* {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}

body {
    background: #002239;
    color: white;
}

.container {
    margin: 5% auto;
    width: 90%;
    max-width: 700px;
}

.container h1 {
    font-weight: 500;
    font-size: 45px;
}

.container h1 span {
    color: #019f55;
    border-bottom: 4px solid #019f55;
    padding-bottom: 7px;
}

.options {
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.options label {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.options input[type="number"] {
    width: 70px;
    padding: 5px;
    font-size: 16px;
}

.display {
    width: 100%;
    margin-top: 30px;
    background: #fff;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-radius: 5px;
}

.display input {
    border: 0;
    outline: 0;
    font-size: 24px;
    width: 100%;
}

.copy-btn {
    background: none;
    border: none;
    color: #019f55;
    font-size: 16px;
    cursor: pointer;
    margin-left: 10px;
}

.copy-btn img {
    width: 40%;
}

.button-group {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.generate-btn,
.show-strength {
    border: 0;
    outline: 0;
    background: #019f55;
    color: #fff;
    font-size: 22px;
    font-weight: 300;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px 26px;
    border-radius: 5px;
    cursor: pointer;
}

.generate-btn img {
    width: 28px;
    margin-right: 10px;
}

.message {
    margin-top: 10px;
    font-size: 16px;
    color: #00ff9d;
}

.strength-meter {
    width: 100%;
    height: 10px;
    background: #ccc;
    border-radius: 5px;
    margin-top: 10px;
}

.strength-meter-fill {
    height: 100%;
    width: 0%;
    background-color: red;
    border-radius: 5px;
    transition: width 0.5s, background-color 0.5s;
}