/* Nexum Systems — Static site styles */
:root {
  --background: #0b1020;
  --foreground: #f4f6fb;
  --card: #131a32;
  --card-foreground: #f4f6fb;
  --muted: #1a2240;
  --muted-foreground: #9aa5c9;
  --border: rgba(255, 255, 255, 0.08);
  --input: rgba(255, 255, 255, 0.12);
  --primary: #3b4fb3;
  --primary-foreground: #ffffff;
  --accent: #6f8cff;
  --accent-foreground: #0b1020;
  --destructive: #ef4444;
  --grid: rgba(255, 255, 255, 0.06);
  --gradient-hero: radial-gradient(ellipse at top, rgba(111, 140, 255, 0.22), transparent 60%),
    linear-gradient(180deg, var(--background), #060a1a);
  --gradient-accent: linear-gradient(135deg, #3b4fb3, #6f8cff);
  --shadow-glow: 0 10px 50px -10px rgba(111, 140, 255, 0.5);
  --radius: 0.5rem;
  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
* { border-color: var(--border); }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}
h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; }

/* Layout */
.site { display: flex; min-height: 100vh; flex-direction: column; }
.container { max-width: 80rem; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .container { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .container { padding: 0 2rem; } }

main { flex: 1; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 16, 32, 0.7);
  backdrop-filter: blur(14px);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 4rem;
}
.brand { display: flex; align-items: center; gap: 0.5rem; }
.brand img { height: 2.25rem; width: auto; }
.nav { display: none; align-items: center; gap: 0.25rem; }
@media (min-width: 768px) { .nav { display: flex; } }
.nav a {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem; font-weight: 500;
  color: var(--muted-foreground);
  border-radius: 0.375rem;
  transition: color 0.15s;
}
.nav a:hover, .nav a.active { color: var(--foreground); }
.nav .cta {
  margin-left: 0.5rem;
  background: var(--gradient-accent);
  color: var(--primary-foreground);
  padding: 0.5rem 1rem;
  font-weight: 600;
  box-shadow: var(--shadow-glow);
  transition: transform 0.15s;
}
.nav .cta:hover { transform: translateY(-2px); color: var(--primary-foreground); }

.menu-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.5rem; background: transparent; border: 0; color: var(--foreground);
  border-radius: 0.375rem;
}
@media (min-width: 768px) { .menu-toggle { display: none; } }
.menu-toggle svg { width: 1.25rem; height: 1.25rem; }

.mobile-nav { display: none; border-top: 1px solid var(--border); background: var(--background); }
.mobile-nav.open { display: block; }
.mobile-nav .container { display: flex; flex-direction: column; gap: 0.25rem; padding-top: 0.75rem; padding-bottom: 0.75rem; }
.mobile-nav a {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem; font-weight: 500;
  color: var(--muted-foreground);
  border-radius: 0.375rem;
}
.mobile-nav a:hover, .mobile-nav a.active { background: var(--muted); color: var(--foreground); }

/* Footer */
.footer { border-top: 1px solid var(--border); background: var(--background); }
.footer-grid {
  display: grid; gap: 2.5rem; padding: 3.5rem 0;
}
@media (min-width: 768px) { .footer-grid { grid-template-columns: repeat(4, 1fr); } }
.footer-brand { grid-column: span 1; }
@media (min-width: 768px) { .footer-brand { grid-column: span 2; } }
.footer-brand img { height: 2.5rem; width: auto; }
.footer-brand p { margin-top: 1rem; max-width: 24rem; font-size: 0.875rem; color: var(--muted-foreground); }
.footer h4 { font-size: 0.875rem; font-weight: 600; color: var(--foreground); }
.footer ul { margin-top: 0.75rem; display: flex; flex-direction: column; gap: 0.5rem; font-size: 0.875rem; color: var(--muted-foreground); }
.footer a:hover { color: var(--foreground); }
.footer-bottom { border-top: 1px solid var(--border); }
.footer-bottom .container { padding-top: 1.25rem; padding-bottom: 1.25rem; font-size: 0.75rem; color: var(--muted-foreground); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 0.375rem;
  font-size: 0.875rem; font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s, background 0.15s, color 0.15s;
}
.btn-primary { background: var(--gradient-accent); color: var(--primary-foreground); box-shadow: var(--shadow-glow); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-outline { background: rgba(19, 26, 50, 0.6); color: var(--foreground); border-color: var(--border); backdrop-filter: blur(8px); }
.btn-outline:hover { background: var(--card); }
.btn-light { background: var(--foreground); color: var(--background); }
.btn-light:hover { background: #e2e8f0; }
.btn svg { width: 1rem; height: 1rem; }

