/* ==========================================================================
   Jacob Chugg — Mechanical Engineering Portfolio
   Design system: dark charcoal shop floor + light "drawing sheet" panels.
   Typography: Space Grotesk (display) / IBM Plex Sans (body) / IBM Plex Mono (labels)
   ========================================================================== */

:root {
  /* Core surfaces */
  --bg: #0c0e10;
  --bg-alt: #131619;
  --surface: #191d21;
  --surface-2: #1e2226;
  --border: #262b30;
  --border-soft: #20242a;

  /* "Drawing sheet" light panels */
  --paper: #f2efe8;
  --paper-2: #eae6db;
  --paper-border: #d6d0c1;
  --ink: #17191c;
  --ink-soft: #52585e;

  /* Text on dark */
  --text: #edebe4;
  --text-soft: #b9bcbf;
  --text-muted: #868c92;

  /* Accent — "blued steel" instrument blue */
  --accent: #6f9fca;
  --accent-strong: #4c82ae;
  --accent-on-paper: #2c5b7d;

  /* Status */
  --amber: #c98a3e;

  /* Type */
  --font-display: "Space Grotesk", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* Layout */
  --container: 1240px;
  --container-narrow: 860px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius-sm: 3px;
  --radius-md: 6px;

  --nav-h: 76px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea { font: inherit; }

::selection { background: var(--accent-strong); color: #fff; }

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

/* ---------- Type scale ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; color: var(--text); }
.on-paper h1, .on-paper h2, .on-paper h3, .on-paper h4 { color: var(--ink); }

.h1 { font-size: clamp(2.4rem, 5.4vw, 4.4rem); line-height: 1.03; letter-spacing: -0.02em; }
.h2 { font-size: clamp(1.9rem, 3.4vw, 2.75rem); line-height: 1.08; }
.h3 { font-size: clamp(1.4rem, 2vw, 1.75rem); line-height: 1.2; }
.h4 { font-size: 1.125rem; line-height: 1.3; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.on-paper .eyebrow { color: var(--accent-on-paper); }
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}
.eyebrow.no-rule::before { content: none; }

.lede {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.6;
  color: var(--text-soft);
  max-width: 62ch;
}
.on-paper .lede { color: var(--ink-soft); }

.mono { font-family: var(--font-mono); }
.text-muted { color: var(--text-muted); }
.on-paper .text-muted { color: var(--ink-soft); }

/* ---------- Layout helpers ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}
.section { padding: clamp(56px, 9vw, 128px) 0; }
.section-tight { padding: clamp(40px, 6vw, 72px) 0; }
.section-head { max-width: 720px; margin-bottom: clamp(28px, 4vw, 52px); }
.section-head .h2 { margin-top: 14px; }

.section-alt { background: var(--bg-alt); }
.section-paper { background: var(--paper); color: var(--ink); }

hr.rule {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* Blueprint grid backdrop */
.blueprint-bg {
  position: relative;
  isolation: isolate;
}
.blueprint-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(237, 235, 228, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(237, 235, 228, 0.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 40%, transparent 90%);
}

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 24px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: #0c0e10; }
.btn-ghost.on-paper { border-color: var(--paper-border); color: var(--ink); }
.btn-ghost.on-paper:hover { border-color: var(--accent-on-paper); color: var(--accent-on-paper); }
.btn svg { width: 14px; height: 14px; flex-shrink: 0; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(12, 14, 16, 0.97);
  border-bottom: 1px solid var(--border-soft);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 30px; height: 30px; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-family: var(--font-display); font-size: 1rem; font-weight: 600; letter-spacing: 0.01em; }
.brand-sub { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.12em; color: var(--text-muted); text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 10px 16px;
  color: var(--text-soft);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
  position: relative;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.is-active { color: var(--accent); }
.nav-links a.is-active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 6px;
  height: 1px;
  background: var(--accent);
}

