/* =============================================================================
   VARIABLES
   ============================================================================= */
:root {
  --bg:           #0f0f0f;
  --bg-card:      #181818;
  --bg-code:      #1c1c1c;
  --bg-code-hdr:  #1f1f1f;
  --text:         #cccccc;
  --text-muted:   #888888;
  --text-heading: #ffffff;
  --accent:       #4ec9b0;
  --accent-dim:   rgba(78, 201, 176, 0.12);
  --border:       #2a2a2a;

  --font: 'JetBrains Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro',
          Menlo, Monaco, Consolas, monospace;

  --max-content:  680px;
  --max-post:     720px;
  --toc-width:    200px;
}


/* =============================================================================
   RESET
   ============================================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img, svg { display: block; max-width: 100%; }


/* =============================================================================
   BASE
   ============================================================================= */
html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  background:  var(--bg);
  color:       var(--text);
  font-family: var(--font);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover { color: var(--accent); }

/* shared max-width wrapper */
.wrapper {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 1.5rem;
}


/* =============================================================================
   HEADER
   ============================================================================= */
.site-header {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3.5rem;
}

.header-inner {
  max-width: calc(var(--max-post) + var(--toc-width) + 5rem);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

/* Stacked icon container — both images sit on top of each other */
.logo-wrap {
  position: relative;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.site-logo:hover .logo-wrap {
  transform: scale(1.18);
}

.logo-img,
.logo-img-hover {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  display: block;
  transition: opacity 0.35s ease;
}

/* default icon visible, hover icon hidden */
.logo-img       { opacity: 1; }
.logo-img-hover { opacity: 0; }

/* on hover: swap them */
.site-logo:hover .logo-img       { opacity: 0; }
.site-logo:hover .logo-img-hover { opacity: 1; }

.site-nav a {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-left: 1.75rem;
}
.site-nav a:hover,
.site-nav a.active { color: var(--text); }


/* =============================================================================
   FOOTER
   ============================================================================= */
.site-footer {
  margin-top: 6rem;
  padding: 1.5rem 0 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-inner { max-width: var(--max-content); margin: 0 auto; }
.site-footer p { font-size: 0.75rem; color: var(--text-muted); }
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--accent); }


/* =============================================================================
   HOMEPAGE
   ============================================================================= */
.home {
  padding-top: 3.5rem;
  padding-bottom: 2rem;
}

/* Hero block */
.hero {
  margin-bottom: 4.5rem;
}

.hero-name {
  font-size: 2.1rem;
  font-weight: 500;
  color: var(--text-heading);
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.hero-tagline {
  font-size: 0.97rem;
  color: #aaaaaa;
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.find-me-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-right: 0.1rem;
}

.social-link {
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  transition: color 0.15s;
}
.social-link:hover { color: var(--accent); }

.social-icon {
  width: 19px;
  height: 19px;
  display: block;
}

.social-sep {
  color: var(--border);
  font-size: 0.85rem;
  user-select: none;
  line-height: 1;
}

/* Section label */
.section-label {
  font-size: 1.45rem;
  font-weight: 500;
  color: var(--text-heading);
  letter-spacing: -0.01em;
  margin-bottom: 1.1rem;
  display: inline-block;
}
.section-label a {
  color: inherit;
}
.section-label a:hover {
  color: var(--accent);
}

/* Post list (shared between home and posts page) */
.post-list {
  list-style: none;
  margin-bottom: 1.5rem;
}

.post-item {
  display: flex;
  align-items: baseline;
  gap: 1.25rem;
  padding: 0.3rem 0;
}

.post-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.post-link {
  color: var(--text-heading);
  font-size: 0.88rem;
}
.post-link:hover { color: var(--accent); }

/* Homepage recent posts — same effect as "Writings": white → teal on hover */
.home .post-link {
  font-size: 1rem;
  color: var(--text-heading);
  transition: color 0.15s;
}
.home .post-link:hover { color: var(--accent); }

