:root{
  --bg:#050506;
  --text:#ece9e3;
  --muted:#9b968d;
  --dim:#6d6a64;
  --accent:#ffb26b;
  --accent-2:#ff8a3d;
  --line:rgba(255,255,255,.085);
  --line-strong:rgba(255,255,255,.16);
  --font:"Inter","SF Pro Display",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SFMono-Regular",ui-monospace,Menlo,Consolas,"Liberation Mono",monospace;
  --radius:18px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  user-select:none;
}
button{font-family:inherit;color:inherit}
#stage{
  position:fixed;
  inset:0;
  display:block;
  width:100%;
  height:100%;
  touch-action:none;
  cursor:grab;
  background:#000;
}
#stage.is-dragging{cursor:grabbing}

/* ---------- cinematic bars ---------- */
.letterbox{
  position:fixed;
  left:0;right:0;
  height:0;
  background:#000;
  z-index:4;
  pointer-events:none;
  transition:height .65s cubic-bezier(.22,1,.36,1);
}
.letterbox--top{top:0;box-shadow:0 1px 0 rgba(255,255,255,.045)}
.letterbox--bottom{bottom:0;box-shadow:0 -1px 0 rgba(255,255,255,.045)}
body.letterbox-on .letterbox{height:7.2vh}

/* ---------- HUD ---------- */
.hud{
  position:fixed;
  top:0;left:0;
  z-index:6;
  padding:clamp(22px,3.4vw,44px);
  max-width:70vw;
  pointer-events:none;
  transition:opacity .5s ease, transform .5s ease;
  text-shadow:0 2px 30px rgba(0,0,0,.65);
}
.hud__eyebrow{
  margin:0 0 12px;
  font-size:9px;
  font-weight:500;
  letter-spacing:.36em;
  color:rgba(255,178,107,.68);
}
.hud h1{
  margin:0;
  font-size:clamp(22px,3.2vw,40px);
  font-weight:200;
  letter-spacing:.24em;
  line-height:1;
  color:#f3efe7;
}
.hud h1 span{
  margin-left:.55em;
  font-size:.38em;
  font-weight:300;
  letter-spacing:.34em;
  color:var(--muted);
  vertical-align:middle;
  text-shadow:none;
}
.hud__readout{
  display:flex;
  gap:clamp(16px,2.4vw,34px);
  margin:22px 0 0;
}
.hud__readout dt{
  font-size:8px;
  letter-spacing:.3em;
  color:var(--dim);
}
.hud__readout dd{
  margin:5px 0 0;
  font-size:11.5px;
  letter-spacing:.06em;
  color:#d6d1c8;
  font-variant-numeric:tabular-nums;
  font-feature-settings:"tnum";
}

/* ---------- panel toggle ---------- */
.panel-toggle{
  position:fixed;
  top:22px;right:22px;
  z-index:14;
  width:42px;height:42px;
  padding:0;
  display:grid;place-items:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(14,14,18,.62);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:scale(.85);
  transition:opacity .35s, transform .35s, visibility .35s, border-color .2s, background .2s;
}
.panel-toggle svg{
  width:20px;height:20px;
  fill:none;
  stroke:#e8e2d8;
  stroke-width:1.4;
  stroke-linecap:round;
}
.panel-toggle:hover{border-color:rgba(255,178,107,.55);background:rgba(255,178,107,.1)}
body.ui-hidden .panel-toggle{opacity:1;visibility:visible;transform:scale(1)}
body.ui-hidden .hud{opacity:0;transform:translateY(-10px)}
body.ui-hidden .hint{opacity:0}

