.molecule-stage {
  position: relative;
  width: min(100%, 520px);
  height: 330px;
  margin: 18px auto 4px;
  overflow: hidden;
  border: 1px solid rgba(27, 58, 99, 0.13);
  border-radius: 22px;
  background:
    radial-gradient(circle at center, rgba(61, 127, 202, 0.12), transparent 42%),
    linear-gradient(145deg, #ffffff, #eaf0f4);
}

.atom-intro-grid,
.socket-grid,
.chain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.atom-intro-card,
.socket-card,
.chain-card {
  display: grid;
  justify-items: center;
  gap: 9px;
  padding: 19px 12px;
  border: 1px solid rgba(27, 58, 99, 0.13);
  border-radius: 17px;
  background: white;
  color: #10233c;
  text-align: center;
  opacity: 0;
  animation: card-rise .5s ease forwards;
}

.atom-intro-card:nth-child(1), .socket-card:nth-child(1) { animation-delay: .35s; }
.atom-intro-card:nth-child(2), .socket-card:nth-child(2) { animation-delay: 1.05s; }
.atom-intro-card:nth-child(3), .socket-card:nth-child(3) { animation-delay: 1.75s; }
.atom-intro-card:nth-child(4), .socket-card:nth-child(4) { animation-delay: 2.45s; }

.atom-intro-card small,
.socket-card span {
  color: #637285;
  font-size: 12px;
}

.intro-atom,
.socket-atom,
.mini-carbon {
  display: grid;
  place-items: center;
  border: 4px solid rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  color: white;
  font-weight: 900;
  box-shadow: 0 8px 18px rgba(16, 35, 60, 0.2);
}

.intro-atom {
  width: 78px;
  height: 78px;
  font-size: 25px;
  animation: atom-pulse 2.6s ease-in-out infinite;
}

.socket-grid { grid-template-columns: 1.35fr repeat(3, 1fr); }
.socket-atom {
  position: relative;
  width: 82px;
  height: 82px;
  margin: 15px;
  font-size: 25px;
}

.socket {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 3px solid white;
  border-radius: 50%;
  background: #ff6b35;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .2);
  animation: socket-ping 1.8s ease-in-out infinite;
}
.socket.top { top: -11px; left: 31px; }
.socket.right { top: 31px; right: -11px; }
.socket.bottom { bottom: -11px; left: 31px; }
.socket.left { top: 31px; left: -11px; }

.chain-grid { grid-template-columns: repeat(3, 1fr); }
.chain-card:nth-child(1) { animation-delay: .35s; }
.chain-card:nth-child(2) { animation-delay: 1.05s; }
.chain-card:nth-child(3) { animation-delay: 1.75s; }
.chain-card.active { border-color: #ff6b35; box-shadow: 0 9px 22px rgba(255, 107, 53, .12); }
.chain-card b { color: #3d7fca; }
.mini-chain { display: flex; min-height: 63px; align-items: center; justify-content: center; }
.mini-carbon { width: 56px; height: 56px; background: #283f59; }
.mini-chain i { width: 25px; height: 5px; background: #8799a8; }

.molecule-stage::before {
  content: "CONSTRUCTION DE LA MOLÉCULE";
  position: absolute;
  top: 15px;
  left: 18px;
  color: #637285;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.mol-atom,
.mol-bond,
.mol-result {
  position: absolute;
  opacity: 0;
  animation: atom-arrival 0.55s cubic-bezier(.2, .8, .25, 1) forwards;
}

.mol-atom {
  z-index: 3;
  display: grid;
  width: 62px;
  height: 62px;
  place-items: center;
  border: 4px solid rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  color: white;
  font-size: 21px;
  font-weight: 900;
  box-shadow: 0 9px 19px rgba(16, 35, 60, 0.22);
}

.mol-atom::after {
  content: attr(data-name);
  position: absolute;
  top: 66px;
  width: max-content;
  color: #637285;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.mol-c { background: #283f59; }
.mol-h { background: #84b7ec; }
.mol-f { background: #3d7fca; }
.mol-cl { background: #4fb887; }

