/* ============================================
   VIACI Corporate Website
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
  /* Brand Colors */
  --color-robotics: #3b82f6;
  --color-ai: #8b5cf6;
  --color-security: #10b981;
  --color-gold: #eab308;
  --color-text: #1e40af;
  
  /* Neutral Colors */
  --primary-dark: #0f172a;
  --primary: #1e3a5f;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* Fonts */
  --font-ja: 'Noto Sans JP', 'Hiragino Sans', 'Meiryo', sans-serif;
  --font-en: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing */
  --section-padding: clamp(60px, 10vw, 120px);
  --container-width: 1280px;
  --container-padding: clamp(20px, 5vw, 40px);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-en); line-height: 1.7; color: var(--gray-700); background: var(--white); overflow-x: hidden; }
body.ja { font-family: var(--font-ja); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition-base); }
ul, ol { list-style: none; }

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

h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--gray-900); }

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
  color: var(--color-text);
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-robotics), var(--color-ai), var(--color-security));
  margin-top: 1rem;
  border-radius: 2px;
}
.section-title.center { text-align: center; }
.section-title.center::after { margin-left: auto; margin-right: auto; }
.section-subtitle { font-size: 1.125rem; color: var(--gray-500); max-width: 600px; }
.section-subtitle.center { margin-left: auto; margin-right: auto; text-align: center; }

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: var(--transition-base);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }

.logo { display: flex; align-items: center; }
.logo img { height: 60px; width: auto; }

.nav-menu { display: flex; align-items: center; gap: 2rem; }
.nav-link { font-weight: 500; color: var(--gray-600); position: relative; padding: 0.5rem 0; }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-gold);
  transition: var(--transition-base);
}
.nav-link:hover { color: var(--color-text); }
.nav-link:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 1rem; }
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  background: var(--white);
  cursor: pointer;
  transition: var(--transition-base);
}
.lang-switch:hover { border-color: var(--color-gold); color: var(--color-text); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-robotics), var(--color-ai));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4); }
.btn-outline { background: transparent; border: 2px solid var(--gray-200); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--color-gold); color: var(--color-text); }
.btn-white { background: rgba(255,255,255,0.15); border: 2px solid rgba(255,255,255,0.4); color: white; }
.btn-white:hover { background: rgba(255,255,255,0.25); }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 10px; background: none; border: none; cursor: pointer; }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--gray-700); transition: var(--transition-base); }

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  overflow: hidden;
  padding-top: 80px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 10; display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.hero-text { color: var(--white); }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}
.hero-badge-dot { width: 8px; height: 8px; background: var(--color-gold); border-radius: 50%; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.2); } }
.hero-title { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; line-height: 1.15; margin-bottom: 1.5rem; color: var(--white); }
.hero-title .highlight {
  background: linear-gradient(90deg, var(--color-robotics), var(--color-ai), var(--color-security));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-description { font-size: 1.125rem; line-height: 1.8; opacity: 0.9; margin-bottom: 2rem; max-width: 500px; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.hero-image-container { position: relative; width: 100%; max-width: 500px; }
.hero-image { width: 100%; border-radius: 20px; box-shadow: var(--shadow-xl); }
.hero-float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: float 3s ease-in-out infinite;
}
.hero-float-card.card-1 { top: 10%; right: -30px; animation-delay: 0s; }
.hero-float-card.card-2 { bottom: 20%; left: -30px; animation-delay: 1s; }
.hero-float-card.card-3 { bottom: -10%; right: 10%; animation-delay: 2s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.float-icon { width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; color: white; }
.float-icon.robotics { background: var(--color-robotics); }
.float-icon.ai { background: var(--color-ai); }
.float-icon.security { background: var(--color-security); }
.float-text { font-size: 0.75rem; color: var(--gray-500); }
.float-text strong { display: block; font-size: 0.875rem; color: var(--gray-800); }

/* Services */
.services { padding: var(--section-padding) 0; background: var(--gray-50); position: relative; }
.services-header { text-align: center; margin-bottom: 4rem; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.service-card {
  background: var(--white);
  border-radius: 20px;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition-base);
  border: 1px solid var(--gray-100);
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition-base);
}
.service-card.robotics::before { background: var(--color-robotics); }
.service-card.ai::before { background: var(--color-ai); }
.service-card.security::before { background: var(--color-security); }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-xl); }
.service-card:hover::before { transform: scaleX(1); }
.service-icon { width: 64px; height: 64px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.75rem; margin-bottom: 1.5rem; }
.service-icon.robotics { background: rgba(59, 130, 246, 0.15); color: var(--color-robotics); }
.service-icon.ai { background: rgba(139, 92, 246, 0.15); color: var(--color-ai); }
.service-icon.security { background: rgba(16, 185, 129, 0.15); color: var(--color-security); }
.service-card h3 { font-size: 1.375rem; margin-bottom: 1rem; color: var(--color-text); }
.service-card p { color: var(--gray-500); margin-bottom: 1.5rem; line-height: 1.7; }
.service-link { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 600; color: var(--color-text); }
.service-link svg { transition: var(--transition-base); }
.service-link:hover svg { transform: translateX(4px); }

