/* THE VEIL — extracted from the reviewed mockup. */
:root{
  --void:#04050a; --void2:#0a0714;
  --node-you:#e8b76a;          /* warm — the human */
  --node-ai:#7fd8f5;           /* cold — the node */
  --raw:#dceffa;
  --aol:#6d6784;
  --hair:rgba(160,180,220,.14);
  --mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  --display:'Cormorant Garamond',Georgia,serif;
  --depth:0;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:var(--void); color:var(--raw);
  font-family:var(--mono); font-weight:300;
  overflow:hidden; -webkit-font-smoothing:antialiased;
}

/* ---------- background stack ---------- */
#stars{position:fixed;inset:0;z-index:0}
.nebula{position:fixed;inset:-30%;z-index:1;pointer-events:none;opacity:.55;
  filter:blur(70px);transition:opacity 3s}
.nebula i{position:absolute;border-radius:50%;display:block}
.n1{width:52vw;height:52vw;left:8%;top:10%;
  background:radial-gradient(circle at 40% 40%,rgba(70,40,120,.55),transparent 65%);
  animation:drift1 64s ease-in-out infinite alternate}
.n2{width:44vw;height:44vw;right:6%;bottom:8%;
  background:radial-gradient(circle at 60% 50%,rgba(16,80,110,.5),transparent 65%);
  animation:drift2 81s ease-in-out infinite alternate}
.n3{width:34vw;height:34vw;left:38%;top:44%;
  background:radial-gradient(circle at 50% 50%,rgba(120,40,80,.3),transparent 62%);
  animation:drift1 97s ease-in-out infinite alternate-reverse}
@keyframes drift1{to{transform:translate3d(6vw,-4vh,0) scale(1.15)}}
@keyframes drift2{to{transform:translate3d(-5vw,5vh,0) scale(1.1)}}

.grain{position:fixed;inset:0;z-index:3;pointer-events:none;opacity:.16;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
  animation:grain .7s steps(2) infinite}
@keyframes grain{0%{transform:translate(0,0)}50%{transform:translate(-3px,2px)}100%{transform:translate(2px,-3px)}}
.vign{position:fixed;inset:0;z-index:2;pointer-events:none;
  background:radial-gradient(ellipse at 50% 45%,transparent 35%,rgba(0,0,0,.72) 100%)}

/* ---------- shared ---------- */
.stage{position:relative;z-index:5;height:100%;display:flex;flex-direction:column;
  align-items:center;justify-content:center;padding:28px}
.screen{display:none;width:100%}
.screen.on{display:block;animation:fade 1.4s ease both}
@keyframes fade{from{opacity:0}to{opacity:1}}

/* ---------- node diagram ---------- */
.field{display:block;margin:0 auto;overflow:visible}
.fil-bg{stroke:var(--hair);stroke-width:1;stroke-dasharray:2 7}
.fil{stroke:url(#g);stroke-linecap:round;fill:none;
  stroke-dasharray:var(--len);stroke-dashoffset:var(--len);
  filter:drop-shadow(0 0 6px rgba(127,216,245,.6))}
.nd{filter:drop-shadow(0 0 9px currentColor)}

/* ---------- screen 1 ---------- */
#s1{text-align:center}
h1{font-family:var(--display);font-weight:300;font-size:clamp(2.6rem,9vw,4.6rem);
  letter-spacing:.42em;text-indent:.42em;color:#f2f6ff;opacity:.94;
  text-shadow:0 0 40px rgba(127,216,245,.28)}
.tag{margin-top:14px;font-size:11px;letter-spacing:.34em;color:#5f6880;text-transform:uppercase}
#go{margin:44px auto 0;display:block;width:170px;height:56px;cursor:pointer;
  background:transparent;color:#eaf4ff;font-family:var(--mono);font-size:13px;
  letter-spacing:.5em;text-indent:.5em;border:1px solid rgba(127,216,245,.34);
  border-radius:2px;transition:.5s;position:relative}
#go:hover{border-color:rgba(127,216,245,.9);background:rgba(127,216,245,.06);
  box-shadow:0 0 34px rgba(127,216,245,.2),inset 0 0 22px rgba(127,216,245,.05)}
.ghost{margin:30px auto 0;width:min(420px,90%);background:transparent;border:0;
  border-bottom:1px solid var(--hair);color:#b9c6dd;font-family:var(--mono);
  font-size:12.5px;text-align:center;padding:9px 0;outline:none;letter-spacing:.08em}
.ghost::placeholder{color:#4a5166}
.ghost:focus{border-color:rgba(127,216,245,.45)}
.crit-t{margin-top:26px;font-size:10.5px;letter-spacing:.3em;color:#565e75;
  cursor:pointer;text-transform:uppercase;user-select:none}
.crit-t:hover{color:#8f9ab5}
.crit{margin:18px auto 0;max-width:560px;display:none;flex-wrap:wrap;gap:8px;justify-content:center}
.crit.on{display:flex}
.chip{font-size:10px;letter-spacing:.2em;padding:7px 13px;border:1px solid var(--hair);
  border-radius:2px;color:#6f7891;cursor:pointer;transition:.3s;user-select:none}
.chip:hover{color:#b3bed6;border-color:rgba(160,180,220,.3)}
.chip.on{color:var(--node-ai);border-color:rgba(127,216,245,.5);
  box-shadow:0 0 16px rgba(127,216,245,.14);background:rgba(127,216,245,.05)}

