/* ==========================================================================
   WARDENCLYFFE — a three-dimensional reconstruction
   ========================================================================== */

:root{
  --bg:            #05080d;
  --bg-2:          #080c13;
  --ink:           #ece3d2;
  --ink-soft:      #cfc7b6;
  --muted:         #918b7d;
  --muted-2:       #6d685d;
  --brass:         #c8a165;
  --brass-dim:     rgba(200,161,101,.28);
  --cyan:          #7fd6ff;
  --line:          rgba(255,255,255,.09);
  --panel-w:       462px;

  --serif: "Iowan Old Style","Palatino Linotype","Book Antiqua",Palatino,"Songti SC","Noto Serif CJK SC","Source Han Serif SC","SimSun",Georgia,serif;
  --sans:  "Inter","Segoe UI Variable","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --mono:  "SFMono-Regular","Cascadia Code","Consolas","Liberation Mono",monospace;
}

*,*::before,*::after{ box-sizing:border-box; }

html,body{
  margin:0; padding:0;
  width:100%; height:100%;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow:hidden;
  overscroll-behavior:none;
}

button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
a{ color:inherit; }
em,i{ font-style:normal; }
kbd{
  font-family:var(--mono); font-size:9px; line-height:1;
  padding:3px 5px; border:1px solid rgba(255,255,255,.18); border-radius:2px;
  color:var(--ink-soft); background:rgba(255,255,255,.03);
}

#app{ position:fixed; inset:0; overflow:hidden; }

#stage{ position:absolute; inset:0; cursor:grab; }
#stage.dragging{ cursor:grabbing; }
#stage canvas{ display:block; width:100%; height:100%; outline:none; }

/* ---------- atmosphere overlays ---------- */

.vignette{
  position:absolute; inset:0; pointer-events:none; z-index:2;
  background:
    linear-gradient(180deg,rgba(3,5,9,.55) 0%,rgba(3,5,9,0) 22%),
    radial-gradient(ellipse 75% 65% at 46% 44%,rgba(0,0,0,0) 35%,rgba(2,4,8,.42) 78%,rgba(2,4,8,.78) 100%);
}

.grain{
  position:absolute; inset:-50%; pointer-events:none; z-index:5; opacity:.05;
  mix-blend-mode:soft-light;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

.edge-shade{
  position:absolute; left:0; top:0; bottom:0; width:300px; z-index:4; pointer-events:none;
  background:linear-gradient(90deg,rgba(4,6,10,.92) 0%,rgba(4,6,10,.62) 38%,rgba(4,6,10,0) 100%);
}

/* ---------- masthead ---------- */

.masthead{
  position:absolute; z-index:20; top:38px; left:46px; right:calc(var(--panel-w) + 40px);
  display:flex; align-items:flex-start; justify-content:space-between; gap:24px;
  pointer-events:none;
}
.brand{ pointer-events:auto; max-width:640px; }
.brand-kicker{
  display:block; font-family:var(--mono); font-size:9px; letter-spacing:.34em;
  color:var(--brass); opacity:.78; margin-bottom:12px;
}
.brand h1{
  margin:0; font-family:var(--serif); font-weight:400;
  font-size:clamp(30px,3.5vw,54px); line-height:.94;
  letter-spacing:.155em; color:var(--ink);
  text-shadow:0 2px 30px rgba(0,0,0,.55);
}
.brand-sub{
  margin:14px 0 0; font-size:11px; letter-spacing:.08em; color:#9a9486;
  letter-spacing:.1em; line-height:1.6;
}
.brand-sub .slash{ color:var(--brass); opacity:.45; margin:0 7px; }

