/* ============================================================
   RESPONSIVE — mobile vertical fallback
   ============================================================ */
@media (max-width: 860px){
  body{ overflow:auto; }
  .deck{
    flex-direction: column;
    overflow-x: hidden; overflow-y: auto;
    height: auto;
    scroll-snap-type: y proximity;
  }
  .panel{
    flex: none; width:100%; height:auto; min-height: 100dvh;
    scroll-snap-align: start; scroll-snap-stop: normal;
    padding-top: calc(var(--pad-y) + 56px);
    padding-bottom: calc(var(--pad-y) + 30px);
  }
  .cols, .fronts{ grid-template-columns: 1fr; }
  .smap{ grid-template-columns: 1fr; }
  .costs{ grid-template-columns: 1fr; }
  .steps{ grid-template-columns: 1fr; gap: 22px; }
  .step::before{ display:none; }
  .nav-btn{ width:40px; height:40px; }
  .rail-label{ display:none; }
  .seg .seg-label{ display:none; }
  .topbar{ background: color-mix(in oklab, var(--paper) 88%, transparent); backdrop-filter: blur(8px); }

  /* timeline stacks vertically */
  .evo-spine{ display:none; }
  .evo-grid{ grid-template-columns: 1fr; gap: 0; }
  .evo-col{ grid-template-rows: none; grid-template-columns: 22px 1fr; align-items:start; padding: 16px 0; border-left: none; position:relative; }
  .evo-col::before{ content:""; position:absolute; left:6px; top:0; bottom:0; width:2px; background:var(--line-2); }
  .evo-col:first-child::before{ top:50%; }
  .evo-col:last-child::before{ bottom:50%; }
  .evo-col .e-dot{ grid-row:auto; grid-column:1; align-self:start; margin-top:4px; justify-self:start; }
  .e-tool, .e-skill{ grid-column:2; text-align:left; padding:0; }
  .e-tool{ grid-row:auto; align-self:auto; margin-bottom:8px; }
  .e-tool::after{ display:none; }
  .e-skill{ grid-row:auto; align-self:auto; }
  .e-skill::before{ display:none; }

  .flow-row{ grid-template-columns: 1fr; gap:8px; text-align:left; }
  .eras{ grid-template-columns: 1fr; gap: 0; }
  .tl6-axis{ display:none; }
  .tl6-grid, .tl6-grid.cols7, .tl6-grid.cols8{ grid-template-columns: 1fr; gap:0; }
  .tl6-col{ grid-template-rows:none; grid-template-columns: 22px 1fr; column-gap:14px; align-items:start; padding:16px 0; border-bottom:1px solid var(--line); position:relative; }
  .tl6-col:last-child{ border-bottom:0; }
  .tl6-when{ grid-column:2; text-align:left; align-self:auto; margin-bottom:4px; }
  .tl6-node{ grid-column:1; grid-row:1; align-self:start; margin-top:4px; }
  .tl6-card{ grid-column:2; padding-top:0; text-align:left; }
  .tl6-tag{ margin-bottom:6px; }
  .eras::before{ display:none; }
  .era{ grid-template-rows:none; justify-items:start; text-align:left; grid-auto-flow:row; padding: 18px 0; border-bottom:1px solid var(--line); position:relative; }
  .era:last-child{ border-bottom:0; }
  .era .era-dot{ margin:8px 0; }
  .era .era-name{ margin-top:0; }
  .era .era-role{ margin-left:0; text-align:left; max-width:none; }
  .trow{ grid-template-columns: 1fr; gap:6px; }
  .trow .t-name{ white-space:normal; }
  .pmx-head, .pm-row{ grid-template-columns: 1fr; gap:6px; }
  .pmx-head{ display:none; }
  .pm-row{ padding:14px 0; }
  .pm-cat{ color:var(--ink); font-weight:600; margin-bottom:4px; }
  .panel.has-sub{ display:block; overflow:visible; height:auto; scroll-snap-type:none; }
  .leaf{ height:auto; min-height:100dvh; scroll-snap-align:start; }
  .subcue{ display:none; }
  .priceg{ grid-template-columns:1fr; }
  .featrow{ grid-template-columns:1fr; gap:8px; }
  .feat-cards{ grid-template-columns:1fr 1fr; }
  .ccwrap{ grid-template-columns:1fr; gap:18px; }
  .cue-chev{ font-size:.82em; }
  .cuerow{ flex-direction:column; }
  .flow-row .arrow{ display:none; }
  .flow-row .f-cost{ text-align:left; }
  h1.display{ font-size: clamp(30px, 10vw, 64px); overflow-wrap:break-word; }
  .kicker-num{ font-size: clamp(34px, 11vw, 72px); overflow-wrap:break-word; }
  .kicker-num .ph{ white-space:normal; }
  .pullquote{ font-size: clamp(18px, 5vw, 26px); }
  .ttable, .ttable thead, .ttable tbody, .ttable tr, .ttable th, .ttable td{ display:block; }
  .ttable thead{ display:none; }
  .ttable tr{ border:1px solid var(--line); border-radius:10px; padding:14px; margin-bottom:14px; }
  .ttable td{ border:0; padding:6px 0; display:flex; justify-content:space-between; align-items:center; gap:14px; }
  .ttable td::before{ content: attr(data-label); font-family:var(--mono); font-size:11px; letter-spacing:.06em; text-transform:uppercase; color:var(--muted); }
  .ttable td.opt::before{ display:none; }
  .ttable td.opt{ display:block; }
}

