:root{
  --bg: #0a121c;
  --bg-raised: #101c29;
  --bg-card: #121f30;
  --bg-card-hover: #16283c;
  --line: #223247;
  --line-soft: #182636;
  --text: #e9eef5;
  --text-dim: #94a7bb;
  --text-faint: #5f7690;
  --accent: #ff9d3d;
  --accent-soft: rgba(255,157,61,0.12);
  --accent-line: rgba(255,157,61,0.35);
  --ok: #5fd68a;
  --radius: 3px;
  --maxw: 1100px;
  --maxw-article: 720px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection{ background: var(--accent); color: #14100a; }

a{ color: inherit; text-decoration: none; }

h1,h2,h3{
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
}

.mono{ font-family: 'IBM Plex Mono', monospace; }

.wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

a:focus-visible, button:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
}

/* ---------- NAV ---------- */
header.nav{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,18,28,0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height: 64px;
}
.brand{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 15px;
  color: var(--text);
  display:flex;
  align-items:center;
  gap:8px;
}
.brand .dot{
  width:7px; height:7px; border-radius:50%;
  background: var(--accent);
  box-shadow: 0 0 8px 1px var(--accent);
}
nav.links{ display:flex; gap: 28px; }
nav.links a{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--text-dim);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
nav.links a:hover{ color: var(--text); border-color: var(--accent-line); }

/* ---------- HERO ---------- */
.hero{
  position: relative;
  overflow: hidden;
  padding: 96px 0 88px;
  border-bottom: 1px solid var(--line-soft);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items:center;
}
.eyebrow{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--accent);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom: 22px;
}
.eyebrow::before{
  content:"";
  width: 22px; height:1px;
  background: var(--accent);
  display:inline-block;
}
.hero h1{
  font-size: clamp(2.2rem, 4.4vw, 3.4rem);
  line-height: 1.12;
  color: var(--text);
}
.hero h1 span{ color: var(--accent); }
.typeline{
  margin-top: 22px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 15px;
  color: var(--text-dim);
  min-height: 24px;
}
.typeline .cursor{
  display:inline-block;
  width: 8px; height: 15px;
  background: var(--accent);
  margin-left: 3px;
  vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink{ 50%{ opacity: 0; } }

.hero p.lead{
  margin-top: 22px;
  max-width: 46ch;
  color: var(--text-dim);
  font-size: 16px;
}
.hero-cta{ display:flex; gap:14px; margin-top: 34px; flex-wrap: wrap; }
.btn{
  font-family:'IBM Plex Mono', monospace;
  font-size: 13px;
  padding: 12px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  transition: border-color .15s ease, background .15s ease, transform .15s ease;
  display:inline-block;
}
.btn-primary{
  background: var(--accent);
  color: #14100a;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-primary:hover{ transform: translateY(-1px); }
.btn-ghost{ color: var(--text-dim); }
.btn-ghost:hover{ color: var(--text); border-color: var(--accent-line); }

/* radar signature element */
.radar-wrap{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  height: 100%;
}
.radar{
  width: min(340px, 100%);
  aspect-ratio: 1/1;
  position:relative;
}
.radar svg{ width:100%; height:100%; }
.radar-ring{ fill:none; stroke: var(--line); stroke-width: 1; }
.radar-crosshair{ stroke: var(--line-soft); stroke-width: 1; }
.radar-sweep{
  transform-origin: 150px 150px;
  animation: sweep 4s linear infinite;
}
@keyframes sweep{ from{ transform: rotate(0deg); } to{ transform: rotate(360deg); } }
.radar-blip{
  fill: var(--accent);
  animation: blip 2.6s ease-in-out infinite;
}
@keyframes blip{ 0%,100%{ opacity: .25; } 50%{ opacity: 1; } }

@media (max-width: 820px){
  .hero-grid{ grid-template-columns: 1fr; }
  .radar-wrap{ order: -1; height: 200px; margin-bottom: 8px; }
  .radar{ width: 180px; }
  nav.links{ display:none; }
}

/* ---------- SECTION SHELL ---------- */
section{ padding: 78px 0; border-bottom: 1px solid var(--line-soft); }
section:last-of-type{ border-bottom: none; }
.section-head{
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 40px;
  gap: 20px;
  flex-wrap: wrap;
}
.section-head h2{ font-size: 1.6rem; }
.section-tag{
  font-family:'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- ABOUT / FOCUS ---------- */
.about-text{ max-width: 62ch; color: var(--text-dim); margin-bottom: 44px; }
.about-text p + p{ margin-top: 14px; }
.about-text strong{ color: var(--text); font-weight: 600; }

.focus-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.focus-card{
  background: var(--bg-card);
  padding: 30px 26px;
}
.focus-index{
  font-family:'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 16px;
  display:block;
}
.focus-card h3{ font-size: 1.05rem; margin-bottom: 10px; }
.focus-card p{ color: var(--text-dim); font-size: 14.5px; }

