/* Animated introduction. Normal page flow; no fixed overlay. */
.intro { padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(2.5rem, 6vw, 4.5rem); }
.intro-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: clamp(1.5rem, 4vw, 2.5rem); }
.intro-notice {
  margin: 0; font: 600 .78rem/1.3 var(--sans); letter-spacing: .06em; text-transform: uppercase;
  color: var(--terra-text); border: 1px solid var(--terra-text); border-radius: 999px; padding: .45rem .9rem;
}
.intro-links { display: flex; align-items: center; gap: 1.25rem; }
.intro-links .btn { text-decoration: none; }
.skip-intro { font-size: .95rem; color: var(--ink); }
.intro-title { font-size: clamp(1.75rem, 3.6vw, 2.75rem); max-width: 30ch; margin-bottom: clamp(1.25rem, 3vw, 2rem); }
.intro-question { font-family: var(--serif); font-size: clamp(1.25rem, 2.6vw, 1.65rem); line-height: 1.35; max-width: 34ch; margin: 2rem 0 .75rem; }
.intro-fine { max-width: 46rem; }
.intro-text { margin-top: 1.5rem; }
.intro-text ol { margin: 0; padding-left: 1.25rem; max-width: 46rem; }
.intro-text li { margin-bottom: .5rem; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

/* ---------- player ---------- */
.player { border-radius: 10px; background: var(--paper); border: 1px solid var(--ink); padding: clamp(.75rem, 2vw, 1.25rem); }
.player:focus-visible { outline: 3px solid var(--ink); outline-offset: 4px; }
.stage { display: grid; }
.scene { grid-area: 1 / 1; margin: 0; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(1rem, 3vw, 2.5rem); align-items: center; }
.scene svg { width: 100%; }
.scene figcaption { padding-right: .5rem; }
.scene .line { font-family: var(--serif); font-size: clamp(1.45rem, 3vw, 2.15rem); line-height: 1.2; margin: 0 0 .9rem; max-width: 18ch; }
.scene .sub { font-size: 1rem; color: var(--ink-2); margin: 0; max-width: 30ch; }
@media (max-width: 760px) {
  .scene { grid-template-columns: 1fr; gap: .75rem; }
  .scene .line { max-width: none; }
  .scene .sub { max-width: none; }
}

/* JavaScript on: one scene at a time, cross-fading. Without it, all scenes stay visible and stacked. */
.js .scene { opacity: 0; visibility: hidden; transition: opacity .7s ease, visibility 0s linear .7s; }
.js .scene.active { opacity: 1; visibility: visible; transition: opacity .7s ease; }
.no-js .stage { gap: 2.5rem; }
.no-js .scene { grid-area: auto; }
.no-js .pcontrols { display: none; }

/* ---------- controls ---------- */
.pcontrols { display: flex; align-items: center; gap: .5rem; margin-top: 1rem; flex-wrap: wrap; }
.pbtn {
  font: 600 .9rem/1 var(--sans); background: var(--paper); color: var(--ink); border: 1px solid var(--ink);
  border-radius: 999px; min-width: 2.75rem; height: 2.75rem; padding: 0 1rem; cursor: pointer;
}
.pbtn[data-act="prev"], .pbtn[data-act="next"] { font-size: 1.35rem; padding: 0; }
.pbtn:hover { background: var(--ink); color: var(--paper); }
.pbtn:disabled { opacity: .35; cursor: default; background: var(--paper); color: var(--ink); }
.pbtn.play { min-width: 5.5rem; }
.segments { display: flex; gap: .35rem; flex: 1 1 10rem; min-width: 8rem; }
.seg { flex: 1; height: 2.75rem; background: none; border: 0; padding: 0; cursor: pointer; display: flex; align-items: center; }
.seg span { display: block; width: 100%; height: 4px; border-radius: 2px; background: var(--line); overflow: hidden; }
.seg span i { display: block; height: 100%; width: 0; background: var(--ink); }
.seg.done span i { width: 100%; }
.seg.active span i { width: 100%; }
.player.motion .seg.active span i { width: 0; animation: segfill var(--dur, 5000ms) linear forwards; }
@keyframes segfill { to { width: 100%; } }
.reduced .pbtn.play, .reduced .pbtn.replay { display: none; }

