/* ============================================================
   NXS NIGANA — Design Tokens
   ============================================================ */
:root {
  --bg-primary: #0B0E14;
  --bg-secondary: #121727;
  --bg-tertiary: #1A2033;
  --border-subtle: #232A3D;

  --text-primary: #F5F3EF;
  --text-secondary: #9BA3B7;
  --text-muted: #6B7280;

  --accent: #6E7BFF;
  --accent-hover: #5A65E0;
  --accent-soft: rgba(110, 123, 255, 0.14);
  --accent-2: #B4A0FF;

  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

::selection { background: var(--accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 16px;
}

.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-head {
  max-width: 640px;
  margin-bottom: 64px;
}

.section-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin-bottom: 16px;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 17px;
}

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

/* ============================================================
   Reveal animation
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
[data-reveal="stagger"] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
[data-reveal="stagger"].is-visible > * { opacity: 1; transform: translateY(0); }
[data-reveal="stagger"].is-visible > *:nth-child(1) { transition-delay: 0.05s; }
[data-reveal="stagger"].is-visible > *:nth-child(2) { transition-delay: 0.12s; }
[data-reveal="stagger"].is-visible > *:nth-child(3) { transition-delay: 0.19s; }
[data-reveal="stagger"].is-visible > *:nth-child(4) { transition-delay: 0.26s; }
[data-reveal="stagger"].is-visible > *:nth-child(5) { transition-delay: 0.33s; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); }
.btn-ghost {
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}
.btn-ghost:hover { border-color: var(--accent); transform: translateY(-2px); }

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 22px 0;
  transition: background 0.3s var(--ease), padding 0.3s var(--ease), border-color 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 14px 0;
  border-bottom: 1px solid var(--border-subtle);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
}
.brand img { width: 30px; height: 30px; }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-menu a {
  font-size: 14.5px;
  color: var(--text-secondary);
  transition: color 0.2s var(--ease);
  position: relative;
}
.nav-menu a:hover, .nav-menu a.is-active { color: var(--text-primary); }
.nav-menu a.is-active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.nav-cta { display: flex; align-items: center; gap: 24px; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  position: relative;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 58px);
  margin-bottom: 22px;
}
.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-glow {
  position: absolute;
  width: 480px; height: 480px;
  background: radial-gradient(circle, var(--accent-soft) 0%, transparent 70%);
  filter: blur(10px);
  animation: pulse-glow 6s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.06); }
}
.hero-illustration { position: relative; width: 100%; max-width: 460px; }
.visor { animation: visor-pulse 3.2s ease-in-out infinite; }
@keyframes visor-pulse {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; }
}
.float-slow { animation: float 7s ease-in-out infinite; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ============================================================
   About / Vision-Mission
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}
.vm-block h3 {
  font-size: 15px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  margin-bottom: 14px;
}
.vm-block p { color: var(--text-secondary); font-size: 16.5px; }
.vm-block .vision-text {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.45;
}
.mission-list { display: flex; flex-direction: column; gap: 18px; }
.mission-list li {
  display: flex;
  gap: 14px;
  color: var(--text-secondary);
  font-size: 16px;
}
.mission-list .num {
  font-family: var(--font-mono);
  color: var(--accent);
  flex-shrink: 0;
}
.name-note {
  margin-top: 56px;
  padding: 24px 28px;
  border-left: 2px solid var(--accent);
  background: var(--bg-tertiary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-size: 15px;
  font-style: italic;
}

/* ============================================================
   Services
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--text-secondary); font-size: 14.5px; }

.card-featured {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 20px;
  align-items: start;
  background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
  border-color: var(--accent);
}
.card-featured .card-icon { margin-bottom: 0; }
.card-featured-body h3 {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  font-size: 20px; margin-bottom: 10px;
}
.badge {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--accent);
  color: #fff;
  padding: 4px 10px;
  border-radius: 20px;
}
.card-featured p { color: var(--text-secondary); font-size: 15px; max-width: 640px; }

/* ============================================================
   Technology / NG Series
   ============================================================ */
.tech-intro {
  max-width: 680px;
  color: var(--text-secondary);
  font-size: 17px;
  margin-bottom: 56px;
}
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.tier-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  background: var(--bg-primary);
}
.tier-card .tier-name {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--accent-2);
  margin-bottom: 10px;
}
.tier-card p { color: var(--text-secondary); font-size: 14.5px; }
.tier-card.tier-hi { border-color: var(--accent); }

/* ============================================================
   Why section
   ============================================================ */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.why-item { border-top: 1px solid var(--border-subtle); padding-top: 24px; }
.why-item .why-num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 14px;
  margin-bottom: 12px;
  display: block;
}
.why-item p { color: var(--text-secondary); font-size: 15.5px; }

/* ============================================================
   Contact
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: start;
}
.contact-info h2 { font-size: clamp(28px, 3.4vw, 40px); margin-bottom: 18px; }
.contact-info p { color: var(--text-secondary); font-size: 16.5px; margin-bottom: 28px; }
.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  color: var(--accent-2);
  font-size: 15px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-subtle);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 13.5px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.form-group input, .form-group textarea {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color 0.25s var(--ease);
}
.form-group input:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.hp-field { position: absolute; left: -9999px; }
#form-status {
  margin-top: 16px;
  font-size: 14px;
  min-height: 20px;
}
#form-status.is-success { color: #7ED9A8; }
#form-status.is-error { color: #E27878; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p {
  color: var(--text-secondary);
  font-size: 14.5px;
  max-width: 280px;
  margin-bottom: 20px;
}
.footer-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  padding: 5px 12px;
  border-radius: 20px;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 18px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col a, .footer-col span {
  color: var(--text-secondary);
  font-size: 14.5px;
  transition: color 0.2s var(--ease);
}
.footer-col a:hover { color: var(--accent-2); }
.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13.5px;
  color: var(--text-muted);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 340px; margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .card-featured { grid-column: span 2; }
  .tier-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .section { padding: 80px 0; }
  .nav-menu {
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 20px;
    gap: 20px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
  }
  .nav-menu.is-open { opacity: 1; transform: translateY(0); visibility: visible; }
  .nav-cta .btn-ghost { display: none; }
  .nav-toggle { display: flex; }
  .services-grid { grid-template-columns: 1fr; }
  .card-featured { grid-column: span 1; grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}