*,
*::before,
*::after {
  box-sizing: border-box;
  transition:
    background-color var(--color-transition-duration) ease,
    color var(--color-transition-duration) ease,
    border-color var(--color-transition-duration) ease;
}

/* Custom Properties - Enhanced Color Scheme */
:root {
  /* Typography */
  --ff-primary: 'Inter', 'Source Sans Pro', system-ui, -apple-system, sans-serif;
  --ff-secondary: 'JetBrains Mono', 'Source Code Pro', 'Fira Code', monospace;
  --ff-heading: 'Poppins', 'Inter', sans-serif;

  /* Font Weights */
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-black: 900;

  /* Modern Color Palette */
  --clr-light: #f8f9fa;
  --clr-off-white: #ffffff;
  --clr-dark: #1a1a2e;
  --clr-gray: #6c757d;
  --clr-gray-light: #e9ecef;

  /* Accent Colors - Professional Blue/Teal */
  --clr-primary: #0066cc;
  --clr-primary-light: #4d94ff;
  --clr-primary-dark: #004c99;
  --clr-accent: #00b4d8;
  --clr-accent-light: #90e0ef;
  --clr-success: #06d6a0;

  /* Text Colors */
  --clr-text-primary: #1a1a2e;
  --clr-text-secondary: #495057;
  --clr-text-light: #6c757d;

  /* Color transition duration */
  --color-transition-duration: 0.5s;

  /* Font Sizes - Fluid Typography */
  --fs-h1: clamp(2.5rem, 5vw + 1rem, 4.5rem);
  --fs-h2: clamp(2rem, 4vw + 1rem, 3.5rem);
  --fs-h3: clamp(1.5rem, 2.5vw + 0.5rem, 2.25rem);
  --fs-h4: clamp(1.25rem, 2vw + 0.5rem, 1.75rem);
  --fs-body: clamp(1rem, 1vw + 0.5rem, 1.125rem);
  --fs-small: 0.875rem;
  --fs-extra-small: 0.75rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  --spacing-2xl: 8rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15), 0 3px 6px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* Reset & Base Styles */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--clr-light);
  color: var(--clr-text-primary);
  transition:
    background-color var(--color-transition-duration) ease,
    color var(--color-transition-duration) ease;
  margin: 0;
  font-family: var(--ff-primary);
  font-size: var(--fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

section {
  padding: var(--spacing-xl) var(--spacing-md);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

strong {
  font-weight: var(--fw-bold);
}

:focus {
  outline: 3px solid var(--clr-accent);
  outline-offset: 3px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Selection */
::selection {
  background: var(--clr-accent-light);
  color: var(--clr-dark);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75em 2em;
  background: var(--clr-primary);
  color: white;
  text-decoration: none;
  cursor: pointer;
  font-size: var(--fs-body);
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.btn:hover,
.btn:focus {
  background: var(--clr-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn--secondary {
  background: transparent;
  color: var(--clr-primary);
  border-color: var(--clr-primary);
}

.btn--secondary:hover {
  background: var(--clr-primary);
  color: white;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.2;
  margin: 0;
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
}

h1 {
  font-size: var(--fs-h1);
}

h2 {
  font-size: var(--fs-h2);
}

h3 {
  font-size: var(--fs-h3);
}

h4 {
  font-size: var(--fs-h4);
}

p {
  margin-top: 0;
  margin-bottom: 1em;
}

/* Header & Navigation */
.uberbar {
  background: rgba(248, 249, 250, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--clr-gray-light);
  padding: 1rem 2rem;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  font-size: 1.5rem;
  font-weight: var(--fw-bold);
  color: var(--clr-primary);
  text-decoration: none;
  font-family: var(--ff-heading);
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--clr-accent);
}

/* Mobile Navigation */
.nav {
  position: fixed;
  background: var(--clr-primary);
  color: var(--clr-light);
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--transition-base),
    visibility var(--transition-base),
    pointer-events var(--transition-base);
}

.nav__list {
  list-style: none;
  display: flex;
  height: 100%;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 0;
  gap: var(--spacing-md);
}

.nav__item {
  display: block;
}

.nav__link {
  font-weight: var(--fw-semibold);
  font-size: var(--fs-h3);
  text-decoration: none;
  position: relative;
  padding: 0.5em;
  transition: color var(--transition-base);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--clr-accent-light);
  transition: all var(--transition-base);
  transform: translateX(-50%);
}

.nav__link:hover::after {
  width: 100%;
}

.nav-toggle {
  padding: 0.5em;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: 10000;
  transition: transform var(--transition-base);
}

.nav-toggle:hover {
  transform: scale(1.1);
}

.nav-open .nav {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  background: var(--clr-primary);
}

@media (max-width: 790px) {
  .nav-open .nav {
    z-index: 9999;
    opacity: 1 !important;
    background: var(--clr-primary);
  }

  .nav__list {
    padding: 1rem;
    height: 100vh;
    box-sizing: border-box;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    display: flex;
    flex-direction: column;
    overflow: visible;
    background: var(--clr-primary);
  }

  .nav__link {
    color: #ffffff;
    display: inline-block;
    font-size: 1.25rem;
    opacity: 1 !important;
    visibility: visible !important;
  }

  .nav__link:hover,
  .nav__link:focus {
    color: #90e0ef;
  }

  .nav-open .nav__list,
  .nav-open .nav__item,
  .nav-open .nav__link {
    opacity: 1 !important;
    visibility: visible !important;
  }

