:root {
  --qtr-bg: rgba(13, 2, 24, 0.72);
  --qtr-border: rgba(255,255,255,0.12);
  --qtr-text: #fff;
  --qtr-muted: rgba(255,255,255,0.7);
  --qtr-input: rgba(255,255,255,0.10);
  --qtr-btn-grad: linear-gradient(90deg, #6E00FF 0%, #FF52C2 100%);
  --qtr-radius: 18px;
  --qtr-shadow: 0 10px 30px rgba(0,0,0,0.35);
}
.qtr-wrap { max-width: 1000px; margin: 0 auto; }
.qtr-panel { background: var(--qtr-bg); border: 1px solid var(--qtr-border); border-radius: var(--qtr-radius);
             padding: 18px; color: var(--qtr-text); backdrop-filter: blur(10px); box-shadow: var(--qtr-shadow); }
.qtr-input,.qtr-select,.qtr-textarea { width:100%; background:var(--qtr-input); color:var(--qtr-text);
  border:1px solid var(--qtr-border); border-radius:14px; padding:12px 14px; }
.qtr-btn { display:inline-block; padding:12px 16px; border:0; border-radius:14px; color:#fff;
  background-image:var(--qtr-btn-grad); font-weight:700; cursor:pointer; }