/* ============================================================
   Amir Sohil — Portfolio
   Design system: warm-charcoal dark mode, Switzer display/body,
   JetBrains Mono utility face, signature lime accent (#CDFD50).
   ============================================================ */

@import url('https://api.fontshare.com/v2/css?f[]=switzer@400,500,600,700,800,900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  --bg: #0B0C09;
  --bg-raised: #14150F;
  --bg-raised-2: #191A13;
  --line: #26271E;
  --line-bright: #3A3C2C;
  --text: #F3F2E9;
  --text-dim: #91907F;
  --text-dimmer: #5C5C50;
  --accent: #CDFD50;
  --accent-dim: #9BC23C;
  --accent-wash: rgba(205, 253, 80, 0.08);

  --font-display: 'Switzer', -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Menlo, monospace;

  --container: 1240px;
  --edge: clamp(20px, 5vw, 64px);
  --radius: 3px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* subtle grain so the flat dark bg never looks like a solid CSS fill */
body::before{
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a{ color: inherit; text-decoration: none; }
img{ max-width: 100%; display: block; }
ul{ margin: 0; padding: 0; list-style: none; }
h1,h2,h3,h4,p{ margin: 0; }
button{ font-family: inherit; cursor: pointer; }

::selection{ background: var(--accent); color: #0B0C09; }

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

.skip-link{
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #0B0C09;
  padding: 10px 16px; z-index: 1000; font-family: var(--font-mono); font-size: 13px;
}
.skip-link:focus{ left: var(--edge); top: 12px; }

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

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex; align-items: center; gap: 10px;
}
.eyebrow::before{
  content: "";
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 1px;
  flex-shrink: 0;
}

/* ---------------- Nav ---------------- */
.site-header{
  position: sticky; top: 0; z-index: 500;
  background: rgba(11,12,9,0.82);
  backdrop-filter: blur(10px) saturate(1.1);
  -webkit-backdrop-filter: blur(10px) saturate(1.1);
  border-bottom: 1px solid var(--line);
}
.nav{
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.nav-mark{
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  display: flex; align-items: center; gap: 8px;
}
.nav-mark .dot{ width: 7px; height: 7px; background: var(--accent); border-radius: 50%; }
.nav-links{
  display: flex; align-items: center; gap: 2px;
}
.nav-links a{
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 8px 14px;
  border-radius: 20px;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.nav-links a:hover{ color: var(--text); background: var(--bg-raised); }
.nav-links a.is-active{ color: var(--bg); background: var(--accent); }
.nav-cta{
  display: flex; align-items: center; gap: 10px;
}
.btn-cv{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text);
  border: 1px solid var(--line-bright);
  padding: 9px 16px;
  border-radius: 20px;
  display: inline-flex; align-items: center; gap: 8px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}
.btn-cv:hover{ border-color: var(--accent); color: var(--accent); }
.btn-cv svg{ width: 13px; height: 13px; }

.nav-toggle{
  display: none;
  background: none; border: none; color: var(--text);
  width: 40px; height: 40px; align-items: center; justify-content: center;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content: ""; display: block; width: 20px; height: 1.5px; background: var(--text);
  position: relative; transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle span::before{ position: absolute; top: -6px; }
.nav-toggle span::after{ position: absolute; top: 6px; }

/* ---------------- Buttons ---------------- */
.btn{
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  padding: 14px 24px;
  border-radius: 30px;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
  border: 1px solid transparent;
}
.btn-primary{ background: var(--accent); color: #0B0C09; }
.btn-primary:hover{ transform: translateY(-2px); background: #dcff7c; }
.btn-ghost{ border-color: var(--line-bright); color: var(--text); background: none; }
.btn-ghost:hover{ transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }
.btn svg{ width: 14px; height: 14px; transition: transform 0.25s var(--ease); }
.btn:hover svg{ transform: translate(2px,-2px); }

