:root {
  /* Colors */
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --secondary: #64748B;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --background: #F3F4F6;
  --surface: #FFFFFF;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--background);
  color: var(--text-main);
  margin: 0;
  line-height: 1.5;
  min-height: 100vh;
}

/* Layout */
.container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  width: 100%;
}

.main-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Navbar */
.navbar {
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.9);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--text-main);
  line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 var(--spacing-md) 0; color: var(--text-muted); }

/* Components */
.card {
  background-color: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  border: 1px solid rgba(0,0,0,0.02);
  overflow: hidden;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-size: 0.95rem;
  gap: var(--spacing-sm);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  color: white;
  box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 8px -1px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background-color: white;
  border: 1px solid var(--border);
  color: var(--text-main);
}

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

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

.btn-full {
  width: 100%;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary { background-color: #DBEAFE; color: #1E40AF; }
.badge-success { background-color: #D1FAE5; color: #065F46; }
.badge-warning { background-color: #FEF3C7; color: #92400E; }
.badge-danger { background-color: #FEE2E2; color: #991B1B; }
.badge-neutral { background-color: #F3F4F6; color: #4B5563; }

/* Grid System */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-lg); }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--text-main);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Auth Pages */
.auth-layout {
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #EFF6FF 0%, #FFFFFF 100%);
  padding: var(--spacing-md);
}

.auth-card {
  max-width: 480px;
  width: 100%;
  text-align: center;
  padding: 48px 32px;
}

.auth-icon {
  width: 64px;
  height: 64px;
  background: var(--primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px auto;
}

.auth-title {
  color: var(--primary);
  margin-bottom: 8px;
}

.auth-subtitle {
  font-size: 1.1rem;
  margin-bottom: 32px;
}

.auth-footer {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.auth-footer p {
  font-size: 0.85rem;
  margin: 0;
}

.auth-branding {
  display: none;
}

/* Responsive Desktop Styles */
@media (min-width: 1200px) {
  :root {
    --spacing-md: 20px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
  }

  body {
    font-size: 16px; /* Ensure base font size is good */
  }

  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }

  /* Layout Enhancements */
  .container {
    max-width: 1400px;
    padding: 0 var(--spacing-lg);
  }

  /* Grid Enhancements */
  .grid-2 { 
    grid-template-columns: 1fr 1fr; 
    gap: var(--spacing-xl);
  }
  
  .grid-3 { 
    grid-template-columns: repeat(3, 1fr); 
    gap: var(--spacing-xl);
  }
  
  .grid-4 { 
    grid-template-columns: repeat(4, 1fr); 
    gap: var(--spacing-xl);
  }

  /* Split Screen Auth Layout */
  .auth-layout {
    flex-direction: row;
    padding: 0;
    align-items: stretch;
    background: white;
  }

  .auth-branding {
    display: flex;
    flex: 1;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
    color: white;
    flex-direction: column;
    justify-content: center;
    padding: 0 80px;
  }
  
  .auth-branding h1 {
    color: white;
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
  }

  .auth-card {
    width: 600px; /* Fixed wider width for desktop login */
    max-width: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 80px;
    box-shadow: none; /* Remove card shadow in split view */
    background: transparent;
    border: none;
    border-left: 1px solid var(--border);
    margin-bottom: 0;
    border-radius: 0;
  }

  /* Navigation Optimization */
  .navbar {
    padding: var(--spacing-lg) 0;
  }

  .nav-link {
    font-size: 1.1rem;
    padding: 8px 16px;
    border-radius: var(--radius-md);
  }

  .nav-link:hover {
    background-color: rgba(37, 99, 235, 0.05);
  }

  /* Dashboard Grid */
  .dashboard-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
  }

  /* Cards utilization of space */
  .card {
    padding: var(--spacing-xl);
  }
}

/* Specific Dashboard Elements */
.stat-card {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  color: var(--text-muted);
  font-weight: 500;
}

/* Queue List */
.queue-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.queue-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.2s;
}

.queue-item:hover {
  border-color: var(--primary);
  background-color: #F8FAFC;
}

.queue-item.active {
  border-color: var(--primary);
  background-color: #EFF6FF;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--spacing-lg);
  border-left: 2px solid var(--border);
  margin: var(--spacing-lg) 0;
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.timeline-dot {
  position: absolute;
  left: -29px; /* adjust based on border and padding */
  top: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--primary);
  border: 2px solid white;
  box-shadow: 0 0 0 2px var(--primary);
}

.user-avatar {
  width: 40px;
  height: 40px;
  background-color: #E0E7FF;
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.placeholder-image {
  background-color: #E2E8F0;
  width: 100%;
  height: 200px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}