/* =========================================================
   Carlo Perassi — carlok.github.io
   Terminal window · mono · GitHub-dark bg · blue accent
   ========================================================= */

:root {
  --bg-body: #0d1117;
  --bg: #161b22;
  --bg-raised: #1c2229;
  --line: #2a323c;
  --text: #f0f6fc;
  --t3: #9198a1;
  --accent: #79c0ff;
  --accent-dim: #2d5a80;
  --amber: #ffab70;
  --pink: #ff7edb;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 17.5px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  max-width: 840px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(6px);
  z-index: 10;
}
.nav {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 16px 0;
}
.brand {
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  flex: 0 0 auto;
}
.brand::before { content: "~/ "; color: var(--t3); }
.nav-links { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.nav-links a {
  color: var(--t3);
  text-decoration: none;
}
.nav-links a:hover { color: var(--text); text-decoration: underline; }
.nav-links a.active { color: var(--accent); text-decoration: underline; text-underline-offset: 4px; }
.nav-links a.external { color: var(--amber); }

/* ---------- Content ---------- */
.content { padding: 40px 0 96px; min-height: 60vh; }

h1, h2, h3, h4 {
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
h1 { font-size: 40px; font-weight: 700; letter-spacing: -0.02em; margin: 0 0 12px; text-wrap: balance; }
h2 { font-size: 22px; font-weight: 600; margin: 44px 0 14px; color: var(--text); text-wrap: balance; }
h2::before { content: "$ "; color: var(--t3); font-weight: 400; }
h3 { font-size: 19px; font-weight: 600; margin: 0 0 6px; }
p { margin: 0 0 16px; color: var(--t3); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- Terminal prompt lines ---------- */
.prompt {
  color: var(--t3);
  margin: 0 0 8px;
}
.prompt b { color: var(--accent); font-weight: 500; }

.cmd {
  color: var(--t3);
  margin: 36px 0 10px;
}
.cmd::before { content: "$ "; color: var(--t3); }
.cmd b, .cmd a { color: var(--accent); }

/* ---------- Window chrome (macOS-style terminal window) ---------- */
.window {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
  margin-bottom: 28px;
}
.titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-raised);
  border-bottom: 1px solid var(--line);
}
.dot { width: 11px; height: 11px; border-radius: 50%; flex: 0 0 auto; }
.dot.r { background: #ff5f56; }
.dot.y { background: #ffbd2e; }
.dot.g { background: #27c93f; }
.titlebar .filename {
  margin-left: 8px;
  color: var(--t3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.pane { padding: 26px 26px 30px; }
.pane .prompt { margin-bottom: 8px; }
.pane h1 { font-size: clamp(26px, 5vw, 38px); }
.pane .tagline { margin-bottom: 0; }

.cursor {
  display: inline-block;
  width: 9px;
  height: 0.85em;
  background: var(--accent);
  vertical-align: -1px;
  margin-left: 4px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Tab bar (below the window, page-level nav) ---------- */
.tabbar {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 26px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabbar::-webkit-scrollbar { display: none; }
.tab {
  padding: 8px 16px;
  color: var(--t3);
  border-bottom: 2px solid transparent;
  flex: 0 0 auto;
  white-space: nowrap;
  text-decoration: none;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-color: var(--accent); }

/* ---------- Hero (used inside .pane) ---------- */
.hero-title {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 10px;
  color: var(--text);
}
.tagline {
  color: var(--t3);
  max-width: 42em;
  margin: 0;
}
.tagline a { color: var(--accent); }

/* ---------- Tree lists ---------- */
ul.tree, .content ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
ul.tree li, .content li {
  padding: 8px 0 8px 34px;
  border-left: 1px dashed var(--line);
  position: relative;
  color: var(--t3);
}
ul.tree li::before, .content li::before { content: "├──"; position: absolute; left: -1px; top: 8px; color: var(--accent-dim); }
ul.tree li:last-child::before, .content li:last-child::before { content: "└──"; }
ul.tree li a, .content li a { color: var(--accent); text-decoration: none; }
ul.tree li a:hover, .content li a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Feature (LeanFrontier spotlight / callouts) ---------- */
.feature {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-raised);
  padding: 20px 22px;
  margin: 8px 0;
}
.feature .label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--pink);
}
.feature h3 { font-size: 21px; margin: 8px 0 10px; color: var(--text); }
.feature p { color: var(--t3); margin: 0 0 14px; }
.feature a { color: var(--accent); }
.feature a:hover { text-decoration: underline; }

