/* =========================================================
   Design tokens
   A quiet, paper-neutral palette with one deep teal-green
   accent, and a "viewfinder" bracket motif on the profile
   photo — a small nod to detection-box framing, used once
   as the site's signature rather than repeated everywhere.
   ========================================================= */
:root {
  --bg: #f6f6f3;
  --ink: #14181a;
  --muted: #6b7280;
  --line: #dedfda;
  --accent: #1f6f54;
  --max-width: 680px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; }
a:hover, a:focus-visible { border-bottom-color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }

/* ---------- Header / nav ---------- */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 1.75rem; padding-bottom: 1.75rem; flex-wrap: wrap; gap: 0.75rem;
}
.site-mark { font-family: var(--font-mono); font-size: 0.95rem; letter-spacing: 0.04em; color: var(--ink); border-bottom: none; }
.site-mark:hover { color: var(--accent); }
.site-nav { display: flex; gap: 1.5rem; font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; }
.site-nav a { color: var(--muted); border-bottom: none; }
.site-nav a:hover { color: var(--accent); }
.site-nav a.active { color: var(--ink); }
.site-nav a.active::before { content: "["; color: var(--accent); margin-right: 2px; }
.site-nav a.active::after { content: "]"; color: var(--accent); margin-left: 2px; }

main { padding: 3rem 0 4rem; }

/* ---------- About / intro layout ---------- */
.intro { display: flex; gap: 2.5rem; align-items: flex-start; }
.intro-text { flex: 1; min-width: 0; }
.eyebrow { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin: 0.35rem 0 1.25rem; }
.intro h1 { font-size: 2.1rem; font-weight: 650; letter-spacing: -0.01em; margin: 0; }
.bio p { margin: 0 0 1.1rem; max-width: 54ch; }
.placeholder { color: var(--muted); font-style: italic; }

.connect { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; font-size: 0.95rem; margin-top: 1.5rem; padding: 0; list-style: none; }
.connect li { display: inline-flex; }
.connect li::after { content: "·"; margin-left: 1rem; color: var(--line); }
.connect li:last-child::after { content: ""; margin-left: 0; }

@media (max-width: 640px) {
  .intro { flex-direction: column; }
}

/* ---------- Viewfinder photo frame (signature element) ---------- */
.viewfinder { position: relative; display: inline-block; padding: 10px; flex-shrink: 0; }
.tick { position: absolute; width: 18px; height: 18px; }
.tick-tl { top: 0; left: 0; border-top: 2px solid var(--accent); border-left: 2px solid var(--accent); }
.tick-tr { top: 0; right: 0; border-top: 2px solid var(--accent); border-right: 2px solid var(--accent); }
.tick-bl { bottom: 0; left: 0; border-bottom: 2px solid var(--accent); border-left: 2px solid var(--accent); }
.tick-br { bottom: 0; right: 0; border-bottom: 2px solid var(--accent); border-right: 2px solid var(--accent); }
.profile-photo { width: 200px; height: 200px; object-fit: cover; display: block; background: var(--line); }

/* ---------- Articles index ---------- */
.page-title { font-size: 1.75rem; font-weight: 650; letter-spacing: -0.01em; margin-bottom: 0.5rem; }
.page-intro { color: var(--muted); margin-bottom: 2.5rem; max-width: 60ch; }

.article-list { list-style: none; padding: 0; margin: 0; }
.article-entry { padding: 1.75rem 0; border-bottom: 1px solid var(--line); }
.article-entry:first-child { padding-top: 0; }
.article-entry h2 { font-size: 1.25rem; margin: 0 0 0.4rem; }
.article-entry h2 a { color: var(--ink); border-bottom: none; }
.article-entry h2 a:hover { color: var(--accent); }
.meta { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.03em; color: var(--muted); margin-bottom: 0.6rem; }
.meta .tag { margin-right: 0.6rem; }
.excerpt { margin: 0; max-width: 60ch; }

/* ---------- Single article ---------- */
.back-link { font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.03em; display: inline-block; margin-bottom: 2rem; color: var(--muted); border-bottom: none; }
.back-link:hover { color: var(--accent); }
article h1 { font-size: 1.9rem; letter-spacing: -0.01em; margin: 0 0 0.6rem; }
article .meta { margin-bottom: 2rem; }
article figure { margin: 2rem 0; }
article img { max-width: 100%; height: auto; display: block; border: 1px solid var(--line); }
article figcaption { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); margin-top: 0.6rem; }
article p { margin: 0 0 1.2rem; max-width: 66ch; }
article h2 { font-size: 1.25rem; margin: 2rem 0 1rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 2rem; }
.site-footer .container { padding: 1.75rem 1.5rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.75rem; font-size: 0.85rem; color: var(--muted); }
.site-footer a { color: var(--muted); border-bottom: none; }
.site-footer a:hover { color: var(--accent); }