:root {
  --fg: #14161a;
  --bg: #ffffff;
  --muted: #5b6472;
  --accent: #1a56db;
  --border: #e3e6ea;
  --max: 42rem;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e9edf2;
    --bg: #14161a;
    --muted: #9aa5b4;
    --accent: #7aa7ff;
    --border: #2a2f37;
  }
}
* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}
header.site, footer.site, main { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
header.site { padding-top: 2rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; }
main { padding-top: 2rem; padding-bottom: 3rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 0.5rem; }
h2 { font-size: 1.4rem; margin: 2rem 0 0.75rem; }
h3 { font-size: 1.15rem; margin: 1.5rem 0 0.5rem; }
a { color: var(--accent); }
p, li { max-width: 68ch; }
.meta { color: var(--muted); font-size: 0.85rem; }
ul.posts { list-style: none; padding: 0; }
ul.posts li { padding: 1rem 0; border-bottom: 1px solid var(--border); }
ul.posts a { font-size: 1.1rem; font-weight: 600; text-decoration: none; }
ul.posts p { margin: 0.25rem 0 0; color: var(--muted); font-size: 0.95rem; }
code { background: var(--border); padding: 0.1em 0.35em; border-radius: 4px; font-size: 0.9em; }
footer.site { padding: 2rem 1.25rem 3rem; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; }
img, table, iframe { max-width: 100%; }

/* --- komponen artikel --- */
.answer-box {
  border-left: 4px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 6px 6px 0;
}
.answer-box p { margin: 0; }
.callout {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1.75rem 0;
  background: color-mix(in srgb, var(--fg) 4%, transparent);
}
.callout p { margin: 0 0 0.75rem; }
.callout p:last-child { margin-bottom: 0; }
.compare-table { overflow-x: auto; margin: 1.5rem 0; }
.compare-table table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.compare-table th, .compare-table td {
  border: 1px solid var(--border);
  padding: 0.6rem 0.8rem;
  text-align: left;
  vertical-align: top;
}
.compare-table th { background: color-mix(in srgb, var(--fg) 8%, transparent); font-weight: 700; }
.sources { font-size: 0.9rem; color: var(--muted); }
.sources li { margin-bottom: 0.35rem; }
article h2 { scroll-margin-top: 1rem; }

/* --- layout + sticky TOC (kaidah Vlad: sticky left sidebar) --- */
.layout { max-width: 100%; }
.layout.has-toc {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: 2.5rem;
  align-items: start;
}
.layout.has-toc article { max-width: 46rem; }
nav.toc {
  position: sticky;
  top: 1.5rem;
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  font-size: 0.85rem;
  border-left: 2px solid var(--border);
  padding-left: 0.9rem;
}
nav.toc .toc-title {
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 0.6rem;
}
nav.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
nav.toc li { margin-bottom: 0.45rem; counter-increment: toc; }
nav.toc li a {
  color: var(--muted);
  text-decoration: none;
  display: block;
  line-height: 1.35;
}
nav.toc li a::before { content: counter(toc) ". "; opacity: 0.6; }
nav.toc li a:hover { color: var(--accent); }
@media (max-width: 60rem) {
  .layout.has-toc { grid-template-columns: 1fr; gap: 1.5rem; }
  nav.toc {
    position: static;
    max-height: none;
    border-left: none;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
  }
  nav.toc ol { columns: 2; column-gap: 1.5rem; }
}