/* Connectivity — csusa.com | modern light theme */
:root {
  --blue: #1a6ee0;
  --blue-dark: #0f4faf;
  --blue-light: #e8f1fd;
  --ink: #1c2733;
  --ink-soft: #4a5a6a;
  --line: #e3e9f0;
  --bg: #ffffff;
  --bg-alt: #f6f9fc;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(16, 42, 78, 0.08);
  --maxw: 1120px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25rem; color: var(--ink); letter-spacing: -0.02em; }
.logo:hover { text-decoration: none; }
.logo .mark { width: 34px; height: 34px; flex: none; }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { color: var(--ink-soft); font-weight: 500; font-size: 0.95rem; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--blue); text-decoration: none; }
.btn {
  display: inline-block; background: var(--blue); color: #fff !important;
  padding: 10px 22px; border-radius: 8px; font-weight: 600; font-size: 0.95rem;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--blue-dark); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--blue) !important; border: 1.5px solid var(--blue); }
.btn.ghost:hover { background: var(--blue-light); }
.btn.big { padding: 14px 30px; font-size: 1.05rem; border-radius: 10px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2.5px; background: var(--ink); margin: 5px 0; border-radius: 2px; }

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--blue-light) 0%, #ffffff 100%);
  padding: 88px 0 72px;
  text-align: center;
}
.hero h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); line-height: 1.15; letter-spacing: -0.03em; max-width: 850px; margin: 0 auto 20px; }
.hero h1 em { font-style: normal; color: var(--blue); }
.hero p.lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 720px; margin: 0 auto 34px; }
.hero .actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.page-hero { background: linear-gradient(180deg, var(--blue-light) 0%, #ffffff 100%); padding: 64px 0 48px; }
.page-hero .kicker { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.8rem; font-weight: 700; color: var(--blue); margin-bottom: 10px; }
.page-hero h1 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); letter-spacing: -0.02em; }
.page-hero p { color: var(--ink-soft); max-width: 760px; margin-top: 12px; font-size: 1.1rem; }

/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -0.02em; margin-bottom: 12px; }
.section-head p { color: var(--ink-soft); font-size: 1.05rem; }

/* Cards */
.grid { display: grid; gap: 24px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
.card h3 { font-size: 1.15rem; margin-bottom: 10px; letter-spacing: -0.01em; }
.card p { color: var(--ink-soft); font-size: 0.95rem; }
.card .icon {
  width: 46px; height: 46px; border-radius: 10px; background: var(--blue-light);
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
  color: var(--blue); font-size: 1.3rem;
}
.card a.more { display: inline-block; margin-top: 14px; font-weight: 600; font-size: 0.92rem; }

/* Feature lists */
.feature-list { list-style: none; display: grid; gap: 14px; }
.feature-list li { padding-left: 30px; position: relative; color: var(--ink-soft); }
.feature-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--blue); font-weight: 700;
}
.feature-list li strong { color: var(--ink); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stats .num { font-size: 2.6rem; font-weight: 800; color: var(--blue); letter-spacing: -0.03em; }
.stats .label { color: var(--ink-soft); font-weight: 500; }

/* Testimonials */
.quote {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px; box-shadow: var(--shadow);
}
.quote p { color: var(--ink-soft); font-style: italic; margin-bottom: 18px; }
.quote .who { font-weight: 700; color: var(--ink); font-style: normal; }
.quote .role { color: var(--ink-soft); font-size: 0.9rem; }

/* Service detail sections */
.svc { border-top: 1px solid var(--line); }
.svc:first-of-type { border-top: 0; }
.svc .kicker { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.78rem; font-weight: 700; color: var(--blue); margin-bottom: 8px; }
.svc h2 { font-size: clamp(1.5rem, 2.8vw, 2rem); letter-spacing: -0.02em; margin-bottom: 16px; }
.svc .intro { color: var(--ink-soft); font-size: 1.05rem; max-width: 820px; margin-bottom: 32px; }
.svc h3 { font-size: 1.1rem; margin: 28px 0 14px; }
.pill-quote {
  border-left: 4px solid var(--blue); background: var(--blue-light);
  padding: 16px 22px; border-radius: 0 10px 10px 0; margin-bottom: 28px;
  color: var(--ink-soft); font-style: italic; max-width: 820px;
}

/* Contact */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.contact-card h3 { margin-bottom: 14px; font-size: 1.05rem; }
.contact-card ul { list-style: none; }
.contact-card li { margin-bottom: 10px; color: var(--ink-soft); font-size: 0.95rem; }
.contact-card li strong { color: var(--ink); display: block; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; }

/* CTA band */
.cta-band { background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%); color: #fff; text-align: center; border-radius: var(--radius); padding: 56px 32px; }
.cta-band h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-bottom: 12px; letter-spacing: -0.02em; }
.cta-band p { opacity: 0.9; max-width: 640px; margin: 0 auto 28px; }
.cta-band .btn { background: #fff; color: var(--blue) !important; }
.cta-band .btn:hover { background: var(--blue-light); }

/* Support tiles */
.support-tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.support-tiles a.tile {
  display: block; text-align: center; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 44px 28px; box-shadow: var(--shadow);
  color: var(--ink); font-weight: 700; font-size: 1.1rem;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.support-tiles a.tile:hover { transform: translateY(-4px); border-color: var(--blue); text-decoration: none; }
.support-tiles .tile .icon { font-size: 2.2rem; margin-bottom: 14px; }
.support-tiles .tile small { display: block; color: var(--ink-soft); font-weight: 400; margin-top: 8px; font-size: 0.9rem; }

/* Footer */
.site-footer { background: #10202f; color: #b8c6d4; padding: 56px 0 32px; margin-top: 64px; }
.site-footer h4 { color: #fff; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 16px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.site-footer a { color: #b8c6d4; }
.site-footer a:hover { color: #fff; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 10px; font-size: 0.93rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 0.88rem; }
.socials { display: flex; gap: 16px; }
.socials a { font-size: 0.9rem; }

/* Responsive */
@media (max-width: 900px) {
  .grid.cols-4, .grid.cols-3, .contact-grid, .support-tiles { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .grid.cols-4, .grid.cols-3, .grid.cols-2, .contact-grid, .support-tiles { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 20px 24px; gap: 18px; align-items: flex-start;
  }
  .main-nav.open { display: flex; }
  .footer-grid { grid-template-columns: 1fr; }
}