/* ---------- panel ---------- */
.panel{
  position:fixed;
  top:20px;right:20px;bottom:20px;
  width:338px;
  z-index:12;
  display:flex;
  flex-direction:column;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:
    radial-gradient(120% 60% at 100% 0%, rgba(255,150,70,.075), transparent 60%),
    linear-gradient(180deg, rgba(20,20,25,.74), rgba(9,9,12,.82));
  backdrop-filter:blur(22px) saturate(135%);
  -webkit-backdrop-filter:blur(22px) saturate(135%);
  box-shadow:0 32px 90px rgba(0,0,0,.66), inset 0 1px 0 rgba(255,255,255,.055);
  overflow:hidden;
  transition:transform .55s cubic-bezier(.22,1,.36,1), opacity .4s ease;
  will-change:transform;
}
.panel.is-hidden{
  transform:translateX(calc(100% + 40px));
  opacity:0;
  pointer-events:none;
}
.panel__head{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:18px 18px 15px;
  border-bottom:1px solid var(--line);
}
.panel__brand{display:flex;align-items:center;gap:12px}
.panel__logo{
  position:relative;
  width:24px;height:24px;
  border-radius:50%;
  background:radial-gradient(circle at 50% 50%, #000 0 34%, var(--accent) 35%, #ff7a2f 46%, rgba(255,122,47,0) 72%);
  box-shadow:0 0 22px rgba(255,138,60,.4);
  flex:0 0 auto;
}
.panel__logo::after{
  content:"";
  position:absolute;
  inset:-4px -9px;
  border-radius:50%;
  border:1px solid rgba(255,178,107,.38);
  transform:rotate(-22deg) scaleY(.34);
}
.panel__brand h2{
  margin:0;
  font-size:12px;
  font-weight:500;
  letter-spacing:.22em;
  color:#efe9df;
}
.panel__brand p{
  margin:4px 0 0;
  font-size:7.5px;
  letter-spacing:.26em;
  color:var(--dim);
}
.ghost-btn{
  padding:6px 10px;
  font-size:10px;
  letter-spacing:.18em;
  color:var(--muted);
  background:transparent;
  border:1px solid var(--line);
  border-radius:7px;
  cursor:pointer;
  transition:.2s;
}
.ghost-btn:hover{color:#ffd9b0;border-color:rgba(255,178,107,.4);background:rgba(255,178,107,.07)}

.panel__scroll{
  flex:1 1 auto;
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:6px 18px 18px;
  scrollbar-width:thin;
  scrollbar-color:rgba(255,255,255,.16) transparent;
}
.panel__scroll::-webkit-scrollbar{width:5px}
.panel__scroll::-webkit-scrollbar-track{background:transparent}
.panel__scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:4px}
.panel__scroll::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.24)}

.group{padding:15px 0 3px}
.group + .group{border-top:1px solid rgba(255,255,255,.055)}
.group__head{display:flex;align-items:baseline;justify-content:space-between;margin:0 0 6px}
.group__head h3{
  margin:0;
  font-size:10.5px;
  font-weight:500;
  letter-spacing:.24em;
  color:#cfc9bf;
}
.group__head span{
  font-size:7.5px;
  letter-spacing:.24em;
  color:var(--dim);
}

/* presets */
.presets{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:7px;
  padding:4px 0 8px;
}
.preset{
  padding:9px 11px;
  text-align:left;
  border:1px solid var(--line);
  border-radius:9px;
  background:rgba(255,255,255,.018);
  font-size:11.5px;
  letter-spacing:.04em;
  color:#c9c4bb;
  cursor:pointer;
  transition:border-color .2s, background .2s, color .2s, box-shadow .2s;
}
.preset small{
  display:block;
  margin-top:3px;
  font-size:7.5px;
  letter-spacing:.16em;
  color:var(--dim);
  transition:color .2s;
}
.preset:hover{
  color:#fff;
  border-color:rgba(255,178,107,.4);
  background:rgba(255,178,107,.07);
}
.preset.is-active{
  color:#ffd9b0;
  border-color:rgba(255,178,107,.6);
  background:rgba(255,178,107,.1);
  box-shadow:inset 0 0 22px rgba(255,140,60,.09);
}
.preset.is-active small{color:rgba(255,190,130,.7)}

/* controls */
.ctrl{padding:9px 0}
.ctrl__top{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:8px}
.ctrl label{font-size:12px;letter-spacing:.02em;color:#d8d3ca}
.ctrl label em{
  font-style:normal;
  margin-left:6px;
  font-size:8px;
  letter-spacing:.18em;
  color:var(--dim);
  text-transform:uppercase;
}
.ctrl output{
  font-family:var(--mono);
  font-size:10.5px;
  color:var(--accent);
  letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}
input[type="range"]{
  -webkit-appearance:none;
  appearance:none;
  display:block;
  width:100%;
  height:14px;
  margin:0;
  background:transparent;
  cursor:pointer;
}
input[type="range"]::-webkit-slider-runnable-track{
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg, rgba(255,150,70,.95) 0%, var(--accent) var(--p,50%), rgba(255,255,255,.12) var(--p,50%), rgba(255,255,255,.12) 100%);
}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance:none;
  width:11px;height:11px;
  margin-top:-4.5px;
  border-radius:50%;
  border:none;
  background:#ffd3a2;
  box-shadow:0 0 0 3px rgba(255,178,107,.13), 0 0 13px rgba(255,132,52,.6);
  transition:transform .15s ease, box-shadow .15s ease;
}
input[type="range"]:hover::-webkit-slider-thumb{
  transform:scale(1.18);
  box-shadow:0 0 0 5px rgba(255,178,107,.14), 0 0 20px rgba(255,132,52,.75);
}
input[type="range"]:focus-visible{outline:none}
input[type="range"]:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 5px rgba(255,178,107,.26), 0 0 22px rgba(255,132,52,.85)}
input[type="range"]::-moz-range-track{height:2px;border-radius:2px;background:rgba(255,255,255,.12)}
input[type="range"]::-moz-range-progress{height:2px;border-radius:2px;background:linear-gradient(90deg,#ff9646,var(--accent))}
input[type="range"]::-moz-range-thumb{
  width:11px;height:11px;border:none;border-radius:50%;
  background:#ffd3a2;
  box-shadow:0 0 0 3px rgba(255,178,107,.13), 0 0 13px rgba(255,132,52,.6);
}

