/* ============================================================
   Nexus Dashboard — Design System
   ============================================================ */

/* --- CSS Custom Properties: Light Theme (default) --- */
:root {
  --bg: #F4F6FA;
  --surface: #FFFFFF;
  --border: #E2E6ED;
  --text: #0A1128;
  --text-muted: #8D99AE;
  --accent: #FF6B35;
  --accent-hover: #E85D2A;
  --accent-light: #FFF3ED;
  --success: #0FA958;
  --success-light: #EDFBF3;
  --danger: #E63946;
  --danger-light: #FFF0F1;
  --warning: #D97706;
  --warning-light: #FFFBF0;
  --nav-bg: #0A1128;
  --nav-text: #E8ECF1;
  --nav-text-muted: #6B7A99;
  --shadow-sm: 0 1px 2px rgba(10,17,40,0.06);
  --shadow-md: 0 4px 12px rgba(10,17,40,0.08);

  /* Bootstrap variable overrides */
  --bs-body-bg: var(--bg);
  --bs-body-color: var(--text);
  --bs-primary: var(--accent);
  --bs-primary-rgb: 255, 107, 53;
  --bs-success: var(--success);
  --bs-success-rgb: 15, 169, 88;
  --bs-danger: var(--danger);
  --bs-danger-rgb: 230, 57, 70;
  --bs-warning: var(--warning);
  --bs-warning-rgb: 217, 119, 6;
  --bs-secondary: var(--text-muted);
  --bs-secondary-rgb: 141, 153, 174;
  --bs-border-color: var(--border);
  --bs-link-color: var(--accent);
  --bs-link-hover-color: var(--accent-hover);
  --bs-heading-color: var(--text);
  --bs-card-bg: var(--surface);
  --bs-card-border-color: var(--border);
  --bs-table-hover-bg: rgba(10,17,40,0.03);
  --bs-input-bg: var(--surface);
  --bs-input-border-color: var(--border);
  --bs-input-focus-border-color: var(--accent);
  --bs-input-focus-box-shadow: 0 0 0 0.2rem rgba(255,107,53,0.15);

  --bs-emphasis-color: var(--text);
  --bs-emphasis-color-rgb: 10, 17, 40;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  --bg: #060918;
  --surface: #0F1324;
  --border: #1A2040;
  --text: #E8ECF1;
  --text-muted: #6B7A99;
  --accent: #FF8C5A;
  --accent-hover: #FFA87D;
  --accent-light: rgba(255,140,90,0.1);
  --success: #26D07C;
  --success-light: rgba(38,208,124,0.1);
  --danger: #FF5A65;
  --danger-light: rgba(255,90,101,0.1);
  --warning: #FBBF24;
  --warning-light: rgba(251,191,36,0.1);
  --nav-bg: #0A1128;
  --nav-text: #E8ECF1;
  --nav-text-muted: #6B7A99;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);

  --bs-body-bg: var(--bg);
  --bs-body-color: var(--text);
  --bs-primary: var(--accent);
  --bs-primary-rgb: 255, 140, 90;
  --bs-success: var(--success);
  --bs-success-rgb: 38, 208, 124;
  --bs-danger: var(--danger);
  --bs-danger-rgb: 255, 90, 101;
  --bs-warning: var(--warning);
  --bs-warning-rgb: 251, 191, 36;
  --bs-secondary: var(--text-muted);
  --bs-secondary-rgb: 107, 122, 153;
  --bs-border-color: var(--border);
  --bs-link-color: var(--accent);
  --bs-link-hover-color: var(--accent-hover);
  --bs-heading-color: var(--text);
  --bs-card-bg: var(--surface);
  --bs-card-border-color: var(--border);
  --bs-table-hover-bg: rgba(255,255,255,0.03);
  --bs-input-bg: var(--surface);
  --bs-input-border-color: var(--border);
  --bs-input-focus-border-color: var(--accent);
  --bs-input-focus-box-shadow: 0 0 0 0.2rem rgba(255,140,90,0.15);

  --bs-emphasis-color: var(--text);
  --bs-emphasis-color-rgb: 232, 236, 241;
  --bs-secondary-color: rgba(232, 236, 241, 0.75);
  --bs-secondary-color-rgb: 107, 122, 153;
  --bs-tertiary-color: rgba(232, 236, 241, 0.5);
  --bs-tertiary-color-rgb: 107, 122, 153;
  --bs-secondary-bg: #1A2040;
  --bs-secondary-bg-rgb: 26, 32, 64;
  --bs-tertiary-bg: #111636;
  --bs-tertiary-bg-rgb: 17, 22, 54;
  --bs-body-color-rgb: 232, 236, 241;
  --bs-body-bg-rgb: 6, 9, 24;

