/* ── NiteBot Website — Shared Styles ─────────────────────────────────── */
:root {
  --navy:      #0a1628;
  --navy2:     #0f2040;
  --navy3:     #162d50;
  --cyan:      #00d4ff;
  --cyan-dim:  #0099bb;
  --cyan-bg:   rgba(0,212,255,0.08);
  --cyan-glow: rgba(0,212,255,0.25);
  --white:     #ffffff;
  --silver:    #b0c8d8;
  --muted:     #607a8a;
  --border:    rgba(0,212,255,0.18);
  --card:      rgba(255,255,255,0.04);
  --radius:    14px;
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--navy);
  color: var(--white);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Star Canvas ─────────────────────────────────────────────────────── */
#stars {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ── All page content above stars ────────────────────────────────────── */
nav, main, footer, section { position: relative; z-index: 1; }

/* ── Navbar ──────────────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,22,40,0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  height: 64px;
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--white);
  text-decoration: none;
}
.nav-logo span { color: var(--cyan); }

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
  align-items: center;
}
.nav-links a {
  color: var(--silver);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--cyan);
  background: var(--cyan-bg);
}
.nav-cta {
  background: var(--cyan) !important;
  color: var(--navy) !important;
  font-weight: 700;
  padding: 8px 20px !important;
}
.nav-cta:hover { background: #00bde0 !important; }

.hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--cyan);
  font-size: 1.4rem;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
}

/* ── Sections ─────────────────────────────────────────────────────────── */
main { padding-top: 64px; }

section {
  padding: 80px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.section-full {
  max-width: 100%;
  padding-left: 0;
  padding-right: 0;
}

/* ── Labels ──────────────────────────────────────────────────────────── */
.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 30px;
  margin-bottom: 18px;
}

/* ── Headings ────────────────────────────────────────────────────────── */
.heading-jp {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--white);
}
.heading-en {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  color: var(--muted);
  margin-top: 6px;
}
.cyan { color: var(--cyan); }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: none;
}
.btn-primary {
  background: var(--cyan);
  color: var(--navy);
}
.btn-primary:hover { background: #00bde0; transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--cyan);
  border: 1.5px solid var(--cyan);
}
.btn-outline:hover { background: var(--cyan-bg); transform: translateY(-2px); }

/* ── Cards ───────────────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.card:hover { border-color: var(--cyan); transform: translateY(-3px); }

/* ── Grid helpers ────────────────────────────────────────────────────── */
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }

/* ── Divider ─────────────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
  margin: 0 24px;
}

/* ── Footer ──────────────────────────────────────────────────────────── */
footer {
  background: rgba(0,0,0,0.35);
  border-top: 1px solid var(--border);
  padding: 48px 24px 32px;
  position: relative;
  z-index: 1;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}
.footer-logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--white);
}
.footer-logo span { color: var(--cyan); }
.footer-tagline {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 8px;
  line-height: 1.6;
}
.footer-heading {
  font-size: 0.8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 14px;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: var(--silver);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--cyan); }
.footer-bottom {
  max-width: 1100px;
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--muted);
}

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hamburger { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(10,22,40,0.97);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; font-size: 1rem; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  section { padding: 60px 20px; }
}
@media (max-width: 480px) {
  .btn { padding: 12px 24px; font-size: 0.95rem; }
}