body {
    background-color: #1a1a1a;
    color: #ffffff;
    font-family: 'Arial', sans-serif;
}

.form-container {
    max-width: 500px;
    margin: 50px auto;
    padding: 40px;
    background-color: #2c2c2c;
    border-radius: 8px;
}

h2 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 30px;
}

.form-group label {
    display: block;
    margin-bottom: 15px;
    font-weight: bold;
}

.btn-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.btn-group .btn {
    flex: 1;
    background-color: #3d3d3d;
    color: #ffffff;
    border: 1px solid #555555;
    border-radius: 8px;
    padding: 15px;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-group .btn.active {
    background-color: #3d3d3d;
    border-color: #a8ff47;
    box-shadow: 0 0 10px rgba(168, 255, 71, 0.5);
}

.btn-group .btn strong {
    display: block;
    font-size: 16px;
}

.btn-group .btn span {
    font-size: 14px;
    color: #bbbbbb;
}

.form-control {
    background-color: #3d3d3d;
    border: 1px solid #555555;
    color: #ffffff;
    border-radius: 8px;
    padding: 15px;
    width: 100%;
    margin-bottom: 20px;
}

.form-control::placeholder {
    color: #bbbbbb;
}

.form-control:focus {
    background-color: #3d3d3d;
    color: #ffffff;
    border-color: #a8ff47;
    box-shadow: none;
}

.input-group {
    position: relative;
}

.input-group .icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #bbbbbb;
}

.input-group .form-control {
    padding-left: 40px;
}

.btn-submit {
    background-color: #a8ff47;
    color: #1a1a1a;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    padding: 15px;
    width: 100%;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-submit:hover {
    background-color: #88cc3a;
}