body {
    background: #f4f6f8;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

h3 {
    font-weight: bold;
}

.card {
    max-width: 600px;
    margin: 50px auto;
    border-radius: 16px;
    border: none;
    background-color: #ffffff;
}

label.form-label {
    font-weight: 500;
}

input[type="file"],
input[type="number"],
select.form-select {
    border-radius: 8px;
    box-shadow: none;
    border: 1px solid #ced4da;
    transition: border-color 0.3s ease-in-out;
}

input[type="file"]:focus,
input[type="number"]:focus,
select.form-select:focus {
    border-color: #4b89dc;
    outline: none;
}

button[type="submit"] {
    border-radius: 8px;
    font-weight: 600;
    padding: 10px 0;
    font-size: 1.05rem;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

button[type="submit"]:hover {
    background-color: #218838;
}

#preview {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.preview-img {
    max-width: 100px;
    max-height: 100px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid #ddd;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

footer {
    margin-top: 50px;
    padding: 10px 0;
    font-size: 0.9rem;
}