/* ---------------- Hero ---------------- */
.hero{
  position: relative;
  min-height: min(92vh, 860px);
  display: flex; flex-direction: column; justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero-canvas{
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  opacity: 0.85;
}
.hero-inner{
  position: relative; z-index: 2;
  padding: 120px var(--edge) 64px;
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
}
.hero-eyebrow{ margin-bottom: 28px; }
.hero-title{
  font-size: clamp(42px, 8vw, 104px);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: -0.03em;
  max-width: 16ch;
}
.hero-title .line{ display: block; overflow: hidden; }
.hero-title em{
  font-style: normal;
  color: var(--accent);
}
.hero-rule{
  width: 100%; max-width: 420px;
  height: 1px; background: var(--line-bright);
  margin: 28px 0;
}
.hero-sub{
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-dim);
  max-width: 46ch;
  line-height: 1.6;
  font-weight: 400;
}
.hero-actions{
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-top: 40px;
}

/* ---------------- Marquee ---------------- */
.marquee-strip{
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: var(--bg-raised);
}
.marquee-track{
  display: flex; width: max-content;
  animation: scroll-left 38s linear infinite;
}
@media (prefers-reduced-motion: reduce){ .marquee-track{ animation: none; } }
@keyframes scroll-left{ from{ transform: translateX(0); } to{ transform: translateX(-50%); } }
.marquee-track span{
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dimmer);
  padding: 16px 28px;
  white-space: nowrap;
  border-right: 1px solid var(--line);
}
.marquee-track span i{ color: var(--accent-dim); font-style: normal; margin-right: 10px; }

/* ---------------- Spec / readout table ---------------- */
.spec{
  border-bottom: 1px solid var(--line);
}
.spec-grid{
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.spec-item{
  padding: 26px var(--edge);
  border-right: 1px solid var(--line);
}
.spec-item:last-child{ border-right: none; }
.spec-key{
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dimmer);
  margin-bottom: 10px;
}
.spec-val{
  font-size: 17px; font-weight: 600; line-height: 1.35;
}
.spec-val small{ display:block; font-family: var(--font-mono); font-weight: 400; font-size: 12px; color: var(--text-dim); margin-top: 4px; text-transform: none; letter-spacing: 0; }

/* ---------------- Section shell ---------------- */
.section{ padding: 96px var(--edge); }
.section-head{
  display: flex; justify-content: space-between; align-items: flex-end; gap: 24px;
  margin-bottom: 48px; flex-wrap: wrap;
}
.section-title{
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800; letter-spacing: -0.02em;
  margin-top: 12px;
}
.section-link{
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--text-dim); display: inline-flex; align-items: center; gap: 8px;
  padding-bottom: 4px; border-bottom: 1px solid var(--line-bright);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.section-link:hover{ color: var(--accent); border-color: var(--accent); }

/* ---------------- Project / essay cards ---------------- */
.card-grid{
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.card-grid.two-col{ grid-template-columns: repeat(2, 1fr); }
.card{
  background: var(--bg);
  display: flex; flex-direction: column;
  transition: background 0.25s var(--ease);
}
.card:hover{ background: var(--bg-raised); }
.card-media{
  aspect-ratio: 16/10; overflow: hidden; background: var(--bg-raised-2);
  border-bottom: 1px solid var(--line);
  position: relative;
}
.card-media img{
  width: 100%; height: 100%; object-fit: cover;
  filter: grayscale(45%) contrast(1.05) brightness(0.92);
  transition: transform 0.6s var(--ease), filter 0.4s var(--ease);
}
.card:hover .card-media img{ transform: scale(1.045); filter: grayscale(0%) contrast(1.05) brightness(1); }
.card-body{ padding: 24px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.card-tags{ display: flex; flex-wrap: wrap; gap: 6px; }
.tag{
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 4px 9px; border: 1px solid var(--line-bright); border-radius: 20px; color: var(--text-dim);
}
.tag.tool{ color: var(--accent-dim); border-color: rgba(205,253,80,0.28); }
.card-title{ font-size: 19px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.3; }
.card-desc{ font-size: 14.5px; color: var(--text-dim); line-height: 1.55; flex: 1; }
.card-link{
  margin-top: auto; font-family: var(--font-mono); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--text); display: inline-flex; align-items: center; gap: 6px;
}
.card:hover .card-link{ color: var(--accent); }
.card-link svg{ width: 12px; height: 12px; transition: transform .25s var(--ease); }
.card:hover .card-link svg{ transform: translate(2px,-2px); }

