/* Fuente de Vulpium */
@import url('https://fonts.googleapis.com/css2?family=Quicksand:wght@400;600;700&display=swap');

:root {
  --rosa: #ffd6e8;
  --rosa-claro: #ffe3f7;
  --azul-pastel: #baeaff;
  --azul-claro: #c2f0fc;
  --fondo: #fdf6f9;
  --texto: #3a3a3a;
  --texto-claro: #666;
  --blanco: #ffffff;
  --sombra: rgba(0,0,0,0.1);
  --sombra-rosa: rgba(255, 214, 232, 0.4);
}

/* Fondo animado de estrellas */
.stars {
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: 0;
  background: transparent;
}

.stars::before, .stars::after {
  content: "";
  position: absolute;
  width: 100%; height: 100%;
  top: 0; left: 0;
  background-image:
    radial-gradient(white 1px, transparent 1px),
    radial-gradient(var(--rosa-claro) 1.5px, transparent 1.5px),
    radial-gradient(var(--azul-pastel) 1px, transparent 1px);
  background-size: 80px 80px, 120px 120px, 200px 200px;
  background-position: 0 0, 40px 60px, 100px 120px;
  opacity: 0.7;
  animation: stars-move 60s linear infinite;
}

.stars::after {
  background-size: 160px 160px, 240px 240px, 400px 400px;
  background-position: 80px 40px, 60px 100px, 200px 80px;
  opacity: 0.4;
  animation-duration: 90s;
}

@keyframes stars-move {
  0% { transform: translateY(0); }
  100% { transform: translateY(40px); }
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Quicksand', sans-serif;
  background: var(--fondo);
  color: var(--texto);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* Barra de autenticación */
.auth-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rosa-claro);
  z-index: 1000;
  padding: 0.75rem 1rem;
  box-shadow: 0 2px 10px var(--sombra);
}

.auth-controls {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.home-btn {
  background: linear-gradient(135deg, var(--azul-pastel), var(--rosa));
  color: var(--texto);
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 600;
  transition: all 0.3s ease;
  font-family: 'Quicksand', sans-serif;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.home-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--sombra-rosa);
  background: linear-gradient(135deg, var(--rosa), var(--azul-pastel));
}

.login-btn {
  background: linear-gradient(135deg, var(--rosa), var(--azul-pastel));
  color: var(--texto);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'Quicksand', sans-serif;
  font-size: 0.9rem;
}

.login-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--sombra-rosa);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-photo {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--rosa);
}

.user-name {
  font-weight: 600;
  color: var(--texto);
}

.logout-btn {
  background: var(--azul-pastel);
  color: var(--texto);
  border: none;
  padding: 0.4rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'Quicksand', sans-serif;
}

.logout-btn:hover {
  background: var(--rosa);
  transform: translateY(-1px);
}

/* Mensaje de login requerido */
.login-required {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  position: relative;
  z-index: 2;
}

.login-message {
  text-align: center;
  background: var(--blanco);
  padding: 2.5rem;
  border-radius: 25px;
  border: 2px solid var(--rosa-claro);
  box-shadow: 0 8px 32px var(--sombra);
  max-width: 400px;
  width: 100%;
}

.login-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 3px solid var(--rosa);
  margin-bottom: 1rem;
  box-shadow: 0 4px 16px var(--sombra-rosa);
}

.login-message h2 {
  color: var(--texto);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.login-message p {
  color: var(--texto-claro);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.login-btn-large {
  background: linear-gradient(135deg, var(--rosa), var(--azul-pastel));
  color: var(--texto);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'Quicksand', sans-serif;
  font-size: 1rem;
  box-shadow: 0 4px 12px var(--sombra-rosa);
}

.login-btn-large:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px var(--sombra-rosa);
}

