.strength-container {
    height: 6px;
    margin-top: 8px;
    background: transparent;
    border-radius: 3px;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    width: 0;
    transition: all 0.3s ease;
}

.weak {
    background: #ff4d4d;
    width: 10%;
}

.medium {
    background: #ffa500;
    width: 35%;
}

.strong {
    background: #0071e3;
    width: 70%;
}

.extra-strong {
    background: #28a745;
    width: 100%;
}

.form-control:focus {
    background-color: #fff;
    color: #000;
    box-shadow: 0 0 0 0.25rem rgba(255, 193, 7, 0.25);
}