  .nav__item {
    width: 100%;
    text-align: center;
    opacity: 1 !important;
    visibility: visible !important;
  }
}

.nav-open .nav-toggle {
  position: fixed;
  right: 1.5em;
  top: 1.5em;
}

/* Hamburger Animation */
.hamburger {
  display: block;
  position: relative;
}

.hamburger,
.hamburger::before,
.hamburger::after {
  background: var(--clr-primary);
  width: 2em;
  height: 3px;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
}

.hamburger::before {
  top: 8px;
}

.hamburger::after {
  bottom: 8px;
}

.nav-open .hamburger {
  transform: rotate(225deg);
  background: var(--clr-accent);
}

.nav-open .hamburger::before {
  transform: rotate(90deg) translate(8px);
  background: var(--clr-accent);
}

.nav-open .hamburger::after {
  opacity: 0;
}

/* Desktop Navigation */
@media (min-width: 791px) {
  .nav-toggle {
    display: none;
  }

  .nav {
    position: static;
    transform: none;
    background: transparent;
    color: var(--clr-text-primary);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    z-index: auto;
  }

  .nav__list {
    flex-direction: row;
    height: auto;
    gap: var(--spacing-md);
  }

  .nav__link {
    font-size: var(--fs-body);
    color: var(--clr-text-secondary);
  }

  .nav__link:hover {
    color: var(--clr-primary);
  }
}

/* Footer */
.footer {
  background: #0a0a0a;
  color: var(--clr-accent-light);
  text-align: center;
  padding: var(--spacing-xl) var(--spacing-md);
}

.footer a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.footer__link {
  font-weight: var(--fw-semibold);
  font-size: var(--fs-h4);
}

.footer__link:hover {
  color: var(--clr-accent);
  text-decoration: underline;
}

/* Main content (below fixed header) */
.main-content {
  padding-top: calc(var(--spacing-xl) + 4rem);
  min-height: 100vh;
}

/* Blog index */
.blog-section {
  padding: var(--spacing-xl) var(--spacing-md);
}

.blog-section .section__title {
  margin-bottom: var(--spacing-md);
}

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--spacing-md);
}

.post-list > li {
  margin: 0;
}

.post-list a {
  display: block;
  padding: var(--spacing-md);
  background: var(--clr-off-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--clr-gray-light);
}

.post-list a:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--clr-primary-light);
}

.post-thumb {
  width: 100%;
  max-height: 14rem;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-sm);
}

.post-meta {
  display: block;
}

.post-meta strong {
  display: block;
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  font-size: var(--fs-h4);
  color: var(--clr-text-primary);
  margin-bottom: var(--spacing-xs);
}

.post-meta time {
  font-size: var(--fs-small);
  color: var(--clr-text-secondary);
}

.post-list a:hover .post-meta strong {
  color: var(--clr-primary);
}

@media (min-width: 791px) {
  .post-list {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

/* Article / Prose (MDX content) */
.article-section {
  padding: var(--spacing-xl) var(--spacing-md);
}

.article-section article {
  max-width: 72ch;
  margin: 0 auto;
}

.article-section article > h1 {
  margin-bottom: var(--spacing-xs);
}

.article-section article > time {
  display: block;
  font-size: var(--fs-small);
  color: var(--clr-text-secondary);
  margin-bottom: var(--spacing-md);
}

.article-body h2 {
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  font-size: var(--fs-h2);
  color: var(--clr-text-primary);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.article-body h3,
.article-body h4 {
  font-family: var(--ff-heading);
  font-weight: var(--fw-bold);
  color: var(--clr-text-primary);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.article-body h3 {
  font-size: var(--fs-h3);
}

.article-body h4 {
  font-size: var(--fs-h4);
}

.article-body p {
  margin-bottom: 1em;
  font-size: var(--fs-body);
  color: var(--clr-text-primary);
}

.article-body a {
  color: var(--clr-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

.article-body a:hover {
  color: var(--clr-primary-dark);
  text-decoration: underline;
}

.article-body ul,
.article-body ol {
  margin: 1em 0;
  padding-left: 1.5em;
}

.article-body li {
  margin-bottom: var(--spacing-xs);
}

.article-body code {
  font-family: var(--ff-secondary);
  font-size: 0.9em;
  background: var(--clr-gray-light);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
}

.article-body pre {
  font-family: var(--ff-secondary);
  font-size: var(--fs-small);
  background: var(--clr-gray-light);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

.article-body pre code {
  background: none;
  padding: 0;
}

.article-body blockquote {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-md);
  border-left: 4px solid var(--clr-primary);
  background: var(--clr-gray-light);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--clr-text-secondary);
}

/* Utility Classes */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Pagefind UI overrides (search page) */
.search-page {
  --pagefind-ui-primary: var(--clr-primary);
  --pagefind-ui-text: var(--clr-text-primary);
  --pagefind-ui-background: var(--clr-off-white);
  --pagefind-ui-border: var(--clr-gray-light);
  --pagefind-ui-font: var(--ff-primary);
}

.search-page .section__title {
  margin-bottom: var(--spacing-md);
}

.search-page #search {
  margin-top: var(--spacing-md);
}

/* Print Styles */
@media print {
  .nav,
  .nav-toggle,
  .footer {
    display: none;
  }

  body {
    color: #000;
    background: #fff;
  }
}