.mol-bond {
  z-index: 1;
  height: 6px;
  border-radius: 99px;
  background: linear-gradient(90deg, #a5b4c1, #5f7487);
  transform-origin: left center;
  animation-name: bond-growth;
}

.mol-result {
  right: 16px;
  bottom: 14px;
  left: 16px;
  color: #10233c;
  text-align: center;
  font-family: "Trebuchet MS", Calibri, Arial, sans-serif;
  font-size: 21px;
  font-weight: 700;
  animation-delay: 5.4s;
}

.mol-r22 .central { left: calc(50% - 31px); top: 134px; animation-delay: .25s; }
.mol-r22 .bond-h { left: calc(50% + 21px); top: 150px; width: 110px; transform: rotate(-36deg); animation-delay: 1.05s; }
.mol-r22 .atom-h { left: calc(50% + 105px); top: 69px; animation-delay: 1.45s; }
.mol-r22 .bond-f1 { left: calc(50% + 22px); top: 175px; width: 108px; transform: rotate(34deg); animation-delay: 2.05s; }
.mol-r22 .atom-f1 { left: calc(50% + 103px); top: 207px; animation-delay: 2.45s; }
.mol-r22 .bond-f2 { left: calc(50% - 21px); top: 175px; width: 108px; transform: rotate(146deg); animation-delay: 3.05s; }
.mol-r22 .atom-f2 { left: calc(50% - 165px); top: 207px; animation-delay: 3.45s; }
.mol-r22 .bond-cl { left: calc(50% - 21px); top: 150px; width: 110px; transform: rotate(216deg); animation-delay: 4.05s; }
.mol-r22 .atom-cl { left: calc(50% - 167px); top: 69px; animation-delay: 4.45s; }

.mol-r134a { height: 350px; }
.mol-r134a .carbon-left { left: calc(50% - 75px); top: 137px; animation-delay: .25s; }
.mol-r134a .carbon-right { left: calc(50% + 13px); top: 137px; animation-delay: .65s; }
.mol-r134a .bond-cc { left: calc(50% - 13px); top: 165px; width: 32px; animation-delay: .48s; }
.mol-r134a .bond-a1 { left: calc(50% - 55px); top: 145px; width: 100px; transform: rotate(215deg); animation-delay: 1.05s; }
.mol-r134a .atom-a1 { left: calc(50% - 157px); top: 64px; animation-delay: 1.38s; }
.mol-r134a .bond-a2 { left: calc(50% - 55px); top: 180px; width: 100px; transform: rotate(145deg); animation-delay: 1.72s; }
.mol-r134a .atom-a2 { left: calc(50% - 157px); top: 213px; animation-delay: 2.05s; }
.mol-r134a .bond-a3 { left: calc(50% - 43px); top: 138px; width: 76px; transform: rotate(270deg); animation-delay: 2.38s; }
.mol-r134a .atom-a3 { left: calc(50% - 75px); top: 49px; animation-delay: 2.71s; }
.mol-r134a .bond-b1 { left: calc(50% + 61px); top: 145px; width: 100px; transform: rotate(-35deg); animation-delay: 3.04s; }
.mol-r134a .atom-b1 { left: calc(50% + 107px); top: 64px; animation-delay: 3.37s; }
.mol-r134a .bond-b2 { left: calc(50% + 61px); top: 180px; width: 100px; transform: rotate(35deg); animation-delay: 3.70s; }
.mol-r134a .atom-b2 { left: calc(50% + 107px); top: 213px; animation-delay: 4.03s; }
.mol-r134a .bond-b3 { left: calc(50% + 44px); top: 138px; width: 76px; transform: rotate(270deg); animation-delay: 4.36s; }
.mol-r134a .atom-b3 { left: calc(50% + 13px); top: 49px; animation-delay: 4.69s; }

.reveal-cascade > * {
  opacity: 0;
  animation: card-rise .48s ease forwards;
}
.reveal-cascade > *:nth-child(1) { animation-delay: .35s; }
.reveal-cascade > *:nth-child(2) { animation-delay: 1.1s; }
.reveal-cascade > *:nth-child(3) { animation-delay: 1.85s; }
.molecule-stage + .reveal-cascade > *:nth-child(1) { animation-delay: 5.75s; }
.molecule-stage + .reveal-cascade > *:nth-child(2) { animation-delay: 6.15s; }
.molecule-stage + .reveal-cascade > *:nth-child(3) { animation-delay: 6.55s; }