/* ---------------- Filter / search UI ---------------- */
.filter-panel{
  border: 1px solid var(--line);
  background: var(--bg-raised);
  padding: 24px; margin-bottom: 40px;
}
.search-row{
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--line-bright);
  padding: 12px 16px; background: var(--bg);
}
.search-row svg{ width: 16px; height: 16px; color: var(--text-dimmer); flex-shrink: 0; }
.search-row input{
  flex: 1; background: none; border: none; outline: none; color: var(--text);
  font-family: var(--font-mono); font-size: 14px;
}
.search-row input::placeholder{ color: var(--text-dimmer); }
.search-count{ font-family: var(--font-mono); font-size: 12px; color: var(--text-dimmer); white-space: nowrap; }

.filter-groups{ display: flex; flex-direction: column; gap: 16px; margin-top: 20px; }
.filter-group-label{
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dimmer); margin-bottom: 10px; display: block;
}
.chip-row{ display: flex; flex-wrap: wrap; gap: 8px; }
.chip{
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.02em;
  padding: 7px 13px; border: 1px solid var(--line-bright); border-radius: 20px;
  color: var(--text-dim); background: none; transition: all 0.18s var(--ease);
}
.chip:hover{ border-color: var(--text-dim); color: var(--text); }
.chip.is-active{ background: var(--accent); border-color: var(--accent); color: #0B0C09; font-weight: 600; }
.filter-clear{
  font-family: var(--font-mono); font-size: 12px; color: var(--text-dimmer); text-decoration: underline;
  text-underline-offset: 3px; align-self: flex-start; margin-top: 4px; background: none; border: none; padding: 0;
}
.filter-clear:hover{ color: var(--accent); }

.empty-state{
  padding: 80px 20px; text-align: center; color: var(--text-dim);
  font-family: var(--font-mono); font-size: 14px; border: 1px dashed var(--line-bright);
}

/* ---------------- About page ---------------- */
.pull-quote{
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 700; letter-spacing: -0.015em; line-height: 1.25;
  max-width: 22ch; margin: 24px 0 56px;
}
.pull-quote span{ color: var(--accent); }
.about-grid{
  display: grid; grid-template-columns: 320px 1fr; gap: 64px;
}
.about-photo{
  aspect-ratio: 4/5; overflow: hidden; border: 1px solid var(--line); position: sticky; top: 100px; height: fit-content;
}
.about-photo img{ width: 100%; height: 100%; object-fit: cover; filter: grayscale(100%) contrast(1.08) brightness(0.95); }
.about-copy p{ font-size: 16.5px; line-height: 1.75; color: var(--text-dim); margin-bottom: 22px; max-width: 62ch; }
.about-copy strong{ color: var(--text); font-weight: 600; }

.aside-card{
  border-left: 2px solid var(--accent); background: var(--bg-raised);
  padding: 22px 26px; margin: 36px 0; max-width: 62ch;
}
.aside-card .eyebrow{ margin-bottom: 10px; }
.aside-card p{ color: var(--text-dim); font-size: 15px; line-height: 1.7; margin: 0; }

