/**
 * PK01 Responsive Styling
 * Breakpoints: 1024px (lg), 768px (md), 640px (sm)
 */

/* Mobile Hamburger & Toggle */
.pk01-mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--pk01-border);
  border-radius: var(--pk01-radius);
  padding: 0.5rem;
  color: var(--pk01-text);
  cursor: pointer;
}

.pk01-mobile-nav {
  display: none;
  position: fixed;
  top: var(--pk01-header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--pk01-surface);
  padding: var(--pk01-space-6);
  border-top: 1px solid var(--pk01-border);
  z-index: 49;
  flex-direction: column;
  gap: var(--pk01-space-4);
  overflow-y: auto;
}

.pk01-mobile-nav.is-open {
  display: flex;
}

/* Tablets & Smaller */
@media (max-width: 1024px) {
  .pk01-hero-grid {
    grid-template-columns: 1fr;
    gap: var(--pk01-space-8);
  }

  .pk01-process-track {
    grid-template-columns: repeat(2, 1fr);
  }

  .pk01-ecosystem-card {
    grid-template-columns: 1fr;
  }

  .pk01-footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pk01-portal-layout {
    flex-direction: column;
  }

  .pk01-portal-sidebar {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .pk01-portal-sidebar.collapsed .pk01-sidebar-nav {
    display: none;
  }
}

/* Mobile Screens */
@media (max-width: 768px) {
  .pk01-nav-menu, .pk01-header-actions .pk01-nav-link {
    display: none;
  }

  .pk01-mobile-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .pk01-hero-title {
    font-size: var(--pk01-text-3xl);
  }

  .pk01-hero-subtitle {
    font-size: var(--pk01-text-base);
  }

  .pk01-process-track {
    grid-template-columns: 1fr;
  }

  .pk01-grid-2, .pk01-grid-3, .pk01-grid-4 {
    grid-template-columns: 1fr;
  }

  .pk01-footer-grid {
    grid-template-columns: 1fr;
    gap: var(--pk01-space-6);
  }

  .pk01-footer-bottom {
    flex-direction: column;
    gap: var(--pk01-space-4);
    text-align: center;
  }

  .pk01-portal-topbar {
    padding: 0 var(--pk01-space-4);
  }

  .pk01-portal-body {
    padding: var(--pk01-space-4);
  }

  .pk01-btn {
    min-height: 44px; /* Accessible mobile touch target */
  }
}