/* Critical CSS for above-the-fold content */
/* This contains the minimum CSS needed to render the initial viewport */

/* Modern CSS Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Basic typography and layout */
html {
  line-height: 1.15;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #333;
  background-color: #fff;
}

/* Markdown typography scale (scoped) */
.markdown-body {
  color: #111827;
  line-height: 1.7;
  font-size: 1rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
  font-weight: 700;
  line-height: 1.25;
  margin: 1.25em 0 0.5em;
  color: #0f172a;
}

.markdown-body h1 {
  font-size: clamp(1.75rem, 3.5vw, 2rem);
}
.markdown-body h2 {
  font-size: clamp(1.375rem, 3vw, 1.75rem);
}
.markdown-body h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
}
.markdown-body h4 {
  font-size: clamp(1rem, 2vw, 1.25rem);
}
.markdown-body h5 {
  font-size: 1rem;
}
.markdown-body h6 {
  font-size: 0.875rem;
  color: #374151;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote,
.markdown-body pre {
  margin: 0.75em 0;
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.5rem;
}

.markdown-body li + li {
  margin-top: 0.25em;
}

.markdown-body a {
  color: #2563eb;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.markdown-body img,
.markdown-body video {
  max-width: 100%;
  height: auto;
}

.markdown-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: #f3f4f6;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.95em;
}

.markdown-body pre {
  background: #0b1020;
  color: #e5e7eb;
  padding: 0.9rem 1rem;
  border-radius: 6px;
  overflow: auto;
}

.markdown-body pre code {
  background: transparent;
  padding: 0;
  font-size: 0.95em;
}

.markdown-body blockquote {
  border-left: 4px solid #e5e7eb;
  padding-left: 1rem;
  color: #4b5563;
  margin-left: 0;
  margin-right: 0;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid #e5e7eb;
  margin: 1.5rem 0;
}

/* Root layout */
#root {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Loading state */
.loading {
  opacity: 0;
}

.loaded {
  opacity: 1;
  transition: opacity 0.3s ease;
}

/* Topbar: two-row full-width header */
/* Row containers */
.topbar {
  width: 100%;
  display: block;
  margin-top: 0;
  margin-left: 0;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Shared row base */
.topbar-row {
  width: 100%;
}

/* Row 1: brand (dark) */
.topbar-row--brand {
  background-color: rgb(33, 37, 41);
  color: #fff;
  margin-left: 0;
  margin-top: 0;
  width: 100%;
}

/* Row 2: nav (light) */
.topbar-row--nav {
  background-color: rgb(248, 249, 250);
  color: #212529;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  margin-top: 0;
  margin-left: 0;
}

/* Optional centered content wrapper */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.25rem 0.5rem;
  width: 100%;
}

/* Brand/logo */
.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.brand img {
  height: 60px;
  width: auto;
  display: block;
}

/* Navigation wrapper */
.nav-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 100%;
}

/* Mobile menu toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.2rem;
  color: #212529;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

/* Menu */
.menu {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1rem 1.25rem;
}
.menu-item {
  margin: 0;
  padding: 0;
}
.menu-link {
  display: inline-block;
  text-decoration: none;
  font-weight: 500;
  color: #212529; /* default for light row */
  padding: 0.5rem 0.75rem;
  min-height: 44px; /* Ensure proper touch target size */
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.2s ease;
}
.topbar-row--nav .menu-link:hover,
.topbar-row--nav .menu-link:focus {
  color: #317efb;
  background-color: rgba(49, 126, 251, 0.1);
}

/* Active navigation item styling */
.menu-link--active {
  color: #317efb !important;
  font-weight: 600;
  border-bottom: 2px solid #317efb;
  background-color: rgba(49, 126, 251, 0.1);
}

/* Maintain white links when placed on the dark brand row, if needed */
.topbar-row--brand a {
  color: #fff;
}
.topbar-row--brand a:hover,
.topbar-row--brand a:focus {
  color: #cfe0ff;
}

/* Main content area */
main {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  padding-top: 120px; /* Account for fixed topbar height */
  width: 100%;
}

/* Hero section styling */
.hero {
  text-align: center;
  padding: 4rem 1rem;
  background-color: #f8f9fa;
}

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

.hero p {
  font-size: 1.25rem;
  color: #666;
  max-width: 800px;
  margin: 0 auto 2rem;
}

/* Button styling */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: #317efb;
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 600;
  transition: background-color 0.2s;
}

.btn:hover {
  background-color: #2563eb;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero h1 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
  }

  .hero p {
    font-size: clamp(0.9rem, 2.5vw, 1.25rem);
  }

  /* Mobile navigation */
  .nav-wrapper {
    justify-content: space-between;
  }

  .mobile-menu-toggle {
    display: block;
    order: 2;
  }

  .menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: rgb(248, 249, 250);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    gap: 0;
    z-index: 1000;
    margin: 0;
    padding: 0.5rem 0;
    order: 1;
  }

  .menu--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .menu-item {
    width: 100%;
  }

  .menu-link {
    width: 100%;
    padding: 1rem 1.5rem;
    justify-content: flex-start;
    border-radius: 0;
    border-bottom: none;
  }

  .menu-link--active {
    border-bottom: none;
    border-left: 4px solid #317efb;
  }

  /* Ensure proper container padding on mobile */
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  /* Adjust main content padding for mobile */
  main {
    padding-top: 100px; /* Reduced for mobile */
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

/* Medium screen adjustments */
@media (max-width: 992px) and (min-width: 769px) {
  .menu {
    gap: 0.75rem 1rem;
  }

  .menu-link {
    padding: 0.375rem 0.5rem;
  }

  .hero {
    padding: 3rem 1rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .hero p {
    font-size: 1.125rem;
  }
}

/* Large screen adjustments */
@media (min-width: 1200px) {
  .container {
    max-width: 1400px;
  }

  .hero {
    padding: 5rem 1rem;
  }
}

/* Ultra-wide screen adjustments */
@media (min-width: 1400px) {
  .container {
    max-width: 1600px;
  }
}

/* Small mobile screens */
@media (max-width: 480px) {
  .container {
    padding: 0.25rem 0.75rem;
  }

  .hero {
    padding: 2rem 0.75rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .topbar-row--brand .container {
    padding: 0.5rem 0.75rem;
  }

  .brand img {
    height: 32px;
  }
}

/* Print styles */
@media print {
  .topbar,
  .mobile-menu-toggle {
    display: none !important;
  }

  main {
    padding-top: 0 !important;
  }

  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}