/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --gold: #6B5E50;
  --gold-light: #D5CFC8;
  --gold-dark: #4A4038;
  --dark: #2C2520;
  --dark-light: #3D342D;
  --gray: #7A7168;
  --light: #F7F5F3;
  --white: #FFFFFF;
  --max-width: 1200px;
  --font-zh: 'Noto Sans TC', -apple-system, 'Segoe UI', sans-serif;
  --font-en: 'Inter', -apple-system, 'Segoe UI', sans-serif;
  --font-ja: 'Noto Sans JP', -apple-system, 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Meiryo', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-zh);
  color: var(--dark);
  line-height: 1.7;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

html[lang="ja"] body {
  font-family: var(--font-ja);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Language Toggle Nav (segmented control) === */
.lang-nav {
  position: fixed;
  top: 20px;
  right: 24px;
  z-index: 100;
  display: inline-flex;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border: 1px solid var(--gold);
  border-radius: 24px;
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--gold);
  padding: 6px 14px;
  border-radius: 22px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  line-height: 1;
  transition: background 0.2s, color 0.2s;
}

.lang-btn:hover:not(.is-active) {
  background: var(--gold-light);
}

.lang-btn.is-active {
  background: var(--gold);
  color: var(--white);
  cursor: default;
}

/* === Hero === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #5C5245 0%, #B8AFA6 40%, #E8E3DD 70%, #F5F2EF 100%);
  padding: 80px 24px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 25% 40%, rgba(255,255,255,0.25) 0%, transparent 45%), radial-gradient(ellipse at 75% 60%, rgba(255,255,255,0.1) 0%, transparent 40%);
  pointer-events: none;
}

.hero-logo {
  width: clamp(80px, 12vw, 140px);
  height: auto;
  margin-bottom: 12px;
  filter: drop-shadow(0 4px 16px rgba(0,0,0,0.12));
}

.hero-title {
  font-family: var(--font-en);
  font-size: clamp(48px, 10vw, 96px);
  font-weight: 700;
  letter-spacing: 12px;
  margin-bottom: 12px;
  background: linear-gradient(
    135deg,
    #3D342D 0%,
    #6B5E50 20%,
    #D5CFC8 40%,
    #F5F2EF 50%,
    #D5CFC8 60%,
    #6B5E50 80%,
    #3D342D 100%
  );
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 6s ease-in-out infinite;
  filter: drop-shadow(0 2px 4px rgba(74,64,56,0.2));
}

@keyframes shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: clamp(16px, 3vw, 22px);
  color: var(--dark);
  max-width: 600px;
  margin: 0 auto 24px;
  opacity: 0.8;
}

.hero-tags {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.tag {
  background: rgba(26,26,46,0.1);
  color: var(--dark);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-family: var(--font-en);
  font-weight: 600;
}

.hero-notice {
  color: var(--dark);
  background: rgba(255,255,255,0.6);
  display: inline-block;
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--dark);
  color: var(--white);
  border-color: var(--dark);
}

.btn-primary:hover {
  background: var(--dark-light);
  border-color: var(--dark-light);
}

.btn-outline {
  background: transparent;
  color: var(--dark);
  border-color: var(--dark);
}

.btn-outline:hover {
  background: var(--dark);
  color: var(--white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

.btn.disabled, a.disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

/* === Sections === */
.section {
  padding: 96px 24px;
}

.section-alt {
  background: var(--light);
}

.section-title {
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: var(--dark);
}

.section-desc {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 48px;
  font-size: 17px;
  color: var(--gray);
  line-height: 1.8;
}

.section-note {
  text-align: center;
  font-size: 15px;
  color: var(--gray);
  margin-top: 32px;
}

/* === Cards === */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 16px;
}

.card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 2px 12px rgba(107,94,80,0.08);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(107,94,80,0.12);
}

.card-icon {
  color: var(--gold);
  margin-bottom: 16px;
}

.card h3 {
  font-size: 20px;
  margin-bottom: 8px;
  color: var(--dark);
}

.card p {
  font-size: 15px;
  color: var(--gray);
  line-height: 1.7;
}

/* === Token Economics === */
.token-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.token-table {
  width: 100%;
  border-collapse: collapse;
}

.token-table td {
  padding: 12px 16px;
  border-bottom: 1px solid #E5E7EB;
  font-size: 15px;
}

.token-table td:first-child {
  font-weight: 600;
  color: var(--dark);
  width: 40%;
}

.token-table td:last-child {
  color: var(--gray);
  font-family: var(--font-en);
}

/* Pie Chart */
.pie-chart {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: conic-gradient(
    var(--dark) 0deg 216deg,
    var(--gold) 216deg 270deg,
    var(--gold-dark) 270deg 324deg,
    var(--gold-light) 324deg 360deg
  );
  margin: 0 auto 24px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.pie-legend {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  flex-shrink: 0;
}

