/* Modern SaaS Enterprise Theme (Light Theme Optimized for Clean Aesthetics) */
:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --secondary: #0f172a;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --radius: 10px;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
}

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

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: white;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--secondary);
}

.brand-badge {
  font-size: 0.75rem;
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 9999px;
  font-weight: 600;
  border: 1px solid #bfdbfe;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.tenant-pill {
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tenant-pill strong {
  color: var(--primary);
}

/* Main Layout */
.app-container {
  display: flex;
  min-height: calc(100vh - 61px);
}

/* Sidebar Navigation */
.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.15s ease;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: #f1f5f9;
  color: var(--secondary);
}

.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

.nav-icon {
  font-size: 1.15rem;
}

/* Content Area */
.main-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
  max-width: 1400px;
  margin: 0 auto;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.75rem;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary);
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 4px;
}

/* Cards & Grid */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

@media (max-width: 1024px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow);
}

.metric-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.metric-value {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--secondary);
  line-height: 1.2;
}

.metric-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

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

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

.btn-outline {
  background: white;
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

.btn-sm {
  padding: 0.25rem 0.65rem;
  font-size: 0.8rem;
}

.btn-danger {
  background: var(--danger-light);
  color: var(--danger);
  border-color: #fecaca;
}

.btn-danger:hover {
  background: #fee2e2;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
}

th {
  padding: 0.75rem 1rem;
  background: #f8fafc;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: #fbfcfe;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid #a7f3d0;
}

.badge-warning {
  background: var(--warning-light);
  color: var(--warning);
  border: 1px solid #fde68a;
}

.badge-danger {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid #fecaca;
}

.badge-gray {
  background: #f1f5f9;
  color: #64748b;
  border: 1px solid #e2e8f0;
}

/* Progress bar */
.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: #e2e8f0;
  border-radius: 9999px;
  overflow: hidden;
  margin-top: 6px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 9999px;
  transition: width 0.3s ease;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(2px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: var(--bg-card);
  border-radius: var(--radius);
  width: 100%;
  max-width: 580px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  animation: modalIn 0.15s ease-out;
}

@keyframes modalIn {
  from {
    transform: scale(0.96);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--secondary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  background: #f8fafc;
  border-bottom-left-radius: var(--radius);
  border-bottom-right-radius: var(--radius);
}

/* Form inputs */
.form-group {
  margin-bottom: 1.15rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-size: 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  outline: none;
  font-family: inherit;
  transition: border-color 0.15s;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* Simulator Pipeline Visualizer */
.pipeline-step {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: #ffffff;
  margin-bottom: 0.75rem;
  transition: all 0.2s;
}

.pipeline-step.active {
  border-color: #93c5fd;
  background: #f8fbff;
}

.pipeline-step.completed {
  border-color: #a7f3d0;
  background: #f0fdf4;
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #e2e8f0;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.pipeline-step.completed .step-num {
  background: var(--success);
  color: white;
}

.step-info {
  flex: 1;
}

.step-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--secondary);
}

.step-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.code-box {
  background: #0f172a;
  color: #e2e8f0;
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.8rem;
  overflow-x: auto;
  margin-top: 0.5rem;
}