/**
 * Pólya SDLC Coder - Responsive Media Queries
 * Source: DESIGN.md:286-308 (8 Canonical Apple Breakpoints)
 * Optimized for Mobile Smartphone Ergonomics & Fluid Scalability
 */

/* ==========================================================================
   1. Wide Desktop (>= 1441px)
   ========================================================================== */
@media (min-width: 1441px) {
  .tile-container,
  .global-nav-container,
  .sub-nav-container {
    max-width: var(--container-showcase-max);
    margin-left: auto;
    margin-right: auto;
  }
}

/* ==========================================================================
   2. Desktop (1069px - 1440px)
   ========================================================================== */
@media (max-width: 1440px) {
  .skills-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ==========================================================================
   3. Small Desktop (1024px - 1068px)
   ========================================================================== */
@media (max-width: 1068px) {
  .hero-headline {
    font-size: 40px;
  }

  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  .footer-directory-grid {
    gap: var(--spacing-xl);
  }
}

/* ==========================================================================
   4. Tablet Landscape (834px - 1023px)
   ========================================================================== */
@media (max-width: 1023px) {
  .triad-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .polya-book-showcase {
    grid-template-columns: 1fr;
    text-align: center;
    padding: var(--spacing-xl);
    gap: var(--spacing-xl);
  }

  .polya-book-content {
    text-align: left;
  }

  .polya-book-badges {
    justify-content: flex-start;
  }

  .problem-space-spotlight {
    grid-template-columns: 1fr;
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
  }

  .problem-spotlight-content {
    text-align: left;
  }

  .influence-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .pathology-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .stage-deepdive-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .triad-flow-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .arsenal-triptych {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-directory-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .sticky-bar-container {
    padding: 0 var(--spacing-md);
  }

  .pipeline-cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }
}

/* ==========================================================================
   5. Tablet Portrait (736px - 833px) - Global Nav Collapse
   ========================================================================== */
@media (max-width: 834px) {
  .nav-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
  }

  .global-nav-links {
    display: none;
    position: fixed;
    top: var(--height-global-nav);
    left: 0;
    right: 0;
    background-color: rgba(18, 18, 20, 0.98);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-md) var(--spacing-xl) var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    z-index: 10000;
    max-height: calc(100vh - var(--height-global-nav));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    list-style: none;
    margin: 0;
    gap: 0;
  }

  .global-nav-links.nav-open {
    display: flex;
  }

  .global-nav-links li {
    width: 100%;
    list-style: none;
  }

  .global-nav-links a {
    font-size: 16px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.88);
    display: flex;
    align-items: center;
    width: 100%;
    padding: 13px 0;
    min-height: 44px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    text-decoration: none;
    transition: color var(--transition-fade);
  }

  .global-nav-links li:last-child a {
    border-bottom: none;
  }

  .global-nav-links a:hover,
  .global-nav-links a.active {
    color: var(--color-primary-on-dark, #2997ff);
  }

  /* Sub-nav collapses category links, keeps primary CTA */
  .sub-nav-menu li:not(:last-child),
  .sub-nav-menu a:not(.btn-primary):not(.btn-utility) {
    display: none;
  }

  .sub-nav-container {
    gap: var(--spacing-sm);
  }

  .sub-nav-breadcrumb {
    max-width: calc(100% - 130px);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .sub-nav-breadcrumb-title {
    font-size: 15px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .hero-tile {
    padding: var(--spacing-xxl) var(--spacing-md);
  }

  .skills-catalog-section {
    padding: var(--spacing-xxl) var(--spacing-md);
  }

  .skill-detail-article {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .section-header-block {
    margin-bottom: var(--spacing-xl);
  }
}

/* ==========================================================================
   6. Large Phone (641px - 735px)
   ========================================================================== */
@media (max-width: 735px) {
  /* Mobile container gutter ergonomics */
  .tile-container,
  .tile-container-narrow,
  .global-nav-container,
  .sub-nav-container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }

  /* Section vertical spacing ergonomics */
  .product-tile {
    padding: var(--spacing-xl) 0;
  }

  .hero-tile {
    padding: var(--spacing-xl) 0;
  }

  .skills-catalog-section {
    padding: var(--spacing-xl) 0;
  }

  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .skill-card {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  /* Search Input: 16px font prevents iOS Safari auto-zoom on focus */
  .search-input {
    font-size: 16px;
    min-height: 44px;
  }

  .filter-chips-row,
  .category-filter-chips {
    gap: 6px;
  }

  .filter-chip,
  .filter-pill {
    font-size: 13px;
    padding: 7px 14px;
    min-height: 38px;
    display: inline-flex;
    align-items: center;
  }

