/* ========================================================================= */
/* 1. VARIABLES & GLOBALE / RESET (Aggiornato) */
/* ========================================================================= */

:root {
  /* Primary - Blu più profondo e autorevole */
  --primary-700: #1e3a8a;
  --primary-600: #1e40af;
  --primary-500: #3b82f6;
  --primary-100: #dbeafe;
  --primary-50: #eff6ff;
  
  /* Neutral - Grigi più sofisticati */
  --gray-900: #0f172a;
  --gray-800: #1e293b;
  --gray-700: #334155;
  --gray-600: #475569;
  --gray-500: #64748b;
  --gray-400: #94a3b8;
  --gray-300: #cbd5e1;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;
  
  /* Accent - Colore di contrasto elegante */
  --accent-600: #7c3aed;
  --accent-500: #8b5cf6;
  --accent-100: #ede9fe;
  
  /* Success - Verde più sobrio */
  --success-600: #059669;
  --success-500: #10b981;
  --success-100: #d1fae5;
  
  /* Warning */
  --warning-500: #f59e0b;
  
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
  
  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  background-color: var(--gray-50);
  color: var(--gray-700);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  font-weight: 450;
  letter-spacing: -0.01em;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Pill più elegante */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--primary-50);
  color: var(--primary-600);
  border: 1px solid rgba(30, 64, 175, 0.15);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: var(--transition-fast);
}

.pill:hover {
  border-color: var(--primary-500);
  background: var(--primary-100);
}

.pill.premium {
  background: linear-gradient(135deg, var(--accent-500), var(--primary-500));
  color: var(--white);
  border: none;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.2);
}

/* ========================================================================= */
/* 2. NAVBAR (Professional Design) */
/* ========================================================================= */

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  z-index: 1000;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.logo {
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--gray-900);
  letter-spacing: -0.02em;
  z-index: 1001;
  display: flex;
  align-items: center;
  gap: 4px;
}

.logo span {
  color: var(--primary-600);
  position: relative;
}

.logo::after {
  content: "›";
  color: var(--accent-600);
  font-weight: 900;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--gray-600);
  font-weight: 600;
  font-size: 0.95rem;
  position: relative;
  transition: color var(--transition-fast);
  padding: 8px 0;
}

.nav-links a:hover {
  color: var(--primary-600);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-600);
  transition: width var(--transition-base);
  border-radius: var(--radius-full);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--gray-200);
  cursor: pointer;
  padding: 10px;
  border-radius: var(--radius-md);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 48px;
  height: 48px;
  z-index: 1001;
  transition: all var(--transition-fast);
}

.nav-toggle:hover {
  background: var(--gray-100);
  border-color: var(--gray-300);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--gray-800);
  margin: 3px 0;
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

/* Overlay aggiornato */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: 998;
  display: none;
}

.nav-overlay.show {
  opacity: 1;
  pointer-events: auto;
  display: block;
}

body.no-scroll {
  overflow: hidden;
}

/* ========================================================================= */
/* 3. MOBILE NAV DRAWER (Max-width 768px) */
/* ========================================================================= */

@media (max-width: 768px) {
  .main-nav {
    padding: 14px 0;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(85vw, 320px);
    background: var(--white);
    border-left: 1px solid var(--gray-200);
    box-shadow: var(--shadow-xl);
    padding: 80px 24px 40px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transform: translateX(100%);
    z-index: 999;
    overflow-y: auto;
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--transition-base), visibility 0s 0.3s;
  }
  
  .nav-links a {
    font-size: 1.1rem;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    margin-bottom: 4px;
    border: 1px solid transparent;
  }
  
  .nav-links a:hover {
    background: var(--gray-100);
    color: var(--primary-600);
    border-color: var(--gray-200);
  }
  
  .nav-links a::after {
    display: none;
  }
  
  .nav-links.open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform var(--transition-base), visibility 0s 0s;
  }
  
  .nav-toggle.open {
    border-color: var(--primary-600);
    background: var(--primary-50);
  }
  
  .nav-toggle.open span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
    background: var(--primary-600);
  }
  