.masthead-actions{ display:flex; gap:8px; pointer-events:auto; flex-shrink:0; }
.ghost{
  border:1px solid rgba(255,255,255,.14);
  background:rgba(8,12,18,.32);
  -webkit-backdrop-filter:blur(10px); backdrop-filter:blur(10px);
  color:#b8b1a2; font-size:9.5px; letter-spacing:.16em;
  padding:9px 13px; border-radius:2px;
  transition:border-color .3s,color .3s,background .3s;
}
.ghost:hover{ border-color:rgba(200,161,101,.6); color:var(--ink); background:rgba(16,21,29,.55); }
.ghost:focus-visible{ outline:1px solid var(--cyan); outline-offset:3px; }
.ghost.icon-only{ padding:9px 10px; display:grid; place-items:center; }
.ghost.panel-toggle{ display:block; }

/* ---------- chapter rail ---------- */

.chapters{
  position:absolute; z-index:20; left:46px; top:50%; transform:translateY(-46%);
  display:flex; flex-direction:column; gap:2px;
}
.chapters::before{
  content:""; position:absolute; left:29px; top:-18px; bottom:-18px; width:1px;
  background:linear-gradient(180deg,transparent,rgba(200,161,101,.18) 12%,rgba(200,161,101,.18) 88%,transparent);
}
.chapters button{
  position:relative; display:grid; grid-template-columns:30px 22px auto;
  align-items:center; gap:8px; height:40px; padding:0 6px 0 0;
  color:#8e887b; opacity:.55; transition:opacity .35s,color .35s;
  text-align:left;
}
.chapters button:hover{ opacity:.95; color:var(--ink-soft); }
.chapters button.active{ opacity:1; color:var(--ink); }
.chapters .idx{
  font-family:var(--mono); font-size:8.5px; letter-spacing:.1em; color:#7a7468;
  justify-self:end;
}
.chapters button.active .idx{ color:var(--brass); }
.chapters .bar{
  display:block; width:14px; height:1px; background:rgba(255,255,255,.28);
  transition:width .45s cubic-bezier(.16,1,.3,1),background .45s;
}
.chapters button.active .bar{ width:22px; background:var(--brass); }
.chapters .name{
  font-size:11px; letter-spacing:.22em; white-space:nowrap;
  font-family:var(--serif);
}
.chapters button:focus-visible{ outline:1px solid var(--cyan); outline-offset:2px; }

/* ---------- hint ---------- */

.hint{
  position:absolute; z-index:15; left:50%; bottom:86px; transform:translateX(-50%);
  margin:0; font-family:var(--mono); font-size:8.5px; letter-spacing:.2em;
  color:#6d685d; pointer-events:none; opacity:1; transition:opacity 1.2s;
  white-space:nowrap;
}
.hint.gone{ opacity:0; }

/* ---------- dock ---------- */

.dock{
  position:absolute; z-index:25; left:50%; bottom:24px; transform:translateX(-50%);
  display:flex; align-items:center; gap:8px;
  padding:7px 9px; border:1px solid rgba(255,255,255,.09); border-radius:999px;
  background:rgba(9,13,19,.62);
  -webkit-backdrop-filter:blur(18px) saturate(120%); backdrop-filter:blur(18px) saturate(120%);
  box-shadow:0 12px 40px rgba(0,0,0,.35);
  transition:left .85s cubic-bezier(.16,1,.3,1),opacity .4s;
}
@media (min-width:881px){
  body.panel-open .dock{ left:calc((100% - var(--panel-w)) / 2); }
  body.panel-open .hint{ left:calc((100% - var(--panel-w)) / 2); }
  body:not(.panel-open) .masthead{ right:40px; }
  .masthead{ transition:right .85s cubic-bezier(.16,1,.3,1); }
}
.dock-group{ display:flex; align-items:center; gap:1px; }
.dock-group button{
  display:flex; align-items:center; gap:7px;
  padding:8px 11px; border-radius:999px;
  font-size:9.5px; letter-spacing:.14em; color:#9a9486;
  transition:color .25s,background .25s;
}
.dock-group button i{
  width:5px; height:5px; border-radius:50%;
  border:1px solid rgba(255,255,255,.32); background:transparent;
  transition:background .25s,border-color .25s,box-shadow .25s;
}
.dock-group button:hover{ color:var(--ink-soft); background:rgba(255,255,255,.03); }
.dock-group button.on{ color:var(--ink); }
.dock-group button.on i{
  background:var(--cyan); border-color:var(--cyan);
  box-shadow:0 0 10px rgba(127,214,255,.7);
}
.dock-group button:focus-visible{ outline:1px solid var(--cyan); outline-offset:2px; }
.dock-sep{ width:1px; height:18px; background:rgba(255,255,255,.1); }
.dock-nav{ display:flex; align-items:center; gap:2px; }
.dock-nav button{
  width:26px; height:26px; display:grid; place-items:center;
  border-radius:50%; color:#8e887b; font-size:12px; transition:color .25s,background .25s;
}
.dock-nav button:hover{ color:var(--ink); background:rgba(255,255,255,.05); }
#chapterNow{
  font-family:var(--mono); font-size:9px; letter-spacing:.14em; color:#8e887b;
  min-width:52px; text-align:center;
}

