body {
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    margin: 0;
    padding: 20px;
}

.container {
    background: white;
    max-width: 1100px;
    margin: auto;
    padding: 20px;
    border-radius: 6px;
}

h1 {
    margin-bottom: 20px;
}

.block {
    margin-bottom: 20px;
}

label {
    font-weight: bold;
}

select, input {
    padding: 6px;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}

th {
    background: #f0f0f0;
}

button {
    padding: 6px 10px;
    cursor: pointer;
}

#addLine {
    margin-top: 10px;
}

.delete {
    background: #ff4d4d;
    color: white;
    border: none;
}

.totals {
    text-align: right;
    margin-top: 20px;
}

.totals .grand {
    font-size: 18px;
    font-weight: bold;
}