:root{
  --bg: #000;
  --fg: #fff;
  --muted: #d9d9d9;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial;
  -webkit-font-smoothing: antialiased;
}

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start; /* push content higher */
  text-align: center;
  padding: 12vh 16px 28px; /* top padding pushes content into upper/middle */
  gap: 10px;
}

.logo {
  width: clamp(320px, 60vw, 620px);
  height: auto;
  margin-bottom: 6px;
}

.tagline {
  margin: 0;
  font-size: clamp(20px, 3vw, 28px);
  color: var(--muted);
}

.btn {
  margin-top: 10px;
  display: inline-block;
  padding: 14px 26px;
  border-radius: 999px;
  background: var(--fg);
  color: #111;
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 6px 18px rgba(255,255,255,0.12);
  transition: transform .1s ease, box-shadow .15s ease;
}
.btn:active { transform: translateY(1px); }

.sr-only {
  position:absolute !important;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}