/* MayaBay-like palette */
:root{
  --bg:#fff7f3;
  --ink:#1f2723;
  --muted:#66736c;
  --green:#2e3e32;       /* deep forest */
  --pink:#e9c9c9;        /* soft sakura */
  --gold:#bfa262;
  --accent:#c04a36;      /* warm accent */
  --card:#ffffff;
  --border:#e7e1dc;
  --shadow:0 10px 30px rgba(0,0,0,.06);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;
  color:var(--ink);
  background:linear-gradient(180deg,var(--bg),#fff);
}

.topbar{
  position:sticky; top:0; z-index:10;
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 22px;
  background:var(--green);
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:.3px}
.logo{width:28px;height:28px;filter:drop-shadow(0 2px 2px rgba(0,0,0,.2))}
.topnav a{color:#f4f4f4;text-decoration:none;margin-left:16px;opacity:.85}
.topnav a.active{border-bottom:2px solid var(--pink);padding-bottom:2px;opacity:1}

.layout{display:grid;grid-template-columns:320px 1fr;min-height:calc(100vh - 64px)}
.sidebar{
  background:#fbf8f6;
  border-right:1px solid var(--border);
  padding:18px;
  overflow:auto;
}
.sidebar-head{display:flex;justify-content:space-between;align-items:center}
.sidebar h2{margin:0 0 10px 0;font-size:18px}
.model-list{list-style:none;margin:10px 0 16px 0;padding:0;display:flex;flex-direction:column;gap:8px}
.model-list li{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:var(--shadow);
  padding:10px 12px;
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  cursor:pointer;
}
.model-list li .name{font-weight:600}
.model-list li .sub{font-size:12px;color:var(--muted)}
.model-list li.active{outline:2px solid var(--gold)}

.upload{margin-top:16px;display:grid;gap:8px}
.upload input[type="text"], .upload input[type="file"]{
  background:#fff;border:1px solid var(--border);border-radius:10px;padding:10px
}
.hint{color:var(--muted);font-size:12px;margin:4px 0 0}

.viewer{display:grid;grid-template-rows:1fr auto;min-height:0}
.viewer-wrap{
  height:calc(100vh - 160px);
  background:#f3f4f3;
  border-left:1px solid var(--border);
  display:flex;align-items:center;justify-content:center
}
model-viewer{width:100%;height:100%}
.viewer-meta{
  display:flex;gap:16px;align-items:center;
  padding:10px 16px;border-top:1px solid var(--border);background:#fff
}
.muted{color:var(--muted)}
.footer{padding:16px;text-align:center;color:var(--muted);border-top:1px solid var(--border);background:#fff}

.btn{border:1px solid var(--border);background:#fff;border-radius:999px;padding:8px 14px;cursor:pointer}
.btn.small{padding:4px 10px;font-size:13px}
.btn.primary{background:var(--pink);border-color:var(--pink)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.danger{background:#f4d0cd;border-color:#f4d0cd;color:#7a1d12}

.divider{height:1px;background:var(--border);margin:12px 0}
@media (max-width: 960px){
  .layout{grid-template-columns:1fr}
  .sidebar{order:2}
}