body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    background: #f4f5f7;
    color: #333;
}
nav {
    background: #4f46e5;
    padding: 0.8rem 1.5rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}
nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}
nav a:hover, nav a.active {
    text-decoration: underline;
}
.container {
    max-width: 1100px;
    margin: 1.5rem auto;
    padding: 0 1rem;
}
.two-col {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 1.5rem;
}
.card {
    background: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}
th, td {
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid #e2e8f0;
    text-align: left;
}
th {
    background: #f8fafc;
    font-weight: 700;
}
input, select, button, .btn {
    padding: 0.5rem 0.8rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 0.9rem;
    margin: 0.2rem 0;
}
button, .btn {
    cursor: pointer;
    background: #4f46e5;
    color: #fff;
    border: none;
    text-decoration: none;
    display: inline-block;
}
.btn.small {
    padding: 0.3rem 0.5rem;
    font-size: 0.8rem;
}
.btn.danger { background: #dc2626; }
.btn.cancel { background: #6b7280; }
.login-box {
    max-width: 360px;
    margin: 80px auto;
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-align: center;
}
.login-box input {
    width: 100%;
    margin-bottom: 1rem;
}
.error { color: #dc2626; font-weight: bold; }
.totals {
    margin: 1rem 0;
    font-size: 0.95rem;
}
.grand {
    font-weight: 700;
    font-size: 1.1rem;
    border-top: 2px solid #333;
    padding-top: 0.5rem;
}
.cart-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
@media (max-width: 768px) {
    .two-col { grid-template-columns: 1fr; }
}