:root {
  --sidebar: #0b1220;
  --sidebar-hover: #151f33;
  --sidebar-active: #1a2744;
  --accent: #3b82f6;
  --accent-2: #60a5fa;
  --bg: #f1f5f9;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --ok: #10b981;
  --warn: #f59e0b;
  --err: #ef4444;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, -apple-system, "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

.admin-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  flex-shrink: 0;
  background: linear-gradient(180deg, #0b1220 0%, #0f172a 100%);
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  border-right: 1px solid rgba(255,255,255,0.04);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 8px 20px rgba(59,130,246,0.35);
}

.sidebar-brand strong {
  display: block;
  color: #f8fafc;
  font-size: 15px;
  letter-spacing: 0.04em;
}

.sidebar-brand span {
  font-size: 11px;
  color: #94a3b8;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: #94a3b8;
  transition: all 0.15s;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: #e2e8f0;
}

.nav-item.active {
  background: var(--sidebar-active);
  color: #fff;
  box-shadow: inset 3px 0 0 var(--accent);
}

.nav-icon {
  width: 18px;
  height: 18px;
  opacity: 0.9;
}

.sidebar-foot {
  padding: 16px 20px 24px;
}

.badge-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #86efac;
}

.badge-live::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
}

.main-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  height: 72px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.page-title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-desc {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 6px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
}

.user-chip strong {
  display: block;
  font-size: 13px;
}

.user-chip span {
  font-size: 11px;
  color: var(--muted);
}

.content {
  flex: 1;
  padding: 24px 28px 32px;
}

.footer {
  padding: 14px 28px;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--card);
}

/* Cards & stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.stat-card .label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.stat-card .value {
  margin-top: 8px;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.stat-card.accent .value { color: var(--accent); }
.stat-card.ok .value { color: var(--ok); }
.stat-card.warn .value { color: var(--warn); }
.stat-card.err .value { color: var(--err); }

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-head {
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.panel-head h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.panel-body {
  padding: 0;
}

/* Table */
.table-wrap { overflow-x: auto; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  text-align: left;
  padding: 12px 18px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: #f8fafc;
  border-bottom: 1px solid var(--line);
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

.data-table tr:hover td {
  background: #fafbfc;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0.03em;
}

/* Tags */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.tag-unused { background: #eff6ff; color: #2563eb; }
.tag-active { background: #ecfdf5; color: #059669; }
.tag-revoked { background: #fef2f2; color: #dc2626; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 16px;
  border-radius: 10px;
  border: none;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-primary {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #fff;
  box-shadow: 0 4px 14px rgba(59,130,246,0.3);
}

.btn-primary:hover { filter: brightness(1.05); }

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  background: var(--bg);
  color: var(--ink);
}

.btn-danger {
  background: #fef2f2;
  color: var(--err);
  border: 1px solid #fecaca;
}

.btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 12px;
}

.btn-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* Forms */
.form-grid {
  display: grid;
  gap: 18px;
  max-width: 520px;
}

.form-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 500;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  height: 42px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-field textarea {
  height: auto;
  min-height: 88px;
  padding: 12px 14px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
}

.toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.search-input {
  width: 260px;
  height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 13px;
}

.filter-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg);
  padding: 4px;
  border-radius: 10px;
}

.filter-tabs a {
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
}

.filter-tabs a.active {
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}

.pagination .pages {
  display: flex;
  gap: 6px;
}

.pagination a, .pagination span {
  min-width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-size: 13px;
}

.pagination a:hover { background: var(--bg); }
.pagination .current {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.alert {
  padding: 12px 16px;
  border-radius: 10px;
  margin-bottom: 18px;
  font-size: 13px;
  font-weight: 500;
}

.alert-success { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

/* Login */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0b1220 0%, #1e293b 50%, #0f172a 100%);
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border-radius: 18px;
  padding: 36px 32px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.35);
}

.login-brand {
  text-align: center;
  margin-bottom: 28px;
}

.login-brand .mark {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #6366f1);
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-brand h1 {
  margin: 0;
  font-size: 22px;
}

.login-brand p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.code-block {
  background: #0f172a;
  color: #e2e8f0;
  padding: 14px 16px;
  border-radius: 10px;
  font-family: ui-monospace, monospace;
  font-size: 12px;
  line-height: 1.6;
  overflow-x: auto;
}

.key-result {
  margin-top: 20px;
  padding: 16px;
  background: #f8fafc;
  border: 1px dashed var(--line);
  border-radius: 12px;
  max-height: 280px;
  overflow-y: auto;
}

.key-result .mono {
  display: block;
  padding: 6px 0;
}

@media (max-width: 1200px) {
  .stats-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .admin-shell { flex-direction: column; }
  .sidebar { width: 100%; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}