.molecule-lab {
  display: grid;
  gap: 17px;
}

.lab-code {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.lab-code span { padding: 8px 13px; border-radius: 999px; background: #10233c; color: white; font-family: "Trebuchet MS", Calibri, sans-serif; font-size: 22px; }
.lab-code b, .lab-code strong { padding: 7px 11px; border-radius: 10px; background: white; color: #10233c; }
.lab-code strong { border: 2px dashed #4fb887; color: #247b59; }
.lab-code i { color: #ff6b35; font-style: normal; font-weight: 900; }

.lab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 16px;
  align-items: stretch;
}

.lab-board {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  border: 1px solid rgba(27, 58, 99, .15);
  border-radius: 20px;
  background:
    radial-gradient(circle at center, rgba(61, 127, 202, .13), transparent 42%),
    repeating-radial-gradient(circle at center, transparent 0 47px, rgba(61, 127, 202, .035) 48px 49px),
    white;
}

.lab-svg { width: 100%; height: 100%; min-height: 390px; }
.lab-wire {
  stroke: #c4d0d9;
  stroke-width: 7;
  stroke-linecap: round;
  stroke-dasharray: 11 10;
  transition: stroke .25s ease;
}
.lab-wire.connected {
  stroke: #ff6b35;
  stroke-dasharray: 230;
  stroke-dashoffset: 230;
  filter: url(#labGlow);
  animation: lab-wire-connect .55s ease forwards;
}
.lab-carbon { fill: #283f59; stroke: white; stroke-width: 7; filter: drop-shadow(0 9px 12px rgba(16,35,60,.25)); }
.lab-carbon-text { fill: white; text-anchor: middle; font-size: 37px; font-weight: 900; font-family: "Segoe UI", sans-serif; }
.lab-socket-dot { fill: #fff; stroke: #ff6b35; stroke-width: 5; animation: lab-socket-pulse 1.8s ease-in-out infinite; }

.lab-slot {
  position: absolute;
  z-index: 4;
  display: grid;
  width: 70px;
  height: 70px;
  place-items: center;
  border: 3px dashed #ff6b35;
  border-radius: 50%;
  background: rgba(255,255,255,.93);
  color: #ff6b35;
  font-size: 26px;
  font-weight: 900;
  box-shadow: 0 6px 16px rgba(16,35,60,.12);
  transform: translate(-50%, -50%);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.lab-slot:hover, .lab-slot.drop-ready { transform: translate(-50%, -50%) scale(1.13); box-shadow: 0 0 0 10px rgba(255,107,53,.12); }
.lab-slot.filled { border-style: solid; border-color: white; color: white; animation: lab-atom-snap .45s cubic-bezier(.2,.9,.3,1.25); }
.lab-slot.lab-h { background:#84b7ec; }
.lab-slot.lab-f { background:#3d7fca; }
.lab-slot.lab-cl { background:#4fb887; }
.slot-top { left:50%; top:14.5%; }
.slot-right { left:84.6%; top:50%; }
.slot-bottom { left:50%; top:85.5%; }
.slot-left { left:15.4%; top:50%; }

.lab-tray {
  padding: 17px;
  border-radius: 20px;
  background: #eff3f5;
  border: 1px solid rgba(27, 58, 99, .15);
  color: #10233c;
  text-align: center;
}
.lab-tray p { margin: 0 0 14px; font-weight: 800; line-height: 1.35; }
.lab-tray small { color: #637285; font-size: 10px; }
.lab-token-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; }
.lab-token {
  display: grid;
  width: 61px;
  height: 61px;
  place-self: center;
  place-items: center;
  border: 4px solid rgba(255,255,255,.78);
  border-radius: 50%;
  color: white;
  font-size: 19px;
  font-weight: 900;
  box-shadow: 0 7px 13px rgba(0,0,0,.25);
  cursor: grab;
  touch-action: none;
  transition: transform .16s ease, opacity .16s ease, box-shadow .16s ease;
}
.lab-token:hover, .lab-token.selected { transform: scale(1.12); box-shadow: 0 0 0 7px rgba(255,255,255,.13); }
.lab-token.selected { outline: 3px solid #ffb18f; }
.lab-token:disabled { opacity: .16; cursor: default; transform: scale(.82); }
.lab-drag-ghost {
  position: fixed;
  z-index: 9999;
  margin: -31px 0 0 -31px;
  pointer-events: none;
  opacity: .9;
  transform: scale(1.12);
}

