:root { color-scheme: light dark; --bg:#eef1f5; --card:#fff; --ink:#1b2733; --muted:#6b7a8a;
  --line:#e6eaef; --brand:#1e6fe0; --brand-ink:#fff; --err:#c0392b; --ok:#1e8449; --warn:#e67e22; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui,-apple-system,Segoe UI,Roboto,sans-serif; background:var(--bg); color:var(--ink); }
.hidden { display:none !important; }
.view { min-height:100vh; }
.muted { color:var(--muted); }
.small { font-size:13px; }
.break { word-break:break-all; }
.error { color:var(--err); font-size:14px; }

/* login */
.login-card { max-width:380px; margin:12vh auto; }
h1 { font-size:22px; margin:0 0 4px; }

/* layout */
.card { background:var(--card); border-radius:14px; padding:20px; box-shadow:0 4px 20px rgba(0,0,0,.06);
  margin:16px; }
.topbar { display:flex; align-items:center; justify-content:space-between; padding:14px 20px;
  background:var(--card); box-shadow:0 2px 10px rgba(0,0,0,.05); }
.brand { font-weight:700; }
.brand .dot { color:var(--brand); }
.grid { display:grid; grid-template-columns:1fr; gap:0; }
@media (min-width:860px){ .grid { grid-template-columns:1.2fr .8fr; align-items:start; } }

h2 { font-size:17px; margin:0 0 14px; }

/* forms */
form label { display:block; font-size:13px; font-weight:600; color:var(--muted); margin-bottom:12px; }
form input, form select { display:block; width:100%; margin-top:5px; padding:10px 12px; font-size:15px;
  border:1px solid var(--line); border-radius:9px; background:var(--card); color:var(--ink); }
.row { display:grid; grid-template-columns:1fr 1fr; gap:12px; }
@media (max-width:520px){ .row { grid-template-columns:1fr; } }
button, .btn { display:inline-block; cursor:pointer; border:0; border-radius:9px; padding:11px 16px;
  font-size:15px; font-weight:600; background:var(--brand); color:var(--brand-ink); text-decoration:none; text-align:center; }
button.ghost, .btn.ghost { background:transparent; color:var(--brand); border:1px solid var(--brand); }
button[type=submit] { width:100%; margin-top:4px; }

/* qr */
.codes { display:flex; flex-wrap:wrap; gap:16px; }
.code-block { flex:1; min-width:180px; }
.code-label { font-size:13px; font-weight:700; color:var(--muted); margin-bottom:6px; }
.code-label .tag { font-weight:600; font-size:11px; background:rgba(30,111,224,.14); color:var(--brand);
  padding:1px 7px; border-radius:999px; margin-left:4px; }
.qr-wrap { text-align:center; padding:8px; }
.qr-wrap img { border:1px solid var(--line); border-radius:10px; background:#fff; max-width:100%; height:auto; }
.qr-actions { display:flex; gap:8px; margin:10px 0; }
.qr-actions .btn { flex:1; }

/* table */
.table-scroll { overflow-x:auto; }
table { width:100%; border-collapse:collapse; font-size:14px; }
th, td { text-align:left; padding:9px 10px; border-bottom:1px solid var(--line); white-space:nowrap; }
th { color:var(--muted); font-weight:600; }
.badge { font-size:12px; font-weight:700; padding:2px 8px; border-radius:999px; }
.badge.valid { background:rgba(30,132,73,.14); color:var(--ok); }
.badge.revoked { background:rgba(230,126,34,.16); color:var(--warn); }
.link-btn { background:none; border:0; color:var(--brand); cursor:pointer; font-size:13px; padding:2px 6px; }
.link-btn.danger { color:var(--err); }

@media (prefers-color-scheme: dark){
  :root { --bg:#0f1620; --card:#161f2b; --ink:#e6edf3; --muted:#93a2b2; --line:#243040; }
}