/* ==============================================================================
   Kryzo Control Plane — Professional Infrastructure Design System
   Designed for high-density, low-latency enterprise server administration
   ============================================================================== */

:root {
  --bg-canvas: #090d16;
  --bg-surface: #0f172a;
  --bg-elevated: #1e293b;
  --bg-subtle: #172033;
  --bg-hover: #334155;
  
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.2);

  --accent-primary: #38bdf8;
  --accent-primary-hover: #0ea5e9;
  --accent-surface: rgba(56, 189, 248, 0.1);
  --accent-border: rgba(56, 189, 248, 0.25);

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --info: #6366f1;
  --info-bg: rgba(99, 102, 241, 0.12);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-inverse: #090d16;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;

  --sidebar-width: 240px;
  --header-height: 56px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-canvas);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Layout Structure */
#app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* Sidebar */
aside.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  user-select: none;
}

.brand-section {
  height: var(--header-height);
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.brand-logo-mark {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, #38bdf8, #2563eb);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 14px;
  letter-spacing: -0.5px;
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.5px;
  color: #fff;
}

.brand-subtitle {
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav-section {
  flex: 1;
  overflow-y: auto;
  padding: 12px 8px;
}

.nav-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-dim);
  padding: 8px 10px 4px 10px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 500;
  margin-bottom: 2px;
  transition: background 0.1s, color 0.1s;
}

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

.nav-item.active {
  background: var(--accent-surface);
  color: var(--accent-primary);
  border: 1px solid var(--accent-border);
  font-weight: 600;
}

.nav-icon {
  font-size: 14px;
  width: 18px;
  display: inline-flex;
  justify-content: center;
}

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-subtle);
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Main Area */
main.main-viewport {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-canvas);
}

/* Header */
header.app-header {
  height: var(--header-height);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.view-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

.tenant-badge {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

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

.status-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-elevated);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  font-size: 11px;
  font-weight: 600;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

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

/* Content Panels */
.content-area {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

/* Grid & Cards */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.metric-value {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin-top: 4px;
  font-family: var(--font-mono);
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
}

.card-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-subtle);
}

.card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

/* Data Tables */
.table-wrapper {
  overflow-x: auto;
  width: 100%;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 12px;
}

table.data-table th {
  background: var(--bg-elevated);
  padding: 8px 12px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border-subtle);
}

table.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-main);
  vertical-align: middle;
}

table.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.badge-default { background: var(--bg-elevated); color: var(--text-muted); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-accent { background: var(--accent-surface); color: var(--accent-primary); border: 1px solid var(--accent-border); }

.code-pill {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.35);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  color: #38bdf8;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.12s;
  user-select: none;
}

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

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

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

.btn-secondary:hover {
  background: var(--bg-hover);
}

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

.btn-danger:hover {
  background: #dc2626;
}

.btn-sm {
  padding: 3px 8px;
  font-size: 11px;
}

/* Inputs */
.search-input, .input-text {
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 12px;
  font-family: var(--font-sans);
  outline: none;
  transition: border-color 0.12s;
}

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

.search-input {
  width: 220px;
}

/* Modal Dialogs */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(2px);
}

.modal-content {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 580px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.modal-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
}

.modal-body {
  padding: 18px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-footer {
  padding: 12px 18px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background: var(--bg-subtle);
}

/* Diff Viewer */
.diff-box {
  background: #050811;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
}

.diff-line-add { color: #34d399; background: rgba(52, 211, 153, 0.1); }
.diff-line-del { color: #f87171; background: rgba(248, 113, 113, 0.1); }
.diff-line-ctx { color: var(--text-muted); }

/* Toasts */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-main);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideIn 0.15s ease-out;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.warning { border-left: 3px solid var(--warning); }

@keyframes slideIn {
  from { transform: translateX(30px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}