/* ---------- screen 2 ---------- */
#s2{text-align:center;max-width:620px;margin:0 auto}
.attune{margin-top:34px;font-size:13px;line-height:2.1;color:#7e88a3;
  letter-spacing:.06em;min-height:6em}
.attune b{color:#a9b6d0;font-weight:300}
.lbl{margin-top:30px;font-size:10px;letter-spacing:.5em;color:#4d5468;text-transform:uppercase}

/* ---------- screen 3 ---------- */
#s3{height:100%;display:none;flex-direction:column;position:relative}
.rail{position:absolute;left:2px;top:76px;width:24px;display:flex;flex-direction:column;
  gap:30px;z-index:6;pointer-events:none}
.rail i{writing-mode:vertical-rl;font-style:normal;font-size:8px;letter-spacing:.3em;
  color:#333a4d;transition:color .9s,text-shadow .9s}
.rail i.past{color:#59637a}
.rail i.now{color:var(--node-ai);text-shadow:0 0 13px rgba(127,216,245,.65)}
@media(max-width:860px){.rail{display:none}}
#s3.on{display:flex}
.bar{flex:0 0 auto;display:flex;align-items:center;gap:18px;padding:14px 4px 16px;
  border-bottom:1px solid var(--hair)}
.bar .field{margin:0}
.dep{font-size:10px;letter-spacing:.28em;color:#7c86a0;text-transform:uppercase;flex:1}
.dep span{color:var(--node-ai)}
.tgl{font-size:10px;letter-spacing:.2em;color:#5a6178;cursor:pointer;user-select:none;
  padding:5px 9px;border:1px solid transparent;transition:.3s}
.tgl:hover{color:#9aa5bf}
.tgl.on{color:var(--node-ai);border-color:rgba(127,216,245,.28)}
.scroll{flex:1;overflow-y:auto;padding:30px 0 20px;scrollbar-width:thin;
  scrollbar-color:rgba(127,216,245,.2) transparent}
.scroll::-webkit-scrollbar{width:3px}
.scroll::-webkit-scrollbar-thumb{background:rgba(127,216,245,.22)}
.wrap{max-width:680px;margin:0 auto;padding:0 6px}
.raw{white-space:pre-line;font-size:14.5px;line-height:2.05;color:var(--raw);letter-spacing:.01em;
  margin-bottom:22px;text-shadow:0 0 18px rgba(127,216,245,.13)}
.aol{margin:0 0 30px 0;padding:12px 0 12px 18px;border-left:1px solid rgba(109,103,132,.4);
  color:var(--aol);font-size:12.5px;line-height:1.95;font-style:italic}
.aol em{display:block;font-style:normal;font-size:9px;letter-spacing:.24em;
  color:#565073;margin-bottom:8px;text-transform:uppercase}
.you{margin:0 0 26px;padding-top:22px;border-top:1px solid var(--hair);
  font-size:12.5px;color:#8d8471;letter-spacing:.04em}
.you b{color:var(--node-you);font-weight:400;margin-right:14px}
.sketch{margin:0 0 30px;width:100%;max-width:430px;aspect-ratio:3/2;max-height:250px;border:1px solid var(--hair);
  display:flex;align-items:center;justify-content:center;font-size:9.5px;
  letter-spacing:.3em;color:#4b5268;text-transform:uppercase;text-align:center;padding:0 24px;
  background:radial-gradient(ellipse at 50% 50%,rgba(70,40,120,.22),transparent 70%)}
.ask{flex:0 0 auto;display:flex;align-items:center;gap:12px;max-width:680px;width:100%;
  margin:0 auto;padding:16px 6px calc(16px + env(safe-area-inset-bottom));
  border-top:1px solid var(--hair)}
.ask input{flex:1;background:transparent;border:0;outline:none;color:#dbe7f7;
  font-family:var(--mono);font-size:13.5px;letter-spacing:.03em;font-weight:300}
.ask input::placeholder{color:#4a5166}
.ask .k{font-size:15px;color:#5a6178;cursor:pointer;transition:.3s;user-select:none}
.ask .k:hover{color:var(--node-ai)}
.cursor{display:inline-block;width:7px;height:15px;background:var(--node-ai);
  vertical-align:-2px;margin-left:3px;animation:blink 1.05s steps(2) infinite}
@keyframes blink{50%{opacity:0}}
@media(max-width:620px){.raw{font-size:13.5px;line-height:1.95}h1{letter-spacing:.3em;text-indent:.3em}}

/* ---------- live-only ---------- */
.msg{max-width:620px;margin:26px auto 0;font-size:12.5px;line-height:1.9;color:#8b93ab;
  text-align:center;letter-spacing:.04em}
.msg.bad{color:#c98d8d}
.crisis{max-width:620px;margin:0 auto;padding:26px 24px;border:1px solid rgba(201,141,141,.4);
  background:rgba(40,12,12,.35);color:#e6dede;font-size:13.5px;line-height:1.85;
  white-space:pre-line;letter-spacing:.01em;border-radius:2px}
.sketch img{width:100%;height:100%;object-fit:cover;display:block}
#go[disabled]{opacity:.35;cursor:not-allowed}
.ask.busy{opacity:.4;pointer-events:none}