.switch{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:10px 0;
  cursor:pointer;
}
.switch__label{order:1;font-size:12px;letter-spacing:.02em;color:#d8d3ca}
.switch__hint{display:block;margin-top:3px;font-size:8px;letter-spacing:.12em;color:var(--dim)}
.switch input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.switch__track{
  order:2;
  position:relative;
  flex:0 0 auto;
  width:34px;height:18px;
  border-radius:20px;
  border:1px solid rgba(255,255,255,.11);
  background:rgba(255,255,255,.07);
  transition:background .25s, border-color .25s;
}
.switch__track i{
  position:absolute;
  top:2px;left:2px;
  width:12px;height:12px;
  border-radius:50%;
  background:#8d8981;
  transition:left .25s cubic-bezier(.3,1.4,.5,1), background .25s, box-shadow .25s;
}
.switch input:checked + .switch__track{
  background:rgba(255,138,61,.2);
  border-color:rgba(255,178,107,.48);
}
.switch input:checked + .switch__track i{
  left:18px;
  background:var(--accent);
  box-shadow:0 0 10px rgba(255,150,70,.85);
}
.switch input:focus-visible + .switch__track{outline:1px solid rgba(255,178,107,.7);outline-offset:2px}

.select-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:9px 0}
.select-row label{font-size:12px;color:#d8d3ca}
select{
  appearance:none;
  -webkit-appearance:none;
  padding:6px 26px 6px 10px;
  font-family:inherit;
  font-size:11px;
  color:#e7e1d7;
  background:
    linear-gradient(45deg, transparent 50%, #a49f96 50%) calc(100% - 13px) 50%/4px 4px no-repeat,
    linear-gradient(135deg, #a49f96 50%, transparent 50%) calc(100% - 9px) 50%/4px 4px no-repeat,
    rgba(255,255,255,.045);
  border:1px solid var(--line);
  border-radius:7px;
  cursor:pointer;
  outline:none;
  transition:.2s;
}
select:hover{border-color:rgba(255,178,107,.4)}
select option{background:#141418;color:#e7e1d7}

.note{
  margin:6px 0 0;
  font-size:9.5px;
  line-height:1.75;
  letter-spacing:.04em;
  color:var(--dim);
}

/* footer */
.panel__foot{
  flex:0 0 auto;
  padding:13px 18px 15px;
  border-top:1px solid var(--line);
  background:rgba(5,5,7,.4);
}
.panel__stats{
  display:flex;
  justify-content:space-between;
  gap:8px;
  margin-bottom:11px;
}
.stat{display:flex;flex-direction:column;gap:3px}
.stat span{font-size:7.5px;letter-spacing:.22em;color:var(--dim)}
.stat b{
  font-family:var(--mono);
  font-size:10.5px;
  font-weight:400;
  color:#cfc9bf;
  font-variant-numeric:tabular-nums;
}
.panel__actions{display:grid;grid-template-columns:1fr 1fr 1fr;gap:7px}
.action-btn{
  padding:8px 4px;
  font-size:10.5px;
  letter-spacing:.12em;
  color:#c9c4bb;
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  border-radius:8px;
  cursor:pointer;
  transition:.2s;
}
.action-btn:hover{color:#fff;background:rgba(255,255,255,.07);border-color:var(--line-strong)}
.action-btn--accent{color:#ffd0a0;border-color:rgba(255,178,107,.32);background:rgba(255,138,61,.09)}
.action-btn--accent:hover{background:rgba(255,138,61,.18);border-color:rgba(255,178,107,.55)}