.home .post-date {
  font-size: 0.82rem;
  color: #666666;
}

.view-all {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: inline-block;
  margin-top: 0.25rem;
}
.view-all:hover { color: var(--accent); }


/* =============================================================================
   POSTS LISTING PAGE
   ============================================================================= */
.posts-page {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.page-title {
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-heading);
  margin-bottom: 3rem;
}

.year-group {
  margin-bottom: 3rem;
}

.year-label {
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

/* Full-width post list rows */
.post-list.full .post-item {
  gap: 1.5rem;
  padding: 0.45rem 0;
  flex-wrap: wrap;
  align-items: center;
  border-bottom: 1px solid transparent;
}

.post-list.full .post-link {
  color: var(--text);
  font-size: 0.88rem;
}
.post-list.full .post-link:hover { color: var(--accent); }

/* The → arrow that appears on hover */
.post-arrow {
  display: inline-block;
  margin-left: 0.3rem;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s, transform 0.15s;
  color: var(--accent);
}
.post-link:hover .post-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* Inline tag chips */
.post-tags-inline {
  display: flex;
  gap: 0.3rem;
  flex-shrink: 0;
}

.tag {
  font-size: 0.7rem;
  color: var(--text-muted);
}


/* =============================================================================
   POST LAYOUT (article + TOC sidebar)
   ============================================================================= */
.post-container {
  display: grid;
  grid-template-columns: var(--max-post) var(--toc-width);
  gap: 4rem;
  max-width: calc(var(--max-post) + var(--toc-width) + 4rem);
  margin: 0 auto;
  padding: 0 1.5rem;
  align-items: start;
}

/* === Post header === */
.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.post-title {
  font-size: 1.55rem;
  font-weight: 500;
  color: var(--text-heading);
  line-height: 1.4;
  margin-bottom: 0.8rem;
  letter-spacing: -0.02em;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

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

.post-tags { display: flex; gap: 0.35rem; }

/* === Post body typography === */
.post-content {
  font-size: 0.93rem;
  line-height: 1.85;
}

.post-content p { margin-bottom: 1.25rem; }

.post-content h2,
.post-content h3,
.post-content h4 {
  color: var(--text-heading);
  margin: 2.5rem 0 0.9rem;
  font-weight: 500;
  line-height: 1.4;
}

.post-content h2 {
  font-size: 1.1rem;
  padding-left: 0.65rem;
  border-left: 2px solid var(--accent);
}

.post-content h3 {
  font-size: 0.97rem;
  color: #dddddd;
}

.post-content h4 { font-size: 0.93rem; color: #bbbbbb; }

.post-content ul,
.post-content ol {
  margin: 0.75rem 0 1.25rem 1.4rem;
}
.post-content li { margin-bottom: 0.35rem; }

/* Inline code */
.post-content code {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  font-size: 0.875em;
  font-family: var(--font);
}

/* === Code blocks === */
/* Rouge wraps: <div class="language-X highlighter-rouge"><div class="highlight"><pre>... */
.highlighter-rouge {
  margin: 1.5rem 0;
  border-radius: 7px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);   /* accent top stripe — shows it's a code block */
  background: var(--bg-code);
}

/* Strip inline-code styling inside code blocks */
.highlighter-rouge code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

/* Code header injected by copy-code.js — dots · lang · copy */
.code-header {
  display: flex;
  align-items: center;
  padding: 0.45rem 0.9rem;
  background: var(--bg-code-hdr);
  border-bottom: 1px solid var(--border);
  gap: 0.75rem;
}

/* macOS-style window dots */
.code-dots {
  display: flex;
  gap: 5px;
  align-items: center;
  flex-shrink: 0;
}
.code-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #333;
  transition: background 0.15s;
}
.highlighter-rouge:hover .code-dot:nth-child(1) { background: #ff5f57; }
.highlighter-rouge:hover .code-dot:nth-child(2) { background: #febc2e; }
.highlighter-rouge:hover .code-dot:nth-child(3) { background: #28c840; }

