/* Modern CSS Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Import font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* Brand Colors */
  --color-og-dark: #001D29;
  --color-og-blue: #007AA3;
  --color-og-pink: #F24B69;

  /* Neutral Colors */
  --color-white: #FFFFFF;
  --color-light-grey: #EDEFF4;
  --color-medium-grey: #D5D6D7;
  --color-dark-grey: #5C5C5C;

  /* Semantic Colors */
  --color-primary: var(--color-og-blue);
  --color-secondary: var(--color-og-dark);
  --color-site-background: var(--color-white);
  --color-text: var(--color-og-dark);
  --color-text-light: rgba(0, 29, 41, 0.6);
  --color-link: var(--color-og-blue);
  --color-border: var(--color-light-grey);
  --color-code-bg: var(--color-light-grey);

  /* Layout */
  --header-height: 80px;
  --footer-height: 64px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

/* Base Typography */
html,
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.4;
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-site-background);
  -webkit-font-smoothing: subpixel-antialiased;
}

a {
  color: var(--color-link);
  font-weight: 500;
  text-decoration: none;
  background-color: transparent;
}

a:hover {
  text-decoration: underline;
}

/* Typography Scale */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 1rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1rem; }

p {
  margin: 0 0 1rem;
}

/* Lists */
ul, ol {
  margin: 0 0 1rem;
  padding: 0 1rem;
}

ol {
  list-style: decimal;
}

/* Header styling */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  padding: 0 2rem;
  height: var(--header-height);
  width: 100%;
}

@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 1.5rem;
    height: auto;
  }
}

section {
  margin-bottom: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-text);
}

@media (max-width: 768px) {
  .logo {
    width: 100%;
    justify-content: space-between;
    padding: 1rem 0;
  }
}

.logo a {
  display: flex;
  align-items: center;
  text-decoration: none;
  cursor: pointer;
}

.logo-image {
  width: 180px;
  height: auto;
  display: block;
}

.logo-subtext {
  font-size: 0.875rem;
  color: var(--color-text-light);
  font-weight: 500;
  white-space: nowrap;
}

/* Navigation styling */
.nav-primary {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

@media (max-width: 768px) {
  .nav-primary {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    width: 100%;
  }
}

.nav-primary a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  transition: all 0.2s ease;
  padding: 0.5rem 0.75rem;
  position: relative;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

@media (max-width: 768px) {
  .nav-primary a {
    width: 100%;
  }
}

.nav-primary a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.nav-primary a.active {
  background-color: var(--color-light-grey);
  color: var(--color-primary);
  text-decoration: none;
}

.nav-primary a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

.nav-primary a:hover::after{
  transform: scaleX(1);
}

/* Dropdown Navigation */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: none;
  border: none;
  color: var(--color-text);
  font-family: inherit;
  font-size: inherit;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.dropdown-toggle:hover {
  color: var(--color-primary);
  background-color: var(--color-light-grey);
}

.dropdown-toggle svg {
  transition: transform 0.2s ease;
}

.dropdown:hover .dropdown-toggle svg {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.5rem;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 29, 41, 0.1);
  min-width: 240px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  z-index: 1000;
}

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

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--color-text);
  text-decoration: none;
  transition: all 0.15s ease;
  border-radius: 0;
}

.dropdown-menu a:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.dropdown-menu a:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.dropdown-menu a:hover {
  background-color: var(--color-light-grey);
  color: var(--color-primary);
  text-decoration: none;
}

.dropdown-menu a.active {
  background-color: var(--color-light-grey);
  color: var(--color-primary);
}

/* Mobile dropdown */
@media (max-width: 768px) {
  .dropdown {
    width: 100%;
  }
  
  .dropdown-toggle {
    width: 100%;
    justify-content: space-between;
  }
  
  .dropdown-menu {
    position: static;
    margin-top: 0;
    opacity: 1;
    visibility: hidden;
    transform: none;
    max-height: 0;
    overflow: hidden;
    border: none;
    box-shadow: none;
    transition: max-height 0.3s ease, visibility 0s 0.3s;
  }
  
  .dropdown:hover .dropdown-menu {
    visibility: visible;
    max-height: 400px;
    transition: max-height 0.3s ease, visibility 0s 0s;
  }
  
  .dropdown-menu a {
    padding-left: 2rem;
  }
}

/* Main layout */
.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: calc(100vh - (var(--header-height) + var(--footer-height)));
}
@media (max-width: 768px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

/* Sidebar navigation */
.subnav {
  background: var(--color-white);
  padding: 1rem;
  height: fit-content;
  position: sticky;
  top: 0;
  align-self: start;
}
@media (max-width: 768px) {
  .subnav {
    display: none;
  }
}

.subnav a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  text-decoration: none;
  color: var(--color-text);
  transition: all 0.2s ease;
  margin-bottom: 0.25rem;
  border-radius: var(--radius-sm);
}

.subnav a:hover {
  background-color: var(--color-light-grey);
  color: var(--color-primary);
  text-decoration: none;
}

/* Main content styling */
main {
  background: var(--color-white);
  border-left: 1px solid var(--color-border);
  padding: 2rem;
}
@media (max-width: 768px) {
  main {
    padding: 1.5rem;
  }
}

main h2 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

main h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 2rem 0 1rem;
}

main p {
  margin-bottom: 1rem;
  color: var(--color-text-light);
}

main code {
  background-color: var(--color-code-bg);
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  font-family: 'Inter', monospace;
  font-size: 0.875rem;
  color: var(--color-text);
}

/* Footer styling */
footer {
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0 2rem;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-light);
  height: var(--footer-height);
}
footer p {
  margin: 0;
}
pre {
  background-color: var(--color-code-bg);
  padding: 1rem;
  border-radius: var(--radius-md);
}