/* ───────── tokens ───────── */
:root {
  --bg: #0b0e14;
  --panel: #10141b;
  --panel2: #151a23;
  --border: #222a36;
  --text: #c9d1d9;
  --muted: #7d8590;
  --green: #7ee787;
  --blue: #79c0ff;
  --purple: #d2a8ff;
  --orange: #ffa657;
  --red: #ff7b72;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  margin: 0;
  color: var(--text);
  font: 400 17px/1.75 var(--sans);
  background-color: var(--bg);
  background-image:
    radial-gradient(900px 500px at 15% -10%, rgba(121, 192, 255, .10), transparent 60%),
    radial-gradient(700px 400px at 90% 0%, rgba(210, 168, 255, .08), transparent 60%),
    linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .025) 1px, transparent 1px);
  background-size: auto, auto, 32px 32px, 32px 32px;
  background-attachment: fixed;
}

::selection { background: rgba(126, 231, 135, .25); }

/* ───────── chrome ───────── */
#progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  z-index: 60;
  background: linear-gradient(90deg, var(--green), var(--blue), var(--purple));
}

.titlebar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  background: rgba(11, 14, 20, .85);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  font: 500 13px var(--mono);
  color: var(--muted);
}
.titlebar .path { color: var(--text); }

.dots { display: inline-flex; gap: 7px; }
.dots i {
  width: 11px; height: 11px;
  border-radius: 50%;
  background: #ff5f56;
}
.dots i:nth-child(2) { background: #ffbd2e; }
.dots i:nth-child(3) { background: #27c93f; }

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 48px 20px 80px;
  display: grid;
  grid-template-columns: minmax(0, 760px) 220px;
  gap: 56px;
  justify-content: center;
}

/* ───────── header block ───────── */
.prompt {
  margin: 0 0 18px;
  font: 500 14px var(--mono);
  color: var(--muted);
}
.prompt .u, .foot .u { color: var(--green); }
.prompt .t, .foot .t { color: var(--blue); }
.prompt .d, .foot .d { margin: 0 8px 0 2px; }
.prompt .cmd { color: var(--purple); }

h1.title {
  margin: 0 0 14px;
  font: 700 clamp(28px, 5vw, 42px)/1.2 var(--mono);
  letter-spacing: -.02em;
  color: #fff;
}
h1.title::before {
  content: "> ";
  color: var(--green);
}

.cursor {
  display: inline-block;
  width: .55em;
  height: 1em;
  margin-left: 8px;
  vertical-align: -.12em;
  background: var(--green);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 0 0 36px;
  padding-bottom: 22px;
  border-bottom: 1px dashed var(--border);
  font: 400 13px var(--mono);
  color: var(--muted);
}
.meta span::before { content: "# "; color: var(--green); }

/* ───────── prose ───────── */
.content > :first-child { margin-top: 0; }

.content h2,
.content h3 {
  font-family: var(--mono);
  color: #fff;
  line-height: 1.3;
  letter-spacing: -.01em;
}
.content h2 {
  margin: 2.6em 0 .7em;
  padding-bottom: .35em;
  font-size: 24px;
  font-weight: 600;
  border-bottom: 1px dashed var(--border);
}
.content h2::before { content: "## "; color: var(--green); }
.content h3 {
  margin: 2em 0 .5em;
  font-size: 19px;
  font-weight: 500;
}
.content h3::before { content: "### "; color: var(--blue); }

.content p { margin: 1em 0; }

.content a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(121, 192, 255, .35);
  transition: color .15s, border-color .15s, text-shadow .15s;
}
.content a:hover {
  color: #fff;
  border-color: var(--blue);
  text-shadow: 0 0 12px rgba(121, 192, 255, .6);
}

.content ul, .content ol { padding-left: 1.4em; }
.content li { margin: .3em 0; }
.content li::marker { color: var(--green); font-family: var(--mono); }

.content hr {
  margin: 2.5em 0;
  border: 0;
  border-top: 1px dashed var(--border);
}

