:root {
  /* --- Colors --- */
  --bg-color: #fdfdfd;
  --text-main: #111;
  --text-muted: #828282;
  --text-table: #3f3f3f;

  /* --- Links --- */
  --link-color: #4169e1;
  --link-hover: #333333;
  --link-nav: #666;

  /* --- Borders & Backgrounds --- */
  --border-light: #e8e8e8;
  --border-table: #dedede;
  --border-table-bottom: #c9c9c9;
  --bg-table-alt: #f7f7f7;
  --bg-table-header: #f0f0f0;
  --bg-highlight: #f8f8f8;
  --bg-code-inline: rgba(152, 152, 152, 0.1);

  /* --- Typography --- */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
  --font-serif: Palatino, 'Palatino Linotype', Georgia, Times, 'Times New Roman', serif;

  /* --- Font Sizes --- */
  --fs-base: 16px;
  --fs-content: 18px;
  --fs-small: 14px;
  --fs-code: 15px;
  --fs-post-link: 24px;

  /* --- Spacing --- */
  --spacing-xl: 32px;
  --spacing-lg: 30px;
  --spacing-md: 20px;
  --spacing-sm: 16px;
  --spacing-xs: 12px;
  --max-width-page: 800px;
  --container-padding: 0 20px;

  /* --- Syntax Highlighting --- */
  --hl-comment: #999988;
  --hl-error: #a61717;
  --hl-error-bg: #e3d2d2;
  --hl-keyword: #000000;
  --hl-type: #445588;
  --hl-string: #d14;
  --hl-regex: #009926;
  --hl-symbol: #990073;
  --hl-number: #009999;
  --hl-attr: #008080;
  --hl-builtin: #0086B3;
  --hl-func: #990000;
  --hl-tag: #000080;
  --hl-diff-del: #ffdddd;
  --hl-diff-ins: #ddffdd;
}

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

body {
  font: 400 var(--fs-base)/1.5 var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-color);
  -webkit-text-size-adjust: 100%;
  font-kerning: normal;
  min-height: 100vh;
  max-width: var(--max-width-page);
  margin: 0 auto;
  padding: var(--container-padding);
}

hr {
  border: none;
  border-top: 1px solid var(--border-light);
  margin-bottom: var(--spacing-xl);
}

img {
  max-width: 100%;
  vertical-align: middle;
  border: 0;
}

/* 2. Typography & Links */

h1, h2, h3, h4, h5, h6, p, blockquote, pre, ul, ol, dl, figure, .highlight {
  margin-bottom: var(--spacing-xl);
  text-wrap: balance;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

ul, ol {
  margin-left: var(--spacing-lg);
}

li > p {
  margin-bottom: var(--spacing-sm);
}

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

blockquote {
  color: var(--text-muted);
  border-left: 4px solid var(--border-light);
  padding-left: 15px;
  letter-spacing: -1px;
  font-style: italic;
}

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

figcaption {
  font-size: var(--fs-small);
  color: var(--text-muted);
}

/* 3. Layout Components (Top Nav, Page Structure) */

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: var(--spacing-xl) 0;
}

.top .heading,
.top nav {
  flex: 1;
}

.top nav {
  text-align: right;
}

.top nav ul {
  list-style: none;
  margin: 0;
}

.top nav ul li {
  display: inline-block;
  margin-left: var(--spacing-sm);
}

.top a {
  color: var(--link-nav);
}

.top a:hover,
.top nav a.active {
  color: var(--text-main);
  text-decoration: underline;
}

.page-content {
  padding: var(--spacing-lg) 0;
  flex: 1;
}

.view { display: none; }
.view.active { display: block; }

/* 4. Content & Articles */

.content {
  font: var(--fs-content)/28px var(--font-serif);
  margin-bottom: var(--spacing-lg);
  text-rendering: optimizeLegibility;
}

.content .title {
  margin-bottom: 4px;
}

.content .date {
  color: var(--link-nav);
  font-size: var(--fs-base);
  margin-bottom: var(--spacing-xl);
}

.content h2 { font-size: 1.3em; }
.content h3 { font-size: 1.1em; }
.content h4 { font-size: 1em; font-weight: bold; }

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

.post-list > li {
  margin-bottom: var(--spacing-lg);
}

.post-meta {
  font-size: var(--fs-small);
  color: var(--text-muted);
}

.post-link {
  display: block;
  font-size: var(--fs-post-link);
}

/* 5. Tables (Unified & Responsive) */

table, 
article table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-lg);
  text-align: left;
  color: var(--text-table);
  border: 1px solid var(--border-light);
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table th, table td,
article th, article td {
  padding: 10px 15px;
  border: 1px solid var(--border-light);
  min-width: 120px;
}

table th,
article thead {
  background-color: var(--bg-table-header);
  border: 1px solid var(--border-table);
  border-bottom: 1px solid var(--border-table-bottom);
}

table tr:nth-child(even),
article tr:nth-child(even) {
  background-color: var(--bg-table-alt);
}

/* Reset for code highlight tables */
.highlight table {
  display: table;
  overflow-x: visible;
  margin-bottom: 0;
  border: 0;
}

.highlight table td {
  min-width: auto;
  padding: 5px;
  border: 0;
}

/* 6. Code & Syntax Highlighting */

pre, code {
  font-size: var(--fs-code);
  font-family: var(--font-mono);
  border: 1px solid var(--border-light);
}

code {
  padding: 1px 5px;
  background-color: var(--bg-code-inline);
}

pre {
  padding: 8px 12px;
  overflow-x: auto;
  background-color: var(--bg-highlight);
}

pre > code {
  border: 0;
  padding: 0;
  background-color: transparent;
}

.highlight { background-color: var(--bg-highlight); }
.highlight .c, .highlight .c1, .highlight .cm, .highlight .ch, .highlight .cd { color: var(--hl-comment); font-style: italic; }
.highlight .cp { color: #999; font-weight: bold; }
.highlight .err { color: var(--hl-error); background-color: var(--hl-error-bg); }
.highlight .k, .highlight .kv, .highlight .kc, .highlight .kd, .highlight .kn,
.highlight .kp, .highlight .kr { color: var(--hl-keyword); font-weight: bold; }
.highlight .kt { color: var(--hl-type); font-weight: bold; }
.highlight .s, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .s1,
.highlight .s2, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx,
.highlight .dl { color: var(--hl-string); }
.highlight .sr { color: var(--hl-regex); }
.highlight .ss { color: var(--hl-symbol); }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo,
.highlight .mb, .highlight .mx, .highlight .il { color: var(--hl-number); }
.highlight .na { color: var(--hl-attr); }
.highlight .nb { color: var(--hl-builtin); }
.highlight .nc { color: var(--hl-type); font-weight: bold; }
.highlight .no { color: var(--hl-attr); }
.highlight .ne, .highlight .nf, .highlight .fm, .highlight .nl { color: var(--hl-func); font-weight: bold; }
.highlight .nt { color: var(--hl-tag); }
.highlight .ow, .highlight .o { color: var(--hl-keyword); font-weight: bold; }

/* 7. Media Queries */

@media screen and (max-width: 600px) {
  .top {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
    margin: var(--spacing-md) 0;
  }

  .top nav {
    text-align: left;
  }

  .top nav ul li:first-child {
    margin-left: 0;
  }

  .content {
    font-size: var(--fs-base);
    line-height: 26px;
  }

  .content h2 { font-size: 20px; }
  .content h3 { font-size: 18px; }
  .post-link { font-size: 20px; }
  
  pre, code {
    font-size: 13px;
  }
}