:root {
  --bg: #0b0f14;
  --surface: #0f1720;
  --text: #e6edf3;
  --muted: #9fb0c3;
  --accent: #2f81f7;
  --accent-2: #22c55e;
  --border: #1f2a37;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 600px at 80% -10%, #13315855, transparent 60%),
              radial-gradient(1000px 600px at -10% 0%, #1a603a33, transparent 60%),
              var(--bg);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Top-centered greeting */
.top-bar {
  position: sticky;
  top: 0;
  width: 100%;
  background: linear-gradient(to bottom, rgba(15, 23, 32, 0.9), rgba(15, 23, 32, 0.7));
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}
.top-bar .container {
  display: flex;
  align-items: center;
  justify-content: center; /* centers the greeting horizontally */
  height: 72px;
}
.greeting {
  margin: 0;
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 700;
  letter-spacing: 0.3px;
}

/* Hero section */
.hero {
  display: grid;
  place-items: center;
  text-align: center;
  min-height: calc(100vh - 72px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  color: var(--text);
}
.brand .icon {
  width: 28px;
  height: 28px;
  color: var(--accent-2);
}
.brand-name {
  font-size: clamp(18px, 1.8vw, 22px);
  opacity: 0.95;
}
.tagline {
  margin: 14px auto 28px;
  max-width: 60ch;
  color: var(--muted);
  font-size: clamp(14px, 1.2vw, 16px);
}

.cta {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #7aa8f9);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid #2a61b8;
  box-shadow: 0 8px 24px rgba(47, 129, 247, 0.25);
}
.cta:hover { filter: brightness(1.05); }
.cta:active { transform: translateY(1px); }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 640px) {
  .top-bar .container { height: 64px; }
  .hero { min-height: calc(100vh - 64px); }
}