:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --border: #e3e6ed;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warn: #f59e0b;
  --danger: #dc2626;
  --off: #9ca3af;
  --radius: 8px;
  --shadow: 0 1px 2px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.55;
}

/* Nav */
.navbar {
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: #fff;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.nav-inner {
  display: flex;
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  gap: 24px;
  height: 56px;
}
.brand {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  letter-spacing: 0.3px;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
  flex: 1;
}
.nav-links a {
  display: block;
  padding: 8px 12px;
  color: #cbd5e1;
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav-links a.active { color: #fff; background: rgba(255,255,255,0.12); }

.nav-user {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}
.nav-user a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 4px;
}
.nav-user a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.user-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.08);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 500;
}

.container {
  max-width: 1280px;
  margin: 24px auto;
  padding: 0 24px;
}

h1 { font-size: 22px; margin: 0 0 20px; font-weight: 600; }
h2 { font-size: 16px; margin: 24px 0 12px; font-weight: 600; }
h1 + section, h2 + section, section + section { margin-top: 16px; }

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.page-header h1 { margin: 0; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
}
.btn:hover { background: #f9fafb; border-color: #d1d5db; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-warning { background: var(--warn); color: #fff; border-color: var(--warn); }
.btn-warning:hover { background: #d97706; border-color: #d97706; }

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font-size: inherit;
  padding: 0;
}
.link-btn:hover { text-decoration: underline; }
.link-btn.link-danger { color: var(--danger); }

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.table th, .table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.table thead th {
  background: #f8fafc;
  font-weight: 600;
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: #f9fafb; }
.table code {
  font-size: 12px;
  background: #f1f5f9;
  padding: 1px 6px;
  border-radius: 3px;
}

.token-cell {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", monospace;
  font-size: 11px !important;
  word-break: break-all;
  display: inline-block;
  max-width: 240px;
}

.actions { white-space: nowrap; }
.actions form, .actions a { margin-right: 8px; }

/* Cards & stats */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--primary);
}
.stat-label { color: var(--muted); font-size: 12px; }
.stat-value { font-size: 20px; font-weight: 600; margin-top: 4px; }

.actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

/* Form */
.form-card {
  background: var(--card);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 720px;
}
.form-card label {
  display: block;
  margin-bottom: 12px;
  font-weight: 500;
  color: #374151;
}
.form-card input[type=text],
.form-card input[type=password],
.form-card input[type=number],
.form-card input:not([type]),
.form-card select,
.form-card textarea {
  display: block;
  width: 100%;
  padding: 7px 10px;
  margin-top: 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
.form-card input:focus, .form-card select:focus, .form-card textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
}
.form-card input[disabled] { background: #f3f4f6; color: var(--muted); }
.form-card label.checkbox {
  font-weight: normal;
  display: flex;
  align-items: center;
  gap: 6px;
}
.form-card label.checkbox input { width: auto; margin: 0; }
.form-card fieldset {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 16px;
  margin: 16px 0;
}
.form-card fieldset legend {
  padding: 0 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}
.form-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

/* Badges & tags */
.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}
.badge-ok { background: #dcfce7; color: #166534; }
.badge-off { background: #f3f4f6; color: var(--off); }

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}
.tag-tcp { background: #dbeafe; color: #1e40af; }
.tag-udp { background: #fef3c7; color: #92400e; }
.tag-http { background: #dcfce7; color: #166534; }
.tag-https { background: #f3e8ff; color: #6b21a8; }
.tag-tcpmux { background: #fee2e2; color: #991b1b; }

.role-tag {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 10px;
  background: rgba(255,255,255,0.15);
  color: #e2e8f0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.role-admin { background: #fee2e2; color: #991b1b; }
.role-tenant_admin { background: #fef3c7; color: #92400e; }
.role-user { background: #dbeafe; color: #1e40af; }

.action-tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 11px;
  background: #f3f4f6;
  color: #374151;
  font-family: ui-monospace, monospace;
}

/* Flash messages */
.flash-area { margin-bottom: 16px; }
.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 8px;
  border-left: 3px solid var(--primary);
  background: #eff6ff;
  color: #1e40af;
}
.flash-success { border-color: var(--success); background: #f0fdf4; color: #166534; }
.flash-error { border-color: var(--danger); background: #fef2f2; color: #991b1b; }

.alert {
  padding: 12px 16px;
  border-radius: 6px;
  margin: 12px 0;
}
.alert-error { background: #fef2f2; color: #991b1b; border-left: 3px solid var(--danger); }

/* Login */
.login-card {
  max-width: 360px;
  margin: 80px auto;
  background: var(--card);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}
.login-card h1 { margin: 0 0 4px; }
.login-card form { text-align: left; margin-top: 20px; }
.login-card form label { display: block; margin-bottom: 12px; }
.login-card form input {
  display: block;
  width: 100%;
  padding: 8px 10px;
  margin-top: 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}
.login-card button { width: 100%; margin-top: 8px; }

/* Misc */
.muted { color: var(--muted); }
.muted.small { font-size: 12px; }
.offline { color: var(--danger); font-weight: 600; }

.filter-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  align-items: center;
}
.filter-bar label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}
.filter-bar select {
  padding: 5px 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 16px;
  align-items: center;
  font-size: 13px;
}
.pagination a {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--primary);
  text-decoration: none;
  background: #fff;
}

.error-card {
  text-align: center;
  padding: 60px 0;
}
.error-card h1 { font-size: 60px; color: var(--muted); margin: 0; }

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 24px 0;
}