:root{
  --bg:#04060a; --panel:#0b101acc; --line:#ffffff14; --txt:#cfd8e3; --dim:#7a8794;
  --acc:#ff6a3d; --acc2:#ffb347; --cyan:#4de3ff; --mono:'Consolas','SF Mono',monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{width:100%;height:100%;overflow:hidden;background:var(--bg);color:var(--txt);
  font-family:'Segoe UI','PingFang SC','Microsoft YaHei',system-ui,sans-serif;-webkit-font-smoothing:antialiased}
#gl{position:fixed;inset:0;width:100%;height:100%;display:block;touch-action:none;cursor:grab}
#gl:active{cursor:grabbing}
.hidden{display:none!important}

/* ---------- overlay ---------- */
.overlay{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(ellipse at 50% 40%,#0a1018 0%,#04060a 70%);backdrop-filter:blur(6px)}
.load-box{text-align:center;max-width:560px;padding:24px}
.load-title{font-family:var(--mono);font-size:34px;letter-spacing:10px;color:#fff;font-weight:700;
  text-shadow:0 0 24px #ff6a3d88}
.load-title.err{color:#ff5f5f}
.load-sub{margin-top:6px;color:var(--dim);font-size:13px;letter-spacing:3px}
.load-step{margin-top:26px;font-family:var(--mono);font-size:12px;color:var(--acc2);min-height:18px}
.load-bar{margin:14px auto 0;width:300px;height:3px;background:#ffffff14;border-radius:2px;overflow:hidden}
#load-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--acc),var(--acc2));transition:width .35s ease}
.load-detail{margin-top:10px;font-family:var(--mono);font-size:11px;color:var(--dim);white-space:pre-wrap}
.error-msg{margin-top:14px;max-height:220px;overflow:auto;text-align:left;background:#00000088;
  border:1px solid #ff5f5f33;border-radius:6px;padding:12px;font-family:var(--mono);font-size:11px;color:#ffb4b4;white-space:pre-wrap}
.btn-row{margin-top:18px;display:flex;gap:10px;justify-content:center}

/* ---------- buttons ---------- */
.btn{background:#ffffff0d;border:1px solid var(--line);color:var(--txt);border-radius:6px;
  padding:5px 12px;font-size:12px;cursor:pointer;transition:all .15s;font-family:inherit;white-space:nowrap}
.btn:hover{border-color:var(--acc);color:#fff;background:#ff6a3d1a}
.btn.on{background:var(--acc);border-color:var(--acc);color:#fff;box-shadow:0 0 12px #ff6a3d66}
.btn-dim{opacity:.65}
.btn-mini{padding:2px 7px;font-size:11px}
.btn-full{width:100%}

/* ---------- HUD ---------- */
.hud{position:fixed;inset:0;pointer-events:none;z-index:10}
.hud-top{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:flex-start;
  padding:14px 16px;gap:12px}
.hud-brand{display:flex;flex-direction:column;gap:2px}
.brand{font-family:var(--mono);font-size:20px;font-weight:700;letter-spacing:6px;color:#fff;
  text-shadow:0 0 18px #ff6a3d77}
.brand-sub{font-size:10px;letter-spacing:2.5px;color:var(--dim);text-transform:uppercase}
.hud-stats{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}
.stat{font-family:var(--mono);font-size:10.5px;color:var(--dim);background:#00000066;border:1px solid var(--line);
  border-radius:4px;padding:3px 8px;backdrop-filter:blur(3px)}
.stat.dbg{color:var(--cyan);border-color:#4de3ff33}
.hud-bottom{position:absolute;bottom:0;left:0;right:0;padding:10px 14px}
.hud-hints{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}
.hud-hints span{font-family:var(--mono);font-size:10px;color:#9aa7b3;background:#00000055;border:1px solid var(--line);
  border-radius:3px;padding:2px 7px;backdrop-filter:blur(2px)}

/* ---------- toolbar ---------- */
.toolbar{position:fixed;top:64px;right:14px;z-index:20;display:flex;flex-direction:column;gap:8px;align-items:flex-end}
.tb-group{display:flex;gap:6px;background:#00000055;padding:6px;border:1px solid var(--line);border-radius:8px;backdrop-filter:blur(6px)}
.tb-btn{font-size:11px;padding:4px 10px}

/* ---------- debug bar ---------- */
.dbgbar{position:fixed;left:50%;transform:translateX(-50%);bottom:44px;z-index:20;display:flex;align-items:center;gap:5px;
  background:#00000066;border:1px solid var(--line);border-radius:8px;padding:6px 9px;backdrop-filter:blur(6px)}
.dbg-label{font-family:var(--mono);font-size:10px;color:var(--dim);margin-right:4px}
.dbg-btn{font-family:var(--mono);font-size:11px;padding:3px 8px;min-width:26px}

