:root{
  --bg:#0b1020; --fg:#e9eefb; --muted:#a7b0c3; --card:#121a2b;
  --accent:#6ae6c1; --accent-2:#7aa2ff; --danger:#ff6b6b; --border:#23314f;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  background:radial-gradient(1200px 600px at 10% -10%,#15213f 0%,#0b1020 60%,#070a14 100%);
  color:var(--fg)}
.wrap{max-width:1000px;margin:0 auto;padding:24px}
.muted{color:var(--muted)}
.hero{text-align:center;padding:48px 24px 16px;
  background:radial-gradient(800px 260px at 50% 0%,rgba(122,162,255,.2),transparent 60%),
             linear-gradient(180deg,rgba(13,20,40,.6),transparent);
  border-bottom:1px solid var(--border)}
.hero h1{margin:0;font-size:42px;letter-spacing:.5px;color:#fff;text-shadow:0 6px 30px rgba(106,230,193,.15)}
.bg-gallery{display:grid;grid-template-columns:repeat(2,minmax(220px,1fr));gap:10px;margin-bottom:16px}
.bg-tile{border-radius:12px;min-height:120px;background:#111 no-repeat center/cover;
  background-image:var(--bg);background-image:image-set(var(--bg));
  box-shadow:inset 0 0 0 1px var(--border),0 8px 24px rgba(0,0,0,.25);position:relative}
.bg-tile::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 40%,rgba(0,0,0,.25));border-radius:12px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(260px,1fr));gap:14px;margin-bottom:10px}
.grid label{display:grid;gap:6px;font-weight:600;color:#d9e3ff}
input,select{padding:10px 12px;background:#0e1627;color:#e9eefb;border:1px solid var(--border);border-radius:8px;outline:none}
input::placeholder{color:#7d8bb0}
fieldset.weights{grid-column:1 / -1;display:grid;gap:10px;border:1px solid var(--border);padding:12px;border-radius:10px;background:#0c1323}
fieldset.weights legend{padding:0 8px;color:#cfd9ff}
.weight-row{display:grid;grid-template-columns:1fr 260px;gap:10px;align-items:center}
.btn{display:inline-block;padding:12px 18px;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#07101f;border:0;border-radius:10px;font-weight:700;cursor:pointer;box-shadow:0 8px 24px rgba(122,162,255,.25)}
.btn:disabled{opacity:.6;cursor:not-allowed}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--border)}
.tbl{width:100%;border-collapse:collapse;margin-top:12px}
.tbl th,.tbl td{border:1px solid var(--border);padding:10px;text-align:left;vertical-align:top}
.tbl th{background:#0e182d;color:#cfe2ff}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin:12px 0}
.card{border:1px solid var(--border);border-radius:12px;padding:12px;background:var(--card);box-shadow:0 8px 16px rgba(0,0,0,.25)}
.mono{white-space:pre-wrap;word-break:break-word;background:#0b1326;border:1px solid var(--border);padding:10px;border-radius:8px;color:#d7e6ff}
.flash p{padding:10px;background:#2b0f14;border:1px solid #572131;border-radius:8px;color:#ffd9df}
.actions{grid-column:1 / -1;display:flex;gap:10px}