/* ==============================================
   LAYOUT — CSS Grid mit benannten Zonen
   Desktop:  Banner | Seite-Chat-Seite | Footer
   Mobil:    Mini-Banner | Chat
   ============================================== */

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

body {
  height: 100vh;
  overflow: hidden;
  background: var(--bg-deep);
  font-family: var(--font-body);
  color: var(--text-bright);
}

/* === GRID-CONTAINER === */
#app {
  position: relative;
  z-index: 1;
  height: 100vh;
  overflow: hidden;
  display: grid;
  grid-template-areas:
    "banner  banner  banner"
    "left    chat    right"
    "footer  footer  footer";
  grid-template-columns: 1fr minmax(320px, var(--chat-max-width)) 1fr;
  grid-template-rows: auto 1fr auto;
}

/* === ZONEN === */
.zone-banner {
  grid-area: banner;
  text-align: center;
  padding: 0;
  overflow: hidden;
}

.zone-left {
  grid-area: left;
  min-width: 0;
}

.zone-right {
  grid-area: right;
  min-width: 0;
}

.zone-chat {
  grid-area: chat;
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-width: var(--chat-max-width);
  width: 100%;
  position: relative;
}

.zone-footer {
  grid-area: footer;
  text-align: center;
  padding: var(--space-xs) var(--space-md);
  border-top: 1px solid var(--border-light);
}

.version-tag {
  font-family: var(--font-display);
  font-size: 9px;
  color: var(--text-faint);
  letter-spacing: 0.1em;
}

/* === SEITENBEREICHE (Desktop-Atmosphäre) === */
.zone-left,
.zone-right {
  overflow: hidden;
}

/* === RESPONSIVE === */

@media (max-width: 768px) {
  #app {
    grid-template-areas:
      "banner"
      "chat";
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }

  .zone-left,
  .zone-right,
  .zone-footer {
    display: none;
  }

  .zone-banner {
    padding: 0;
  }
}

@media (min-width: 1200px) {
  .zone-left,
  .zone-right {
    min-width: var(--side-min-width);
  }
}