/* ══════════════════════════════════════════════════════════════════
   KAIROGLYPH DIAL LAB — exploration surface for the layered astrolabe
   ══════════════════════════════════════════════════════════════════ */
:root {
  --void:#05050d; --paper:#efe7d5; --text:#ddd6c8; --dim:#9a92a6; --dim2:#575169;
  --gold:#c4a35a; --gold-bright:#d8bd72; --gold-deep:#8a6d2b;
  --lunar:#7d83e8; --lunar-bright:#a5b4fc; --ember:#d2603a; --ember-bright:#ef8b4a;
  --display:'Cinzel',Georgia,serif; --serif:'EB Garamond',Georgia,serif;
  --mono:'JetBrains Mono',ui-monospace,monospace; --sans:'Inter',system-ui,sans-serif;
  --ease:cubic-bezier(.65,.02,.22,1); --fire:0.45;
}
* { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; }
body {
  background:
    radial-gradient(ellipse 70% 55% at 50% 6%, #14132a 0%, transparent 55%),
    radial-gradient(ellipse 120% 80% at 50% 100%, #17122c 0%, transparent 62%),
    linear-gradient(180deg,#06060f,#05050d 60%,#04040a);
  color:var(--text); font-family:var(--serif); min-height:100vh;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
a { color:var(--gold); text-decoration:none; } a:hover { color:var(--gold-bright); }
.stars { position:fixed; inset:0; pointer-events:none; z-index:0; opacity:0.7;
  background:
    radial-gradient(1.4px 1.4px at 12% 22%, rgba(255,255,255,0.7), transparent),
    radial-gradient(1px 1px at 28% 68%, rgba(196,163,90,0.6), transparent),
    radial-gradient(1.2px 1.2px at 52% 14%, rgba(255,255,255,0.55), transparent),
    radial-gradient(1px 1px at 70% 50%, rgba(188,208,230,0.55), transparent),
    radial-gradient(1.3px 1.3px at 84% 30%, rgba(255,255,255,0.6), transparent),
    radial-gradient(1px 1px at 40% 88%, rgba(255,255,255,0.5), transparent);
  animation:tw 9s ease-in-out infinite alternate; }
@keyframes tw { from{opacity:.5} to{opacity:.82} }

.wrap { position:relative; z-index:2; width:min(1200px,92vw); margin:0 auto; padding:64px 0 90px; }
.lab-head { text-align:center; margin-bottom:14px; }
.eyebrow { font-family:var(--mono); font-size:0.62rem; letter-spacing:0.4em; text-transform:uppercase; color:var(--gold); }
.lab-head h1 { font-family:var(--display); font-weight:700; font-size:clamp(2rem,5vw,3.4rem); letter-spacing:0.05em; color:var(--paper); margin:14px 0 0; }
.lab-lead { font-family:var(--serif); font-size:clamp(1rem,1.6vw,1.24rem); color:var(--dim); max-width:60ch; margin:18px auto 0; line-height:1.55; text-align:center; }
.lab-lead em { color:var(--gold-bright); font-style:italic; }

.lab-main { display:grid; grid-template-columns:1.15fr 0.85fr; gap:clamp(30px,5vw,64px); align-items:center; margin-top:52px; }
@media (max-width:860px){ .lab-main { grid-template-columns:1fr; } }

/* dial card */
.dial-card { position:relative; aspect-ratio:1; width:100%; max-width:600px; margin:0 auto; display:grid; place-items:center; }
.dial-card::before { content:""; position:absolute; inset:2%; border-radius:50%; pointer-events:none;
  background:radial-gradient(circle at 50% 54%, rgba(239,139,74,0.85), rgba(210,96,58,0.32) 30%, transparent 62%);
  opacity:calc(var(--fire)*0.5); filter:blur(16px); mix-blend-mode:screen;
  animation:emberFl 5.5s ease-in-out infinite alternate; }
@keyframes emberFl { from{opacity:calc(var(--fire)*0.34);transform:scale(.98)} to{opacity:calc(var(--fire)*0.62);transform:scale(1.03)} }
#dial { position:relative; z-index:2; width:100%; }