  .platform-segmented-control {
    gap: 4px;
  }

  .platform-segment {
    font-size: 12px;
    padding: 6px 12px;
    min-height: 36px;
  }

  .handoff-nav {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .handoff-link.next {
    text-align: left;
  }

  /* Floating Sticky Install Bar Mobile Layout */
  .sticky-install-bar {
    height: auto;
    min-height: 56px;
    padding: 8px 0 calc(8px + env(safe-area-inset-bottom, 0px));
  }

  .sticky-bar-container {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 0 var(--spacing-md);
    text-align: center;
  }

  .sticky-bar-command {
    max-width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    font-size: 12px;
    padding: 6px 10px;
  }

  .sticky-bar-container .btn-primary {
    width: 100%;
    min-height: 40px;
    justify-content: center;
  }

  /* Editorial & Why Pólya Hero */
  .editorial-hero {
    padding: var(--spacing-xl) 0 var(--spacing-md) 0;
  }

  .editorial-title {
    font-size: clamp(26px, 6vw, 34px);
    line-height: 1.2;
    word-break: break-word;
    hyphens: auto;
  }

  .editorial-lead {
    font-size: 15px;
    line-height: 1.55;
  }

  .polya-book-showcase {
    padding: var(--spacing-lg) var(--spacing-md);
    gap: var(--spacing-lg);
  }

  .polya-book-image {
    width: 180px;
    max-width: 100%;
  }

  .polya-quote-banner {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .polya-quote-text {
    font-size: clamp(17px, 4.5vw, 22px);
    line-height: 1.45;
  }

  .influence-card,
  .problem-space-spotlight,
  .pathology-card,
  .stage-deepdive-card,
  .triad-blueprint,
  .problem-triad-card {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  /* Platform Configurator Mobile Header Stacking */
  .configurator-section {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .configurator-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    text-align: left;
  }

  .configurator-title {
    font-size: 18px;
  }

  /* 6-Phase Pipeline Responsive Layout */
  .pipeline-header {
    margin-bottom: var(--spacing-xl);
  }

  .pipeline-title {
    font-size: clamp(24px, 5.5vw, 30px);
  }

  .pipeline-cards-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
  }

  .pipeline-phase-card {
    padding: var(--spacing-md);
  }
}

/* ==========================================================================
   7. Phone (420px - 640px)
   ========================================================================== */
@media (max-width: 640px) {
  /* Hide sticky bottom install bar on mobile to preserve viewport space */
  .sticky-install-bar {
    display: none !important;
  }

  .hero-headline {
    font-size: 32px;
    letter-spacing: -0.025em;
    line-height: 1.2;
    word-break: break-word;
  }

  .hero-subhead {
    font-size: 17px;
    line-height: 1.45;
  }

  .skill-detail-title {
    font-size: 26px;
    word-break: break-word;
  }

  .skill-detail-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
  }

  .prompt-box-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-xs);
  }

  .prompt-box-header .btn-copy {
    width: 100%;
    justify-content: center;
    min-height: 44px;
  }

  .footer-directory-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .footer-col-title {
    font-size: 12px;
    margin-bottom: 8px;
  }

  .footer-link-list {
    gap: 8px;
  }

  .footer-link-list a {
    display: inline-block;
    padding: 3px 0;
    font-size: 13px;
    min-height: 28px;
  }

  .footer-bottom-bar {
    text-align: left;
    padding-top: var(--spacing-md);
  }

  /* Horizontal table scrolling protection with touch momentum */
  .docs-table {
    display: block;
    width: 100%;
    overflow-x: auto;
    min-width: 540px;
    -webkit-overflow-scrolling: touch;
  }

  .search-input-wrapper {
    max-width: 100%;
  }

  .store-utility-card {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .terminal-command-box {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
  }

  .terminal-command-box .btn-copy {
    align-self: stretch;
    width: 100%;
    min-height: 40px;
    justify-content: center;
  }

  .install-step-card {
    padding: var(--spacing-md);
  }

  .dictionary-showcase {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .dictionary-title {
    font-size: 18px;
  }

  .dictionary-desc {
    font-size: 14px;
  }

  .dictionary-chips {
    gap: 8px;
  }

  .dictionary-chip {
    padding: 5px 12px;
    font-size: 12px;
  }

  .dictionary-chip .chip-term {
    font-size: 12px;
  }

  .dictionary-chip .chip-meta {
    font-size: 11px;
  }

  /* Editorial CTA Card Mobile */
  .editorial-cta-card {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .editorial-cta-title {
    font-size: 24px;
  }

  .editorial-cta-subtitle {
    font-size: 14px;
    margin-bottom: var(--spacing-md);
  }

  .editorial-cta-actions {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-sm);
  }

