/* ==========================================================================
   RESPONSIVE DESIGN SUITE (css/responsive.css)
   Consolidated laptop, tablet, and mobile-first responsive architecture.
   ========================================================================== */

/* ==========================================================================
   1. LAPTOP / DESKTOP RESPONSIVE DESIGN (min-width: 1025px)
   ========================================================================== */

@media (min-width: 1025px) {
  /* Fluid typography and container scaling for laptop viewports */
  .container {
    max-width: 1380px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 2rem;
    padding-right: 2rem;
  }

  /* 4-Column Grid for Services on Laptop/Desktop */
  .pricing-grid-faq {
    display: grid !important;
    grid-template-columns: repeat(4, minmax(0, 1fr)) !important;
    gap: 1.5rem !important;
  }

  /* 3-Column Grid for Parity Tiers on Laptop/Desktop */
  .parity-tiers-grid {
    display: grid !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: 1.5rem !important;
  }

  /* Dual column layout for calculator on Laptop/Desktop */
  .calc-grid {
    display: grid !important;
    grid-template-columns: 1.15fr 0.85fr !important;
    gap: 2.5rem !important;
  }
}

/* ==========================================================================
   2. TABLET RESPONSIVE DESIGN (769px to 1024px)
   ========================================================================== */

@media (max-width: 1024px) and (min-width: 769px) {
  /* Container adjustments for tablet */
  .container {
    padding-left: 1.5rem !important;
    padding-right: 1.5rem !important;
  }

  /* 2-Column Grid for Services on Tablet */
  .pricing-grid-faq {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 1.25rem !important;
  }

  /* 2-Column Grid for Parity Tiers on Tablet */
  .parity-tiers-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 1.25rem !important;
  }

  /* Stack Calculator or use balanced 1-col on tablet if narrow */
  .calc-grid {
    grid-template-columns: 1fr !important;
    gap: 2rem !important;
  }

  .calc-field-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  /* Typography safety on tablet */
  h1.section-title,
  h1 {
    font-size: clamp(2rem, 4vw, 2.75rem) !important;
    line-height: 1.25 !important;
    word-break: break-word !important;
  }

  h2.section-title,
  h2 {
    font-size: clamp(1.6rem, 3.2vw, 2.2rem) !important;
    line-height: 1.3 !important;
    word-break: break-word !important;
  }

  .section-sub {
    font-size: 1.05rem !important;
    line-height: 1.65 !important;
  }
}

/* ==========================================================================
   3. MODERN MOBILE & UNIVERSAL RESPONSIVE LAYER
   ========================================================================== */

/* Global, all viewports */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

h1, h2, h3, h4 {
  overflow-wrap: break-word;
  text-wrap: balance;
}

:where(p, li, blockquote) {
  overflow-wrap: break-word;
  text-wrap: pretty;
}

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

:not(pre) > code {
  overflow-wrap: anywhere;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Responsive tables: stack at narrow container width (guide: responsive-table) */
.rt-wrap {
  container-type: inline-size;
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@container (width < 640px) {
  table.rt-stack,
  table.rt-stack tbody,
  table.rt-stack tr,
  table.rt-stack td,
  table.rt-stack th {
    display: block !important;
    width: 100% !important;
  }

  table.rt-stack thead {
    display: none !important;
  }

  table.rt-stack tr {
    margin: 0 0 1rem !important;
    border: 1px solid var(--border, rgba(56, 189, 248, 0.2)) !important;
    border-radius: var(--radius, 10px) !important;
    overflow: hidden !important;
    background: rgba(15, 23, 42, 0.75) !important;
  }

  table.rt-stack td {
    padding: 0.65rem 0.9rem !important;
    border: none !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07) !important;
    text-align: left !important;
  }

  table.rt-stack td:last-child {
    border-bottom: none !important;
  }

  table.rt-stack td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 0.2rem;
    font-family: var(--font-mono, monospace);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gold, #fbbf24);
    font-weight: 700;
  }

  table.rt-stack td:first-child {
    background: rgba(251, 191, 36, 0.12) !important;
    font-weight: 700 !important;
    color: #ffffff !important;
    font-size: 0.95rem !important;
    border-bottom: 1px solid rgba(251, 191, 36, 0.25) !important;
  }

  table.rt-stack td:first-child::before {
    display: none !important;
  }
}

/* Phones & Compact Viewports (<= 768px) */
@media (max-width: 768px) {
  /* Prevent horizontal blowout safely */
  html, body {
    overflow-x: clip;
    width: 100%;
    max-width: 100vw;
  }