/* KGDial layer chrome */
.kgd-stage { position:relative; width:100%; aspect-ratio:1; }
.kgd-layer { position:absolute; inset:0; transform-origin:50% 50%; will-change:transform; }
.kgd-svg { width:100%; height:100%; display:block; }
.kgd-deg { z-index:6; } .kgd-zod { z-index:5; } .kgd-zhi { z-index:5; opacity:0; mix-blend-mode:screen; pointer-events:none; } .kgd-geo { z-index:4; }
.kgd-seal { z-index:7; opacity:0; } .kgd-core { z-index:8; }
.kgd-core .kgd-svg { filter:drop-shadow(0 0 18px rgba(0,0,0,0.55)); }
.kgd-zhi.go { animation:zhiPulse 2.6s ease-out; }
@keyframes zhiPulse { 0%{opacity:0} 14%{opacity:0.95} 55%{opacity:0.5} 100%{opacity:0} }
.kgd-core.pulse { animation:corePulse 700ms ease-out; }
@keyframes corePulse { 0%{transform:scale(1)} 35%{transform:scale(1.08)} 100%{transform:scale(1)} }
.kgd-ptr { position:absolute; width:0; height:0; z-index:11; filter:drop-shadow(0 0 4px rgba(216,189,114,0.8)); }
.kgd-ptr--top { top:0.4%; left:50%; transform:translateX(-50%); border-left:7px solid transparent; border-right:7px solid transparent; border-top:13px solid var(--gold-bright); }
.kgd-ptr--bottom { bottom:0.4%; left:50%; transform:translateX(-50%); border-left:7px solid transparent; border-right:7px solid transparent; border-bottom:13px solid var(--gold-bright); }
.kgd-ptr--left { left:0.4%; top:50%; transform:translateY(-50%); border-top:7px solid transparent; border-bottom:7px solid transparent; border-left:13px solid var(--gold-bright); }
.kgd-ptr--right { right:0.4%; top:50%; transform:translateY(-50%); border-top:7px solid transparent; border-bottom:7px solid transparent; border-right:13px solid var(--gold-bright); }
.kgd-drop { position:absolute; left:50%; top:50%; width:22px; height:32px; margin:-16px 0 0 -11px; opacity:0; z-index:12; pointer-events:none; filter:drop-shadow(0 0 6px rgba(216,189,114,0.85)); }
.kgd-drop svg { width:100%; height:100%; display:block; }
.kgd-drop.go { animation:kgdDrop 900ms cubic-bezier(.5,.08,.3,1) forwards; }
@keyframes kgdDrop { 0%{opacity:0;transform:translateY(-270px) scale(.7)} 18%{opacity:1} 80%{transform:translateY(0) scale(1);opacity:1} 100%{transform:translateY(0) scale(.3);opacity:0} }
.kgd-flash { position:absolute; left:50%; top:50%; width:72%; aspect-ratio:1; transform:translate(-50%,-50%) scale(0.3);
  border-radius:50%; opacity:0; z-index:9; pointer-events:none; mix-blend-mode:screen;
  background:radial-gradient(circle, rgba(255,249,235,0.95), rgba(239,139,74,0.5) 34%, transparent 66%); }
.kgd-flash.go { animation:kgdFlash 1000ms cubic-bezier(.2,.6,.2,1); }
@keyframes kgdFlash { 0%{opacity:0;transform:translate(-50%,-50%) scale(.25)} 20%{opacity:1;transform:translate(-50%,-50%) scale(.9)} 100%{opacity:0;transform:translate(-50%,-50%) scale(1.6)} }
.kgd-seal.go { animation:kgdSeal 3400ms ease-out; }
@keyframes kgdSeal { 0%{opacity:0;transform:scale(.82)} 9%{opacity:.95;transform:scale(1.02)} 78%{opacity:.72;transform:scale(1)} 100%{opacity:0;transform:scale(1.04)} }

/* controls */
.panel { display:flex; flex-direction:column; gap:22px; }
.pgroup { display:flex; flex-direction:column; gap:10px; }
.plabel { font-family:var(--mono); font-size:0.58rem; letter-spacing:0.22em; text-transform:uppercase; color:var(--dim); display:flex; justify-content:space-between; }
.plabel b { color:var(--gold); font-weight:500; }
.seg { display:flex; gap:6px; }
.seg button { flex:1; padding:11px 8px; background:rgba(255,255,255,0.03); border:1px solid rgba(196,163,90,0.2); border-radius:3px;
  color:var(--dim); font-family:var(--mono); font-size:0.6rem; letter-spacing:0.08em; text-transform:uppercase; cursor:pointer; transition:all .25s ease;
  display:flex; flex-direction:column; align-items:center; gap:4px; }
.seg button .sub { font-size:0.5rem; letter-spacing:0.04em; color:var(--dim2); text-transform:none; }
.seg button:hover { color:var(--text); border-color:rgba(196,163,90,0.35); }
.seg button.on { background:rgba(196,163,90,0.15); border-color:rgba(196,163,90,0.5); color:var(--gold-bright); }
.seg button.on .sub { color:var(--gold-deep); }
.trigger { padding:14px; background:linear-gradient(180deg,var(--gold-bright),var(--gold)); border:0; border-radius:3px; cursor:pointer;
  font-family:var(--mono); font-size:0.66rem; letter-spacing:0.18em; text-transform:uppercase; color:#140d04;
  box-shadow:0 10px 28px rgba(196,163,90,0.28); transition:transform .25s ease, box-shadow .25s ease; }
.trigger:hover { transform:translateY(-2px); box-shadow:0 14px 34px rgba(196,163,90,0.4); }
input[type=range] { -webkit-appearance:none; appearance:none; width:100%; height:3px; background:rgba(196,163,90,0.25); border-radius:3px; outline:none; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance:none; width:15px; height:15px; border-radius:50%; background:var(--gold-bright); cursor:pointer; box-shadow:0 0 8px rgba(216,189,114,0.6); }
input[type=range]::-moz-range-thumb { width:15px; height:15px; border:0; border-radius:50%; background:var(--gold-bright); cursor:pointer; }

/* layer legend */
.legend { margin-top:64px; display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:1px; background:rgba(196,163,90,0.16); border:1px solid rgba(196,163,90,0.16); }
.legend-cell { background:linear-gradient(180deg,#0d0d1a,#08080f); padding:24px 22px; }
.legend-cell .n { font-family:var(--mono); font-size:0.54rem; letter-spacing:0.24em; text-transform:uppercase; color:var(--gold-deep); }
.legend-cell h3 { font-family:var(--display); font-size:1.06rem; font-weight:600; color:var(--paper); margin:9px 0 8px; }
.legend-cell p { font-size:0.96rem; line-height:1.5; color:var(--dim); }
.legend-cell p b { color:var(--gold); font-weight:600; }

.backlink { display:inline-flex; align-items:center; gap:8px; margin-top:40px; font-family:var(--mono); font-size:0.58rem; letter-spacing:0.2em; text-transform:uppercase; color:var(--dim); }
.backlink:hover { color:var(--gold-bright); }

@media (prefers-reduced-motion:reduce){ * { animation:none !important; } }