:root{
  --bg:#f7f7fb; --card:#ffffff; --text:#1f2937; --muted:#6b7280; --primary:#2563eb;
  --ring:#c7d2fe; --success:#16a34a; --danger:#dc2626; --warning:#d97706;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial}
.container{max-width:1000px;margin:24px auto;padding:0 16px}
.card{background:var(--card);border:1px solid #e5e7eb;border-radius:16px;box-shadow:0 2px 12px rgba(0,0,0,.04);padding:20px}
h1,h2{margin:0 0 10px;color:var(--text)}
h1{font-size:24px} h2{font-size:18px}
a{color:var(--primary);text-decoration:none}
.btn{display:inline-block;padding:10px 14px;border-radius:12px;border:1px solid #d1d5db;background:#fff;color:var(--text);cursor:pointer}
.btn-primary{background:var(--primary);color:#fff;border-color:transparent}
.btn-danger{background:var(--danger);color:#fff;border-color:transparent}
.btn-success{background:var(--success);color:#fff;border-color:transparent}
input,select{width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:12px;outline:none}
input:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--ring)}
.grid{display:grid;gap:12px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.nav{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.kpi{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.kpi .item{padding:16px;border-radius:14px;background:#fff;border:1px solid #eee}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid #eee;padding:10px 8px;text-align:left;font-size:14px}
.badge{padding:4px 10px;border-radius:999px;background:#eef2ff;border:1px solid #e0e7ff;color:#3730a3;font-size:12px}
.footer{margin-top:16px;color:var(--muted);font-size:13px}
.flash{padding:10px 12px;border-radius:10px;margin-bottom:12px}
.flash-ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.flash-err{background:#fef2f2;color:#7f1d1d;border:1px solid #fecaca}
.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.small{font-size:13px;color:var(--muted)}
.code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#f3f4f6;padding:2px 6px;border-radius:6px}

/* Tabs ngang */
.tabs{display:flex;gap:8px;margin-bottom:16px;border-bottom:2px solid #e5e7eb;flex-wrap:wrap}
.tab-link{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border:none;background:none;cursor:pointer;
  font-size:15px;color:var(--muted);border-radius:8px 8px 0 0}
.tab-link.active{background:var(--primary);color:#fff}
.tab-pane{padding-top:4px}

/* Icon size */
.tab-ico{width:18px;height:18px;display:inline-block}