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: ""; display: block; width: 18px; height: 1.5px; background: var(--text);
  position: relative; transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle::before { transform: translateY(-6px); }
.nav-toggle::after { transform: translateY(5px); }
.nav-toggle.is-open span { opacity: 0; }
.nav-toggle.is-open::before { transform: translateY(0) rotate(45deg); }
.nav-toggle.is-open::after { transform: translateY(-1.5px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0; bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    padding: 12px var(--gutter) 40px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    overflow-y: auto;
  }
  .nav-links.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { font-size: 1rem; padding: 18px 4px; border-bottom: 1px solid var(--border-soft); }
  .nav-links a.is-active::after { display: none; }
  .nav-toggle { display: flex; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border-soft);
  background: var(--bg-alt);
  padding: clamp(48px, 7vw, 80px) 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-col h4 { font-size: 0.78rem; font-family: var(--font-mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 16px; }
.footer-col a, .footer-col p { color: var(--text-soft); font-size: 0.95rem; }
.footer-col li { margin-bottom: 10px; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;
  padding-top: 24px; border-top: 1px solid var(--border-soft);
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.03em;
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

/* ==========================================================================
   HOME — Hero
   ========================================================================== */
.hero {
  position: relative;
  padding-top: calc(var(--nav-h) + clamp(56px, 10vw, 120px));
  padding-bottom: clamp(56px, 8vw, 96px);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}
.hero-copy .eyebrow { margin-bottom: 22px; }
.hero-copy h1 { margin-bottom: 18px; }
.hero-copy .role-line {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-soft);
  margin-bottom: 26px;
}
.hero-copy .role-line strong { color: var(--text); font-weight: 500; }
.hero-copy p.lede { margin-bottom: 34px; }

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 3.1;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: linear-gradient(160deg, #14171a, #0c0e10);
  overflow: hidden;
}
.hero-visual img {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0.92;
  filter: saturate(0.85) contrast(1.02);
}
.hero-visual .corner-tick { position: absolute; width: 16px; height: 16px; opacity: 0.5; }
.hero-visual .ct-tl { top: 12px; left: 12px; border-top: 1px solid var(--text); border-left: 1px solid var(--text); }
.hero-visual .ct-br { bottom: 12px; right: 12px; border-bottom: 1px solid var(--text); border-right: 1px solid var(--text); }
.hero-visual .tag {
  position: absolute; left: 16px; bottom: 16px;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-soft); background: rgba(12,14,16,0.65); padding: 6px 10px; border-radius: 2px;
  backdrop-filter: blur(4px);
}

.hero-stats {
  display: flex; gap: 32px; flex-wrap: wrap;
  margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--border-soft);
}
.hero-stat .num { font-family: var(--font-display); font-size: 1.6rem; font-weight: 600; }
.hero-stat .label { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); margin-top: 4px; }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; aspect-ratio: 16/10; }
}

/* ==========================================================================
   Project cards (home + index)
   ========================================================================== */
.work-list { display: flex; flex-direction: column; gap: 1px; background: var(--border-soft); }
.work-item {
  background: var(--bg);
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: clamp(20px, 4vw, 48px);
  padding: clamp(28px, 4vw, 48px) 0;
  align-items: center;
}
.work-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}
.work-num .ring {
  width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 0.95rem; color: var(--text-soft);
  transition: border-color 0.25s ease, color 0.25s ease;
}
.work-item:hover .work-num .ring { border-color: var(--accent); color: var(--accent); }

.work-body { display: grid; grid-template-columns: 1.1fr 1.3fr; gap: clamp(24px, 3vw, 48px); align-items: center; }
.work-media {
  aspect-ratio: 16/11;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--paper);
}
.work-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.work-item:hover .work-media img { transform: scale(1.035); }

.work-type { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.09em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.work-title { font-family: var(--font-display); font-size: clamp(1.4rem, 2.4vw, 1.9rem); font-weight: 600; margin-bottom: 12px; letter-spacing: -0.01em; }
.work-desc { color: var(--text-soft); font-size: 0.98rem; line-height: 1.55; max-width: 46ch; margin-bottom: 18px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tag {
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.03em;
  color: var(--text-muted); border: 1px solid var(--border); border-radius: 20px;
  padding: 5px 11px;
}
.on-paper .tag { border-color: var(--paper-border); color: var(--ink-soft); }
.work-link { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text); display: inline-flex; align-items: center; gap: 8px; }
.work-link svg { width: 13px; height: 13px; transition: transform 0.2s ease; }
.work-item:hover .work-link svg { transform: translateX(3px); }
.work-item:hover .work-link { color: var(--accent); }

