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

/* Fundo com gradiente */
body {
  font-family: "Inter", Arial, sans-serif;
  background: linear-gradient(135deg, #6fa3ef, #a8d8ff);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Container principal */
.chat-container {
  width: 75%;
  height: 100%;

  background: #fff;
  border-radius: 16px;
  box-shadow: 0 10px 35px rgba(0,0,0,0.15);

  display: flex;
  flex-direction: column;
  overflow: hidden;

  animation: fadeIn .4s ease-out;
}

/* Animação de fade */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Header */
.chat-header {
  background: #1976d2;
  padding: 18px;
  text-align: center;
  color: white;
}

.chat-header h1 {
  font-size: 20px;
}

/* Corpo do chat */
.chat-body {
  flex: 1;
  padding: 15px;
  overflow-y: auto;
  background: #f5f9ff;

}

/* Lista */
#messages {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Bolhas de mensagem */
.message {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 14px;
  position: relative;
  animation: slideUp .2s ease-out;
}

/* Animação */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Mensagem enviada pelo usuário */
.me {
  background: #1976d2;
  color: white;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

/* Mensagem recebida */
.other {
  background: white;
  border: 1px solid #d6e4ff;
  color: #222;
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

/* Sistema */
.system {
  text-align: center;
  font-size: 13px;
  opacity: 0.7;
  margin: 10px 0;
}

/* Formulário */
.chat-form {
  display: flex;
  gap: 8px;
  padding: 12px;
  background: #fff;
  border-top: 1px solid #eee;
}

.chat-form input {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 14px;
}

#username {
  width: 150px;
}

.chat-form button {
  padding: 10px 16px;
  background: #1976d2;
  border: none;
  color: white;
  border-radius: 10px;
  cursor: pointer;
  font-weight: bold;
  transition: 0.15s;
}

.chat-form button:hover {
  background: #0e5bbd;
}

/* Responsividade */
@media (max-width: 480px) {
  .chat-container {
    width: auto;
    height: auto;
    border-radius: 0;
  }
}