/* Hero */
.hero { position: relative; overflow: hidden; background: var(--gradient-hero); }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
  opacity: 0.6;
}
.hero-content { position: relative; padding: 5rem 0; }
@media (min-width: 640px) { .hero-content { padding: 8rem 0; } }
@media (min-width: 1024px) { .hero-content { padding: 10rem 0; } }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border);
  background: rgba(19, 26, 50, 0.6);
  border-radius: 9999px;
  font-size: 0.75rem; font-weight: 500;
  color: var(--muted-foreground);
  backdrop-filter: blur(8px);
}
.eyebrow .dot { width: 0.375rem; height: 0.375rem; border-radius: 9999px; background: var(--accent); }

.hero h1 { margin-top: 1.5rem; font-size: 2.25rem; font-weight: 700; line-height: 1.1; max-width: 48rem; }
@media (min-width: 640px) { .hero h1 { font-size: 3rem; } }
@media (min-width: 1024px) { .hero h1 { font-size: 3.75rem; } }
.hero p.lead { margin-top: 1.5rem; max-width: 42rem; font-size: 1.125rem; color: var(--muted-foreground); }
.hero-cta { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }

.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Page hero (smaller) */
.page-hero { background: var(--gradient-hero); }
.page-hero .container { padding-top: 5rem; padding-bottom: 5rem; }
.page-hero h1 { font-size: 2.25rem; font-weight: 700; }
@media (min-width: 640px) { .page-hero h1 { font-size: 3rem; } }
.page-hero p { margin-top: 1rem; max-width: 48rem; font-size: 1.125rem; color: var(--muted-foreground); }

/* Sections */
.section { padding: 5rem 0; }
.section-tight { padding: 4rem 0; }
.section-divider { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(19, 26, 50, 0.3); }
.section-top-border { border-top: 1px solid var(--border); background: rgba(19, 26, 50, 0.3); }
.section-head { max-width: 36rem; margin: 0 auto; text-align: center; }
.section-head h2 { font-size: 1.875rem; font-weight: 700; }
@media (min-width: 640px) { .section-head h2 { font-size: 2.25rem; } }
.section-head p { margin-top: 0.75rem; color: var(--muted-foreground); }

/* Stats */
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; padding: 2.5rem 0; }
@media (min-width: 768px) { .stats-grid { grid-template-columns: repeat(4, 1fr); } }
.stat .k { font-family: var(--font-display); font-size: 1.875rem; font-weight: 700; }
@media (min-width: 640px) { .stat .k { font-size: 2.25rem; } }
.stat .v { margin-top: 0.25rem; font-size: 0.875rem; color: var(--muted-foreground); }

/* Cards grid */
.cards { display: grid; gap: 1.5rem; margin-top: 3rem; }
@media (min-width: 640px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .cards.cols-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .cards.cols-4 { grid-template-columns: repeat(4, 1fr); } }
.card {
  border: 1px solid var(--border); background: var(--card);
  border-radius: 0.75rem; padding: 1.5rem;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.card:hover { transform: translateY(-4px); border-color: rgba(111, 140, 255, 0.5); box-shadow: var(--shadow-glow); }
.icon-box {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem;
  border-radius: 0.5rem;
  background: var(--gradient-accent);
  color: var(--primary-foreground);
}
.icon-box svg { width: 1.25rem; height: 1.25rem; }
.card h3 { margin-top: 1.25rem; font-size: 1rem; font-weight: 600; }
.cards.cols-3 .card h3 { font-size: 1.125rem; }
.card p { margin-top: 0.5rem; font-size: 0.875rem; color: var(--muted-foreground); }
.card ul { margin-top: 1rem; display: flex; flex-direction: column; gap: 0.5rem; font-size: 0.875rem; color: var(--muted-foreground); }
.card ul li { display: flex; gap: 0.5rem; }
.card ul li::before { content: ""; flex: 0 0 0.25rem; height: 0.25rem; margin-top: 0.5rem; border-radius: 9999px; background: var(--accent); }

