/* Reset and base */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }

/* Theme: neon hacker night palette */
:root {
  --bg: #000;
  --surface: rgba(255,255,255,.08);
  --surface-2: rgba(255,255,255,.14);
  --text: #eaffff;
  --muted: #b9f0ff;
  --radius: 14px;
  --shadow: 0 8px 28px rgba(0,0,0,.6);
  --glow: 0 0 8px rgba(0,255,255,.9), 0 0 20px rgba(0,255,255,.6);
  --cyan: #00f5ff;
}

/* Typography */
html { font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
a { color: #eaffff; text-decoration: none; }

/* Page background with glow overlay */
body {
  background: #000;
  color: var(--text);
  min-height: 100%;
  line-height: 1.6;
  background-image: radial-gradient(circle at 20% 0, rgba(0,255,255,.12), transparent 40%),
                    radial-gradient(circle at 80% 0, rgba(255,0,255,.08), transparent 30%);
  background-color: #000;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 15% 0, rgba(0,255,255,.12), transparent 40%),
              radial-gradient(circle at 85% 10%, rgba(255,0,255,.08), transparent 30%);
  z-index: -1;
  pointer-events: none;
  mix-blend-mode: screen;
}

/* Header */
header {
  padding: .75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(0,0,0,.75);
  border-bottom: 1px solid rgba(255,255,255,.15);
}
.brand {
  font-weight: 900;
  color: #fff;
  text-shadow: 0 0 8px rgba(0,255,255,.9);
  letter-spacing: .4px;
  display: inline-block;
}

/* Layout */
main { padding: 1rem; }

/* Section styling (frosted glass) */
section {
  border-radius: var(--radius);
  padding: 1rem;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.14);
  margin: 1rem auto;
  max-width: 1100px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.grid { display: grid; gap: 1.6rem; }

/* Hero section (mobile-first) */
.hero { align-items: center; grid-template-columns: 1fr; padding: 2rem 1rem; }
.hero-copy { padding: 1.25rem; background: rgba(0,0,0,.28); border-radius: 12px; 
  border: 1px solid rgba(255,255,255,.18); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.hero-copy h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.04;
  margin-bottom: .5rem;
  color: #fff;
  text-shadow: 0 0 8px rgba(0,255,255,.9);
}
.subhead { color: var(--muted); font-size: clamp(1rem, 3vw, 1.25rem); margin-bottom: .9rem; }

/* CTA button with neon glow */
.cta {
  display: inline-block;
  padding: .9rem 1.25rem;
  border-radius: 999px;
  border: 1px solid rgba(0,255,255,.8);
  color: #eaffff;
  background: linear-gradient(135deg, rgba(0,255,255,.25), rgba(0,0,0,.4));
  text-shadow: 0 0 6px rgba(0,255,255,.9);
  font-weight: 700;
  box-shadow: 0 0 14px rgba(0,255,255,.65);
  transition: transform .2s ease, box-shadow .2s ease;
}
.cta:hover { transform: translateY(-1px); box-shadow: 0 0 22px rgba(0,255,255,.9); }
.cta:focus-visible { outline: 2px solid #0ff; outline-offset: 2px; }

/* Hero image */
.hero-media img { width: 100%; height: auto; border-radius: 12px; border: 1px solid rgba(255,255,255,.15); display:block; box-shadow: 0 12px 28px rgba(0,0,0,.6); }

/* Features */
.features { padding: 1rem; }
.features h2 { font-size: 1.5rem; margin-bottom: .75rem; color: #fff; }
.features-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.feature { padding: 1rem; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.15); border-radius: 12px; }

/* Testimonials */
.testimonials { padding: 1rem; }
.testimonials h2 { font-size: 1.5rem; margin-bottom: .75rem; }
.testimonials-list { list-style: none; display: grid; grid-template-columns: 1fr; gap: 1rem; }
blockquote { margin: .25rem 0; font-style: normal; color: #eaffff; }
.testimonials-list footer { font-size: .95rem; color: #bdf2ff; }

/* Footer / ad area */
.site-footer { padding: 1rem; text-align: center; }
.ad { display: grid; gap: .5rem; justify-items: center; align-items: center; padding: .75rem; border-radius: 12px; background: rgba(0,0,0,.25); border: 1px solid rgba(255,255,255,.15); margin: .75rem auto; }
.ad a { color: #eaffff; font-weight: 700; }

/* Focus outline for accessibility */
:focus-visible { outline: 2px solid #0ff; outline-offset: 2px; }

/* Desktop two-column hero and grid shifts */
@media (min-width: 700px) {
  .hero { grid-template-columns: 1.05fr 0.95fr; padding: 2.5rem 2rem; }
  .features-grid { grid-template-columns: repeat(3, 1fr); }
  .testimonials-list { grid-template-columns: repeat(3, 1fr); }
  .ad { justify-items: center; grid-template-columns: auto 1fr; justify-content: center; }
}
@media (max-width: 699px) {
  .features-grid { grid-template-columns: 1fr; }
  .testimonials-list { grid-template-columns: 1fr; }
}