@media (max-width: 760px) {
  .work-item { grid-template-columns: 1fr; }
  .work-body { grid-template-columns: 1fr; }
  .work-num { margin-bottom: 4px; }
}

/* Secondary project (Pipsqueak) band */
.secondary-project {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.secondary-media { aspect-ratio: 4/3; overflow: hidden; background: var(--paper); }
.secondary-media img { width: 100%; height: 100%; object-fit: cover; }
.secondary-copy { padding: clamp(24px, 3vw, 20px) clamp(24px, 3vw, 8px) clamp(24px, 3vw, 20px) 0; }
@media (max-width: 760px) {
  .secondary-project { grid-template-columns: 1fr; }
  .secondary-copy { padding: 0 24px 28px; }
}

/* ==========================================================================
   Gallery
   ========================================================================== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-soft);
}
.gallery-card { background: var(--bg); padding: clamp(20px, 3vw, 32px); }
.gallery-media {
  aspect-ratio: 4/3;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--border);
  margin-bottom: 18px;
  position: relative;
}
.gallery-media img {
  width: 100%; height: 100%; object-fit: cover;
  position: absolute; inset: 0;
  transition: opacity 0.5s ease;
}
.gallery-media img.img-b { opacity: 0; }
.gallery-media:hover img.img-b { opacity: 1; }
.gallery-title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.gallery-desc { color: var(--text-soft); font-size: 0.92rem; line-height: 1.5; margin-bottom: 14px; max-width: 42ch; }

@media (max-width: 700px) {
  .gallery-grid { grid-template-columns: 1fr; }
}

.gallery-preview-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.gallery-preview-strip a {
  display: block; aspect-ratio: 1/1; border-radius: var(--radius-md);
  overflow: hidden; border: 1px solid var(--border); background: var(--paper);
  position: relative;
}
.gallery-preview-strip img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.gallery-preview-strip a:hover img { transform: scale(1.06); }
.gallery-preview-strip .label {
  position: absolute; left: 0; right: 0; bottom: 0;
  background: linear-gradient(to top, rgba(12,14,16,0.82), transparent);
  color: #fff; font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.05em;
  text-transform: uppercase; padding: 22px 10px 8px;
}
@media (max-width: 700px) {
  .gallery-preview-strip { grid-template-columns: repeat(2, 1fr); }
}

/* ==========================================================================
   Case study pages
   ========================================================================== */
.cs-hero {
  padding-top: calc(var(--nav-h) + 56px);
  padding-bottom: 48px;
}
.cs-hero .eyebrow { margin-bottom: 20px; }
.cs-hero h1 { margin-bottom: 16px; max-width: 16ch; }
.cs-hero .lede { margin-bottom: 0; }

/* Title-block style meta bar, echoing the drawing sheets' own title blocks */
.title-block {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 40px;
}
.title-block dl { margin: 0; padding: 16px 20px; border-left: 1px solid var(--border); }
.title-block dl:first-child { border-left: none; }
.title-block dt {
  font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-muted); margin-bottom: 6px;
}
.title-block dd { margin: 0; font-size: 0.9rem; color: var(--text); line-height: 1.4; }
@media (max-width: 760px) {
  .title-block { grid-template-columns: repeat(2, 1fr); }
  .title-block dl:nth-child(3) { border-left: none; }
  .title-block dl:nth-child(3), .title-block dl:nth-child(4) { border-top: 1px solid var(--border); }
}

.cs-hero-media {
  margin-top: 48px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--paper);
}
.cs-hero-media img { width: 100%; height: auto; display: block; }

/* Story sections: alternating image/text */
.story-section { padding: clamp(48px, 7vw, 96px) 0; }
.story-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}
.story-row.reverse .story-media { order: 2; }
.story-step {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent); letter-spacing: 0.1em;
  margin-bottom: 14px; text-transform: uppercase;
}
.story-row h3 { margin-bottom: 16px; }
.story-row p { color: var(--text-soft); line-height: 1.7; margin-bottom: 14px; }
.story-row p:last-child { margin-bottom: 0; }
.story-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--paper);
}
.story-media img { width: 100%; height: 100%; object-fit: contain; display: block; }
.story-media.pad { padding: 20px; }
.story-media figcaption {
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-soft);
  padding: 12px 16px; border-top: 1px solid var(--paper-border); background: var(--paper-2);
}
@media (max-width: 820px) {
  .story-row, .story-row.reverse { grid-template-columns: 1fr; }
  .story-row.reverse .story-media { order: 0; }
}

