input.quantity-input {
    width: 64px;
    min-width: 0;
    height: 44px;
    box-sizing: border-box;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    padding: 0 6px;
    background: var(--paper-0);
    font: 600 16px var(--font-mono);
    color: var(--ink-900);
    text-align: center;
}
input.quantity-input:focus-visible {
    outline: 2px solid var(--rust-500);
    outline-offset: -2px;
}
input.quantity-input[aria-invalid="true"] { border-color: var(--danger-700); }
[data-quantity-control] .qty-btn { min-width: 44px; min-height: 44px; flex-shrink: 0; }
[data-quantity-control] .qty-btn:disabled { opacity: .45; cursor: default; }