/* ==========================================================
   ARCADIA v7_12 — MOBILE HUMAN-OPTIMIZED OVERLAY
   Baseline: v7_11 = v7_6 true source + local descender-safe fix.
   Purpose: improve mobile readability, touch flow, section rhythm,
   and navigation without changing the v7_6 color system, logo path,
   hero image path, styles.css visual language, Worker/D1, Approval
   Queue, Operational Continuity, or approval-gated operations.
   ========================================================== */

/* Global mobile safety: prevent horizontal drift from long headings,
   button rows, media, and card grids. */
html,
body {
  max-width: 100%;
  overflow-x: clip;
}

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

/* Mobile-first refinement begins at tablet/phone width. */
@media (max-width: 820px) {
  .wrap {
    width: min(100% - 2rem, var(--wrap, 1120px));
  }

  .section {
    padding-top: clamp(3.1rem, 9vw, 4.6rem) !important;
    padding-bottom: clamp(3.1rem, 9vw, 4.6rem) !important;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .header-inner {
    display: grid !important;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: .75rem;
    min-width: 0;
  }

  .brand-logo {
    width: clamp(64px, 18vw, 86px) !important;
    height: clamp(64px, 18vw, 86px) !important;
  }

  nav[aria-label="Primary navigation"] {
    display: flex !important;
    justify-content: flex-start !important;
    align-items: center;
    gap: .55rem !important;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: .25rem 0 .35rem;
    min-width: 0;
  }

  nav[aria-label="Primary navigation"]::-webkit-scrollbar {
    display: none;
  }

  nav[aria-label="Primary navigation"] a {
    flex: 0 0 auto;
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: .62rem .82rem !important;
    white-space: nowrap;
    line-height: 1.1;
  }

  .hero {
    padding-top: clamp(2.7rem, 8vw, 4.2rem) !important;
  }

  .hero-grid,
  .hero-sales-grid,
  .two-col,
  .split-paths,
  .observation-sales-grid,
  .cards,
  .four,
  .premium-flow,
  .uno-benefits-grid,
  .telepresence-points,
  .session-meta,
  .infrastructure-grid,
  .request-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: clamp(1rem, 4vw, 1.45rem) !important;
  }

  h1,
  h2,
  .request-title {
    max-width: 100%;
    text-wrap: balance;
    overflow-wrap: normal;
    word-break: normal;
    hyphens: none;
  }

  h1 {
    font-size: clamp(2.35rem, 10vw, 4.15rem) !important;
    line-height: 1.02 !important;
    letter-spacing: -0.045em;
  }

  h2,
  .request-title {
    font-size: clamp(1.9rem, 7.9vw, 3.05rem) !important;
    line-height: 1.08 !important;
    letter-spacing: -0.035em;
  }

  h3 {
    font-size: clamp(1.18rem, 4.9vw, 1.55rem) !important;
    line-height: 1.16 !important;
  }

  p,
  li,
  .byline,
  .lead-problem,
  .hero-subline {
    font-size: clamp(1rem, 4.1vw, 1.13rem) !important;
    line-height: 1.58 !important;
  }

  .eyebrow {
    font-size: .78rem !important;
    letter-spacing: .13em !important;
    line-height: 1.35 !important;
  }

  .hero-title-accent {
    display: inline-block;
    font-size: .34em !important;
    letter-spacing: .075em !important;
    line-height: 1.18 !important;
    margin-top: .45rem;
    margin-bottom: .15rem;
  }

  .hero-subline,
  .section-intro,
  .premium-copy-card,
  .executive-copy-card,
  .luminous-card,
  .path-card,
  .card,
  .session-value-card,
  .arcadia-promise-card,
  .hero-decision-card {
    max-width: 100%;
  }

  .hero-photo-card,
  .screen-image-card {
    margin-left: auto;
    margin-right: auto;
    width: 100%;
  }

  .hero-photo-card img,
  .screen-image-card img {
    width: 100%;
    display: block;
  }

  .caption-stack {
    font-size: .94rem !important;
    line-height: 1.45 !important;
  }

  .button-row {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: .75rem !important;
    width: 100%;
  }

  .button,
  a.button,
  button.button {
    width: 100%;
    min-height: 48px;
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    text-align: center;
    line-height: 1.18 !important;
    padding: .9rem 1rem !important;
  }

  .hero-benefit-list,
  .executive-list {
    padding-left: 1.15rem;
  }

  .hero-benefit-list li,
  .executive-list li {
    margin-bottom: .72rem;
  }

  .line-stack span {
    display: block;
  }

  /* Preserve the successful v7_11 descender fix on mobile too. */
  #workstation .workstation-title .descender-safe-line,
  #availability .availability-title .descender-safe-line,
  #infrastructure .infrastructure-title .descender-safe-line,
  #request .request-title .descender-safe-line {
    line-height: 1.22 !important;
    padding-bottom: 0.18em !important;
    margin-bottom: -0.02em !important;
    overflow: visible !important;
  }

  #request .request-title .request-review-line {
    white-space: normal !important;
  }
}

/* Narrow phone polish. */
@media (max-width: 520px) {
  .wrap {
    width: min(100% - 1.35rem, var(--wrap, 1120px));
  }

  .site-header {
    padding-top: .35rem;
    padding-bottom: .35rem;
  }

  .header-inner {
    gap: .45rem;
  }

  nav[aria-label="Primary navigation"] a {
    font-size: .86rem !important;
    padding: .58rem .72rem !important;
  }

  h1 {
    font-size: clamp(2.08rem, 11.6vw, 3.15rem) !important;
  }

  h2,
  .request-title {
    font-size: clamp(1.72rem, 9.4vw, 2.55rem) !important;
  }

  .hero-title-accent {
    font-size: .31em !important;
    letter-spacing: .065em !important;
  }

  .hero-benefit-title span {
    margin-bottom: .08rem;
  }

  .hero-decision-card,
  .arcadia-promise-card,
  .premium-copy-card,
  .executive-copy-card,
  .luminous-card,
  .path-card,
  .card,
  .session-value-card {
    padding: clamp(1rem, 5vw, 1.35rem) !important;
  }

  .num {
    display: inline-block;
    margin-bottom: .35rem;
  }
}