Dark surfaces — elevation steps up by getting lighter, not by shadow
bg
#0B0F1A
app canvas
surface
#111827
header / panel
card
#1A2235
card / row
card-2
#1F2A3E
elevated / hover
border · rgba(255,255,255,.07)
hairline divider
border-teal · rgba(23,168,194,.2)
accent / focus ring