:root{
  --bg:#071025;
  --card:#071428;
  --panel:#071a2a;
  --accent:#07b7d1;
  --primary:#06b6d4;
  --muted:#9fb0c6;
  --text:#e6eef7;
  --danger:#ff6b6b;
}
*{box-sizing:border-box}
html,body{
  height:100%;
  margin:0;
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial;
  background:linear-gradient(180deg,#061025 0%, #061328 100%);
  color:var(--text);
}
main{
  min-height:100vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:flex-start;
  padding:18px;
  gap:12px;
}
header{width:100%; max-width:1200px}
h1{margin:0; font-size:20px}
.subtitle{margin:6px 0 0 0; color:var(--muted); font-size:13px}

.panel{
  width:100%;
  max-width:1200px;
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:10px;
  padding:14px;
  display:flex;
  gap:12px;
  box-shadow: 0 8px 30px rgba(2,6,23,0.6);
}
.panel.left{flex-direction:column; flex:1}
.panel.right{flex-direction:column; flex:1}

@media (min-width:960px){
  .panel{flex-direction:row}
  .panel.left{flex:1 1 50%}
  .panel.right{flex:1 1 50%}
}

label{font-size:13px;color:var(--muted); margin-bottom:6px}
textarea{
  width:100%;
  min-height:220px;
  resize:vertical;
  background:transparent;
  border:1px solid rgba(255,255,255,0.04);
  color:var(--text);
  padding:12px;
  border-radius:8px;
  font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Courier New", monospace;
  font-size:13px;
}

.row.controls{display:flex; gap:8px; margin-top:8px; flex-wrap:wrap}
button{
  border:0;
  background:var(--primary);
  color:#02282b;
  padding:9px 12px;
  border-radius:8px;
  cursor:pointer;
  font-weight:700;
  font-size:13px;
}
button.secondary{background:transparent; color:var(--primary); border:1px solid rgba(6,182,212,0.12)}
button.muted{background:transparent; color:var(--muted); border:1px solid rgba(255,255,255,0.03)}
button.small{padding:6px 8px; font-size:12px}
button.small.muted{background:transparent; color:var(--muted); border:1px solid rgba(255,255,255,0.03)}

.options{margin-top:12px; display:flex; flex-direction:column; gap:8px}
.option-row{display:flex; gap:8px; align-items:center}
.option-row input[type="text"]{flex:1; padding:8px; border-radius:6px; border:1px solid rgba(255,255,255,0.03); background:rgba(255,255,255,0.01); color:var(--text)}

.domain-section{margin-top:12px}
.domain-header{display:flex; justify-content:space-between; align-items:center}
.domain-list{margin-top:8px; display:flex; flex-direction:column; gap:8px}
.domain-row{display:flex; gap:8px; align-items:center}
.domain-row input[type="text"]{flex:1; padding:8px; border-radius:6px; border:1px solid rgba(255,255,255,0.03); background:rgba(255,255,255,0.01); color:var(--text)}
.domain-row button{padding:6px 8px}

.domain-hint{margin-top:6px; font-size:12px; color:var(--muted)}

.messages{min-height:44px; margin-top:10px; color:var(--muted); font-size:13px}

/* footer */
footer{width:100%; max-width:1200px; color:var(--muted); font-size:13px; margin-top:6px}

/* mobile tweaks */
@media (max-width:600px){
  textarea{min-height:160px}
  .panel{padding:12px}
  h1{font-size:18px}
}