/* ---------- labels & leaders ---------- */

#leaders{ position:absolute; inset:0; width:100%; height:100%; z-index:12; pointer-events:none; overflow:visible; }
#leaders line{ stroke:rgba(216,180,120,.55); stroke-width:1; }
#leaders circle{ fill:var(--brass); opacity:.75; }

#labels{ position:absolute; inset:0; z-index:13; pointer-events:none; }
.label{
  position:absolute; top:0; left:0; pointer-events:auto;
  display:flex; align-items:center; gap:8px;
  padding:5px 9px 5px 7px;
  background:rgba(7,10,15,.34);
  border:1px solid rgba(255,255,255,.07);
  -webkit-backdrop-filter:blur(5px); backdrop-filter:blur(5px);
  border-radius:2px;
  color:var(--ink-soft); font-size:9.5px; letter-spacing:.05em;
  white-space:nowrap; cursor:pointer;
  transition:opacity .45s,border-color .3s,background .3s,color .3s;
  will-change:transform;
}
.label:hover{ border-color:rgba(200,161,101,.55); background:rgba(11,15,22,.72); color:var(--ink); }
.label .l-dot{
  width:5px; height:5px; border-radius:50%; background:var(--brass);
  box-shadow:0 0 0 3px rgba(200,161,101,.14); flex:none;
}
.label .l-txt{ display:flex; flex-direction:column; gap:2px; line-height:1; }
.label .l-txt b{ font-weight:400; font-size:9.5px; letter-spacing:.08em; }
.label .l-txt em{ font-family:var(--mono); font-size:8px; color:#837d70; letter-spacing:.04em; }
.label.hidden{ opacity:0; pointer-events:none; }
.label:focus-visible{ outline:1px solid var(--cyan); outline-offset:2px; }

/* ---------- panel ---------- */

#panel{
  position:absolute; z-index:30; top:0; right:0; bottom:0; width:var(--panel-w);
  display:flex; flex-direction:column;
  background:
    linear-gradient(180deg,rgba(7,10,15,.94) 0%,rgba(6,9,14,.905) 55%,rgba(6,9,14,.94) 100%);
  border-left:1px solid rgba(200,161,101,.16);
  box-shadow:-50px 0 110px rgba(0,0,0,.5);
  -webkit-backdrop-filter:blur(26px) saturate(115%); backdrop-filter:blur(26px) saturate(115%);
  transform:translateX(0);
  transition:transform .85s cubic-bezier(.16,1,.3,1);
}
#panel.closed{ transform:translateX(calc(100% + 2px)); }

