body {
  font-family: Arial;
  background: #0d1117;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: 
    linear-gradient(rgba(0,0,0,0.35), rgba(0,0,0,0.15)),
    url('GIT.jpg');

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  color: white;
}

.container {
  text-align: center;
}

input {
  padding: 12px;
  width: 260px;
  margin: 10px;
  border-radius: 50px; 
  border: none;
  outline: none;
  background: white;
  color: black;
   transition: 0.2s;
}
input:focus {
  border: 2px solid #58a6ff;
}
.card {
  background: #161b22;
  padding: 20px;
  border-radius: 15px;
  margin-top: 20px;
  animation: fadeIn 0.5s ease-in;
}

img {
  width: 100px;
  border-radius: 50%;
}

.hidden {
  display: none;
}

.error {
  color: red;
  margin-top: 10px;
}
/*  Spinner */
.spinner {
  width: 50px;
  height: 50px;
  border: 5px solid #ccc;
  border-top: 5px solid #58a6ff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 20px auto;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
  from { 
    opacity: 0; 
    transform: translateY(10px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}
/* Mobile View */
@media (max-width: 600px) {

  body {
    padding: 20px;
    height: auto;
  }

  .container {
    width: 100%;
  }

  input {
    width: 100%;
    max-width: 320px;
    font-size: 16px;
    padding: 14px;
  }

  .card {
    width: 100%;
    max-width: 320px;
    margin: 20px auto;
    padding: 18px;
  }

  img {
    width: 80px;
  }

  h1 {
    font-size: 20px;
  }

  h2 {
    font-size: 18px;
  }

  p {
    font-size: 14px;
  }
}