/* ============================================
   Solomon's Blog — dark theme
   ============================================ */
:root {
  --bg-color: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #161b22;
  --text-color: #dfe4ea;
  --text-muted: #8b949e;
  --accent-color: #f0f3f6;
  --link-color: #60a5fa;
  --link-hover: #93c5fd;
  --border-color: #262c36;
  --code-bg: #11151c;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
               'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Charter', 'Iowan Old Style', 'Palatino Linotype',
                Georgia, serif;
  --font-mono: ui-monospace, 'SF Mono', 'Fira Code', Monaco,
               'Cascadia Code', 'Courier New', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ============================================
   Header
   ============================================ */
.site-header {
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-color);
  letter-spacing: -0.02em;
}

.site-title:hover {
  color: var(--link-color);
}

.nav-links {
  display: flex;
  gap: 1.75rem;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.25rem 0;
}

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

/* ============================================
   Layout
   ============================================ */
.main-content {
  max-width: 900px;
  margin: 0 auto;
  padding: 3.5rem 2rem 4rem;
  flex: 1;
  width: 100%;
  animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  color: var(--accent-color);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  scroll-margin-top: 5rem; /* anchors don't hide under sticky header */
}

h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 3rem;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2rem;
}

p {
  margin-bottom: 1.4rem;
}

/* ============================================
   Post page
   ============================================ */
.post {
  max-width: 720px;
  margin: 0 auto;
}

.post-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.post-title {
  margin-bottom: 1rem;
  font-size: 2.4rem;
}

.post-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 0.15rem 0.75rem;
}

.post-content {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  line-height: 1.8;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: var(--font-sans);
}

.post-content a {
  text-decoration: underline;
  text-decoration-color: rgba(96, 165, 250, 0.4);
  text-underline-offset: 3px;
}

.post-content a:hover {
  text-decoration-color: var(--link-hover);
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 2rem 0;
  border: 1px solid var(--border-color);
}

.post-content strong {
  color: var(--accent-color);
}

/* prev / next navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  max-width: 48%;
}

.post-nav-item.next {
  text-align: right;
  margin-left: auto;
}

.post-nav-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.post-nav-title {
  font-size: 0.95rem;
  font-weight: 600;
}

/* ============================================
   Post list (home + blog index)
   ============================================ */
.post-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin: 1.5rem 0 0;
}

.post-list li {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.75rem 2rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.post-list li:hover {
  border-color: var(--link-color);
  transform: translateY(-2px);
}

.post-list h2 {
  font-size: 1.35rem;
  margin: 0 0 0.4rem;
}

.post-list h2 a {
  color: var(--accent-color);
}

.post-list h2 a:hover {
  color: var(--link-color);
}

.post-list .post-meta {
  margin-bottom: 0.6rem;
  font-size: 0.85rem;
}

.post-excerpt {
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* ============================================
   Code
   ============================================ */
code {
  font-family: var(--font-mono);
  background-color: var(--bg-secondary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  border: 1px solid var(--border-color);
}

pre {
  background-color: var(--code-bg);
  padding: 1.25rem 1.5rem;
  border-radius: 10px;
  overflow-x: auto;
  margin: 1.75rem 0;
  border: 1px solid var(--border-color);
  line-height: 1.6;
}

pre code {
  padding: 0;
  background: none;
  border: none;
  font-size: 0.85rem;
}

/* language label on fenced blocks */
div[class*="language-"] {
  position: relative;
}

div[class*="language-"]::before {
  position: absolute;
  top: 0.5rem;
  right: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  pointer-events: none;
}

div.language-go::before   { content: "go"; }
div.language-bash::before { content: "sh"; }
div.language-sh::before   { content: "sh"; }
div.language-json::before { content: "json"; }
div.language-yaml::before { content: "yaml"; }
div.language-sql::before  { content: "sql"; }
div.language-js::before,
div.language-javascript::before { content: "js"; }
div.language-python::before { content: "py"; }
div.language-c::before    { content: "c"; }
div.language-cpp::before  { content: "c++"; }
div.language-rust::before { content: "rust"; }

