/* ==========================================================================
   chat.css - Chat interno cliente ↔ contador (Material Design 3)
   ==========================================================================
   Usado em:
     - /rastreio.php           (cliente visualiza a conversa com o contador)
     - /admin/regularizacao.php (contador visualiza a conversa com o cliente)
   ========================================================================== */

/* Card do chat */
.chat {
  display: flex;
  flex-direction: column;
  /* Altura mínima para que a área de mensagens tenha scroll em telas
     pequenas e o input fique sempre visível em telas grandes */
  min-height: 480px;
  max-height: 640px;
  padding: 0;
  overflow: hidden;
}
.chat__header {
  display: flex;
  align-items: center;
  gap: var(--md-space-3);
  padding: var(--md-space-4) var(--md-space-5);
  border-bottom: 1px solid var(--md-outline-variant);
  background: var(--md-surface);
  flex-shrink: 0;
}
.chat__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.chat__avatar--admin {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}
.chat__titulo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}
.chat__titulo strong {
  font: 600 1rem/1.2 var(--md-font-display);
  color: var(--md-on-surface);
}
.chat__titulo span {
  font: 500 0.78rem/1.2 var(--md-font-body);
  color: var(--md-on-surface-variant);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.chat__status-dot {
  width: 8px;
  height: 8px;
  background: var(--md-secondary);
  border-radius: 50%;
  display: inline-block;
}
.chat__acoes {
  display: flex;
  align-items: center;
  gap: var(--md-space-2);
}
.chat__badge {
  background: var(--md-error);
  color: var(--md-on-error);
  font: 700 0.7rem/1 var(--md-font-body);
  padding: 4px 8px;
  border-radius: var(--md-radius-pill);
  min-width: 20px;
  text-align: center;
}

/* Lista de mensagens (scroll vertical) */
.chat__lista {
  flex: 1;
  overflow-y: auto;
  padding: var(--md-space-4) var(--md-space-5);
  background: var(--md-surface-container-low);
  display: flex;
  flex-direction: column;
  gap: var(--md-space-3);
  scroll-behavior: smooth;
}
/* Scrollbar discreta (Webkit) */
.chat__lista::-webkit-scrollbar { width: 8px; }
.chat__lista::-webkit-scrollbar-track { background: transparent; }
.chat__lista::-webkit-scrollbar-thumb {
  background: var(--md-outline-variant);
  border-radius: 4px;
}
.chat__lista::-webkit-scrollbar-thumb:hover { background: var(--md-outline); }

/* Dia (separador) */
.chat__dia {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--md-space-2) 0;
}
.chat__dia span {
  font: 500 0.7rem/1 var(--md-font-body);
  color: var(--md-on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--md-surface-container);
  padding: 4px 10px;
  border-radius: var(--md-radius-pill);
}

/* Mensagem (bolha) */
.chat__msg {
  display: flex;
  flex-direction: column;
  max-width: 78%;
  gap: 4px;
  position: relative;
  animation: chat-fade-in 0.25s var(--md-easing-emphasized) both;
}
@keyframes chat-fade-in {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.chat__msg--cliente   { align-self: flex-end; }
.chat__msg--contador  { align-self: flex-start; }
.chat__msg--sistema   { align-self: center; max-width: 92%; }

/* Cabeçalho da bolha: nome + horário */
.chat__msg-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font: 500 0.72rem/1 var(--md-font-body);
  color: var(--md-on-surface-variant);
  padding: 0 6px;
}
.chat__msg--cliente  .chat__msg-meta { justify-content: flex-end; }
.chat__msg--contador .chat__msg-meta { justify-content: flex-start; }
.chat__msg-meta strong {
  font-weight: 600;
  color: var(--md-on-surface);
}
.chat__msg-meta .icon-check {
  color: var(--md-primary);
  margin-left: 2px;
}

/* Conteúdo da bolha (texto) */
.chat__bolha {
  padding: 10px 14px;
  border-radius: var(--md-radius-lg);
  font: 400 0.92rem/1.45 var(--md-font-body);
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: pre-wrap;
  box-shadow: var(--md-elev-1);
  position: relative;
}
.chat__msg--cliente .chat__bolha {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-bottom-right-radius: 4px;
}
.chat__msg--contador .chat__bolha {
  background: var(--md-on-primary-container);
  color: var(--md-on-primary);
  border-bottom-left-radius: 4px;
}
.chat__msg--sistema .chat__bolha {
  background: var(--md-tertiary-container);
  color: var(--md-on-tertiary-container);
  border-radius: var(--md-radius-pill);
  padding: 8px 16px;
  font: 500 0.85rem/1.4 var(--md-font-body);
  text-align: center;
  box-shadow: none;
}

