/* tablet */
@media (max-width: 1024px) {
  .builds-grid { grid-template-columns: 1fr; }
  .grad-grid { grid-template-columns: 1fr; }
  .app-mock { grid-template-columns: 180px 1fr 240px; }
}

/* mobile */
@media (max-width: 900px) {
  .site-nav { padding: 16px 24px; }
  .site-nav-links { display: none; }
  .site-nav-cta { position: absolute; left: 50%; transform: translateX(-50%); }
  .site-nav-cta .btn.ghost { display: none; }
  .nav-toggle { display: block; }

  .hero { padding: 120px 24px 60px; }
  .hero h1 { font-size: clamp(36px, 8vw, 56px); }
  .hero-ctas { flex-direction: column; gap: 10px; }
  .hero-ctas .mono { margin-left: 0; margin-top: 4px; }
  .hero-shot { margin-top: 36px; }

  /* hero app mock: phone-shaped window */
  .hero-shot .shot-frame { aspect-ratio: 3/2; }
  .app-mock { grid-template-columns: 1fr; grid-template-rows: 36px 1fr; }
  .app-mock .app-side,
  .app-mock .app-right { display: none; }
  .mock-toast { display: none; }
  .app-mock .app-topbar { padding: 0 12px; font-size: 10px; }
  .app-mock .app-main { padding: 14px 16px; gap: 10px; }
  .app-main .tool-head h3 { font-size: 15px; }
  .app-main .tool-head .meta { font-size: 9px; }
  .app-main .form-grid { gap: 8px; }
  .app-main .field { padding: 7px 10px; }
  .app-main .field label { font-size: 9px; margin-bottom: 2px; }
  .app-main .field .val { font-size: 10px; }
  .mock-status { font-size: 10px; }
  .mock-table { margin-top: 2px; }
  .mt-head { padding: 6px 10px; }
  .mt-label, .mt-action { font-size: 9px; }
  .mock-table th { font-size: 8px; padding: 4px 8px; }
  .mock-table td { font-size: 10px; padding: 5px 8px; }
  .flag { font-size: 8px; padding: 1px 5px; }

  /* pinned story: switch to stacked scenes on mobile */
  .story { height: auto; }
  .story-stage { display: none; }
  .scene-fallback { display: block !important; }

  .scene-fallback .scene-inner {
    max-width: 1200px; margin: 0 auto;
    display: grid; grid-template-columns: 1fr; gap: 40px;
    align-items: center;
  }
  .scene-fallback { padding: 80px 24px; }
  .scene-fallback .scene-copy .eyebrow {
    font-family: 'JetBrains Mono', monospace; font-size: 11px;
    letter-spacing: 0.22em; text-transform: uppercase; color: var(--teal);
    display: flex; align-items: center; gap: 10px; margin-bottom: 22px;
  }
  .scene-fallback .scene-copy .eyebrow i {
    display: inline-block; width: 24px; height: 2px;
    background: var(--teal); border-radius: 2px;
  }
  .scene-fallback .scene-copy h2 {
    font-family: 'Inter'; font-weight: 300;
    font-size: clamp(30px, 6vw, 44px);
    line-height: 1.05; letter-spacing: -0.025em; color: var(--ink);
    max-width: 18ch; margin-bottom: 18px;
  }
  .scene-fallback .scene-copy h2 em { font-style: italic; color: var(--teal); font-weight: 400; }
  .scene-fallback .scene-copy p {
    font-size: 16px; color: var(--body); line-height: 1.55; max-width: 42ch;
  }
  .scene-fallback .scene-copy .link {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 14px; color: var(--teal); font-weight: 500; margin-top: 16px;
  }
  .scene-fallback .scene-shot {
    border-radius: 12px; border: 1px solid var(--line);
    background: #fff;
    position: relative; overflow: visible;
  }
  .scene-fallback .scene-shot .shot-tag {
    position: absolute; top: -10px; left: 12px;
    font-family: 'JetBrains Mono', monospace; font-size: 10px;
    color: var(--muted); letter-spacing: 0.14em; text-transform: uppercase;
    background: rgba(255,255,255,0.86); backdrop-filter: blur(6px);
    padding: 5px 9px; border-radius: 4px; z-index: 5;
  }