@media (max-width: 820px){
  .focus-grid{ grid-template-columns: 1fr; }
}

/* ---------- BLOG ---------- */
.filters{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.filter-pill{
  font-family:'IBM Plex Mono', monospace;
  font-size: 12.5px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 20px;
  color: var(--text-dim);
  cursor: pointer;
  background: transparent;
  transition: all .15s ease;
}
.filter-pill:hover{ border-color: var(--accent-line); color: var(--text); }
.filter-pill.active{
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent);
}

.post-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.post-card{
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  padding: 26px;
  border-radius: var(--radius);
  transition: border-color .15s ease, background .15s ease, transform .15s ease;
  display:flex;
  flex-direction:column;
  gap: 14px;
  cursor: pointer;
}
.post-card:hover{
  border-color: var(--accent-line);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.post-meta{
  display:flex;
  align-items:center;
  gap: 12px;
  font-family:'IBM Plex Mono', monospace;
  font-size: 11.5px;
  color: var(--text-faint);
}
.post-tag{
  color: var(--accent);
  border: 1px solid var(--accent-line);
  padding: 2px 8px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.post-card h3{ font-size: 1.15rem; line-height: 1.3; }
.post-card p{ color: var(--text-dim); font-size: 14.5px; }
.post-card .readmore{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  color: var(--text-dim);
  margin-top: auto;
}
.post-card:hover .readmore{ color: var(--accent); }

.post-card.hidden{ display:none; }

@media (max-width: 820px){
  .post-grid{ grid-template-columns: 1fr; }
}

/* ---------- SIDE LOG (personal / reading) ---------- */
.log{
  display:flex;
  flex-direction:column;
  gap: 0;
}
.log-row{
  display:grid;
  grid-template-columns: 130px 1fr auto;
  gap: 18px;
  align-items:center;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
}
.log-row:last-child{ border-bottom:none; }
.log-date{
  font-family:'IBM Plex Mono', monospace;
  color: var(--text-faint);
  font-size: 12.5px;
}
.log-status{
  font-family:'IBM Plex Mono', monospace;
  font-size: 11.5px;
  color: var(--ok);
  white-space: nowrap;
}
.log-title{ color: var(--text-dim); }
.log-title strong{ color: var(--text); font-weight: 500; }

@media (max-width: 640px){
  .log-row{ grid-template-columns: 1fr; gap: 4px; }
}

/* ---------- CONTACT / FOOTER ---------- */
footer{ padding: 70px 0 50px; }
.contact-inner{
  display:flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
}
.contact-inner h2{ font-size: 1.8rem; max-width: 14ch; }
.contact-links{ display:flex; flex-direction:column; gap: 10px; }
.contact-links a{
  font-family:'IBM Plex Mono', monospace;
  font-size: 14px;
  color: var(--text-dim);
  display:flex;
  align-items:center;
  gap: 8px;
}
.contact-links a:hover{ color: var(--accent); }
.contact-links a::before{ content:"→"; color: var(--text-faint); }
.contact-links a:hover::before{ color: var(--accent); }

.footer-bottom{
  margin-top: 60px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  display:flex;
  justify-content: space-between;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--text-faint);
  flex-wrap: wrap;
  gap: 10px;
}

/* ================= ARTICLE PAGES ================= */
.article-hero{
  padding: 56px 0 44px;
  border-bottom: 1px solid var(--line-soft);
}
.back-link{
  font-family:'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--text-dim);
  display:inline-flex;
  align-items:center;
  gap: 8px;
  margin-bottom: 30px;
  transition: color .15s ease;
}
.back-link:hover{ color: var(--accent); }
.article-hero .wrap{ max-width: var(--maxw-article); }
.article-hero h1{
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  line-height: 1.2;
  margin-top: 18px;
}
.article-hero .post-meta{ margin-top: 0; }

.article-body{
  padding: 56px 0 30px;
}
.article-body .wrap{ max-width: var(--maxw-article); }
.article-body p{
  color: var(--text-dim);
  margin: 0 0 20px;
  font-size: 16.5px;
}
.article-body h2{
  font-size: 1.35rem;
  margin: 44px 0 16px;
  color: var(--text);
}
.article-body h2:first-child{ margin-top: 0; }
.article-body ul, .article-body ol{
  color: var(--text-dim);
  margin: 0 0 20px;
  padding-left: 22px;
}
.article-body li{ margin-bottom: 8px; }
.article-body strong{ color: var(--text); font-weight: 600; }
.article-body code{
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.9em;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--accent);
}
.article-body pre{
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 0 0 24px;
}
.article-body pre code{
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
  font-size: 13.5px;
  line-height: 1.6;
}
.article-body blockquote{
  border-left: 2px solid var(--accent-line);
  margin: 28px 0;
  padding: 4px 0 4px 20px;
  color: var(--text);
  font-style: italic;
}

.article-footer{
  padding: 30px 0 70px;
}
.article-footer .wrap{ max-width: var(--maxw-article); }
.article-nav{
  display:flex;
  justify-content: space-between;
  padding-top: 30px;
  border-top: 1px solid var(--line-soft);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--text-dim);
}
.article-nav a:hover{ color: var(--accent); }