/* ===========================================
   Font Imports
   =========================================== */
@import url("https://fonts.googleapis.com/css2?family=PT+Serif:ital,wght@0,400;0,700;1,400;1,700&display=swap");
@import url("https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;600&display=swap");

/* ===========================================
   CSS Custom Properties — Light Mode (Default)
   Pale ivory with deep earthy browns
   =========================================== */
:root {
  /* Font stacks */
  --font-serif: "PT Serif", Georgia, serif;
  --font-mono: "Fira Code", Consolas, monospace;

  /* Backgrounds */
  --color-bg: #f5f1eb;
  --color-bg-panel: #ebe6de;

  /* Text */
  --color-text: #3d3428;
  --color-text-heading: #2a2318;
  --color-text-muted: #6b5d4d;
  --color-text-italic: #52473a;

  /* Accent — Deep Ochre */
  --color-accent: #b5642a;
  --color-accent-hover: #9a5423;

  /* Code */
  --color-code-bg: #e8e2d8;
  --color-code-text: #3d3428;

  /* Borders */
  --color-border: #d4cdc1;
  --color-border-light: #e0dbd2;

  /* Sizing */
  --content-width: 72ch;
  --spacing-base: 1rem;

  /* Font rendering */
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

/* ===========================================
   Dark Mode
   Applied via html.dark class (set by JS based on 
   saved preference or system preference)
   =========================================== */
html.dark {
  --color-bg: #1a1816;
  --color-bg-panel: #242120;
  --color-text: #e8e4dc;
  --color-text-heading: #f5f1eb;
  --color-text-muted: #a8a097;
  --color-text-italic: #c4beb4;
  --color-accent: #d4793a;
  --color-accent-hover: #e8945a;
  --color-code-bg: #2a2725;
  --color-code-text: #e0dbd2;
  --color-border: #3d3835;
  --color-border-light: #322e2b;
}

/* ===========================================
   Transition Timing
   =========================================== */
:root {
  --transition-duration: 0.25s;
  --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  width: 100%;
  scroll-behavior: smooth;
}

::selection {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

/* ===========================================
   Body & Layout
   =========================================== */
body {
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  width: 100%;
  display: flex;
  flex-direction: column;
  transition: 
    background-color var(--transition-duration) var(--transition-easing),
    color var(--transition-duration) var(--transition-easing);
}

main {
  flex-grow: 1;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: calc(var(--spacing-base) * 2) var(--spacing-base);
  width: 100%;
}

/* ===========================================
   Typography — Headings
   =========================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-heading);
  transition: color var(--transition-duration) var(--transition-easing);
}

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: 0.9rem; }

/* First heading shouldn't have top margin */
h1:first-child,
h2:first-child,
h3:first-child {
  margin-top: 0;
}

/* ===========================================
   Typography — Body
   =========================================== */
p {
  margin-bottom: 1.25rem;
}

strong {
  font-weight: 700;
}

em {
  font-style: italic;
  color: var(--color-text-italic);
  transition: color var(--transition-duration) var(--transition-easing);
}

/* ===========================================
   Links
   =========================================== */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-duration) var(--transition-easing);
}

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

/* ===========================================
   Lists
   =========================================== */
/* Base list styles (for nav, footer, etc.) */
ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li {
  margin-bottom: 0.4rem;
}

li > ul,
li > ol {
  margin-top: 0.4rem;
  margin-bottom: 0;
}

/* ===========================================
   Content Lists — Grid-Aligned Custom Markers
   =========================================== */

/* Bullet width = indent width for perfect vertical grid alignment */
:root {
  --list-indent: 1.25em;
}

.content ul,
.content ol {
  padding-left: 0;
  margin-left: 0;
  list-style: none;
}

.content li {
  padding-left: var(--list-indent);
  position: relative;
}

.content ul>li::before {
  content: "•";
  position: absolute;
  left: 0;
  width: var(--list-indent);
  text-align: left;
  color: var(--color-text-muted);
}

.content ol {
  counter-reset: list-counter;
}

.content ol>li {
  counter-increment: list-counter;
}

.content ol>li::before {
  content: counter(list-counter) ".";
  position: absolute;
  left: 0;
  width: var(--list-indent);
  text-align: left;
  color: var(--color-text-muted);
  font-size: 0.9em;
}

/* Progressive de-emphasis for nested lists (~5% per level, compounding) */
.content ul ul,
.content ul ol,
.content ol ul,
.content ol ol {
  opacity: 0.95;
}
/* ===========================================
   Blockquotes
   =========================================== */
blockquote {
  padding-left: 1.5rem;
  border-left: 2px solid var(--color-accent);
  margin: 1.5rem 0;
  color: var(--color-text-muted);
  font-style: italic;
  transition: 
    border-color var(--transition-duration) var(--transition-easing),
    color var(--transition-duration) var(--transition-easing);
}

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

/* ===========================================
   Code
   =========================================== */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  transition: 
    background-color var(--transition-duration) var(--transition-easing),
    color var(--transition-duration) var(--transition-easing);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
  background-color: var(--color-code-bg);
  color: var(--color-code-text);
  padding: 1rem 1.25rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 1.5rem 0;
  transition: 
    background-color var(--transition-duration) var(--transition-easing),
    color var(--transition-duration) var(--transition-easing);
}

pre code {
  display: block;
  padding: 0;
  background: none;
  border-radius: 0;
}

