@import url(https://fonts.googleapis.com/css?family=Poppins:100,100italic,200,200italic,300,300italic,regular,italic,500,500italic,600,600italic,700,700italic,800,800italic,900,900italic);

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f2f2f2, #b0c4de);
}

.container {
  position: relative;
  width: 100%;
  max-width: 420px;
  background: #2d3748;
  padding: 40px;
  overflow: hidden;
  border-radius: 15px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  text-align: center;
}

.heading {
  font-size: 32px;
  color: #ffffff;
  margin-bottom: 20px;
}

.btn {
  margin-top: 15px;
  width: 100%;
  height: 55px;
  background: linear-gradient(135deg, #00aaff, #0066cc);
  border: none;
  border-radius: 8px;
  color: #ffffff;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.4s ease, transform 0.2s ease;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn:hover {
  background: linear-gradient(135deg, #0066cc, #004488);
  transform: scale(1.05);
}

.exit-button {
  position: fixed;
  top: 10px;
  right: 10px;
  background: none;
  border: none;
  color: #ff4d4d;
  font-size: 30px;
  cursor: pointer;
  transition: color 0.3s ease;
}

.exit-button:hover {
  color: #cc0000;
}

@media (max-width: 468px) {
  .container {
    min-height: 100vh;
    max-width: 100%;
    border-radius: 0;
    padding: 40px 20px;
  }
}