/* ═══════════════════════════════════════════════════════════════════
   Nexus Panel – Dark Theme
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --bg-primary:   #0f0f23;
  --bg-secondary: #16213e;
  --bg-tertiary:  #1a1a3e;
  --bg-hover:     #1e2a4a;
  --bg-active:    #243356;
  --border:       #2a2a5a;
  --border-light: #333370;

  --text-primary:   #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted:     #64748b;

  --accent:        #6366f1;
  --accent-hover:  #818cf8;
  --accent-dim:    rgba(99,102,241,0.15);

  --success:       #22c55e;
  --success-dim:   rgba(34,197,94,0.15);
  --warning:       #f59e0b;
  --warning-dim:   rgba(245,158,11,0.15);
  --danger:        #ef4444;
  --danger-dim:    rgba(239,68,68,0.15);
  --info:          #3b82f6;
  --info-dim:      rgba(59,130,246,0.15);

  --sidebar-w:     260px;
  --radius:        8px;
  --radius-sm:     6px;
  --transition:    150ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow: hidden;
}

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

/* ── Sidebar ────────────────────────────────────────────────── */

.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  padding: 1.25rem 1rem;
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 28px; height: 28px;
  color: var(--accent);
}

.logo-text {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sidebar-nav {
  flex: 1;
  padding: 0.75rem 0;
}

.nav-section { margin-bottom: 0.5rem; }

.nav-section-title {
  padding: 0.5rem 1.25rem;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.25rem;
  color: var(--text-secondary);
  transition: all var(--transition);
  border-left: 3px solid transparent;
  font-size: 0.875rem;
}

.nav-item svg {
  width: 18px; height: 18px;
  flex-shrink: 0;
  stroke-width: 1.8;
}

.nav-item:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.nav-item.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-left-color: var(--accent);
}

.sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border);
}

.node-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.node-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.version-text {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ── Main ───────────────────────────────────────────────────── */

.main {
  margin-left: var(--sidebar-w);
  height: 100vh;
  overflow-y: auto;
  padding: 2rem;
}

/* ── Page Header ────────────────────────────────────────────── */

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.header-actions { display: flex; gap: 0.5rem; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb svg { color: var(--text-muted); }

/* ── Stats Grid ─────────────────────────────────────────────── */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

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

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 0.25rem;
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ── Cards ──────────────────────────────────────────────────── */

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

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

.card-header h2, .card-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

/* ── Tables ─────────────────────────────────────────────────── */

.table-wrap { overflow-x: auto; }

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th {
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
  border-bottom: 1px solid var(--border);
  background: var(--bg-tertiary);
}

.table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.table tr:hover td { background: var(--bg-hover); }
.table tr:last-child td { border-bottom: none; }

.server-cell {
  display: flex;
  flex-direction: column;
}

.server-name {
  font-weight: 600;
  color: var(--text-primary);
}

.server-id {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: monospace;
}

/* ── Badges ─────────────────────────────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
}

.badge-success { background: var(--success-dim); color: var(--success); }
.badge-success .badge-dot { background: var(--success); }
.badge-warning { background: var(--warning-dim); color: var(--warning); }
.badge-warning .badge-dot { background: var(--warning); }
.badge-danger  { background: var(--danger-dim);  color: var(--danger); }
.badge-danger .badge-dot  { background: var(--danger); }
.badge-info    { background: var(--info-dim);    color: var(--info); }
.badge-info .badge-dot    { background: var(--info); }
.badge-muted   { background: rgba(100,116,139,0.15); color: var(--text-muted); }
.badge-muted .badge-dot   { background: var(--text-muted); }

/* ── Buttons ────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn:hover { background: var(--bg-hover); border-color: var(--border-light); }

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

.btn-danger {
  background: transparent;
  border-color: var(--danger);
  color: var(--danger);
}
.btn-danger:hover { background: var(--danger-dim); }

.btn-success {
  background: transparent;
  border-color: var(--success);
  color: var(--success);
}
.btn-success:hover { background: var(--success-dim); }

.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.8rem; }
.btn-xs { padding: 0.2rem 0.5rem; font-size: 0.75rem; }

.btn-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.5rem;
  line-height: 1;
  padding: 0;
}
.btn-icon:hover { color: var(--text-primary); }

