body {
    background: #f4f6f8;
    font-family: Arial, sans-serif;
    font-size: 14px;
    margin: 0;
    padding: 0;
}

.container {
    width: 100%;
    max-width: 500px; /* desktop */
    margin: 20px auto;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

h3 {
    text-align: center;
    margin-bottom: 20px;
    color: #2c3e50;
}

h4 {
    margin-top: 20px;
    color: #34495e;
}

label {
    display: block;
    margin-top: 10px;
    font-weight: bold;
    color: #555;
}

input[type="text"],
input[type="number"],
input[type="date"] {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 15px;
}

input:focus {
    border-color: #3498db;
    outline: none;
}

.barang-item {
    background: #f9f9f9;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
}

.btn {
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    cursor: pointer;
}

.btn.tambah {
    background: #3498db;
    color: white;
}

.btn.tambah:hover {
    background: #2980b9;
}

.btn.total {
    background: #f39c12;
    color: #fff;
}

.btn.total:hover {
    background: #d68910;
}

.btn.cetak {
    background: #27ae60;
    color: white;
}

.btn.cetak:hover {
    background: #1e8449;
}

hr {
    border: none;
    border-top: 1px dashed #ccc;
    margin: 15px 0;
}

.total-box {
    margin-top: 15px;
    padding: 14px;
    background: #ecf0f1;
    border-left: 5px solid #27ae60;
    font-size: 16px;
    border-radius: 4px;
}

/* 📱 MOBILE KHUSUS */
@media (max-width: 480px) {
    .container {
        margin: 10px;
        padding: 15px;
    }

    h3 {
        font-size: 18px;
    }

    .btn {
        font-size: 16px;
        padding: 14px;
    }
}