/* Language label centred in the bar */
.code-lang {
  flex: 1;
  text-align: center;
  font-size: 0.7rem;
  color: var(--accent);
  text-transform: lowercase;
  letter-spacing: 0.06em;
  opacity: 0.75;
}

/* Copy button */
.copy-btn {
  background: transparent;
  border: 1px solid #333;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.68rem;
  padding: 0.18rem 0.6rem;
  border-radius: 3px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.copy-btn:hover  { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* The <pre> itself */
.highlight {
  background: var(--bg-code) !important;
  overflow-x: auto;
}
.highlight pre {
  margin: 0;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  white-space: pre;     /* never wrap */
  font-size: 0.83rem;
  line-height: 1.65;
  color: #f8f8f2;
}

/* === Blockquotes === */
.post-content blockquote {
  margin: 1.5rem 0;
  padding: 0.65rem 1.25rem;
  border-left: 3px solid var(--accent);
  font-style: italic;
  color: var(--text-muted);
}
.post-content blockquote p { margin: 0; }

/* === Tables === */
.post-content table {
  display: block;
  overflow-x: auto;
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.85rem;
}
.post-content th {
  text-align: left;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 500;
  white-space: nowrap;
}
.post-content td {
  padding: 0.5rem 0.85rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.post-content tr:last-child td { border-bottom: none; }
.post-content tr:hover td { background: rgba(255,255,255,0.02); }

/* === Post footer === */
.post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.back-link {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.back-link:hover { color: var(--accent); }


/* =============================================================================
   TABLE OF CONTENTS (sidebar)
   ============================================================================= */
.toc-sidebar {
  position: sticky;
  top: 2rem;
  align-self: start;
}

.toc {
  padding: 0.9rem 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
}

.toc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.7rem;
}

.toc-header {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin: 0;
}

.toc-toggle,
.toc-subtoggle {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  border-radius: 3px;
  cursor: pointer;
  font-family: var(--font);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.toc-toggle {
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.14rem 0.4rem;
}

.toc-toggle:hover,
.toc-subtoggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.toc-list {
  list-style: none;
}

.toc-list li {
  margin-bottom: 0.35rem;
  line-height: 1.4;
}

.toc-list a {
  font-size: 0.77rem;
  color: var(--text-muted);
  display: block;
}

.toc-list a:hover,
.toc-list a.active { color: var(--accent); }

.toc-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.toc-subtoggle {
  width: 1rem;
  height: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.72rem;
  line-height: 1;
  padding: 0;
}

.toc-sublist {
  list-style: none;
}

.toc-h3 { padding-left: 0.75rem; }
.toc-h3 a { font-size: 0.73rem; }

.toc-h1 a { font-size: 0.8rem; font-weight: 500; }


/* =============================================================================
   PAGE (about, etc.)
   ============================================================================= */
.page-content {
  padding-top: 2rem;
  padding-bottom: 2rem;
}
.page-content .page-title {
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-heading);
  margin-bottom: 2rem;
}
.page-content p {
  margin-bottom: 1.25rem;
  line-height: 1.85;
  font-size: 0.93rem;
}
.page-content h2 {
  font-size: 1rem;
  color: var(--text-heading);
  margin: 2rem 0 0.75rem;
  padding-left: 0.65rem;
  border-left: 2px solid var(--accent);
}
.page-content a { color: var(--accent); }
.page-content a:hover { opacity: 0.8; }


/* =============================================================================
   404 PAGE
   ============================================================================= */
.not-found {
  padding-top: 6rem;
  text-align: center;
}
.not-found-code {
  font-size: 5rem;
  font-weight: 500;
  color: var(--text-heading);
  letter-spacing: -0.04em;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.not-found-msg {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}


