/* Semantic layer case study: chapter visuals and the "map a domain" piece.
   Builds on case-study.css; accent colors come from .cs.t-ink. */

/* ---- hub (hero) and ripple (ch 7): one thing in the middle, tied to everything ---- */
.hub{height:340px}
.hb-lines{position:absolute;inset:0;width:100%;height:100%}
.hb-lines line{
  stroke:var(--sage);stroke-opacity:.45;stroke-width:1.5;vector-effect:non-scaling-stroke;
  stroke-dasharray:4 6;animation:hb-flow 1.4s linear infinite;
}
@keyframes hb-flow{to{stroke-dashoffset:-20}}
.hb-core{
  position:absolute;left:50%;top:52%;transform:translate(-50%,-50%);z-index:2;
  display:flex;flex-direction:column;align-items:center;gap:3px;padding:16px 22px;border-radius:999px;
  background:var(--ink);box-shadow:0 14px 34px -14px rgba(23,23,21,.45);
}
.hb-core span{font-size:15px;font-weight:500;color:#f6f5f1;white-space:nowrap}
.hb-core small{font-family:"JetBrains Mono",monospace;font-size:10px;color:#b9c3da}
.hb-nodes{list-style:none;margin:0;padding:0}
.hb-nodes li{
  position:absolute;transform:translate(-50%,-50%);z-index:2;white-space:nowrap;
  padding:8px 12px;border-radius:11px;background:#fbfaf6;color:var(--ink);
  font-family:"JetBrains Mono",monospace;font-size:11.5px;box-shadow:0 8px 22px -14px rgba(23,23,21,.35);
  animation:hb-light 7.2s ease-in-out infinite;animation-delay:calc(var(--i,0) * .9s);
}
.hb-nodes .n1{left:18%;top:20%} .hb-nodes .n2{left:82%;top:20%}
.hb-nodes .n3{left:13%;top:56%} .hb-nodes .n4{left:87%;top:56%}
.hb-nodes .n5{left:24%;top:86%} .hb-nodes .n6{left:76%;top:86%}
@keyframes hb-light{
  0%,18%,100%{box-shadow:0 8px 22px -14px rgba(23,23,21,.35);color:var(--ink)}
  6%,12%{box-shadow:0 0 0 5px rgba(93,113,150,.25),0 8px 22px -14px rgba(23,23,21,.35);color:var(--sage-d)}
}
.hub figcaption{left:50% !important;transform:translateX(-50%);white-space:nowrap}

/* ripple: a change goes out from the middle and lights everything at once */
.ripple .hb-lines line{animation:none;stroke-dasharray:none;stroke-opacity:.25}
.rp-ring{
  position:absolute;left:50%;top:52%;width:140px;height:140px;margin:-70px 0 0 -70px;border-radius:50%;
  border:1.5px solid var(--sage);opacity:0;animation:rp-out 3.6s ease-out infinite;
}
.rp-ring.r2{animation-delay:1.8s}
@keyframes rp-out{0%{transform:scale(.4);opacity:.8} 100%{transform:scale(3.2);opacity:0}}
.ripple .hb-nodes li{animation:rp-hit 3.6s ease-out infinite;animation-delay:calc(.5s + var(--i,0) * .05s)}
.ripple .hb-nodes li.bell{background:var(--amber-bg);color:var(--amber)}
@keyframes rp-hit{
  0%,100%{box-shadow:0 8px 22px -14px rgba(23,23,21,.35)}
  12%{box-shadow:0 0 0 5px rgba(93,113,150,.28),0 8px 22px -14px rgba(23,23,21,.35)}
}

