:root{
  --orange:#E8621A; --orange-d:#d2540f; --orange-l:#FDF0E9;
  --green:#1F7A1F; --red:#c0392b; --ink:#222; --mut:#888; --line:#ececec; --bg:#fafafa;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--orange);text-decoration:none}
a:hover{text-decoration:underline}
.topbar{position:sticky;top:0;z-index:30;background:#fff;border-bottom:2px solid var(--orange);
  display:flex;align-items:center;gap:14px;padding:10px 18px;flex-wrap:wrap}
.brand{font-weight:800;color:var(--orange);font-size:18px;display:flex;align-items:center;gap:9px}
a.brand{text-decoration:none}
a.brand:hover{text-decoration:none;opacity:.88}
.brand .logo{width:32px;height:32px;border-radius:9px;background:var(--orange);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800}
.brand small{font-weight:500;color:var(--mut);font-size:12px;margin-left:2px}
.spacer{flex:1}
.pill{font-size:12px;padding:4px 11px;border-radius:20px;font-weight:700}
.pill.free{background:#eef;color:#4453c4}
.pill.pro{background:#e6f4e6;color:var(--green)}
.pill.pending{background:#fff4e0;color:#b8791a}
.pill.expired{background:#fdeeee;color:var(--red)}
.container{max-width:960px;margin:0 auto;padding:22px 18px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 4px 20px rgba(0,0,0,.04);margin-bottom:18px}
.card h2{margin:0 0 14px;font-size:19px;color:var(--ink)}
.btn{display:inline-block;padding:11px 18px;font-size:15px;font-weight:600;border-radius:11px;border:1.5px solid var(--orange);
  background:var(--orange);color:#fff;cursor:pointer;transition:.15s;text-align:center}
.btn:hover{background:var(--orange-d);text-decoration:none}
.btn.ghost{background:#fff;color:var(--orange)}
.btn.ghost:hover{background:var(--orange-l)}
.btn.gray{border-color:var(--line);background:#fff;color:#555}
.btn.danger{border-color:var(--red);background:#fff;color:var(--red)}
.btn.danger:hover{background:#fdeeee}
.btn.block{display:block;width:100%}
.btn.sm{padding:6px 12px;font-size:13px;border-radius:9px}
input,select,textarea{width:100%;padding:11px 13px;font-size:15px;border:1.5px solid #e3d5cc;border-radius:11px;outline:none;transition:.15s;font-family:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--orange);box-shadow:0 0 0 3px rgba(232,98,26,.12)}
label{display:block;font-size:13px;color:#555;margin:12px 0 5px;font-weight:600}
.flash{padding:12px 15px;border-radius:11px;margin-bottom:16px;font-weight:600}
.flash.ok{background:#e6f4e6;color:var(--green)}
.flash.err{background:#fdeeee;color:var(--red)}
.flash.info{background:var(--orange-l);color:var(--orange-d)}
.center-wrap{min-height:calc(100vh - 60px);display:flex;align-items:center;justify-content:center;padding:24px}
.auth-card{width:100%;max-width:400px}
.muted{color:var(--mut);font-size:14px}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row>*{flex:1;min-width:160px}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--orange-l);color:var(--orange-d);font-weight:700;font-size:13px}
tr:hover td{background:#fafafa}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.stat-box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px}
.stat-box .n{font-size:26px;font-weight:800;color:var(--orange)}
.stat-box .l{font-size:13px;color:var(--mut);margin-top:2px}
.qr-img{max-width:240px;border:1px solid var(--line);border-radius:12px;padding:8px;background:#fff}

/* ---------- Responsive (điện thoại) ---------- */
@media (max-width:640px){
  .container{padding:16px 12px}
  .topbar{padding:9px 12px;gap:8px}
  .brand{font-size:16px}
  .brand small{display:none}
  .card{padding:18px 16px;border-radius:14px}
  .card h2{font-size:17px}
  .btn{padding:10px 14px;font-size:14px}
  .btn.sm{padding:6px 10px}
  .stat-box .n{font-size:22px}
  .topbar .muted{display:none}            /* ẩn tên dài cho gọn trên mobile */
  .topbar .muted.keep{display:inline}
  th,td{padding:8px 9px;font-size:13px}
}
@media (max-width:420px){
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .pill{font-size:11px;padding:3px 8px}
}