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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1a472a 0%, #000000 100%);
  min-height: 100vh;
  padding: 1rem;
}

#auth-container,
#chat-container {
  width: 100%;
  max-width: 800px;
  margin: 20px auto;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  padding: 1.5rem;
}

.auth-toggle {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.auth-toggle button {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: #1a472a;
  color: white;
  cursor: pointer;
  font-size: 1rem;
}

.auth-toggle button.active {
  background: #2a673a;
}

h2 {
  text-align: center;
  color: #2d3748;
  margin-bottom: 1.5rem;
  font-size: 1.8rem;
  font-weight: 600;
}

.auth-form input,
#chat-form input {
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1rem;
}

.auth-form input:focus,
#chat-form input:focus {
  outline: none;
  border-color: #1a472a;
}

.auth-form button,
#chat-form button {
  width: 100%;
  padding: 12px;
  background: #1a472a;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

#chat-messages {
  margin: 20px 0;
  height: calc(100vh - 250px);
  overflow-y: auto;
  background: #f8fafc;
  padding: 1rem;
  border-radius: 12px;
  border: 2px solid #e2e8f0;
}

.chat-message {
  margin-bottom: 12px;
  padding: 10px 15px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.chat-message strong {
  color: #1a472a;
  margin-right: 8px;
}

.chat-message span {
  color: #2d3748;
  font-size: 0.95rem;
  line-height: 1.5;
}

#username {
  color: #1a472a;
  font-weight: 600;
}

#chat-messages::-webkit-scrollbar {
  width: 8px;
}

#chat-messages::-webkit-scrollbar-track {
  background: #f8fafc;
  border-radius: 4px;
}

#chat-messages::-webkit-scrollbar-thumb {
  background: #1a472a;
  border-radius: 4px;
}

@media (max-width: 768px) {
  body {
    padding: 0.5rem;
  }
  
  #auth-container,
  #chat-container {
    margin: 10px auto;
    padding: 1rem;
  }
  
  .chat-message {
    padding: 8px 12px;
  }
}