/* ===================================
   ESTILOS PRINCIPALES - Chatbot IA
   =================================== */

/* Reset y Variables */
:root {
  /* Colores principales */
  --primary-color: #4F46E5;
  --primary-hover: #4338CA;
  --primary-light: #EEF2FF;
  
  /* Colores secundarios */
  --secondary-color: #10B981;
  --danger-color: #EF4444;
  --warning-color: #F59E0B;
  
  /* Colores de fondo */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F9FAFB;
  --bg-tertiary: #F3F4F6;
  
  /* Colores de texto */
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  
  /* Bordes y sombras */
  --border-color: #E5E7EB;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Espaciado */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Bordes redondeados */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Transiciones */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Utilidades */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===================================
   PÁGINA DE LOGIN
   =================================== */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: var(--spacing-lg);
}

.login-page .container {
  width: 100%;
  max-width: 1000px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.login-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-xl);
  width: 100%;
  max-width: 420px;
  animation: fadeInUp 0.5s ease-out;
}

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

.logo-section {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.logo-circle {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  box-shadow: var(--shadow-lg);
}

.logo-circle svg {
  width: 40px;
  height: 40px;
  color: white;
}

.login-card h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
}

.login-section {
  margin-bottom: var(--spacing-lg);
}

/* Botón de Google */
.google-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.google-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.google-btn:active {
  transform: translateY(0);
}

.google-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.google-icon {
  width: 24px;
  height: 24px;
}

/* Mensajes de error y loading */
.error-message {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  background: #FEE2E2;
  border: 1px solid #FCA5A5;
  border-radius: var(--radius-md);
  color: var(--danger-color);
  font-size: 0.875rem;
  animation: shake 0.3s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.loading-message {
  margin-top: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--primary-light);
  border-radius: var(--radius-md);
  color: var(--primary-color);
  font-size: 0.875rem;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid var(--primary-light);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.footer-text {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

.footer-text p {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ===================================
   SCROLLBAR PERSONALIZADO
   =================================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* ===================================
   RESPONSIVE
   =================================== */

@media (max-width: 640px) {
  .login-card {
    padding: var(--spacing-lg);
  }
  
  .login-card h1 {
    font-size: 1.5rem;
  }
}