hero-section {
  position: relative;
  height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-bg-white);
  overflow: hidden;
}

.hero-video-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden; /* 拡大された動画がはみ出すのを防ぐ */
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.25); /* 右側のGeminiマークを完全に隠すために25%拡大 */
  transform-origin: left center; /* 左側を基準に右側を大きく切り落とす */
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-bg-overlay);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
}

.hero-subtext {
  font-family: var(--font-accent);
  font-size: 1.1rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  margin-bottom: 24px;
  display: block;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 600;
  color: var(--color-bg-white);
  line-height: 1.4;
  margin-bottom: 30px;
  letter-spacing: 0.08em;
}

.hero-desc {
  font-size: 1.1rem;
  font-weight: 300;
  letter-spacing: 0.08em;
  max-width: 600px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.8;
}

/* Scroll Down Indicator */
.scroll-down {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--color-bg-white);
  opacity: 0.8;
}

.scroll-down-text {
  font-family: var(--font-accent);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.scroll-down-arrow {
  animation: bounce 2s infinite ease-in-out;
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(8px);
  }
}

/* ==========================================================================
   2. Induction Section (アボカド茶とは)
   ========================================================================== */
.induction-section {
  background-color: var(--color-bg-beige);
  position: relative;
  overflow: hidden;
}

.induction-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}

.induction-video-container {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(18, 40, 26, 0.08);
  aspect-ratio: 4/3;
  transform: scale(0.95);
  opacity: 0;
  transition: var(--transition-slow);
}

.induction-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.25); /* 右側のGeminiマークを完全に隠すために25%拡大 */
  transform-origin: left center; /* 左側を基準に右側を大きく切り落とす */
}

.video-tint {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(18, 40, 26, 0.05);
}

.induction-content {
  opacity: 0;
  transform: translateX(40px);
  transition: var(--transition-slow);
}

.section-text-block p {
  color: var(--color-text-muted);
  margin-bottom: 20px;
  font-size: 1.05rem;
  font-weight: 300;
}

.text-highlight {
  color: var(--color-primary-dark) !important;
  font-weight: 500 !important;
  border-left: 3px solid var(--color-primary-light);
  padding-left: 16px;
  margin-top: 30px;
}

/* Scroll Active States */
.induction-video-container.active {
  transform: scale(1);
  opacity: 1;
}

.induction-content.active {
  transform: translateX(0);
  opacity: 1;
}

/* ==========================================================================
   3. Benefit Section (3つのこだわり)
   ========================================================================== */
.benefits-section {
  background-color: var(--color-bg-white);
  position: relative;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.benefit-card {
  background-color: var(--color-bg-beige);
  padding: 60px 40px;
  border-radius: 16px;
  border: 1px solid rgba(18, 40, 26, 0.03);
  transition: var(--transition-medium);
  opacity: 0;
  transform: translateY(40px);
}

.benefit-card.active {
  opacity: 1;
  transform: translateY(0);
}

/* Sequential delay for cards */
#benefit-card-1.active { transition-delay: 0.1s; }
#benefit-card-2.active { transition-delay: 0.3s; }
#benefit-card-3.active { transition-delay: 0.5s; }

.benefit-icon {
  color: var(--color-primary-dark);
  margin-bottom: 30px;
  display: inline-flex;
  transition: var(--transition-fast);
}

.benefit-card-title {
  font-size: 1.35rem;
  margin-bottom: 18px;
  font-weight: 600;
  transition: var(--transition-fast);
}

.benefit-card-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 300;
  line-height: 1.7;
}

/* Hover effects */
.benefit-card:hover {
  transform: translateY(-8px);
  background-color: #ffffff;
  box-shadow: 0 20px 40px rgba(18, 40, 26, 0.06);
  border-color: rgba(92, 127, 67, 0.15);
}

.benefit-card:hover .benefit-icon {
  color: var(--color-primary-light);
  transform: scale(1.08);
}