  --bs-btn-close-color: var(--text);
  --bs-btn-close-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23E8ECF1'%3e%3cpath d='M.293.293a1 1 0 0 1 1.414 0L8 6.586 14.293.293a1 1 0 1 1 1.414 1.414L9.414 8l6.293 6.293a1 1 0 0 1-1.414 1.414L8 9.414l-6.293 6.293a1 1 0 0 1-1.414-1.414L6.586 8 .293 1.707a1 1 0 0 1 0-1.414z'/%3e%3c/svg%3e");

  --bs-modal-color: var(--text);
  --bs-modal-bg: var(--surface);
  --bs-modal-border-color: var(--border);
  --bs-modal-header-border-color: var(--border);
  --bs-modal-footer-border-color: var(--border);

  --bs-list-group-color: var(--text);
  --bs-list-group-bg: var(--surface);
  --bs-list-group-border-color: var(--border);

  --bs-accordion-color: var(--text);
  --bs-accordion-bg: var(--surface);
  --bs-accordion-border-color: var(--border);
  --bs-accordion-btn-color: var(--text);
  --bs-accordion-btn-bg: var(--surface);
  --bs-accordion-active-color: var(--accent);
  --bs-accordion-active-bg: var(--surface);
  --bs-accordion-btn-focus-box-shadow: 0 0 0 0.2rem rgba(255,140,90,0.15);

  --bs-pagination-color: var(--text);
  --bs-pagination-bg: var(--surface);
  --bs-pagination-border-color: var(--border);
  --bs-pagination-hover-color: var(--accent);
  --bs-pagination-hover-bg: var(--surface);
  --bs-pagination-hover-border-color: var(--accent);

  --bs-dropdown-color: var(--text);
  --bs-dropdown-bg: var(--surface);
  --bs-dropdown-border-color: var(--border);
  --bs-dropdown-link-color: var(--text);
  --bs-dropdown-link-hover-color: var(--text);
  --bs-dropdown-link-hover-bg: rgba(255,255,255,0.04);

  --bs-popover-bg: var(--surface);
  --bs-popover-border-color: var(--border);
  --bs-popover-header-bg: var(--surface);

  --bs-tooltip-color: var(--text);
  --bs-tooltip-bg: var(--surface);

  --bs-form-valid-color: var(--success);
  --bs-form-valid-border-color: var(--success);
  --bs-form-invalid-color: var(--danger);
  --bs-form-invalid-border-color: var(--danger);
}

/* --- Base --- */
[data-theme="light"], :root {
  color-scheme: light;
}

[data-theme="dark"] {
  color-scheme: dark;
}

body {
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  transition: background-color 0.2s ease, color 0.2s ease;
  letter-spacing: -0.01em;
}

@media (prefers-reduced-motion: reduce) {
  body { transition: none; }
}

h1, h2, h3, h4, h5, h6,
.page-title, .navbar-brand, .stat-value {
  font-family: 'Space Grotesk', 'IBM Plex Sans', sans-serif;
  letter-spacing: -0.02em;
}

code, pre, .mono, .guid-text {
  font-family: 'JetBrains Mono', 'Cascadia Code', 'Consolas', monospace;
  font-size: 0.8125rem;
}

/* --- Focus ring --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* --- Typography --- */
.page-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.25rem;
}

/* --- Navbar --- */
.navbar {
  background-color: var(--nav-bg) !important;
  padding-top: 0.625rem;
  padding-bottom: 0.625rem;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1030;
  --bs-navbar-color: var(--nav-text-muted);
  --bs-navbar-hover-color: var(--nav-text);
  --bs-navbar-active-color: var(--nav-text);
  --bs-navbar-toggler-icon-bg: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28232, 236, 241, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  --bs-navbar-toggler-border-color: rgba(255,255,255,0.15);
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nav-text) !important;
  letter-spacing: -0.01em;
  margin-right: 2rem;
}

.navbar .nav-link {
  color: var(--nav-text-muted) !important;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.375rem 0.875rem;
  border-radius: 6px;
  transition: color 0.15s, background-color 0.15s;
}

.navbar .nav-link:hover {
  color: var(--nav-text) !important;
  background-color: rgba(255,255,255,0.06);
}

