/* ==========================================================================
   Clean Dark Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,400;0,700;1,400&family=Noto+Serif:ital,wght@0,400;0,700;1,400&display=swap');

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */

:root {
  /* Colors — warm, neutral dark palette */
  --color-bg: #21201e;
  --color-bg-code: #2a2926;
  --color-text: #e0ddd8;
  --color-text-secondary: #b0aca5;
  --color-text-muted: #807b74;
  --color-accent: #8ab4d6;
  --color-accent-hover: #a8cce8;
  --color-accent-visited: #b8a0ca;
  --color-border: #3a3835;

  /* Typography */
  --font-body: 'Noto Serif', Georgia, Cambria, serif;
  --font-heading: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', Consolas, 'Courier New', monospace;

  /* Layout */
  --radius: 4px;
}

/* ==========================================================================
   Base Elements
   ========================================================================== */

html {
  scrollbar-gutter: stable;
}

body {
  font-family: var(--font-body);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  font-size: 18px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  color: var(--color-text);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: 1.2em;
  line-height: 1.8;
}

.post-content {
  line-height: 1.8;
}

.post-content p {
  margin-bottom: 1.4em;
}

/* ==========================================================================
   Links
   ========================================================================== */

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: rgba(123, 160, 196, 0.35);
  text-underline-offset: 2px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

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

a:visited {
  color: var(--color-accent);
  text-decoration-color: rgba(123, 160, 196, 0.35);
}

/* Remove animated underline pseudo-elements */
.post-content a:not(.no-underline):after,
.post-list a:after {
  display: none;
}

/* ==========================================================================
   Layout Components
   ========================================================================== */

.wrapper {
  max-width: 48rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ==========================================================================
   Site Header & Navigation
   ========================================================================== */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 1rem 0;
  position: relative;
}

.site-header::after {
  display: none;
}

.site-header .wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-title {
  color: var(--color-text) !important;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-avatar {
  border-radius: 50%;
  display: block;
}

.site-title:visited {
  color: var(--color-text) !important;
}

.site-nav .page-link {
  color: var(--color-text-secondary);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.15s ease;
  padding: 0.25rem 0.5rem;
  margin-left: 0.25rem;
}

.site-nav .page-link:hover {
  color: var(--color-text);
  background: none;
  transform: none;
}

.site-nav .page-link.current {
  color: var(--color-text);
  font-weight: 700;
  background: none;
  border: none;
  box-shadow: none;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  margin-top: 3rem;
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  font-size: 0.85rem;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--color-text-muted) !important;
  text-decoration: none;
}

.footer-link:hover {
  color: var(--color-accent) !important;
}

.footer-link:visited {
  color: var(--color-text-muted) !important;
}

.footer-sep {
  color: var(--color-border);
}

.footer-copy {
  color: var(--color-text-muted);
}

/* ==========================================================================
   Post Content & Typography
   ========================================================================== */

.post-meta {
  color: var(--color-text-muted);
  font-family: var(--font-heading);
  font-weight: 400;
  font-size: 0.85rem;
  letter-spacing: 0;
  text-transform: none;
}

.post-title a,
.post-list .post-link {
  color: var(--color-text);
  text-decoration: none;
}

.post-list .post-link:visited,
.post-link:visited {
  color: var(--color-text) !important;
}

.post-title a:hover {
  color: var(--color-accent);
  background: none;
  background-clip: unset;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: var(--color-accent);
  animation: none;
}

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

.post-list > li {
  border-bottom: none;
  padding: 0.75rem 0;
  margin-bottom: 0;
}

.post-list h3 {
  margin-top: 0.2em;
  margin-bottom: 0;
}

em, strong {
  color: var(--color-text);
}

/* Post header on single pages */
.post-header {
  padding-bottom: 1rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
  border-image: none;
}

.post-header .post-title {
  margin-top: 0;
  color: var(--color-text);
  background: none;
  background-clip: unset;
  -webkit-background-clip: unset;
  -webkit-text-fill-color: var(--color-text);
}

/* Post tags */
.post-tag {
  display: inline-block;
  background-color: var(--color-bg-code);
  color: var(--color-text-secondary);
  padding: 0.15em 0.6em;
  border-radius: 1em;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: lowercase;
  letter-spacing: normal;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.page-content {
  padding-top: 1.5rem;
  animation: fadeIn 0.3s ease-out;
}

/* ==========================================================================
   Blockquotes
   ========================================================================== */

blockquote {
  border-left: 3px solid var(--color-border);
  margin: 1rem 0;
  padding: 0.5rem 1rem;
  background-color: transparent;
  color: var(--color-text-secondary);
}

/* ==========================================================================
   Tables
   ========================================================================== */

