body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(120deg, #e0c3fc 0%, #8ec5fc 100%);
}

.container {
    max-width: 1500px;
    margin: 80px auto;
    padding: 50px 30px;
    background: #ffffd6;
    border-radius: 15px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08)
}

.output-container {
    margin-top: 30px;
    padding: 20px;
    background-color: #a9dadd;
    border: 2px dashed #a0c6e1;
    border-radius: 10px;
    font-family: monospace;
    font-size: 1rem;
    white-space: pre-line;
    color: #333;
}

.placeholder {
    width: 97%;
    padding: 12px;
    font-size: 1rem;
    border-radius: 8px;
    border: 1px solid #ccc;
    text-align: center;
}

.placeholder::placeholder {
    text-align: center;
    color: #999;
}

.button {
    width: 100%; 
    padding: 14px;
    font-size: 1.1rem;
    font-weight: bold;
    background-color: #bb80e6;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    text-align: center;
}

.button:hover {
    background-color: #5a189a;
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}