Caja de Búsqueda Animada

.search-box-container {
  background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
  padding: 40px 20px;
  border-radius: 20px;
  max-width: 600px;
  margin: 0 auto;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
}

.search-box-demo {
  background: white;
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.03);
}

.search-header {
  text-align: center;
  margin-bottom: 30px;
}

.search-header h2 {
  margin: 0 0 10px 0;
  color: #333;
  font-size: 2rem;
  font-weight: 700;
}

.search-header p {
  color: #666;
  font-size: 1.1rem;
  margin: 0;
}

.search-wrapper {
  position: relative;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  padding: 5px;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.search-box:focus-within {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  background: white;
}

.search-box.focused {
  border-radius: 12px 12px 0 0;
}

.search-icon {
  font-size: 1.3rem;
  color: #999;
  padding: 0 15px;
  transition: color 0.3s ease;
}

.search-box:focus-within .search-icon {
  color: #667eea;
}

.search-input {
  flex: 1;
  padding: 15px 0;
  border: none;
  background: transparent;
  font-size: 1.1rem;
  color: #333;
  outline: none;
}

.search-input::placeholder {
  color: #999;
}

.search-input:focus::placeholder {
  color: #cbd5e1;
}

.clear-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: #f1f5f9;
  color: #999;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  margin: 0 5px;
  opacity: 0;
  visibility: hidden;
  transform: scale(0.8);
}

.search-input:not(:placeholder-shown) + .clear-btn,
.search-input:focus + .clear-btn {
  opacity: 1;
  visibility: visible;
  transform: scale(1);
}

.clear-btn:hover {
  background: #e2e8f0;
  color: #666;
  transform: scale(1.1);
}

.search-btn {
  padding: 15px 25px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-left: 5px;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.search-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.suggestions-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border: 2px solid #e2e8f0;
  border-top: none;
  border-radius: 0 0 12px 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 100;
  max-height: 300px;
  overflow-y: auto;
}

.search-box.focused + .suggestions-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.suggestion-group {
  padding: 15px 0;
  border-bottom: 1px solid #f1f5f9;
}

.suggestion-group:last-child {
  border-bottom: none;
}

.group-title {
  padding: 0 20px 10px;
  color: #667eea;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.suggestion-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 12px 20px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.suggestion-item:hover {
  background: #f8fafc;
}

.suggestion-item.active {
  background: #667eea;
  color: white;
}

.suggestion-icon {
  font-size: 1.2rem;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.suggestion-text {
  font-size: 1rem;
  font-weight: 500;
}

.suggestion-item.active .suggestion-text {
  color: white;
}

.recent-search {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  border-bottom: 1px solid #f1f5f9;
}

.recent-search:last-child {
  border-bottom: none;
}

.remove-search {
  background: none;
  border: none;
  color: #999;
  cursor: pointer;
  font-size: 1.2rem;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.remove-search:hover {
  background: #fee2e2;
  color: #ef4444;
}

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

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

.search-header {
  animation: fadeInUp 0.6s ease-out;
}

.search-box {
  animation: slideInDown 0.6s ease-out 0.2s both;
}

.suggestion-item {
  animation: fadeInUp 0.3s ease-out;
}

.suggestion-item:nth-child(1) { animation-delay: 0.1s; }
.suggestion-item:nth-child(2) { animation-delay: 0.2s; }
.suggestion-item:nth-child(3) { animation-delay: 0.3s; }

/* Responsivo */
@media (max-width: 768px) {
  .search-box-container {
    padding: 30px 15px;
  }
  
  .search-box-demo {
    padding: 25px;
  }
  
  .search-header h2 {
    font-size: 1.7rem;
  }
  
  .search-input {
    font-size: 1rem;
    padding: 12px 0;
  }
  
  .search-btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }
  
  .search-icon {
    font-size: 1.1rem;
    padding: 0 12px;
  }
  
  .suggestions-dropdown {
    max-height: 250px;
  }
  
  .suggestion-text {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .search-box {
    flex-direction: column;
    gap: 10px;
    padding: 15px;
  }
  
