/* ==========================================================================
   Base Styles & Variables (Strict Minimalist Pure White Theme - v3)
   ========================================================================== */
:root {
  --color-bg-white: #ffffff;
  --color-border: #e2e8f0;
  --color-border-dark: #0f172a;
  
  --color-text-primary: #0f172a;
  --color-text-secondary: #334155;
  --color-text-muted: #64748b;
  
  --font-serif: 'Noto Serif JP', Georgia, serif;
  --font-sans: 'Inter', 'Noto Sans JP', system-ui, -apple-system, sans-serif;
  
  --transition-smooth: all 0.2s ease-out;
  --shadow-minimal: 0 4px 20px rgba(0, 0, 0, 0.02);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg-white) !important;
  color: var(--color-text-primary);
  line-height: 1.8;
  letter-spacing: 0.02em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Typography
   ========================================================================== */
.serif {
  font-family: var(--font-serif);
}

.text-gold, .tech-accent {
  color: var(--color-text-primary);
  background: none !important;
  -webkit-background-clip: initial !important;
  -webkit-text-fill-color: initial !important;
  border-bottom: 2px solid var(--color-border-dark);
  font-weight: 700;
}

.text-green {
  color: #0f172a;
  font-weight: 700;
  text-decoration: underline;
}

.text-center {
  text-align: center;
}

.subtitle {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  font-weight: 600;
}

.section-title-area {
  margin-bottom: 60px;
}

.section-title-area h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.section-desc-lead {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 680px;
  margin: 0 auto;
}

/* ==========================================================================
   Buttons (Minimalist Monochrome)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
  transition: var(--transition-smooth);
  cursor: pointer;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn-xl {
  padding: 20px 48px;
  font-size: 1.1rem;
  font-weight: 700;
}

.btn-gold {
  background-color: var(--color-border-dark);
  color: var(--color-bg-white);
  border: 1px solid var(--color-border-dark);
}

.btn-gold:hover {
  background-color: #334155;
  border-color: #334155;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-dark);
}

.btn-outline:hover {
  background: rgba(15, 23, 42, 0.05);
}

.btn-block {
  display: flex;
  width: 100%;
}

.animate-pulse {
  animation: none !important; /* 脈動アニメーションもシンプル化のため無効化 */
}

/* ==========================================================================
   Header & Footer
   ========================================================================== */
.main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--color-border);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-text-primary);
}

.logo-accent {
  color: var(--color-text-primary);
  border-bottom: 2px solid var(--color-border-dark);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.main-footer {
  background-color: var(--color-bg-white);
  padding: 60px 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ==========================================================================
   Sections (Force Pure White Background)
   ========================================================================== */
.hero-section, 
.section, 
.concept-section, 
.proven-section, 
.rules-section-dark, 
.cta-section {
  position: relative;
  background-color: var(--color-bg-white) !important;
  background: var(--color-bg-white) !important;
  padding: 120px 0;
  border-bottom: 1px solid var(--color-border);
}

.hero-bg-glow {
  display: none !important;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 180px 0 100px;
}

.hero-container {
  text-align: center;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 0px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-dark);
  color: var(--color-text-primary);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 32px;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3.8rem;
  line-height: 1.3;
  font-weight: 900;
  color: var(--color-text-primary);
  margin-bottom: 24px;
}

.hero-title span {
  border-bottom: none !important;
}

.hero-main-phrase {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.hero-description {
  max-width: 760px;
  margin: 0 auto 48px;
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  line-height: 1.9;
}

.hero-dates {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.date-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 0px;
  font-size: 0.95rem;
  color: var(--color-text-primary);
}

.date-badge i {
  color: var(--color-text-primary);
  width: 18px;
  height: 18px;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 80px;
  flex-wrap: wrap;
}

/* Hero Cards */
.hero-visual-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 40px;
}

.vis-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 0px;
  padding: 32px;
  text-align: left;
  transition: var(--transition-smooth);
}