.panel-head{ flex:none; padding:26px 40px 0; }
.panel-progress{ height:1px; background:rgba(255,255,255,.08); position:relative; }
.panel-progress span{
  position:absolute; left:0; top:0; bottom:0; width:16.66%;
  background:linear-gradient(90deg,var(--brass),rgba(200,161,101,.4));
  transition:width .7s cubic-bezier(.16,1,.3,1);
}
.panel-meta{
  display:flex; align-items:center; justify-content:space-between;
  margin-top:12px; font-family:var(--mono); font-size:8.5px; letter-spacing:.2em; color:#7d7769;
}
.panel-meta #panelKicker{ color:var(--brass); opacity:.85; }
#panelClose{
  font-family:var(--mono); font-size:8.5px; letter-spacing:.12em; color:#7d7769;
  padding:4px 0 4px 10px; transition:color .25s;
}
#panelClose:hover{ color:var(--ink); }
#panelClose:focus-visible{ outline:1px solid var(--cyan); outline-offset:3px; }

.panel-scroll{
  flex:1 1 auto; overflow-y:auto; overflow-x:hidden;
  padding:26px 40px 64px;
  scrollbar-width:thin; scrollbar-color:rgba(200,161,101,.28) transparent;
}
.panel-scroll::-webkit-scrollbar{ width:4px; }
.panel-scroll::-webkit-scrollbar-track{ background:transparent; }
.panel-scroll::-webkit-scrollbar-thumb{ background:rgba(200,161,101,.24); border-radius:4px; }

#panel article{ display:none; }
#panel article.active{ display:block; animation:panelIn .7s cubic-bezier(.16,1,.3,1) both; }
@keyframes panelIn{
  from{ opacity:0; transform:translateY(14px); }
  to{ opacity:1; transform:translateY(0); }
}

#panel h2{
  font-family:var(--serif); font-weight:400;
  font-size:36px; line-height:1.24; letter-spacing:.015em;
  margin:16px 0 20px; color:var(--ink);
}
#panel h3{
  display:flex; align-items:baseline; gap:9px;
  margin:34px 0 11px;
  font-family:var(--sans); font-weight:500; font-size:10.5px;
  letter-spacing:.2em; color:var(--brass);
}
#panel h3 .n{
  font-family:var(--mono); font-size:8px; color:rgba(200,161,101,.55);
  letter-spacing:.05em;
}
#panel p{
  margin:0 0 15px; font-size:13.5px; line-height:1.95; color:#a9a396;
  letter-spacing:.01em;
}
#panel p strong{ color:#e6ddcb; font-weight:500; }
#panel .lede{
  font-size:14.5px; line-height:1.95; color:#c9c1b0;
  padding-left:16px; border-left:1px solid rgba(200,161,101,.45);
  margin:0 0 26px;
}
#panel .mono{ font-family:var(--mono); font-size:.92em; color:#cfc7b6; }
#panel .sm{ font-size:10px; }

blockquote{
  margin:24px 0; padding:2px 0 2px 18px;
  border-left:1px solid rgba(200,161,101,.35);
  font-family:var(--serif); font-size:15.5px; line-height:1.85; color:#d8cfbd;
}
blockquote cite{
  display:block; margin-top:10px; font-family:var(--mono); font-style:normal;
  font-size:8.5px; letter-spacing:.08em; color:#7f796c;
}

/* spec grid */
.spec-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:1px;
  background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.08);
  margin:0 0 26px;
}
.spec-grid > div{
  background:#080c12; padding:13px 14px 12px;
  display:grid; grid-template-columns:1fr auto; align-items:end;
  grid-template-areas:"k v" "s v"; gap:2px 8px;
}
.spec-grid .k{ grid-area:k; font-family:var(--mono); font-size:8px; letter-spacing:.16em; color:#7f796c; align-self:start; }
.spec-grid .v{ grid-area:v; font-family:var(--serif); font-size:26px; line-height:1; color:var(--ink); }
.spec-grid .v em{ font-family:var(--mono); font-size:9px; color:var(--brass); margin-left:2px; letter-spacing:.02em; }
.spec-grid .s{ grid-area:s; font-family:var(--mono); font-size:8px; color:#6d685d; letter-spacing:.05em; }

