:root {
  --bg: #0D1117;
  --surface: #1A1F2B;
  --border: #2B3445;
  --text: #FFFFFF;
  --muted: #E6E8EC;
  --accent: #FFD54F;
  --accent-deep: #FF8F00;
  --pink: #FF4DB2;
  --purple: #7C4DFF;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  background:
    radial-gradient(900px 420px at -10% -20%, rgba(255, 143, 0, 0.25), transparent 55%),
    radial-gradient(800px 380px at 120% -10%, rgba(124, 77, 255, 0.2), transparent 52%),
    var(--bg);
  color: var(--text);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(520px, 100%);
  background: rgba(26, 31, 43, 0.88);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 34px 28px;
  text-align: center;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.45);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 6vw, 42px);
  line-height: 1.05;
  color: var(--text);
  text-shadow: 0 0 14px rgba(255, 213, 79, 0.18);
}

.subtitle {
  margin: 14px auto 0;
  max-width: 44ch;
  color: var(--muted);
  line-height: 1.5;
  font-size: 16px;
}

.demo-btn {
  display: inline-block;
  margin-top: 24px;
  text-decoration: none;
  color: #0D1117;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-radius: 12px;
  padding: 12px 24px;
  font-weight: 800;
  text-transform: lowercase;
  letter-spacing: 0.06em;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 8px 24px rgba(255, 143, 0, 0.32);
}

.demo-btn:hover {
  transform: translateY(-1px) scale(1.01);
}