/* Agregar estrellas al body */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(white 1px, transparent 1px),
    radial-gradient(var(--rosa-claro) 1.5px, transparent 1.5px),
    radial-gradient(var(--azul-pastel) 1px, transparent 1px);
  background-size: 80px 80px, 120px 120px, 200px 200px;
  background-position: 0 0, 40px 60px, 100px 120px;
  opacity: 0.3;
  animation: stars-move 60s linear infinite;
}

h1 {
  text-align: center;
  margin: 0;
  margin-top: 80px; /* Espacio para la barra de autenticación */
  padding: 1.5rem;
  font-size: 2.5rem;
  background-clip: text;
  position: relative;
  z-index: 2;
  font-weight: 700;
  text-shadow: 0 2px 4px var(--sombra-rosa);
}

#chat {
  flex: 1;
  padding: 1rem;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  overflow-y: auto;
  position: relative;
  z-index: 2;
  padding-bottom: 100px; /* Espacio para el input */
}

.message {
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  opacity: 0;
  animation: fadeInUp 0.5s ease forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message.user {
  flex-direction: row-reverse;
}

.message.assistant {
  flex-direction: row;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 2px solid var(--rosa);
  box-shadow: 0 2px 8px var(--sombra-rosa);
  background: linear-gradient(135deg, var(--rosa-claro), var(--azul-pastel));
  padding: 2px;
}

.user-avatar {
  background: linear-gradient(135deg, var(--azul-pastel), var(--azul-claro));
  border-color: var(--azul-pastel);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--texto);
  object-fit: cover;
}

.message-content {
  background: var(--blanco);
  padding: 1rem 1.25rem;
  border-radius: 18px;
  max-width: 70%;
  box-shadow: 0 4px 12px var(--sombra);
  position: relative;
  word-wrap: break-word;
  line-height: 1.5;
}

.message.user .message-content {
  background: linear-gradient(135deg, var(--rosa), var(--rosa-claro));
  color: var(--texto);
  border-bottom-right-radius: 6px;
}

.message.assistant .message-content {
  background: var(--blanco);
  border: 1px solid var(--rosa-claro);
  border-bottom-left-radius: 6px;
  box-shadow: 0 4px 12px var(--sombra), 0 0 0 1px var(--rosa-claro);
}

/* Flecha del globo de chat */
.message.user .message-content::after {
  content: "";
  position: absolute;
  right: -8px;
  bottom: 8px;
  width: 0;
  height: 0;
  border-left: 8px solid var(--rosa);
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
}

.message.assistant .message-content::after {
  content: "";
  position: absolute;
  left: -8px;
  bottom: 8px;
  width: 0;
  height: 0;
  border-right: 8px solid var(--blanco);
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
}

.input-container {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--rosa-claro);
  box-shadow: 0 -4px 20px var(--sombra);
  z-index: 10;
}

.input-wrapper {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

#userInput {
  flex: 1;
  padding: 0.875rem 1.25rem;
  border: 2px solid var(--rosa-claro);
  border-radius: 25px;
  font-size: 1rem;
  font-family: 'Quicksand', sans-serif;
  outline: none;
  background: var(--blanco);
  color: var(--texto);
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px var(--sombra);
}

#userInput:focus {
  border-color: var(--rosa);
  box-shadow: 0 0 0 3px rgba(255, 214, 232, 0.3), 0 4px 12px var(--sombra);
  transform: translateY(-1px);
}

#userInput::placeholder {
  color: var(--texto-claro);
}

#sendBtn {
  padding: 0.875rem 1.5rem;
  background: linear-gradient(135deg, var(--rosa), var(--azul-pastel));
  color: var(--texto);
  border: none;
  border-radius: 25px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'Quicksand', sans-serif;
  box-shadow: 0 4px 12px var(--sombra-rosa);
  min-width: 80px;
}

#sendBtn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px var(--sombra-rosa);
  background: linear-gradient(135deg, var(--azul-pastel), var(--rosa));
}