.content img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.content blockquote {
  margin: 1.6em 0;
  padding: .7em 1.2em;
  color: var(--text);
  background: rgba(126, 231, 135, .05);
  border-left: 3px solid var(--green);
  border-radius: 0 10px 10px 0;
}
.content blockquote p { margin: .4em 0; }

.content table {
  display: block;
  overflow-x: auto;
  margin: 1.6em 0;
  border-collapse: collapse;
  font-size: 15px;
}
.content th, .content td {
  padding: 8px 14px;
  text-align: left;
  border: 1px solid var(--border);
}
.content th {
  background: var(--panel2);
  color: #fff;
  font: 500 13px var(--mono);
}
.content tr:nth-child(even) td { background: rgba(255, 255, 255, .02); }

/* inline code */
.content :not(pre) > code {
  padding: .12em .42em;
  font: 500 .86em var(--mono);
  color: var(--orange);
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 6px;
}

/* ───────── code blocks ───────── */
div.highlighter-rouge {
  margin: 1.7em 0;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 12px 32px -14px rgba(0, 0, 0, .8);
}

.codebar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 14px;
  background: var(--panel2);
  border-bottom: 1px solid var(--border);
  font: 500 12px var(--mono);
  color: var(--muted);
}
.codebar .dots i { width: 10px; height: 10px; }
.codebar .lang { margin-left: 4px; }
.codebar button {
  margin-left: auto;
  padding: 2px 10px;
  font: inherit;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.codebar button:hover { color: var(--green); border-color: var(--green); }

.highlight { margin: 0; }
div.highlighter-rouge pre {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  font: 400 14px/1.65 var(--mono);
  color: #e6edf3;
  background: transparent;
}
div.highlighter-rouge pre code {
  padding: 0;
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

/* syntax colours (Rouge token classes) */
.highlight .c, .highlight .cm, .highlight .c1, .highlight .cs { color: #6e7681; font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kc { color: var(--red); }
.highlight .kt { color: var(--orange); }
.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: #a5d6ff; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .mb, .highlight .il { color: var(--blue); }
.highlight .nf, .highlight .fm { color: var(--purple); }
.highlight .nc, .highlight .nn { color: var(--orange); }
.highlight .nb, .highlight .bp, .highlight .na { color: var(--blue); }
.highlight .nv, .highlight .vi, .highlight .vg, .highlight .vc { color: var(--orange); }
.highlight .nt { color: var(--green); }
.highlight .nl { color: var(--purple); }
.highlight .o, .highlight .ow { color: var(--red); }
.highlight .cp, .highlight .cpf { color: var(--red); }
.highlight .p { color: var(--text); }
.highlight .err { color: var(--red); }
.highlight .gd { color: #ffdcd7; background: rgba(248, 81, 73, .15); }
.highlight .gi { color: #aff5b4; background: rgba(63, 185, 80, .15); }

/* ───────── table of contents ───────── */
.toc {
  position: sticky;
  top: 76px;
  align-self: start;
  padding-left: 16px;
  font: 400 13px/1.5 var(--mono);
  border-left: 1px solid var(--border);
}
.toc-title { margin: 0 0 10px; color: var(--muted); }
.toc ul { margin: 0; padding: 0; list-style: none; }
.toc a {
  display: block;
  padding: 4px 0;
  color: var(--muted);
  text-decoration: none;
  transition: color .15s;
}
.toc a:hover, .toc a.active { color: var(--green); }

/* ───────── footer ───────── */
.foot {
  margin-top: 64px;
  padding-top: 20px;
  font: 400 13px/1.9 var(--mono);
  color: var(--muted);
  border-top: 1px dashed var(--border);
}
.foot a { color: var(--blue); text-decoration: none; }
.foot a:hover { text-decoration: underline; }

/* ───────── responsive + motion ───────── */
@media (max-width: 1000px) {
  .shell { grid-template-columns: minmax(0, 1fr); padding-top: 32px; }
  .toc { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .content h2 { font-size: 21px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
}