* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: #1c1c1c;
  background: #f6f7f9;
}
/* Echte (dynamische) Viewport-Hoehe: auf iOS beruecksichtigt 100dvh die
   ein-/ausblendende Browserleiste; 100vh als Fallback fuer aeltere Browser. */
#layout { display: flex; height: 100vh; height: 100dvh; overflow: hidden; }

#menu {
  width: 240px;
  flex-shrink: 0;
  overflow-y: auto;
  background: #1f2933;
  color: #e4e7eb;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
#menu h2 { font-size: 1.1rem; margin: 0; }
#menu h3 { font-size: 0.9rem; margin: 0 0 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; }
#menu a { color: #9fd3ff; }
#identity { font-size: 0.9rem; }
.muted { color: #7b8794; font-size: 0.85rem; }
.hidden { display: none; }

#user-list { list-style: none; padding: 0; margin: 0 0 0.5rem; font-size: 0.85rem; }
#user-list li { padding: 0.15rem 0; border-bottom: 1px solid #323f4b; }

#chat { flex: 1; min-height: 0; display: flex; flex-direction: column; padding: 1rem; max-width: 820px; margin: 0 auto; width: 100%; }
/* min-height:0 erlaubt dem Flex-Kind zu schrumpfen -> nur DIESER Bereich scrollt. */
#messages {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding-bottom: 0.5rem;
}

.msg { padding: 0.6rem 0.8rem; border-radius: 0.8rem; max-width: 80%; white-space: pre-wrap; line-height: 1.4; }
.msg.user { align-self: flex-end; background: #2b6cb0; color: #fff; }
.msg.assistant { align-self: flex-start; background: #fff; border: 1px solid #e1e4e8; }
.msg.system { align-self: center; background: #fdf3d7; border: 1px solid #f0d98c; font-size: 0.85rem; }
.msg.emergency { align-self: center; background: #fde0e0; border: 1px solid #f5a3a3; font-weight: 600; }

/* Eingabe + Mic bleiben immer sichtbar (fester Fuss des Chat-Bereichs). */
#prompt-form { display: flex; gap: 0.5rem; align-items: center; flex-shrink: 0; padding-top: 0.5rem; }
#prompt { flex: 1; padding: 0.7rem; border: 1px solid #cbd2d9; border-radius: 0.6rem; font-size: 1rem; }
button { padding: 0.7rem 1rem; border: none; border-radius: 0.6rem; background: #2b6cb0; color: #fff; font-size: 1rem; cursor: pointer; }
button:disabled { opacity: 0.5; cursor: default; }
#mic { background: #2f855a; }
#mic.recording { background: #c53030; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.6; } }
#status { min-height: 1.2rem; margin-top: 0.4rem; flex-shrink: 0; }

@media (max-width: 640px) {
  #layout { flex-direction: column; }
  /* Menue als kompakte, nicht scrollende Kopfleiste; der Chat fuellt den Rest. */
  #menu {
    width: 100%;
    flex-shrink: 0;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
  }
  #menu h2 { flex: 1; font-size: 1rem; }
  #menu h3 { display: none; }
  #admin { width: 100%; order: 3; }
  #chat { flex: 1; min-height: 0; padding: 0.6rem; }
}