:root {
  --bg: #f6f7f9; --panel: #fff; --border: #e3e6ea; --text: #1a1d21; --muted: #6b7280;
  --primary: #2f6feb; --primary-dark: #1f4fb8; --danger: #d0342c; --success: #15803d; --warn: #b45309;
  --radius: 8px;
}
* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #14161a; color: #d7dade; flex-shrink: 0; padding: 20px 0; }
.sidebar .brand { padding: 0 20px 16px; font-weight: 700; font-size: 16px; color: #fff; border-bottom: 1px solid #262a30; margin-bottom: 12px; }
.sidebar nav a { display: block; padding: 9px 20px; color: #b7bcc4; }
.sidebar nav a:hover, .sidebar nav a.active { background: #1f232a; color: #fff; text-decoration: none; }
.main { flex: 1; padding: 28px 32px; max-width: 1200px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 16px; margin: 24px 0 10px; }
.muted { color: var(--muted); }
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); font-size: 13px; vertical-align: middle; }
th { color: var(--muted); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: .03em; }
tr:last-child td { border-bottom: none; }
.btn { display: inline-block; padding: 7px 14px; border-radius: 6px; border: 1px solid var(--border); background: #fff; color: var(--text); cursor: pointer; font-size: 13px; }
.btn:hover { background: #f2f3f5; text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: #fff; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: #fdeceb; }
.btn-sm { padding: 4px 9px; font-size: 12px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], select, textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; font-family: inherit; background: #fff; color: var(--text);
}
label { display: block; font-weight: 600; margin-bottom: 5px; font-size: 13px; }
.field { margin-bottom: 14px; max-width: 520px; }
.field .hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 11px; font-weight: 600; text-transform: uppercase; }
.badge-active { background: #dcfce7; color: var(--success); }
.badge-inactive, .badge-expired { background: #f3f4f6; color: var(--muted); }
.badge-revoked { background: #fde8e7; color: var(--danger); }
.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 13px; }
.flash-success { background: #dcfce7; color: var(--success); }
.flash-error { background: #fde8e7; color: var(--danger); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .num { font-size: 26px; font-weight: 700; }
.stat .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; align-items: center; flex-wrap: wrap; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }
.pagination { display: flex; gap: 6px; margin-top: 14px; }
.center-card { max-width: 380px; margin: 80px auto; }
.text-right { text-align: right; }