/* CHAT-20260908. An opaque reading surface in the existing stone / sea palette.
   Deliberately scoped: no world geometry, scene materials or global theme changes. */
.proximity-chat {
  --chat-paper: #f6f2e9;
  --chat-ink: #253e38;
  --chat-muted: #65716a;
  --chat-line: #dcded3;
  --chat-sea: #315c50;
  position: fixed;
  z-index: 80;
  inset: auto 24px 76px auto;
  display: flex;
  flex-direction: column;
  width: min(420px, calc(100vw - 88px));
  height: min(680px, calc(100dvh - 100px));
  max-height: none;
  min-height: 0;
  overflow: hidden;
  color: var(--chat-ink);
  border: 1px solid #d6d5c7;
  border-radius: 18px;
  background: var(--chat-paper);
  box-shadow: 0 20px 70px #10221d38, 0 2px 6px #10221d14;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms;
  font: 14px/1.5 Arial, Helvetica, sans-serif;
  text-shadow: none;
}
.proximity-chat.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
}
.proximity-chat > .chat-header {
  display: flex;
  flex: 0 0 auto;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 22px 20px 10px 24px;
  border: 0;
}
.chat-heading { min-width: 0; }
.chat-eyebrow {
  display: block;
  margin: 0 0 7px;
  color: #756543;
  font: 700 9px/1.4 Arial, Helvetica, sans-serif;
  letter-spacing: .15em;
}
.chat-heading h2 {
  margin: 0;
  color: var(--chat-ink);
  font: 400 30px/1.15 Georgia, "Times New Roman", serif;
  letter-spacing: -.035em;
}
.proximity-chat .chat-close {
  display: grid;
  flex: 0 0 44px;
  place-items: center;
  width: 44px;
  height: 44px;
  min-height: 44px;
  padding: 0;
  border: 1px solid var(--chat-line);
  border-radius: 50%;
  color: #657068;
  background: transparent;
  font: 400 24px/1 Arial, Helvetica, sans-serif;
  cursor: pointer;
}
.proximity-chat .chat-close:hover { color: var(--chat-ink); background: #eae9df; }
.proximity-chat .chat-radius-state {
  display: block;
  flex: 0 0 auto;
  margin: 0;
  padding: 0 24px 5px;
  color: var(--chat-muted);
  font: 12px/1.5 Arial, Helvetica, sans-serif;
  letter-spacing: 0;
  text-transform: none;
}
.proximity-chat .chat-route-state {
  display: block;
  flex: 0 0 auto;
  margin: 0;
  padding: 0 24px 16px;
  color: var(--chat-sea);
  font: 600 12px/1.5 Arial, Helvetica, sans-serif;
  letter-spacing: 0;
}
.proximity-chat .chat-residents {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  flex: 0 0 auto;
  gap: 6px;
  margin: 0;
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--chat-line);
  overflow: visible;
}
.proximity-chat .chat-resident {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 3px;
  min-width: 0;
  min-height: 56px;
  margin: 0;
  padding: 9px 10px;
  color: var(--chat-ink);
  background: #eeece2;
  border: 1px solid transparent;
  border-radius: 10px;
  text-align: left;
  text-transform: none;
  cursor: pointer;
}
.proximity-chat .chat-resident + .chat-resident { border-top-color: transparent; }
.proximity-chat .chat-resident:hover { background: #e5e8dc; }
.proximity-chat .chat-resident[aria-pressed="true"] {
  background: #e1e9df;
  border-color: #789485;
  box-shadow: inset 0 0 0 1px #789485;
}
.proximity-chat .chat-resident strong {
  color: var(--chat-ink);
  font: 600 12px/1.3 Arial, Helvetica, sans-serif;
}
.proximity-chat .chat-resident-state {
  color: var(--chat-muted);
  font: 11px/1.4 Arial, Helvetica, sans-serif;
  letter-spacing: 0;
  text-transform: none;
}
.proximity-chat .chat-resident[aria-pressed="true"] .chat-resident-state { color: #315c50; }
.proximity-chat .chat-messages {
  flex: 1 1 auto;
  min-height: 72px;
  max-height: none;
  margin: 0;
  padding: 20px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: #b2bdb0 transparent;