/* ---- ch 1: one area, five names ---- */
.names .nm-core{
  position:absolute;left:50%;top:47%;transform:translate(-50%,-50%);z-index:2;
  padding:16px 20px;border-radius:16px;background:var(--ink);color:#f6f5f1;font-size:15px;font-weight:500;
}
.names ul{list-style:none;margin:0;padding:0}
.names li{
  position:absolute;transform:translate(-50%,-50%);display:flex;flex-direction:column;gap:2px;
  padding:9px 12px;border-radius:12px;background:#fbfaf6;font-size:13px;color:var(--ink);white-space:nowrap;
  box-shadow:0 8px 22px -14px rgba(23,23,21,.35);transition:opacity .45s,transform .45s;transition-delay:calc(.2s + var(--i,0) * .35s);
}
.names li small{font-family:"JetBrains Mono",monospace;font-size:9.5px;color:var(--mute)}
.names li code{font-family:"JetBrains Mono",monospace;font-size:12px}
.names .t1{left:21%;top:20%} .names .t2{left:79%;top:20%}
.names .t3{left:17%;top:72%} .names .t4{left:83%;top:72%} .names .t5{left:50%;top:84%}
.js .names:not(.in) li{opacity:0;transform:translate(-50%,-30%)}

/* ---- ch 2: what an agent needs and doesn't have ---- */
.needs{display:flex;flex-direction:column;justify-content:center;gap:16px;padding:26px 30px}
.nd-agent{display:flex;flex-direction:column;gap:3px;align-self:flex-start;padding:12px 16px;border-radius:14px;background:var(--ink)}
.nd-agent small{font-family:"JetBrains Mono",monospace;font-size:10px;color:#b9c3da}
.nd-agent b{font-size:16px;font-weight:500;color:#f6f5f1}
.needs ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.needs li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;border-radius:12px;
  background:#fbfaf6;font-size:14px;color:var(--soft);transition:opacity .4s,transform .4s;transition-delay:calc(.3s + var(--i,0) * .25s);
}
.needs li i{
  display:grid;place-items:center;flex:0 0 22px;height:22px;border-radius:50%;font-style:normal;font-size:12px;font-weight:600;
  background:var(--amber-bg);color:var(--amber);animation:nd-ask 2.4s ease-in-out infinite;animation-delay:calc(var(--i,0) * .3s);
}
@keyframes nd-ask{50%{transform:scale(1.18)}}
.js .needs:not(.in) li{opacity:0;transform:translateX(10px)}

/* ---- ch 3: everyone pulls to the middle, then one shared map ---- */
.tg-center{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.8);z-index:1;opacity:0;
  display:grid;place-items:center;width:128px;height:128px;border-radius:50%;
  background:var(--ink);color:#f6f5f1;font-size:15px;font-weight:500;text-align:center;
  animation:tg-center 9s ease-in-out infinite;
}
.tg-node{
  position:absolute;z-index:2;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:10px 14px;border-radius:12px;background:#fbfaf6;font-size:14px;font-weight:500;color:var(--ink);
  box-shadow:0 8px 22px -14px rgba(23,23,21,.35);
}
.tg-node small{font-family:"JetBrains Mono",monospace;font-size:9.5px;font-weight:400;color:var(--mute)}
.tg-node.a{animation:tg-a 9s ease-in-out infinite}
.tg-node.b{animation:tg-b 9s ease-in-out infinite}
.tg-node.c{animation:tg-c 9s ease-in-out infinite}
@keyframes tg-center{0%,42%{opacity:0;transform:translate(-50%,-50%) scale(.8)} 52%,92%{opacity:1;transform:translate(-50%,-50%) scale(1)} 100%{opacity:0;transform:translate(-50%,-50%) scale(.8)}}
@keyframes tg-a{0%,8%{left:16%;top:22%} 24%,32%{left:44%;top:46%} 42%{left:16%;top:22%} 60%,92%{left:21%;top:20%} 100%{left:16%;top:22%}}
@keyframes tg-b{0%,12%{left:84%;top:22%} 28%,34%{left:56%;top:46%} 42%{left:84%;top:22%} 62%,92%{left:79%;top:20%} 100%{left:84%;top:22%}}
@keyframes tg-c{0%,16%{left:50%;top:86%} 30%,36%{left:50%;top:58%} 42%{left:50%;top:86%} 64%,92%{left:50%;top:88%} 100%{left:50%;top:86%}}

