*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Device setup page ────────────────────────────────────────────────── */
#setup {
  max-width: 420px; margin: 6rem auto; padding: 2rem;
  background: #1a1a2a; border-radius: .6rem; text-align: center;
}
#setup h2 { margin-bottom: 1rem; color: #9ab; }
#setup p  { margin-bottom: 1.2rem; color: #aaa; font-size: .95rem; }
#setup input {
  width: 100%; padding: .6rem .8rem; margin-bottom: .8rem;
  background: #1e1e1e; color: #ddd; border: 1px solid #444;
  border-radius: .4rem; font-size: 1rem;
}
#setup button {
  padding: .6rem 1.4rem; background: #2a4a7a; color: #ddf;
  border: none; border-radius: .4rem; cursor: pointer; font-size: 1rem;
}
#setup button:hover { background: #3a5a8a; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #111;
  color: #ddd;
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

#app {
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  height: 100%;
}

#header {
  padding: .7rem 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: #9ab;
  border-bottom: 1px solid #2a2a2a;
  flex-shrink: 0;
}

#timeline {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.msg {
  padding: .5rem .75rem;
  border-radius: .4rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg .role {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-right: .5em;
  opacity: .6;
}

.msg.owner { background: #1e2235; }
.msg.assistant { background: #1a2a1a; }
.msg.error { background: #2a1a1a; color: #f88; }

.evidence {
  font-size: .8rem;
  color: #7ab;
  margin: .1rem 0 .1rem 1rem;
  padding-left: .5rem;
  border-left: 2px solid #345;
}

#status-bar {
  font-size: .75rem;
  color: #567;
  padding: .3rem 1rem;
  flex-shrink: 0;
  min-height: 1.5rem;
}

#composer {
  display: flex;
  gap: .5rem;
  padding: .75rem 1rem;
  border-top: 1px solid #2a2a2a;
  flex-shrink: 0;
}

#msg {
  flex: 1;
  padding: .55rem .75rem;
  background: #1e1e1e;
  color: #ddd;
  border: 1px solid #333;
  border-radius: .4rem;
  font-size: 1rem;
  outline: none;
}
#msg:focus { border-color: #456; }

#send-btn {
  padding: .55rem 1.1rem;
  background: #2a4a7a;
  color: #ddf;
  border: none;
  border-radius: .4rem;
  cursor: pointer;
  font-size: .95rem;
}
#send-btn:hover { background: #3a5a8a; }
#send-btn:disabled { opacity: .4; cursor: default; }