/* public/css/styles.css */
:root {
  --sidebar-width: 280px;
  --header-height: 56px;
  --primary-color: #0d6efd;
  --secondary-color: #6c757d;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Sidebar Styles */
.sidebar {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  padding: var(--header-height) 0 0;
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
  width: var(--sidebar-width);
}

.sidebar-heading {
  font-size: .75rem;
  letter-spacing: .1em;
}

.sidebar .nav-link {
  font-weight: 500;
  color: #333;
  padding: .5rem 1rem;
  border-radius: .25rem;
  margin: .125rem .5rem;
  transition: all .2s ease;
}

.sidebar .nav-link:hover {
  background-color: rgba(0, 0, 0, .05);
}

.sidebar .nav-link.active {
  color: var(--primary-color);
  background-color: rgba(13, 110, 253, .1);
}

.sidebar .nav-link i,
.sidebar .nav-link .nav-icon {
  width: 20px;
  text-align: center;
}

/* Main Content */
main {
  margin-left: var(--sidebar-width);
  padding-top: calc(var(--header-height) + 1rem);
}

/* App Cards */
.app-card {
  transition: transform .2s ease, box-shadow .2s ease;
  cursor: pointer;
}

.app-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 .5rem 1rem rgba(0, 0, 0, .15);
}

.app-card .card-title {
  font-size: 1rem;
}

.app-card .card-text {
  font-size: .875rem;
  min-height: 2.5rem;
}

/* Header */
.navbar-brand {
  padding-top: .75rem;
  padding-bottom: .75rem;
  background-color: rgba(0, 0, 0, .25);
  box-shadow: inset -1px 0 0 rgba(0, 0, 0, .25);
}

/* Footer */
.footer {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-width);
  right: 0;
}

/* Responsive */
@media (max-width: 767.98px) {
  .sidebar {
    width: 100%;
  }
  
  main {
    margin-left: 0;
  }
  
  .footer {
    left: 0;
  }
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2rem;
  height: 2rem;
  margin: -1rem 0 0 -1rem;
  border: 3px solid #f3f3f3;
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Status Indicators */
.status-healthy {
  color: #198754;
}

.status-unhealthy {
  color: #dc3545;
}

.status-unknown {
  color: #6c757d;
}