:root {
  /* Colors */
  --primary: #0066FF;
  --primary-hover: #0052cc;
  --secondary: #FF9900;
  --secondary-hover: #e68a00;
  --bg-body: #F5F7FA;
  --bg-card: #FFFFFF;
  --text-main: #1F2937;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* 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;
  margin: 0;
  padding: 0;
}

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

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

ul {
  list-style: none;
}

/* Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--spacing-sm); }
.gap-4 { gap: var(--spacing-md); }
.w-full { width: 100%; }

.text-center { text-align: center; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.font-bold { font-weight: 700; }
.text-primary { color: var(--primary); }
.text-muted { color: var(--text-muted); }

.bg-white { background-color: var(--bg-card); }
.shadow-md { box-shadow: var(--shadow-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.p-4 { padding: var(--spacing-md); }
.p-6 { padding: var(--spacing-lg); }
.m-4 { margin: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-md); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
  border: none;
}

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

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

.btn-outline {
  background-color: transparent;
  border: 1px solid var(--border);
  color: var(--text-main);
}
.btn-outline:hover {
  background-color: #f9fafb;
}

/* Forms */
.form-input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-top: 0.25rem;
}
.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.125rem 0.625rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-blue { background-color: #DBEAFE; color: #1E40AF; }
.badge-green { background-color: #D1FAE5; color: #065F46; }
.badge-yellow { background-color: #FEF3C7; color: #92400E; }
.badge-red { background-color: #FEE2E2; color: #991B1B; }