/* ---------- scene motion (only with motion allowed and JavaScript running) ---------- */
@media (prefers-reduced-motion: no-preference) {
  .player.motion .scene.active .i1-page { animation: flyin 1.3s cubic-bezier(.3,.7,.3,1) .3s both; }
  .player.motion .scene.active .a-reach { transform-box: fill-box; transform-origin: 0 50%; animation: reach 1.3s ease .3s both; }
  .player.motion .scene.active .i1-link { stroke-dasharray: 120; animation: drawline .7s ease var(--d) both; }
  .player.motion .scene.active .pop { transform-box: fill-box; transform-origin: 50% 50%; animation: pop .55s cubic-bezier(.3,1.5,.5,1) var(--d, 0s) both; }
  .player.motion .scene.active .drop { animation: drop .8s cubic-bezier(.3,.8,.3,1) var(--d, 0s) both; }
  .player.motion .scene.active .look-right { transform-box: fill-box; transform-origin: 50% 100%; animation: lookr 1.2s ease 2.8s both; }
  .player.motion .scene.active .look-both { transform-box: fill-box; transform-origin: 50% 100%; animation: lookboth 3.6s ease 1.2s both; }
  .player.motion .scene.active .client .s:last-child { transform-box: fill-box; transform-origin: 100% 50%; animation: gesture 1s ease .4s both; }
  .player.motion .scene.active .draw-on { stroke-dasharray: var(--len, 150); animation: drawlen .8s ease var(--d) both; }
  .player.motion .scene.active .fade { animation: fade .6s ease var(--d, 0s) both; }
  .player.motion .scene.active .flag { transform-box: fill-box; transform-origin: 0 100%; animation: raise .7s cubic-bezier(.3,1.4,.5,1) var(--d) both; }
  .player.motion .scene.active .scan { animation: scan 3s ease-in-out .4s both; }
  .player.motion .scene.active .reviewer { transform-box: fill-box; transform-origin: 50% 100%; animation: lean 3s ease-in-out .4s both; }
  .player.motion .scene.active .dots circle { transform-box: fill-box; transform-origin: 50% 50%; animation: pop .4s cubic-bezier(.3,1.5,.5,1) var(--d) both; }
  .player.is-paused .scene *, .player.is-paused .seg span i { animation-play-state: paused !important; }
}
@keyframes flyin { from { transform: translate(260px, -90px) rotate(14deg); opacity: 0; } 30% { opacity: 1; } to { transform: none; } }
@keyframes reach { from { transform: scaleX(.55); } to { transform: none; } }
@keyframes drawline { from { stroke-dashoffset: 120; } to { stroke-dashoffset: 0; } }
@keyframes drawlen { from { stroke-dashoffset: var(--len, 150); } to { stroke-dashoffset: 0; } }
@keyframes pop { from { transform: scale(0); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes drop { from { transform: translateY(-150px) rotate(-6deg); opacity: 0; } to { transform: none; opacity: 1; } }
@keyframes lookr { 0% { transform: none; } 100% { transform: rotate(10deg); } }
@keyframes lookboth { 0%, 100% { transform: none; } 20%, 38% { transform: rotate(-14deg); } 58%, 76% { transform: rotate(14deg); } }
@keyframes gesture { 0% { transform: rotate(18deg); } 50% { transform: rotate(-8deg); } 100% { transform: none; } }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes raise { from { transform: scaleY(0); } to { transform: none; } }
@keyframes scan { 0% { transform: translate(-70px, -20px); } 45% { transform: translate(-10px, 60px); } 100% { transform: translate(40px, 0); } }
@keyframes lean { 0%, 100% { transform: none; } 50% { transform: rotate(-6deg); } }

.player .scene.settled * { animation: none !important; }
.player.first .scene { transition: none; }