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

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

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

/* ============================================
   Syntax highlighting (Rouge)
   ============================================ */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs,
.highlight .cd { color: #7f848e; font-style: italic; }           /* comments */
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp,
.highlight .kr, .highlight .kv { color: #c678dd; }               /* keywords */
.highlight .kt { color: #e5c07b; }                               /* types */
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb,
.highlight .sc, .highlight .sd, .highlight .se, .highlight .sh,
.highlight .si, .highlight .sx, .highlight .sr,
.highlight .ss { color: #98c379; }                               /* strings */
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh,
.highlight .mo, .highlight .mb, .highlight .mx,
.highlight .il { color: #d19a66; }                               /* numbers */
.highlight .nf, .highlight .fm { color: #61afef; }               /* functions */
.highlight .nc, .highlight .nn { color: #e5c07b; }               /* classes/namespaces */
.highlight .nb, .highlight .bp { color: #56b6c2; }               /* builtins */
.highlight .nt { color: #e06c75; }                               /* tags */
.highlight .na { color: #d19a66; }                               /* attributes */
.highlight .nv, .highlight .vc, .highlight .vg,
.highlight .vi { color: #e06c75; }                               /* variables */
.highlight .o, .highlight .ow { color: #c678dd; }                /* operators */
.highlight .p, .highlight .pi { color: #abb2bf; }                /* punctuation */
.highlight .gp { color: #7f848e; user-select: none; }            /* shell prompt */
.highlight .go { color: #8b949e; }                               /* shell output */
.highlight .gd { color: #e06c75; background: rgba(224,108,117,.1); } /* diff del */
.highlight .gi { color: #98c379; background: rgba(152,195,121,.1); } /* diff add */
.highlight .gh, .highlight .gu { color: #61afef; font-weight: 600; }
.highlight .err { color: inherit; background: none; }            /* no red boxes */
.highlight .w { color: inherit; }

/* ============================================
   Tables
   ============================================ */
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.85rem;
  font-family: var(--font-sans);
  display: block;
  overflow-x: auto;                 /* wide tables scroll, page doesn't */
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.post-content th,
.post-content td {
  padding: 0.6rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.post-content th {
  background: var(--bg-secondary);
  color: var(--accent-color);
  font-weight: 600;
  border-bottom: 2px solid var(--border-color);
}

.post-content tr:last-child td {
  border-bottom: none;
}

.post-content tbody tr:hover {
  background: var(--bg-secondary);
}

.post-content td:not(:first-child) {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ============================================
   Misc content
   ============================================ */
blockquote {
  border-left: 3px solid var(--link-color);
  padding: 0.75rem 1.5rem;
  margin: 2rem 0;
  background: var(--bg-secondary);
  border-radius: 0 8px 8px 0;
  color: var(--text-muted);
}

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

ul, ol {
  margin: 1rem 0 1.5rem 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

hr {
  border: none;
  height: 1px;
  background: var(--border-color);
  margin: 3rem 0;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 0.75rem;
}

.site-footer a {
  color: var(--text-muted);
  font-weight: 500;
}

.site-footer a:hover {
  color: var(--link-color);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  h1 { font-size: 1.85rem; }
  h2 { font-size: 1.4rem; }
  .post-title { font-size: 1.85rem; }

  .main-content {
    padding: 2.5rem 1.25rem;
  }

  .nav-container {
    padding: 0 1.25rem;
  }

  .post-list li {
    padding: 1.5rem;
  }

  .post-content {
    font-size: 1.05rem;
  }
}

@media (max-width: 480px) {
  .nav-container {
    flex-direction: column;
    gap: 0.75rem;
  }

  .nav-links {
    gap: 1.25rem;
  }

  h1 { font-size: 1.6rem; }

  .post-list li {
    padding: 1.25rem;
    border-radius: 8px;
  }

  .post-nav {
    flex-direction: column;
  }

  .post-nav-item,
  .post-nav-item.next {
    max-width: 100%;
    text-align: left;
    margin-left: 0;
  }
}

/* ============================================
   Accessibility
   ============================================ */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--link-color);
  outline-offset: 2px;
}