.taglist{ display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }

/* ---------------- Contact ---------------- */
.contact-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.contact-list{ border-top: 1px solid var(--line); }
.contact-row{
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px 0; border-bottom: 1px solid var(--line);
  font-size: 17px;
}
.contact-row .k{ font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dimmer); }
.contact-row .v{ display: flex; align-items: center; gap: 12px; }
.contact-row a{ transition: color 0.2s var(--ease); }
.contact-row a:hover{ color: var(--accent); }
.copy-btn{
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dimmer); background: none; border: 1px solid var(--line-bright);
  padding: 4px 9px; border-radius: 14px;
}
.copy-btn:hover{ color: var(--accent); border-color: var(--accent); }

.form-field{ margin-bottom: 20px; }
.form-field label{ display: block; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-dimmer); margin-bottom: 8px; }
.form-field input, .form-field textarea{
  width: 100%; background: var(--bg-raised); border: 1px solid var(--line-bright); color: var(--text);
  padding: 13px 14px; font-family: var(--font-display); font-size: 15px; resize: vertical;
}
.form-field input:focus, .form-field textarea:focus{ border-color: var(--accent); outline: none; }
.form-note{ font-size: 12.5px; color: var(--text-dimmer); margin-top: 10px; line-height: 1.6; }

/* ---------------- Footer ---------------- */
.site-footer{ border-top: 1px solid var(--line); padding: 56px var(--edge) 40px; }
.footer-top{ display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; flex-wrap: wrap; margin-bottom: 40px; }
.footer-title{ font-size: clamp(26px,4vw,40px); font-weight: 800; letter-spacing: -0.02em; max-width: 14ch; }
.footer-links{ display: flex; gap: 28px; flex-wrap: wrap; }
.footer-links a{ font-family: var(--font-mono); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-dim); }
.footer-links a:hover{ color: var(--accent); }
.footer-bottom{ display: flex; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 24px; font-family: var(--font-mono); font-size: 12px; color: var(--text-dimmer); flex-wrap: wrap; gap: 10px; }

.back-to-top{
  position: fixed; right: 24px; bottom: 24px; z-index: 400;
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--bg-raised); border: 1px solid var(--line-bright); color: var(--text);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), border-color .2s;
}
.back-to-top.is-visible{ opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover{ border-color: var(--accent); color: var(--accent); }

/* ---------------- 404 ---------------- */
.error-page{ min-height: 80vh; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: 0 var(--edge); }
.error-code{ font-family: var(--font-mono); color: var(--accent); font-size: 15px; letter-spacing: 0.1em; margin-bottom: 20px; }
.error-title{ font-size: clamp(32px, 6vw, 64px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 20px; }

/* ---------------- Mobile nav overlay ---------------- */
.mobile-nav{
  position: fixed; inset: 0; background: var(--bg); z-index: 900;
  display: flex; flex-direction: column; justify-content: center; padding: var(--edge);
  transform: translateY(-100%); transition: transform 0.35s var(--ease);
}
.mobile-nav.is-open{ transform: translateY(0); }
.mobile-nav a{
  font-size: clamp(32px, 9vw, 52px); font-weight: 800; letter-spacing: -0.02em;
  padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--text-dim);
}
.mobile-nav a.is-active{ color: var(--accent); }
.mobile-nav-close{
  position: absolute; top: 22px; right: var(--edge); background: none; border: none; color: var(--text); width: 40px; height: 40px;
}

/* ---------------- Responsive ---------------- */
@media (max-width: 900px){
  .nav-links{ display: none; }
  .nav-toggle{ display: flex; }
  .spec-grid{ grid-template-columns: repeat(2,1fr); }
  .spec-item:nth-child(2){ border-right: none; }
  .card-grid{ grid-template-columns: repeat(2,1fr); }
  .about-grid{ grid-template-columns: 1fr; }
  .about-photo{ position: static; max-width: 280px; }
  .contact-grid{ grid-template-columns: 1fr; gap: 48px; }
}
@media (max-width: 620px){
  .section{ padding: 64px var(--edge); }
  .spec-grid{ grid-template-columns: 1fr; }
  .spec-item{ border-right: none; border-bottom: 1px solid var(--line); }
  .spec-item:last-child{ border-bottom: none; }
  .card-grid{ grid-template-columns: 1fr; }
  .btn-cv .btn-cv-label{ display: none; }
  .hero-actions{ flex-direction: column; align-items: stretch; }
  .footer-top{ flex-direction: column; }
}