/* Anexo dentro da bolha */
.chat__anexo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
  padding: 8px 10px;
  background: rgba(255,255,255,0.18);
  border-radius: var(--md-radius-md);
  text-decoration: none;
  color: inherit;
  font: 500 0.85rem/1.3 var(--md-font-body);
  transition: background 0.15s;
}
.chat__msg--contador .chat__anexo {
  background: rgba(255,255,255,0.12);
  color: var(--md-on-primary);
  border: 1px solid rgba(255,255,255,0.18);
}
.chat__anexo:hover { background: rgba(255,255,255,0.28); text-decoration: none; }
.chat__msg--contador .chat__anexo:hover { background: rgba(255,255,255,0.22); }
.chat__anexo-icone {
  width: 36px;
  height: 36px;
  border-radius: var(--md-radius-sm);
  background: rgba(255,255,255,0.20);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.chat__msg--cliente .chat__anexo-icone {
  background: var(--md-on-primary-container);
  color: var(--md-primary-container);
}
.chat__msg--contador .chat__anexo-icone {
  background: rgba(255,255,255,0.18);
  color: var(--md-on-primary);
}
.chat__anexo-info { display: flex; flex-direction: column; min-width: 0; }
.chat__anexo-info strong {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
}
.chat__anexo-info span {
  font: 500 0.72rem/1 var(--md-font-body);
  opacity: 0.85;
}

/* Footer com input e botão de enviar */
.chat__footer {
  display: flex;
  align-items: flex-end;
  gap: var(--md-space-2);
  padding: var(--md-space-3) var(--md-space-4);
  background: var(--md-surface);
  border-top: 1px solid var(--md-outline-variant);
  flex-shrink: 0;
}
.chat__input-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--md-surface-container);
  border-radius: var(--md-radius-lg);
  padding: 8px 12px;
  border: 1px solid transparent;
  transition: border-color 0.15s, background 0.15s;
}
.chat__input-wrap:focus-within {
  border-color: var(--md-primary);
  background: var(--md-surface);
}
.chat__anexo-preview {
  display: none;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  padding: 6px 10px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-radius: var(--md-radius-sm);
  font: 500 0.8rem/1.2 var(--md-font-body);
}
.chat__anexo-preview.is-visible { display: flex; }
.chat__anexo-preview strong {
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}
.chat__anexo-preview button {
  background: transparent;
  border: 0;
  cursor: pointer;
  color: inherit;
  display: inline-flex;
  align-items: center;
  padding: 2px;
  border-radius: 50%;
  margin-left: auto;
}
.chat__anexo-preview button:hover { background: rgba(0,0,0,0.08); }
.chat__textarea {
  width: 100%;
  resize: none;
  border: 0;
  background: transparent;
  font: 400 0.92rem/1.4 var(--md-font-body);
  color: var(--md-on-surface);
  outline: none;
  min-height: 24px;
  max-height: 120px;
  padding: 0;
}
.chat__textarea::placeholder { color: var(--md-on-surface-variant); }

.chat__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--md-primary);
  color: var(--md-on-primary);
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, transform 0.15s;
}
.chat__btn:hover:not([disabled]) { background: var(--md-primary-hover); }
.chat__btn:active:not([disabled]) { transform: scale(0.95); }
.chat__btn[disabled] {
  background: var(--md-surface-container-high);
  color: var(--md-on-surface-variant);
  cursor: not-allowed;
}
.chat__btn--icon {
  background: transparent;
  color: var(--md-on-surface-variant);
  width: 40px;
  height: 40px;
}
.chat__btn--icon:hover:not([disabled]) {
  background: var(--md-surface-container);
  color: var(--md-on-surface);
}
.chat__btn--icon[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Estado vazio */
.chat__empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--md-space-8);
  text-align: center;
  color: var(--md-on-surface-variant);
  gap: var(--md-space-2);
}
.chat__empty svg { color: var(--md-outline); margin-bottom: var(--md-space-2); }
.chat__empty strong {
  font: 600 1rem/1.3 var(--md-font-display);
  color: var(--md-on-surface);
}

/* Skeleton de carregamento inicial */
.chat__skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--md-space-3);
  padding: var(--md-space-4) var(--md-space-5);
}
.chat__skeleton-bolha {
  height: 48px;
  background: linear-gradient(90deg,
    var(--md-surface-container) 0%,
    var(--md-surface-container-high) 50%,
    var(--md-surface-container) 100%);
  background-size: 200% 100%;
  border-radius: var(--md-radius-lg);
  animation: chat-shimmer 1.4s ease-in-out infinite;
}
.chat__skeleton-bolha:nth-child(1) { width: 60%; }
.chat__skeleton-bolha:nth-child(2) { width: 75%; align-self: flex-end; }
.chat__skeleton-bolha:nth-child(3) { width: 50%; }
@keyframes chat-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Responsivo: telas muito pequenas */
@media (max-width: 600px) {
  .chat { min-height: 420px; max-height: 540px; }
  .chat__header { padding: var(--md-space-3); }
  .chat__lista { padding: var(--md-space-3); }
  .chat__msg { max-width: 88%; }
  .chat__anexo-info strong { max-width: 160px; }
  .chat__footer { padding: var(--md-space-2) var(--md-space-3); }
}