/**
 * Main Stylesheet - GitHub Flavored Markdown Style
 * 
 * A clean, readable vanilla CSS stylesheet inspired by GitHub's markdown rendering.
 * Includes responsive layout, typography, code blocks, tables, and dark mode support.
 */

/* ============================================================================
   CSS RESET & BASE STYLES
   ============================================================================ */

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  color-scheme: light dark;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 1rem;
  line-height: 1.6;
  color: #24292f;
  background-color: #ffffff;
  word-wrap: break-word;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  body {
    color: #e6edf3;
    background-color: #0d1117;
  }
}

/* ============================================================================
   LAYOUT & CONTAINER
   ============================================================================ */

main.content {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

@media (min-width: 768px) {
  main.content {
    padding: 3rem 2rem;
  }
}

@media (min-width: 1024px) {
  main.content {
    padding: 4rem 2.5rem;
  }
}

/* Note: Sidebar margin adjustments are in toc-sidebar.css */

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  font-weight: 600;
  line-height: 1.25;
  color: inherit;
}

h1 { 
  font-size: 2em; 
  border-bottom: 1px solid #d0d7de;
  padding-bottom: 0.3em;
  margin-top: 0;
}

h2 { 
  font-size: 1.5em; 
  border-bottom: 1px solid #d0d7de;
  padding-bottom: 0.3em;
}

h3 { font-size: 1.25em; }
h4 { font-size: 1em; }
h5 { font-size: 0.875em; }
h6 { font-size: 0.85em; color: #57606a; }

@media (prefers-color-scheme: dark) {
  h1, h2 {
    border-bottom-color: #21262d;
  }
  
  h6 {
    color: #8b949e;
  }
}

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

/* ============================================================================
   LINKS
   ============================================================================ */

a {
  color: #0969da;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:visited {
  color: #8250df;
}

@media (prefers-color-scheme: dark) {
  a {
    color: #58a6ff;
  }
  
  a:visited {
    color: #bc8cff;
  }
}

/* ============================================================================
   LISTS
   ============================================================================ */

ul, ol {
  padding-left: 2em;
  margin-top: 0;
  margin-bottom: 1em;
}

ul ul, ul ol, ol ol, ol ul {
  margin-top: 0;
  margin-bottom: 0;
}

li {
  margin-bottom: 0.25em;
}

li > p {
  margin-top: 1em;
}

li + li {
  margin-top: 0.25em;
}

/* ============================================================================
   CODE BLOCKS
   ============================================================================ */

code, kbd, pre, samp {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.875em;
}

/* Inline code */
code {
  padding: 0.2em 0.4em;
  margin: 0;
  background-color: rgba(175, 184, 193, 0.2);
  border-radius: 6px;
}

@media (prefers-color-scheme: dark) {
  code {
    background-color: rgba(110, 118, 129, 0.4);
  }
}

/* Code blocks */
pre {
  padding: 1em;
  overflow: auto;
  font-size: 0.875em;
  line-height: 1.45;
  background-color: #f6f8fa;
  border-radius: 6px;
  margin-top: 0;
  margin-bottom: 1em;
}

pre code {
  display: block;
  padding: 0;
  margin: 0;
  overflow: visible;
  line-height: inherit;
  word-wrap: normal;
  background-color: transparent;
  border: 0;
}

@media (prefers-color-scheme: dark) {
  pre {
    background-color: #161b22;
  }
}

/* Syntax highlighting for org-mode htmlize output */
.org-keyword { color: #d73a49; font-weight: bold; }
.org-type { color: #005cc5; }
.org-comment, .org-comment-delimiter { color: #6a737d; font-style: italic; }
.org-string { color: #032f62; }
.org-variable-name { color: #e36209; }
.org-function-name { color: #6f42c1; font-weight: bold; }
.org-builtin { color: #005cc5; }
.org-constant { color: #005cc5; }

@media (prefers-color-scheme: dark) {
  .org-keyword { color: #ff7b72; }
  .org-type { color: #79c0ff; }
  .org-comment, .org-comment-delimiter { color: #8b949e; }
  .org-string { color: #a5d6ff; }
  .org-variable-name { color: #ffa657; }
  .org-function-name { color: #d2a8ff; }
  .org-builtin { color: #79c0ff; }
  .org-constant { color: #79c0ff; }
}

/* ============================================================================
   BLOCKQUOTES
   ============================================================================ */

blockquote {
  margin: 0 0 1em 0;
  padding: 0 1em;
  color: #57606a;
  border-left: 0.25em solid #d0d7de;
}

blockquote > :first-child {
  margin-top: 0;
}

blockquote > :last-child {
  margin-bottom: 0;
}

@media (prefers-color-scheme: dark) {
  blockquote {
    color: #8b949e;
    border-left-color: #3b434b;
  }
}

