#tasarim-kapsayici {
    display: flex;
    gap: 30px;
    max-width: 1200px;
    margin: 40px auto;
    font-family: sans-serif;
}
.tasarim-sol {
    width: 30%;
}
.tasarim-sag {
    width: 70%;
    position: relative;
}
#tasarim-canvas {
    width: 100%;
    border: 1px solid #ccc;
    background-color: #fdfdfd;
}
.controls select,
.controls input {
    width: 100%;
    padding: 8px;
    margin-bottom: 15px;
}
button {
    padding: 10px 20px;
    background: #222;
    color: #fff;
    border: none;
    cursor: pointer;
}