/* ---------- panel ---------- */
.panel{position:fixed;top:0;right:0;bottom:0;width:300px;z-index:30;background:var(--panel);
  border-left:1px solid var(--line);backdrop-filter:blur(14px);display:flex;flex-direction:column;
  transform:translateX(0);transition:transform .28s ease}
.panel.closed{transform:translateX(105%)}
.panel-head{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;
  border-bottom:1px solid var(--line);font-size:13px;letter-spacing:2px;color:#fff}
.panel-body{flex:1;overflow-y:auto;padding:8px 14px 14px;scrollbar-width:thin}
.panel-foot{padding:10px 14px;border-top:1px solid var(--line)}
.panel-tab{position:fixed;top:50%;right:0;transform:translateY(-50%);z-index:31;background:var(--panel);
  border:1px solid var(--line);border-right:none;border-radius:8px 0 0 8px;color:var(--acc2);
  font-size:15px;padding:10px 6px;cursor:pointer;backdrop-filter:blur(6px)}
.panel.closed ~ .panel-tab{display:block}

/* ---------- source prompt ---------- */
.prompt-dialog{width:min(760px,calc(100vw - 28px));max-height:min(82dvh,720px);padding:0;border:1px solid #ffffff24;
  border-radius:8px;background:#070b12f5;color:var(--txt);box-shadow:0 24px 90px #000c}
.prompt-dialog::backdrop{background:#000c;backdrop-filter:blur(7px)}
.prompt-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 20px;border-bottom:1px solid var(--line)}
.prompt-head span{font:10px var(--mono);letter-spacing:2px;color:var(--acc)}
.prompt-head h2{margin-top:5px;font:600 17px var(--mono);letter-spacing:2px;color:#fff}
.prompt-dialog pre{max-height:58dvh;overflow:auto;padding:20px;white-space:pre-wrap;font:13px/1.8 system-ui,sans-serif;color:#d5dce5}
.prompt-foot{padding:12px 20px;border-top:1px solid var(--line);font:10px var(--mono);letter-spacing:1px;color:var(--dim)}

.psection{margin:12px 0 4px;font-size:11px;letter-spacing:2px;color:var(--acc2);border-bottom:1px solid #ffffff0d;padding-bottom:4px}
.psection:first-child{margin-top:6px}
.pslider{margin:9px 0}
.pslider-top{display:flex;justify-content:space-between;font-size:11.5px;margin-bottom:3px}
.pslider-name{color:#b9c4cf}
.pslider-val{font-family:var(--mono);color:var(--cyan);font-size:10.5px}
.pslider input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:3px;border-radius:2px;
  background:linear-gradient(90deg,#ff6a3d, #ffb347);outline:none;cursor:pointer}
.pslider input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:13px;height:13px;border-radius:50%;
  background:#fff;border:2px solid var(--acc);box-shadow:0 0 8px #ff6a3d88;cursor:pointer}
.pslider input[type=range]::-moz-range-thumb{width:11px;height:11px;border-radius:50%;background:#fff;
  border:2px solid var(--acc);cursor:pointer}
.pslider input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.15)}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%);z-index:60;background:#0b101aee;
  border:1px solid var(--acc);color:#fff;font-size:12px;padding:9px 18px;border-radius:8px;
  font-family:var(--mono);box-shadow:0 4px 24px #000a;animation:toastIn .25s ease}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(8px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}

/* ---------- responsive ---------- */
@media (max-width:760px){
  .hud-hints{display:none}
  .toolbar{top:auto;bottom:84px;left:10px;right:10px;flex-direction:row;flex-wrap:wrap;gap:5px;justify-content:center}
  .tb-group{gap:4px;padding:4px}
  .tb-btn{padding:3px 7px;font-size:10px}
  .dbgbar{bottom:auto;top:118px;flex-wrap:wrap;max-width:calc(100vw - 20px);justify-content:center}
  .panel{width:min(300px,88vw)}
  .brand{font-size:16px;letter-spacing:4px}
  .brand-sub{display:none}
  .hud-stats{flex-direction:column;align-items:flex-end}
  .prompt-dialog{width:calc(100vw - 12px);max-height:calc(100dvh - 12px)}
  .prompt-dialog pre{max-height:68dvh;padding:15px;font-size:12px}
}
@media (prefers-reduced-motion:reduce){
  .panel{transition:none}
}
/* silent 模式：隐藏所有 UI（自动化截图） */
body.silent #hud, body.silent #toolbar, body.silent #dbgbar, body.silent #panel, body.silent #panel-tab{display:none!important}
body.silent #gl{cursor:default}