/* ============================================
   HFKB Notes — design tokens
   ============================================ */
:root {
  --bg:        #10151a;
  --bg-alt:    #171d24;
  --bg-raised: #1c232b;
  --border:    #262e38;
  --text:      #e8e6e1;
  --text-muted:#8b94a3;
  --amber:     #d9a441;
  --amber-dim: #a97e35;
  --teal:      #3e9c93;

  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  --font-body: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;

  --measure: 68ch;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  background-attachment: fixed;
  background-position: -1px -1px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--teal); text-decoration: none; }
a:hover { color: var(--amber); }
a:focus-visible,
button:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

h1, h2, h3 {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0 0 0.5em;
}

code, pre, kbd {
  font-family: var(--font-mono);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 4px;
}
code { padding: 0.1em 0.4em; font-size: 0.9em; color: var(--amber); }
pre { padding: 1em 1.2em; overflow-x: auto; }
pre code { border: none; padding: 0; color: var(--text); }

/* ---------- layout shell ---------- */
.wrap { max-width: 880px; margin: 0 auto; padding: 0 24px; }

header.site {
  border-bottom: 1px solid var(--border);
  background: rgba(16, 21, 26, 0.85);
  backdrop-filter: blur(6px);
  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(--font-mono);
  font-weight: 600;
  color: var(--text);
  font-size: 1.05rem;
}
.brand .dot { color: var(--amber); }
nav.primary { display: flex; gap: 24px; font-family: var(--font-mono); font-size: 0.92rem; }
nav.primary a { color: var(--text-muted); }
nav.primary a:hover, nav.primary a[aria-current="page"] { color: var(--amber); }

/* ---------- eyebrow / prompt label — the signature element ---------- */
.prompt {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.prompt::before { content: "hfkb@notes:~$"; color: var(--text-muted); }
.prompt .cursor {
  display: inline-block;
  width: 8px; height: 1em;
  background: var(--amber);
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- hero ---------- */
.hero { padding: 96px 0 64px; }
.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  line-height: 1.25;
  max-width: 16ch;
}
.hero h1 .accent { color: var(--amber); }
.hero p.lede {
  max-width: var(--measure);
  color: var(--text-muted);
  font-size: 1.08rem;
}

/* ---------- section spacing ---------- */
section.block { padding: 48px 0; border-top: 1px solid var(--border); }

/* ---------- article cards ---------- */
.entries { display: flex; flex-direction: column; gap: 0; }
.entry {
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
}
.entry .meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 2px;
}
.entry h3 { margin-bottom: 6px; font-size: 1.15rem; }
.entry h3 a { color: var(--text); }
.entry h3 a:hover { color: var(--amber); }
.entry p { margin: 0 0 8px; color: var(--text-muted); max-width: var(--measure); }
.tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--teal);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 7px;
}

@media (max-width: 560px) {
  .entry { grid-template-columns: 1fr; gap: 6px; }
}

/* ---------- article page ---------- */
article.post { padding: 56px 0 80px; }
article.post .post-title {
  font-size: clamp(1.7rem, 3.6vw, 2.3rem);
  max-width: 22ch;
}
article.post .byline {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}
article.post .content { max-width: var(--measure); }
article.post .content p { margin: 0 0 1.2em; }
article.post .content h2 { margin-top: 1.8em; font-size: 1.3rem; }
article.post .content h3 { margin-top: 1.4em; font-size: 1.05rem; color: var(--amber); }
article.post .content ul, article.post .content ol { max-width: var(--measure); padding-left: 1.3em; }
article.post .content li { margin-bottom: 0.5em; }
article.post .content blockquote {
  margin: 1.5em 0;
  padding: 0.2em 1.2em;
  border-left: 3px solid var(--teal);
  color: var(--text-muted);
}

.back-link { font-family: var(--font-mono); font-size: 0.85rem; }

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  margin-top: 40px;
}
footer.site .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
footer.site .prompt::before { content: "hfkb@notes:~$ exit"; }
footer.site .foot-links { display: flex; gap: 18px; font-family: var(--font-mono); font-size: 0.85rem; }
footer.site .foot-links a { color: var(--text-muted); }