*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#0d9488;--primary-light:#5eead4;--accent:#14b8a6;
  --bg:#0C0F12;--bg-card:rgba(18,22,28,.85);
  --bg-input:rgba(12,15,18,.8);--text:#E8F0ED;--text-dim:#8BA8A0;
  --text-muted:#5A7A72;--border:rgba(13,148,136,.15);
  --success:#00B894;--danger:#FF6B6B;
  --radius:12px;--radius-sm:8px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,system-ui,sans-serif;
  --mono:'JetBrains Mono','SFMono-Regular','Consolas',monospace;
  --transition:250ms ease;--glass-bg:rgba(18,22,28,.6);--glass-border:rgba(255,255,255,.06)
}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}
body::before{content:'';position:fixed;inset:0;background:radial-gradient(ellipse at 30% 20%,rgba(13,148,136,.08) 0%,transparent 50%),radial-gradient(ellipse at 70% 80%,rgba(94,234,212,.04) 0%,transparent 50%);pointer-events:none}
.app{position:relative;z-index:1;max-width:640px;margin:0 auto}
.header{padding:1rem 1.5rem;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:.75rem}
.header-brand{display:flex;align-items:center;gap:.75rem}
.lock-icon{font-size:1.5rem}
.header-brand h1{font-size:1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--primary-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{font-size:.72rem;color:var(--text-dim)}
.main{padding:1.5rem}
.glass-card{background:var(--glass-bg);backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:var(--radius);padding:1.25rem;margin-bottom:1rem}
.section-title{font-size:.82rem;font-weight:700;color:var(--primary-light);margin-bottom:.75rem}
.output-card{position:relative;display:flex;align-items:center;gap:.5rem}
.passphrase-display{flex:1;font-family:var(--mono);font-size:1.05rem;font-weight:600;color:var(--text);word-break:break-all;line-height:1.6;min-height:2rem}
.passphrase-display .word{display:inline-block;animation:wordSlide 300ms ease both}
@keyframes wordSlide{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.btn-copy{background:none;border:none;font-size:1.1rem;cursor:pointer;padding:.25rem;transition:transform 150ms}
.btn-copy:hover{transform:scale(1.15)}
.ctrl-grid{display:grid;grid-template-columns:1fr 1fr;gap:.5rem}
.ctrl-item{display:flex;flex-direction:column;gap:.2rem}
.ctrl-label{font-size:.72rem;font-weight:600;color:var(--text-muted);display:flex;align-items:center;gap:.3rem}
.ctrl-label input[type="checkbox"]{accent-color:var(--primary)}
.range-wrap{display:flex;align-items:center;gap:.35rem}
.range{flex:1;accent-color:var(--primary);height:4px}
.range-val{font-family:var(--mono);font-size:.78rem;font-weight:600;color:var(--primary-light);min-width:20px;text-align:center}
.select{padding:.3rem .45rem;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.78rem;font-family:var(--font)}
.btn-row{display:flex;gap:.35rem}
.btn{display:inline-flex;align-items:center;gap:.25rem;padding:.4rem .75rem;border:none;border-radius:var(--radius-sm);font-size:.78rem;font-weight:600;font-family:var(--font);cursor:pointer;transition:all var(--transition)}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#0C0F12}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(13,148,136,.3)}
.btn-accent{background:rgba(20,184,166,.15);color:var(--accent);border:1px solid rgba(20,184,166,.2)}
.btn-accent:hover{background:rgba(20,184,166,.25)}
.entropy-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:.35rem}
.entropy-card{padding:.5rem;background:rgba(255,255,255,.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm);text-align:center}
.entropy-value{font-size:1.1rem;font-weight:800;color:var(--primary-light)}
.entropy-label{font-size:.65rem;color:var(--text-muted);margin-top:.1rem}
.batch-list{display:flex;flex-direction:column;gap:.2rem}
.batch-row{display:flex;align-items:center;gap:.35rem;padding:.35rem .5rem;background:rgba(255,255,255,.02);border:1px solid var(--glass-border);border-radius:var(--radius-sm);font-family:var(--mono);font-size:.75rem;color:var(--text-dim);cursor:pointer;transition:background 150ms}
.batch-row:hover{background:rgba(13,148,136,.08)}
.footer{padding:1rem 1.5rem;text-align:center;font-size:.72rem;color:var(--text-muted);border-top:1px solid var(--border)}
.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:200;display:flex;flex-direction:column;gap:.5rem}
.toast{background:var(--bg-card);border:1px solid var(--border);border-left:3px solid var(--accent);backdrop-filter:blur(20px);border-radius:var(--radius-sm);padding:.6rem .85rem;font-size:.78rem;color:var(--text);box-shadow:0 8px 40px rgba(0,0,0,.4);animation:slideIn 300ms ease;max-width:320px}
@keyframes slideIn{from{opacity:0;transform:translateX(20px)}to{opacity:1;transform:translateX(0)}}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:rgba(13,148,136,.25);border-radius:3px}
@media(max-width:480px){.ctrl-grid{grid-template-columns:1fr}}