/* ============================================================================
   TABLES
   ============================================================================ */

table {
  border-spacing: 0;
  border-collapse: collapse;
  display: block;
  width: max-content;
  max-width: 100%;
  overflow: auto;
  margin-top: 0;
  margin-bottom: 1em;
}

table th {
  font-weight: 600;
}

table th,
table td {
  padding: 6px 13px;
  border: 1px solid #d0d7de;
}

table tr {
  background-color: #ffffff;
  border-top: 1px solid #d8dee4;
}

table tr:nth-child(2n) {
  background-color: #f6f8fa;
}

@media (prefers-color-scheme: dark) {
  table th,
  table td {
    border-color: #3b434b;
  }
  
  table tr {
    background-color: #0d1117;
    border-top-color: #21262d;
  }
  
  table tr:nth-child(2n) {
    background-color: #161b22;
  }
}

/* ============================================================================
   IMAGES
   ============================================================================ */

img {
  max-width: 100%;
  height: auto;
  box-sizing: content-box;
  background-color: #ffffff;
  border-radius: 6px;
}

@media (prefers-color-scheme: dark) {
  img {
    background-color: #0d1117;
  }
}

/* ============================================================================
   HORIZONTAL RULE
   ============================================================================ */

hr {
  height: 0.25em;
  padding: 0;
  margin: 1.5em 0;
  background-color: #d0d7de;
  border: 0;
}

@media (prefers-color-scheme: dark) {
  hr {
    background-color: #21262d;
  }
}

/* ============================================================================
   MISCELLANEOUS
   ============================================================================ */

/* Definition lists */
dt {
  font-weight: 600;
  margin-top: 1em;
}

dd {
  margin-left: 0;
  padding-left: 2em;
}

/* Task lists */
input[type="checkbox"] {
  margin-right: 0.5em;
}

/* Details/Summary */
details {
  margin-bottom: 1em;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

/* Keyboard keys */
kbd {
  display: inline-block;
  padding: 3px 5px;
  font-size: 0.875em;
  line-height: 1;
  color: #24292f;
  vertical-align: middle;
  background-color: #f6f8fa;
  border: solid 1px rgba(175, 184, 193, 0.4);
  border-bottom-color: rgba(175, 184, 193, 0.4);
  border-radius: 6px;
  box-shadow: inset 0 -1px 0 rgba(175, 184, 193, 0.4);
}

@media (prefers-color-scheme: dark) {
  kbd {
    color: #e6edf3;
    background-color: #161b22;
    border-color: rgba(110, 118, 129, 0.4);
    box-shadow: inset 0 -1px 0 rgba(110, 118, 129, 0.4);
  }
}

/* ============================================================================
   HEADER & FOOTER
   ============================================================================ */

header.preamble,
footer.postamble {
  padding: 1rem 1.5rem;
  color: #57606a;
  font-size: 0.875em;
}

@media (prefers-color-scheme: dark) {
  header.preamble,
  footer.postamble {
    color: #8b949e;
  }
}

/* ============================================================================
   ORG-MODE SPECIFIC ELEMENTS
   ============================================================================ */

/* Outline numbers */
.outline-2, .outline-3, .outline-4, .outline-5, .outline-6 {
  margin-top: 2em;
}

.outline-text-2, .outline-text-3, .outline-text-4 {
  margin-left: 0;
}

/* Timestamps */
.timestamp {
  color: #57606a;
  font-size: 0.875em;
}

@media (prefers-color-scheme: dark) {
  .timestamp {
    color: #8b949e;
  }
}

/* Tags */
.tag {
  display: inline-block;
  padding: 0.2em 0.6em;
  margin-left: 0.5em;
  font-size: 0.75em;
  font-weight: 500;
  line-height: 1;
  color: #0969da;
  background-color: rgba(9, 105, 218, 0.1);
  border-radius: 12px;
}

@media (prefers-color-scheme: dark) {
  .tag {
    color: #58a6ff;
    background-color: rgba(88, 166, 255, 0.1);
  }
}

/* Todo keywords */
.todo, .done {
  display: inline-block;
  padding: 0.2em 0.6em;
  margin-right: 0.5em;
  font-size: 0.875em;
  font-weight: 600;
  line-height: 1;
  border-radius: 6px;
}

.todo {
  color: #cf222e;
  background-color: rgba(207, 34, 46, 0.1);
}

.done {
  color: #1a7f37;
  background-color: rgba(26, 127, 55, 0.1);
}

@media (prefers-color-scheme: dark) {
  .todo {
    color: #ff7b72;
    background-color: rgba(255, 123, 114, 0.1);
  }
  
  .done {
    color: #7ee787;
    background-color: rgba(126, 231, 135, 0.1);
  }
}

/* ============================================================================
   RESPONSIVE ADJUSTMENTS
   ============================================================================ */

@media (max-width: 768px) {
  body {
    font-size: 0.9375rem;
  }
  
  h1 { font-size: 1.75em; }
  h2 { font-size: 1.375em; }
  h3 { font-size: 1.125em; }
  
  pre {
    padding: 0.75em;
  }
  
  table {
    font-size: 0.875em;
  }
  
  table th,
  table td {
    padding: 4px 8px;
  }
}