@media (prefers-reduced-motion: reduce){
  .deck{ scroll-behavior:auto; }
  .panel .anim{ transition:none; opacity:1; transform:none; }
}

/* ============================================================
   PRINT — each panel = one A4 landscape page
   ============================================================ */
@media print{
  @page{ size: A4 landscape; margin: 12mm 14mm; }
  html, body{ overflow:visible; height:auto; background:#fff; }
  :root{ --pad-x: 0; --pad-y: 0; }
  .topbar, .deckrail{ display:none !important; }
  .deck{ display:block; height:auto; overflow:visible; }
  .panel{
    page-break-after: always; break-after: page;
    width:100%; height: auto; min-height: 0;
    display:flex; justify-content:flex-start;
    padding: 4mm 0; transform:none;
  }
  .panel:last-child{ page-break-after: avoid; }
  .panel .anim{ opacity:1 !important; transform:none !important; transition:none !important; }
  .panel-inner{ max-width:none; }
  .panel-foot{ position: static; margin-top: 8mm; left:0; right:0; }
  .hero-spine{ position:static; margin-top:8mm; }
  h1.display{ font-size: 48pt; }
  h2.title{ font-size: 26pt; }
  .lead{ font-size: 13pt; } .body{ font-size: 11.5pt; }
  .kicker-num{ font-size: 60pt; }
  *{ -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}
/* ============================================================
   TWEAKS PANEL (hidden unless host enables Tweaks)
   ============================================================ */
.tweaks{
  position:fixed; top:64px; right: clamp(16px,2vw,28px); z-index:200;
  width: 300px; max-width: calc(100vw - 32px);
  background: var(--paper);
  border:1px solid var(--line-2); border-radius:12px;
  box-shadow: 0 18px 48px -18px oklch(0.3 0.02 60 / .35), 0 2px 8px oklch(0.3 0.02 60 / .12);
  font-family: var(--sans);
  overflow:hidden;
}
.tweaks[hidden]{ display:none; }
.tw-head{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 16px; border-bottom:1px solid var(--line);
}
.tw-head span{ font-family:var(--mono); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--ink); }
.tw-close{
  border:0; background:none; cursor:pointer; color:var(--muted);
  font-size:15px; line-height:1; padding:4px; border-radius:6px;
}
.tw-close:hover{ color:var(--accent); }
.tw-body{ padding: 16px; display:grid; gap: 20px; max-height: 70vh; overflow-y:auto; }
.tw-group{ display:grid; gap:9px; }
.tw-label{ font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--accent-deep); }
.tw-opts{ display:grid; gap:7px; }
.tw-opt{
  display:flex; align-items:baseline; justify-content:space-between; gap:10px;
  text-align:left; cursor:pointer;
  border:1px solid var(--line-2); border-radius:8px;
  padding: 9px 12px; background: var(--paper);
  color: var(--ink); font-size: 17px; line-height:1.1;
  transition: border-color .15s, background .15s;
}
.tw-opt .tw-sub{ font-family:var(--mono); font-size:10px; letter-spacing:.06em; text-transform:uppercase; color:var(--faint); flex:0 0 auto; }
.tw-opt:hover{ border-color: var(--faint); }
.tw-opt.is-on{ border-color: var(--accent); background: var(--accent-tint); }
.tw-opt.is-on .tw-sub{ color: var(--accent-deep); }
@media print{ .tweaks{ display:none !important; } }