*{box-sizing:border-box}html,body{height:100%}
:root{
  --bg:#0f0f13;
  --card:#17171d;
  --text:#e6e6ea;
  --muted:#a0a0ac;
  --accent:#7aa2ff;
  --accent-2:#67e8f9;
  --border:#242430;
}
:root.light{
  --bg:#f6f7fb;
  --card:#ffffff;
  --text:#17181c;
  --muted:#636e7b;
  --accent:#2b6cff;
  --accent-2:#22c1d6;
  --border:#e5e7ef;
}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, sans-serif;
  color:var(--text);
  background: radial-gradient(1200px 600px at 80% -10%, rgba(122,162,255,.18), transparent) ,var(--bg);
}
.container{max-width:880px;margin:0 auto;padding:24px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px}
h1{font-size:clamp(1.6rem,3vw,2.2rem);margin:12px 0 6px}
.sub{color:var(--muted);margin:0 0 18px}
.actions{display:flex;gap:10px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 18px 8px;box-shadow:0 10px 30px rgba(0,0,0,.15)}
.output-row{display:flex;gap:10px;align-items:center;margin-bottom:12px}
.output{flex:1;background:transparent;border:1px solid var(--border);color:var(--text);padding:12px 14px;border-radius:10px;font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;font-size:16px}
.output-label{display:block;margin-bottom:6px;color:var(--muted)}
.controls .row{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:10px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:8px;border:1px dashed var(--border);padding:10px;border-radius:10px}
label{user-select:none}
.btn{border:1px solid var(--border);background:transparent;color:var(--text);padding:10px 14px;border-radius:10px;cursor:pointer}
.btn:hover{border-color:#2c2c3a}
.btn.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#0a0a0e;border:none}
.meter{flex:1;height:10px;background:transparent;border-radius:20px;border:1px solid var(--border);overflow:hidden;min-width:180px}
.meter>div{height:100%;width:0%;background:linear-gradient(90deg,#ff6b6b,#fcbf49,#22c55e)}
.strength-row{gap:12px}
.entropy{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.muted{color:var(--muted)}
details.tips{margin-top:6px}
footer{margin-top:16px;color:var(--muted)}
input[type=range]{width:260px}