/* 0VLD Blog — editorial, readable, not pitch-black */
:root {
  --b-bg: #0c1014;
  --b-surface: #141a20;
  --b-surface-2: #1a222a;
  --b-elevated: #1e2832;
  --b-border: rgba(120, 150, 170, 0.22);
  --b-border-hi: rgba(140, 170, 190, 0.38);
  --b-text: #e6edf2;
  --b-body: #c5d0d8;
  --b-muted: #8b9bab;
  --b-faint: #6a7a88;
  --b-accent: #7eb0c4;
  --b-accent-soft: rgba(126, 176, 196, 0.16);
  --b-radius: 12px;
  --b-font-d: "Space Grotesk", system-ui, sans-serif;
  --b-font: "Inter", system-ui, sans-serif;
  --b-mono: "JetBrains Mono", ui-monospace, monospace;
  --b-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --b-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
  --b-code-bg: #0f1419;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { background: var(--b-bg); scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; filter: none !important; }
  .preloader { display: none !important; }
}

body.blog-site {
  background:
    radial-gradient(ellipse 900px 500px at 80% -10%, rgba(126, 176, 196, 0.08), transparent 50%),
    var(--b-bg);
  color: var(--b-text);
  font-family: var(--b-font);
  font-size: 16.5px;
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* preloader (same family as main) */
.preloader {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--b-bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s;
}
.preloader.done { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader-brand {
  font-family: var(--b-font-d); font-weight: 700; font-size: 1.4rem;
  letter-spacing: 0.12em; color: var(--b-text); margin-bottom: 18px;
}
.preloader-bar {
  width: 120px; height: 2px; background: rgba(126, 176, 196, 0.2); border-radius: 2px; overflow: hidden;
}
.preloader-bar span {
  display: block; height: 100%; width: 0;
  background: var(--b-accent);
  animation: prefill 0.9s var(--b-ease) forwards;
}
@keyframes prefill { to { width: 100%; } }

#readingProgress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0; z-index: 60;
  background: linear-gradient(90deg, var(--b-accent), #a8d0e0);
  pointer-events: none;
}

/* page chrome — no sticky top nav; minimal brand strip */
.page-chrome {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 5vw 0; max-width: 1100px; margin: 0 auto;
}
.page-chrome a.brand {
  font-family: var(--b-font-d); font-weight: 700; font-size: 0.95rem;
  letter-spacing: 0.06em; color: var(--b-text); text-decoration: none;
  display: inline-flex; align-items: center; gap: 8px;
}
.page-chrome a.brand .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--b-accent); box-shadow: 0 0 10px var(--b-accent);
}
.page-chrome .back-link {
  font-family: var(--b-mono); font-size: 11px; letter-spacing: 0.06em;
  color: var(--b-muted); text-decoration: none;
}
.page-chrome .back-link:hover { color: var(--b-accent); }

.blog-shell { max-width: 1100px; margin: 0 auto; padding: 36px 5vw 64px; }
.blog-hero { margin-bottom: 40px; }
.blog-hero-kicker {
  font-family: var(--b-mono); font-size: 11px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--b-accent); margin-bottom: 10px;
}
.blog-hero h1 {
  font-family: var(--b-font-d); font-weight: 700;
  font-size: clamp(1.85rem, 3.8vw, 2.5rem); letter-spacing: -0.02em; margin-bottom: 10px;
}
.blog-hero p { color: var(--b-muted); max-width: 38em; font-size: 1.05rem; }

/* section folders on index */
.blog-sections { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.blog-sections a {
  font-family: var(--b-mono); font-size: 11px; letter-spacing: 0.05em;
  padding: 6px 12px; border-radius: 999px; text-decoration: none;
  border: 1px solid var(--b-border); color: var(--b-muted);
  background: var(--b-surface); transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.blog-sections a:hover, .blog-sections a.active {
  color: var(--b-text); border-color: var(--b-accent); background: var(--b-accent-soft);
}

.blog-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px;
}
.blog-card {
  display: flex; flex-direction: column; background: var(--b-surface);
  border: 1px solid var(--b-border); border-radius: var(--b-radius);
  overflow: hidden; text-decoration: none; color: inherit;
  box-shadow: var(--b-shadow);
  transition: transform 0.3s var(--b-ease), border-color 0.2s, box-shadow 0.3s;
}
.blog-card:hover {
  transform: translateY(-3px); border-color: var(--b-border-hi);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.4);
}
.blog-card-cover {
  aspect-ratio: 16 / 9; background: var(--b-surface-2); overflow: hidden;
}
.blog-card-cover img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 0.45s var(--b-ease);
}
.blog-card:hover .blog-card-cover img { transform: scale(1.03); }
.blog-card-body { padding: 18px 18px 20px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.blog-card-meta {
  font-family: var(--b-mono); font-size: 10.5px; letter-spacing: 0.05em;
  color: var(--b-faint); display: flex; gap: 10px; flex-wrap: wrap;
}
.blog-card h2 {
  font-family: var(--b-font-d); font-size: 1.12rem; font-weight: 600; line-height: 1.3;
}
.blog-card p { color: var(--b-muted); font-size: 0.92rem; line-height: 1.5; flex: 1; }
.blog-tag {
  font-family: var(--b-mono); font-size: 10px; padding: 3px 8px; border-radius: 999px;
  background: var(--b-accent-soft); color: var(--b-accent);
}

