body {
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 700px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

th, td {
    padding: 6px 8px;
    border-bottom: 1px solid #ddd;
}

input, select {
    padding: 6px;
    margin-bottom: 8px;
    width: 100%;
    box-sizing: border-box;
}

button {
    padding: 6px 10px;
    font-size: 14px;
    border: none;
    background: #2c7be5;
    color: white;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background: #1a5fc1;
}

.total {
    font-weight: bold;
    margin-top: 10px;
}

.success {
    color: green;
    font-weight: bold;
}

.flex-row {
    display: flex;
    gap: 20px;
}

@media (max-width: 768px) {
    .flex-row {
        flex-direction: column;
    }
}