:root {
  --brand-purple: #6c5ce7;
  --dark-panel: #1e2530;
}

html, body {
  height: 100%;
}

body {
  background-color: #f4f5f9;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

body > main {
  flex: 1 0 auto;
}

body > footer {
  flex-shrink: 0;
}

.navbar-brand-tutoriales {
  font-weight: 600;
}

.nav-link.active-tutoriales {
  color: var(--brand-purple) !important;
  font-weight: 600;
}

.card-sistema, .card-tutorial {
  border-radius: 0.75rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.15s ease;
}

.card-sistema:hover, .card-tutorial:hover {
  transform: translateY(-2px);
}

.btn-primary-tutoriales {
  background-color: var(--brand-purple);
  border-color: var(--brand-purple);
  border-radius: 2rem;
  color: #fff;
}

.btn-primary-tutoriales:hover {
  background-color: #5b4bd6;
  border-color: #5b4bd6;
  color: #fff;
}

.dark-panel {
  background-color: var(--dark-panel);
  color: #e8e8f0;
  border-radius: 0.75rem;
  padding: 2rem;
}

.dark-panel a {
  color: #a29bfe;
}

.red-social-card {
  border-radius: 0.75rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.red-social-card i {
  font-size: 2rem;
  color: var(--brand-purple);
}