:root {
  /* Color Palette - Executive Modern */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-accent: #1e293b;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --text-on-accent: #f8fafc;
  --accent-blue: #2563eb;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;
  --border-color: #e2e8f0;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --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);
  
  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Layout */
.dashboard-container {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background-color: var(--bg-accent);
  color: var(--text-on-accent);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--accent-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.5px;
}

.nav-menu {
  list-style: none;
  flex-grow: 1;
}

.nav-item {
  margin-bottom: var(--space-sm);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  text-decoration: none;
  color: #94a3b8;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
  font-weight: 500;
}

.nav-link:hover, .nav-link.active {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--text-on-accent);
}

.sidebar-footer {
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Main Content */
.main-content {
  padding: var(--space-xl);
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: var(--space-xl);
}

.header-title h1 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-xs);
}

.header-title p {
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  gap: var(--space-md);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.stat-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.stat-trend {
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

.trend-up { color: var(--accent-green); }
.trend-down { color: var(--accent-red); }

/* Charts Layout */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.chart-container {
  background: var(--bg-secondary);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  min-height: 400px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
}

.chart-title {
  font-weight: 700;
  font-size: 1.1rem;
}

/* Data Table */
.table-container {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

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

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

th {
  text-align: left;
  padding: var(--space-md) var(--space-lg);
  background: #f1f5f9;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
}

td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
}

.status-badge {
  padding: 4px 8px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-new { background: #dcfce7; color: #166534; }
.status-contacted { background: #dbeafe; color: #1e40af; }
.status-qualified { background: #fef9c3; color: #854d0e; }
.status-negotiation { background: #fce7f3; color: #9d174d; }
.status-closed { background: #1e293b; color: #ffffff; }

/* Buttons */
.btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
  font-size: 0.875rem;
  border: none;
}

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

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Visual Components */
.bar-chart-visual {
  display: flex;
  align-items: flex-end;
  gap: var(--space-md);
  height: 250px;
  padding: var(--space-lg) 0;
}

.bar-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  height: 100%;
  justify-content: flex-end;
}

.bar {
  width: 100%;
  background: var(--accent-blue);
  border-radius: 4px 4px 0 0;
  min-height: 20px;
  transition: height 1s ease-out;
}

.bar-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
}

.funnel-visual {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.funnel-step {
  height: 40px;
  display: flex;
  align-items: center;
  padding: 0 var(--space-md);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
}

/* Placeholder Helpers */
.placeholder-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #cbd5e1;
}

@media (max-width: 1024px) {
  .dashboard-container {
    grid-template-columns: 1fr;
  }
  .sidebar {
    display: none;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .charts-grid {
    grid-template-columns: 1fr;
  }
}