.navbar .nav-link.active {
  color: var(--nav-text) !important;
  background-color: rgba(255,255,255,0.1);
}

.navbar .btn-outline-light {
  --bs-btn-color: var(--nav-text-muted);
  --bs-btn-border-color: rgba(255,255,255,0.15);
  --bs-btn-hover-bg: rgba(255,255,255,0.08);
  --bs-btn-hover-border-color: rgba(255,255,255,0.2);
  --bs-btn-hover-color: var(--nav-text);
  font-size: 0.8125rem;
}

#themeToggle {
  background: none;
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--nav-text-muted);
  border-radius: 6px;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  transition: color 0.15s, background-color 0.15s, border-color 0.15s;
  font-size: 0.875rem;
  line-height: 1;
}

#themeToggle:hover {
  color: var(--nav-text);
  border-color: rgba(255,255,255,0.3);
  background-color: rgba(255,255,255,0.08);
}

#themeToggle i {
  font-size: 0.9375rem;
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.stat-cell {
  background: var(--surface);
  padding: 1rem 1.25rem;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.stat-cell.online .stat-value { color: var(--success); }
.stat-cell.offline .stat-value { color: var(--text-muted); }
.stat-cell.revoked .stat-value { color: var(--danger); }

/* Stats bar: heartbeat pulse */
.stats-pulse {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-left: auto;
  padding: 0 1rem;
}

.pulse-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border);
  transition: background-color 0.3s, box-shadow 0.3s;
}

.pulse-dot.active {
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

[data-theme="light"] .pulse-dot.active {
  box-shadow: none;
  background: var(--success);
}

/* --- Cards --- */
.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.25rem;
}

.card-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.75rem 1.25rem;
}

.card-header:first-child {
  border-radius: 10px 10px 0 0;
}

.card-body {
  padding: 1.25rem;
}

/* --- Tables --- */
.table {
  font-size: 0.875rem;
  margin-bottom: 0;
}

.table > thead {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.table > thead th {
  border-bottom-width: 1px;
  padding: 0.625rem 1rem;
  font-weight: 600;
}

.table > tbody td {
  padding: 0.625rem 1rem;
  vertical-align: middle;
}

.table > tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background-color 0.12s;
}

.table > tbody tr:last-child {
  border-bottom: none;
}

.table > tbody tr:hover {
  background-color: var(--bs-table-hover-bg);
}

/* --- Badges --- */
.badge {
  font-weight: 600;
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.3em 0.65em;
  border-radius: 5px;
}

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

.badge-status-offline {
  background: var(--accent-light);
  color: var(--text-muted);
}

.badge-status-checkin-error {
  background: var(--warning-light);
  color: var(--warning);
}

.badge-status-revoked {
  background: var(--danger-light);
  color: var(--danger);
}

.badge-status-archived {
  background: var(--accent-light);
  color: var(--text-muted);
}

/* --- Buttons --- */
.btn {
  font-weight: 600;
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
  border-radius: 7px;
  padding: 0.5rem 1rem;
  transition: all 0.15s ease;
}

.btn-sm {
  font-size: 0.75rem;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
}

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

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

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

.btn-outline-primary:hover,
.btn-outline-primary.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-outline-secondary {
  color: var(--text-muted);
  border-color: var(--border);
}

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

.btn-outline-danger {
  color: var(--danger);
  border-color: var(--danger);
}

.btn-outline-danger:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

/* --- Forms --- */
.form-control,
.form-select {
  font-size: 0.875rem;
  border-radius: 7px;
  padding: 0.5rem 0.75rem;
  border-color: var(--border);
  background-color: var(--surface);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(255,107,53,0.12);
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.375rem;
}

/* --- Filter segments --- */
.filter-segments {
  display: inline-flex;
  background: var(--border);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
}

.filter-segments .filter-btn {
  padding: 0.3rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.filter-segments .filter-btn:hover {
  color: var(--text);
}

.filter-segments .filter-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

/* --- Agent detail: back link --- */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 0.75rem;
  transition: color 0.15s;
}

.back-link:hover {
  color: var(--accent);
}

/* --- Agent detail: info grid --- */
.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.625rem 1.5rem;
  font-size: 0.875rem;
}

.info-grid .info-label {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.info-grid .info-value {
  color: var(--text);
}

/* --- Agent detail: agent title bar --- */
.agent-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.agent-title-bar .agent-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.agent-title-bar .agent-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8125rem;
}

