.calculator-wrapper {
    max-width: 600px !important;
    margin: 40px auto;
}

.password-box {
    position: relative;
    display: flex;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    margin-bottom: 30px;
    box-shadow: 0 0 15px rgba(102, 252, 241, 0.1);
    overflow: hidden;
}

.password-box input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--accent-color);
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 1.4rem;
    padding: 20px;
    text-align: center;
    letter-spacing: 1px;
    outline: none;
}

.password-box button {
    width: 60px;
    background: rgba(102, 252, 241, 0.1);
    border: none;
    border-left: 1px solid var(--accent-color);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: 0.2s ease;
    border-radius: 0;
    box-shadow: none;
}

.password-box button:hover {
    background: var(--accent-color);
    color: #000;
}

.length-control {
    margin-bottom: 25px;
}

.length-label {
    display: flex;
    justify-content: space-between;
    color: #ccc;
    font-size: 0.9rem;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

input[type=range] {
    width: 100%;
    height: 6px;
    background: #333;
    border-radius: 3px;
    outline: none;
    padding: 0;
    border: none;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    box-shadow: 0 0 10px var(--accent-color);
    transition: 0.2s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 30px;
}

.check-box {
    display: flex;
    align-items: center;
    color: #ccc;
    font-size: 0.9rem;
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-left: 35px;
}

.check-box input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 22px;
    width: 22px;
    background-color: #222;
    border: 1px solid #555;
    border-radius: 4px;
    transition: 0.2s;
}

.check-box:hover input ~ .checkmark {
    border-color: var(--accent-color);
}

.check-box input:checked ~ .checkmark {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(102, 252, 241, 0.4);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 7px;
    top: 3px;
    width: 5px;
    height: 10px;
    border: solid black;
    border-width: 0 3px 3px 0;
    transform: rotate(45deg);
}

.check-box input:checked ~ .checkmark:after {
    display: block;
}

@media (max-width: 500px) {
    .settings-grid {
        grid-template-columns: 1fr;
    }
}