/* ---------- Tag pills (post tags — real links to /blog/tag/<name>/) ---------- */
.badge {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--t3);
  background: rgba(121, 192, 255, 0.1);
  border: 1px solid rgba(121, 192, 255, 0.25);
  border-radius: 2em;
  padding: 2px 9px;
  white-space: nowrap;
  text-decoration: none;
}
a.badge:hover, a.badge:focus-visible { color: var(--accent); background: rgba(121, 192, 255, 0.18); border-color: var(--accent-dim); }
.badge.current { color: var(--accent); background: rgba(121, 192, 255, 0.2); border-color: var(--accent); }

/* ---------- Blog listing / post cards ---------- */
.post-card {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.post-card:first-of-type { border-top: none; }
.post-card h2 { margin: 8px 0 8px; font-size: 18px; font-weight: 600; }
.post-card h2::before { content: none; }
.post-card h2 a { color: var(--text); }
.post-card h2 a:hover { color: var(--accent); text-decoration: none; }
.post-card .excerpt { color: var(--t3); margin: 0; line-height: 1.65; }
.post-card .excerpt p { margin: 0; }
.post-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.post-meta time {
  color: var(--accent-dim);
  letter-spacing: 0.5px;
}

/* ---------- Single post ---------- */
.post { max-width: none; }
.post-header { padding: 0; }
.post-header h1 { font-size: clamp(26px, 5vw, 38px); margin: 14px 0 18px; line-height: 1.3; text-wrap: balance; }
.post-body { line-height: 1.75; color: var(--t3); }
.post-body p { color: var(--t3); max-width: 640px; }
.post-body h2 { margin-top: 36px; }
.post-body code {
  font-family: var(--font-mono);
  background: var(--bg-raised);
  color: var(--text);
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 3px;
}
.post-footer {
  margin-top: 8px;
  padding-top: 0;
  border-top: none;
}
.post-footer a { color: var(--accent); text-decoration: none; }
.post-footer a:hover { text-decoration: underline; }
.post-footer a::before { content: "← "; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 56px;
}
.footer {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--t3);
}
.footer a { color: var(--accent); }
.footer a:hover { text-decoration: underline; }

/* ---------- CV page ---------- */
.hero-split { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.hero-body { flex: 1 1 320px; min-width: 0; }
.avatar {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  flex: 0 0 auto;
  background: var(--bg-raised);
  box-shadow: 0 0 0 1px var(--line), 0 0 0 5px var(--bg-raised), 0 0 0 6px var(--accent-dim);
  object-fit: cover;
}
.social {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.social a { display: flex; align-items: center; gap: 7px; color: var(--t3); }
.social a:hover { color: var(--accent); text-decoration: none; }
.social svg { width: 15px; height: 15px; fill: currentColor; flex: 0 0 auto; opacity: 0.85; }
.social a:hover svg { opacity: 1; }

.columns { display: grid; grid-template-columns: 1fr; gap: 0; margin-top: 8px; }
.columns .col:first-child h2 { margin-top: 0; }
.col h3 {
  color: var(--text);
  margin: 22px 0 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  opacity: 0.85;
}
.col h3:first-of-type { margin-top: 0; }
.col .yr { color: var(--t3); font-variant-numeric: tabular-nums; }

.consent { margin-top: 36px; color: var(--t3); max-width: none; }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .nav { padding-top: 12px; padding-bottom: 12px; }
  .hero-split { flex-direction: column; text-align: center; }
  .avatar { width: 150px; height: 150px; }
  .social { justify-content: center; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .pane { padding: 20px 18px 24px; }
  .content { padding: 28px 0 70px; }
  .feature { padding: 16px 18px; }
}