/* Reset */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: #e5e7eb;
  background-color: #020617;
}

.tm {
  font-size: 0.6em;
  vertical-align: super;
}

/* Header */
.site-header {
  background: rgba(2, 6, 23, 0.95);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav a {
  color: #9ca3af;
  text-decoration: none;
  margin-left: 18px;
  font-size: 0.95rem;
}

.site-nav a:hover,
.site-nav a.active {
  color: #facc15;
}

/* Hero */
.hero {
  height: 420px;               /* rho-earth style: not full screen */
  background-size: cover;
  background-position: center;
  position: relative;
}

.hero-overlay {
  height: 100%;
  background: linear-gradient(
    rgba(2,6,23,0.85),
    rgba(2,6,23,0.55)
  );
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 24px;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 300;
  margin-bottom: 16px;
}

.hero-subhead {
  max-width: 720px;
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 28px;
}

.cta-button {
  padding: 12px 28px;
  border: 1px solid #facc15;
  color: #facc15;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 500;
}

.cta-button:hover {
  background: #facc15;
  color: #111827;
}

/* Main Content */
.content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 64px 24px;
}

.intro {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 64px;
}

.three-column {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

.card h3 {
  margin-bottom: 12px;
  color: #f9fafb;
}

.card p {
  color: #cbd5e1;
  line-height: 1.6;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 32px 16px;
  font-size: 0.85rem;
  color: #94a3b8;
  border-top: 1px solid rgba(255,255,255,0.08);
}

/* Responsive */
@media (max-width: 720px) {
  .site-nav {
    display: none; /* we’ll add hamburger later */
  }

  .hero {
    height: 360px;
  }
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #e5e7eb;
  font-size: 1.6rem;
  cursor: pointer;
}

/* Make header a positioning anchor for the dropdown */
.site-header {
  position: relative;
}

/* Mobile Dropdown Menu (corporate style) */
.mobile-nav {
  position: absolute;
  top: 100%;          /* drops directly below header */
  left: 0;
  right: 0;

  background: rgba(2, 6, 23, 0.98);
  border-bottom: 1px solid rgba(255,255,255,0.08);

  display: none;
  padding: 14px 18px;
  z-index: 100;
}

.mobile-nav.open {
  display: block;
}

.mobile-nav nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 1200px;  /* align with header-inner */
  margin: 0 auto;
}

.mobile-nav a {
  color: #e5e7eb;
  font-size: 1.05rem;
  text-decoration: none;
  padding: 10px 10px;
  border-radius: 10px;
}

.mobile-nav a:hover {
  background: rgba(255,255,255,0.06);
  color: #facc15;
}

/* Responsive switch */
@media (max-width: 720px) {
  .site-nav {
    display: none;
  }

  .menu-toggle {
    display: block;
  }
}