  scroll-padding: 16px;
}
.proximity-chat .chat-empty {
  display: grid;
  place-content: center;
  gap: 10px;
  min-height: 100%;
  margin: 0;
  padding: 14px 12px;
  color: var(--chat-muted);
  font: 14px/1.65 Arial, Helvetica, sans-serif;
  text-align: center;
}
.proximity-chat .chat-empty::before {
  content: "···";
  display: grid;
  place-items: center;
  justify-self: center;
  width: 46px;
  height: 38px;
  margin-bottom: 2px;
  color: #668273;
  border: 1px solid #cbd7c7;
  border-radius: 14px 14px 14px 3px;
  font: 700 24px/1 Georgia, serif;
  letter-spacing: 3px;
}
.proximity-chat .chat-message {
  width: fit-content;
  max-width: 94%;
  margin: 0 0 16px;
  padding: 12px 14px;
  color: var(--chat-ink);
  border: 1px solid #e4e1d5;
  border-radius: 3px 12px 12px;
  background: #fffdf8;
}
.proximity-chat .chat-message.is-self {
  margin-left: auto;
  background: #e2eadf;
  border-color: #d2ddce;
  border-radius: 12px 3px 12px 12px;
}
.proximity-chat .chat-message.is-resident {
  background: #fffdf8;
  border: 1px solid #e4e1d5;
  border-left: 3px solid #b8995d;
}
.proximity-chat .chat-message strong,
.proximity-chat .chat-message.is-resident strong {
  display: block;
  margin: 0 0 5px;
  color: #58664f;
  font: 700 11px/1.4 Arial, Helvetica, sans-serif;
  letter-spacing: .01em;
  text-transform: none;
}
.proximity-chat .chat-message p {
  margin: 0;
  color: var(--chat-ink);
  font: 14px/1.65 Arial, Helvetica, sans-serif;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}
.proximity-chat .chat-message.is-verified strong::before { color: #84612d; }
.proximity-chat .chat-request-status,
.proximity-chat .chat-resident-thinking {
  flex: 0 0 auto;
  margin: 0;
  padding: 10px 24px;
  color: #526d5b;
  background: #eaf0e5;
  font: 12px/1.5 Arial, Helvetica, sans-serif;
}
.proximity-chat .chat-request-status:empty { display: none; }
.proximity-chat .chat-error {
  flex: 0 0 auto;
  margin: 0 20px 10px;
  padding: 12px 14px;
  color: #6c4833;
  border: 1px solid #d9bba3;
  border-radius: 10px;
  background: #f3e8dc;
  font: 12px/1.5 Arial, Helvetica, sans-serif;
}
.proximity-chat .chat-error[hidden] { display: none; }
.proximity-chat .chat-error-text { display: block; }
.proximity-chat .chat-retry {
  min-height: 44px;
  margin-top: 6px;
  padding: 8px 12px;
  border: 1px solid #c5a588;
  border-radius: 8px;
  background: #fff9f1;
  color: #66452e;
  font: 600 12px/1.3 Arial, Helvetica, sans-serif;
  cursor: pointer;
}
.proximity-chat .chat-form {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  flex: 0 0 auto;
  align-items: end;
  gap: 8px;
  margin: 0;
  padding: 14px 20px 10px;
  border-top: 1px solid var(--chat-line);
  background: var(--chat-paper);
}
.proximity-chat .chat-input {
  display: block;
  width: 100%;
  min-width: 0;
  min-height: 76px;
  max-height: 140px;
  padding: 11px 12px;
  color: var(--chat-ink);
  border: 1px solid #bdc6b7;
  border-radius: 10px;
  outline: none;
  background: #fffdf9;
  font: 14px/1.5 Arial, Helvetica, sans-serif;
  resize: none;
}
.proximity-chat .chat-input::placeholder { color: #6b776c; opacity: 1; }
.proximity-chat .chat-input:focus { border-color: #527766; box-shadow: 0 0 0 3px #52776620; }
.proximity-chat .chat-input:disabled { color: #6d756a; background: #eeeee5; cursor: not-allowed; }
.proximity-chat .chat-send {
  width: auto;
  min-width: 44px;
  min-height: 44px;
  padding: 12px;
  border: 1px solid var(--chat-sea);
  border-radius: 10px;
  color: #fffdf5;
  background: var(--chat-sea);
  font: 600 12px/1.5 Arial, Helvetica, sans-serif;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
