/**
 * OperatorPod Responsive Breakpoints & Mobile Layout System.
 * Fully optimized for all device widths (320px to 1440px+).
 */

/* Prevent horizontal scroll on all viewports */
html, body {
  max-width: 100vw;
  overflow-x: hidden;
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

img, svg {
  max-width: 100%;
  height: auto;
}

/* ==========================================================================
   Desktop & Tablet Large (<= 1100px)
   ========================================================================== */
@media (max-width: 1100px) {
  .op-hero-grid {
    gap: 2rem;
  }
  
  .op-hero-title {
    font-size: 2.5rem;
  }

  .op-nav-list {
    gap: 1rem;
  }
}

/* ==========================================================================
   Tablet Medium (<= 1024px) — Switch to Mobile Navigation
   ========================================================================== */
@media (max-width: 1024px) {
  /* Mobile Toggle Visible */
  .op-mobile-toggle {
    display: flex;
  }

  /* Full-width slide-down navigation drawer */
  .op-header-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #FFFFFF;
    border-bottom: 2px solid var(--op-border);
    box-shadow: var(--op-shadow-xl);
    padding: 1.25rem 1.5rem 2rem;
    flex-direction: column;
    align-items: stretch;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s;
    max-height: calc(100vh - 72px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 9998;
  }

  .op-header-nav.op-menu-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .op-nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .op-nav-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    font-size: 1.0625rem;
    font-weight: 600;
    border-radius: var(--op-radius-sm);
    min-height: 44px;
  }

  .op-nav-link:hover,
  .op-nav-link:focus {
    background: var(--op-bg-subtle);
  }

  /* Submenu Accordion inside Mobile Nav */
  .op-dropdown-menu {
    position: static;
    display: none;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 1px solid var(--op-border);
    padding: 8px 12px;
    margin: 4px 0 8px 12px;
    background: var(--op-bg-subtle);
    border-radius: var(--op-radius-md);
  }

  .op-dropdown-wrap.op-mobile-dropdown-open .op-dropdown-menu {
    display: block;
  }

  .op-dropdown-wrap.op-mobile-dropdown-open .op-dropdown-arrow,
  .op-dropdown-wrap.op-mobile-dropdown-open .op-dropdown-chevron {
    transform: rotate(180deg);
  }

  .op-dropdown-menu li a {
    padding: 10px 12px;
    font-size: 0.9375rem;
    min-height: 40px;
    display: flex;
    align-items: center;
  }

  /* Hamburger Active Animation */
  .op-mobile-toggle.op-is-active .op-hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .op-mobile-toggle.op-is-active .op-hamburger-line:nth-child(2) {
    opacity: 0;
  }
  .op-mobile-toggle.op-is-active .op-hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* Hero Section Stacking */
  .op-hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .op-hero-preview-col {
    order: -1;
  }

  .op-hero-floating-card {
    position: static;
    width: 100%;
    margin-top: 1rem;
    box-shadow: var(--op-shadow-md);
  }

  .op-floating-k8s-badge {
    top: -12px;
    right: 8px;
    width: 44px;
    height: 44px;
  }

  .op-floating-k8s-badge svg {
    width: 26px;
    height: 26px;
  }

  /* Tool Workspace Stack */
  .op-tool-workspace {
    grid-template-columns: 1fr;
  }

  /* Tools Directory Layout */
  .op-tools-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .op-tools-sidebar {
    position: static;
    width: 100%;
  }

  .op-sidebar-cat-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .op-sidebar-cat-btn {
    border-radius: var(--op-radius-pill);
    padding: 6px 14px;
    border: 1px solid var(--op-border);
    background: #FFFFFF;
  }

  /* Guide Single Layout */
  .op-guide-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .op-guide-sidebar-nav {
    position: static;
    width: 100%;
    margin-bottom: 1.5rem;
  }

  .op-sb-nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .op-sb-nav-item a {
    padding: 6px 12px;
    font-size: 0.8125rem;
  }

  /* Features Grid 2-columns */
  .op-features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  /* Footer 2-columns */
  .op-footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem 1.5rem;
  }
}

