:root {
  --bg: #07090f;
  --bg-2: #0d1220;
  --panel: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.09);
  --text: #e6e9f2;
  --muted: #8f98b3;
  --accent: #7cc4ff;
  --accent-2: #b794ff;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --glow: #151b36;
  --nav-bg: rgba(7, 9, 15, 0.7);
  --lede: #c3c9dc;
  --h1-start: #ffffff;
  --star: #cfe3ff;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f6f8fd;
  --bg-2: #e9eef9;
  --panel: rgba(20, 30, 70, 0.04);
  --border: rgba(20, 30, 70, 0.14);
  --text: #141a2e;
  --muted: #55607c;
  --accent: #0b6bcb;
  --accent-2: #6b3fd4;
  --glow: #dfe8ff;
  --nav-bg: rgba(246, 248, 253, 0.8);
  --lede: #2c3555;
  --h1-start: #141a2e;
  --star: #3b5bdb;
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: radial-gradient(1200px 700px at 80% -10%, var(--glow) 0%, transparent 60%), var(--bg);
  transition: background-color 0.3s, color 0.3s;
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

#stars {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px clamp(16px, 5vw, 56px);
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.logo { font-family: var(--mono); font-weight: 700; color: var(--accent); }
.nav nav { display: flex; gap: 22px; align-items: center; }
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  line-height: 1;
  transition: border-color 0.2s, transform 0.2s;
}
.theme-toggle:hover { border-color: var(--accent); transform: rotate(15deg); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.nav nav a { color: var(--muted); font-size: 0.95rem; transition: color 0.2s; }
.nav nav a:hover { color: var(--text); }

main { max-width: 1040px; margin: 0 auto; padding: 0 clamp(16px, 5vw, 32px); }
section { padding: 84px 0 24px; }

/* Hero */
.hero { padding-top: 96px; min-height: 86vh; display: flex; flex-direction: column; justify-content: center; }
.avatar {
  border-radius: 50%;
  border: 2px solid var(--border);
  box-shadow: 0 0 0 6px rgba(124, 196, 255, 0.08), 0 0 40px rgba(183, 148, 255, 0.25);
  margin-bottom: 24px;
}
.eyebrow { font-family: var(--mono); color: var(--accent); font-size: 0.95rem; }
h1 {
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, var(--h1-start), var(--accent) 55%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin: 4px 0 10px;
}
.typed { font-family: var(--mono); font-size: clamp(1rem, 2.4vw, 1.3rem); color: var(--muted); min-height: 1.8em; }
.cursor { color: var(--accent); animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.lede { max-width: 640px; margin: 18px 0 28px; color: var(--lede); font-size: 1.1rem; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  padding: 11px 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-weight: 500;
  transition: transform 0.2s, border-color 0.2s, background 0.2s;
}
.btn:hover { transform: translateY(-2px); border-color: var(--accent); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #07090f; border: none; font-weight: 700; }

/* Section headings */
h2 { font-size: clamp(1.6rem, 4vw, 2.2rem); margin-bottom: 22px; letter-spacing: -0.01em; }
h2 span { font-family: var(--mono); color: var(--accent); font-size: 0.6em; margin-right: 10px; vertical-align: middle; }
.sub { color: var(--muted); margin: -10px 0 26px; }
.group { font-family: var(--mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--accent-2); margin: 30px 0 14px; }

/* About */
.about-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; }
.facts { list-style: none; display: grid; gap: 10px; padding: 20px; border: 1px solid var(--border); background: var(--panel); border-radius: 14px; }
.facts b { font-family: var(--mono); font-weight: 500; color: var(--accent); font-size: 0.85rem; display: block; }

/* Grids and cards */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }

.card, .tile {
  display: block;
  padding: 22px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 12px 40px rgba(124, 196, 255, 0.1); }
.card h4, .tile h4 { font-size: 1.15rem; margin-bottom: 8px; }
.card p, .tile p { color: var(--muted); font-size: 0.95rem; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.tags span, .chips span {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--accent);
  background: rgba(124, 196, 255, 0.07);
}
.tile .icon { font-size: 1.8rem; margin-bottom: 10px; }

