:root { color-scheme: light dark; font: 16px/1.6 system-ui, sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 800px; height: 100dvh; margin: auto; padding: 12px; padding-bottom: max(12px, env(safe-area-inset-bottom)); display: flex; flex-direction: column; }
header, #compose { display: flex; align-items: center; gap: 8px; }
header { flex-wrap: wrap; padding-bottom: 12px; border-bottom: 1px solid #8885; }
header form { margin-left: auto; }
#usage { display: flex; flex-wrap: wrap; gap: 4px 16px; padding-top: 8px; font-size: 14px; }
#usage small { opacity: .65; }
button, select, textarea, .login a { font: inherit; border: 1px solid #8887; border-radius: 6px; padding: 8px; background: transparent; color: inherit; }
button, select { cursor: pointer; }
button:disabled { opacity: .5; cursor: wait; }
select { min-width: 0; flex: 1; max-width: 300px; }
#messages { flex: 1; overflow-y: auto; padding: 16px 0; }
.message { white-space: pre-wrap; overflow-wrap: anywhere; margin: 0 0 20px; }
.message.user { background: #8882; border-radius: 6px; padding: 10px; }
.message strong { display: block; font-size: 12px; opacity: .65; margin-bottom: 4px; }
#status { min-height: 24px; margin: 4px 0; font-size: 14px; }
textarea { flex: 1; min-width: 0; resize: vertical; max-height: 180px; }
@media (max-width: 480px) {
  #compose { flex-wrap: wrap; }
  #compose textarea { flex-basis: 100%; }
  #send { margin-left: auto; }
}
.login { height: auto; padding-top: 20vh; align-items: center; }
.login a { text-decoration: none; }