/* figure / svg */
.fig{
  margin:26px 0 28px; padding:14px 12px 9px;
  border:1px solid rgba(200,161,101,.18);
  background:
    radial-gradient(ellipse at 50% 0%,rgba(200,161,101,.055),transparent 62%),
    rgba(255,255,255,.012);
}
.fig svg{ display:block; width:100%; height:auto; overflow:visible; }
.fig figcaption{
  margin-top:8px; padding:0 2px;
  font-size:9.5px; line-height:1.75; color:#7c776a; letter-spacing:.02em;
}
.svg-tower .wood,.svg-tower .brace,.svg-tower .deck,.svg-tower .dome,.svg-tower .dome-in,.svg-tower .needle,.svg-tower .lab,.svg-tower .lab-line,.svg-tower .shaft{ fill:none; stroke:#c8a165; }
.svg-tower .wood{ stroke-width:1.7; }
.svg-tower .brace{ stroke-width:.75; opacity:.6; }
.svg-tower .deck{ stroke-width:1; }
.svg-tower .dome{ stroke-width:1.5; fill:rgba(200,161,101,.07); }
.svg-tower .dome-in{ stroke-width:.5; opacity:.35; }
.svg-tower .needle{ stroke-width:1; stroke:#7fd6ff; opacity:.65; }
.svg-tower .lab{ stroke-width:1; fill:rgba(200,161,101,.03); }
.svg-tower .lab-line{ stroke-width:.5; opacity:.4; }
.svg-tower .shaft{ stroke-width:.7; stroke-dasharray:2 3; opacity:.5; }
.svg-tower .ground{ stroke:#6c675d; stroke-width:1; }
.svg-tower .dash{ stroke:#7f796c; stroke-width:.6; stroke-dasharray:2 3; }
.svg-dim line{ stroke:#7f796c; stroke-width:.55; }
.svg-dim text{ fill:#8d8779; font-family:var(--mono); font-size:8.5px; letter-spacing:.02em; }
.svg-dim text.sm{ font-size:7px; fill:#6d685d; }
.svg-label text{ fill:#b7b1a2; font-family:var(--sans); font-size:12px; letter-spacing:.06em; }
.svg-label text.sm{ fill:#8d8779; font-size:10px; }

.svg-circuit line,.svg-circuit path,.svg-circuit ellipse{ fill:none; stroke:#c8a165; }
.svg-circuit line{ stroke-width:1; }
.svg-circuit .ground{ stroke:#6c675d; }
.svg-circuit .coil{ stroke-width:1.3; }
.svg-circuit .coil2 ellipse{ stroke-width:.9; opacity:.8; }
.svg-circuit .spark{ stroke:#7fd6ff; stroke-width:1.2; }
.svg-circuit .arc{ stroke:#7fd6ff; stroke-width:.8; opacity:.7; }
.svg-circuit .couple{ stroke:#8d8779; stroke-width:.6; stroke-dasharray:4 4; }
.svg-circuit .dome{ stroke-width:1.4; fill:rgba(200,161,101,.08); }
.svg-circuit .deck{ stroke-width:1; }
.svg-circuit text{ fill:#b7b1a2; font-family:var(--sans); font-size:13px; letter-spacing:.04em; }
.svg-circuit text.sm{ fill:#8d8779; font-size:10.5px; }
.svg-label text{ pointer-events:none; }

.svg-flow path{
  fill:none; stroke:#7fd6ff; stroke-width:1.4; stroke-linecap:round;
  stroke-dasharray:3 11; opacity:.85;
  animation:flow 1.6s linear infinite;
}
.svg-flow path.p2{ animation-duration:2.1s; }
@keyframes flow{ to{ stroke-dashoffset:-28; } }