  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
    background: var(--primary-600);
  }
}

/* ========================================================================= */
/* 4. HERO SECTION (Professional) */
/* ========================================================================= */

header {
  text-align: center;
  padding: 48px 0 32px;
  width: 100%;
}

h1 {
  color: var(--gray-900);
  margin-bottom: 16px;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.subtitle {
  color: var(--gray-600);
  font-size: clamp(1rem, 3vw, 1.25rem);
  max-width: 820px;
  margin: 0 auto;
  padding: 0 20px;
  font-weight: 450;
  line-height: 1.7;
}

.hero-badges {
  margin-top: 24px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ========================================================================= */
/* 5. SEARCH & STATS (Professional) */
/* ========================================================================= */

.search-container {
  max-width: 760px;
  margin: 32px auto 12px;
  position: relative;
  padding: 0 20px;
  width: 100%;
}

.search-box {
  display: flex;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.search-box:focus-within {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1), var(--shadow-lg);
}

.search-input {
  flex: 1;
  padding: 18px 24px;
  border: none;
  font-size: 1rem;
  outline: none;
  background: transparent;
  color: var(--gray-800);
  font-weight: 500;
}

.search-input::placeholder {
  color: var(--gray-400);
  font-weight: 450;
}

.search-button {
  background-color: var(--primary-600);
  color: var(--white);
  border: none;
  padding: 0 32px;
  cursor: pointer;
  font-weight: 700;
  transition: all var(--transition-base);
  white-space: nowrap;
  font-size: 1rem;
  letter-spacing: 0.01em;
  position: relative;
  overflow: hidden;
}

.search-button:hover {
  background-color: var(--gray-900);
  transform: translateY(-1px);
}

.search-button:active {
  transform: translateY(0);
}

.helper-text {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-top: 12px;
  padding: 0 20px;
  font-weight: 500;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 40px auto 20px;
  max-width: 980px;
  padding: 0 20px;
  width: 100%;
}

.stat-card {
  background: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
  border: 1px solid transparent;
}

.stat-card:hover {
  border-color: var(--gray-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.stat-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat-label {
  color: var(--gray-600);
  font-size: 0.95rem;
  font-weight: 600;
}

/* ========================================================================= */
/* 6. CATEGORIES (Professional) */
/* ========================================================================= */

.categories {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin: 48px 0 56px;
  flex-wrap: wrap;
  padding: 0 20px;
}

.category-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  padding: 24px 20px;
  text-align: center;
  width: 180px;
  transition: all var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-500);
}

.category-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--primary-600);
  opacity: 0.9;
}

.category-name {
  font-weight: 700;
  color: var(--gray-900);
  font-size: 1rem;
  letter-spacing: 0.01em;
}

/* ========================================================================= */
/* 7. AMAZON BANNER (Professional) */
/* ========================================================================= */

.amazon-banner {
  position: relative;
  display: block;
  width: 100%;
  margin: 24px 0;
  padding: 24px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, var(--gray-900), var(--primary-600));
  background-size: 200% 200%;
  animation: amazonGradient 8s ease infinite;
  text-decoration: none;
  color: var(--white);
  box-shadow: 0 8px 32px rgba(30, 64, 175, 0.2);
  transform: translateZ(0);
  transition: all var(--transition-base);
}

.amazon-banner:hover {
  background: linear-gradient(135deg, var(--gray-900), var(--primary-700));
  box-shadow: 0 12px 48px rgba(30, 64, 175, 0.3);
  transform: translateY(-2px);
}

.amazon-banner__glow {
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 55%);
  animation: glowMove 8s ease-in-out infinite;
  pointer-events: none;
  max-width: 100vw;
  left: 50%;
  transform: translateX(-50%);
}

.amazon-banner__content {
  position: relative;
  display: flex;
  align-items: center;
  gap: 20px;
}

.amazon-banner__badge {
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.08em;
  background: rgba(255, 255, 255, 0.15);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  white-space: nowrap;
  backdrop-filter: blur(4px);
}

.amazon-banner__text {
  flex: 1;
  min-width: 0;
}

.amazon-banner__title {
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  font-weight: 800;
  line-height: 1.2;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
  letter-spacing: -0.01em;
}