/* ============================================================
   Detail pages (project / essay templates)
   Appended block — safe to merge into an existing style.css.
   ============================================================ */

.progress-bar{
  position: fixed; top: 0; left: 0; height: 3px; width: 0%;
  background: var(--accent); z-index: 1000;
}

.breadcrumb{
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; text-transform: uppercase;
  color: var(--text-dimmer); display: flex; align-items: center; gap: 8px; margin-bottom: 28px;
}
.breadcrumb a{ color: var(--text-dim); }
.breadcrumb a:hover{ color: var(--accent); }

.article-head{ padding: 56px 0 40px; border-bottom: 1px solid var(--line); }
.article-meta-top{ display:flex; align-items:center; gap:14px; flex-wrap:wrap; margin-bottom:22px; }
.article-meta-top .eyebrow{ margin-bottom:0; }
.article-meta-top .sep{ color: var(--text-dimmer); }
.article-meta-top span.plain{ font-family: var(--font-mono); font-size:12px; color:var(--text-dimmer); text-transform:uppercase; letter-spacing:.06em; }
.article-title{ font-size: clamp(32px,6vw,58px); font-weight:800; letter-spacing:-.025em; line-height:1.02; max-width:20ch; }
.article-dek{ font-size: clamp(16px,2vw,19px); color: var(--text-dim); max-width:56ch; margin-top:20px; line-height:1.6; }
.article-meta-row{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; margin-top:32px; }
.article-tags{ display:flex; flex-wrap:wrap; gap:8px; }
.article-actions{ display:flex; gap:10px; align-items:center; }
.icon-btn{
  width:38px; height:38px; border:1px solid var(--line-bright); border-radius:50%;
  display:flex; align-items:center; justify-content:center; color:var(--text-dim); background:none;
  transition: border-color .2s, color .2s;
  font-family: var(--font-mono); font-size: 11px;
}
.icon-btn:hover{ border-color: var(--accent); color: var(--accent); }
.icon-btn svg{ width:15px; height:15px; }

.cover-media{ overflow:hidden; margin: 0 0 8px; border-bottom:1px solid var(--line); background: var(--bg-raised-2); display:flex; justify-content:center; }
.cover-media img{ width:100%; height:auto; display:block; }
.cover-caption{ font-family: var(--font-mono); font-size:12px; color:var(--text-dimmer); padding: 10px 0 40px; border-bottom:1px solid var(--line); }

.article-layout{ display:grid; grid-template-columns: 220px 1fr; gap:64px; align-items:start; padding: 56px 0 96px; }
.toc{ position: sticky; top: 100px; }
.toc-label{ font-family: var(--font-mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--text-dimmer); margin-bottom:14px; }
.toc ul{ display:flex; flex-direction:column; gap:2px; border-left: 1px solid var(--line); }
.toc a{
  display:block; font-family: var(--font-mono); font-size:13px; color:var(--text-dimmer); padding:7px 0 7px 16px;
  border-left: 2px solid transparent; margin-left:-1px; transition: color .2s, border-color .2s;
}
.toc a:hover{ color: var(--text); }
.toc a.is-active{ color: var(--accent); border-left-color: var(--accent); }

