* { box-sizing: border-box; }
html { color: var(--ink); background: var(--bg); font-family: var(--font-body); }
body { min-width: 0; margin: 0; }
a { color: inherit; text-decoration: none; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
  padding: 0.55rem 0.8rem;
  color: var(--surface);
  background: var(--accent);
  transform: translateY(-120%);
}
.skip-link:focus { transform: translateY(0); }

/* External link indicator — established site convention (home.css), reused
   here so every external link gets it automatically via target="_blank". */
a[target="_blank"]:not(.skip-link):not(.btn):not(:has(img)):not(:has(picture)):not(:has(svg))::after {
  content: " ↗";
  font-size: 0.8em;
  opacity: 0.7;
}

/* Plain prose links (inside paragraphs) still read as links; block-level
   card/row links stay ink-colored via their own rules below. */
.content p a { color: var(--accent); text-decoration: underline; text-decoration-color: var(--border); }
.content p a:hover { color: var(--accent-dark); text-decoration-color: currentColor; }

.site-shell { display: flex; align-items: stretch; min-height: 100vh; }

.sidebar {
  flex: 0 0 17rem;
  display: flex;
  flex-direction: column;
  padding: 2rem 1.5rem;
  border-right: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  overflow-y: auto;
}

.profile-link { display: flex; align-items: center; gap: 0.85rem; margin-bottom: 2.25rem; }
.profile-link:hover .name { color: var(--accent); }
.profile-link img { width: 3rem; height: 3rem; border-radius: 50%; display: block; filter: grayscale(1); border: 1px solid var(--border); }
.profile-link .name { font: 700 0.95rem/1.25 var(--font-display); letter-spacing: -0.01em; color: var(--ink); }
.profile-link .role { margin-top: 0.15rem; font-size: 0.75rem; color: var(--muted); }

.nav-group { margin-bottom: 1.75rem; }
.nav-group .label { display: block; margin-bottom: 0.6rem; font: 500 0.68rem/1.4 var(--font-display); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.nav-group ul { list-style: none; margin: 0; padding: 0; }
.nav-group li + li { margin-top: 0.15rem; }
.nav-group a {
  display: block;
  padding: 0.4rem 0 0.4rem 0.75rem;
  border-left: 2px solid transparent;
  font: 500 0.86rem/1.4 var(--font-display);
  color: var(--body-text, var(--ink));
}
.nav-group a:hover { border-left-color: var(--border); color: var(--ink); }
.nav-group a[aria-current="page"] { border-left-color: var(--accent); color: var(--ink); font-weight: 700; }

.sidebar-social { margin-top: auto; padding-top: 1.5rem; display: flex; gap: 1.1rem; }
.sidebar-social a { display: block; color: var(--muted); }
.sidebar-social a:hover { color: var(--ink); }
.sidebar-social svg { width: 1.3rem; height: 1.3rem; display: block; }

.main { flex: 1 1 auto; min-width: 0; padding: clamp(2.25rem, 5vw, 4.5rem) clamp(1.5rem, 5vw, 5rem); }
.content { max-width: 46rem; }
.content--wide { max-width: 58rem; }

.back-link { display: inline-block; margin-bottom: 1.5rem; font: 500 0.82rem/1.4 var(--font-display); color: var(--accent); text-decoration: none; }
.back-link:hover { text-decoration: underline; }

.eyebrow { font: 500 0.75rem/1.4 var(--font-display); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-text); }
h1 { margin: 0.5rem 0 0.75rem; font: 700 clamp(1.8rem, 4vw, 2.6rem)/1.1 var(--font-display); letter-spacing: -0.03em; }
.lead { margin: 0 0 2.5rem; max-width: 62ch; font-size: 1rem; line-height: 1.6; color: var(--body-text, var(--ink)); }

/* Row list: articles, talks, incident-management hub */
.row-list { border-top: 1px solid var(--border); }
.row { display: block; padding: 1.5rem 0; border-bottom: 1px solid var(--border); }
.row .meta { margin-bottom: 0.4rem; font: 500 0.72rem/1.4 var(--font-display); letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.row h2 { margin: 0 0 0.5rem; font: 700 1.2rem/1.35 var(--font-display); letter-spacing: -0.015em; }
.row p { margin: 0; max-width: 60ch; font-size: 0.94rem; line-height: 1.6; color: var(--body-text, var(--ink)); }
.row:hover h2 { color: var(--accent); }
.row .num { display: inline-block; min-width: 1.6rem; margin-right: 0.5rem; font: 500 0.78rem/1.4 var(--font-display); color: var(--muted); }