  /* Safe container and section padding */
  .container,
  .container-wide,
  .service-spec-section,
  .articles-carousel-section {
    padding-left: 1rem !important;
    padding-right: 1rem !important;
    box-sizing: border-box !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  main section {
    padding-left: 1rem;
    padding-right: 1rem;
    padding-top: clamp(2.5rem, 8vw, 4rem);
    padding-bottom: clamp(2.5rem, 8vw, 4rem);
    box-sizing: border-box;
  }

  /* Service pages inline card padding relief */
  section > div[style*="padding:2.5rem"],
  section > div[style*="padding: 2.5rem"] {
    padding: 1.25rem 1rem !important;
    border-radius: 14px !important;
  }

  ul[style*="margin-left:1.5rem"],
  ul[style*="margin-left: 1.5rem"] {
    margin-left: 1.15rem !important;
  }

  /* Nav brand tap target fix */
  .nav-brand {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  /* Lock body scroll when mobile nav drawer is open */
  body:has(.nav-toggle:checked) {
    overflow: hidden !important;
  }

  /* Typography fluid scaling */
  h1.section-title,
  h1.hero-title,
  h1 {
    font-size: clamp(1.75rem, 6.5vw, 2.35rem) !important;
    line-height: 1.25 !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
    hyphens: auto !important;
  }

  h2.section-title,
  h2 {
    font-size: clamp(1.35rem, 5vw, 1.85rem) !important;
    line-height: 1.3 !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  h3 {
    font-size: clamp(1.15rem, 4.2vw, 1.45rem) !important;
    line-height: 1.35 !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  p, .section-sub, .lead, .hero-desc, .audience-desc, .collab-desc {
    font-size: 0.98rem !important;
    line-height: 1.62 !important;
    word-break: break-word !important;
    overflow-wrap: break-word !important;
  }

  /* Single-column grid stacking */
  .pricing-summary-grid,
  .toc-grid,
  .pricing-grid-faq,
  .parity-tiers-grid,
  .calc-grid,
  .calc-field-grid,
  .packages-grid,
  .tier-cards-grid,
  .workflow-grid,
  .contact-grid,
  .writing-columns,
  .writing-columns-wide,
  .form-row,
  .manifesto-comparison-grid,
  .manifesto-comparison-box,
  .personal-card-grid {
    grid-template-columns: 1fr !important;
    gap: 1.25rem !important;
  }

  /* Home Navigation Grid: 2 columns on mobile portrait */
  .home-nav-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.85rem !important;
  }

  /* Stats strip: 2x2 grid */
  .stats-strip {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  /* Hero adjustments */
  .hero {
    min-height: auto !important;
    padding: 3rem 1rem 2rem !important;
  }

  .hero-avatar {
    width: min(220px, 75vw) !important;
    height: min(220px, 75vw) !important;
    margin: 0 auto 1.5rem !important;
  }

  .hero-subsubtitles {
    flex-direction: column !important;
    gap: 0.4rem !important;
  }

  .hero-subsubtitles .subsubtitle-sep {
    display: none !important;
  }

  .hero-ctas {
    flex-direction: column !important;
    width: 100% !important;
    gap: 0.75rem !important;
  }

  .hero-ctas .btn,
  .hero-ctas a.btn {
    width: 100% !important;
    justify-content: center !important;
  }

  /* Minimum 44px touch targets on interactive controls */
  .btn,
  a.btn,
  .home-nav-btn,
  .tier-btn,
  .search-btn,
  .cta-btn {
    min-height: 44px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    touch-action: manipulation;
  }

  /* Card padding and containment */
  .collab-card,
  .metric-card,
  .audience-card,
  .price-card-faq,
  .package-card,
  .ppp-container,
  .parity-calc-card,
  .radical-callout-banner,
  .content-card,
  .toc-card,
  .service-spec-card,
  .service-synth-card,
  .curriculum-phase-card,
  .manifesto-card,
  .contact-card,
  .faq-card {
    padding: 1.35rem 1rem !important;
    border-radius: var(--radius-lg, 14px) !important;
    box-sizing: border-box !important;
    max-width: 100% !important;
  }