.amazon-banner__subtitle {
  font-size: clamp(0.9rem, 1.6vw, 1rem);
  opacity: 0.9;
  margin-top: 8px;
  font-weight: 500;
}

.amazon-banner__cta {
  font-weight: 800;
  background: rgba(255, 255, 255, 0.15);
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  white-space: nowrap;
  backdrop-filter: blur(8px);
  transition: all var(--transition-base);
  letter-spacing: 0.01em;
}

.amazon-banner:hover .amazon-banner__cta {
  transform: translateX(6px);
  background: rgba(255, 255, 255, 0.25);
}

@keyframes amazonGradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes glowMove {
  0%, 100% {
    transform: translateX(-10%) translateY(-10%) rotate(0deg);
  }
  50% {
    transform: translateX(10%) translateY(10%) rotate(6deg);
  }
}

/* ========================================================================= */
/* 8. SEARCH RESULTS (Professional) */
/* ========================================================================= */

.search-results {
  margin: 48px 0;
}

.results-header {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 16px;
  align-items: center;
  margin-bottom: 24px;
}

.results-count {
  color: var(--gray-600);
  font-weight: 600;
  font-size: 1.1rem;
}

.sort-options select {
  padding: 10px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background-color: var(--white);
  font-weight: 600;
  color: var(--gray-800);
  cursor: pointer;
  transition: var(--transition-fast);
}

.sort-options select:hover {
  border-color: var(--gray-400);
}

.sort-options select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.results-container {
  display: flex;
  gap: 32px;
}

.filters-column {
  flex: 0 0 280px;
}

.products-column {
  flex: 1;
}

.filters-sidebar {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  padding: 24px;
  position: sticky;
  top: 96px;
  transition: var(--transition-base);
}

.filters-sidebar:hover {
  box-shadow: var(--shadow-lg);
}

.filter-group {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--gray-100);
}

.filter-group:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.filter-title {
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--gray-900);
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.filter-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  color: var(--gray-700);
  cursor: pointer;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.filter-option:hover {
  color: var(--primary-600);
}

.price-range {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.price-input {
  flex: 1;
  padding: 10px 16px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--gray-800);
  transition: var(--transition-fast);
}

.price-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.apply-filters {
  display: block;
  width: 100%;
  padding: 14px;
  background-color: var(--primary-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: 1rem;
  letter-spacing: 0.01em;
}

.apply-filters:hover {
  background-color: var(--gray-900);
  transform: translateY(-1px);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-500);
}

.product-image {
  height: 200px;
  background-color: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 20px;
  border-bottom: 1px solid var(--gray-100);
}

.product-image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform var(--transition-base);
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-info {
  padding: 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.product-name {
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--gray-900);
  font-size: 1.1rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.product-description {
  color: var(--gray-600);
  font-size: 0.9rem;
  margin-bottom: 16px;
  line-height: 1.5;
  flex-grow: 1;
}

.product-price {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--success-600);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.product-rating {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
  gap: 8px;
}

.stars {
  color: var(--warning-500);
  font-weight: 800;
  letter-spacing: 1px;
}

.rating-count {
  color: var(--gray-500);
  font-size: 0.9rem;
  font-weight: 600;
}

.product-button {
  display: block;
  width: 100%;
  padding: 12px;
  background-color: var(--primary-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 800;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  margin-top: auto;
}

.product-button:hover {
  background-color: var(--gray-900);
  transform: translateY(-1px);
}

/* ========================================================================= */
/* 9. PRODUCT DETAIL (Professional) */
/* ========================================================================= */

.product-detail {
  display: none;
  margin: 48px 0;
}

.back-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background-color: var(--gray-600);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  margin-bottom: 24px;
  text-decoration: none;
  font-size: 0.95rem;
}

.back-button:hover {
  background-color: var(--gray-700);
  transform: translateX(-2px);
}

.product-detail-content {
  display: flex;
  gap: 40px;
  background: var(--white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
  padding: 40px;
  margin-top: 20px;
}