.lab-feedback {
  min-height: 48px;
  margin: 0;
  padding: 13px 17px;
  border-left: 5px solid #3d7fca;
  border-radius: 10px;
  background: white;
  color: #40526a;
  line-height: 1.45;
}
.lab-feedback strong { color:#10233c; }
.lab-actions { display:flex; justify-content:center; gap:10px; flex-wrap:wrap; }
.molecule-lab.wrong .lab-board { animation: lab-shake .4s ease; }
.molecule-lab.wrong .lab-feedback { border-color:#d24d3d; background:#fff0ee; }
.molecule-lab.success .lab-board { box-shadow: 0 0 0 4px rgba(79,184,135,.25), 0 18px 35px rgba(79,184,135,.16); }
.molecule-lab.success .lab-carbon { fill:#247b59; animation: lab-success-pulse 1s ease infinite alternate; }
.molecule-lab.success .lab-feedback { border-color:#299668; background:#e9f8ef; }

.series-roadmap {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 11px;
}

.series-stop {
  position: relative;
  display: grid;
  min-height: 132px;
  align-content: start;
  gap: 4px;
  overflow: hidden;
  padding: 17px 16px 14px 24px;
  border: 1px solid rgba(27,58,99,.13);
  border-radius: 16px;
  background: white;
  opacity: 0;
  animation: card-rise .45s ease forwards;
  animation-delay: calc(.18s + var(--series-order) * .22s);
}
.series-stop::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 7px;
  background: linear-gradient(#3d7fca, #84b7ec);
}
.series-stop:nth-child(5)::before,
.series-stop:nth-child(6)::before { background: linear-gradient(#ff6b35, #ffb18f); }
.series-stop:nth-child(7)::before,
.series-stop:nth-child(8)::before,
.series-stop:nth-child(9)::before { background: linear-gradient(#4fb887, #9fdbbe); }
.series-stop b { color:#3d7fca; font-family:"Trebuchet MS", Calibri, Arial, sans-serif; font-size:27px; }
.series-stop:nth-child(5) b,
.series-stop:nth-child(6) b { color:#d84f20; }
.series-stop:nth-child(n+7) b { color:#247b59; }
.series-stop strong { color:#10233c; font-size:14px; }
.series-stop span { color:#40526a; font-size:12px; font-weight:800; }
.series-stop small { margin-top:auto; color:#637285; font-size:11px; }

.same-stock {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.same-stock span,
.same-stock strong {
  padding: 7px 12px;
  border-radius: 999px;
  background: white;
  color:#10233c;
  font-weight:900;
}
.same-stock strong { background:#10233c; color:white; }

.isomer-stage {
  position: relative;
  width: min(100%, 650px);
  height: 350px;
  margin-inline: auto;
  overflow: hidden;
  border: 1px solid rgba(27,58,99,.13);
  border-radius: 21px;
  background:
    radial-gradient(circle at center, rgba(61,127,202,.13), transparent 45%),
    white;
}
.iso-atom {
  position: absolute;
  z-index: 3;
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  margin: -29px 0 0 -29px;
  border: 4px solid rgba(255,255,255,.86);
  border-radius: 50%;
  color:white;
  font-size:20px;
  font-weight:900;
  box-shadow:0 8px 17px rgba(16,35,60,.2);
  transition: left 1.05s cubic-bezier(.2,.8,.25,1), top 1.05s cubic-bezier(.2,.8,.25,1), background .3s ease;
}
.iso-carbon { width:70px; height:70px; margin:-35px 0 0 -35px; background:#283f59; }
.iso-h { background:#84b7ec; }
.iso-f { background:#3d7fca; }
.carbon-one { left:42%; top:49%; }
.carbon-two { left:58%; top:49%; }
.atom-l1 { left:18%; top:25%; }
.atom-l3 { left:42%; top:15%; }
.atom-r1 { left:58%; top:15%; }
.atom-r2 { left:82%; top:25%; }
.swap-f { left:18%; top:73%; }
.swap-h { left:82%; top:73%; }
.isomer-demo[data-state="r134a"] .swap-f { left:82%; top:73%; }
.isomer-demo[data-state="r134a"] .swap-h { left:18%; top:73%; }

