/* ==========================================================================
   UkrBilling Content & SEO Hub Styles
   Extends styles.css design system for guides and integration pillar pages
   ========================================================================== */

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 24px;
}

.breadcrumbs a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--text-primary);
  text-decoration: underline;
}

.breadcrumbs-sep {
  color: var(--border-highlight);
  user-select: none;
}

.breadcrumbs-current {
  color: var(--text-primary);
  font-weight: 500;
}

/* Content Layout */
.content-wrapper {
  padding: 40px 0 80px;
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.article-container {
  max-width: 840px;
  margin: 0 auto;
}

.hub-container {
  max-width: 1040px;
  margin: 0 auto;
}

/* Article Header */
.article-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 32px;
}

.article-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--surface-subtle);
  border: 1px solid var(--border-highlight);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.article-badge.badge-integration {
  border-color: rgba(99, 102, 241, 0.4);
  color: #a5b4fc;
}

.article-badge.badge-guide {
  border-color: rgba(34, 197, 94, 0.4);
  color: #86efac;
}

.article-title {
  font-size: 36px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.article-lead {
  font-size: 18px;
  line-height: 1.6;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-tertiary);
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Article Body Typography & Flow */
.article-body {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 26px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-body h3 {
  font-size: 20px;
  line-height: 1.4;
  font-weight: 600;
  color: var(--text-primary);
  margin: 32px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body p strong {
  color: var(--text-primary);
  font-weight: 600;
}

.article-body ul,
.article-body ol {
  margin: 0 0 24px 24px;
}

.article-body li {
  margin-bottom: 10px;
  padding-left: 4px;
}

.article-body li::marker {
  color: var(--accent);
}

.article-body a {
  color: #818cf8;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}

.article-body a:hover,
.article-body a:focus-visible {
  color: #c7d2fe;
}

.article-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Content Images */
.article-image-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 32px 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.article-image-box img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.article-image-caption {
  padding: 12px 18px;
  font-size: 13px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
  background: var(--surface-subtle);
}

/* Callouts / Alerts */
.callout {
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 28px 0;
  background: var(--surface);
  border-left: 4px solid var(--border-highlight);
  font-size: 15px;
  line-height: 1.6;
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout-title {
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.callout-info {
  background: rgba(99, 102, 241, 0.08);
  border-left-color: var(--accent);
}
.callout-info .callout-title {
  color: #a5b4fc;
}

.callout-success {
  background: rgba(34, 197, 94, 0.08);
  border-left-color: var(--green);
}
.callout-success .callout-title {
  color: #86efac;
}

.callout-warning {
  background: rgba(234, 179, 8, 0.08);
  border-left-color: #eab308;
}
.callout-warning .callout-title {
  color: #fde047;
}

/* CRM Note Preview Simulation */
.crm-note-box {
  background: #0d121f;
  border: 1px solid #293548;
  border-radius: 10px;
  padding: 18px 20px;
  margin: 24px 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.7;
  color: #cbd5e1;
  position: relative;
}

.crm-note-badge {
  display: inline-block;
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 4px;
  background: #1e293b;
  color: #94a3b8;
  margin-bottom: 12px;
}

.crm-note-box b {
  color: #f1f5f9;
}

.crm-note-box a {
  color: #38bdf8;
  text-decoration: underline;
}

/* Flow Step Boxes (Automation chain presentation) */
.flow-diagram {
  margin: 36px 0;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.flow-diagram-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  text-align: center;
}

.flow-chain {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 12px;
  position: relative;
}

.flow-node {
  flex: 1;
  background: var(--surface-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  min-width: 0;
}

.flow-node:hover,
.flow-node:focus-visible {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.flow-node-step {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 6px;
}

.flow-node-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.3;
}

.flow-node-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.flow-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 18px;
  flex-shrink: 0;
  user-select: none;
}

/* Comparison Table */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 32px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.compare-table {
  min-width: 580px;
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.compare-table th,
.compare-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.compare-table th {
  background: var(--surface-subtle);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table td:first-child {
  font-weight: 600;
  color: var(--text-primary);
}

/* CTA Banner */
.content-cta-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(34, 197, 94, 0.1) 100%), var(--surface);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin: 50px 0 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.content-cta-banner h3 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.content-cta-banner p {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 24px;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}

/* Hub Grid Cards */
.hub-section {
  margin-bottom: 56px;
}

.hub-section-header {
  margin-bottom: 24px;
}

.hub-section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.hub-section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.card-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

.card-item:hover,
.card-item:focus-visible {
  border-color: var(--border-highlight);
  background: var(--surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.card-item-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--surface-subtle);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
  margin-bottom: 12px;
  align-self: flex-start;
}

.card-item-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.35;
}

.card-item-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 16px;
  flex: 1;
}

.card-item-cta {
  font-size: 13px;
  font-weight: 600;
  color: #818cf8;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* FAQ Block */
.content-faq {
  margin: 48px 0;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 20px;
}

.faq-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.faq-question {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.faq-answer {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* Mobile & Responsive Adaptations */
@media (max-width: 900px) {
  .flow-chain {
    flex-direction: column;
    gap: 14px;
  }
  .flow-arrow {
    transform: rotate(90deg);
    padding: 4px 0;
  }
  .article-title {
    font-size: 28px;
  }
  .article-lead {
    font-size: 16px;
  }
  .article-body h2 {
    font-size: 22px;
  }
}

@media (max-width: 640px) {
  .content-wrapper {
    padding: 24px 0 60px;
  }
  .article-container,
  .hub-container {
    padding: 0 4px;
  }
  .content-cta-banner {
    padding: 24px 18px;
  }
  .content-cta-banner h3 {
    font-size: 20px;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .card-item,
  .flow-node,
  .btn {
    transition: none !important;
    transform: none !important;
  }
}