/* hint */
.hint{
  position:fixed;
  left:50%;bottom:calc(7.2vh + 18px);
  z-index:6;
  transform:translateX(-50%);
  display:flex;align-items:center;gap:9px;
  padding:8px 16px;
  border-radius:99px;
  border:1px solid rgba(255,255,255,.08);
  background:rgba(8,8,11,.5);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  font-size:10.5px;
  letter-spacing:.1em;
  color:rgba(235,230,220,.55);
  pointer-events:none;
  transition:opacity .8s ease;
  white-space:nowrap;
}
.hint__dot{
  width:5px;height:5px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 9px rgba(255,150,70,.9);
  animation:pulse 2.4s ease-in-out infinite;
}
.hint.is-gone{opacity:0}
@keyframes pulse{0%,100%{opacity:.35;transform:scale(.8)}50%{opacity:1;transform:scale(1.15)}}

/* loader */
.loader{
  position:fixed;inset:0;z-index:50;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  background:radial-gradient(circle at 50% 46%, #0d0b09 0%, #050506 62%);
  transition:opacity .9s ease, visibility .9s;
}
.loader.is-done{opacity:0;visibility:hidden}
.loader__ring{
  position:relative;
  width:62px;height:62px;margin-bottom:30px;
  border-radius:50%;
  border:1px solid rgba(255,178,107,.16);
}
.loader__ring::before{
  content:"";
  position:absolute;inset:-1px;
  border-radius:50%;
  border:1px solid transparent;
  border-top-color:rgba(255,167,97,.95);
  border-right-color:rgba(255,120,40,.28);
  animation:spin 1.25s linear infinite;
  filter:drop-shadow(0 0 7px rgba(255,140,60,.6));
}
.loader__ring span{
  position:absolute;inset:18px;
  border-radius:50%;
  background:#000;
  box-shadow:0 0 26px 8px rgba(255,138,60,.35), inset 0 0 16px rgba(255,138,60,.45);
}
@keyframes spin{to{transform:rotate(360deg)}}
.loader__title{margin:0;font-size:13px;letter-spacing:.36em;color:#efe7dc;font-weight:300}
.loader__sub{margin:9px 0 26px;font-size:7.5px;letter-spacing:.34em;color:#6a6660}
.loader__bar{width:min(300px,62vw);height:1px;background:rgba(255,255,255,.1);overflow:hidden}
.loader__bar i{
  display:block;height:100%;width:0%;
  background:linear-gradient(90deg,rgba(255,120,40,.3),#ffc38a);
  box-shadow:0 0 12px rgba(255,150,70,.9);
  transition:width .25s ease;
}
.loader__pct{margin:13px 0 0;font-family:var(--mono);font-size:9px;letter-spacing:.3em;color:#7d7870}

/* fatal */
.fatal[hidden]{display:none}
.fatal{
  position:fixed;inset:0;z-index:60;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:14px;padding:30px;text-align:center;
  background:#08080a;
}
.fatal h2{margin:0;font-weight:300;letter-spacing:.12em;font-size:20px}
.fatal p{margin:0;max-width:460px;font-size:12.5px;line-height:1.8;color:var(--muted)}

/* toast */
.toast{
  position:fixed;
  left:50%;top:26px;
  transform:translate(-50%,-14px);
  z-index:40;
  padding:9px 18px;
  border-radius:99px;
  border:1px solid rgba(255,178,107,.3);
  background:rgba(20,14,10,.82);
  backdrop-filter:blur(10px);
  font-size:11px;
  letter-spacing:.08em;
  color:#ffd6ab;
  opacity:0;
  pointer-events:none;
  transition:opacity .35s ease, transform .35s ease;
}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hud{max-width:none}
  .hud__readout{display:none}
  .panel{
    top:auto;left:10px;right:10px;bottom:10px;
    width:auto;
    max-height:52vh;
    border-radius:16px;
  }
  .panel.is-hidden{transform:translateY(calc(100% + 24px))}
  .hint{display:none}
  .panel-toggle{top:auto;bottom:24px;right:18px}
  body.letterbox-on .letterbox{height:0}
}
@media (max-width:520px){
  .hud__eyebrow{font-size:7.5px;letter-spacing:.26em}
  .hud h1{letter-spacing:.16em}
  .panel{max-height:56vh}
  .presets{grid-template-columns:1fr 1fr}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s !important;transition-duration:.001s !important}
}