.iso-bond {
  position:absolute;
  z-index:1;
  height:5px;
  border-radius:999px;
  background:#9cabb7;
  transform-origin:left center;
}
.bond-center { left:45%; top:48%; width:10%; }
.bond-l1 { left:21%; top:28%; width:24%; transform:rotate(29deg); }
.bond-l2 { left:21%; top:69%; width:24%; transform:rotate(-29deg); }
.bond-l3 { left:42%; top:22%; width:26%; transform:rotate(90deg); }
.bond-r1 { left:58%; top:22%; width:26%; transform:rotate(90deg); }
.bond-r2 { left:61%; top:47%; width:24%; transform:rotate(-29deg); }
.bond-r3 { left:61%; top:52%; width:24%; transform:rotate(29deg); }

.isomer-name {
  position:absolute;
  right:0;
  bottom:14px;
  left:0;
  display:flex;
  align-items:baseline;
  justify-content:center;
  gap:14px;
  color:#10233c;
}
.isomer-name b { color:#ff6b35; font-family:"Trebuchet MS", Calibri, Arial, sans-serif; font-size:28px; }
.isomer-name span { font-weight:900; }
.isomer-actions {
  display:flex;
  align-items:center;
  justify-content:center;
  gap:15px;
  flex-wrap:wrap;
  margin-top:12px;
}
.isomer-actions p { margin:0; color:#40526a; font-weight:800; }

.blend-demo { display:grid; gap:15px; }
.blend-legend {
  display:flex;
  justify-content:center;
  gap:8px;
  flex-wrap:wrap;
}
.blend-legend span {
  padding:7px 12px;
  border-radius:999px;
  color:white;
  font-weight:900;
}
.r32 { background:#3d7fca; }
.r125 { background:#ff6b35; }
.r134a { background:#4fb887; }
.bottle-row {
  display:grid;
  grid-template-columns:repeat(3, minmax(0,1fr));
  gap:clamp(14px,4vw,36px);
  align-items:end;
  max-width:780px;
  margin-inline:auto;
}
.blend-bottle-card {
  display:grid;
  justify-items:center;
  color:#10233c;
}
.blend-bottle-card > strong { margin-top:9px; font-family:"Trebuchet MS", Calibri, Arial, sans-serif; font-size:25px; }
.bottle-neck {
  width:54px;
  height:27px;
  border:5px solid #10233c;
  border-bottom:0;
  border-radius:8px 8px 0 0;
  background:white;
}
.blend-bottle {
  display:flex;
  width:min(100%, 180px);
  height:285px;
  flex-direction:column;
  justify-content:flex-end;
  overflow:hidden;
  border:5px solid #10233c;
  border-radius:17px 17px 35px 35px;
  background:white;
  box-shadow:0 15px 25px rgba(16,35,60,.14);
}
.blend-layer {
  position:relative;
  display:grid;
  height:calc(var(--pct) * 1%);
  min-height:26px;
  place-content:center;
  color:white;
  text-align:center;
  transform-origin:bottom;
  animation:bottle-fill .85s cubic-bezier(.2,.8,.25,1) backwards;
  animation-delay:calc(.35s + var(--fill-order) * .17s);
}
.blend-layer::after {
  content:"";
  position:absolute;
  inset:0;
  opacity:.22;
  background:radial-gradient(circle at 20% 28%, white 0 3px, transparent 4px),radial-gradient(circle at 76% 70%, white 0 2px, transparent 3px);
  background-size:35px 31px,42px 38px;
}
.blend-layer span,
.blend-layer b { position:relative; z-index:1; }
.blend-layer span { font-size:11px; font-weight:800; }
.blend-layer b { font-size:16px; }
.blend-equation {
  display:flex;
  justify-content:center;
  align-items:center;
  gap:9px;
  flex-wrap:wrap;
  margin:0;
  color:#40526a;
  font-weight:800;
}
.blend-equation span,
.blend-equation strong { padding:8px 11px; border-radius:10px; background:white; }
.blend-equation strong { color:#247b59; }
.blend-equation i { color:#ff6b35; font-style:normal; font-size:22px; }

