:root{
  --bg: #0f1724;
  --card: #0b1220;
  --text: #e6eef8;
  --accent: #6ee7b7;
  --muted: #94a3b8;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: linear-gradient(180deg,#071226 0%, #071829 60%);
  color:var(--text);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:32px;
}

.container{
  width:100%;
  max-width:760px;
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:12px;
  padding:28px;
  box-shadow:0 8px 30px rgba(2,6,23,0.7);
  border:1px solid rgba(255,255,255,0.03);
}

h1{
  margin:0 0 6px 0;
  font-size:1.5rem;
}
.lead{color:var(--muted); margin:0 0 18px 0}

.panel{
  background:var(--card);
  border-radius:8px;
  padding:14px;
  margin-bottom:12px;
  display:flex;
  gap:12px;
  align-items:center;
  flex-wrap:wrap;
}

input{
  padding:8px 10px;
  border-radius:6px;
  border:1px solid rgba(255,255,255,0.06);
  background:transparent;
  color:var(--text);
  min-width:180px;
}

button{
  background:linear-gradient(180deg, #10b981, #059669);
  border:0;
  padding:9px 12px;
  color:white;
  border-radius:8px;
  cursor:pointer;
  font-weight:600;
  box-shadow:0 6px 16px rgba(6,95,70,0.18);
}

button:active{transform:translateY(1px)}

.swatch{
  min-width:120px;
  height:40px;
  border-radius:8px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:600;
  color:#042017;
  background:var(--accent);
}

footer{margin-top:8px; text-align:right; color:var(--muted)}