.random-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.mode {
    margin-bottom: 2em;
    padding: 1em;
    background: #f1f1f1;
    border-radius: 8px;
}

input[type="number"] {
    margin: 0.5em;
    padding: 0.5em;
    width: 140px;
    font-size: 1em;
    border: 1px solid #ccc;
    border-radius: 6px;
}

label {
    display: block;
    margin-bottom: 1em;
    font-weight: bold;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 1em;
}

.buttons button,
.mode button {
    padding: 0.6em 1.2em;
    font-size: 1em;
    border: none;
    border-radius: 8px;
    background: #4a90e2;
    color: white;
    cursor: pointer;
    transition: background 0.3s;
}

.buttons button:hover,
.mode button:hover {
    background: #357ab8;
}

.output {
    margin-top: 2em;
    font-family: monospace;
    white-space: pre-wrap;
    background: #fff;
    padding: 1em;
    border-radius: 8px;
    box-shadow: 0 0 5px #ccc;
}