body {
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}
.container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    max-width: 600px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 15px;
}
h2 {
    text-align: center;
    color: #333;
}
label {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 5px;
    display: block;
}
input[type="text"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #ccc;
    font-size: 14px;
}
textarea {
    resize: none;
}
.flex-row {
    display: flex;
    gap: 10px;
}
.flex-row div {
    flex: 1;
}
.options {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: #f0f9ff;
    padding: 10px;
    border-radius: 8px;
}
.buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}
button {
    padding: 10px 15px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    color: white;
}
#generate { background: #2dce89; }
#sample { background: #11cdef; }
#reset { background: #f5365c; }
#copy { background: #5e72e4; width: 100%; }
button:hover {
    opacity: 0.9;
}