/* 
   Elite CRM Design System 
   Modern, Clean, Professional
*/

:root {
  /* Brand Colors */
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;
  --secondary-500: #8b5cf6;
  
  /* Neutral Colors */
  --gray-25: #fcfcfd;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Semantic Colors */
  --success-50: #ecfdf5;
  --success-500: #10b981;
  --success-700: #047857;
  --warning-50: #fffbeb;
  --warning-500: #f59e0b;
  --warning-700: #b45309;
  --danger-50: #fef2f2;
  --danger-500: #ef4444;
  --danger-700: #b91c1c;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 10px 10px -5px rgb(0 0 0 / 0.04);
  
  /* Layout */
  --sidebar-width: 280px;
  --header-height: 64px;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--gray-900);
  font-weight: 600;
  letter-spacing: -0.025em;
}

h1 { font-size: 1.875rem; line-height: 2.25rem; }
h2 { font-size: 1.5rem; line-height: 2rem; }
h3 { font-size: 1.25rem; line-height: 1.75rem; }

/* Layout Structure */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 50;
  background-color: white;
  left: 0;
  top: 0;
}

.sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  border-bottom: 1px solid var(--gray-100);
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-600);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-nav {
  padding: 1.5rem 1rem;
  flex: 1;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--gray-600);
  border-radius: var(--radius-md);
  margin-bottom: 0.25rem;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-item:hover {
  background-color: var(--gray-50);
  color: var(--gray-900);
}

.nav-item.active {
  background-color: var(--primary-50);
  color: var(--primary-700);
}

.nav-icon {
  width: 20px;
  height: 20px;
  opacity: 0.7;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  background-color: var(--gray-50);
  min-height: 100vh;
  width: calc(100% - var(--sidebar-width));
}

.top-header {
  height: var(--header-height);
  background: white;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 40;
}

.page-content {
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

/* Header Elements */
.page-header {
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.page-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--gray-900);
}

.page-subtitle {
  color: var(--gray-500);
  margin-top: 0.5rem;
}

/* Components: Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
  line-height: 1.25rem;
}

.btn-primary {
  background-color: var(--primary-600);
  color: white;
  box-shadow: 0 1px 2px 0 rgb(79 70 229 / 0.2);
}

.btn-primary:hover {
  background-color: var(--primary-700);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: white;
  border-color: var(--gray-300);
  color: var(--gray-700);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--gray-50);
  border-color: var(--gray-400);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

.btn-success {
  background-color: var(--success-500);
  color: white;
}

.btn-danger {
  background-color: var(--danger-500);
  color: white;
}

/* Components: Cards */
.card {
  background: white;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.card-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-900);
}

.card-body {
  padding: 1.5rem;
}

/* Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.metric-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.metric-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.metric-label {
  color: var(--gray-500);
  font-size: 0.875rem;
  font-weight: 500;
}

.metric-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  background-color: var(--primary-50);
  color: var(--primary-600);
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.025em;
}

.metric-trend {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.trend-up { color: var(--success-700); }
.trend-down { color: var(--danger-700); }

/* Grid Layouts */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* Pipeline */
.pipeline-container {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  padding-bottom: 1.5rem;
}

.pipeline-column {
  min-width: 320px;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid var(--gray-200);
}

.pipeline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--gray-200);
  font-weight: 600;
  color: var(--gray-700);
}

.deal-card {
  background: white;
  padding: 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  margin-bottom: 0.75rem;
  cursor: grab;
  transition: transform 0.2s, box-shadow 0.2s;
}

.deal-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-100);
}

.deal-amount {
  font-weight: 700;
  color: var(--gray-900);
  margin-top: 0.5rem;
}

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

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

th {
  text-align: left;
  padding: 0.875rem 1.5rem;
  background-color: var(--gray-50);
  color: var(--gray-600);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--gray-200);
}

td {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
  font-size: 0.875rem;
}

tr:hover td {
  background-color: var(--gray-25);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
}

.badge-gray { background: var(--gray-100); color: var(--gray-700); }
.badge-blue { background: var(--primary-50); color: var(--primary-700); }
.badge-green { background: var(--success-50); color: var(--success-700); }
.badge-yellow { background: var(--warning-50); color: var(--warning-700); }
.badge-red { background: var(--danger-50); color: var(--danger-700); }

/* Activity Feed */
.activity-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--gray-100);
}

.activity-item:last-child { border-bottom: none; }

.activity-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.activity-content h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-900);
}

.activity-meta {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 0.25rem;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 0.5rem;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--gray-900);
  transition: all 0.2s;
  background-color: white;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

/* Search Bar */
.search-container {
  position: relative;
  max-width: 400px;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 0.625rem 1rem 0.625rem 2.5rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--gray-900);
  transition: all 0.2s;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

.search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
}

/* Utils - Display & Flex */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.inline { display: inline; }
.inline-flex { display: inline-flex; }
.hidden { display: none; }
.block { display: block; }
.grid { display: grid; }

/* Flex Alignment */
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

/* Gap */
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-6 { gap: 1.5rem; }