}
.proximity-chat .chat-send:hover:not(:disabled) { background: #244b3f; }
.proximity-chat .chat-send:disabled { opacity: 1; color: #707969; background: #e1e5da; border-color: #d5dbcd; cursor: not-allowed; }
.proximity-chat .chat-privacy {
  flex: 0 0 auto;
  margin: 0;
  padding: 0 24px 18px;
  color: #687264;
  font: 11px/1.5 Arial, Helvetica, sans-serif;
}
.proximity-chat .chat-diagnostics {
  flex: 0 0 auto;
  margin: 0 24px 8px;
  padding: 5px 10px 9px;
  border: 1px solid var(--chat-line);
  border-radius: 10px;
  background: #eeeee5;
}
.proximity-chat .chat-diagnostics-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  color: var(--chat-ink);
  font: 600 11px/1.4 Arial, Helvetica, sans-serif;
  cursor: pointer;
}
.proximity-chat .chat-diagnostics-consent {
  flex: 0 0 17px;
  width: 17px;
  height: 17px;
  margin: 0;
  accent-color: var(--chat-sea);
  cursor: pointer;
}
.proximity-chat .chat-diagnostics-consent:disabled { cursor: not-allowed; }
.proximity-chat .chat-diagnostics-consent:focus-visible { outline: 3px solid #51796b; outline-offset: 3px; }
.proximity-chat .chat-diagnostics-policy,
.proximity-chat .chat-diagnostics-state {
  margin: 0;
  color: #576455;
  font: 10px/1.45 Arial, Helvetica, sans-serif;
}
.proximity-chat .chat-diagnostics-state { margin-top: 5px; color: #315c50; }
.proximity-chat .chat-input-hint {
  flex: 0 0 auto;
  margin: 0;
  padding: 0 24px 7px;
  color: #727b6d;
  font: 10px/1.4 Arial, Helvetica, sans-serif;
}
.proximity-chat .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.proximity-chat button:focus-visible { outline: 3px solid #51796b; outline-offset: 3px; }
.chat-toggle[aria-expanded="true"] { opacity: 1; color: #f5eedc; background: #315c50; border-color: #749582; }
/* Inactive panels must neither appear behind the chat nor remain keyboard targets. */
.world-inspector:not(.is-open), .mesto-identity:not(.is-open) { visibility: hidden; }
@media (max-width: 620px) {
  .proximity-chat {
    inset: max(12px, env(safe-area-inset-top)) max(12px, env(safe-area-inset-right)) calc(64px + env(safe-area-inset-bottom)) max(12px, env(safe-area-inset-left));
    width: auto;
    height: auto;
    max-height: none;
    border-radius: 16px;
  }
  .proximity-chat > .chat-header { padding: 18px 16px 10px 20px; }
  .chat-heading h2 { font-size: 28px; }
  .proximity-chat .chat-radius-state, .proximity-chat .chat-route-state { padding-inline: 20px; }
  .proximity-chat .chat-residents { padding-inline: 16px; }
  .proximity-chat .chat-resident { padding-inline: 8px; }
  .proximity-chat .chat-resident strong { font-size: 11px; }
  .proximity-chat .chat-messages { padding: 16px; }
  .proximity-chat .chat-form { padding-inline: 16px; }
  .proximity-chat .chat-diagnostics { margin-inline: 16px; }
  .proximity-chat .chat-input { font-size: 16px; }
  .proximity-chat .chat-privacy { padding-inline: 20px; }
}
@media (max-height: 560px) {
  .proximity-chat { overflow-y: auto; }
  .proximity-chat > .chat-header { padding-top: 12px; padding-bottom: 6px; }
  .chat-heading h2 { font-size: 23px; }
  .chat-eyebrow { display: none; }
  .proximity-chat .chat-radius-state { padding-bottom: 0; }
  .proximity-chat .chat-route-state { padding-bottom: 8px; }
  .proximity-chat .chat-residents { padding-bottom: 8px; }
  .proximity-chat .chat-resident { min-height: 44px; padding-block: 5px; }
  .proximity-chat .chat-input { min-height: 54px; }
  .proximity-chat .chat-form { padding-top: 8px; }
  .proximity-chat .chat-privacy { padding-bottom: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  .proximity-chat { transition: none; }
}