:root {
    --bg: #ECF0F1;         /* secondary */
    --ink: #2C3E50;        /* primary */
    --accent: #F39C12;     /* amber */
    --highlight: #1ABC9C;  /* turquoise */
    --pop: #FF4E00;        /* nostalgia pop (sparingly) */
    --card: #FFFFFF;
    --muted: rgba(44,62,80,0.7);
    --radius: 18px;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --maxw: 78ch;
  }
  html, body { height: 100%; }
  body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    color: var(--ink);
    background: linear-gradient(180deg, #223142, #223142 200px, var(--bg) 200px);
    background-attachment: fixed;
  }
  /* Header */
  header {
    max-width: 1100px;
    margin: 0 auto;
    padding: 28px 20px 32px;
    color: #ECF0F1;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
  .dot { width: 14px; height: 14px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 0 4px rgba(243,156,18,0.25); }
  .wordmark { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; font-weight: 700; font-size: 26px; letter-spacing: 0.5px; color: #ECF0F1; }
  nav a {
    color: #ECF0F1;
    text-decoration: none;
    font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 14px;
    margin-left: 22px;
    position: relative;
  }
  nav a::after {
    content: "";
    position: absolute; left: 0; bottom: -6px;
    width: 0; height: 2px; background: var(--highlight);
    transition: width 180ms ease;
  }
  nav a:hover::after { width: 100%; }

  /* Hero Card */
  .wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px 80px; }
  .hero {
    background: #FAFBFC;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 18px auto 32px;
    padding: 28px 28px 22px;
    border: 1px solid rgba(44,62,80,0.08);
    max-width: 980px;
  }
  .hero h1 {
    font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: clamp(28px, 4.2vw, 44px);
    line-height: 1.15;
    margin: 0 0 12px;
    letter-spacing: 0.2px;
  }
  .cursor { display: inline-block; width: 10px; height: 1.1em; background: var(--highlight); margin-left: 6px; animation: blink 1.1s step-end infinite; vertical-align: text-bottom; }
  @keyframes blink { 50% { opacity: 0; } }
  .hero p { color: var(--muted); margin: 0; font-size: 16px; }

  /* Main Content */
  main { display: grid; grid-template-columns: 1fr; gap: 28px; }
  article.post {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(44,62,80,0.08);
    max-width: var(--maxw);
    margin: 0 auto;
    padding: clamp(20px, 4vw, 40px);
  }
  .meta { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
  article.post h2 { font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace; font-size: clamp(24px, 3.6vw, 36px); margin: 6px 0 16px; }
  article.post p { line-height: 1.72; font-size: 18px; margin: 16px 0; }
  article.post em { background: linear-gradient(transparent 60%, rgba(26,188,156,0.22) 0); font-style: normal; padding: 0 2px; }
  article.post a { color: var(--highlight); text-decoration: none; border-bottom: 1px dashed rgba(26,188,156,0.5); }
  article.post a:hover { border-bottom-style: solid; }
  code, pre { font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; background: #F6F8FA; border: 1px solid rgba(44,62,80,0.08); border-radius: 10px; }
  code { padding: 2px 6px; font-size: 0.92em; }
  pre { padding: 14px; overflow: auto; }

  /* Archive teaser */
  .archive {
    max-width: 1100px; margin: 10px auto 0; padding: 0 4px;
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px;
  }
  .card {
    background: var(--card); border-radius: 16px; padding: 16px 18px; border: 1px solid rgba(44,62,80,0.08); box-shadow: var(--shadow);
  }
  .card h3 { margin: 0 0 6px; font-size: 18px; font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; }
  .card p { margin: 0; color: var(--muted); font-size: 14px; }
  .readmore { display: inline-block; margin-top: 12px; text-decoration: none; font-family: "IBM Plex Mono", ui-monospace, Menlo, monospace; font-size: 14px; padding: 8px 12px; border-radius: 12px; border: 1px solid rgba(44,62,80,0.15); background: white; }
  .readmore:hover { border-color: var(--highlight); box-shadow: 0 6px 18px rgba(26,188,156,0.18); }

  /* Footer */
  footer { max-width: 1100px; margin: 36px auto 20px; padding: 0 20px; color: var(--muted); font-size: 14px; }
  footer a { color: var(--highlight); text-decoration: none; }

  /* Dark mode (optional) */
  @media (prefers-color-scheme: dark) {
    :root { --bg: #0f1720; --card: #0b1117; --muted: rgba(236,240,241,0.78); }
    body { background: linear-gradient(180deg, #0b1622, #0b1622 200px, var(--bg) 200px); color: #E8EEF2; }
    header, nav a, .wordmark { color: #E8EEF2; }
    .hero { background: #0d141b; border-color: rgba(255,255,255,0.06); }
    article.post, .card { background: #0d141b; border-color: rgba(255,255,255,0.06); }
    .readmore { background: #0d141b; }
  }