/* ==========================================================================
   ImageResizerAI - Unified SaaS Hub Design System (hub-theme.css)
   Instagram Card Shape & Layout Standard | Core Web Vitals Optimized
   ========================================================================== */

:root {
  --hub-bg: #f0f4f9;
  --hub-card-bg: #ffffff;
  --hub-text-primary: #0f2d59;
  --hub-text-secondary: #5f728d;
  --hub-border: #e2eaf4;
  --hub-border-hover: rgba(30, 92, 203, 0.2);
  --hub-primary: #1e5ccb;
  --hub-primary-hover: #164bb0;
  --hub-shadow-soft: 0 4px 15px rgba(15, 45, 89, 0.04);
  --hub-shadow-hover: 0 20px 40px rgba(15, 45, 89, 0.08);
  --hub-radius: 16px;
  --hub-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  background-color: var(--hub-bg);
  color: var(--hub-text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.hub-container, .container {
  max-width: 1024px;
  margin: 0 auto;
  padding: 24px 16px;
  box-sizing: border-box;
}

/* Breadcrumbs */
.breadcrumbs, .hub-breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--hub-text-secondary);
  margin-bottom: 24px;
}

.breadcrumbs a, .hub-breadcrumb-nav a {
  color: var(--hub-primary);
  text-decoration: none;
}

.breadcrumbs a:hover, .hub-breadcrumb-nav a:hover {
  text-decoration: underline;
}

/* Responsive Grid (4 cols desktop, 2 cols tablet, 1 col mobile) */
.tools-grid, .hub-grid, .platform-card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

@media (max-width: 1024px) {
  .tools-grid, .hub-grid, .platform-card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .tools-grid, .hub-grid, .platform-card-grid {
    grid-template-columns: 1fr;
  }
}

/* Tool Grid Card - Matching Instagram Tool Card Shape */
.tool-grid-card, .hub-card {
  background-color: var(--hub-card-bg);
  border-radius: var(--hub-radius);
  border: 1px solid var(--hub-border);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  box-shadow: var(--hub-shadow-soft);
  transition: var(--hub-transition);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
}

.tool-grid-card:hover, .hub-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--hub-shadow-hover);
  border-color: var(--hub-border-hover);
}

.card-badge, .hub-card-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

.card-badge.popular {
  background: linear-gradient(45deg, #f09433, #dc2743, #bc1888);
  color: #ffffff;
}

.card-badge.active, .card-badge.pro, .card-badge.new {
  background: #e8f0fe;
  color: var(--hub-primary);
}

.card-icon-container, .hub-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: #e8f0fe;
  color: var(--hub-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 24px;
}

.card-title, .hub-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--hub-text-primary);
  margin: 0 0 10px 0;
  line-height: 1.3;
}

.card-desc, .hub-card-desc {
  font-size: 13.5px;
  color: var(--hub-text-secondary);
  line-height: 1.5;
  margin: 0 0 20px 0;
  flex-grow: 1;
}

.btn-card-open, .hub-card-action {
  background-color: var(--hub-primary);
  color: #ffffff;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--hub-transition);
  margin-top: auto;
}

.tool-grid-card:hover .btn-card-open, .hub-card:hover .btn-card-open {
  background-color: var(--hub-primary-hover);
  box-shadow: 0 4px 12px rgba(30, 92, 203, 0.25);
}

/* Category Chips Bar */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 30px;
}

.filter-tab {
  background-color: #e2e8f0;
  border: none;
  color: var(--hub-text-secondary);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--hub-transition);
}

.filter-tab:hover, .filter-tab.active {
  background-color: var(--hub-primary);
  color: #ffffff;
}

/* AEO Questions Accordion */
.hub-faq-item {
  background: #ffffff;
  border: 1px solid var(--hub-border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 12px;
}