/* ============================================================
   NEXUS AI PLATFORM — Global Stylesheet
   ============================================================ */

:root {
  --bg-primary:      #08080f;
  --bg-secondary:    #0d0d1c;
  --bg-card:         #111122;
  --bg-card-hover:   #161630;
  --accent-blue:     #3d8bff;
  --accent-blue-dim: rgba(61,139,255,0.15);
  --accent-gold:     #c9a96e;
  --accent-gold-dim: rgba(201,169,110,0.15);
  --text-primary:    #ffffff;
  --text-secondary:  #9090b0;
  --text-muted:      #555570;
  --border:          rgba(61,139,255,0.18);
  --border-gold:     rgba(201,169,110,0.25);
  --shadow-blue:     0 0 40px rgba(61,139,255,0.2);
  --shadow-gold:     0 0 30px rgba(201,169,110,0.15);
  --radius:          12px;
  --radius-lg:       20px;
  --transition:      0.3s cubic-bezier(0.4,0,0.2,1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── Typography ── */
h1,h2,h3,h4 { font-weight: 700; line-height: 1.3; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.4rem); }
p  { color: var(--text-secondary); }
a  { color: inherit; text-decoration: none; }

.en { font-family: 'Orbitron', 'Rajdhani', sans-serif; letter-spacing: 0.08em; }

/* ── Container ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ── Section ── */
.section { padding: 96px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-blue);
  border: 1px solid var(--border);
  background: var(--accent-blue-dim);
  padding: 4px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-title { margin-bottom: 16px; }
.section-title span { color: var(--accent-blue); }
.section-sub { font-size: 1rem; max-width: 560px; margin: 0 auto; }

/* ── Gradient text ── */
.grad-blue {
  background: linear-gradient(135deg, #6baeff, #3d8bff, #0057e0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.grad-gold {
  background: linear-gradient(135deg, #e8d08a, #c9a96e, #a07840);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, #3d8bff, #0055cc);
  color: #fff;
  box-shadow: 0 4px 20px rgba(61,139,255,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(61,139,255,0.55); }
.btn-gold {
  background: linear-gradient(135deg, #e0c07a, #c9a96e, #a07840);
  color: #0a0a0f;
  box-shadow: 0 4px 20px rgba(201,169,110,0.35);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(201,169,110,0.5); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--accent-blue); color: var(--accent-blue); background: var(--accent-blue-dim); }
.btn-line {
  background: #06c755;
  color: #fff;
  box-shadow: 0 4px 20px rgba(6,199,85,0.35);
}
.btn-line:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(6,199,85,0.5); }
.btn-lg { padding: 18px 44px; font-size: 1.05rem; border-radius: 10px; }

/* ── Card ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: var(--transition);
}
.card:hover {
  border-color: rgba(61,139,255,0.4);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-blue);
}

/* ── Icon circle ── */
.icon-circle {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  background: var(--accent-blue-dim);
  border: 1px solid var(--border);
}

/* ── Nav ── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  transition: var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(8,8,15,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}
.nav-logo .logo-icon { width: 36px; height: 36px; }
.nav-logo .logo-sub { font-size: 0.6rem; color: var(--accent-gold); letter-spacing: 0.25em; display: block; line-height: 1; margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 0.88rem; font-weight: 500; color: var(--text-secondary); transition: var(--transition); letter-spacing: 0.05em; }
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-cta { display: flex; gap: 12px; align-items: center; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

/* ── Footer ── */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.footer-brand .logo-text { font-size: 1.4rem; font-weight: 900; letter-spacing: 0.1em; margin-bottom: 8px; display: block; }
.footer-brand .logo-sub-text { font-size: 0.7rem; color: var(--accent-gold); letter-spacing: 0.25em; display: block; margin-bottom: 16px; }
.footer-brand p { font-size: 0.88rem; max-width: 280px; }
.footer-links h4 { font-size: 0.8rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent-blue); margin-bottom: 20px; }
.footer-links ul { list-style: none; }
.footer-links ul li { margin-bottom: 12px; }
.footer-links ul li a { font-size: 0.9rem; color: var(--text-secondary); transition: var(--transition); }
.footer-links ul li a:hover { color: var(--text-primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 0.8rem; color: var(--text-muted); }
.fuya-badge {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.8rem; color: var(--text-muted);
}
.fuya-badge .moon { font-size: 1.1rem; }

/* ── Hero ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 72px;
}
#networkCanvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.45;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-gold);
  border: 1px solid var(--border-gold);
  background: var(--accent-gold-dim);
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 28px;
}
.hero-tag::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-gold); animation: pulse 2s infinite; }
.hero h1 { margin-bottom: 24px; }
.hero p.lead {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 40px;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.stat-item .num {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 6px;
  background: linear-gradient(135deg, #6baeff, #3d8bff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-item .label { font-size: 0.82rem; color: var(--text-muted); letter-spacing: 0.05em; }
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
  animation: bounce 2s infinite;
}
.hero-scroll .arrow { font-size: 1.2rem; color: var(--accent-blue); }