/* ---- ch 4: the two spines ---- */
.spines{display:flex;flex-direction:column;justify-content:center;gap:28px;padding:30px 32px}
.sp-row p{margin:0 0 8px;font-size:14px;color:var(--ink);font-weight:500}
.sp-row small{display:block;margin-top:7px;font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute)}
.sp-row small b{color:var(--amber);font-weight:500}
.sp-bar{display:flex;height:18px;border-radius:9px;background:rgba(23,23,21,.07);overflow:hidden}
.sp-bar i{display:block;height:100%;width:0;transition:width 1.4s cubic-bezier(.5,0,.2,1)}
.sp-bar .bad{background:#d99a55}
.sp-bar .ok{background:var(--sage)}
.spines.in .first .bad{width:70%;transition-delay:.3s}
.spines.in .first .ok{width:30%;transition-delay:1.6s}
.spines.in .flip .ok{width:100%;transition-delay:2.6s}

/* ---- ch 5: map a domain ---- */
.sm{padding:28px;border-radius:24px;background:var(--card);box-shadow:inset 0 0 0 1px var(--line),0 30px 60px -40px rgba(23,23,21,.35)}
.sm-top{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px}
.sm-label{margin:0;flex:1 1 100%;font-size:14px;color:var(--soft)}
.sm-pick{display:flex;flex-wrap:wrap;gap:6px}
.sm-pick button{
  font:inherit;font-size:14px;padding:9px 16px;border-radius:999px;cursor:pointer;
  border:1px solid rgba(23,23,21,.16);background:#fff;color:var(--soft);transition:border-color .2s,background .2s,color .2s;
}
.sm-pick button:hover{border-color:rgba(23,23,21,.4);color:var(--ink)}
.sm-pick button[aria-pressed="true"]{background:var(--tint);border-color:var(--sage);color:var(--sage-d)}
.sm-pick button:focus-visible{outline:2px solid var(--sage);outline-offset:2px}
.sm-top .cs-btn{margin-left:auto}

.sm-steps{list-style:none;margin:20px 0 0;padding:0;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px}
.sm-step{
  grid-column:span 2;display:flex;flex-direction:column;min-width:0;padding:16px;border-radius:16px;background:#fbfaf6;
  box-shadow:inset 0 0 0 1px var(--line);opacity:.45;transition:opacity .4s,box-shadow .4s;
}
.sm-step[data-step="second"]{grid-column:span 2}
.sm-step[data-step="publish"]{grid-column:span 4}
.sm-step.on{opacity:1;box-shadow:inset 0 0 0 1px rgba(93,113,150,.4)}
.sm-step h3{margin:0;display:flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--ink)}
.sm-step h3 b{
  display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;
  font-family:"JetBrains Mono",monospace;font-size:11px;font-weight:400;background:var(--ink);color:#f6f5f1;
}
.sm-count{margin-left:auto;font-family:"JetBrains Mono",monospace;font-size:11px;font-weight:400;color:var(--sage-d)}
.sm-step > p{margin:4px 0 12px;font-size:12.5px;line-height:1.4;color:var(--mute)}
.sm-out{display:flex;flex-wrap:wrap;gap:5px;align-content:flex-start;min-height:52px}
.sm-chip{
  display:inline-block;padding:3px 7px;border-radius:6px;font-family:"JetBrains Mono",monospace;font-size:11px;line-height:1.4;
  background:rgba(23,23,21,.05);color:var(--soft);opacity:0;transform:translateY(3px);animation:gc-pop .3s ease forwards;
}
.sm-chip.term{background:var(--tint);color:var(--sage-d)}
.sm-chip.in{background:var(--tint);color:var(--sage-d)}
.sm-chip.rel{background:rgba(23,23,21,.06);color:var(--soft)}
.sm-chip.drop{background:transparent;color:var(--mute);text-decoration:line-through;box-shadow:inset 0 0 0 1px var(--line)}
.sm-chip.new{background:var(--ink);color:#f6f5f1}
.sm-chip.gap{background:var(--amber-bg);color:var(--amber)}

