/* Critical CSS for above-the-fold content */
:root {
  --bs-primary: #007bff;
  --bs-primary-rgb: 0, 123, 255;
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #212529;
  background-color: #fff;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  overflow-x: hidden;
}

/* Navbar critical styles */
.navbar {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.navbar-brand {
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  font-size: 1.25rem;
  text-decoration: none;
  white-space: nowrap;
}

.navbar .company-name {
  font-weight: 500;
  color: var(--bs-primary);
  line-height: 1.2;
}

.navbar .sub-title {
  font-size: 0.7rem;
  font-weight: 400;
  color: #555;
}

/* Hero section critical styles */
.hero-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
  background-color: #f8f9fa;
  padding: 4rem 0;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.25rem;
  font-weight: 300;
  color: #6c757d;
  margin-bottom: 1.5rem;
}

.btn-primary {
  color: #fff;
  background-color: var(--bs-primary);
  border-color: var(--bs-primary);
  padding: 0.5rem 1rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 0.25rem;
  text-decoration: none;
  display: inline-block;
  font-weight: 500;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 1px solid transparent;
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn-primary:hover {
  background-color: #0069d9;
  border-color: #0062cc;
}

/* Container, row, and columns for basic layout */
.container {
  width: 100%;
  padding-right: 0.75rem;
  padding-left: 0.75rem;
  margin-right: auto;
  margin-left: auto;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-top: calc(-1 * 0.5rem);
  margin-right: calc(-0.5 * 0.5rem);
  margin-left: calc(-0.5 * 0.5rem);
}

.col {
  flex: 1 0 0%;
  padding-right: 0.5rem;
  padding-left: 0.5rem;
}

.text-center {
  text-align: center !important;
}

/* Focus visible for accessibility */
:focus-visible {
  outline: 3px solid var(--bs-primary);
  outline-offset: 2px;
}

/* Skip link for keyboard accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  z-index: 1050;
  padding: 8px;
  background-color: #000;
  color: #fff;
  text-decoration: none;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }

  .text-lg-start {
    text-align: left !important;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }
}

/* Loading state for better perceived performance */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

/* High contrast mode support */
@media (forced-colors: active) {
  .btn-primary {
    border: 2px solid;
  }
}