body {
    margin: 0;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #9ac4ff, #1f62e6);
    position: relative;
}

.back-button-container {
    position: absolute;
    top: 20px;
    left: 20px;
}

.back-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: #E6EEF9;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    transition: transform 0.2s ease;
}

.back-button:hover {
    transform: scale(1.05);
}

.back-button .material-icons {
    font-size: 36px;
    color: #0000FF;
}

.container {
    background-color: #FFFFFF;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 350px;
}

.container h2 {
    color: #0000FF;
    font-size: 2.5rem;
    margin-bottom: 30px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group input {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    background-color: #F0F0F0;
    font-size: 1rem;
    box-sizing: border-box;
}

.btn {
    width: 100%;
    padding: 15px;
    font-size: 1.1rem;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    background-color: #0000FF;
    color: #FFFFFF;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #0000CC;
}

.message-success {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 30px;
    color: #4CAF50;
}

.message-success .material-icons {
    font-size: 28px;
    margin-right: 10px;
}

.message-success.hidden {
    display: none;
}

@media (max-width: 480px) {
    .container {
        width: 90%;
        padding: 20px;
    }
}

a {
    color: #84a1f9;
}

a:hover {
    color: #779bfe;
}