.vis-card:hover {
  border-color: var(--color-border-dark);
}

.vis-icon {
  margin-bottom: 20px;
}

.vis-icon i {
  width: 32px;
  height: 32px;
  color: var(--color-text-primary);
}

.vis-card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.vis-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ==========================================================================
   Problem Section
   ========================================================================== */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.problem-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: 0px;
  padding: 40px;
  position: relative;
}

.problem-badge {
  position: absolute;
  top: 24px;
  right: 24px;
  padding: 4px 12px;
  background: var(--color-bg-white);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-dark);
  border-radius: 0px;
  font-size: 0.75rem;
  font-weight: 700;
}

.problem-card h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-right: 80px; /* バッジとの重なり防止 */
}

.problem-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.solution-banner {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-dark);
  border-radius: 0px;
  padding: 40px;
  display: flex;
  gap: 32px;
  align-items: flex-start;
}

.solution-icon {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  padding: 16px;
  border-radius: 0px;
}

.solution-icon i {
  width: 28px;
  height: 28px;
  color: var(--color-text-primary);
}

.solution-content h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 12px;
}

.solution-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ==========================================================================
   Concept Section
   ========================================================================== */
.concept-content-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
  align-items: center;
}

.concept-visual {
  display: flex;
  justify-content: center;
}

/* Minimalist Book Design */
.classic-book {
  width: 200px;
  height: 290px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-dark);
  border-radius: 0px;
  box-shadow: 6px 6px 0px var(--color-border-dark);
  display: flex;
  position: relative;
}

.book-spine {
  width: 16px;
  height: 100%;
  background: var(--color-bg-white);
  border-right: 1px solid var(--color-border-dark);
}

.book-cover {
  flex-grow: 1;
  padding: 30px 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.book-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.4;
  letter-spacing: 0.05em;
}

.book-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.concept-text h2 {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  margin-bottom: 24px;
}

.concept-text p {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.concept-list {
  list-style: none;
}

.concept-list li {
  margin-bottom: 24px;
  position: relative;
  padding-left: 20px;
}

.concept-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  background-color: var(--color-border-dark);
  border-radius: 0%;
}

.concept-list li strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.concept-list li span {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ==========================================================================
   Routes Section
   ========================================================================== */
.routes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-top: 40px;
}

.route-card {
  background: var(--color-bg-white) !important;
  border: 1px solid var(--color-border);
  border-radius: 0px;
  padding: 48px;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.route-card:hover {
  border-color: var(--color-border-dark);
}

.route-header {
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 24px;
}

.route-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border-dark);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--color-text-primary);
}

.route-header h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.route-subtitle {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.route-intro {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  font-size: 0.95rem;
}

.route-features {
  list-style: none;
  margin-bottom: 40px;
  flex-grow: 1;
}

.route-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.route-features li i {
  flex-shrink: 0;
  margin-top: 4px;
  width: 16px;
  height: 16px;
  color: var(--color-text-primary);
}

.route-target {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  padding: 24px;
  border-radius: 0px;
  border-left: 3px solid var(--color-border-dark);
}

.route-target h4 {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.route-target p {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

.proven-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.proven-card {
  background: var(--color-bg-white) !important;
  border: 1px solid var(--color-border);
  border-radius: 0px;
  padding: 32px;
  text-align: center;
  transition: var(--transition-smooth);
}

.proven-card:hover {
  border-color: var(--color-text-muted);
}

.proven-num {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.1;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 8px;
}

.proven-num .unit {
  font-size: 1rem;
  margin-left: 2px;
  font-weight: 400;
}

.proven-card h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.proven-card p {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ==========================================================================
   Timeline / Schedule
   ========================================================================== */
.timeline {
  max-width: 760px;
  margin: 40px auto 60px;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  width: 1px;
  height: 100%;
  background-color: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-left: 48px;
  margin-bottom: 48px;
}

.timeline-dot {
  position: absolute;
  left: 11px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-bg-white);
  border: 2px solid var(--color-border-dark);
  z-index: 2;
}

