/* Reset & base */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: #333;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

/* Layout */
.container {
  width: 100%;
  max-width: 480px;
}

/* Card */
.card {
  background: #fff;
  border-radius: 16px;
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08), 0 6px 20px rgba(0, 0, 0, 0.04);
}

.card .icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.card h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #1a1a2e;
}

.card p {
  font-size: 1rem;
  line-height: 1.6;
  color: #555;
  margin-bottom: 1.5rem;
}

.card hr {
  border: none;
  border-top: 1px solid #eee;
  margin-bottom: 1.25rem;
}

/* Footer */
.powered-by {
  font-size: 0.85rem;
  color: #888;
}

.powered-by a {
  color: #f38020;
  text-decoration: none;
  font-weight: 500;
}

.powered-by a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 480px) {
  .card {
    padding: 2rem 1.25rem;
  }

  .card h1 {
    font-size: 1.5rem;
  }
}