/* Supply Control */
.supply-control {
  margin-top: 48px;
}

.supply-control h3 {
  text-align: center;
  font-size: 22px;
  margin-bottom: 24px;
}

.control-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.control-card {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.control-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--gold);
}

.control-card p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
}

/* === Steps (How It Works) === */
.steps {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 16px;
}

.step {
  flex: 0 0 160px;
  text-align: center;
  padding: 16px;
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gold);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  font-family: var(--font-en);
  margin: 0 auto 12px;
}

.step h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.step p {
  font-size: 13px;
  color: var(--gray);
  line-height: 1.5;
}

.step-arrow {
  flex-shrink: 0;
  color: var(--gold);
  font-size: 24px;
  padding-top: 28px;
}

/* === Stats === */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
  text-align: center;
}

.stat-num {
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 4px;
}

.stat div:last-child {
  font-size: 14px;
  color: var(--gray);
}

/* === Timeline === */
.timeline {
  position: relative;
  padding-left: 40px;
  max-width: 700px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #E5E7EB;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-marker {
  position: absolute;
  left: -33px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #E5E7EB;
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px #E5E7EB;
}

.timeline-item.done .timeline-marker {
  background: var(--gold);
  box-shadow: 0 0 0 2px var(--gold);
}

.timeline-date {
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  margin-bottom: 4px;
}

.timeline-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.timeline-content ul {
  list-style: none;
  padding: 0;
}

.timeline-content li {
  font-size: 14px;
  color: var(--gray);
  padding: 2px 0;
  padding-left: 16px;
  position: relative;
}

.timeline-content li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 700;
}

/* === Contract === */
.contract-address {
  text-align: center;
  margin-bottom: 48px;
}

.contract-label {
  display: block;
  font-size: 14px;
  color: var(--gray);
  margin-bottom: 8px;
}

.contract-code {
  display: block;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 16px;
  color: var(--gray);
  background: var(--white);
  padding: 12px 24px;
  border-radius: 8px;
  margin-bottom: 12px;
}

.contract-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.feature {
  background: var(--white);
  border-radius: 12px;
  padding: 20px;
}

.feature strong {
  color: var(--dark);
  font-size: 16px;
  display: block;
  margin-bottom: 8px;
}

.feature p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.6;
}

.security {
  max-width: 600px;
  margin: 0 auto;
}

.security h3 {
  text-align: center;
  margin-bottom: 16px;
}

.security ul {
  list-style: none;
  padding: 0;
}

.security li {
  padding: 6px 0 6px 24px;
  position: relative;
  font-size: 15px;
  color: var(--gray);
}

.security li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 700;
}

/* === Team === */
.team-placeholder {
  text-align: center;
  color: var(--gray);
  margin-bottom: 32px;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.team-card {
  text-align: center;
  padding: 24px;
}

.placeholder-card {
  opacity: 0.4;
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: #E5E7EB;
  margin: 0 auto 12px;
}

.team-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.team-role {
  font-size: 14px;
  color: var(--gray);
}

/* === Community === */
.community-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.community-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  background: var(--white);
  color: var(--dark);
  text-decoration: none;
  font-size: 15px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: all 0.2s;
}

.community-link:hover:not(.disabled) {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.community-link.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.community-link svg {
  flex-shrink: 0;
}

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

.whitepaper-download h3 {
  margin-bottom: 12px;
}

.whitepaper-subtitle {
  margin: 0 auto 24px;
  max-width: 560px;
  color: var(--gray);
  font-size: 0.95rem;
  line-height: 1.6;
}

.download-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* === Footer === */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 24px 32px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
}

.footer-brand {
  font-family: var(--font-en);
  font-size: 18px;
  font-weight: 600;
  color: var(--gold);
}

.footer-disclaimer {
  max-width: 800px;
  margin: 0 auto 24px;
  font-size: 12px;
  line-height: 1.8;
  text-align: center;
  opacity: 0.7;
}

.footer-copy {
  text-align: center;
  font-size: 13px;
  font-family: var(--font-en);
  opacity: 0.5;
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
}

.animate-on-scroll.visible {
  animation: fadeInUp 0.3s ease-out forwards;
}

/* Fallback: if JS fails, show everything */
.no-js .animate-on-scroll {
  opacity: 1;
  transform: none;
}

/* === Responsive === */
@media (max-width: 768px) {
  .section {
    padding: 64px 16px;
  }

  .token-grid {
    grid-template-columns: 1fr;
  }

  .control-cards {
    grid-template-columns: 1fr;
  }

  .steps {
    flex-direction: column;
    align-items: center;
  }

  .step {
    flex: none;
    width: 100%;
    max-width: 300px;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding-top: 0;
    padding: 4px 0;
  }

  .hero-title {
    letter-spacing: 4px;
  }

  .pie-chart {
    width: 180px;
    height: 180px;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
  }

  .community-links {
    flex-direction: column;
    align-items: center;
  }

  .lang-nav {
    top: 12px;
    right: 12px;
  }
}