/* ── Animations ── */
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50%      { opacity:0.5; transform:scale(1.4); }
}
@keyframes bounce {
  0%,100% { transform:translateX(-50%) translateY(0); }
  50%      { transform:translateX(-50%) translateY(8px); }
}
@keyframes fadeUp {
  from { opacity:0; transform:translateY(30px); }
  to   { opacity:1; transform:translateY(0); }
}
.fade-up { opacity:0; animation: fadeUp 0.7s ease forwards; }
.fade-up.delay-1 { animation-delay: 0.1s; }
.fade-up.delay-2 { animation-delay: 0.2s; }
.fade-up.delay-3 { animation-delay: 0.3s; }

/* ── Grid layouts ── */
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 28px; }
.grid-2-1 { display: grid; grid-template-columns: 3fr 2fr; gap: 64px; align-items: center; }

/* ── Service cards ── */
.service-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent-blue-dim);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.service-num-gold { color: var(--accent-gold-dim); }

/* ── Pricing ── */
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  transition: var(--transition);
}
.pricing-card.featured {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-blue);
}
.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-blue);
  border-color: rgba(61,139,255,0.5);
}
.badge-popular {
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #3d8bff, #0055cc);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 4px 20px;
  border-radius: 100px;
}
.price { font-size: 2.6rem; font-weight: 900; line-height: 1; }
.price sub { font-size: 0.9rem; font-weight: 400; color: var(--text-secondary); vertical-align: bottom; }
.price span { font-size: 1rem; color: var(--text-secondary); }
.plan-feature { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: 0.9rem; color: var(--text-secondary); }
.plan-feature .check { color: var(--accent-blue); flex-shrink: 0; margin-top: 2px; }
.plan-name { font-size: 0.75rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent-blue); margin-bottom: 12px; }

/* ── Flow steps ── */
.flow-steps { display: flex; flex-direction: column; gap: 0; }
.flow-step {
  display: flex;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.flow-step:last-child { border-bottom: none; }
.step-num {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--accent-blue-dim);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 900;
  font-size: 0.9rem;
  color: var(--accent-blue);
  flex-shrink: 0;
}
.step-content h4 { margin-bottom: 6px; font-size: 1rem; }
.step-content p { font-size: 0.88rem; }

/* ── FAQ ── */
.faq-item {
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  gap: 16px;
  transition: var(--transition);
}
.faq-q:hover { color: var(--accent-blue); }
.faq-icon { font-size: 1.2rem; color: var(--accent-blue); transition: var(--transition); flex-shrink: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s; }
.faq-a.open { max-height: 200px; padding-bottom: 20px; }
.faq-a p { font-size: 0.9rem; }

/* ── CTA Banner ── */
.cta-banner {
  background: linear-gradient(135deg, rgba(61,139,255,0.12), rgba(201,169,110,0.08));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61,139,255,0.15), transparent 70%);
}
.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -60px; left: -60px;
  width: 240px; height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201,169,110,0.1), transparent 70%);
}
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }

/* ── Form ── */
.form-group { margin-bottom: 24px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 8px; color: var(--text-secondary); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(61,139,255,0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* ── About page ── */
.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}
.profile-avatar {
  width: 120px; height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3d8bff22, #c9a96e22);
  border: 2px solid var(--border-gold);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  font-size: 2.5rem;
}
.profile-title { font-size: 0.78rem; color: var(--accent-gold); letter-spacing: 0.2em; margin-bottom: 6px; }
.profile-name { font-size: 1.6rem; font-weight: 900; }

/* ── Values ── */
.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.value-card:hover { border-color: rgba(201,169,110,0.4); }
.value-num { font-size: 0.72rem; letter-spacing: 0.2em; color: var(--accent-gold); margin-bottom: 10px; }

/* ── Page hero (inner pages) ── */
.page-hero {
  padding: 140px 0 64px;
  text-align: center;
  background: linear-gradient(180deg, rgba(61,139,255,0.06) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
}
.page-hero .section-tag { margin-bottom: 20px; }
.page-hero h1 { margin-bottom: 16px; }
.page-hero p { max-width: 500px; margin: 0 auto; }

/* ── Thank you ── */
.thanks-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 96px 24px;
}
.thanks-icon { font-size: 4rem; margin-bottom: 24px; }
.thanks-wrap h1 { margin-bottom: 16px; }
.thanks-wrap p { max-width: 440px; margin: 0 auto 36px; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-2-1 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .hero-stats { gap: 24px; }
  .cta-banner { padding: 40px 24px; }
}
@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .hero-cta { flex-direction: column; }
  .cta-btns { flex-direction: column; align-items: center; }
}

/* ── Mobile nav ── */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(8,8,15,0.97);
  backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.mobile-nav.open { opacity: 1; pointer-events: all; }
.mobile-nav a { font-size: 1.4rem; font-weight: 700; color: var(--text-secondary); }
.mobile-nav a:hover { color: var(--text-primary); }
.mobile-nav-close { position: absolute; top: 24px; right: 24px; font-size: 1.8rem; cursor: pointer; color: var(--text-secondary); }

/* ── Divider ── */
.divider { width: 48px; height: 3px; background: linear-gradient(90deg, var(--accent-blue), transparent); margin: 20px 0; border-radius: 2px; }
.divider-center { margin: 20px auto; }