:root{
  --bg:#07080c;
  --ink:#eef1f6;
  --dim:#8b93a4;
  --line:rgba(255,255,255,.13);
  --accent:#7ce7ff;
  --panelbg:rgba(10,12,18,.72);
  --serif: ui-serif, "Iowan Old Style", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink)}
body{
  font-family:var(--serif);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
button{font:inherit;color:inherit;cursor:pointer}

/* ---------- stage ---------- */
#stage{
  position:relative;
  width:100%;
  height:100svh;
  min-height:560px;
  overflow:hidden;
  background:#05060a;
}
#gl,#ov{position:absolute;inset:0;width:100%;height:100%;display:block}
#ov{pointer-events:none}

/* ---------- brand ---------- */
#brand{
  position:absolute;left:clamp(14px,3vw,34px);top:clamp(14px,3vh,28px);
  z-index:5;pointer-events:none;
  text-shadow:0 2px 22px rgba(0,0,0,.85);
}
#brand h1{
  margin:0;font-size:clamp(20px,2.6vw,30px);font-weight:600;letter-spacing:.01em;
}
#brand p{
  margin:.35em 0 0;font-family:var(--mono);font-size:clamp(9.5px,1.05vw,11.5px);
  letter-spacing:.11em;text-transform:uppercase;color:var(--dim);
}

/* ---------- axis labels (agent view only) ---------- */
#axes{position:absolute;inset:0;z-index:4;pointer-events:none;opacity:0;transition:opacity .5s}
#axes.on{opacity:1}
.ax{position:absolute;font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;
    text-transform:uppercase;color:var(--dim);white-space:nowrap}
.ax-x{left:50%;bottom:calc(clamp(150px,20vh,190px));transform:translateX(-50%)}
.ax-y{left:clamp(14px,3vw,34px);top:50%;transform:rotate(-90deg) translateX(-50%);transform-origin:left center}
.ax span{border-bottom:1px solid var(--line);padding-bottom:3px}

/* ---------- step panel ---------- */
#panel{
  position:absolute;z-index:6;
  right:clamp(14px,3vw,34px);top:clamp(64px,12vh,110px);
  width:min(360px,42vw);
  background:var(--panelbg);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:14px;
  padding:18px 20px 16px;
}
#stepNum{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--accent);opacity:.85}
#panel h2{margin:.5em 0 .35em;font-size:19px;font-weight:600;line-height:1.2}
#panel p{margin:0;font-size:15px;line-height:1.5;color:#d3d8e2}
#panel p b{color:#fff}
#panelNav{display:flex;align-items:center;gap:10px;margin-top:16px}

button.ghost{
  background:transparent;border:1px solid var(--line);border-radius:999px;
  padding:7px 13px;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;
  color:var(--dim);transition:.18s;
}
button.ghost:hover{color:#fff;border-color:rgba(255,255,255,.4)}
button.ghost.active{color:#05060a;background:var(--accent);border-color:var(--accent)}
#next{
  background:#fff;color:#05060a;border:0;border-radius:999px;
  padding:8px 18px;font-family:var(--mono);font-size:11px;letter-spacing:.06em;font-weight:600;
}
#next:hover{background:var(--accent)}
#prev{padding:7px 11px}
#freeplay{margin-left:auto}

/* ---------- dock ---------- */
#dock{
  position:absolute;z-index:6;left:50%;transform:translateX(-50%);
  bottom:clamp(16px,3.5vh,30px);
  display:flex;flex-direction:column;align-items:center;gap:12px;
  width:min(760px,calc(100% - 28px));
}
button.primary{
  display:inline-flex;align-items:center;gap:12px;
  background:rgba(255,255,255,.055);
  border:1px solid rgba(124,231,255,.45);
  color:#fff;border-radius:999px;
  padding:13px 26px 13px 20px;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.05em;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 0 0 0 rgba(124,231,255,.35);
  transition:.22s;
}
button.primary:hover{background:rgba(124,231,255,.13);box-shadow:0 0 34px -6px rgba(124,231,255,.5)}
button.primary.pulse{animation:pulse 1.8s ease-in-out infinite}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 0 rgba(124,231,255,.45);border-color:rgba(124,231,255,.45)}
  50%{box-shadow:0 0 40px -4px rgba(124,231,255,.75);border-color:rgba(124,231,255,1)}
}
.flipIcon{
  width:15px;height:15px;border:1.6px solid var(--accent);border-radius:3px;
  display:inline-block;transition:transform .7s cubic-bezier(.65,0,.35,1);
}
body.fieldview .flipIcon{transform:rotate(90deg);border-radius:50%}

.dockRow{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center;
  background:var(--panelbg);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:999px;padding:8px 12px;
}
.knob{display:flex;align-items:center;gap:9px;padding:0 6px}
.knob span{font-family:var(--mono);font-size:10px;letter-spacing:.07em;color:var(--dim);white-space:nowrap}
input[type=range]{
  -webkit-appearance:none;appearance:none;width:110px;height:2px;background:var(--line);border-radius:2px;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;width:13px;height:13px;border-radius:50%;background:var(--accent);cursor:pointer;
  box-shadow:0 0 12px rgba(124,231,255,.7)
}
input[type=range]::-moz-range-thumb{
  width:13px;height:13px;border:0;border-radius:50%;background:var(--accent);cursor:pointer
}

/* ---------- toast ---------- */
#toast{
  position:absolute;z-index:7;left:50%;top:clamp(64px,11vh,100px);transform:translateX(-50%);
  font-family:var(--mono);font-size:11.5px;letter-spacing:.07em;text-transform:uppercase;
  color:#05060a;background:var(--accent);padding:8px 16px;border-radius:999px;
  opacity:0;transition:opacity .3s;pointer-events:none;white-space:nowrap;
}
#toast.on{opacity:1}

/* ---------- essay ---------- */
#essay{
  max-width:660px;margin:0 auto;padding:clamp(48px,9vh,110px) 22px 90px;
  font-size:18px;line-height:1.62;color:#c9cfdb;
}
#essay h2{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--accent);margin:2.4em 0 .9em;font-weight:500;
}
#essay h2:first-child{margin-top:0}
#essay p{margin:0 0 1.15em}
#essay b{color:#fff;font-weight:600}
#essay i{color:#e6eaf2}
#essay .kicker{
  font-size:21px;line-height:1.5;color:#fff;border-left:2px solid var(--accent);
  padding-left:20px;margin:1.8em 0;
}
#essay a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(124,231,255,.35)}
#essay footer{
  margin-top:3.2em;padding-top:1.4em;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;color:var(--dim);
}

/* ---------- mobile ---------- */
@media (max-width:760px){
  #stage{height:100svh;min-height:520px}
  #brand h1{font-size:19px}
  #brand p{font-size:9px;letter-spacing:.09em}
  #panel{
    right:10px;left:10px;width:auto;top:auto;bottom:calc(clamp(16px,3.5vh,30px) + 118px);
    padding:14px 16px 12px;
  }
  #panel h2{font-size:16px}
  #panel p{font-size:13.5px;line-height:1.45}
  #panelNav{margin-top:12px}
  #freeplay{display:none}
  .ax-x{bottom:auto;top:58%}
  .ax-y{top:34%}
  button.primary{padding:11px 20px;font-size:11px}
  .dockRow{padding:6px 8px;gap:6px}
  .knob span{display:none}
  input[type=range]{width:84px}
  button.ghost{padding:6px 10px;font-size:9.5px}
  #essay{font-size:16.5px;padding-top:56px}
  #essay .kicker{font-size:18px}
}