.svg-earth .earth{ fill:rgba(127,214,255,.025); stroke:#8d8779; stroke-width:.8; }
.svg-earth .earth-glow{ fill:none; stroke:rgba(127,214,255,.14); stroke-width:6; }
.svg-earth .tower{ fill:rgba(200,161,101,.5); stroke:#c8a165; stroke-width:.8; }
.svg-earth .dome-sm{ fill:rgba(200,161,101,.2); stroke:#c8a165; stroke-width:.8; }
.svg-earth .axis{ stroke:#6c675d; stroke-width:.5; stroke-dasharray:2 4; }
.svg-earth .ray{ fill:none; stroke:#7fd6ff; stroke-width:1; stroke-dasharray:4 5; opacity:.75; animation:flow 2.6s linear infinite; }
.svg-earth .anti{ fill:#7fd6ff; opacity:.8; }
.svg-earth .tick{ stroke:#7f796c; stroke-width:.6; }
.svg-earth text{ fill:#b7b1a2; font-family:var(--sans); font-size:11px; letter-spacing:.05em; }
.svg-earth text.sm{ fill:#8d8779; font-size:9.5px; }
.svg-wave .wave{ fill:none; stroke:rgba(127,214,255,.4); stroke-width:.8; }
.svg-wave text{ fill:#7c776a; font-family:var(--sans); font-size:7.5px; letter-spacing:.06em; }

/* lists */
.steps{ list-style:none; margin:24px 0 8px; padding:0; counter-reset:step; }
.steps li{
  position:relative; padding:0 0 0 38px; margin:0 0 16px;
  font-size:13px; line-height:1.85; color:#a9a396; counter-increment:step;
}
.steps li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute; left:0; top:2px;
  font-family:var(--mono); font-size:8.5px; color:var(--brass);
  letter-spacing:.05em;
  border-top:1px solid rgba(200,161,101,.4); padding-top:4px; width:24px;
}
.steps .step-k{
  display:block; font-family:var(--mono); font-size:8px; letter-spacing:.2em;
  color:#cfc7b6; margin-bottom:3px;
}

.callout{
  margin:26px 0; padding:16px 18px;
  border:1px solid rgba(127,214,255,.16);
  background:linear-gradient(135deg,rgba(127,214,255,.055),rgba(127,214,255,.012));
  font-size:12.5px; line-height:1.85; color:#b7b1a2;
}
.callout-k{
  display:block; font-family:var(--mono); font-size:8px; letter-spacing:.22em;
  color:var(--cyan); margin-bottom:7px;
}

.note{
  margin:26px 0 6px; padding:13px 0 0;
  border-top:1px dashed rgba(255,255,255,.14);
  font-size:11.5px; line-height:1.85; color:#8a8477;
}
.note-k{ display:block; font-family:var(--mono); font-size:8px; letter-spacing:.2em; color:var(--brass); margin-bottom:6px; }
.note.warn .note-k{ color:#d8a05e; }

.compare{ display:grid; grid-template-columns:1fr 1fr; gap:20px; margin:26px 0 8px; }
.compare > div{ border-top:1px solid rgba(255,255,255,.16); padding-top:11px; }
.compare-k{ display:block; font-family:var(--mono); font-size:8px; letter-spacing:.16em; color:var(--brass); margin-bottom:7px; }
.compare p{ font-size:11.5px; line-height:1.8; margin:0; }

.timeline{ margin:28px 0 10px; padding-left:20px; border-left:1px solid rgba(200,161,101,.22); }
.t-item{ position:relative; margin:0 0 18px; }
.t-item::before{
  content:""; position:absolute; left:-24px; top:6px;
  width:5px; height:5px; border-radius:50%; background:var(--brass);
  box-shadow:0 0 0 3px rgba(200,161,101,.1);
}
.t-year{ font-family:var(--mono); font-size:8.5px; letter-spacing:.12em; color:var(--brass); }
.t-item p{ margin:3px 0 0; font-size:12px; line-height:1.8; }

