body {
    background-color: #f5f5f5;
}
.app-container {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.total-box {
    background-color: #212529;
    color: #fff;
    border-radius: 0.75rem;
    padding: 0.75rem 1rem;
}
.total-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    opacity: 0.8;
}
.total-amount {
    font-size: 2rem;
    font-weight: 600;
    text-align: right;
}
.items-list {
    flex: 1;
    overflow-y: auto;
    margin-top: 0.75rem;
    margin-bottom: 0.75rem;
}
.item-row {
    background-color: #fff;
    border-radius: 0.75rem;
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.item-desc {
    font-size: 0.95rem;
    font-weight: 500;
}
.item-detail {
    font-size: 0.8rem;
    color: #6c757d;
}
.footer-actions {
    position: sticky;
    bottom: 0;
    background: #f5f5f5;
    padding: 0.5rem 0 0.75rem 0;
}
.btn-full {
    width: 100%;
}
.btn-icon {
    border-radius: 50%;
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
/* Teclado numérico simple */
.keypad button {
    width: 100%;
    height: 48px;
    font-size: 1.1rem;
}