.timeline-date {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.timeline-content h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.timeline-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* Accordion for 125 Roadmap ToDos */
.roadmap-accordion-wrapper {
  max-width: 760px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: 0px;
  background: var(--color-bg-white) !important;
}

.accordion-trigger {
  width: 100%;
  padding: 20px 24px;
  background: transparent;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.accordion-trigger:hover {
  background: rgba(0,0,0,0.02);
}

.accordion-trigger .arrow-icon {
  transition: transform 0.25s ease;
  width: 18px;
  height: 18px;
}

.accordion-trigger.active .arrow-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-inner {
  padding: 0 24px 24px;
  border-top: 1px solid var(--color-border);
}

.roadmap-category {
  margin-top: 24px;
}

.roadmap-category h4 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 12px;
}

.roadmap-category ul {
  list-style: none;
}

.roadmap-category ul li {
  position: relative;
  padding-left: 20px;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  margin-bottom: 8px;
  line-height: 1.6;
}

.roadmap-category ul li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Rules Section
   ========================================================================== */
.rules-box {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  max-width: 860px;
  margin: 40px auto 60px;
}

.rule-item {
  display: flex;
  gap: 24px;
  background: var(--color-bg-white) !important;
  border: 1px solid var(--color-border);
  padding: 32px;
  border-radius: 0px;
}

.rule-num {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
}

.rule-text h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.rule-text p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

.revenue-share-info {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  background: var(--color-bg-white) !important;
  border: 1px dashed var(--color-border-dark);
  padding: 32px;
  border-radius: 0px;
}

.share-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  color: var(--color-text-primary);
}

.revenue-share-info h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.revenue-share-info p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-list {
  max-width: 760px;
  margin: 40px auto 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 24px 0;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.faq-question:hover {
  opacity: 0.8;
}

.faq-icon {
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
  transition: transform 0.25s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--color-text-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-answer p {
  padding-top: 16px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-box {
  max-width: 580px;
  margin: 40px auto 0;
  background: var(--color-bg-white) !important;
  border: 1px solid var(--color-border-dark);
  border-radius: 0px;
  padding: 48px;
}

.cta-box h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.cta-limit {
  color: #991b1b;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 32px;
}

.cta-buttons {
  margin-bottom: 16px;
}

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

/* ==========================================================================
   Profile Section
   ========================================================================== */
.profile-section {
  background-color: var(--color-bg-white) !important;
  border-bottom: 1px solid var(--color-border);
  padding: 100px 0;
}

.profile-wrapper {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  gap: 48px;
  align-items: flex-start;
}

.profile-image-container {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.profile-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-info {
  flex: 1;
}

.profile-name-area {
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 12px;
}

.profile-name {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.profile-name span {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 400;
  margin-left: 12px;
}

.profile-title {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.profile-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.profile-text p {
  margin-bottom: 16px;
}

.profile-text p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Responsive Utilities
   ========================================================================== */
.mobile-only {
  display: none;
}

@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  .hero-visual-cards {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .proven-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  body {
    font-size: 95%;
  }
  
  .container {
    padding: 0 20px;
  }
  
  .main-header {
    padding: 10px 0;
  }
  
  .nav-links {
    display: none;
  }
  
  .mobile-only {
    display: block;
  }
  
  .hero-section {
    padding: 140px 0 60px;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-main-phrase {
    font-size: 1.3rem;
  }
  
  .hero-description {
    font-size: 0.95rem;
  }
  
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    align-items: stretch;
  }
  
  .problem-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .concept-content-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .routes-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .route-card {
    padding: 32px;
  }
  
  .proven-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .rules-box {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .cta-box {
    padding: 32px 20px;
  }
  
  .cta-title {
    font-size: 1.8rem;
  }
  
  .profile-wrapper {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 32px;
  }
  
  .profile-name-area {
    text-align: center;
  }
  
  .profile-text {
    text-align: left;
  }
}