@keyframes lab-wire-connect { to { stroke-dashoffset: 0; } }
@keyframes lab-socket-pulse { 50% { r:14; opacity:.62; } }
@keyframes lab-atom-snap { 0% { transform:translate(-50%,-50%) scale(.25) rotate(-20deg); } 70% { transform:translate(-50%,-50%) scale(1.18) rotate(4deg); } 100% { transform:translate(-50%,-50%) scale(1); } }
@keyframes lab-shake { 20% { transform:translateX(-8px); } 40% { transform:translateX(8px); } 60% { transform:translateX(-5px); } 80% { transform:translateX(5px); } }
@keyframes lab-success-pulse { to { filter:drop-shadow(0 0 13px rgba(79,184,135,.9)); } }
@keyframes bottle-fill { from { clip-path:inset(100% 0 0); transform:translateY(10px); opacity:.2; } to { clip-path:inset(0); transform:translateY(0); opacity:1; } }

@keyframes atom-arrival {
  0% { opacity: 0; transform: scale(.25); filter: blur(5px); }
  70% { opacity: 1; transform: scale(1.13); filter: blur(0); }
  100% { opacity: 1; transform: scale(1); filter: blur(0); }
}

@keyframes bond-growth {
  from { opacity: 0; scale: 0 1; }
  to { opacity: 1; scale: 1 1; }
}

@keyframes card-rise {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes atom-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.07); }
}

@keyframes socket-ping {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 107, 53, .3); }
  50% { transform: scale(1.18); box-shadow: 0 0 0 7px rgba(255, 107, 53, 0); }
}

@media (max-width: 760px) {
  .atom-intro-grid, .socket-grid, .chain-grid { grid-template-columns: 1fr 1fr; }
  .series-roadmap { grid-template-columns:1fr 1fr; }
  .lab-layout { grid-template-columns: 1fr; }
  .lab-tray { order:-1; }
  .lab-token-grid { grid-template-columns: repeat(7, 1fr); }
  .lab-token { width:52px; height:52px; }
}

@media (max-width: 580px) {
  .molecule-stage { transform: scale(.82); width: 122%; margin-left: -11%; margin-block: -10px -20px; }
  .series-roadmap { grid-template-columns:1fr; }
  .series-stop { min-height:105px; }
  .lab-token-grid { grid-template-columns: repeat(4, 1fr); }
  .lab-board, .lab-svg { min-height:320px; }
  .lab-slot { width:58px; height:58px; }
  .isomer-stage { height:320px; }
  .iso-atom { width:50px; height:50px; margin:-25px 0 0 -25px; }
  .iso-carbon { width:60px; height:60px; margin:-30px 0 0 -30px; }
  .isomer-name { align-items:center; flex-direction:column; gap:1px; }
  .bottle-row { gap:8px; }
  .blend-bottle { height:245px; border-width:4px; }
  .blend-layer span { font-size:9px; }
  .blend-layer b { font-size:13px; }
  .bottle-neck { width:44px; border-width:4px; }
  .blend-bottle-card > strong { font-size:20px; }
}

/* Filet pour l'IMPRESSION uniquement, jamais pour prefers-reduced-motion :
   sur une machine aux effets d'animation Windows désactivés (MinAnimate=0),
   ce média se déclenche EN PERMANENCE et supprimerait la construction pas
   à pas des molécules — le cœur pédagogique de ce module. Piège déjà vécu
   sur la frise vivante, voir REPRISE.md §5. */
@media print {
  .mol-atom, .mol-bond, .mol-result, .reveal-cascade > *, .atom-intro-card, .socket-card, .chain-card, .series-stop, .blend-layer {
    opacity: 1;
    animation: none;
  }
  .intro-atom, .socket { animation: none; }
  .lab-socket-dot, .lab-carbon { animation:none !important; }
}