  /* Inputs, selects, and textareas: 16px font prevents iOS automatic zoom */
  input,
  select,
  textarea,
  .form-input {
    font-size: 16px !important;
    min-height: 44px !important;
    box-sizing: border-box !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  /* Footer responsiveness */
  .footer-top {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 1.75rem !important;
  }

  .footer-bottom {
    flex-direction: column !important;
    align-items: center !important;
    text-align: center !important;
    gap: 0.85rem !important;
  }

  .newsletter-card {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.85rem !important;
    padding: 1.15rem 1rem !important;
  }

  .newsletter-card .btn,
  .newsletter-card a.btn {
    width: 100% !important;
    justify-content: center !important;
  }
}

/* Touch device specific adjustments */
@media (pointer: coarse) {
  button,
  .btn,
  a.btn,
  .home-nav-btn,
  .tier-btn,
  .filter-chip {
    min-height: 44px;
    touch-action: manipulation;
  }
}

/* ==========================================================================
   4. EXTRA SMALL MOBILE VIEWPORTS (max-width: 480px)
   ========================================================================== */

@media (max-width: 480px) {
  /* Full width primary action buttons on compact screens */
  .btn,
  a.btn,
  .btn-gold,
  .btn-cyan,
  .btn-linkedin,
  .btn-topmate,
  .btn-pricing-cta,
  .home-nav-btn {
    width: 100% !important;
    justify-content: center !important;
    text-align: center !important;
  }

  /* Single-column Home Nav Grid for narrow screens */
  .home-nav-grid {
    grid-template-columns: 1fr !important;
    gap: 0.85rem !important;
  }

  /* Single column stats strip */
  .stats-strip {
    grid-template-columns: 1fr !important;
  }

  .stat-item {
    border-right: none !important;
    border-bottom: 1px solid var(--border) !important;
  }

  .stat-item:last-child {
    border-bottom: none !important;
  }

  /* Calculator single tier cards */
  .calc-tier-grid {
    grid-template-columns: 1fr !important;
  }

  .calc-display-price {
    font-size: 1.75rem !important;
  }

  /* Filter chips wrapping & touch padding */
  .filter-chip {
    font-size: 0.82rem !important;
    padding: 0.45rem 0.8rem !important;
    min-height: 38px !important;
  }

  .controls-meta-bar {
    flex-direction: column !important;
    align-items: stretch !important;
    gap: 0.75rem !important;
  }

  /* Article marquee card width fit on narrow displays */
  .article-carousel-card {
    width: calc(100vw - 2rem) !important;
    min-width: calc(100vw - 2rem) !important;
    max-width: calc(100vw - 2rem) !important;
    padding: 1.25rem 1rem !important;
  }

  /* Metric cards */
  .metric-card {
    padding: 1rem 0.85rem !important;
  }

  .metric-num {
    font-size: 1.75rem !important;
  }

  /* Footer work grid single column on narrow screens */
  .wg,
  .footer-work-row {
    grid-template-columns: 1fr !important;
    gap: 10px !important;
  }
}


/* Article Single-Column & Mobile-Friendly Architecture */
.single-column-article,
.article-single-column {
  max-width: 880px !important;
  margin-left: auto !important;
  margin-right: auto !important;
  width: 100% !important;
}

.table-responsive {
  width: 100% !important;
  max-width: 100% !important;
  overflow-x: auto !important;
  -webkit-overflow-scrolling: touch !important;
  margin: 1.25rem 0 !important;
}

.diagram-container {
  max-width: 100% !important;
  overflow-x: auto !important;
  -webkit-overflow-scrolling: touch !important;
}

.diagram-container svg {
  max-width: 100% !important;
  height: auto !important;
}

/* sync-highlight: Linked value highlighting in IDE/development, invisible on live production */
.sync-highlight {
  background: transparent !important;
  color: inherit !important;
  font-weight: inherit !important;
  padding: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  text-decoration: inherit !important;
  display: inline !important;
}

/* In IDE / Local Development Environment: 75% lighter gold highlight */
[data-env="ide"] .sync-highlight,
:root:not([data-env="production"]) .sync-highlight {
  background: rgba(251, 191, 36, 0.25) !important; /* 75% lighter gold */
  color: inherit !important;
  font-weight: inherit !important;
  padding: 0.05rem 0.25rem !important;
  border-radius: 3px !important;
  box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.35) !important;
  display: inline-block !important;
}

[data-env="production"] .sync-highlight {
  background: transparent !important;
  color: inherit !important;
  font-weight: inherit !important;
  padding: 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  display: inline !important;
}