body {
    background-image: url(tlo.jpg);
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
    color: #333;
}

#box {
    max-width: 500px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.15); /* Przezroczystość */
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

#main {
    text-align: center;
}

h2 {
    color: #2c3e50;
    margin-bottom: 20px;
}

.input-group {
    margin-bottom: 15px;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 16px;
}

.checkbox-group {
    margin: 15px 0;
    text-align: center;
}

.checkbox-row {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 8px;
}

.checkbox-option {
    display: flex;
    align-items: center;
}

.checkbox {
    margin-right: 5px;
}

button {
    background-color: #3498db;
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
    margin-top: 10px;
}

button:hover {
    background-color: #2980b9;
}

#pokaz {
    margin-top: 25px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.15); /* Przezroczystość */
    
    border-radius: 4px;
    border-left: 4px solid #3498db;
    text-align: left;
}

#pokaz h3 {
    margin-top: 0;
    color: #2c3e50;
}

#pokaz ul {
    padding-left: 20px;
}

#copy {
    margin-top: 30px;
    font-size: 0.8em;
    color: #7f8c8d;
}

.error {
    color: #e74c3c;
    font-weight: bold;
}