/* Two-col about block */
.about-grid { display: grid; gap: 3rem; padding: 5rem 0; }
@media (min-width: 1024px) { .about-grid { grid-template-columns: 2fr 3fr; gap: 4rem; } }
.about-text h2 { margin-top: 1rem; font-size: 1.875rem; font-weight: 700; }
@media (min-width: 640px) { .about-text h2 { font-size: 2.25rem; } }
.about-text p { margin-top: 1rem; color: var(--muted-foreground); }
.about-link { margin-top: 1.5rem; display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; font-weight: 600; color: var(--accent); }
.about-link:hover { gap: 0.75rem; }
.about-list { display: grid; gap: 1rem; }
@media (min-width: 640px) { .about-list { grid-template-columns: repeat(2, 1fr); } }
.about-item {
  border: 1px solid var(--border); background: var(--card);
  border-radius: 0.75rem; padding: 1.25rem;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.about-item:hover { transform: translateY(-4px); border-color: rgba(111, 140, 255, 0.5); box-shadow: var(--shadow-glow); }
.about-item-inner { display: flex; gap: 0.75rem; align-items: flex-start; }
.about-item svg.check { color: var(--accent); width: 1.25rem; height: 1.25rem; flex-shrink: 0; margin-top: 0.125rem; }
.about-item h3 { font-size: 0.875rem; font-weight: 600; }
.about-item p { margin-top: 0.25rem; font-size: 0.875rem; color: var(--muted-foreground); }

/* CTA */
.cta-block {
  position: relative; overflow: hidden;
  border-radius: 1rem; border: 1px solid var(--border);
  background: var(--gradient-accent);
  padding: 2.5rem; text-align: center;
}
@media (min-width: 640px) { .cta-block { padding: 4rem; } }
.cta-block h2 { font-size: 1.875rem; font-weight: 700; color: var(--primary-foreground); }
@media (min-width: 640px) { .cta-block h2 { font-size: 2.25rem; } }
.cta-block p { margin: 0.75rem auto 0; max-width: 42rem; color: rgba(255, 255, 255, 0.85); }
.cta-block .btn { margin-top: 2rem; }

/* Partners */
.partners-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; margin-top: 2rem; }
@media (min-width: 768px) { .partners-grid { grid-template-columns: repeat(4, 1fr); } }
.partner {
  display: flex; align-items: center; justify-content: center;
  border-radius: 0.5rem;
  border: 1px solid rgba(111, 140, 255, 0.3);
  background: var(--primary);
  padding: 2.5rem 1.5rem;
  box-shadow: var(--shadow-glow);
}
.partner img { height: 5rem; width: auto; object-fit: contain; }

/* Contact */
.contact-grid { display: grid; gap: 2.5rem; padding: 4rem 0; }
@media (min-width: 1024px) { .contact-grid { grid-template-columns: 1fr 2fr; } }
.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-item {
  display: flex; align-items: flex-start; gap: 1rem;
  border: 1px solid var(--border); background: var(--card);
  border-radius: 0.75rem; padding: 1.25rem;
}
.contact-item .icon-box { width: 2.5rem; height: 2.5rem; }
.contact-item .label { font-size: 0.875rem; font-weight: 500; color: var(--muted-foreground); }
.contact-item .value { font-size: 1rem; font-weight: 600; color: var(--card-foreground); }
.contact-item a.value:hover { color: var(--accent); }

.contact-form {
  border: 1px solid var(--border); background: var(--card);
  border-radius: 1rem; padding: 1.5rem;
}
@media (min-width: 640px) { .contact-form { padding: 2rem; } }
.form-row { display: grid; gap: 1rem; }
@media (min-width: 640px) { .form-row { grid-template-columns: repeat(2, 1fr); } }
.field { display: flex; flex-direction: column; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 0.875rem; font-weight: 500; color: var(--foreground); }
.field input, .field textarea {
  margin-top: 0.5rem;
  width: 100%;
  border-radius: 0.375rem;
  border: 1px solid var(--input);
  background: var(--background);
  color: var(--foreground);
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
}
.field input:focus, .field textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(111, 140, 255, 0.3); }
.field .error { margin-top: 0.25rem; font-size: 0.75rem; color: var(--destructive); }
.field textarea { resize: vertical; min-height: 8rem; }
.form-actions { margin-top: 1.5rem; }
.form-success { margin-top: 1rem; font-size: 0.875rem; color: var(--accent); }