:root{--bg:#0f141b;--panel:#161c24;--text:#e6edf3;--muted:#98a2b3;--primary:#7c9cff;--accent:#22c55e;--ghost:#2a303b;--border:#222b36;--shadow:0 8px 30px rgba(0,0,0,.25)}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,PingFang SC,Helvetica,Arial,"Noto Sans",sans-serif;background:linear-gradient(180deg,#0e131a,#0b0f15);color:var(--text);-webkit-font-smoothing:antialiased}

.app-header{padding:16px 20px 8px;text-align:center}
.app-header h1{margin:0;font-size:22px;font-weight:700}
.subtitle{margin:6px 0 0;color:var(--muted);font-size:13px}

.app-main{max-width:1000px;margin:0 auto;padding:12px}
.controls{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:12px;box-shadow:var(--shadow)}
.control-row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.toggle{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:13px}

.btn{appearance:none;border:1px solid var(--border);background:var(--ghost);color:var(--text);padding:10px 12px;border-radius:10px;cursor:pointer;font-weight:600}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btn-primary{background:var(--primary);border-color:transparent;color:#fff}
.btn-accent{background:var(--accent);border-color:transparent;color:#03120a}
.btn-ghost{background:transparent}

input[type=file]{display:none}

.grid{display:grid;gap:10px;margin-top:10px}
.two-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
@media (min-width:900px){.two-cols{grid-template-columns:repeat(4,minmax(0,1fr))}}

.slider{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center;background:#0f1520;border:1px solid var(--border);padding:10px;border-radius:10px}
.slider span{grid-column:1/3;color:var(--muted);font-size:12px}
.slider input{width:100%}
.slider output{min-width:40px;text-align:right;color:#cbd5e1}
.slider select{width:100%;padding:8px 10px;border-radius:8px;background:#0c1118;border:1px solid var(--border);color:var(--text)}

.stage-wrapper{margin:0 0 14px}
.mascot-area{display:flex;justify-content:center;align-items:flex-end;height:90px;margin:12px 0 0}
.mascot-area img{display:block;max-height:100%;object-fit:contain;filter:drop-shadow(0 2px 6px rgba(0,0,0,.35))}
.stage{position:relative;width:100%;background:#0b1118;border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}
#canvas{width:100%;height:100%;display:block}

.tips{color:var(--muted);font-size:13px}
.tips summary{cursor:pointer}

.app-footer{padding:14px 0;text-align:center;color:var(--muted);font-size:12px}