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.75rem;
  text-align: left;
}

th {
  background-color: var(--color-bg-code);
  font-family: var(--font-heading);
  font-weight: 700;
}

tr:nth-child(even) {
  background-color: rgba(255, 255, 255, 0.02);
}

/* ==========================================================================
   Code Blocks & Syntax Highlighting
   ========================================================================== */

code {
  background-color: var(--color-bg-code);
  color: var(--color-text);
  padding: 0.15em 0.4em;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 0.88em;
  border: none;
}

pre {
  background-color: var(--color-bg-code);
  border: none;
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
}

pre code {
  background-color: transparent;
  padding: 0;
  border: none;
  font-size: 0.85em;
}

.highlight {
  background-color: var(--color-bg-code) !important;
  color: var(--color-text);
  border-radius: var(--radius);
  padding: 1rem;
  border: none !important;
}

.highlight pre,
.highlight code {
  background-color: transparent !important;
  border: none !important;
  padding: 0 !important;
  margin: 0 !important;
  color: var(--color-text);
}

.highlight * {
  color: var(--color-text) !important;
}

.highlight .c {
  color: var(--color-text-muted) !important;
  font-style: italic;
}

/* ==========================================================================
   Special Content Boxes (Notes, etc.)
   ========================================================================== */

div[style*="background-color:#f9f9f9"],
div[style*="background-color: #f9f9f9"],
div[style*="border:1px solid #ccc"],
div[style*="border: 1px solid #ccc"] {
  background-color: var(--color-bg-code) !important;
  border: 1px solid var(--color-border) !important;
  color: var(--color-text) !important;
}

/* ==========================================================================
   Utility Overrides
   ========================================================================== */

pre, code, .highlight pre, .highlight code {
  border: none !important;
}

.post-content em, .post-content strong {
  color: inherit;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

/* RSS link — simple inline style */
.rss-subscribe a {
  display: inline-block;
  color: var(--color-text-muted) !important;
  background: none;
  padding: 0;
  border-radius: 0;
  font-family: var(--font-heading);
  font-weight: 400;
  text-transform: none;
  letter-spacing: normal;
  font-size: 0.9rem;
  box-shadow: none;
  text-decoration: underline;
  text-decoration-color: rgba(112, 112, 112, 0.4);
  text-underline-offset: 2px;
  transition: color 0.15s ease;
}

.rss-subscribe a:hover {
  color: var(--color-accent) !important;
  background: none;
  transform: none;
  box-shadow: none;
  text-decoration-color: var(--color-accent);
}

.rss-subscribe a:visited {
  color: var(--color-text-muted) !important;
}

/* Scrollbar styling for code blocks */
.highlight::-webkit-scrollbar,
pre::-webkit-scrollbar {
  height: 6px;
  width: 6px;
}

.highlight::-webkit-scrollbar-track,
pre::-webkit-scrollbar-track {
  background: transparent;
}

.highlight::-webkit-scrollbar-thumb,
pre::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

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

.highlight,
pre {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}

/* ==========================================================================
   Homepage Hero
   ========================================================================== */

.hero {
  padding: 0 0 1.5rem;
  margin-bottom: 0;
}

.post-list-heading {
  margin-top: 0.5em;
}

.hero-tagline {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 38rem;
  margin: 0;
}

/* ==========================================================================
   Page Fade-in
   ========================================================================== */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */

.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-text);
  color: var(--color-bg);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: bold;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 0.7;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  opacity: 1;
  transform: translateY(-2px);
}

.back-to-top:before {
  content: "\2191";
}

/* ==========================================================================
   Mobile Hamburger Menu
   ========================================================================== */

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
}

@media (max-width: 600px) {
  body {
    font-size: 17px;
  }

  .site-header .wrapper {
    flex-wrap: wrap;
  }

  .site-header .site-title {
    font-size: 1.1rem;
  }

  h1 {
    font-size: 1.6rem;
  }

  .nav-toggle-label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    order: 1;
  }

  .nav-toggle-label span,
  .nav-toggle-label span::before,
  .nav-toggle-label span::after {
    display: block;
    width: 1.25rem;
    height: 2px;
    background-color: var(--color-text-secondary);
    border-radius: 1px;
    position: relative;
    transition: all 0.3s ease;
  }

  .nav-toggle-label span::before,
  .nav-toggle-label span::after {
    content: '';
    position: absolute;
    left: 0;
  }

  .nav-toggle-label span::before {
    top: -6px;
  }

  .nav-toggle-label span::after {
    top: 6px;
  }

  .nav-toggle:checked ~ .nav-toggle-label span {
    background-color: transparent;
  }

  .nav-toggle:checked ~ .nav-toggle-label span::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav-toggle:checked ~ .nav-toggle-label span::after {
    top: 0;
    transform: rotate(-45deg);
  }

  .site-nav {
    display: none;
    width: 100%;
    order: 2;
    padding: 0.5rem 0;
  }

  .nav-toggle:checked ~ .site-nav {
    display: flex;
    flex-direction: column;
  }

  .site-nav .page-link {
    margin-left: 0;
    padding: 0.5rem;
  }
}