:root {
  --metal-blue-700: #142d6b;
  --metal-blue-600: #1a3c8f;
  --metal-blue-500: #1b4fb0;
  --metal-blue-400: #3498db;
  --gray-100: #f7f8fa;
  --gray-200: #eef0f4;
  --gray-300: #dde1e8;
  --gray-500: #6b7685;
  --gray-600: #4f5966;
  --ink-900: #0f172a;
  --ink-700: #1f2937;
  --ink-600: #334155;
  --white: #ffffff;
  --bg: #ffffff;
  --heading: var(--ink-900);
  --body-text: var(--ink-600);
}

* { box-sizing: border-box; }
html { overflow-x: hidden; }
html, body { margin: 0; padding: 0; height: 100%; }
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--body-text);
  background: var(--bg);
  line-height: 1.6;
}

.container { width: min(1100px, 92vw); margin: 0 auto; }

.site-header {
  background: var(--white);
  position: sticky; top: 0; z-index: 20;
  border-bottom: 1px solid var(--gray-300);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--metal-blue-700); font-weight: 700; letter-spacing: 0.3px; }
.brand img { height: 120px; width: auto; }
.nav { display: flex; gap: 18px; align-items: center; }
.nav a { color: var(--ink-600); text-decoration: none; padding: 8px 10px; border-radius: 6px; transition: color 0.2s, background 0.2s; }
.nav a:hover { color: var(--white); background: var(--metal-blue-500); }

.btn { display: inline-block; padding: 10px 16px; border-radius: 10px; text-decoration: none; font-weight: 600; }
.btn-primary { background: var(--metal-blue-500); color: var(--white); box-shadow: 0 4px 14px rgba(27,79,176,0.25); }
.btn-primary:hover { filter: brightness(1.07); }
.btn-secondary { background: var(--gray-100); color: var(--ink-700); border: 1px solid var(--gray-300); }
.btn-secondary:hover { background: var(--gray-200); }
.nav a.btn-chrome { background: var(--metal-blue-500); color: var(--white); }
.nav a.btn-chrome:hover { background: var(--metal-blue-600); color: var(--white); }

.gradient-metal { background: linear-gradient(180deg, rgba(27,79,176,0.06), rgba(27,79,176,0) 70%); }
.gradient-chrome { background: var(--gray-100); border-top: 1px solid var(--gray-200); border-bottom: 1px solid var(--gray-200); }

.hero { padding: 48px 0; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; align-items: center; }
.hero h1 { color: var(--heading); font-size: clamp(28px, 3.2vw, 44px); line-height: 1.15; margin: 0 0 8px; }
.hero p { color: var(--body-text); margin: 0 0 18px; font-size: 18px; }
.hero .actions { display: flex; gap: 12px; }
.hero-art img { max-width: 50%; height: auto; display: block; margin: 0 auto; filter: drop-shadow(0 8px 24px rgba(0,0,0,0.1)); }

.section { padding: 42px 0; }
.section-title { color: var(--heading); font-size: 24px; margin: 0 0 8px; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { border: 1px solid var(--gray-300); padding: 16px; border-radius: 14px; text-decoration: none; color: var(--body-text); background: var(--white); }
.card:hover { border-color: var(--metal-blue-400); background: rgba(27,79,176,0.03); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.card img { width: 72px; height: 72px; }
.card h3 { color: var(--heading); margin: 10px 0 6px; }
.card p { margin: 0; font-size: 14px; }

.content { display: grid; grid-template-columns: 1fr; gap: 4px; }
.content h2 { margin: 16px 0 4px; }
.content p, .content ul { margin: 0 0 4px; }
.content img { max-width: 100%; border-radius: 12px; border: 1px solid var(--gray-300); background: var(--gray-100); }

.site-footer { margin-top: 40px; padding: 20px 0; border-top: 1px solid var(--gray-300); background: var(--gray-100); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-nav { display: flex; gap: 12px; }
.footer-nav a { color: var(--ink-600); text-decoration: none; }
.footer-nav a:hover { color: var(--metal-blue-600); }
.muted { color: var(--gray-500); font-size: 14px; }

/* Testimonials */
.testimonial blockquote { margin: 0; font-style: italic; color: var(--ink-600); line-height: 1.7; }
.testimonial blockquote p { margin: 0; }
.testimonial-author { margin: 12px 0 0; color: var(--metal-blue-600); font-size: 15px; }

/* Videos */
.video-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-top: 12px; }
.video-card { background: var(--white); border: 1px solid var(--gray-300); border-radius: 14px; overflow: hidden; text-decoration: none; color: var(--body-text); transition: border-color 0.2s, box-shadow 0.2s; }
.video-card:hover { border-color: var(--metal-blue-400); box-shadow: 0 4px 12px rgba(0,0,0,0.06); }
.video-card h3 { color: var(--heading); margin: 0; padding: 10px 16px 12px; font-size: 16px; }
.video-thumb { position: relative; }
.video-thumb img { display: block; width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.play-btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 56px; height: 56px; background: rgba(0,0,0,0.65); border-radius: 50%; }
.play-btn::after { content: ""; position: absolute; top: 50%; left: 54%; transform: translate(-50%, -50%); border-style: solid; border-width: 10px 0 10px 18px; border-color: transparent transparent transparent #fff; }
.video-card:hover .play-btn { background: rgba(27,79,176,0.85); }

/* CTA */
.cta { padding: 48px 0; text-align: center; background: var(--gray-100); }
.cta h2 { color: var(--heading); font-size: 28px; margin: 0 0 8px; }
.cta p { color: var(--body-text); margin: 0 0 18px; font-size: 18px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 4px; color: var(--ink-700); }
.form-input {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--gray-300);
  background: var(--white);
  color: var(--ink-900);
  font-family: inherit;
  font-size: inherit;
}
.form-input:focus {
  outline: none;
  border-color: var(--metal-blue-400);
  box-shadow: 0 0 0 2px rgba(52,152,219,0.2);
}

/* Mobile nav */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink-600); margin: 5px 0; border-radius: 2px; transition: 0.3s; }

@media (max-width: 860px) {
  .brand img { height: 60px; }
  .hero-inner, .grid-2 { grid-template-columns: 1fr; }
  .hero .actions { flex-wrap: wrap; }
  .nav-toggle { display: block; }
  .nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background: var(--white);
    padding: 0 20px;
    border-bottom: 1px solid var(--gray-300);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
  }
  .nav.open { max-height: 400px; padding: 12px 20px; }
  .nav a { padding: 12px 0; font-size: 16px; min-height: 44px; display: flex; align-items: center; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-nav { justify-content: center; }
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--metal-blue-400);
  outline-offset: 2px;
  border-radius: 4px;
}
.btn:focus-visible { outline-offset: 3px; }
.card:focus-visible { outline-offset: -2px; border-radius: 14px; }
.form-input:focus-visible { outline: none; border-color: var(--metal-blue-400); box-shadow: 0 0 0 2px rgba(52,152,219,0.2); }

/* Active nav indicator */
.nav a[aria-current="page"] { color: var(--white); background: var(--metal-blue-600); }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--metal-blue-500);
  color: var(--white);
  border-radius: 0 0 8px 8px;
  text-decoration: none;
  font-weight: 600;
}
.skip-link:focus { top: 0; }

/* Utility */
.lead { font-size: 18px; color: var(--ink-700); }
.grid-2 { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 24px; }
.list { padding-left: 18px; }
.list li { margin: 6px 0; }