:root {
  --bg-start: #0ea5e9;
  --bg-end: #0b1220;
  --card-bg: rgba(17, 24, 39, 0.7);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22c55e;
  --focus: rgba(14, 165, 233, 0.45);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 10% 10%, var(--bg-start), transparent),
              radial-gradient(1000px 700px at 90% 20%, #22c55e26, transparent),
              linear-gradient(180deg, var(--bg-end) 0%, #00040d 100%);
}

.page {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 24px;
}

.card {
  width: 100%;
  max-width: 720px;
  padding: 32px 28px;
  border-radius: 16px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.45);
}

.logo {
  display: block;
  margin: 0 auto 12px;
  width: 140px;
  height: auto;
  filter: drop-shadow(0 6px 16px rgba(0,0,0,0.55));
}

h1 {
  margin: 8px 0 12px;
  font-size: 28px;
  line-height: 1.2;
}

.lead {
  margin: 0 auto 20px;
  max-width: 56ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.6;
}

.cta {
  display: inline-block;
  padding: 14px 20px;
  border-radius: 12px;
  color: #071018;
  background: linear-gradient(135deg, #34d399 0%, #22c55e 50%, #10b981 100%);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.2px;
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.35);
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(16, 185, 129, 0.45);
  filter: brightness(1.05);
}

.cta:active {
  transform: translateY(0);
}

.cta:focus-visible {
  outline: none;
  box-shadow: 0 0 0 6px var(--focus), 0 6px 18px rgba(16, 185, 129, 0.35);
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

@media (min-width: 640px) {
  h1 {
    font-size: 32px;
  }
  .lead {
    font-size: 17px;
  }
  .logo {
    width: 160px;
  }
}