  .search-input {
    width: 100%;
  }
  
  .search-controls {
    display: flex;
    width: 100%;
    gap: 10px;
  }
  
  .clear-btn {
    margin: 0;
  }
  
  .search-btn {
    flex: 1;
    margin: 0;
  }
  
  .suggestions-dropdown {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    height: 70vh;
    border-radius: 20px 20px 0 0;
    transform: translateY(100%);
  }
  
  .search-box.focused + .suggestions-dropdown {
    transform: translateY(0);
  }
}

document.addEventListener('DOMContentLoaded', function() {
  // Obtener elementos del DOM
  const searchWrapper = document.getElementById('searchWrapper');
  const searchBox = document.getElementById('searchBox');
  const searchInput = document.getElementById('searchInput');
  const clearBtn = document.getElementById('clearBtn');
  const searchBtn = document.getElementById('searchBtn');
  const suggestionsDropdown = document.getElementById('suggestionsDropdown');
  const suggestionItems = document.querySelectorAll('.suggestion-item');
  const searchHeader = document.querySelector('.search-header');
  
  let activeIndex = -1;
  let recentSearches = [];
  
  // Inicializar caja de búsqueda
  function initSearchBox() {
    loadRecentSearches();
    setupEventListeners();
  }
  
  // Configurar escuchadores de eventos
  function setupEventListeners() {
    // Eventos de enfoque
    searchInput.addEventListener('focus', function() {
      searchBox.classList.add('focused');
      loadRecentSearches();
    });
    
    searchInput.addEventListener('blur', function() {
      // Retrasar ocultar para permitir hacer clic en sugerencias
      setTimeout(() => {
        searchBox.classList.remove('focused');
        activeIndex = -1;
        clearActiveSuggestion();
      }, 200);
    });
    
    // Eventos de entrada
    searchInput.addEventListener('input', function() {
      const value = this.value.trim();
      if (value) {
        // Mostrar sugerencias basadas en entrada
        filterSuggestions(value);
      } else {
        // Mostrar sugerencias predeterminadas
        showDefaultSuggestions();
      }
    });
    
    // Eventos de teclado
    searchInput.addEventListener('keydown', function(e) {
      handleKeyDown(e);
    });
    
    // Botón de limpiar
    clearBtn.addEventListener('click', function() {
      searchInput.value = '';
      searchInput.focus();
      showDefaultSuggestions();
    });
    
    // Botón de búsqueda
    searchBtn.addEventListener('click', function() {
      performSearch(searchInput.value.trim());
    });
    
    // Elementos de sugerencia
    suggestionItems.forEach((item, index) => {
      item.addEventListener('click', function() {
        const value = this.getAttribute('data-value');
        searchInput.value = value;
        performSearch(value);
      });
      
      item.addEventListener('mouseenter', function() {
        setActiveSuggestion(index);
      });
    });
    
    // Hacer clic fuera para cerrar
    document.addEventListener('click', function(e) {
      if (!searchWrapper.contains(e.target)) {
        searchBox.classList.remove('focused');
        activeIndex = -1;
        clearActiveSuggestion();
      }
    });
  }
  
  // Manejar eventos de teclado
  function handleKeyDown(e) {
    const items = Array.from(suggestionItems);
    
    switch(e.key) {
      case 'ArrowDown':
        e.preventDefault();
        activeIndex = (activeIndex + 1) % items.length;
        setActiveSuggestion(activeIndex);
        break;
        
      case 'ArrowUp':
        e.preventDefault();
        activeIndex = (activeIndex - 1 + items.length) % items.length;
        setActiveSuggestion(activeIndex);
        break;
        
      case 'Enter':
        e.preventDefault();
        if (activeIndex >= 0 && activeIndex < items.length) {
          const value = items[activeIndex].getAttribute('data-value');
          searchInput.value = value;
          performSearch(value);
        } else {
          performSearch(searchInput.value.trim());
        }
        break;
        
      case 'Escape':
        searchBox.classList.remove('focused');
        activeIndex = -1;
        clearActiveSuggestion();
        break;
    }
  }
  