  .editorial-cta-actions .btn-primary,
  .editorial-cta-actions .btn-secondary {
    width: 100%;
    min-height: 44px;
    text-align: center;
    justify-content: center;
  }

  /* Platform Configurator Mobile Layout */
  .install-method-switcher {
    display: flex;
    flex-direction: column;
    width: 100%;
    border-radius: var(--radius-md);
    padding: 5px;
    gap: 6px;
    background-color: rgba(0, 0, 0, 0.55);
    margin-bottom: var(--spacing-md);
  }

  .method-tab {
    width: 100%;
    min-height: 44px;
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 500;
    text-align: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    white-space: normal;
  }

  .configurator-chips {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-bottom: var(--spacing-md);
    width: 100%;
  }

  .configurator-chip {
    width: 100%;
    min-height: 40px;
    padding: 8px 10px;
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.25;
    border-radius: var(--radius-pill);
    word-break: break-word;
  }

  .configurator-chips .configurator-chip:last-child:nth-child(odd) {
    grid-column: span 2;
  }

  /* Single column for script panel OS chips with longer labels */
  #method-panel-script .configurator-chips {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  #method-panel-script .configurator-chip {
    min-height: 44px;
    font-size: 13px;
    padding: 10px 14px;
    justify-content: flex-start;
    text-align: left;
  }

  .install-step-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .script-benefits-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .terminal-command-box > div,
  .terminal-line {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .pipeline-cards-grid {
    gap: 12px;
    margin-bottom: var(--spacing-lg);
  }

  .pipeline-phase-card {
    padding: 16px 14px;
    border-radius: var(--radius-md);
  }

  .phase-card-title {
    font-size: 16px;
  }

  .phase-card-desc {
    font-size: 13.5px;
    margin-bottom: 10px;
  }

  .phase-card-code {
    font-size: 11.5px;
  }
}

/* ==========================================================================
   8. Small Phone (<= 419px) - iPhone SE, Galaxy S, 320px - 375px
   ========================================================================== */
@media (max-width: 419px) {
  /* Tighter gutters for extreme compact viewports */
  .tile-container,
  .tile-container-narrow,
  .global-nav-container,
  .sub-nav-container {
    padding-left: 14px;
    padding-right: 14px;
  }

  .hero-headline {
    font-size: 26px;
    line-height: 1.2;
  }

  .hero-subhead {
    font-size: 15px;
  }

  .editorial-title {
    font-size: 22px;
    line-height: 1.25;
  }

  .editorial-eyebrow {
    font-size: 10px;
    letter-spacing: 0.05em;
  }

  .skill-detail-title {
    font-size: 24px;
  }

  .breadcrumb-trail {
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .sub-nav-breadcrumb-tag {
    display: none;
  }

  .sub-nav-breadcrumb-title {
    font-size: 14px;
  }

  .sub-nav-menu .btn-primary {
    padding: 6px 12px;
    font-size: 12px;
    min-height: 34px;
  }

  .polya-book-badge {
    width: 100%;
    justify-content: center;
    font-size: 12px;
    padding: 6px 10px;
  }

  .dictionary-chip {
    width: 100%;
    justify-content: space-between;
  }

  .terminal-command-box {
    padding: 12px;
  }

  .terminal-code {
    font-size: 11px;
  }

  .btn-capsule,
  .btn-utility {
    min-height: 44px;
    padding: 10px 18px;
    width: 100%;
    justify-content: center;
  }

  .filter-chip,
  .filter-pill {
    padding: 6px 10px;
    font-size: 12px;
    min-height: 36px;
  }

  .platform-segment {
    padding: 6px 8px;
    font-size: 11px;
    min-height: 34px;
  }

  .pause-rule-banner {
    flex-direction: column;
    padding: var(--spacing-md);
  }

  .pause-rule-icon {
    font-size: 22px;
  }

  .configurator-section {
    padding: var(--spacing-md) 12px;
    border-radius: var(--radius-md);
  }

  .configurator-title {
    font-size: 16px;
  }

  .configurator-chip {
    font-size: 11px;
    padding: 7px 6px;
    min-height: 38px;
  }

  .install-step-card {
    padding: 12px;
  }

  .install-step-title {
    font-size: 13px;
  }

  .install-step-note {
    font-size: 12px;
  }

  .pipeline-header {
    margin-bottom: var(--spacing-lg);
  }

  .pipeline-title {
    font-size: 22px;
  }

  .pipeline-desc {
    font-size: 13.5px;
  }

  .pipeline-phase-card {
    padding: 14px 12px;
  }

  .pause-rule-banner {
    padding: var(--spacing-md) 14px;
    margin: var(--spacing-md) 0;
  }

  .pause-rule-title {
    font-size: 17px;
  }

  .pause-rule-desc {
    font-size: 13px;
  }
}