.prose{ max-width: 68ch; }
.prose h2{ font-size: clamp(22px,3vw,30px); font-weight:800; letter-spacing:-.02em; margin: 56px 0 18px; scroll-margin-top: 100px; }
.prose h2:first-child{ margin-top:0; }
.prose h3{ font-size:19px; font-weight:700; margin: 34px 0 12px; scroll-margin-top:100px; }
.prose p{ font-size:16px; line-height:1.8; color: var(--text-dim); margin-bottom:20px; }
.prose p strong{ color: var(--text); font-weight:600; }
.prose ul, .prose ol{ margin: 0 0 20px; padding-left: 22px; color: var(--text-dim); font-size:16px; line-height:1.8; }
.prose li{ margin-bottom:8px; }
.prose a:not(.btn){ color: var(--accent); text-decoration:underline; text-underline-offset:3px; }
.prose figure{ margin: 32px 0; }
.prose figure img{ width:100%; border:1px solid var(--line); }
.prose figcaption{ font-family: var(--font-mono); font-size:12px; color:var(--text-dimmer); margin-top:10px; }
.prose code{ font-family: var(--font-mono); font-size:.88em; background: var(--bg-raised); padding:2px 6px; border-radius:3px; color: var(--accent-dim); }
.prose pre{ background: var(--bg-raised); border:1px solid var(--line); padding:20px; overflow-x:auto; margin:28px 0; }
.prose pre code{ background:none; padding:0; color: var(--text); }
.prose blockquote{
  border-left: 2px solid var(--accent); margin: 32px 0; padding: 4px 0 4px 24px;
  font-size: 20px; font-weight:600; letter-spacing:-.01em; line-height:1.4; color: var(--text);
}

.stat-strip{ display:grid; grid-template-columns: repeat(3,1fr); border:1px solid var(--line); margin: 36px 0; }
.stat-strip .stat{ padding: 24px; border-right: 1px solid var(--line); }
.stat-strip .stat:last-child{ border-right:none; }
.stat-num{ font-size: clamp(28px,4vw,38px); font-weight:800; color: var(--accent); letter-spacing:-.02em; }
.stat-label{ font-family: var(--font-mono); font-size:11px; text-transform:uppercase; letter-spacing:.08em; color: var(--text-dimmer); margin-top:8px; }

.process-list{ counter-reset: step; margin: 32px 0; border-top:1px solid var(--line); }
.process-item{ counter-increment: step; display:flex; gap:20px; padding:22px 0; border-bottom:1px solid var(--line); }
.process-num{ font-family: var(--font-mono); font-size:13px; color: var(--accent); flex-shrink:0; width:28px; }
.process-num::before{ content: counter(step, decimal-leading-zero); }
.process-body h3{ margin:0 0 6px; font-size:16px; }
.process-body p{ margin:0; font-size:14.5px; color: var(--text-dim); line-height:1.65; }

.accordion{ border-top:1px solid var(--line); margin: 32px 0; }
.accordion-item{ border-bottom: 1px solid var(--line); }
.accordion-trigger{
  width:100%; display:flex; justify-content:space-between; align-items:center; gap:16px;
  background:none; border:none; color: var(--text); text-align:left; padding: 20px 0;
  font-family: var(--font-display); font-size:17px; font-weight:600;
}
.accordion-trigger .idx{ font-family: var(--font-mono); font-size:12px; color: var(--text-dimmer); margin-right:14px; }
.accordion-trigger svg{ width:16px; height:16px; flex-shrink:0; transition: transform .25s var(--ease); color: var(--text-dimmer); }
.accordion-item.is-open .accordion-trigger svg{ transform: rotate(45deg); color: var(--accent); }
.accordion-panel{ max-height:0; overflow:hidden; transition: max-height .3s var(--ease); }
.accordion-panel-inner{ padding: 0 0 24px; font-size:15px; color: var(--text-dim); line-height:1.75; max-width:60ch; }