.data-table{ width:100%; border-collapse:collapse; margin:24px 0 8px; }
.data-table th,.data-table td{
  padding:9px 0; border-bottom:1px dotted rgba(255,255,255,.12);
  font-weight:400; text-align:left; font-size:11px; color:#8f8a7d;
}
.data-table td{ font-family:var(--mono); font-size:9.5px; color:#9f998b; text-align:right; }
.data-table td:last-child{ color:#cfc7b6; min-width:76px; }
.data-table tr:last-child th,.data-table tr:last-child td{ border-bottom:0; }

.patents{ list-style:none; margin:18px 0 8px; padding:0; }
.patents li{
  display:grid; grid-template-columns:84px 1fr 36px; gap:8px; align-items:baseline;
  padding:9px 0; border-bottom:1px dotted rgba(255,255,255,.1);
}
.patents span{ font-family:var(--mono); font-size:8.5px; color:var(--brass); letter-spacing:.02em; }
.patents b{ font-weight:400; font-size:11.5px; color:#b7b1a2; }
.patents em{ font-family:var(--mono); font-size:8.5px; color:#6d685d; text-align:right; }

.links{ list-style:none; margin:16px 0; padding:0; }
.links li{ margin:0 0 10px; }
.links a{
  font-size:11.5px; color:#b7b1a2; text-decoration:none;
  border-bottom:1px solid rgba(200,161,101,.28); padding-bottom:2px;
  transition:color .25s,border-color .25s;
}
.links a:hover{ color:var(--ink); border-color:var(--brass); }
.links a:focus-visible{ outline:1px solid var(--cyan); outline-offset:3px; }

.colophon{
  margin-top:30px; padding-top:14px; border-top:1px solid rgba(255,255,255,.08);
  font-size:9.5px; line-height:1.8; color:#6d685d;
}

.panel-foot{
  flex:none; display:flex; align-items:center; justify-content:space-between; gap:8px;
  padding:13px 40px 16px; border-top:1px solid rgba(255,255,255,.07);
  background:rgba(5,8,13,.35);
}
.panel-foot button{
  font-family:var(--mono); font-size:8.5px; letter-spacing:.12em; color:#8e887b;
  padding:5px 0; transition:color .25s;
}
.panel-foot button:hover{ color:var(--ink); }
.panel-foot span{ font-family:var(--mono); font-size:8px; letter-spacing:.14em; color:#6d685d; }
.panel-foot button:focus-visible{ outline:1px solid var(--cyan); outline-offset:3px; }

/* ---------- loading ---------- */

#loading{
  position:absolute; inset:0; z-index:100;
  display:grid; place-items:center;
  background:radial-gradient(ellipse at 50% 42%,#0a1018 0%,#05080d 62%);
  transition:opacity 1s ease,visibility 1s;
}
#loading.done{ opacity:0; visibility:hidden; pointer-events:none; }
.load-inner{ width:min(520px,80vw); text-align:left; }
.load-kicker{ font-family:var(--mono); font-size:8.5px; letter-spacing:.34em; color:var(--brass); }
.load-inner h2{
  margin:18px 0 30px; font-family:var(--serif); font-weight:400;
  font-size:clamp(30px,4.4vw,50px); line-height:1.22; color:var(--ink); letter-spacing:.02em;
}
.load-track{ height:1px; width:100%; background:rgba(255,255,255,.1); position:relative; overflow:hidden; }
.load-track span{
  position:absolute; inset:0 auto 0 0; width:0%;
  background:linear-gradient(90deg,rgba(200,161,101,.2),var(--brass));
  transition:width .6s cubic-bezier(.16,1,.3,1);
}
#loadMsg{
  margin:14px 0 0; font-family:var(--mono); font-size:8.5px; letter-spacing:.14em;
  color:#6d685d; display:flex; justify-content:space-between;
}
#loadMsg::after{ content:"1901 — 1917"; color:rgba(200,161,101,.45); }

