body {

    margin: 0;

    background: #f4f4f4;

    font-family: Arial, sans-serif;

}

.container {

    max-width: 700px;

    margin: 40px auto;

    padding: 20px;

}

h1 {

    margin-bottom: 30px;

}

.card {

    background: white;

    border-radius: 12px;

    padding: 24px;

    margin-bottom: 24px;

    box-shadow:
        0 2px 10px rgba(0,0,0,.08);

}

.card h2 {

    margin-top: 0;

    margin-bottom: 20px;

}

.setting-group {

    margin-bottom: 20px;

}

.setting-group>label {

    display: block;

    font-weight: bold;

    margin-bottom: 10px;

}

.radio-group {

    display: flex;

    gap: 24px;

}

.setting-row {

    display: flex;

    gap: 20px;

}

.setting-row label {

    flex: 1;

}

.setting-row input {

    width: 100%;

    margin-top: 6px;

    box-sizing: border-box;

}

#scramble {

    width: 100%;

    box-sizing: border-box;

    margin-top: 8px;

    margin-bottom: 24px;

    font-family: monospace;

}

#start-button {

    width: 100%;

    padding: 16px;

    font-size: 22px;

    font-weight: bold;

    margin-bottom: 24px;

}

#timer {

    text-align: center;

    font-size: 54px;

    font-weight: bold;

    margin-bottom: 24px;

}

#solution {

    background: #f8f8f8;

    padding: 16px;

    border-radius: 8px;

    white-space: pre-wrap;

    font-family: monospace;

    min-height: 180px;

}