.benefit-card:hover .benefit-card-title {
  color: var(--color-primary-light);
}

/* ==========================================================================
   4. Story Section (ストーリーセクション - パララックス)
   ========================================================================== */
.story-section {
  position: relative;
  overflow: hidden;
  height: 650px;
  display: flex;
  align-items: center;
  color: var(--color-bg-white);
}

.story-parallax-bg {
  position: absolute;
  top: -20%;
  left: 0;
  width: 100%;
  height: 140%;
  background-image: url('assets/avocado_leaf.png');
  background-size: cover;
  background-position: center;
  z-index: 1;
  transform: translateY(0);
  will-change: transform;
}

.story-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(18, 40, 26, 0.8) 0%,
    rgba(18, 40, 26, 0.6) 50%,
    rgba(18, 40, 26, 0.8) 100%
  );
  z-index: 2;
}

.story-content {
  z-index: 3;
  width: 100%;
  display: flex;
  justify-content: center;
}

.story-inner {
  max-width: 700px;
  text-align: center;
  padding: 0 24px;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

.story-inner.active {
  opacity: 1;
  transform: translateY(0);
}

.story-title {
  color: var(--color-bg-white);
  font-size: 2.2rem;
  margin-bottom: 30px;
  letter-spacing: 0.08em;
}

.story-text {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
  font-weight: 300;
  margin-bottom: 18px;
  letter-spacing: 0.06em;
}

/* ==========================================================================
   5. CTA Section (購入・お問い合わせ)
   ========================================================================== */
.cta-section {
  background-color: var(--color-bg-beige);
  position: relative;
  text-align: center;
}

.cta-box {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 40px;
  background-color: #ffffff;
  border-radius: 24px;
  box-shadow: 0 30px 60px rgba(18, 40, 26, 0.05);
  border: 1px solid rgba(18, 40, 26, 0.02);
  opacity: 0;
  transform: translateY(40px);
  transition: var(--transition-slow);
}

.cta-box.active {
  opacity: 1;
  transform: translateY(0);
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 40px auto;
  font-weight: 300;
}

.product-mini-info {
  margin-bottom: 36px;
  padding: 16px 24px;
  background-color: var(--color-bg-beige);
  border-radius: 12px;
  display: inline-block;
}

.product-price {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.price-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.price-value {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--color-primary-dark);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.price-value small {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: 8px;
}

/* CTA Action & Pulse effect */
.cta-action-wrapper {
  margin-bottom: 24px;
}

.btn-pulse {
  animation: pulse-border 2.5s infinite var(--ease-premium);
}

@keyframes pulse-border {
  0% {
    box-shadow: 0 0 0 0 rgba(18, 40, 26, 0.4), 0 4px 20px rgba(18, 40, 26, 0.15);
  }
  70% {
    box-shadow: 0 0 0 15px rgba(18, 40, 26, 0), 0 4px 20px rgba(18, 40, 26, 0.15);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(18, 40, 26, 0), 0 4px 20px rgba(18, 40, 26, 0.15);
  }
}

/* Glint (光が走る) Effect */
.btn-glint {
  position: absolute;
  top: 0;
  left: -150%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    to right,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-25deg);
  pointer-events: none;
}

.btn-primary:hover .btn-glint {
  animation: glint-animation 1.2s var(--ease-premium);
}

@keyframes glint-animation {
  0% {
    left: -150%;
  }
  100% {
    left: 200%;
  }
}

.cta-sub-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Footer Style
   ========================================================================== */
.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 80px 0 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.site-footer .section-container {
  padding: 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
  margin-bottom: 60px;
}

.footer-brand .en-brand {
  font-family: var(--font-accent);
  font-size: 1.6rem;
  letter-spacing: 0.15em;
  font-weight: 600;
  color: var(--color-bg-white);
  display: block;
}

.footer-brand .jp-brand {
  font-size: 0.75rem;
  letter-spacing: 0.4em;
  margin-top: 4px;
  color: var(--color-primary-light);
  font-weight: 500;
  display: block;
  margin-bottom: 24px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 320px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.footer-link-group h4 {
  font-family: var(--font-sans);
  color: var(--color-bg-white);
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.footer-link-group a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
  margin-bottom: 12px;
  transition: var(--transition-fast);
}