/* ==========================================================================
   Mobile Landscape & Tablet Small (<= 768px)
   ========================================================================== */
@media (max-width: 768px) {
  /* Header Actions Compact */
  .op-btn-header-cta {
    display: none; /* Hide top-bar CTA; accessible in mobile menu */
  }

  .op-section {
    padding: 3rem 0;
  }

  .op-hero-section {
    padding: 2.5rem 0 3rem;
  }

  .op-hero-title {
    font-size: 2.25rem;
  }

  /* Use Cases split grid to 1-col */
  .op-use-case-split {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  /* Contact cards grid to 1-col */
  .op-contact-cards-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  /* Tool Guide Grid & Sidebar */
  .op-guide-grid {
    grid-template-columns: 1fr;
  }

  .op-guide-sidebar {
    order: 2;
  }

  /* Tables wrap horizontally */
  .op-table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--op-radius-sm);
    border: 1px solid var(--op-border);
    margin: 1.5rem 0;
  }

  .op-table {
    min-width: 540px;
  }

  /* Code Blocks in Guides */
  .op-cmd-item .op-code-block {
    overflow-x: auto;
  }

  /* Blog Grid */
  .op-blog-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Mobile Standard (<= 640px)
   ========================================================================== */
@media (max-width: 640px) {
  .op-container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .op-hero-title {
    font-size: 1.95rem;
    line-height: 1.2;
  }

  .op-hero-subtitle {
    font-size: 1rem;
  }

  .op-hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .op-hero-actions .op-btn {
    width: 100%;
    justify-content: center;
  }

  .op-hero-trust-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    margin-top: 1.5rem;
  }

  /* Features Grid 1-column */
  .op-features-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* Popular Tools Grid 1-column */
  .op-tools-grid {
    grid-template-columns: 1fr;
  }

  .op-cheatsheets-grid {
    grid-template-columns: 1fr;
  }

  .op-guides-grid {
    grid-template-columns: 1fr;
  }

  /* Footer 1-column */
  .op-footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .op-footer-bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  /* Header Favorites Button (icon + counter only) */
  .op-favorites-btn span:first-of-type {
    display: none;
  }

  .op-favorites-btn {
    padding: 6px 10px;
  }

  /* Single Tool Header Main */
  .op-tool-header-main {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .op-tool-main-icon-wrap {
    width: 48px;
    height: 48px;
  }

  .op-tool-main-icon {
    width: 26px;
    height: 26px;
  }

  .op-tool-title {
    font-size: 1.75rem;
  }

  .op-tool-pills-list {
    flex-wrap: wrap;
    gap: 6px;
  }

  .op-tool-badge-pill {
    font-size: 0.75rem;
    padding: 3px 8px;
  }

  /* Editor Toolbar Buttons Wrap */
  .op-editor-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .op-footer-left {
    width: 100%;
    display: flex;
    justify-content: flex-start;
  }

  .op-footer-left .op-btn {
    flex: 1;
    text-align: center;
  }

  .op-char-counter {
    text-align: right;
  }

  /* Search Modal */
  .op-search-modal-dialog {
    margin: 1.5rem 1rem;
    max-width: calc(100% - 2rem);
  }
}

/* ==========================================================================
   Small Mobile Viewports (<= 480px & 360px)
   ========================================================================== */
@media (max-width: 480px) {
  .op-header-inner {
    height: 60px;
  }

  .op-header-nav {
    top: 60px;
    max-height: calc(100vh - 60px);
  }

  .op-brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
  }

  .op-logo-svg {
    width: 18px;
    height: 18px;
  }

  .op-brand-text {
    font-size: 1.1875rem;
  }

  .op-header-actions {
    gap: 6px;
  }

  .op-action-btn {
    padding: 6px 8px;
  }

  .op-page-title {
    font-size: 1.75rem;
  }

  .op-section-title {
    font-size: 1.625rem;
  }

  .op-hero-mockup-window {
    border-radius: var(--op-radius-md);
  }

  .op-mockup-code {
    font-size: 0.75rem;
    padding: 0.875rem;
  }

  .op-guide-banner-illustration {
    padding: 1rem;
    margin: 1.25rem 0;
  }
}