  // Establecer sugerencia activa
  function setActiveSuggestion(index) {
    clearActiveSuggestion();
    if (index >= 0 && index < suggestionItems.length) {
      suggestionItems[index].classList.add('active');
      activeIndex = index;
    }
  }
  
  // Limpiar sugerencia activa
  function clearActiveSuggestion() {
    suggestionItems.forEach(item => {
      item.classList.remove('active');
    });
  }
  
  // Filtrar sugerencias basadas en entrada
  function filterSuggestions(query) {
    // En una implementación real, esto haría una llamada a la API
    // Para fines de demostración, filtraremos las sugerencias existentes
    const lowerQuery = query.toLowerCase();
    
    suggestionItems.forEach(item => {
      const text = item.getAttribute('data-value').toLowerCase();
      if (text.includes(lowerQuery)) {
        item.style.display = 'flex';
      } else {
        item.style.display = 'none';
      }
    });
  }
  
  // Mostrar sugerencias predeterminadas
  function showDefaultSuggestions() {
    suggestionItems.forEach(item => {
      item.style.display = 'flex';
    });
  }
  
  // Realizar búsqueda
  function performSearch(query) {
    if (query) {
      // Agregar a búsquedas recientes
      addToRecentSearches(query);
      
      // Mostrar estado de carga
      searchBtn.classList.add('loading');
      searchBtn.disabled = true;
      
      // Simular proceso de búsqueda
      setTimeout(() => {
        // En una implementación real, esto redirigiría a resultados de búsqueda
        alert(`Buscando: "${query}"\nEn una aplicación real, esto mostraría resultados de búsqueda.`);
        
        // Restablecer estado del botón
        searchBtn.classList.remove('loading');
        searchBtn.disabled = false;
        
        // Cerrar menú desplegable
        searchBox.classList.remove('focused');
        activeIndex = -1;
        clearActiveSuggestion();
      }, 1500);
    }
  }
  
  // Cargar búsquedas recientes
  function loadRecentSearches() {
    // En una implementación real, esto cargaría desde localStorage o API
    recentSearches = [
      'altavoz bluetooth',
      'reloj inteligente',
      'audífonos inalámbricos'
    ];
    
    // Actualizar búsquedas recientes en DOM
    updateRecentSearches();
  }
  
  // Actualizar visualización de búsquedas recientes
  function updateRecentSearches() {
    const recentGroup = document.querySelector('.suggestion-group:last-child');
    const groupTitle = recentGroup.querySelector('.group-title');
    
    if (recentSearches.length > 0) {
      groupTitle.textContent = 'Búsquedas Recientes';
      // Actualizar elementos de búsqueda reciente
      // (La implementación dependería de tus requisitos específicos)
    } else {
      groupTitle.textContent = 'No hay Búsquedas Recientes';
    }
  }
  
  // Agregar a búsquedas recientes
  function addToRecentSearches(query) {
    // Eliminar si ya existe
    const index = recentSearches.indexOf(query);
    if (index > -1) {
      recentSearches.splice(index, 1);
    }
    
    // Agregar al principio
    recentSearches.unshift(query);
    
    // Mantener solo las últimas 5
    if (recentSearches.length > 5) {
      recentSearches = recentSearches.slice(0, 5);
    }
    
    // Guardar en localStorage
    try {
      localStorage.setItem('recentSearches', JSON.stringify(recentSearches));
    } catch (e) {
      console.warn('No se pudieron guardar las búsquedas recientes en localStorage');
    }
  }
  
  // Inicializar la caja de búsqueda
  initSearchBox();
});