:root {
  --bg: #0b0f17;
  --bg-elev: #131a25;
  --bg-elev-2: #1a2333;
  --border: #233044;
  --text: #e7edf5;
  --muted: #8a97ad;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --danger: #ef4444;
  --success: #22c55e;
  --warn: #f59e0b;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(0,0,0,0.35);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

.muted { color: var(--muted); }
.error { color: var(--danger); margin: 12px 0; }
.success { color: var(--success); margin: 12px 0; }

.centered {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 460px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.card h1 {
  font-size: 22px;
  margin: 0 0 6px 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card .subtitle {
  color: var(--muted);
  margin: 0 0 24px 0;
  font-size: 14px;
}

label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

input[type="text"], input[type="password"], select {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 16px;
  font-family: inherit;
  margin-bottom: 16px;
  transition: border-color 0.15s ease;
}

input[type="text"]:focus, input[type="password"]:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

input.code-input {
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: 0.15em;
  text-align: center;
  text-transform: uppercase;
}

button, .btn {
  display: inline-block;
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.15s ease;
}

button:hover, .btn:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
  background: var(--bg-elev-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--border); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--border);
  width: auto;
  padding: 6px 10px;
  font-size: 13px;
}
.btn-danger:hover { background: rgba(239,68,68,0.1); }

.btn-link {
  display: inline-block;
  padding: 8px 12px;
  color: var(--accent);
  width: auto;
}

.helper {
  font-size: 13px;
  color: var(--muted);
  margin-top: 14px;
  text-align: center;
}

.code-display {
  font-family: var(--mono);
  font-size: 42px;
  letter-spacing: 0.12em;
  text-align: center;
  padding: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 14px 0;
  user-select: all;
  font-weight: 600;
}

.code-meta {
  text-align: center;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}

/* Admin dashboard */
.shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
}

.topbar h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 600;
}

.topbar .user {
  color: var(--muted);
  font-size: 14px;
}

.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.panel h2 {
  font-size: 15px;
  margin: 0 0 14px 0;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.latest-code-card {
  background: linear-gradient(135deg, rgba(59,130,246,0.08), rgba(59,130,246,0.02));
  border-color: rgba(59,130,246,0.4);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td.code { font-family: var(--mono); font-size: 15px; letter-spacing: 0.06em; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.badge.active { background: rgba(34,197,94,0.15); color: var(--success); }
.badge.used { background: rgba(138,151,173,0.15); color: var(--muted); }
.badge.expired { background: rgba(245,158,11,0.15); color: var(--warn); }
.badge.revoked { background: rgba(239,68,68,0.15); color: var(--danger); }

select.ttl {
  width: auto;
  padding: 10px 12px;
  margin-bottom: 0;
}

button.inline {
  width: auto;
  padding: 10px 16px;
}

.topbar form { margin: 0; }
.row label { margin: 0; }
td.right { text-align: right; }

@media (max-width: 600px) {
  .card { padding: 24px 20px; }
  .code-display { font-size: 32px; }
  .topbar { flex-direction: column; align-items: flex-start; gap: 10px; }
  th, td { padding: 8px 6px; font-size: 13px; }
  .hide-mobile { display: none; }
}