/* ===========================================
   Horizontal Rules
   =========================================== */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
  transition: border-color var(--transition-duration) var(--transition-easing);
}

/* ===========================================
   Tables
   =========================================== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

th, td {
  padding: 0.6rem 0.8rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 700;
  color: var(--color-text-heading);
}

/* ===========================================
   Images
   =========================================== */
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem 0;
}

/* ===========================================
   Header & Navigation
   =========================================== */
.site-header {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: calc(var(--spacing-base) * 2) var(--spacing-base);
  padding-bottom: 0;
  width: 100%;
}

.site-header nav {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--spacing-base);
  padding-bottom: calc(var(--spacing-base) * 1.5);
  border-bottom: 1px solid var(--color-border-light);
  transition: border-color var(--transition-duration) var(--transition-easing);
}

.nav-home {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  letter-spacing: -0.01em;
  transition: color var(--transition-duration) var(--transition-easing);
}

.nav-home:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: calc(var(--spacing-base) * 1.25);
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: lowercase;
  letter-spacing: 0.02em;
}

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

/* ===========================================
   Theme Toggle
   =========================================== */
.theme-toggle {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  color: var(--color-text-muted);
  transition: color var(--transition-duration) var(--transition-easing);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-accent);
}

.theme-toggle:focus {
  outline: none;
}

.theme-toggle:focus-visible {
  outline: 1px solid var(--color-accent);
  outline-offset: 2px;
}

/* Show appropriate icon based on theme */
.theme-toggle-dark {
  display: none;
}

html.dark .theme-toggle-light {
  display: none;
}

html.dark .theme-toggle-dark {
  display: inline;
}

/* ===========================================
   Post & Page Headers
   =========================================== */
.post-header,
.page-header {
  margin-bottom: calc(var(--spacing-base) * 2);
}

.post-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-base);
}
.post-header h1,
.page-header h1 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.post-header time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

/* ===========================================
   Copy As Markdown Button
   =========================================== */
.copy-markdown-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.35rem;
  padding: 0.65em 1.1em;
  min-width: 7.5em;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  cursor: pointer;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  transition:
    color var(--transition-duration) var(--transition-easing),
    border-color var(--transition-duration) var(--transition-easing),
    background-color var(--transition-duration) var(--transition-easing),
    transform 0.1s var(--transition-easing);
}

.copy-markdown-btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-bg-panel);
}

.copy-markdown-btn:active {
  transform: scale(0.97);
}

.copy-markdown-btn:focus {
  outline: none;
}

.copy-markdown-btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Button states - default and copied */
.copy-markdown-btn .btn-state {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  transition:
    opacity 0.25s var(--transition-easing),
    transform 0.25s var(--transition-easing);
}

.copy-markdown-btn .btn-state svg {
  flex-shrink: 0;
}

/* Default state */
.copy-markdown-btn .btn-state-default {
  opacity: 1;
  transform: translateY(0);
}

/* Copied state - hidden by default */
.copy-markdown-btn .btn-state-copied {
  position: absolute;
  opacity: 0;
  transform: translateY(8px);
}

/* When copied class is active */
.copy-markdown-btn.copied {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-bg-panel);
}

.copy-markdown-btn.copied .btn-state-default {
  opacity: 0;
  transform: translateY(-8px);
}

.copy-markdown-btn.copied .btn-state-copied {
  opacity: 1;
  transform: translateY(0);
}
.post-footer {
  margin-top: calc(var(--spacing-base) * 3);
  padding-top: var(--spacing-base);
  border-top: 1px solid var(--color-border-light);
  transition: border-color var(--transition-duration) var(--transition-easing);
}

.post-footer a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

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

/* ===========================================
   Posts List
   =========================================== */
.posts-list h2 {
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: calc(var(--spacing-base) * 3);
  margin-bottom: var(--spacing-base);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
}

.posts-list ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.posts-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--spacing-base);
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border-light);
  transition: border-color var(--transition-duration) var(--transition-easing);
}

.posts-list li:last-child {
  border-bottom: none;
}

.posts-list time {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.posts-list a {
  color: var(--color-text);
}

.posts-list a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.posts-list.archive li {
  flex-direction: row;
}

.posts-list.archive time {
  min-width: 7rem;
}

.more-link {
  margin-top: var(--spacing-base);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ===========================================
   Content Area
   =========================================== */
.content > *:first-child {
  margin-top: 0;
}

/* ===========================================
   Footer
   =========================================== */
.site-footer {
}

/* ===========================================
   Scrollbar
   =========================================== */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) var(--color-bg);
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ===========================================
   Responsive
   =========================================== */
@media (max-width: 600px) {
  body {
    font-size: 16px;
  }

  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }

  .posts-list li {
    flex-direction: column;
    gap: 0.2rem;
  }

  .posts-list.archive li {
    flex-direction: column;
  }

  .posts-list.archive time {
    min-width: auto;
  }

  .site-header nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}

/* ===========================================
   Print Styles
   =========================================== */
@media print {
  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  a {
    color: black;
    text-decoration: underline;
  }

  pre, code {
    background: #f5f5f5;
  }

  .site-header,
  .site-footer,
  .post-footer {
    display: none;
  }
}