/* Pricing / service cards */
.card-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--border); margin-bottom: 2.5rem; }
.card-row .card { padding: 1.5rem; border-left: 1px solid var(--border); }
.card-row .card:first-child { border-left: none; }
.card .tag { display: block; margin-bottom: 0.75rem; font: 500 0.68rem/1.4 var(--font-display); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.card h3 { margin: 0 0 0.4rem; font: 700 1.05rem/1.3 var(--font-display); letter-spacing: -0.01em; }
.card .price { margin: 0 0 1rem; font: 700 1rem/1.3 var(--font-display); }
.card .price span { font-weight: 400; font-size: 0.78rem; color: var(--muted); }
.card > p.desc { margin: 0 0 1rem; font-size: 0.88rem; line-height: 1.55; color: var(--body-text, var(--ink)); font-weight: 600; }
.card ul { margin: 0 0 1rem; padding-left: 1.1rem; font-size: 0.85rem; line-height: 1.55; }
.card ul li + li { margin-top: 0.3rem; }
.card .note { margin: 0 0 1.1rem; font-size: 0.78rem; line-height: 1.5; color: var(--muted); }
.card .cta { font: 500 0.82rem/1.4 var(--font-display); color: var(--accent); }

/* Simple link list: contacts */
.link-list { list-style: none; margin: 0 0 2rem; padding: 0; border-top: 1px solid var(--border); }
.link-list li { display: flex; align-items: center; gap: 0.75rem; padding: 0.9rem 0; border-bottom: 1px solid var(--border); font: 500 0.95rem/1.4 var(--font-display); }
.link-list a { color: var(--accent); }
.link-list a:hover { color: var(--accent-dark); }
.link-list .muted { color: var(--muted); font-weight: 400; font-size: 0.85rem; }
.link-list svg { flex: 0 0 1.15rem; width: 1.15rem; height: 1.15rem; fill: none; stroke: var(--muted); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

/* Tool groups: opensource */
.tool-group { margin-bottom: 2.5rem; }
.tool-group .group-label { font: 500 0.68rem/1.4 var(--font-display); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.tool-group h2 { margin: 0.4rem 0 1.25rem; font: 700 1.4rem/1.3 var(--font-display); letter-spacing: -0.02em; }
.tool-row { display: flex; gap: 1rem; padding: 0.9rem 0; border-bottom: 1px solid var(--border); }
.tool-row .kind { flex: 0 0 3rem; font: 500 0.7rem/1.6 var(--font-display); color: var(--muted); }
.tool-row strong { font: 700 0.92rem/1.4 var(--font-display); }
.tool-row p { margin: 0.2rem 0 0; font-size: 0.86rem; color: var(--body-text, var(--ink)); }

.btn { display: inline-block; padding: 0.65rem 1.1rem; border: 1px solid var(--ink); font: 500 0.85rem/1.4 var(--font-display); color: var(--ink); }
.btn:hover { background: var(--ink); color: var(--surface); }
.btn--primary { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.btn--primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

/* Bio lists: about */
.bio-group { margin-bottom: 2.25rem; }
.bio-group h2 { margin: 0 0 1rem; font: 700 1.15rem/1.3 var(--font-display); letter-spacing: -0.01em; }
.bio-group ul { margin: 0; padding-left: 1.2rem; font-size: 0.96rem; line-height: 1.75; }
.bio-group ul li + li { margin-top: 0.3rem; }
.bio-group a { color: var(--accent); }

.entry-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1.25rem; }
.entry-card { display: block; padding: 1.25rem; border: 1px solid var(--border); }
.entry-card:hover { border-color: var(--ink); }
.entry-card .tag { display: block; margin-bottom: 0.6rem; font: 500 0.68rem/1.4 var(--font-display); letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.entry-card h2 { margin: 0 0 0.5rem; font: 700 1.05rem/1.3 var(--font-display); }
.entry-card p { margin: 0; font-size: 0.88rem; line-height: 1.5; color: var(--body-text, var(--ink)); }

/* Home page sections */
.home-section { margin-top: 3rem; }
.home-section .section-title { margin: 0 0 1.25rem; font: 700 1.35rem/1.3 var(--font-display); letter-spacing: -0.02em; }
.home-section .section-link { display: inline-block; margin-top: 1.25rem; font: 500 0.85rem/1.4 var(--font-display); color: var(--accent); }
.home-section .section-link:hover { color: var(--accent-dark); }

.teaser { padding: 1.75rem; border: 1px solid var(--border); }
.teaser p { margin: 0 0 1.1rem; max-width: 60ch; font-size: 0.95rem; line-height: 1.6; color: var(--body-text, var(--ink)); }
.teaser p:last-of-type { margin-bottom: 1.3rem; }

@media (max-width: 900px) {
  .site-shell { flex-direction: column; }
  .sidebar { position: static; height: auto; width: auto; flex: none; border-right: none; border-bottom: 1px solid var(--border); }
  .card-row { grid-template-columns: 1fr; }
  .card-row .card { border-left: none; border-top: 1px solid var(--border); }
  .card-row .card:first-child { border-top: none; }
}