/* === Email Campaign Manager Knowledge Base – Modern Design === */

:root {
  --kb-bg-primary: #ffffff;
  --kb-bg-secondary: #f8fafc;
  --kb-bg-card: #ffffff;
  --kb-accent-primary: #3b82f6;
  --kb-accent-secondary: #8b5cf6;
  --kb-accent-light: #dbeafe;
  --kb-text-primary: #0f172a;
  --kb-text-secondary: #475569;
  --kb-text-muted: #64748b;
  --kb-border: #e2e8f0;
  --kb-success: #10b981;
  --kb-warning: #f59e0b;
  --kb-danger: #ef4444;
  --kb-shadow: rgba(15, 23, 42, 0.08);
  --kb-shadow-lg: rgba(15, 23, 42, 0.12);
  --kb-sidebar-width: 280px;
  --kb-max-width: 1200px;
}

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

/* Bottoni di navigazione sopra il contenuto */
.kb-navigation-buttons {
  display: flex;
  justify-content: center;
  gap: 1.25rem; 
  margin-bottom: 0.5rem; 
  width: 100%;
}

.kb-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 0.1rem 0.1rem; 
  background: var(--kb-bg-card);
  border: 1px solid var(--kb-border);
  border-radius: 14px; 
  color: var(--kb-text-primary);
  font-weight: 600;
  font-size: 0.9375rem; 
  transition: all 0.25s ease;
  min-width: 100px; 
  box-shadow: 0 1px 4px var(--kb-shadow); 
}

.kb-nav-btn:hover {
  transform: translateY(-2px); 
  box-shadow: 0 4px 12px var(--kb-shadow-lg);
  border-color: var(--kb-accent-primary);
}

.kb-btn-icon {
  font-size: 1.5rem; 
  margin-bottom: 0.4rem; 
}

.kb-btn-text {
  font-size: 0.875rem; 
  text-align: center;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--kb-bg-primary);
  color: var(--kb-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative; 
}


body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #f0f0f0;
  background-image: url('../img/logo.png');
  background-size: cover;
  background-size: auto; 
  opacity: 0.03; 
  pointer-events: none; 
  z-index: -1; 
}

/* Container principale */
.kb-container {
  display: flex;
  max-width: var(--kb-max-width);
  margin: 0 auto;
  min-height: 100vh;
  padding: 1rem 1.5rem;
  gap: 2rem;
}

/* Sidebar di navigazione */
.kb-sidebar {
  width: var(--kb-sidebar-width);
  background: var(--kb-bg-card);
  border: 1px solid var(--kb-border);
  border-radius: 16px;
  padding: 1.5rem;
  height: fit-content;
  position: sticky;
  top: 2rem;
  box-shadow: 0 4px 12px var(--kb-shadow);
  overflow-y: auto;
  max-height: calc(100vh - 4rem);
}

.kb-sidebar h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--kb-text-primary);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--kb-border);
}

.kb-nav-list {
  list-style: none;
}

.kb-nav-item {
  margin-bottom: 0.5rem;
}

.kb-nav-link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--kb-text-secondary);
  text-decoration: none;
  border-radius: 10px;
  font-size: 0.9375rem;
  transition: all 0.2s ease;
}

.kb-nav-link:hover {
  background: var(--kb-bg-secondary);
  color: var(--kb-text-primary);
}

.kb-nav-link.active {
  background: var(--kb-accent-light);
  color: var(--kb-accent-primary);
  font-weight: 600;
}

/* Contenuto principale */
.kb-main {
  flex: 1;
  background: var(--kb-bg-card);
  border: 1px solid var(--kb-border);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: 0 4px 12px var(--kb-shadow);
  overflow-y: auto;
  max-height: calc(100vh - 4rem);
}

.kb-section {
  display: none;
  animation: fadeInUp 0.5s ease forwards;
}

.kb-section.active {
  display: block;
}

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

.kb-section h2 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--kb-text-primary);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--kb-border);
}

.kb-section h3 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--kb-text-primary);
  margin: 1.75rem 0 1rem;
}

.kb-section h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--kb-text-primary);
  margin: 1.5rem 0 0.75rem;
}

.kb-section p {
  color: var(--kb-text-secondary);
  margin-bottom: 1rem;
  line-height: 1.75;
}

.kb-section ul, .kb-section ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.kb-section li {
  margin-bottom: 0.5rem;
  color: var(--kb-text-secondary);
}

.kb-section strong {
  color: var(--kb-text-primary);
  font-weight: 600;
}

.kb-section code {
  background: var(--kb-bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.9375rem;
  color: var(--kb-text-primary);
}

/* Contenitore immagine-testo */
.kb-content-row {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin: 2rem 0;
}

.kb-text-content {
  flex: 1;
}

.kb-image-content {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.kb-image-content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px var(--kb-shadow);
  border: 1px solid var(--kb-border);
}

/* Badge e icone */
.kb-badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background: var(--kb-accent-light);
  color: var(--kb-accent-primary);
  border-radius: 20px;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.kb-icon {
  font-size: 1.5rem;
  margin-right: 0.5rem;
  vertical-align: middle;
}

/* Header e linguaggio */
.kb-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--kb-border);
}

.kb-header h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--kb-text-primary);
  letter-spacing: -0.02em;
}

.lang-switcher-kb {
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  padding: 0.5rem 1rem;
  border: 1px solid var(--kb-border);
  background: white;
  color: var(--kb-text-secondary);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.lang-btn:hover {
  border-color: var(--kb-accent-primary);
  color: var(--kb-accent-primary);
}

.lang-btn.active {
  background: var(--kb-accent-primary);
  color: white;
  border-color: var(--kb-accent-primary);
}

/* Contact Button */
.kb-contact-btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  background: var(--kb-accent-primary);
  color: white;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 600;
  transition: all 0.2s ease;
  margin-top: 1rem;
}

.kb-contact-btn:hover {
  background: var(--kb-accent-secondary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--kb-shadow-lg);
}

/* Responsive */
@media (max-width: 1100px) {
  .kb-container {
    flex-direction: column;
  }

  .kb-sidebar {
    width: 100%;
    position: static;
    max-height: unset;
    margin-bottom: 1.5rem;
  }

  .kb-content-row {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .kb-main, .kb-sidebar {
    padding: 1.5rem;
  }

  .kb-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .kb-header h1 {
    font-size: 1.5rem;
  }

  .kb-main {
    padding: 1.5rem;
  }
}