:root{--bg:#070b14;--panel:rgba(255,255,255,.045);--line:rgba(255,255,255,.09);--gold:#d6b36a;--txt:#e8ecf4;--muted:#8b93a7;--accent:#7aa2ff}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--txt);background:radial-gradient(1200px 800px at 50% -10%,#141c33 0%,#070b14 55%),#070b14;overflow-x:hidden}
.masthead{padding:20px 26px 6px}
.brand{display:flex;align-items:center;gap:14px}
.logo{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#e7c985,#b98a3f);color:#1a1205;font-weight:800;display:grid;place-items:center;font-size:19px;box-shadow:0 6px 20px rgba(214,179,106,.25)}
.brand h1{font-size:19px;letter-spacing:.5px;font-weight:700}
.sub{color:var(--muted);font-size:12px;letter-spacing:.6px;margin-top:2px}
main{max-width:1100px;margin:0 auto;padding:12px 18px 40px}
.select-bar{display:flex;align-items:center;gap:14px;margin:12px 0 20px}
#model{flex:1;appearance:none;-webkit-appearance:none;background:var(--panel);border:1px solid var(--line);color:var(--txt);font-size:15px;padding:13px 42px 13px 16px;border-radius:12px;cursor:pointer;outline:none;backdrop-filter:blur(8px);background-image:linear-gradient(45deg,transparent 50%,var(--gold) 50%),linear-gradient(135deg,var(--gold) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%;background-size:6px 6px;background-repeat:no-repeat}
#model:focus{border-color:var(--gold);box-shadow:0 0 0 1px var(--gold)}
#model option{background:#0d1424;color:var(--txt)}
.meta-line{color:var(--muted);font-size:12px;white-space:nowrap}
.stage{background:var(--panel);border:1px solid var(--line);border-radius:20px;overflow:hidden;padding:14px}
.stage-title{font-size:16px;font-weight:650;padding:0 4px 12px}
#viewer{position:relative;height:min(66vh,580px);border-radius:14px;overflow:hidden;background:radial-gradient(ellipse at 50% 40%,#131b30 0%,#05070c 100%)}
#canvas{width:100%;height:100%;display:block}
.hud{position:absolute;top:12px;left:16px;color:var(--muted);font-size:12px;pointer-events:none;letter-spacing:.3px}
.toolbar{display:flex;gap:10px;margin-top:14px}
.toolbar button{flex:1;padding:11px;border-radius:12px;border:1px solid var(--line);background:var(--panel);color:var(--txt);font-size:13px;cursor:pointer;transition:.18s;backdrop-filter:blur(6px)}
.toolbar button:hover{border-color:var(--accent);color:#cfe0ff}
@media(max-width:720px){
  #viewer{height:56vh}
  .select-bar{flex-direction:column;align-items:stretch;gap:8px}
  .meta-line{white-space:normal}
  .masthead{padding:16px 16px 4px}
  main{padding:12px 14px 30px}
  .toolbar button{padding:12px}
}