* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Lexend", sans-serif;
}
  
body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: #2A7B9B;
    background: radial-gradient(
      circle at var(--x, 50%) var(--y, 50%),
      rgba(237, 221, 83, 0.8) 0%,
      rgba(76, 156, 157, 0.9) 50%,
      rgba(42, 123, 155, 1) 100%
    );
    overflow: hidden;
    transition: background 0.3s ease;
}
  
body:not(:hover) {
    background: linear-gradient(
      208deg,
      rgba(42, 123, 155, 1) 0%,
      rgba(76, 156, 157, 1) 50%,
      rgba(237, 221, 83, 1) 100%
    );
}
  
.container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}
  
.auth-logo {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 30px;
}
  
.auth-logo img {
    width: 150px;
}
  
.card {
    width: 100%;
    max-width: 600px;
    height: 650px;
    position: relative;
    perspective: 1000px;
}
  
.inner-box {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 1s;
    display: flex;
}
  
.card-front,
.card-back {
    position: absolute;
    height: 90%;
    margin-top: 10px;
    background-color: #fff;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-front {
    width: 70%;
    left: 15%; /* Center the card horizontally */
    padding: 40px;
}
  
.card-back {
    width: 100%;
    padding: 30px 50px;
    transform: rotateY(180deg);
}
  
.card h2 {
    font-size: 1.5rem;
    color: #283840;
    margin-bottom: 30px;
    text-align: center;
}
  
.input-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 20px;
    gap: 15px;
}
  
.input-group {
    position: relative;
    flex: 1 1 30%;
    min-width: 200px;
    margin-bottom: 25px;
}

.card-front .input-group {
    width: 100%;
}
  
.input-group input {
    width: 100%;
    padding: 12px 0;
    font-size: 16px;
    color: #283840;
    border: none;
    border-bottom: 2px solid #ddd;
    outline: none;
    background: transparent;
    transition: 0.3s;
}
  
.input-group label {
    position: absolute;
    top: 12px;
    left: 0;
    font-size: 16px;
    color: #999;
    pointer-events: none;
    transition: 0.3s;
}
  
.input-group input:focus ~ label,
.input-group input:valid ~ label {
    top: -20px;
    font-size: 12px;
    color: #4c9c9d;
}

.input-group .register-phone{
    position: absolute;
    top: 12px;
    left: 30px;
    font-size: 16px;
    color: #999;
    pointer-events: none;
    transition: 0.3s;
}
  
.input-group input:focus ~ label .register-phone,
.input-group input:valid ~ label .register-phone {
    top: -20px;
    font-size: 12px;
    color: #4c9c9d;
}
  

.input-group input:focus {
    border-bottom: 2px solid #4c9c9d;
}

.phone-group {
    display: flex;
    align-items: center;
    position: relative;
}

.phone-prefix {
    padding: 10px;
    border-radius: 5px 0 0 5px;
}

.phone-group input[type="tel"] {
    flex: 1;
    padding: 10px;
}

  
.submit-btn {
    width: 100%;
    height: 45px;
    border: none;
    border-radius: 50px;
    background-color: #4c9c9d;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.3s;
    margin-bottom: 20px;
}
  
.submit-btn:hover {
    background-color: #3a8a8b;
}
  
.btn {
    width: 100%;
    height: 45px;
    border: none;
    background-color: transparent;
    color: #4c9c9d;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: 0.3s;
}
  
/* Animation Classes */
.inner-box.rotate {
    transform: rotateY(180deg);
}
  
/* Responsive Design */
@media (max-width: 768px) {
    .card {
        max-width: 500px;
        height: 700px;
    }
  
    .input-group {
        flex: 1 1 100%;
    }
    
    .card-front {
        width: 80%;
        left: 10%;
        padding: 30px;
    }
}
  
@media (max-width: 450px) {
    .card {
        max-width: 400px;
        height: 750px;
    }
  
    .card-front {
        width: 90%;
        left: 5%;
        padding: 20px;
    }
    
    .card-back {
        padding: 30px 20px;
    }
}
  
/* Alert Styles */
.alert {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 5px;
    color: white;
    font-weight: 500;
    z-index: 1000;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}
  
.alert.show {
    transform: translateX(0);
}
  
.alert.error {
    background-color: #ff5252;
}
  
.alert.success {
    background-color: #4caf50;
}