.agent-title-bar .agent-guid {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--accent-light);
  padding: 0.2rem 0.5rem;
  border-radius: 5px;
}

/* --- Console modal --- */
.console-modal .modal-content {
  background: #0A1128;
  border: 1px solid #1A2040;
  color: #E8ECF1;
}

.console-modal .modal-header {
  border-bottom-color: #1A2040;
}

.console-modal .modal-footer {
  border-top-color: #1A2040;
}

.console-modal .console-output {
  font-family: 'JetBrains Mono', 'Consolas', monospace;
  font-size: 0.8125rem;
  min-height: 300px;
  max-height: 50vh;
  overflow-y: auto;
  white-space: pre-wrap;
  background: #060918;
  border-radius: 6px;
  padding: 1rem;
}

.console-modal .console-input {
  background: #0F1324;
  border-color: #1A2040;
  color: #E8ECF1;
  font-family: 'JetBrains Mono', 'Consolas', monospace;
  font-size: 0.8125rem;
}

.console-modal .console-prompt {
  background: #1A2040;
  border-color: #1A2040;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', 'Consolas', monospace;
  font-size: 0.8125rem;
}

/* --- Danger zone --- */
.danger-zone {
  border-top: 1px solid var(--border);
  margin-top: 1rem;
  padding-top: 1rem;
}

.danger-zone-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--danger);
  margin-bottom: 0.75rem;
}

/* --- Alert --- */
.alert {
  border-radius: 8px;
  font-size: 0.875rem;
  border: none;
}

.alert-danger {
  background: var(--danger-light);
  color: var(--danger);
}

.alert-warning {
  background: var(--warning-light);
  color: var(--warning);
}

/* --- Polling Pulse Animation --- */
@keyframes pulse-breathe {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.pulse-dot.animate {
  animation: pulse-breathe 2s ease-in-out infinite;
}

.pulse-dot.animate:nth-child(2) { animation-delay: 0.15s; }
.pulse-dot.animate:nth-child(3) { animation-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  .pulse-dot.animate { animation: none; opacity: 0.3; }
}

/* --- Login Page --- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg);
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  padding: 2.25rem;
  width: 100%;
  max-width: 380px;
}

.login-card .login-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}

.login-card .login-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

/* --- Text muted override --- */
.text-muted {
  color: var(--text-muted) !important;
}

/* --- Modal --- */
.modal-content {
  background-color: var(--surface);
  border-color: var(--border);
}

.modal-header {
  border-bottom-color: var(--border);
}

.modal-footer {
  border-top-color: var(--border);
}

/* --- Accordion --- */
.accordion-item {
  background-color: var(--surface);
  border-color: var(--border);
}

.accordion-button {
  background-color: var(--surface);
  color: var(--text);
  font-size: 0.8125rem;
  font-weight: 500;
}

.accordion-button:not(.collapsed) {
  background-color: var(--surface);
  color: var(--accent);
}

.accordion-button:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 0.2rem rgba(255,107,53,0.12);
}

.accordion-button::after {
  filter: none;
}

/* --- List group --- */
.list-group-item {
  background-color: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

/* --- Pre / code blocks --- */
pre {
  background-color: var(--bg) !important;
  color: var(--text);
  border-color: var(--border) !important;
  font-family: 'JetBrains Mono', 'Consolas', monospace;
  font-size: 0.8125rem;
}

[data-theme="dark"] pre.bg-light {
  background-color: var(--surface) !important;
  color: var(--text);
}

/* --- hr divider --- */
hr {
  border-color: var(--border);
  opacity: 1;
}

/* --- form-text --- */
.form-text {
  color: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .agent-title-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .agent-title-bar .agent-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

@media (max-width: 576px) {
  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  .stat-value {
    font-size: 1.5rem;
  }
}

/* --- Utility --- */
.text-mono {
  font-family: 'JetBrains Mono', 'Cascadia Code', 'Consolas', monospace;
  font-size: 0.8125rem;
}

/* --- Setup Workflow Steps --- */
.workflow-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  margin-bottom: 0.625rem;
}

.workflow-step-fields {
  margin-top: 0.25rem;
}

.workflow-step .form-select-sm,
.workflow-step .form-control-sm {
  font-size: 0.8125rem;
  border-radius: 6px;
}

.remove-step-btn {
  padding: 0.2rem 0.5rem;
  font-size: 1rem;
  line-height: 1;
  border-radius: 6px;
}