:root,
[data-theme="dark"] {
  --bg-page: #0b0f19;
  --bg-surface: #111827;
  --bg-elevated: #1f2937;
  --bg-input: #0f172a;
  --border-color: #263248;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-primary: #3b82f6;
  --accent-hover: #2563eb;
  --accent-cyan: #06b6d4;
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.14);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.14);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg-page: #f1f5f9;
  --bg-surface: #ffffff;
  --bg-elevated: #f8fafc;
  --bg-input: #ffffff;
  --border-color: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent-primary: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-cyan: #0891b2;
  --success: #15803d;
  --success-bg: #dcfce7;
  --warning: #b45309;
  --warning-bg: #fef3c7;
  --danger: #dc2626;
  --danger-bg: #fce8e6;
  --shadow-card: 0 8px 24px -8px rgba(15, 23, 42, 0.08);
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

code,
pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ==========================================================================
   Sign-In View & Form Validation (validate-input-after-interaction)
   ========================================================================== */

.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.brand-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-header h1 {
  font-size: 1.25rem;
  margin: 0.25rem 0;
}

.subtitle {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.field {
  margin-bottom: 1.15rem;
}

.field label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.2rem;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Format hints placed ABOVE inputs per validate-input-after-interaction */
.hint {
  display: block;
  color: var(--text-secondary);
  font-size: 0.78rem;
  margin-bottom: 0.35rem;
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="search"],
select {
  width: 100%;
  padding: 0.65rem 0.8rem;
  font-size: 0.92rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-primary);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

input:focus,
select:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 1px;
}

.error-msg {
  display: none;
  color: var(--danger);
  font-size: 0.82rem;
  margin-top: 0.35rem;
  font-weight: 500;
}

/* Defer validation error styling until after user interaction (:user-invalid) */
input:user-invalid,
input.user-invalid-fallback {
  border-color: var(--danger);
  background-color: var(--danger-bg);
}

input:user-invalid + .error-msg,
input.user-invalid-fallback + .error-msg {
  display: block;
}

input:user-valid,
input.user-valid-fallback {
  border-color: var(--success);
}

.form-alert {
  padding: 0.75rem;
  border-radius: 8px;
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: var(--danger);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.auth-footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.endpoint-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.pill {
  font-size: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, monospace;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-accent {
  background-color: var(--accent-cyan);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.35);
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent-primary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
}

.badge-accent {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-primary);
}

.badge-online {
  background: var(--success-bg);
  color: var(--success);
}

.badge-offline {
  background: var(--danger-bg);
  color: var(--danger);
}

.badge-claiming {
  background: var(--warning-bg);
  color: var(--warning);
}

/* ==========================================================================
   Topbar & Dashboard Layout
   ========================================================================== */

.topbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1.5rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.brand-logo-sm {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.topbar-title-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.domain-chip {
  font-size: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, monospace;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
}

.topbar-subtitle {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warning);
}

.dot.online {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}

.dot.standby {
  background: var(--warning);
}

.dashboard-content {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.5rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.15rem 1.25rem;
}

.metric-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

.metric-value {
  font-size: 1.45rem;
  font-weight: 700;
}

.metric-value small {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.metric-sub {
  margin-top: 0.35rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  padding: 0.5rem 0.95rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
}

.tab-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
}

.panel-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.panel-grid.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.card-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

.card-desc {
  margin: 0.2rem 0 0;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.input-sm {
  width: 220px !important;
  padding: 0.4rem 0.65rem !important;
  font-size: 0.82rem !important;
}

/* ==========================================================================
   Responsive Tables (Following responsive-table guide:
   container-type: inline-size, sticky thead & tbody th, @container stacked)
   ========================================================================== */

.table-wrapper {
  overflow: auto;
  max-inline-size: 100%;
  max-block-size: min(520px, 75vh);
  container-type: inline-size;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.86rem;
}

thead {
  position: sticky;
  inset-block-start: 0;
  z-index: 2;
  background: var(--bg-elevated);
}

thead th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

tbody th,
tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

/* Sticky row headers (desktop) */
tbody th {
  position: sticky;
  inset-inline-start: 0;
  z-index: 1;
  background: var(--bg-surface);
  text-align: left;
  font-weight: 600;
}

.empty-cell {
  text-align: center !important;
  color: var(--text-secondary);
  padding: 2rem !important;
}

.kv-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.kv-chip {
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.76rem;
  padding: 0.12rem 0.45rem;
  border-radius: 5px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
}

.kv-chip strong {
  color: var(--accent-cyan);
}

/* Table column variable definitions for mobile stacked container query */
.table-sessions {
  --label-2: "Owner";
  --label-3: "Type / FW";
  --label-4: "State";
  --label-5: "Sub-Topic";
  --label-6: "CSV-KV";
  --label-7: "Messages";
  --label-8: "Last Seen";
}

.table-messages {
  --label-2: "Channel";
  --label-3: "Raw CSV-KV";
  --label-4: "Parsed KV";
  --label-5: "Flags";
  --label-6: "Timestamp";
}

.table-acls {
  --label-2: "Permission";
  --label-3: "Topic Pattern";
  --label-4: "Description";
  --label-5: "Created";
  --label-6: "Action";
}

.table-keys {
  --label-2: "Key Preview";
  --label-3: "Role";
  --label-4: "Created";
  --label-5: "Last Used";
  --label-6: "Action";
}

@container (width < 600px) {
  table,
  thead,
  tbody,
  tr,
  th,
  td {
    display: block;
  }

  thead {
    display: none;
  }

  tr {
    margin: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
  }

  tbody th {
    position: sticky;
    inset-block-start: 0;
    z-index: 2;
    background: var(--bg-elevated);
  }

  td:nth-child(2)::before {
    content: var(--label-2) ": ";
    font-weight: 600;
    color: var(--text-secondary);
  }
  td:nth-child(3)::before {
    content: var(--label-3) ": ";
    font-weight: 600;
    color: var(--text-secondary);
  }
  td:nth-child(4)::before {
    content: var(--label-4) ": ";
    font-weight: 600;
    color: var(--text-secondary);
  }
  td:nth-child(5)::before {
    content: var(--label-5) ": ";
    font-weight: 600;
    color: var(--text-secondary);
  }
  td:nth-child(6)::before {
    content: var(--label-6) ": ";
    font-weight: 600;
    color: var(--text-secondary);
  }
  td:nth-child(7)::before {
    content: var(--label-7) ": ";
    font-weight: 600;
    color: var(--text-secondary);
  }
  td:nth-child(8)::before {
    content: var(--label-8) ": ";
    font-weight: 600;
    color: var(--text-secondary);
  }
}

/* ==========================================================================
   Modal Dialogs (light-dismiss-a-dialog)
   ========================================================================== */

dialog {
  width: min(500px, 92vw);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: var(--bg-surface);
  color: var(--text-primary);
  padding: 0;
  box-shadow: var(--shadow-card);
}

dialog::backdrop {
  background-color: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(3px);
}

.dialog-body {
  padding: 1.5rem;
}

.dialog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.dialog-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.dialog-desc {
  margin: 0 0 1.1rem;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.btn-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
}

.dialog-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.65rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.checkbox-field label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  cursor: pointer;
}

.key-reveal-banner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--success-bg);
  border-bottom: 1px solid var(--success);
}

.prose-box {
  padding: 1.25rem;
  font-size: 0.9rem;
}

.prose-box pre {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.85rem;
  overflow-x: auto;
}

.toast-container {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--accent-primary);
  color: var(--text-primary);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  box-shadow: var(--shadow-card);
}