/* article */
.article-layout { max-width: 720px; margin: 0 auto; padding: 28px 5vw 80px; }
.article-kicker {
  font-family: var(--b-mono); font-size: 11px; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--b-accent); margin-bottom: 12px;
}
.article-header h1 {
  font-family: var(--b-font-d); font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.4rem); letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 14px;
}
.article-meta {
  font-family: var(--b-mono); font-size: 11.5px; color: var(--b-faint);
  display: flex; flex-wrap: wrap; gap: 12px;
}
.article-cover {
  margin: 24px 0 32px; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--b-border); box-shadow: var(--b-shadow);
}
.article-cover img { width: 100%; display: block; max-height: 400px; object-fit: cover; }

.article-body { color: var(--b-body); font-size: 1.05rem; line-height: 1.78; }
.article-body h2 {
  font-family: var(--b-font-d); font-size: 1.35rem; font-weight: 650;
  margin: 2.1em 0 0.65em; color: var(--b-text);
}
.article-body h3 {
  font-family: var(--b-font-d); font-size: 1.12rem; font-weight: 600;
  margin: 1.7em 0 0.5em; color: var(--b-text);
}
.article-body p { margin: 0 0 1.15em; }
.article-body a { color: var(--b-accent); text-underline-offset: 3px; }
.article-body ul, .article-body ol { margin: 0 0 1.15em 1.25em; }
.article-body li { margin-bottom: 0.35em; }
.article-body blockquote {
  margin: 1.3em 0; padding: 12px 16px; border-left: 3px solid var(--b-accent);
  background: var(--b-accent-soft); border-radius: 0 10px 10px 0; color: var(--b-muted);
}
.article-body img {
  max-width: 100%; height: auto; border-radius: 10px; margin: 1.3em 0;
  border: 1px solid var(--b-border); cursor: zoom-in; box-shadow: var(--b-shadow);
}

/* CODE — separated, elevated, readable */
.article-body pre,
.writeup-content pre {
  margin: 1.35em 0;
  padding: 18px 18px 18px 18px;
  background: var(--b-code-bg);
  border: 1px solid var(--b-border);
  border-radius: 10px;
  overflow-x: auto;
  font-family: var(--b-mono);
  font-size: 0.84rem;
  line-height: 1.6;
  position: relative;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.03);
  color: #c8d6df;
}
.article-body code,
.writeup-content code {
  font-family: var(--b-mono); font-size: 0.88em;
  background: rgba(126, 176, 196, 0.14); padding: 2px 6px; border-radius: 4px; color: #b8d4e0;
}
.article-body pre code,
.writeup-content pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

.article-nav {
  display: flex; justify-content: space-between; gap: 16px; margin-top: 48px;
  padding-top: 24px; border-top: 1px solid var(--b-border); flex-wrap: wrap;
}
.article-nav a {
  font-family: var(--b-mono); font-size: 12px; color: var(--b-muted); text-decoration: none;
}
.article-nav a:hover { color: var(--b-accent); }

/* footer hub — navigate between the 4 */
.site-footer {
  border-top: 1px solid var(--b-border);
  padding: 28px 5vw 36px;
  margin-top: 24px;
}
.footer-nav {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px;
  margin-bottom: 18px;
}
.footer-nav a {
  font-family: var(--b-mono); font-size: 11px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--b-muted); text-decoration: none;
  padding: 6px 10px; border-radius: 8px;
}
.footer-nav a:hover { color: var(--b-text); background: var(--b-accent-soft); }
.footer-copy {
  text-align: center; font-family: var(--b-mono); font-size: 11px;
  color: var(--b-faint); letter-spacing: 0.04em;
}

.reveal {
  opacity: 0; transform: translateY(16px); filter: blur(3px);
  transition: opacity 0.65s var(--b-ease), transform 0.65s var(--b-ease), filter 0.65s var(--b-ease);
}
.reveal.in { opacity: 1; transform: none; filter: none; }

/* lightbox */
.ovld-lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(0, 0, 0, 0.88);
  display: flex; align-items: center; justify-content: center; padding: 24px;
  opacity: 0; transition: opacity 0.22s ease;
}
.ovld-lightbox.open { opacity: 1; }
.ovld-lb-img {
  max-width: min(96vw, 1200px); max-height: 88vh; object-fit: contain;
  border-radius: 8px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}
.ovld-lb-close {
  position: absolute; top: 16px; right: 20px; background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15); color: #fff; width: 40px; height: 40px;
  border-radius: 50%; font-size: 16px; cursor: pointer;
}
.ovld-lb-caption {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  color: #aaa; font-size: 13px;
}
.copy-btn {
  position: absolute; top: 10px; right: 10px; font-family: var(--b-mono);
  font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 5px 10px; border-radius: 6px; border: 1px solid var(--b-border);
  background: rgba(20, 26, 32, 0.95); color: var(--b-muted); cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.copy-btn:hover, .copy-btn.copied {
  color: var(--b-text); border-color: var(--b-accent); background: var(--b-accent-soft);
}

@media (max-width: 640px) {
  .blog-grid { grid-template-columns: 1fr; }
}