/* Partners */
.partners { padding: var(--section-padding) 0; background: var(--white); }
.partners-header { text-align: center; margin-bottom: 4rem; }
.partners-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.partner-card {
  background: var(--gray-50);
  border-radius: 16px;
  padding: 2rem;
  text-align: center;
  transition: var(--transition-base);
  border: 1px solid transparent;
}
.partner-card:hover { background: var(--white); border-color: var(--gray-200); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.partner-logo { height: 60px; display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; }
.partner-logo img { max-height: 100%; max-width: 180px; object-fit: contain; filter: grayscale(100%); opacity: 0.7; transition: var(--transition-base); }
.partner-card:hover .partner-logo img { filter: grayscale(0%); opacity: 1; }
.partner-name { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--color-text); }
.partner-category { font-size: 0.875rem; color: var(--gray-500); margin-bottom: 1rem; }
.partner-link { display: inline-flex; align-items: center; gap: 0.25rem; font-size: 0.875rem; color: var(--color-gold); font-weight: 500; }
.partner-link:hover { text-decoration: underline; }

/* About */
.about {
  padding: var(--section-padding) 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.about::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 90% 10%, rgba(59, 130, 246, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(139, 92, 246, 0.1) 0%, transparent 40%);
  pointer-events: none;
}
.about-content { position: relative; z-index: 10; display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.about-text .section-title { color: var(--white); }
.about-text .section-title::after { background: var(--color-gold); }
.about-description { font-size: 1.125rem; line-height: 1.8; opacity: 0.9; margin-bottom: 2rem; }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.stat-item {
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.stat-number { font-size: 2.5rem; font-weight: 700; color: var(--color-gold); margin-bottom: 0.5rem; }
.stat-label { font-size: 0.875rem; opacity: 0.8; }

/* Contact */
.contact { padding: var(--section-padding) 0; background: var(--gray-50); }
.contact-header { text-align: center; margin-bottom: 4rem; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; }
.contact-info h3 { font-size: 1.5rem; margin-bottom: 1.5rem; color: var(--color-text); }
.contact-info p { color: var(--gray-600); margin-bottom: 2rem; line-height: 1.8; }
.contact-details { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-item { display: flex; align-items: flex-start; gap: 1rem; }
.contact-item-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-robotics), var(--color-ai));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  flex-shrink: 0;
}
.contact-item-text strong { display: block; margin-bottom: 0.25rem; color: var(--color-text); }
.contact-item-text span { color: var(--gray-500); font-size: 0.9375rem; }
.contact-form { background: var(--white); border-radius: 20px; padding: 2.5rem; box-shadow: var(--shadow-lg); }
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; font-weight: 500; margin-bottom: 0.5rem; color: var(--gray-700); }
.form-input, .form-textarea {
  width: 100%;
  padding: 1rem 1.25rem;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition-base);
  background: var(--gray-50);
}
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--color-robotics); background: var(--white); box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1); }
.form-textarea { min-height: 150px; resize: vertical; }
.btn-submit { width: 100%; padding: 1rem; font-size: 1rem; }

/* Footer */
.footer { background: var(--gray-900); color: var(--gray-400); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand .logo img { height: 50px; }
.footer-brand p { line-height: 1.7; margin-bottom: 1.5rem; }
.social-links { display: flex; gap: 1rem; }
.social-link {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--gray-800);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  transition: var(--transition-base);
}
.social-link:hover { background: var(--color-gold); color: var(--white); }
.footer-column h4 { color: var(--white); font-size: 1rem; margin-bottom: 1.5rem; }
.footer-links { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-links a { color: var(--gray-400); font-size: 0.9375rem; }
.footer-links a:hover { color: var(--color-gold); }
.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
}
.footer-bottom-links { display: flex; gap: 2rem; }
.footer-bottom-links a:hover { color: var(--color-gold); }

/* Animations */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.active { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-text { order: 1; }
  .hero-visual { order: 2; }
  .hero-description { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .services-grid { grid-template-columns: 1fr; }
  .about-content { grid-template-columns: 1fr; text-align: center; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; position: absolute; top: 80px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 1rem; box-shadow: var(--shadow-lg); }
  .nav-menu.active { display: flex; }
  .mobile-menu-btn { display: flex; }
  .hero-float-card { display: none; }
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  .social-links { justify-content: center; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr; }
  .nav-actions .btn-primary { display: none; }
}