:root{
  --bg:#0f1319; --panel:rgba(16,20,27,.82); --line:rgba(255,255,255,.08);
  --txt:#e6ebf4; --sub:#8b98ab; --acc:#4f8cff; --tbh:60px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; overflow:hidden; background:var(--bg); color:var(--txt);
  font:13px/1.5 "Segoe UI",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  display:flex; flex-direction:column;
}
button{font-family:inherit}
#viewport{position:relative;flex:1;min-height:0}
#viewport canvas{display:block}
#vig{position:fixed;inset:0;pointer-events:none;z-index:5;
  background:radial-gradient(ellipse at center,transparent 58%,rgba(0,0,0,.34) 100%)}

/* ===== 顶栏（自适应换行） ===== */
#topbar{position:relative;z-index:20;display:flex;align-items:center;flex-wrap:wrap;gap:8px;row-gap:7px;
  padding:8px 12px;background:linear-gradient(180deg,rgba(10,13,18,.92),rgba(10,13,18,.7));
  backdrop-filter:blur(16px) saturate(1.3);border-bottom:1px solid var(--line);user-select:none}
.brand{display:flex;align-items:center;gap:8px;font-weight:650;font-size:13.5px;flex:none}
.brand svg{width:18px;height:18px;color:var(--acc);flex:none}
.chip{font-size:11px;color:var(--sub);border:1px solid var(--line);padding:1px 8px;border-radius:999px;white-space:nowrap}
.sep{width:1px;height:20px;background:var(--line);flex:none}
.spacer{flex:1;min-width:0}

.seg{display:flex;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:9px;padding:2px;flex:none}
.seg button{border:0;background:transparent;color:var(--sub);font-size:12.5px;padding:4px 12px;border-radius:7px;cursor:pointer;transition:.15s;white-space:nowrap}
.seg button:hover{color:var(--txt)}
.seg button.active{background:rgba(79,140,255,.24);color:#dbe7ff}

.btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:9px;
  border:1px solid var(--line);background:rgba(255,255,255,.05);color:var(--txt);
  font-size:12.5px;cursor:pointer;transition:.15s;white-space:nowrap}
.btn:hover{background:rgba(255,255,255,.1)}
.btn.primary{background:linear-gradient(180deg,#5f97ff,#3a78f6);border-color:rgba(255,255,255,.18);color:#fff;font-weight:600}
.btn.primary:hover{filter:brightness(1.08)}
.btn svg{width:15px;height:15px;flex:none}
.iconbtn{width:31px;height:31px;padding:0;justify-content:center}
.tog.active{background:rgba(79,140,255,.22);border-color:rgba(122,168,255,.5);color:#dbe7ff}
button:focus-visible{outline:2px solid var(--acc);outline-offset:2px}

/* 示例下拉框 */
.dropdown{position:relative;flex:none}
.dropdown .menu{position:absolute;top:calc(100% + 6px);left:0;min-width:200px;max-height:42vh;overflow-y:auto;
  background:var(--panel);backdrop-filter:blur(18px) saturate(1.3);border:1px solid var(--line);border-radius:11px;
  padding:5px;z-index:40;box-shadow:0 14px 38px rgba(0,0,0,.45);display:none;scrollbar-width:thin}
.dropdown.open .menu{display:block}
.dropdown .menu button{display:flex;align-items:center;gap:9px;width:100%;text-align:left;border:0;
  background:transparent;color:var(--txt);font-size:12.5px;padding:7px 10px;border-radius:8px;cursor:pointer}
.dropdown .menu button:hover{background:rgba(255,255,255,.08)}
.dropdown .menu .dot{width:6px;height:6px;border-radius:50%;background:var(--sub);flex:none;opacity:.5}
.dropdown .menu button.cur{background:rgba(79,140,255,.16)}
.dropdown .menu button.cur .dot{background:var(--acc);opacity:1}
#btn-sample svg{transition:transform .18s}
.dropdown.open #btn-sample svg{transform:rotate(180deg)}

/* ===== 侧面板 ===== */
#panel{position:fixed;top:calc(var(--tbh) + 10px);right:12px;width:254px;z-index:19;background:var(--panel);
  backdrop-filter:blur(18px) saturate(1.3);border:1px solid var(--line);border-radius:14px;
  box-shadow:0 12px 36px rgba(0,0,0,.42);user-select:none;
  transition:opacity .2s,transform .2s;max-height:calc(100vh - var(--tbh) - 78px);overflow-y:auto;scrollbar-width:thin}
body.panel-off #panel{opacity:0;transform:translateX(16px);pointer-events:none}
.sec{padding:11px 13px}
.sec+.sec{border-top:1px solid var(--line)}
.sec-title{font-size:11px;letter-spacing:.1em;color:var(--sub);margin-bottom:9px;font-weight:600}
.row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:9px 0 3px;color:var(--txt)}
.row b{color:var(--acc);font-weight:600;font-variant-numeric:tabular-nums}
.row input[type=range]{flex:1;max-width:128px;accent-color:var(--acc)}
.hide{display:none!important}

.switch{position:relative;width:34px;height:20px;flex:none}
.switch input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.switch i{position:absolute;inset:0;background:rgba(255,255,255,.14);border-radius:999px;transition:.18s;pointer-events:none}
.switch i::after{content:"";position:absolute;left:3px;top:3px;width:14px;height:14px;border-radius:50%;background:#c8d2e0;transition:.18s}
.switch input:checked+i{background:var(--acc)}
.switch input:checked+i::after{transform:translateX(14px);background:#fff}

