/* Importar fuentes de Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&family=Inter:wght@400;500;600&display=swap');

/* Variables CSS para colores y temas */
:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary-color: #ec4899;
  --accent-color: #14b8a6;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  --transition-fast: 0.15s ease-in-out;
  --transition-base: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
}

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

body {
  font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 0;
  transition: all var(--transition-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.3), transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(59, 130, 246, 0.2), transparent 50%);
  z-index: -1;
  animation: gradient-shift 15s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

body.claro {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body.oscuro {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --bg-primary: #1e293b;
  --bg-secondary: #334155;
  --bg-tertiary: #475569;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #475569;
}

body.oscuro::before {
  background: 
    radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.2), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.2), transparent 50%);
}

/* Navegación */
#nav {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  border-radius: var(--radius-xl);
  margin: 1.5rem auto;
  max-width: 1200px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-xl);
  animation: slideDown 0.5s ease-out;
  flex-wrap: wrap;
}

body.oscuro #nav {
  background: rgba(30, 41, 59, 0.95);
}

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

#nav > a {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo {
  width: 70px;
  height: 70px;
  border-radius: var(--radius-full);
  border: 3px solid var(--primary-color);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base);
  object-fit: cover;
}

.logo:hover {
  transform: scale(1.1) rotate(5deg);
}

h1 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  letter-spacing: -0.5px;
  flex: 1;
  min-width: 200px;
}

/* Botones de navegación */
#nav button {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  border: none;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  white-space: nowrap;
}

#nav button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

#nav button:active {
  transform: translateY(0);
}

#tema-toggle {
  background: linear-gradient(135deg, #f59e0b, #f97316) !important;
  font-size: 1.2rem;
  padding: 0.65rem 1rem !important;
}

#sesion-toggle {
  background: linear-gradient(135deg, var(--secondary-color), #be185d) !important;
}

#notificaciones-toggle {
  background: linear-gradient(135deg, var(--accent-color), #0d9488) !important;
}

/* Tabs de categorías */
.tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tabs button {
  padding: 1rem 1.5rem;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text-primary);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

body.oscuro .tabs button {
  background: rgba(30, 41, 59, 0.95);
  color: var(--text-primary);
}

.tabs button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left var(--transition-slow);
}

.tabs button:hover::before {
  left: 100%;
}

.tabs button:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
}

.tabs button:active {
  transform: translateY(-2px);
}

/* Contenido principal */
#content {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  max-width: 800px;
  margin: 2rem auto;
  box-shadow: var(--shadow-xl);
  animation: fadeInScale 0.5s ease-out 0.3s both;
}

body.oscuro #content {
  background: rgba(30, 41, 59, 0.98);
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

#content h2 {
  font-family: 'Poppins', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
}

#content label {
  display: block;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

textarea {
  width: 100%;
  min-height: 120px;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  resize: vertical;
  transition: all var(--transition-base);
  background: var(--bg-secondary);
  color: var(--text-primary);
}

textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  background: var(--bg-primary);
}

button#submit {
  width: 100%;
  padding: 1rem 2rem;
  margin-top: 1.5rem;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
  text-transform: uppercase;
  letter-spacing: 1px;
}

button#submit:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}

button#submit:active {
  transform: translateY(-1px);
}

/* Sistema de calificación */
#calificacion {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin: 1rem 0;
}

.calificacion {
  font-size: 2.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  filter: grayscale(100%);
  opacity: 0.4;
}

.calificacion:hover {
  transform: scale(1.2);
  filter: grayscale(0%);
  opacity: 1;
}

.calificacion.selected {
  filter: grayscale(0%);
  opacity: 1;
  color: #fbbf24;
  text-shadow: 0 0 10px rgba(251, 191, 36, 0.5);
  animation: starPulse 0.3s ease-out;
}

@keyframes starPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.3); }
}

.puntuacion {
  color: #fbbf24;
  font-size: 1.2rem;
  text-shadow: 0 0 5px rgba(251, 191, 36, 0.3);
}

/* Imagen de categoría */
.imagen-categoria {
  width: 100%;
  height: auto;
  max-width: 600px;
  max-height: 350px;
  border-radius: var(--radius-lg);
  margin: 1.5rem auto;
  display: block;
  object-fit: cover;
  box-shadow: var(--shadow-xl);
  border: 3px solid rgba(255, 255, 255, 0.2);
  transition: transform var(--transition-base);
}

.imagen-categoria:hover {
  transform: scale(1.02);
}

/* Comentarios */
h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2.5rem 0 1.5rem;
  color: var(--text-primary);
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 0.5rem;
}

.comentario {
  background: var(--bg-secondary);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  border-left: 4px solid var(--primary-color);
  transition: all var(--transition-base);
  animation: slideInLeft 0.4s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.comentario:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--secondary-color);
}

.comentario p {
  margin: 0.5rem 0;
  line-height: 1.6;
}

.comentario strong {
  color: var(--primary-color);
  font-weight: 600;
}

/* Responsive */
@media (max-width: 768px) {
  body {
    padding: 0;
  }
  
  #nav {
    padding: 1rem;
    margin: 1rem;
    justify-content: center;
  }
  
  h1 {
    font-size: 1.25rem;
  }
  
  .logo {
    width: 50px;
    height: 50px;
  }
  
  .tabs {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    padding: 0 1rem;
  }
  
  .tabs button {
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
  }
  
  #content {
    padding: 1.5rem;
    margin: 1rem;
  }
  
  #content h2 {
    font-size: 1.5rem;
  }
  
  #nav button {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .tabs {
    grid-template-columns: 1fr;
  }
  
  h1 {
    font-size: 1.1rem;
    min-width: 150px;
  }
  
  #nav {
    gap: 0.5rem;
  }
}