:root {
  --bg: #0f1419;
  --panel: #1a222c;
  --panel-2: #243040;
  --text: #e8eef4;
  --muted: #8b9aab;
  --accent: #3d9cf0;
  --accent-2: #2a7fc9;
  --ok: #3dbf8c;
  --err: #e85d5d;
  --warn: #e0a84a;
  --border: #2e3a48;
  --radius: 8px;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% -10%, #1a2a3d, transparent),
              radial-gradient(900px 500px at 100% 0%, #1a2830, transparent),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
  background: linear-gradient(180deg, #15202b, #101820);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.brand { font-weight: 700; font-size: 0.95rem; letter-spacing: 0.02em; line-height: 1.3; }
.sidebar nav { display: flex; flex-direction: column; gap: 0.25rem; flex: 1; }
.sidebar nav a {
  color: var(--muted);
  padding: 0.55rem 0.75rem;
  border-radius: 6px;
  text-decoration: none;
}
.sidebar nav a:hover, .sidebar nav a.active {
  background: var(--panel-2);
  color: var(--text);
  text-decoration: none;
}
.logout-form button {
  width: 100%;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 0.5rem;
  border-radius: 6px;
  cursor: pointer;
}
.main { display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.75rem 0.75rem;
  border-bottom: 1px solid var(--border);
}
.topbar h1 { margin: 0; font-size: 1.35rem; font-weight: 600; }
.user-meta { color: var(--muted); font-size: 0.9rem; }
.content { padding: 1.25rem 1.75rem 2rem; }
.flash {
  margin: 0.75rem 1.75rem 0;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.flash-success { background: rgba(61,191,140,0.12); border-color: rgba(61,191,140,0.35); }
.flash-error { background: rgba(232,93,93,0.12); border-color: rgba(232,93,93,0.35); }
.flash-standalone { margin: 1rem auto; max-width: 420px; }
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.stat .label { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.stat .value { font-size: 1.75rem; font-weight: 700; margin-top: 0.25rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.panel h2 { margin: 0 0 0.75rem; font-size: 1rem; }
.table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.table th, .table td { text-align: left; padding: 0.55rem 0.4rem; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 500; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }
.badge {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  border: 1px solid var(--border);
}
.badge-Active { background: rgba(61,191,140,0.15); color: var(--ok); }
.badge-Expired { background: rgba(224,168,74,0.15); color: var(--warn); }
.badge-Revoked { background: rgba(232,93,93,0.15); color: var(--err); }
.badge-Renewed { background: rgba(61,156,240,0.15); color: var(--accent); }
.toolbar { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.btn {
  display: inline-block;
  background: var(--accent);
  color: #041018;
  border: none;
  padding: 0.5rem 0.9rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  font-size: 0.9rem;
}
.btn:hover { background: var(--accent-2); text-decoration: none; color: #041018; }
.btn-secondary { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: #a33b3b; color: #fff; }
.btn-sm { padding: 0.3rem 0.55rem; font-size: 0.8rem; }
.form { max-width: 640px; display: grid; gap: 0.85rem; }
.form label { display: grid; gap: 0.3rem; font-size: 0.88rem; color: var(--muted); }
.form input, .form select, .form textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.55rem 0.65rem;
  font: inherit;
}
.form textarea { min-height: 90px; }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  box-shadow: 0 20px 50px rgba(0,0,0,0.35);
}
.login-card h1 { margin: 0 0 0.35rem; font-size: 1.4rem; }
.login-card p { margin: 0 0 1.25rem; color: var(--muted); font-size: 0.9rem; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 0.85rem; }
.actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }
.quick-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.dl { display: grid; grid-template-columns: 160px 1fr; gap: 0.4rem 1rem; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; }
.checkboxes { display: grid; gap: 0.35rem; }
@media (max-width: 960px) {
  .shell { grid-template-columns: 1fr; }
  .stats, .grid-2 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .stats, .grid-2 { grid-template-columns: 1fr; }
}