.btn-row{display:flex;gap:8px;margin-top:4px}
.btn-row .btn{flex:1;justify-content:center}
.viewgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:10px}
.viewgrid button{padding:6px 0;border:1px solid var(--line);background:rgba(255,255,255,.04);
  color:var(--txt);border-radius:8px;font-size:12.5px;cursor:pointer;transition:.15s}
.viewgrid button:hover{background:rgba(255,255,255,.1);border-color:rgba(122,168,255,.45)}
.viewgrid .span2{grid-column:span 2}
.keys{font-size:12px;color:var(--sub);line-height:2}

/* ===== 状态栏 / 提示 ===== */
#status{position:fixed;left:12px;right:12px;bottom:10px;z-index:18;display:flex;flex-wrap:wrap;
  justify-content:space-between;gap:8px;pointer-events:none;user-select:none}
.sc{display:flex;align-items:center;gap:12px;background:var(--panel);backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:10px;padding:5px 12px;font-size:12px;color:var(--sub);
  pointer-events:auto;white-space:nowrap;overflow:hidden;max-width:100%}
.sc b{color:var(--txt);font-weight:600}
#chip-stats{display:flex;gap:12px}
@media(max-width:960px){#chip-keys{display:none}}

#hint{position:fixed;left:50%;bottom:52px;transform:translateX(-50%);z-index:17;
  background:var(--panel);backdrop-filter:blur(14px);border:1px solid var(--line);border-radius:12px;
  padding:9px 16px;font-size:12.5px;color:var(--sub);transition:opacity .4s;
  max-width:min(640px,92vw);text-align:center;pointer-events:none}
#hint.hide{opacity:0}
#hint b{color:var(--txt);font-weight:600}

/* ===== 方向罗盘 ===== */
#gizmo{position:fixed;right:12px;bottom:50px;width:92px;height:92px;z-index:15;cursor:grab}

/* ===== 拖放 / 加载 / 通知 ===== */
#drop{position:fixed;inset:0;z-index:60;display:none;background:rgba(23,46,102,.28);backdrop-filter:blur(3px)}
#drop.on{display:block}
#drop .box{position:absolute;inset:14px;border:2px dashed rgba(122,168,255,.75);border-radius:16px;
  display:grid;place-items:center;color:#dbe7ff;font-size:15px;letter-spacing:.05em;background:rgba(20,40,90,.15)}

#load{position:fixed;inset:0;z-index:70;display:grid;place-items:center;background:rgba(8,10,14,.5);
  backdrop-filter:blur(2px);opacity:0;visibility:hidden;transition:.2s}
#load.on{opacity:1;visibility:visible}
.load-card{display:flex;flex-direction:column;align-items:center;gap:13px;background:var(--panel);
  border:1px solid var(--line);border-radius:14px;padding:24px 34px}
.spin{width:34px;height:34px;border-radius:50%;
  background:conic-gradient(from 0deg,transparent,var(--acc));
  -webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 4px),#000 calc(100% - 3px));
  mask:radial-gradient(farthest-side,transparent calc(100% - 4px),#000 calc(100% - 3px));
  animation:rot 1s linear infinite}
@keyframes rot{to{transform:rotate(1turn)}}
#load-name{font-size:13px;color:var(--txt);max-width:260px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.bar{width:200px;height:3px;border-radius:99px;background:rgba(255,255,255,.1);overflow:hidden}
.bar i{display:block;height:100%;width:0;background:var(--acc);border-radius:99px;transition:width .15s}
.bar.indet i{width:36%;animation:slide 1.1s ease-in-out infinite alternate}
@keyframes slide{from{transform:translateX(-40%)}to{transform:translateX(260%)}}

#toasts{position:fixed;top:calc(var(--tbh) + 12px);left:50%;transform:translateX(-50%);z-index:80;display:flex;
  flex-direction:column;align-items:center;gap:8px;pointer-events:none;width:max-content;max-width:92vw}
.toast{background:var(--panel);backdrop-filter:blur(14px);border:1px solid var(--line);
  border-left:3px solid var(--acc);border-radius:10px;padding:8px 15px;font-size:12.5px;color:var(--txt);
  box-shadow:0 8px 28px rgba(0,0,0,.35);animation:tin .22s ease;max-width:70vw}
.toast.success{border-left-color:#3ecf8e}
.toast.error{border-left-color:#ff6b6b}
.toast.out{opacity:0;transform:translateY(-6px);transition:.3s}
@keyframes tin{from{opacity:0;transform:translateY(-8px)}}

/* ===== 响应式 ===== */
@media (max-width:1240px){ .brand .chip{display:none} }
@media (max-width:1080px){
  .brand .brand-name{display:none}
  .sep{display:none}
}
@media (max-width:760px){
  #topbar{padding:7px 9px;gap:7px}
  .btn{padding:5px 9px;font-size:12px}
  .seg button{padding:4px 8px;font-size:12px}
  .iconbtn{width:29px;height:29px}
  #panel{right:8px;width:calc(100vw - 16px);max-width:262px}
  #status{left:8px;right:8px}
  .sc{padding:4px 9px;font-size:11.5px;gap:8px}
  #gizmo{width:76px;height:76px;right:8px;bottom:52px}
  #hint{font-size:12px;bottom:58px}
}