/* Spacing - Margin */
.m-0 { margin: 0; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mt-12 { margin-top: 3rem; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.ml-1 { margin-left: 0.25rem; }
.mr-2 { margin-right: 0.5rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Spacing - Padding */
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.pt-3 { padding-top: 0.75rem; }
.pt-6 { padding-top: 1.5rem; }
.pb-3 { padding-bottom: 0.75rem; }
.pb-6 { padding-bottom: 1.5rem; }
.pl-8 { padding-left: 2rem; }
.pr-8 { padding-right: 2rem; }

/* Width & Height */
.w-4 { width: 1rem; }
.w-5 { width: 1.25rem; }
.w-8 { width: 2rem; }
.w-10 { width: 2.5rem; }
.w-12 { width: 3rem; }
.w-16 { width: 4rem; }
.w-32 { width: 8rem; }
.w-full { width: 100%; }
.h-1 { height: 0.25rem; }
.h-1\.5 { height: 0.375rem; }
.h-2 { height: 0.5rem; }
.h-4 { height: 1rem; }
.h-5 { height: 1.25rem; }
.h-8 { height: 2rem; }
.h-10 { height: 2.5rem; }
.h-12 { height: 3rem; }
.h-16 { height: 4rem; }
.h-full { height: 100%; }
.min-h-\[200px\] { min-height: 200px; }
.max-w-xs { max-width: 20rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-2xl { max-width: 42rem; }
.max-w-3xl { max-width: 48rem; }
.max-h-96 { max-height: 24rem; }

/* Typography */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.uppercase { text-transform: uppercase; }
.capitalize { text-transform: capitalize; }
.tracking-wider { letter-spacing: 0.05em; }
.leading-tight { line-height: 1.25; }
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.whitespace-nowrap { white-space: nowrap; }
.whitespace-pre-wrap { white-space: pre-wrap; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.line-through { text-decoration: line-through; }
.underline { text-decoration: underline; }

/* Text Colors */
.text-white { color: white; }
.text-gray-300 { color: var(--gray-300); }
.text-gray-400 { color: var(--gray-400); }
.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-700 { color: var(--gray-700); }
.text-gray-800 { color: var(--gray-800); }
.text-gray-900 { color: var(--gray-900); }
.text-primary-500 { color: var(--primary-500); }
.text-primary-600 { color: var(--primary-600); }
.text-primary-700 { color: var(--primary-700); }
.text-primary-900 { color: #312e81; }
.text-success-500 { color: var(--success-500); }
.text-success-600 { color: #059669; }
.text-success-700 { color: var(--success-700); }
.text-warning-500 { color: var(--warning-500); }
.text-danger-500 { color: var(--danger-500); }
.text-danger-700 { color: var(--danger-700); }
.text-red-500 { color: #ef4444; }
.text-red-600 { color: #dc2626; }
.text-blue-600 { color: #2563eb; }
.text-blue-700 { color: #1d4ed8; }
.text-blue-800 { color: #1e40af; }
.text-green-600 { color: #16a34a; }
.text-purple-600 { color: #9333ea; }
.text-orange-600 { color: #ea580c; }
.text-yellow-600 { color: #ca8a04; }
.text-yellow-700 { color: #a16207; }
.text-yellow-800 { color: #854d0e; }

/* Background Colors */
.bg-white { background-color: white; }
.bg-transparent { background-color: transparent; }
.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }
.bg-gray-200 { background-color: var(--gray-200); }
.bg-gray-400 { background-color: var(--gray-400); }
.bg-gray-900 { background-color: var(--gray-900); }
.bg-primary-50 { background-color: var(--primary-50); }
.bg-primary-100 { background-color: var(--primary-100); }
.bg-primary-500 { background-color: var(--primary-500); }
.bg-success-50 { background-color: var(--success-50); }
.bg-success-100 { background-color: #d1fae5; }
.bg-success-500 { background-color: var(--success-500); }
.bg-warning-50 { background-color: var(--warning-50); }
.bg-warning-500 { background-color: var(--warning-500); }
.bg-danger-50 { background-color: var(--danger-50); }
.bg-red-50 { background-color: #fef2f2; }
.bg-red-100 { background-color: #fee2e2; }
.bg-blue-50 { background-color: #eff6ff; }
.bg-blue-100 { background-color: #dbeafe; }
.bg-green-50 { background-color: #f0fdf4; }
.bg-green-100 { background-color: #dcfce7; }
.bg-purple-50 { background-color: #faf5ff; }
.bg-purple-100 { background-color: #f3e8ff; }
.bg-orange-100 { background-color: #ffedd5; }
.bg-yellow-50 { background-color: #fefce8; }