.product-detail-image {
  flex: 0 0 400px;
  background-color: var(--gray-50);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  height: 400px;
  border: 1px solid var(--gray-200);
}

.product-detail-image img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform var(--transition-slow);
}

.product-detail-image:hover img {
  transform: scale(1.05);
}

.product-detail-info {
  flex: 1;
}

.product-detail-name {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 12px;
  color: var(--gray-900);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.product-detail-rating {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
  gap: 12px;
}

.product-detail-price {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--success-600);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.product-detail-description {
  margin-bottom: 24px;
  line-height: 1.7;
  color: var(--gray-700);
  font-weight: 500;
  font-size: 1.05rem;
}

.product-specs {
  margin-top: 32px;
}

.specs-title {
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--gray-900);
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}

.specs-list {
  list-style: none;
}

.specs-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  gap: 20px;
  transition: var(--transition-fast);
}

.specs-list li:hover {
  background: var(--gray-50);
  padding-left: 12px;
  padding-right: 12px;
  margin: 0 -12px;
  border-radius: var(--radius-sm);
}

.spec-name {
  flex: 0 0 180px;
  font-weight: 700;
  color: var(--gray-800);
  font-size: 0.95rem;
}

.spec-value {
  flex: 1;
  color: var(--gray-700);
  font-weight: 500;
}

/* ========================================================================= */
/* 10. INFO SECTION (Professional) */
/* ========================================================================= */

section.info {
  margin: 80px 0;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 16px;
  text-align: center;
  letter-spacing: -0.02em;
}

.section-sub {
  text-align: center;
  color: var(--gray-600);
  font-size: 1.1rem;
  max-width: 820px;
  margin: 0 auto 40px;
  font-weight: 450;
  line-height: 1.7;
}

.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.info-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-500);
}

.info-card h3 {
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.info-card p {
  color: var(--gray-600);
  font-weight: 500;
  line-height: 1.7;
  flex-grow: 1;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-500);
}

.blog-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--primary-100), var(--accent-100));
  overflow: hidden;
  position: relative;
}

.blog-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(124, 58, 237, 0.1));
  z-index: 1;
}

.blog-body {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.blog-title {
  font-weight: 900;
  color: var(--gray-900);
  margin-bottom: 12px;
  font-size: 1.2rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.blog-excerpt {
  color: var(--gray-600);
  font-weight: 500;
  font-size: 0.95rem;
  margin-bottom: 16px;
  line-height: 1.6;
  flex-grow: 1;
}

.blog-meta {
  color: var(--gray-500);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

details {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

details:hover {
  border-color: var(--gray-300);
  box-shadow: var(--shadow-lg);
}

details[open] {
  background: var(--primary-50);
  border-color: var(--primary-500);
}

summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--gray-900);
  font-size: 1.05rem;
  padding: 4px 0;
  transition: color var(--transition-fast);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--gray-500);
  transition: transform var(--transition-base), color var(--transition-fast);
}

details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
  color: var(--primary-600);
}

details[open] summary {
  color: var(--primary-600);
}

details p {
  margin-top: 16px;
  color: var(--gray-700);
  font-weight: 500;
  line-height: 1.7;
}

/* ========================================================================= */
/* 11. CTA SECTION (Professional) */
/* ========================================================================= */

.cta {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-600));
  color: var(--white);
  border-radius: var(--radius-xl);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin: 64px 0;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  filter: blur(40px);
}

.cta-content {
  position: relative;
  z-index: 1;
  flex: 1;
}

.cta h3 {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.cta p {
  opacity: 0.95;
  font-weight: 500;
  font-size: 1.1rem;
  max-width: 600px;
  line-height: 1.6;
}

.cta .cta-btn {
  background: var(--white);
  color: var(--primary-600);
  font-weight: 800;
  padding: 16px 32px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  z-index: 1;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.cta .cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
  background: var(--gray-50);
}

/* ========================================================================= */
/* 12. FOOTER (Professional) */
/* ========================================================================= */

footer {
  margin-top: 80px;
  color: var(--gray-600);
  font-size: 0.95rem;
  padding: 48px 0 32px;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-50);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--gray-900);
  font-weight: 900;
  margin-bottom: 20px;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
}