.sm-sort{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.sm-col{display:flex;flex-direction:column;gap:5px;align-items:flex-start;min-width:0}
.sm-col > small{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--mute);margin-bottom:2px}
.sm-col .sm-chip{max-width:100%;overflow-wrap:anywhere}
.sm-note{flex:1 1 100%;margin:6px 0 0;font-size:12px;line-height:1.45;color:var(--mute)}

.sm-map{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;align-items:baseline;width:100%;opacity:0;animation:gc-pop .4s ease forwards}
.sm-map > b{grid-column:1 / -1;font-size:17px;font-weight:500;color:var(--ink)}
.sm-map > span{font-family:"JetBrains Mono",monospace;font-size:10.5px;color:var(--mute)}
.sm-map > div{display:flex;flex-wrap:wrap;gap:5px}
.sm-rel{font-family:"JetBrains Mono",monospace;font-size:11px;padding:3px 7px;border-radius:6px;background:var(--tint-2);color:var(--sage-d)}
.sm-rel em{font-style:normal;color:var(--mute)}
.sm-fine{margin:14px 0 0;font-family:"JetBrains Mono",monospace;font-size:11px;color:var(--mute)}

/* ---- ch 6: confirmed ---- */
.stamps{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:22px;padding:28px}
.st-maps{position:relative;height:200px}
.st-map{
  position:absolute;left:0;right:0;display:flex;flex-direction:column;gap:3px;padding:16px 18px;border-radius:16px;
  background:#fbfaf6;box-shadow:0 12px 30px -16px rgba(23,23,21,.35);transition:opacity .5s,transform .5s;transition-delay:calc(var(--i,0) * .25s);
}
.st-map:nth-child(1){top:0;z-index:3} .st-map:nth-child(2){top:62px;z-index:2;left:14px;right:-14px} .st-map:nth-child(3){top:124px;z-index:1;left:28px;right:-28px}
.st-map small{font-family:"JetBrains Mono",monospace;font-size:10px;color:var(--mute)}
.st-map b{font-size:16px;font-weight:500;color:var(--ink)}
.js .stamps:not(.in) .st-map{opacity:0;transform:translateY(8px)}
.st-checks{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.st-checks li{
  display:flex;align-items:center;gap:10px;font-size:14px;color:var(--soft);
  transition:opacity .4s,transform .4s;transition-delay:calc(1s + var(--i,0) * .4s);
}
.st-checks li::before{
  content:"✓";display:grid;place-items:center;flex:0 0 22px;height:22px;border-radius:50%;font-size:12px;
  background:var(--sage);color:#f6f5f1;
}
.st-checks li.key{color:var(--ink);font-weight:500}
.st-checks li.key::before{background:var(--sage-d)}
.js .stamps:not(.in) .st-checks li{opacity:0;transform:translateX(-8px)}

/* ---- responsive ---- */
@media (max-width:960px){
  .sm-steps{grid-template-columns:1fr 1fr}
  .sm-step,.sm-step[data-step="second"]{grid-column:span 1}
  .sm-step[data-step="publish"]{grid-column:1 / -1}
}
@media (max-width:600px){
  .sm{padding:18px}
  .sm-top .cs-btn{margin-left:0;width:100%;justify-content:center}
  .sm-steps{grid-template-columns:1fr}
  .sm-sort{grid-template-columns:1fr}
  .hub{height:300px}
  .hb-nodes li{font-size:10px;padding:6px 8px}
  .hb-core{padding:12px 16px}
  .hb-core span{font-size:13px}
  .names li{font-size:11.5px;padding:7px 9px}
  .names li code{font-size:10.5px}
  .stamps{grid-template-columns:1fr;height:auto}
  .st-maps{height:190px;margin-right:28px}
  .tg-center{width:120px;height:120px;font-size:13px}
}
@media (prefers-reduced-motion: reduce){
  .tg-center{opacity:1;transform:translate(-50%,-50%)}
  .tg-node.a{left:22%;top:22%} .tg-node.b{left:78%;top:22%} .tg-node.c{left:50%;top:86%}
  .spines .first .bad{width:70%} .spines .first .ok{width:30%} .spines .flip .ok{width:100%}
}