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

body {
  min-height: 100vh;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-404 {
  width: 100%;
  display: flex;
  justify-content: center;
}

.card {
  text-align: center;
  padding: 40px 20px;
  max-width: 500px;
}

h1 {
  font-size: 72px;
  color: #333;
  margin-bottom: 10px;
}

.image-box {
  margin: 20px 0;
  animation: float 3s ease-in-out infinite;
}

.image-box img {
  max-width: 100%;
  height: auto;
}

h3 {
  font-size: 22px;
  margin-top: 15px;
}

p {
  color: #777;
  margin-top: 10px;
}

.help-line {
  margin-top: 15px;
  color: #2c7be5;
  font-weight: 600;
}

.btn {
  display: inline-block;
  margin-top: 25px;
  padding: 12px 30px;
  background: #6ab04c;
  color: #fff;
  text-decoration: none;
  border-radius: 25px;
  transition: background 0.3s ease;
}

.btn:hover {
  background: #4f8f35;
}

/* Animation */
@keyframes float {
  0% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
  100% { transform: translateY(0); }
}