/* ---------- toast ---------- */

#toast{
  position:absolute; z-index:80; left:50%; bottom:92px; transform:translate(-50%,10px);
  padding:9px 14px; background:rgba(9,13,19,.85); border:1px solid rgba(255,255,255,.1);
  border-radius:2px; font-size:10px; letter-spacing:.08em; color:#b7b1a2;
  opacity:0; pointer-events:none; transition:opacity .35s,transform .35s;
  -webkit-backdrop-filter:blur(10px); backdrop-filter:blur(10px);
}
#toast.show{ opacity:1; transform:translate(-50%,0); }

.noscript{
  position:fixed; z-index:200; inset:auto 20px 20px 20px; padding:16px 18px;
  background:rgba(9,13,19,.94); border:1px solid rgba(200,161,101,.4);
  color:var(--ink-soft); font-size:12px; line-height:1.7; text-align:center;
}

/* ---------- responsive ---------- */

@media (max-width:1320px){
  :root{ --panel-w:420px; }
  .masthead{ left:34px; }
  .chapters{ left:34px; }
  .panel-head{ padding-left:32px; padding-right:32px; }
  .panel-scroll{ padding-left:32px; padding-right:32px; }
  .panel-foot{ padding-left:32px; padding-right:32px; }
}

@media (max-width:1080px){
  :root{ --panel-w:380px; }
  #panel h2{ font-size:31px; }
  .brand h1{ font-size:clamp(26px,3vw,40px); }
  .brand-sub{ font-size:10px; max-width:330px; }
  .chapters .name{ font-size:10px; }
}

@media (max-width:880px){
  .masthead{ left:20px; top:20px; right:20px; }
  .brand h1{ font-size:28px; letter-spacing:.13em; }
  .brand-kicker{ font-size:7.5px; letter-spacing:.24em; margin-bottom:9px; }
  .brand-sub{ font-size:9px; margin-top:9px; max-width:250px; line-height:1.55; }
  .masthead-actions .ghost:not(.panel-toggle){ display:none; }
  .masthead-actions .panel-toggle{ display:block; }
  .chapters{ display:none; }
  .hint{ display:none; }
  .dock{
    left:12px; right:12px; bottom:12px; transform:none;
    justify-content:space-between; gap:4px; padding:6px 7px; overflow-x:auto;
  }
  .dock-group{ gap:0; }
  .dock-group button{ padding:8px 7px; font-size:8.5px; letter-spacing:.06em; gap:5px; }
  .dock-sep{ display:none; }
  .dock-nav{ margin-left:auto; }
  #chapterNow{ display:none; }
  #panel{
    top:auto; left:0; right:0; bottom:0; width:100%; height:66vh;
    border-left:0; border-top:1px solid rgba(200,161,101,.22);
    border-radius:14px 14px 0 0;
    transform:translateY(100%);
    box-shadow:0 -30px 80px rgba(0,0,0,.55);
  }
  #panel.open{ transform:translateY(0); }
  #panel.closed{ transform:translateY(100%); }
  .panel-head{ padding:16px 22px 0; }
  .panel-meta{ margin-top:8px; }
  .panel-scroll{ padding:18px 22px 42px; }
  #panel h2{ font-size:27px; margin:10px 0 15px; }
  #panel .lede{ font-size:13.5px; margin-bottom:20px; }
  .panel-foot{ padding:10px 22px calc(12px + env(safe-area-inset-bottom)); }
  .panel-foot span{ display:none; }
  body.panel-open .dock{ opacity:0; pointer-events:none; }
  .dock{ transition:opacity .4s; }
  .label .l-txt em{ display:none; }
  #toast{ bottom:80px; }
}

@media (max-width:520px){
  .brand h1{ font-size:22px; }
  .brand-sub{ font-size:8.5px; max-width:210px; }
  .dock-group button{ padding:8px 5px; font-size:8px; }
  #panel{ height:70vh; }
  .spec-grid .v{ font-size:22px; }
  .compare{ grid-template-columns:1fr; gap:14px; }
  .patents li{ grid-template-columns:74px 1fr 32px; }
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
}