/* =============================================================================
   IMAGES — hover zoom (like s1r1us.ninja)
   ============================================================================= */
.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  display: block;
  margin: 1.75rem auto;
  border: 1px solid var(--border);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.35s ease;
  position: relative;
  z-index: 1;
}
.post-content img:hover {
  transform: scale(1.045);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.75);
  z-index: 10;
}

/* Caption: italicised paragraph immediately after an image */
.post-content img + em,
.post-content p > img ~ em {
  display: block;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: -1rem;
  margin-bottom: 1.5rem;
}


/* =============================================================================
   TAGS PAGE  (/tags)
   ============================================================================= */
.tags-page {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

/* Tag cloud at the top */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.tag-cloud-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.tag-cloud-item:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.tag-count {
  font-size: 0.68rem;
  color: var(--text-muted);
  opacity: 0.7;
}

/* Per-tag group */
.tag-group {
  margin-bottom: 2.5rem;
  scroll-margin-top: 2rem;  /* so anchor links clear the header */
}

.tag-group-heading {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* Make [tag] chips in posts/listings clickable */
a.tag {
  transition: color 0.15s;
}
a.tag:hover { color: var(--accent); }


/* =============================================================================
   ROUGE SYNTAX — MONOKAI THEME
   ============================================================================= */
.highlight .c,  .highlight .cm, .highlight .cp,
.highlight .c1, .highlight .cs { color: #75715e; font-style: italic; } /* Comment */
.highlight .err { color: #f92672; }
.highlight .k,  .highlight .kc, .highlight .kd,
.highlight .kr  { color: #66d9ef; }          /* Keyword */
.highlight .kn  { color: #f92672; }          /* Keyword.Namespace (import) */
.highlight .kp  { color: #66d9ef; }
.highlight .kt  { color: #66d9ef; }          /* Type */
.highlight .n               { color: #f8f8f2; }
.highlight .na              { color: #a6e22e; } /* Attr */
.highlight .nb              { color: #f8f8f2; }
.highlight .nc              { color: #a6e22e; } /* Class name */
.highlight .nd              { color: #a6e22e; } /* Decorator */
.highlight .ne              { color: #a6e22e; } /* Exception */
.highlight .nf              { color: #a6e22e; } /* Function */
.highlight .nn              { color: #f8f8f2; }
.highlight .nt              { color: #f92672; } /* Tag (HTML) */
.highlight .nv              { color: #f8f8f2; }
.highlight .o, .highlight .ow { color: #f92672; } /* Operator */
.highlight .p               { color: #f8f8f2; }
.highlight .s,  .highlight .s1, .highlight .s2,
.highlight .sb, .highlight .sc, .highlight .sd,
.highlight .sh, .highlight .si, .highlight .sx,
.highlight .sr, .highlight .ss { color: #e6db74; } /* String */
.highlight .se              { color: #ae81ff; }    /* String.Escape */
.highlight .m,  .highlight .mf, .highlight .mh,
.highlight .mi, .highlight .mo, .highlight .il { color: #ae81ff; } /* Number */
.highlight .l,  .highlight .ld { color: #ae81ff; }
.highlight .gd              { color: #f92672; }   /* diff removed */
.highlight .gi              { color: #a6e22e; }   /* diff added */
.highlight .gu              { color: #75715e; }
.highlight .ge              { font-style: italic; }
.highlight .gs              { font-weight: bold; }


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

/* Collapse TOC sidebar on anything narrower than post+toc */
@media (max-width: 980px) {
  .post-container {
    grid-template-columns: 1fr;
    max-width: var(--max-post);
    gap: 0;
  }
  .toc-sidebar { display: none; }
}

@media (max-width: 640px) {
  html { font-size: 15px; }

  .site-header { margin-bottom: 2.5rem; }

  .hero-name { font-size: 1.6rem; }
  .home { padding-top: 2rem; }

  .post-title { font-size: 1.25rem; }

  /* Stack date + title vertically on tiny screens */
  .post-list.full .post-item {
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid var(--border);
  }
}