/* Global body styling */
body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f9f9f9;
    padding: 20px;
    color: #333;
}

/* Container box */
.container {
    max-width: 700px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    text-align: center;
}

/* Headings */
h1 {
    color: #222;
    margin-bottom: 20px;
}

/* Upload form */
form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* File input */
input[type="file"] {
    padding: 10px;
}

/* Preset selection */
.preset-options {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 10px;
}

.preset-option {
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 8px;
    padding: 5px;
    transition: 0.3s;
    text-align: center;
    width: 120px;
    background: #fafafa;
}

.preset-option.selected {
    border-color: #4CAF50;
    background: #f0fff0;
}

.preset-option img {
    width: 100%;
    border-radius: 5px;
    margin-bottom: 5px;
}

/* Submit button */
button {
    padding: 12px;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
}

button:hover {
    background: #45a049;
}