* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", Arial, sans-serif;
}

body {
    background: #0f172a;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.customer-screen {
    width: 100%;
    max-width: 800px;
    background: #111827;
    border: 1px solid #1f2937;
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.logo {
    text-align: center;
}

.logo img {
    width: 140px;
}

.welcome {
    text-align: center;
}

.welcome h1 {
    font-size: 36px;
    color: #3b82f6;
}

.welcome p {
    color: #9ca3af;
    font-size: 18px;
}

.cart {
    background: #1f2937;
    border-radius: 16px;
    padding: 20px;
    max-height: 350px;
    overflow-y: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    border-bottom: 2px solid #374151;
    padding: 12px;
    text-align: left;
    color: #60a5fa;
    font-size: 18px;
}

td {
    padding: 12px;
    border-bottom: 1px solid #374151;
    font-size: 18px;
}

.total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #1f2937;
    padding: 20px 30px;
    border-radius: 16px;
    border: 1px solid #2563eb;
}

.total h2 {
    font-size: 28px;
}

.total .price {
    font-size: 36px;
    font-weight: bold;
    color: #22c55e;
}

.message {
    text-align: center;
    color: #9ca3af;
    font-style: italic;
    font-size: 18px;
}