body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    padding: 20px;
}
.container {
    max-width: 1000px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1 {
    text-align: center;
}
.form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}
.form input {
    padding: 10px;
    flex: 1 1 180px;
    border: 1px solid #ccc;
    border-radius: 8px;
}
.form button, .pdf-btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
}
.pdf-btn {
    text-decoration: none;
    display: inline-block;
    margin-left: auto;
}
table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: 8px;
    text-align: center;
    border-bottom: 1px solid #ddd;
}
input[type="text"], input[type="number"] {
    width: 100px;
}
button {
    background: #28a745;
    border: none;
    color: white;
    padding: 5px 10px;
    border-radius: 6px;
    cursor: pointer;
}
a {
    text-decoration: none;
    padding: 5px 8px;
    border-radius: 6px;
    color: white;
    background: #dc3545;
}
@media (max-width: 768px) {
    .form {
        flex-direction: column;
    }
    input[type="text"], input[type="number"] {
        width: 100%;
    }
    table, tr, td, th {
        font-size: 12px;
    }
}