  /* scene fallback: all inner containers — override desktop height constraints */
  .scene-fallback .act-audit,
  .scene-fallback .act-scope,
  .scene-fallback .act-timeline,
  .scene-fallback .act-handoff { height: auto !important; }

  /* scene fallback: audit */
  .scene-fallback .act-audit { padding: 28px 20px 20px; }
  .scene-fallback .audit-head { padding-bottom: 10px; margin-bottom: 4px; }
  .scene-fallback .audit-label { font-size: 9px; }
  .scene-fallback .audit-status { font-size: 9px; }
  .scene-fallback .audit-row { gap: 8px; padding: 8px 0; font-size: 10px; }
  .scene-fallback .audit-idx { font-size: 9px; width: 16px; }
  .scene-fallback .audit-type { font-size: 10px; width: 70px; }
  .scene-fallback .audit-detail { font-size: 10px; }
  .scene-fallback .audit-row.highlight { margin: 0 -8px; padding: 8px 8px; }
  .scene-fallback .audit-foot { font-size: 10px; padding-top: 10px; }

  /* scene fallback: scope */
  .scene-fallback .act-scope { padding: 28px 24px 20px; margin: 0; font-size: 11px; border-left-width: 2px; }
  .scene-fallback .act-scope .h { font-size: 15px; }
  .scene-fallback .act-scope .small { font-size: 9px; }
  .scene-fallback .act-scope li { gap: 8px; padding: 2px 0; }
  .scene-fallback .act-scope li .k { font-size: 9px; width: 24px; }
  .scene-fallback .act-scope li .v { font-size: 11px; }

  /* scene fallback: timeline */
  .scene-fallback .act-timeline { padding: 28px 20px 20px; gap: 8px; }
  .scene-fallback .act-timeline .week { grid-template-columns: 46px 1fr; gap: 10px; }
  .scene-fallback .act-timeline .week .wk { font-size: 10px; }
  .scene-fallback .act-timeline .week .bar { height: 24px; font-size: 11px; padding: 0 10px; }

  /* scene fallback: handoff */
  .scene-fallback .act-handoff { padding: 16px; }
  .scene-fallback .act-handoff .doc-head { padding: 10px 12px; }
  .scene-fallback .act-handoff .doc-head .t { font-size: 12px; }
  .scene-fallback .act-handoff .doc-head .m { font-size: 9px; }
  .scene-fallback .act-handoff .doc-body { grid-template-columns: 1fr; gap: 10px; padding: 14px; }
  .scene-fallback .act-handoff .block { padding: 10px; }
  .scene-fallback .act-handoff .block h5 { font-size: 9px; }

  .builds-sec { padding: 80px 24px 60px; }
  .grad-sec { padding: 80px 24px 100px; }
  .tweets { padding: 80px 0 60px; overflow: hidden; }
  .tweets-intro { margin-bottom: 48px; padding: 0 24px; }

  .tweet-scatter {
    display: flex; flex-direction: row;
    overflow-x: auto; scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: 16px; padding: 0 24px;
    scrollbar-width: none;
  }
  .tweet-scatter::-webkit-scrollbar { display: none; }
  .tweet.t1, .tweet.t2, .tweet.t3, .tweet.t4 {
    margin-top: 0; grid-column: auto; grid-row: auto;
    flex: 0 0 85vw; scroll-snap-align: center;
  }
  .tweet .body { font-size: 20px; }
  .tweet.big .body { font-size: 20px; }

  .contact-sec { padding: 80px 24px; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .final { padding: 100px 24px 120px; }
  .site-foot {
    padding: 28px 24px;
    flex-direction: column; gap: 16px; text-align: center;
  }
}

@media (max-width: 600px) {
  .hero h1 { font-size: clamp(32px, 10vw, 48px); max-width: 100%; }
  .hero-sub { font-size: 16px; }
  .hero-shot .shot-frame { aspect-ratio: 4/3; }
  .app-main .form-grid { grid-template-columns: 1fr; }
  .build-card { padding: 20px; }
  .bc-stats { flex-direction: column; gap: 10px; }

  /* radio cards: uniform size on small screens */
  .radio-cards.pills { gap: 6px; }
  .radio-card { font-size: 13px; }
  .radio-cards.pills .radio-card { padding: 8px 14px; }

  /* form arrow center on mobile */
  .form-arrow { align-self: center; }
}