:root {
  color-scheme: dark light;
  --bg: #0a0f1b;
  --bg-contrast: rgba(10, 15, 27, 0.85);
  --text: #e8edf7;
  --muted: #b6c0d4;
  --primary: #4db6ff;
  --primary-hover: #71c8ff;
  --accent: #89f0ff;
  --shadow: rgba(0, 0, 0, 0.3);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background-color: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
}
img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

.site-header {
  position: relative;
  padding: 24px 0;
  backdrop-filter: saturate(120%) blur(6px);
  background: linear-gradient(180deg, rgba(10, 15, 27, .85), rgba(10, 15, 27, .6));
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.brand { margin: 0; font-size: clamp(28px, 5vw, 48px); letter-spacing: .5px; }
.tagline { margin: 6px 0 0; color: var(--muted); font-size: clamp(14px, 2.5vw, 18px); }

.hero {
  position: relative;
  min-height: 68vh;
  display: flex;
  align-items: center;
  /* High-performance, local background: abstract network grid */
  background-color: var(--bg);
  background-image:
    radial-gradient(1000px 600px at 50% 0%, rgba(77, 182, 255, 0.15), rgba(10, 15, 27, 0) 60%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0px, rgba(255, 255, 255, 0.06) 1px, rgba(255, 255, 255, 0.0) 1px, rgba(255, 255, 255, 0.0) 24px),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.025) 0px, rgba(255, 255, 255, 0.025) 1px, rgba(255, 255, 255, 0.0) 1px, rgba(255, 255, 255, 0.0) 18px);
  background-position: center;
  background-size: cover;
}
.hero .overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10, 15, 27, .75), rgba(10, 15, 27, .85)); }
.hero-inner { position: relative; z-index: 1; text-align: center; padding: 60px 0; }
.hero h2 { font-size: clamp(28px, 6vw, 56px); margin: 0 0 12px; }
.hero .description { max-width: 760px; margin: 0 auto 24px; color: var(--muted); font-size: clamp(16px, 2.5vw, 20px); }
.hero .badge {
  display: inline-block;
  margin: 6px;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
  color: var(--text);
  font-size: 14px;
  background: rgba(255, 255, 255, .05);
  backdrop-filter: blur(4px);
}

.cta-button {
  display: inline-block;
  margin-top: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #041019;
  font-weight: 700;
  letter-spacing: .4px;
  box-shadow: 0 10px 24px var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
}
.cta-button:hover { transform: translateY(-2px); box-shadow: 0 14px 30px var(--shadow); filter: brightness(1.05); }
.cta-button:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

.features { padding: 60px 0; background: linear-gradient(180deg, rgba(10, 15, 27, 1), rgba(10, 15, 27, .9)); }
.features h3, .compare h3, .testimonials h3 { font-size: clamp(22px, 3.5vw, 32px); margin: 0 0 20px; text-align: center; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { padding: 22px; background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 16px; backdrop-filter: blur(4px); box-shadow: 0 6px 16px rgba(0,0,0,.2); }
.feature-card h4 { margin: 0 0 8px; font-size: 18px; }

.compare { padding: 40px 0 60px; }
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.comparison { width: 100%; border-collapse: collapse; background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 12px; }
.comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); text-align: left; }
.comparison thead th { background: rgba(255, 255, 255, 0.05); }
.comparison tbody tr:last-child td { border-bottom: none; }

.testimonials { padding: 40px 0 80px; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.testimonial { padding: 18px; background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: 14px; }
.testimonial blockquote { margin: 0 0 10px; color: var(--muted); }

.site-footer { border-top: 1px solid rgba(255, 255, 255, 0.08); background: rgba(10, 15, 27, .95); padding: 20px 0; }
.site-footer .footer-links { display: flex; gap: 14px; flex-wrap: wrap; }
.site-footer a[aria-disabled="true"] { cursor: not-allowed; opacity: .5; }

.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 960px) {
  .feature-grid, .testimonials-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .hero { min-height: 60vh; }
  .feature-grid, .testimonials-grid { grid-template-columns: 1fr; }
  .cta-button { width: 100%; max-width: 320px; }
}

@supports not (backdrop-filter: blur(4px)) {
  .site-header, .feature-card, .hero .badge {
    background: rgba(255, 255, 255, 0.06);
  }
}