.tabs{ margin: 32px 0; border:1px solid var(--line); }
.tab-list{ display:flex; border-bottom:1px solid var(--line); overflow-x:auto; }
.tab-btn{
  font-family: var(--font-mono); font-size:12.5px; text-transform:uppercase; letter-spacing:.05em;
  color: var(--text-dimmer); background:none; border:none; padding:16px 22px; white-space:nowrap;
  border-bottom: 2px solid transparent; margin-bottom:-1px;
}
.tab-btn.is-active{ color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel{ display:none; padding: 26px; font-size:15px; color: var(--text-dim); line-height:1.75; }
.tab-panel.is-active{ display:block; }

.demo-panel{ border:1px solid var(--line-bright); background: var(--bg-raised); padding:28px; margin: 36px 0; }
.demo-panel .eyebrow{ margin-bottom:16px; }
.demo-row{ display:flex; align-items:center; gap:18px; margin: 18px 0; }
.demo-row input[type="range"]{
  flex:1; accent-color: var(--accent); height:2px; background: var(--line-bright);
}
.demo-readout{ font-family: var(--font-mono); font-size:14px; color: var(--accent); min-width:70px; text-align:right; }
.demo-bar-track{ height:8px; background: var(--line); margin-top:20px; overflow:hidden; }
.demo-bar-fill{ height:100%; background: var(--accent); width:0%; }
.demo-note{ font-family: var(--font-mono); font-size:12px; color: var(--text-dimmer); margin-top:16px; line-height:1.6; }

.gallery-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap:2px; margin: 32px 0; }
.gallery-grid button{ aspect-ratio:4/3; overflow:hidden; border:none; padding:0; background: var(--bg-raised-2); cursor: zoom-in; }
.gallery-grid img{ width:100%; height:100%; object-fit:cover; transition: transform .3s var(--ease); }
.gallery-grid button:hover img{ transform: scale(1.05); }

.lightbox{
  position:fixed; inset:0; background: rgba(11,12,9,0.94); z-index: 2000;
  display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none;
  transition: opacity .25s var(--ease);
}
.lightbox.is-open{ opacity:1; pointer-events:auto; }
.lightbox img{ max-width: 88vw; max-height: 82vh; border:1px solid var(--line-bright); }
.lightbox-close, .lightbox-prev, .lightbox-next{
  position:absolute; background: var(--bg); border:1px solid var(--line-bright); color: var(--text);
  width:44px; height:44px; border-radius:50%; display:flex; align-items:center; justify-content:center;
}
.lightbox-close{ top:24px; right:24px; }
.lightbox-prev{ left:24px; top:50%; transform:translateY(-50%); }
.lightbox-next{ right:24px; top:50%; transform:translateY(-50%); }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover{ border-color: var(--accent); color: var(--accent); }

.footnotes{ border-top:1px solid var(--line); margin-top:56px; padding-top:28px; }
.footnotes ol{ padding-left:20px; }
.footnotes li{ font-size:13.5px; color: var(--text-dimmer); line-height:1.7; margin-bottom:10px; scroll-margin-top: 100px; }
.footnotes a{ color: var(--accent); }
.fn-ref{ font-family: var(--font-mono); color: var(--accent); text-decoration:none; font-size:.72em; vertical-align:super; margin-left:1px; }
.fn-ref:hover{ text-decoration:underline; }
.fn-highlight{ background: var(--accent-wash); }

.reveal{ opacity:0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-visible{ opacity:1; transform: translateY(0); }

@media (max-width: 900px){
  .article-layout{ grid-template-columns: 1fr; }
  .toc{ position:static; margin-bottom:32px; }
  .toc ul{ display:flex; flex-wrap:wrap; border-left:none; gap:8px; }
  .toc a{ border:1px solid var(--line-bright); padding:6px 12px; border-radius:14px; }
  .toc a.is-active{ background: var(--accent); color:#0B0C09; border-color:var(--accent); }
  .stat-strip{ grid-template-columns:1fr; }
  .stat-strip .stat{ border-right:none; border-bottom:1px solid var(--line); }
  .gallery-grid{ grid-template-columns: repeat(2,1fr); }
}