:root {
  --primary-color: #3B82F6;
  --primary-dark: #2563EB;
  --secondary-color: #10B981;
  --accent-color: #F59E0B;
  --dark-color: #1F2937;
  --light-color: #F9FAFB;
  --text-primary: #111827;
  --text-secondary: #6B7280;
  --border-color: #E5E7EB;
  --success-color: #10B981;
  --error-color: #EF4444;
  --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);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--light-color);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

.btn-large {
  padding: 16px 40px;
  font-size: 18px;
}

.btn-logout {
  background-color: var(--error-color);
  color: white;
  padding: 8px 16px;
  font-size: 14px;
}

.btn-logout:hover {
  background-color: #DC2626;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 32px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: var(--dark-color);
}

.error-message {
  color: var(--error-color);
  font-size: 14px;
  margin-top: 5px;
  display: none;
}

.message {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px;
  border-radius: 8px;
  margin-top: 15px;
  display: none;
}

.message-success {
  background-color: #D1FAE5;
  color: #065F46;
}

.message-error {
  background-color: #FEE2E2;
  color: #991B1B;
}