:root{
  --bg:#0f1117;--card:#1a1d27;--border:#2a2d3a;--accent:#4f8ef7;
  --accent2:#34d399;--danger:#f87171;--warn:#fbbf24;--text:#e2e8f0;
  --muted:#64748b;--radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{background:var(--bg);color:var(--text);font-family:'Segoe UI',system-ui,sans-serif;min-height:100vh;}
.screen{display:none;min-height:100vh;padding:20px 16px;}
.screen.active{display:block;}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;max-width:460px;margin:0 auto;}
.logo{text-align:center;margin-bottom:28px;}
.logo h1{font-size:1.5rem;font-weight:700;letter-spacing:2px;}
.logo p{color:var(--muted);font-size:0.8rem;margin-top:4px;}
label{display:block;font-size:0.82rem;color:var(--muted);margin-bottom:5px;}
input,select{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);
            padding:11px 14px;font-size:0.95rem;outline:none;transition:border .2s;}
input:focus,select:focus{border-color:var(--accent);}
.field{margin-bottom:16px;}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:12px;
      border:none;border-radius:8px;font-size:0.95rem;font-weight:600;cursor:pointer;
      transition:opacity .2s,transform .1s;letter-spacing:.5px;}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--accent);color:#fff;}
.btn-success{background:var(--accent2);color:#0f1117;}
.btn-danger{background:var(--danger);color:#fff;}
.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--text);}
.btn-sm{width:auto;padding:7px 14px;font-size:.82rem;}
.btn+.btn{margin-top:10px;}
.alert{padding:10px 14px;border-radius:8px;font-size:.85rem;margin-bottom:14px;display:none;}
.alert.show{display:block;}
.alert-err{background:rgba(248,113,113,.12);border:1px solid var(--danger);color:var(--danger);}
.alert-ok{background:rgba(52,211,153,.12);border:1px solid var(--accent2);color:var(--accent2);}
nav{background:var(--card);border-bottom:1px solid var(--border);padding:14px 16px;
    display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;}
.nav-title{font-weight:700;font-size:1.05rem;letter-spacing:1px;}
.nav-right{display:flex;gap:8px;align-items:center;}
.avatar{width:34px;height:34px;background:var(--accent);border-radius:50%;
        display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;cursor:pointer;}
.tab-bar{display:flex;background:var(--card);border-bottom:1px solid var(--border);overflow-x:auto;}
.tab-btn{flex:1;min-width:80px;padding:14px 8px;background:none;border:none;
         border-bottom:3px solid transparent;color:var(--muted);font-size:.8rem;font-weight:600;
         cursor:pointer;transition:all .2s;white-space:nowrap;}
.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent);}
.tab-panel{display:none;padding:16px;max-width:700px;margin:0 auto;}
.tab-panel.active{display:block;}
.client-item{background:var(--card);border:1px solid var(--border);border-radius:10px;
            padding:14px 16px;margin-bottom:10px;display:flex;align-items:center;
            justify-content:space-between;cursor:pointer;transition:border-color .2s;}
.client-item:hover{border-color:var(--accent);}
.client-name{font-weight:600;}
.client-meta{font-size:.78rem;color:var(--muted);margin-top:2px;}
.badge{background:var(--accent);color:#fff;border-radius:20px;padding:2px 10px;font-size:.75rem;font-weight:700;}
.table-wrap{overflow-x:auto;border-radius:10px;border:1px solid var(--border);margin-top:14px;}
table{width:100%;border-collapse:collapse;font-size:.85rem;}
th{background:var(--bg);padding:10px 12px;text-align:left;color:var(--muted);
   font-weight:600;white-space:nowrap;}
td{padding:10px 12px;border-top:1px solid var(--border);vertical-align:middle;}
tr:hover td{background:rgba(255,255,255,.02);}
.chart-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
            padding:16px;margin-top:16px;}
.chart-card h3{font-size:0.9rem;color:var(--muted);margin-bottom:12px;}
.prog-wrap{background:var(--bg);border-radius:99px;height:8px;overflow:hidden;}
.prog-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--accent),var(--accent2));
           transition:width .4s;}
.section-title{font-size:.75rem;text-transform:uppercase;letter-spacing:2px;
               color:var(--muted);margin:20px 0 10px;}
#qrContainer{display:flex;justify-content:center;margin:16px 0;}
#qrContainer canvas{border-radius:8px;}
.divider{border:none;border-top:1px solid var(--border);margin:20px 0;}
.del-btn{background:none;border:none;color:var(--danger);cursor:pointer;
        font-size:.9rem;padding:4px 6px;border-radius:6px;transition:background .2s;}
.del-btn:hover{background:rgba(248,113,113,.1);}
.modal-bg{display:none;position:fixed;inset:0;background:rgba(0,0,0,.7);
          z-index:200;align-items:center;justify-content:center;padding:16px;}
.modal-bg.open{display:flex;}
.modal-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
           padding:24px;width:100%;max-width:420px;max-height:90vh;overflow-y:auto;}
.modal-title{font-size:1.1rem;font-weight:700;margin-bottom:16px;}
@media(max-width:480px){
  .card{padding:20px 16px;}
  td,th{padding:8px 8px;}
}