/* Article page */
.article { max-width: 720px; margin: 0 auto; padding: 56px 0 16px; }
.article .back { font-family: var(--mono); font-size: 0.85rem; color: var(--accent); }
.article .post-meta { margin-top: 28px; }
.article h1 { font-size: clamp(2rem, 6vw, 3.2rem); margin: 6px 0 14px; }
.article h2 { font-size: 1.5rem; margin: 40px 0 12px; }
.article p, .article li { color: var(--lede); font-size: 1.06rem; }
.article p { margin: 0 0 16px; }
.article ul { margin: 0 0 18px 22px; display: grid; gap: 6px; }
.article .tags { margin: 0 0 28px; }
.article code { font-family: var(--mono); font-size: 0.88em; color: var(--accent); background: rgba(124, 196, 255, 0.08); padding: 1px 6px; border-radius: 6px; }
.article pre { margin: 0 0 18px; padding: 16px 18px; overflow-x: auto; border-radius: 12px; border: 1px solid var(--border); background: var(--panel); }
.article pre code { background: none; padding: 0; color: var(--text); font-size: 0.9rem; }
.article blockquote { margin: 0 0 18px; padding: 8px 0 8px 18px; border-left: 3px solid var(--accent-2); color: var(--text); font-size: 1.15rem; font-weight: 500; }
.article a { color: var(--accent); }
.article a:hover { text-decoration: underline; }
.article .chips.inline { margin: 0 0 18px; }
.article .chips.inline span { font-size: 0.8rem; padding: 5px 12px; }
.article .subtitle { font-size: 1.2rem; font-style: italic; color: var(--muted); margin-bottom: 18px; }
.article h3 { font-size: 1.15rem; margin: 28px 0 10px; color: var(--accent-2); }
.article hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }
.article strong { color: var(--text); }
.article ol { margin: 0 0 18px 22px; display: grid; gap: 6px; }
.table-wrap { overflow-x: auto; margin: 0 0 20px; border: 1px solid var(--border); border-radius: 12px; }
.article table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.article th, .article td { padding: 10px 14px; border-bottom: 1px solid var(--border); text-align: left; }
.article th { font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); background: var(--panel); }
.article tr:last-child td { border-bottom: none; }
.article td code { white-space: nowrap; }
.article .also { margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.95rem; }

/* Blog */
.posts { display: grid; gap: 16px; }
.post {
  display: block;
  padding: 26px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.post:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 12px 40px rgba(124, 196, 255, 0.1); }
.post-meta { display: flex; gap: 8px; font-family: var(--mono); font-size: 0.8rem; color: var(--muted); margin-bottom: 8px; }
.post h4 { font-size: 1.4rem; margin-bottom: 10px; }
.post p { color: var(--muted); max-width: 760px; margin-bottom: 14px; }
.post code { font-family: var(--mono); font-size: 0.88em; color: var(--accent); background: rgba(124, 196, 255, 0.08); padding: 1px 6px; border-radius: 6px; }
.post .read { display: inline-block; margin-top: 14px; font-family: var(--mono); font-size: 0.85rem; color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chips span { font-size: 0.9rem; padding: 8px 16px; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

footer { text-align: center; color: var(--muted); font-size: 0.85rem; padding: 64px 16px 40px; font-family: var(--mono); }

@media (max-width: 860px) {
  .grid, .grid.two, .grid.four { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid, .grid.two, .grid.four { grid-template-columns: 1fr; }
  .nav { flex-wrap: wrap; gap: 8px 12px; padding: 10px 16px; }
  .nav nav { gap: 12px; flex-wrap: wrap; }
  .nav nav a { font-size: 0.82rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .cursor { animation: none; }
}