/* CSS: Cyberpunk Lime Checkerboard + Frosted Glass Landing (mobile-first) */

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

html, body {
  height: 100%;
}

:root {
  --lime-1: #b8ff3b;
  --lime-2: #98e600;
  --yellow: #ffd84d;
  --yellow-dark: #e8b600;
  --glass: rgba(255, 255, 255, 0.20);
  --border: rgba(255, 255, 255, 0.40);
  --text: #0a0a0a;
  --shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;

  /* Lime checkerboard background */
  background-color: var(--lime-1);
  background-image:
    linear-gradient(45deg, rgba(0, 0, 0, 0.15) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0, 0, 0, 0.15) 25%, transparent 25%),
    linear-gradient(0deg, var(--lime-1) 0%, var(--lime-1) 100%);
  background-size: 40px 40px;
  background-position: 0 0, 20px 20px, 0 0;
}

/* Header/Main structure */
.site-header {
  min-height: 4rem;
  display: block;
  /* placeholder for potential branding; kept empty per requirements */
}

main {
  display: block;
}

.hero {
  width: min(100%, 1100px);
  margin: 2rem auto;
  padding: 1.75rem 1.5rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px) saturate(120%);
  -webkit-backdrop-filter: blur(8px) saturate(120%);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: 1fr;
  grid-auto-rows: auto;
  gap: 1.25rem;
  text-align: center;
}

.hero h1 {
  font-size: 1.75rem;
  margin: 0;
  letter-spacing: .2px;
}

.subhead {
  font-size: 1rem;
  color: #111;
  opacity: 0.95;
  margin: 0;
}

.hero-media {
  width: 100%;
}

.hero-media img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.25);
}

.cta {
  display: inline-block;
  padding: 1.1rem 1.6rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: #0a0a0a;
  text-decoration: none;
  border-radius: 999px;
  background: linear-gradient(135deg, #fff59d 0%, #ffd84d 60%, #ffcc00 100%);
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}
.cta:hover { transform: translateY(-2px); box-shadow: 0 12px 22px rgba(0, 0, 0, 0.22); }
.cta:focus-visible { outline: 3px solid #fff; outline-offset: 2px; }

/* Footer with small advertisement */
.site-footer {
  padding: 1.25rem;
  text-align: center;
  font-size: 0.9rem;
  color: #0b0b0b;
}
.site-footer .ad a {
  color: #0b0b0b;
  text-decoration: underline;
}
.site-footer .gratitude {
  margin-top: 0.5rem;
  color: #0b0b0b;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .cta, .hero { transition: none; }
  .hero-media img { transition: none; }
}

/* Desktop enhancements */
@media (min-width: 768px) {
  .hero {
    padding: 2.5rem;
    gap: 1.75rem;
  }
  .hero h1 { font-size: 2.25rem; }
  .subhead { font-size: 1.05rem; }
  .cta { font-size: 1.3rem; padding: 1.25rem 2rem; }
}