#sendBtn:active {
  transform: translateY(0) scale(0.98);
}

#sendBtn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Loading animation */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  background: var(--blanco);
  border-radius: 18px;
  border-bottom-left-radius: 6px;
  border: 1px solid var(--rosa-claro);
  box-shadow: 0 4px 12px var(--sombra);
  margin-bottom: 1rem;
}

.typing-dots {
  display: flex;
  gap: 4px;
}

.typing-dots span {
  width: 8px;
  height: 8px;
  background: var(--rosa);
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
    opacity: 0.4;
  }
  30% {
    transform: translateY(-10px);
    opacity: 1;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .auth-bar {
    padding: 0.5rem;
  }
  
  .auth-controls {
    gap: 0.5rem;
  }
  
  .user-name {
    display: none; /* Ocultar nombre en móvil */
  }
  
  .home-btn {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
  
  .login-btn {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
  
  h1 {
    font-size: 2rem;
    padding: 1rem;
    margin-top: 70px;
  }
  
  .login-message {
    padding: 2rem;
    margin: 1rem;
  }
  
  .login-avatar {
    width: 60px;
    height: 60px;
  }
  
  .login-message h2 {
    font-size: 1.3rem;
  }
  
  #chat {
    padding: 0.75rem;
    padding-bottom: 120px;
  }
  
  .message-content {
    max-width: 85%;
    padding: 0.875rem 1rem;
    font-size: 0.95rem;
  }
  
  .avatar {
    width: 35px;
    height: 35px;
  }
  
  .input-container {
    padding: 0.75rem;
  }
  
  #userInput {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }
  
  #sendBtn {
    padding: 0.75rem 1.25rem;
    font-size: 0.95rem;
    min-width: 70px;
  }
  
  .input-wrapper {
    gap: 0.5rem;
  }
}

@media (max-width: 480px) {
  .user-photo {
    width: 28px;
    height: 28px;
  }
  
  .home-btn {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
  }
  
  .logout-btn {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
  }
  
  h1 {
    font-size: 1.75rem;
    padding: 0.75rem;
    margin-top: 65px;
  }
  
  .login-message {
    padding: 1.5rem;
    margin: 0.5rem;
  }
  
  .login-avatar {
    width: 50px;
    height: 50px;
  }
  
  .login-message h2 {
    font-size: 1.2rem;
  }
  
  .login-btn-large {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }
  
  #chat {
    padding: 0.5rem;
    padding-bottom: 140px;
  }
  
  .message-content {
    max-width: 90%;
    padding: 0.75rem 0.875rem;
    font-size: 0.9rem;
  }
  
  .avatar {
    width: 32px;
    height: 32px;
  }
  
  #userInput {
    padding: 0.625rem 0.875rem;
    font-size: 0.9rem;
  }
  
  #sendBtn {
    padding: 0.625rem 1rem;
    font-size: 0.9rem;
    min-width: 60px;
  }
}

/* Scroll suave */
html {
  scroll-behavior: smooth;
}

/* Personalizar scrollbar */
#chat::-webkit-scrollbar {
  width: 6px;
}

#chat::-webkit-scrollbar-track {
  background: transparent;
}

#chat::-webkit-scrollbar-thumb {
  background: var(--rosa);
  border-radius: 3px;
}

#chat::-webkit-scrollbar-thumb:hover {
  background: var(--azul-pastel);
}

/* Efectos adicionales */
.sparkle {
  animation: sparkle 2s infinite alternate;
  filter: drop-shadow(0 0 6px rgba(255, 214, 232, 0.5));
}

@keyframes sparkle {
  0% { 
    opacity: 0.8; 
    transform: scale(1) rotate(0deg); 
  }
  100% { 
    opacity: 1; 
    transform: scale(1.1) rotate(5deg); 
  }
}

/* Estado de carga para botón */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: loading-shine 1.5s infinite;
}

@keyframes loading-shine {
  0% { left: -100%; }
  100% { left: 100%; }
}