:root{--bg:#0f172a;--card:#1e293b;--muted:#94a3b8;--text:#e2e8f0;--accent:#22c55e;--warn:#f59e0b;--danger:#ef4444;--blue:#3b82f6;--border:#334155}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--blue)}
.wrap{max-width:1100px;margin:0 auto;padding:20px}
.center{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:20px;margin-bottom:16px}
.narrow{width:100%;max-width:420px}
h1{margin:0 0 6px;font-size:1.6rem}
h2{margin:0 0 12px;font-size:1.15rem}
.muted{color:var(--muted);font-size:.9rem}
label{display:block;font-size:.85rem;color:var(--muted);margin:10px 0 4px}
input,select{width:100%;padding:10px 12px;border-radius:8px;border:1px solid var(--border);background:#0b1220;color:var(--text);font-size:1rem}
input[type=checkbox]{width:auto}
button{padding:10px 14px;border-radius:8px;border:0;background:var(--blue);color:#fff;font-size:.95rem;cursor:pointer}
button:disabled{opacity:.5;cursor:default}
button.green{background:var(--accent)}button.red{background:var(--danger)}button.gray{background:#475569}button.sm{padding:5px 9px;font-size:.8rem}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}
.row>*{flex:1;min-width:120px}
.err{color:var(--danger);min-height:1.2em;font-size:.9rem;margin-top:8px}
.ok{color:var(--accent)}
.big-code input{font-size:1.6rem;text-align:center;letter-spacing:.3em}
.timer{font-size:3.4rem;font-weight:700;text-align:center;font-variant-numeric:tabular-nums;margin:10px 0}
.bar{height:10px;background:#0b1220;border-radius:6px;overflow:hidden}
.bar>div{height:100%;background:var(--accent);transition:width 1s linear}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:.75rem;font-weight:600}
.b-new{background:#1d4ed8}.b-active{background:#15803d}.b-expired{background:#7f1d1d}.b-disabled{background:#475569}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:8px 6px;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle}
th{color:var(--muted);font-weight:500}
td.actions{white-space:nowrap}
td.actions button{margin:1px}
.mono{font-family:ui-monospace,Consolas,monospace;letter-spacing:.05em}
.tabs{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap}
.tabs button{background:#334155}.tabs button.on{background:var(--blue)}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-bottom:16px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:14px}
.stat b{display:block;font-size:1.6rem}
.hidden{display:none!important}
.presets button{margin:4px 4px 0 0}
pre{background:#0b1220;padding:10px;border-radius:8px;overflow:auto;font-size:.8rem}
.tablewrap{overflow-x:auto}