/**
 * homepage-hub.css
 * Discovery-hub styles for the homepage (index-ip.php) ONLY.
 * Loaded via $additional_css in index-ip.php. All selectors are
 * scoped with the .hp- prefix so nothing leaks into other pages.
 * Reuses design-system.css tokens; adds no new colors.
 */

/* ============================================
   HERO
   ============================================ */
.hp-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  margin-bottom: var(--space-xl);
  text-align: center;
}

.hp-hero h1 {
  color: #fff;
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-tight);
}

.hp-hero-sub {
  color: rgba(255, 255, 255, 0.92);
  font-size: var(--font-size-lg);
  max-width: 640px;
  margin: 0 auto var(--space-lg);
}

/* The visitor's IP, front and center */
.hp-ip-card {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-xl);
  margin-bottom: var(--space-lg);
}

.hp-ip-label {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.85);
}

.hp-ip-value {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: #fff;
  word-break: break-all;
  margin: 0;
  line-height: var(--line-height-tight);
}

.hp-ip-version {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  opacity: 0.85;
}

/* Search affordance — focuses the existing header search input */
.hp-search-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: #fff;
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: var(--font-size-base);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hp-search-cta:hover,
.hp-search-cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--color-primary-dark);
}

/* ============================================
   SECTION HEADINGS
   ============================================ */
.hp-section {
  margin-bottom: var(--space-2xl);
}

.hp-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.hp-section-head h2 {
  margin-bottom: 0;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: var(--space-xs);
  display: inline-block;
}

.hp-section-head .hp-section-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   CATEGORY GRID
   ============================================ */
.hp-category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
}

.hp-category-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding: var(--space-lg);
  background: var(--color-bg-page);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.hp-category-card:hover,
.hp-category-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  text-decoration: none;
  color: var(--color-text-primary);
}

.hp-category-name {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
}

.hp-category-card:hover .hp-category-name {
  color: var(--color-primary);
}

.hp-category-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ============================================
   POPULAR TOOLS
   ============================================ */
.hp-popular-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-md);
}

.hp-popular-card {
  display: block;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-subtle);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.hp-popular-card:hover,
.hp-popular-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  text-decoration: none;
}

.hp-popular-name {
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
}

.hp-popular-card:hover .hp-popular-name {
  color: var(--color-primary);
}

.hp-popular-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: var(--line-height-base);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .hp-hero {
    padding: var(--space-xl) var(--space-md);
  }
  .hp-hero h1 {
    font-size: var(--font-size-3xl);
  }
  .hp-ip-value {
    font-size: var(--font-size-2xl);
  }
  .hp-category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .hp-category-grid,
  .hp-popular-grid {
    grid-template-columns: 1fr;
  }
}