.story-divider { height: 1px; background: var(--border-soft); }

/* Drawing gallery / lightbox trigger grid */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.doc-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper);
  text-align: left;
  display: block;
  width: 100%;
}
.doc-card .doc-thumb { aspect-ratio: 4/3; overflow: hidden; background: var(--paper); position: relative; }
.doc-card img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.35s ease; }
.doc-card:hover img { transform: scale(1.04); }
.doc-card .doc-label {
  padding: 12px 16px;
  border-top: 1px solid var(--paper-border);
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink); letter-spacing: 0.02em;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  background: var(--paper-2);
}
.doc-card .doc-label svg { width: 14px; height: 14px; opacity: 0.55; flex-shrink: 0; }
@media (max-width: 760px) {
  .doc-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .doc-grid { grid-template-columns: 1fr; }
}

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(8, 9, 11, 0.92);
  display: none;
  align-items: center; justify-content: center;
  padding: 40px clamp(16px, 5vw, 64px);
}
.lightbox.is-open { display: flex; }
.lightbox-inner { max-width: 1200px; width: 100%; max-height: 88vh; }
.lightbox-frame {
  background: var(--paper);
  border-radius: var(--radius-md);
  overflow: hidden;
  max-height: 80vh;
  display: flex; align-items: center; justify-content: center;
}
.lightbox-frame img { max-height: 80vh; width: auto; max-width: 100%; object-fit: contain; }
.lightbox-caption {
  margin-top: 14px; display: flex; justify-content: space-between; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-soft);
}
.lightbox-close {
  position: fixed; top: 24px; right: clamp(16px, 4vw, 40px);
  width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; color: var(--text);
}
.lightbox-close:hover { border-color: var(--accent); color: var(--accent); }
.lightbox-close svg { width: 16px; height: 16px; }

/* Placeholder / future-media card */
.placeholder-card {
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  padding: clamp(32px, 5vw, 56px);
  text-align: center;
  color: var(--text-muted);
}
.placeholder-card .ph-icon { width: 34px; height: 34px; margin: 0 auto 18px; opacity: 0.6; }
.placeholder-card h4 { color: var(--text-soft); margin-bottom: 10px; }
.placeholder-card p { font-size: 0.92rem; max-width: 46ch; margin: 0 auto; line-height: 1.6; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--amber); border: 1px solid rgba(201,138,62,0.4); background: rgba(201,138,62,0.08);
  padding: 6px 12px; border-radius: 20px;
}
.status-pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--amber); }

/* Media grid for photo sets (Pipsqueak / Robot) */
.photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.photo-grid img, .photo-grid .ph-item {
  border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border);
  aspect-ratio: 4/3; object-fit: cover; width: 100%; height: 100%;
}
@media (max-width: 700px) { .photo-grid { grid-template-columns: repeat(2, 1fr); } }

/* Video */
.video-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.video-card {
  border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; background: var(--surface);
}
.video-card .video-wrap { position: relative; aspect-ratio: 9/16; background: #000; max-height: 560px; margin: 0 auto; }
.video-card video { width: 100%; height: 100%; object-fit: contain; background: #000; }
.video-caption { padding: 14px 18px; font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-muted); }
.play-btn {
  position: absolute; inset: 0; margin: auto; width: 62px; height: 62px; border-radius: 50%;
  background: rgba(237,235,228,0.92); display: flex; align-items: center; justify-content: center;
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.play-btn:hover { transform: scale(1.06); background: #fff; }
.play-btn svg { width: 20px; height: 20px; margin-left: 3px; color: var(--bg); }
.video-wrap.is-playing .play-btn { display: none; }
@media (max-width: 760px) { .video-row { grid-template-columns: 1fr; } }