.footer-link-group a:hover {
  color: var(--color-accent-gold);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 30px;
  display: flex;
  justify-content: center;
}

.copyright {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
}

/* ==========================================================================
   Scroll Trigger Base Styles (JS Intersection Observer Classes)
   ========================================================================== */
.scroll-fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition-slow);
}

.scroll-fade-in-up.active {
  opacity: 1;
  transform: translateY(0);
}

/* Sequence delays for hero copy */
.hero-content .scroll-fade-in-up:nth-child(1) { transition-delay: 0.1s; }
.hero-content .scroll-fade-in-up:nth-child(2) { transition-delay: 0.3s; }
.hero-content .scroll-fade-in-up:nth-child(3) { transition-delay: 0.5s; }

/* Custom trigger classes */
.scroll-trigger-fade {
  opacity: 0;
  transition: var(--transition-slow);
}

.scroll-trigger-fade.active {
  opacity: 1;
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 1024px) {
  .induction-grid {
    gap: 40px;
  }
  .benefits-grid {
    gap: 24px;
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .site-header {
    background-color: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(18, 40, 26, 0.05);
  }

  .site-header .brand-logo .en-brand {
    color: var(--color-primary-dark);
  }

  .site-header .brand-logo .jp-brand {
    color: var(--color-primary-light);
  }

  .nav-menu {
    display: none; /* Hide standard menu on mobile for minimalism */
  }

  .header-container {
    padding: 14px 20px;
  }

  .hero-title {
    font-size: 2.4rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .induction-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .induction-video-container {
    aspect-ratio: 16/10;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .benefit-card {
    padding: 40px 30px;
  }

  .story-section {
    height: auto;
  }

  .story-parallax-bg {
    height: 120%;
    top: -10%;
  }

  .story-inner {
    padding: 80px 0;
  }

  .story-title {
    font-size: 1.8rem;
  }

  .cta-box {
    padding: 60px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .footer-links {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .btn {
    width: 100%;
  }
}

/* ==========================================================================
   Floating Back Button
   ========================================================================== */
.floating-back-btn {
  position: fixed;
  bottom: 30px;
  left: 30px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 50px;
  background-color: var(--color-primary-dark);
  color: var(--color-bg-white);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-fast);
  text-decoration: none;
}

.floating-back-btn:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(92, 127, 67, 0.3);
}

.floating-back-btn .back-icon {
  stroke: var(--color-bg-white);
}

@media (max-width: 768px) {
  .floating-back-btn {
    bottom: 20px;
    left: 20px;
    padding: 10px 16px;
    font-size: 0.8rem;
  }
}

/* ==========================================================================
   Coming Soon Page Styles
   ========================================================================== */
.coming-soon-section {
  min-height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-beige);
  padding: 120px 24px 80px 24px;
  position: relative;
  overflow: hidden;
  text-align: center;
  z-index: 10;
}

.coming-soon-box {
  max-width: 650px;
  width: 100%;
  background-color: #ffffff;
  padding: 80px 40px;
  border-radius: 24px;
  box-shadow: 0 30px 60px rgba(18, 40, 26, 0.05);
  border: 1px solid rgba(18, 40, 26, 0.02);
  z-index: 2;
  position: relative;
}

.coming-soon-icon {
  color: var(--color-primary-dark);
  margin-bottom: 24px;
  display: inline-flex;
}

.coming-soon-tag {
  font-family: var(--font-accent);
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  display: block;
  margin-bottom: 16px;
  font-weight: 600;
}

.coming-soon-title {
  font-size: 2.2rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  color: var(--color-primary-dark);
}

.coming-soon-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 500px;
  margin: 0 auto 40px auto;
  font-weight: 300;
  line-height: 1.8;
}

.coming-soon-bg-pattern {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(92,127,67,0.06) 0%, rgba(250,250,250,0) 70%);
  z-index: 1;
  pointer-events: none;
}