/**
 * EssentialsC Documentation - Base Styles
 * CSS Reset, Typography, and Utilities
 */

/* Modern CSS Reset - specific selectors instead of universal reset */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Remove default margins and padding from specific elements */
body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li,
figure, figcaption, blockquote,
dl, dd {
  margin: 0;
  padding: 0;
}

/* Remove list styles */
ul, ol {
  list-style: none;
}

/* Remove default button styles */
button {
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
}

/* Remove default anchor styles */
a {
  text-decoration: none;
  color: inherit;
}

/* Remove default input styles */
input, textarea, select {
  font: inherit;
  color: inherit;
}

/* Remove default table styles */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* Base Typography */
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

/* Headings */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; text-transform: uppercase; letter-spacing: 0.05em; }

/* Paragraphs */
p {
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
}

/* Links */
a {
  color: var(--accent);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Selection */
::selection {
  background-color: var(--accent);
  color: white;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}

/* Code Blocks */
code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-tertiary);
  padding: 0.125em 0.375em;
  border-radius: var(--radius-sm);
  color: var(--accent);
}

pre {
  font-family: var(--font-mono);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-5);
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.5;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Utility Classes */

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

/* Text gradient */
.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Monospace text */
.mono {
  font-family: var(--font-mono);
}

/* Flex utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

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

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-4 {
  gap: var(--space-4);
}

/* Grid utilities */
.grid {
  display: grid;
}

/* Container */
.container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Focus visible polyfill for older browsers */
.js-focus-visible :focus:not(.focus-visible) {
  outline: none;
}