:root{
  --bg:#0b1020;
  --card:#111a33;
  --text:#e8eeff;
  --muted:#a9b4da;
  --border:#26325f;
  --btn:#1d2a57;
  --btn2:#24346d;
  --good:#7ee787;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% 10%, #1a2a6a33, transparent),
              radial-gradient(1000px 500px at 80% 40%, #7c3aed22, transparent),
              var(--bg);
  color:var(--text);
  display:grid;
  place-items:center;
  padding:24px;
}

.card{
  width:min(760px, 100%);
  background: linear-gradient(180deg, #121c3b, var(--card));
  border:1px solid var(--border);
  border-radius:20px;
  padding:22px;
  box-shadow: 0 15px 45px #00000066;
}

.header h1{margin:0 0 6px; font-size:1.6rem}
.sub{margin:0 0 14px; color:var(--muted)}

.label{display:block; margin-bottom:8px; color:var(--muted); font-weight:600}
.output{padding:14px; border:1px solid var(--border); border-radius:16px; background:#0e1630}

.outputRow{display:flex; gap:10px; align-items:center}
.password{
  flex:1;
  width:100%;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:#0a1126;
  color:var(--text);
  font-size:1.05rem;
}

.btn{
  padding:11px 14px;
  border-radius:12px;
  border:1px solid var(--border);
  background:linear-gradient(180deg, var(--btn2), var(--btn));
  color:var(--text);
  cursor:pointer;
  font-weight:700;
}
.btn:hover{filter:brightness(1.08)}
.btn:active{transform:translateY(1px)}
.primary{border-color:#3b82f6aa}

.meterRow{display:flex; align-items:center; gap:12px; margin-top:12px}
.meter{
  height:10px; flex:1;
  background:#0a1126;
  border:1px solid var(--border);
  border-radius:999px;
  overflow:hidden;
}
.meterFill{
  height:100%;
  width:0%;
  background:linear-gradient(90deg, #ef4444, #f59e0b, #22c55e);
  transition:width .2s ease;
}
.meterText{color:var(--muted); font-weight:700; font-size:.95rem}

.controls{margin-top:16px}
.row{display:flex; flex-direction:column; gap:10px; padding:14px}
#length{width:100%}

.fieldset{
  border:1px solid var(--border);
  border-radius:16px;
  padding:14px;
  margin:12px 0;
  background:#0e1630;
}
legend{color:var(--muted); font-weight:800}
.check{
  display:flex; align-items:center; gap:10px;
  padding:8px 6px;
  color:var(--text);
}
.check input{transform:scale(1.15)}
.actions{display:flex; gap:10px; margin-top:12px}
.hint{margin:12px 4px 0; color:var(--muted); min-height:1.2em}
.footer{margin-top:16px; color:var(--muted)}