.footer-col a {
  display: block;
  text-decoration: none;
  color: var(--gray-600);
  font-weight: 600;
  padding: 8px 0;
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.footer-col a:hover {
  color: var(--primary-600);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid var(--gray-200);
  padding-top: 24px;
  font-size: 0.9rem;
  color: var(--gray-500);
  font-weight: 500;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

/* ========================================================================= */
/* 13. RESPONSIVE ADAPTATIONS */
/* ========================================================================= */

@media (max-width: 1200px) {
  .container {
    padding: 0 32px;
  }
  
  .product-detail-content {
    gap: 32px;
    padding: 32px;
  }
  
  .product-detail-image {
    flex: 0 0 360px;
    height: 360px;
  }
}

@media (max-width: 992px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cards-3,
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .results-header {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .cta {
    flex-direction: column;
    align-items: flex-start;
    padding: 40px;
    text-align: left;
  }
  
  .cta .cta-btn {
    align-self: flex-start;
  }
  
  .product-detail-content {
    flex-direction: column;
  }
  
  .product-detail-image {
    flex: 0 0 auto;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 24px;
  }
  
  .search-box {
    flex-direction: column;
  }
  
  .search-input {
    padding: 16px 20px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
  
  .search-button {
    padding: 16px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    width: 100%;
  }
  
  .hero-badges {
    gap: 8px;
  }
  
  .pill {
    font-size: 0.8rem;
    padding: 6px 10px;
  }
  
  .stats {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .category-card {
    width: calc(50% - 10px);
    min-width: 160px;
  }
  
  .amazon-banner {
    padding: 20px;
  }
  
  .amazon-banner__content {
    gap: 16px;
    flex-direction: column;
    text-align: center;
  }
  
  .amazon-banner__cta {
    font-size: 0.95rem;
    padding: 10px 16px;
  }
  
  .results-container {
    flex-direction: column;
  }
  
  .filters-column {
    flex: 0 0 100%;
    width: 100%;
    max-width: 100%;
  }
  
  .products-column {
    width: 100%;
    max-width: 100%;
  }
  
  .filters-sidebar {
    position: relative;
    top: auto;
    width: 100%;
    max-width: 100%;
  }
  
  .price-range {
    flex-wrap: wrap;
  }
  
  .price-input {
    min-width: 0;
    width: calc(50% - 6px);
  }
  
  .cards-3,
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .spec-name {
    flex: 0 0 140px;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 20px;
  }
  
  header {
    padding: 40px 0 24px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .category-card {
    width: 100%;
    max-width: 280px;
  }
  
  .search-container {
    margin: 24px auto 12px;
  }
  
  .amazon-banner__content {
    gap: 12px;
  }
  
  .amazon-banner__badge {
    font-size: 10px;
    padding: 6px 12px;
  }
  
  .product-detail-content {
    padding: 24px;
  }
  
  .product-detail-name {
    font-size: 1.6rem;
  }
  
  .product-detail-price {
    font-size: 1.8rem;
  }
  
  .cta {
    padding: 32px 24px;
  }
  
  .cta h3 {
    font-size: 1.6rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
}

/* ========================================================================= */
/* 14. MICRO-INTERACTIONS & UTILITIES */
/* ========================================================================= */

/* Smooth focus states */
button:focus,
input:focus,
select:focus,
a:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Disable focus outline for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* Ripple effect per bottoni */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.5);
  opacity: 0;
  border-radius: 100%;
  transform: scale(1, 1) translate(-50%);
  transform-origin: 50% 50%;
}

.btn-ripple:focus:not(:active)::after {
  animation: ripple 1s ease-out;
}

@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  20% {
    transform: scale(25, 25);
    opacity: 0.3;
  }
  100% {
    transform: scale(40, 40);
    opacity: 0;
  }
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--gray-100) 0%,
    var(--gray-200) 50%,
    var(--gray-100) 100%
  );
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Fade in animations */
.fade-in {
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-400);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray-500);
}