.btn-group { display: flex; gap: 0.35rem; }

/* ── Inputs ─────────────────────────────────────────────────── */

.search-input, .form-input, select.form-input, textarea.form-input {
  padding: 0.5rem 0.75rem;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--transition);
}

.search-input:focus, .form-input:focus {
  border-color: var(--accent);
}

.search-input { width: 220px; }
textarea.form-input { resize: vertical; font-family: monospace; }

.form-group { margin-bottom: 1rem; }
.form-label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 0.35rem; }

/* ── Console ────────────────────────────────────────────────── */

.console-container {
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
}

.terminal-box {
  height: 420px;
  padding: 0.5rem;
}

.console-input-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: #111;
  border-top: 1px solid #333;
}

.console-prompt {
  color: var(--success);
  font-family: monospace;
  font-weight: 700;
}

.console-input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: monospace;
  font-size: 0.9rem;
  outline: none;
}

/* ── File Manager ───────────────────────────────────────────── */

.file-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.file-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.85rem;
}

.file-breadcrumb a { color: var(--text-muted); }
.file-breadcrumb a:hover { color: var(--accent); }
.file-breadcrumb .separator { color: var(--text-muted); }
.file-actions { display: flex; gap: 0.35rem; }

.file-icon {
  display: inline-flex;
  margin-right: 0.5rem;
  color: var(--text-muted);
}

.file-icon.dir { color: var(--accent); }

.file-name-link {
  color: var(--text-primary);
  cursor: pointer;
}
.file-name-link:hover { color: var(--accent); }

/* ── Tabs ───────────────────────────────────────────────────── */

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.25rem;
}

.tab {
  padding: 0.75rem 1.25rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.tab:hover { color: var(--text-primary); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-content.hidden { display: none; }

/* ── Detail Status Bar ──────────────────────────────────────── */

.detail-status-bar {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1.25rem;
}

.status-item {
  display: flex;
  flex-direction: column;
}

.status-item-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-item-value {
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 0.15rem;
}

/* ── Blueprint Grid ─────────────────────────────────────────── */

.blueprint-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.blueprint-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color var(--transition);
  cursor: pointer;
}
.blueprint-card:hover { border-color: var(--accent); }

.blueprint-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.blueprint-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.blueprint-tags { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.blueprint-tag {
  padding: 0.15rem 0.45rem;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 4px;
  font-size: 0.7rem;
}

/* ── Feature Grid ───────────────────────────────────────────── */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.feature-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.feature-card h4 { font-size: 0.85rem; font-weight: 500; }

/* ── Modal ──────────────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
}

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

.modal-header h2 { font-size: 1.1rem; }

.modal-body { padding: 1.25rem; }

/* ── Toast ──────────────────────────────────────────────────── */

.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  animation: toast-in 0.3s ease;
  min-width: 250px;
  max-width: 400px;
}

.toast-success { background: var(--success-dim); color: var(--success); border: 1px solid var(--success); }
.toast-error   { background: var(--danger-dim);  color: var(--danger);  border: 1px solid var(--danger); }
.toast-info    { background: var(--info-dim);    color: var(--info);    border: 1px solid var(--info); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(1rem); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ── Empty State ────────────────────────────────────────────── */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 3rem 1rem;
  color: var(--text-muted);
}

/* ── Settings Key-Value ─────────────────────────────────────── */

.kv-row {
  display: flex;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.kv-row:last-child { border-bottom: none; }

.kv-key {
  width: 200px;
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: monospace;
}

.kv-value {
  font-size: 0.85rem;
  color: var(--text-primary);
  word-break: break-all;
}

/* ── Utilities ──────────────────────────────────────────────── */

.hidden { display: none !important; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.8rem; }
.text-xs { font-size: 0.75rem; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.gap-1 { gap: 0.5rem; }
.flex { display: flex; }
.items-center { align-items: center; }

/* ── Scrollbar ──────────────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ── Responsive ─────────────────────────────────────────────── */

@media (max-width: 768px) {
  .sidebar { width: 60px; }
  .sidebar .logo-text,
  .sidebar .nav-section-title,
  .sidebar .node-badge span:not(.node-dot),
  .sidebar .version-text { display: none; }
  .sidebar .nav-item { justify-content: center; padding: 0.75rem; border-left: none; }
  .main { margin-left: 60px; padding: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}