/* Borders */
.border { border-width: 1px; border-style: solid; }
.border-0 { border-width: 0; }
.border-2 { border-width: 2px; }
.border-4 { border-width: 4px; }
.border-t { border-top-width: 1px; border-top-style: solid; }
.border-b { border-bottom-width: 1px; border-bottom-style: solid; }
.border-b-2 { border-bottom-width: 2px; border-bottom-style: solid; }
.border-l-4 { border-left-width: 4px; border-left-style: solid; }
.border-transparent { border-color: transparent; }
.border-gray-50 { border-color: var(--gray-50); }
.border-gray-100 { border-color: var(--gray-100); }
.border-gray-200 { border-color: var(--gray-200); }
.border-gray-300 { border-color: var(--gray-300); }
.border-primary-100 { border-color: var(--primary-100); }
.border-primary-500 { border-color: var(--primary-500); }
.border-success-100 { border-color: #d1fae5; }
.border-blue-100 { border-color: #dbeafe; }
.border-yellow-100 { border-color: #fef3c7; }
.border-l-primary-500 { border-left-color: var(--primary-500); }
.border-l-success-500 { border-left-color: var(--success-500); }
.border-l-danger-500 { border-left-color: var(--danger-500); }
.border-b-primary-100 { border-bottom-color: var(--primary-100); }
.border-t-transparent { border-top-color: transparent; }
.border-dashed { border-style: dashed; }

/* Border Radius */
.rounded { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: 9999px; }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.inset-0 { top: 0; right: 0; bottom: 0; left: 0; }
.top-0 { top: 0; }
.left-0 { left: 0; }
.left-3 { left: 0.75rem; }
.left-4 { left: 1rem; }
.left-9 { left: 2.25rem; }
.right-0 { right: 0; }
.right-3 { right: 0.75rem; }
.bottom-0 { bottom: 0; }
.top-10 { top: 2.5rem; }
.top-1\/2 { top: 50%; }
.left-1\/2 { left: 50%; }
.-translate-x-1\/2 { transform: translateX(-50%); }
.-translate-y-1\/2 { transform: translateY(-50%); }
.transform { transform: translateX(var(--tw-translate-x, 0)) translateY(var(--tw-translate-y, 0)); }
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }
.-ml-px { margin-left: -1px; }

/* Flexbox Shrink */
.shrink-0 { flex-shrink: 0; }

/* Grid */
.col-span-1 { grid-column: span 1; }
.col-span-2 { grid-column: span 2; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Dividers */
.divide-y > * + * { border-top-width: 1px; border-top-style: solid; }
.divide-gray-100 > * + * { border-color: var(--gray-100); }
.space-y-1 > * + * { margin-top: 0.25rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }
.space-y-4 > * + * { margin-top: 1rem; }

/* Opacity & Visibility */
.opacity-0 { opacity: 0; }
.opacity-70 { opacity: 0.7; }
.bg-opacity-50 { --tw-bg-opacity: 0.5; }
.bg-gray-900.bg-opacity-50 { background-color: rgb(17 24 39 / 0.5); }

/* Transitions & Animations */
.transition { transition-property: all; transition-duration: 150ms; transition-timing-function: ease-in-out; }
.transition-all { transition-property: all; transition-duration: 150ms; transition-timing-function: ease-in-out; }
.transition-colors { transition-property: color, background-color, border-color; transition-duration: 150ms; }
.transition-opacity { transition-property: opacity; transition-duration: 150ms; }
.duration-200 { transition-duration: 200ms; }

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.animate-spin { animation: spin 1s linear infinite; }
.animate-in { animation: fadeIn 0.3s ease-out; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cursors */
.cursor-pointer { cursor: pointer; }
.cursor-move { cursor: move; }

/* Hover States */
.hover\:bg-gray-50:hover { background-color: var(--gray-50); }
.hover\:bg-gray-100:hover { background-color: var(--gray-100); }
.hover\:bg-primary-50:hover { background-color: var(--primary-50); }
.hover\:bg-green-200:hover { background-color: #bbf7d0; }
.hover\:bg-blue-200:hover { background-color: #bfdbfe; }
.hover\:bg-red-200:hover { background-color: #fecaca; }
.hover\:text-gray-600:hover { color: var(--gray-600); }
.hover\:text-gray-700:hover { color: var(--gray-700); }
.hover\:text-gray-900:hover { color: var(--gray-900); }
.hover\:text-primary-600:hover { color: var(--primary-600); }
.hover\:underline:hover { text-decoration: underline; }
.hover\:shadow-md:hover { box-shadow: var(--shadow-md); }
.hover\:border-primary-500:hover { border-color: var(--primary-500); }

/* Group Hover */
.group:hover .group-hover\:opacity-100 { opacity: 1; }
.group:hover .group-hover\:flex { display: flex; }

/* Peer States (for radio/checkbox styling) */
.peer:checked ~ .peer-checked\:bg-primary-50 { background-color: var(--primary-50); }
.peer:checked ~ .peer-checked\:border-primary-500 { border-color: var(--primary-500); }
.peer:checked ~ .peer-checked\:text-primary-700 { color: var(--primary-700); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

/* Accent Color */
.accent-primary-600 { accent-color: var(--primary-600); }

/* Font Family */
.font-mono { font-family: ui-monospace, monospace; }

/* Last child */
.last\:border-0:last-child { border-width: 0; }

@media (max-width: 1024px) {
  .sidebar { display: none; } /* Mobile menu implementation needed later */
  .main-content { margin-left: 0; width: 100%; }
  .grid-cols-2, .grid-cols-3 { grid-template-columns: 1fr; }
}