/* Ishan Uprety — researcher site. Single stylesheet, no build step. */
:root {
  --bg: #0d1117;
  --bg-soft: #161b22;
  --bg-card: #11161d;
  --fg: #e6edf3;
  --fg-muted: #9aa7b4;
  --fg-dim: #6e7b8a;
  --accent: #4dd0a7;      /* calm teal-green: "safety rails" */
  --accent-dim: #2f806a;
  --border: #222b36;
  --max: 760px;
  --radius: 10px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fbfcfd; --bg-soft: #f2f5f8; --bg-card: #ffffff;
    --fg: #1a2029; --fg-muted: #51606f; --fg-dim: #8595a5;
    --accent: #0f7a5f; --accent-dim: #0f7a5f; --border: #e2e8ef;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 22px; }

/* Nav */
header.site {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 10;
}
header.site .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 16px; padding-bottom: 16px;
}
.brand { font-family: var(--mono); font-weight: 600; color: var(--fg); text-decoration: none; letter-spacing: -0.3px; }
.brand .dot { color: var(--accent); }
nav a { color: var(--fg-muted); text-decoration: none; margin-left: 20px; font-size: 15px; }
nav a:hover, nav a[aria-current="page"] { color: var(--accent); }

/* Hero */
.hero { padding: 72px 0 40px; }
.hero .tag {
  font-family: var(--mono); font-size: 13px; color: var(--accent);
  text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 14px;
}
.hero h1 { font-size: 2.5rem; line-height: 1.1; margin: 0 0 18px; letter-spacing: -1px; }
.hero p.lede { font-size: 1.2rem; color: var(--fg-muted); margin: 0 0 28px; }

/* Generic */
main { padding: 48px 0 80px; }
h2 { font-size: 1.5rem; margin: 48px 0 14px; letter-spacing: -0.4px; }
h3 { font-size: 1.15rem; margin: 28px 0 8px; }
a { color: var(--accent); }
p { color: var(--fg); }
.muted { color: var(--fg-muted); }
code { font-family: var(--mono); font-size: 0.88em; background: var(--bg-soft); padding: 2px 6px; border-radius: 5px; }
hr { border: none; border-top: 1px solid var(--border); margin: 40px 0; }

.btn {
  display: inline-block; font-family: var(--mono); font-size: 14px;
  padding: 10px 18px; border: 1px solid var(--accent-dim); border-radius: var(--radius);
  color: var(--accent); text-decoration: none; transition: all .15s;
}
.btn:hover { background: var(--accent); color: var(--bg); }
.btn.secondary { border-color: var(--border); color: var(--fg-muted); }
.btn.secondary:hover { background: var(--bg-soft); color: var(--fg); }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* Cards */
.cards { display: grid; gap: 16px; margin: 20px 0; }
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px;
}
.card h3 { margin-top: 0; }
.card .meta { font-family: var(--mono); font-size: 12px; color: var(--fg-dim); }

/* Pills */
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.pill {
  font-family: var(--mono); font-size: 12px; color: var(--fg-muted);
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px;
}

/* Post list */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-list li { padding: 18px 0; border-bottom: 1px solid var(--border); }
.post-list a { font-size: 1.15rem; text-decoration: none; color: var(--fg); }
.post-list a:hover { color: var(--accent); }
.post-list .date { font-family: var(--mono); font-size: 12px; color: var(--fg-dim); display: block; margin-top: 4px; }

/* Article */
article.post { font-size: 1.05rem; }
article.post h1 { font-size: 2rem; letter-spacing: -0.6px; margin-bottom: 6px; }
article.post .byline { font-family: var(--mono); font-size: 13px; color: var(--fg-dim); margin-bottom: 36px; }
article.post blockquote {
  border-left: 3px solid var(--accent-dim); margin: 24px 0; padding: 4px 20px;
  color: var(--fg-muted); background: var(--bg-soft); border-radius: 0 8px 8px 0;
}
article.post ul, article.post ol { padding-left: 24px; }
article.post li { margin: 6px 0; }

/* Footer */
footer.site { border-top: 1px solid var(--border); padding: 32px 0; color: var(--fg-dim); font-size: 14px; }
footer.site .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
footer.site a { color: var(--fg-muted); text-decoration: none; }
footer.site a:hover { color: var(--accent); }

@media (max-width: 560px) {
  .hero h1 { font-size: 2rem; }
  nav a { margin-left: 14px; }
  body { font-size: 16px; }
}

/* Roadmap status badges (reuse .card .meta; emoji-prefixed, no extra color needed) */
.card .meta { text-transform: uppercase; }