/* System diagram (robot) */
.diagram-wrap {
  border: 1px solid var(--border); border-radius: var(--radius-md);
  background: var(--paper); padding: clamp(20px, 4vw, 44px);
  overflow-x: auto;
}
.diagram-wrap svg { display: block; margin: 0 auto; min-width: 560px; width: 100%; height: auto; max-width: 760px; }
.diagram-node rect { fill: #fff; stroke: var(--paper-border); stroke-width: 1.4; }
.diagram-node.controller rect { fill: var(--ink); stroke: var(--ink); }
.diagram-node text { font-family: var(--font-mono); font-size: 12.5px; fill: var(--ink); }
.diagram-node.controller text { fill: var(--paper); }
.diagram-line { stroke: #a7a196; stroke-width: 1.4; fill: none; }
.diagram-label { font-family: var(--font-mono); font-size: 10px; fill: var(--ink-soft); }

/* Next project nav */
.next-project {
  border-top: 1px solid var(--border-soft);
  padding: clamp(40px, 6vw, 64px) 0;
}
.next-project a { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.next-project .np-label { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 8px; }
.next-project .np-title { font-family: var(--font-display); font-size: clamp(1.3rem, 2.6vw, 2rem); font-weight: 600; }
.next-project svg { width: 22px; height: 22px; flex-shrink: 0; transition: transform 0.2s ease; }
.next-project a:hover svg { transform: translateX(6px); }
.next-project a:hover .np-title { color: var(--accent); }

/* ==========================================================================
   About page
   ========================================================================== */
.about-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(32px, 5vw, 72px); align-items: start; }
.about-media { border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; background: var(--paper); position: sticky; top: calc(var(--nav-h) + 24px); }
.about-media img { width: 100%; height: auto; }
.about-copy p { color: var(--text-soft); line-height: 1.75; margin-bottom: 20px; font-size: 1.02rem; }
.about-copy h3 { margin: 36px 0 14px; }
.fact-list { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 24px; margin-top: 12px; }
.fact-list div { border-top: 1px solid var(--border-soft); padding-top: 12px; }
.fact-list dt { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 6px; }
.fact-list dd { margin: 0; font-size: 0.95rem; }
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-media { position: static; max-width: 360px; }
}

/* ==========================================================================
   Resume page
   ========================================================================== */
.resume-layout { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(32px, 5vw, 64px); align-items: start; }
.resume-preview {
  border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; background: var(--paper);
}
.resume-preview img { width: 100%; height: auto; display: block; }
.resume-copy h2 { margin-bottom: 18px; }
.resume-copy p { color: var(--text-soft); line-height: 1.7; margin-bottom: 24px; }
.resume-highlights { display: flex; flex-direction: column; gap: 0; margin: 28px 0 32px; border-top: 1px solid var(--border-soft); }
.resume-highlights .rh-item { display: grid; grid-template-columns: 90px 1fr; gap: 18px; padding: 16px 0; border-bottom: 1px solid var(--border-soft); }
.resume-highlights .rh-label { font-family: var(--font-mono); font-size: 0.7rem; color: var(--text-muted); letter-spacing: 0.06em; text-transform: uppercase; padding-top: 2px; }
.resume-highlights .rh-value { font-size: 0.95rem; color: var(--text); line-height: 1.5; }
@media (max-width: 800px) { .resume-layout { grid-template-columns: 1fr; } .resume-preview { max-width: 420px; margin: 0 auto; } }

/* ==========================================================================
   Contact page
   ========================================================================== */
.contact-hero { padding-top: calc(var(--nav-h) + 80px); }
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 48px; }
.contact-card {
  border: 1px solid var(--border); border-radius: var(--radius-md); padding: 32px;
  display: flex; flex-direction: column; gap: 16px; transition: border-color 0.2s ease, transform 0.2s ease;
}
.contact-card:hover { border-color: var(--accent); transform: translateY(-2px); }
.contact-card .cc-icon { width: 30px; height: 30px; color: var(--accent); }
.contact-card h3 { font-size: 1.1rem; }
.contact-card p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }
.contact-card .cc-value { font-family: var(--font-mono); font-size: 0.95rem; color: var(--text); word-break: break-word; }
@media (max-width: 700px) { .contact-grid { grid-template-columns: 1fr; } }

/* ==========================================================================
   Projects index (case-study listing)
   ========================================================================== */
.index-hero { padding-top: calc(var(--nav-h) + 64px); padding-bottom: 8px; }

/* Utility */
.mt-0 { margin-top: 0; }
.center { text-align: center; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 400;
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 4px;
  font-family: var(--font-mono); font-size: 0.8rem; transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }