/* nvidhu.com: robotics HUD, light by default, dark on toggle. */

:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --ink: #0b1220;
  --ink-2: #4a5563;
  --ink-3: #5f6b7a;
  --line: #dde2ea;
  --line-strong: #c5ccd7;
  --accent: #0e7490;          /* text-safe cyan (5:1 on bg) */
  --accent-deco: #06b6d4;     /* decorative lines only */
  --accent-soft: rgba(6, 182, 212, 0.10);
  --accent-2: #be185d;        /* magenta */
  --accent-2-soft: rgba(190, 24, 93, 0.08);
  --grid: rgba(14, 116, 144, 0.07);
  --plate: #ffffff;
  --shadow: 0 1px 2px rgba(11, 18, 32, 0.04), 0 8px 24px -12px rgba(11, 18, 32, 0.12);
  --glow: none;
  --on-accent: #ffffff;

  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius: 4px;
  --gutter: 24px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #0a0e14;
  --surface: #111823;
  --surface-2: #0d131c;
  --ink: #e6edf3;
  --ink-2: #b3bfcc;
  --ink-3: #8b97a6;
  --line: #1e2a38;
  --line-strong: #2b3a4c;
  --accent: #22d3ee;
  --accent-deco: #22d3ee;
  --accent-soft: rgba(34, 211, 238, 0.10);
  --accent-2: #f472b6;
  --accent-2-soft: rgba(244, 114, 182, 0.10);
  --grid: rgba(34, 211, 238, 0.055);
  --plate: #e9eef4;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 32px -16px rgba(0, 0, 0, 0.6);
  --glow: 0 0 14px rgba(34, 211, 238, 0.35);
  --on-accent: #0a0e14;
  color-scheme: dark;
}

/* ------------------------------------------------------------------ base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.65 var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .25s ease, color .25s ease;
}
/* Blueprint grid, strongest near the top of the page. */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 35%, transparent 85%);
          mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 35%, transparent 85%);
}
img, video, svg { display: block; max-width: 100%; }
img, video { height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
b, strong { font-weight: 600; color: var(--ink); }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; margin: 0; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--accent); color: var(--on-accent); }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 var(--gutter); }
.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--surface); padding: 8px 12px; border: 1px solid var(--line); }
.skip-link:focus { left: 8px; }
.mono { font-family: var(--font-mono); }
.muted { color: var(--ink-3); }

/* ------------------------------------------------------------ primitives */
.kicker {
  font: 500 12px/1.4 var(--font-mono);
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
  display: flex; align-items: center; gap: 10px;
}
.led {
  width: 8px; height: 8px; border-radius: 50%;
  background: #10b981; box-shadow: 0 0 0 3px rgba(16, 185, 129, .18);
  animation: pulse 2.4s ease-in-out infinite;
  flex: none;
}
@keyframes pulse { 50% { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); } }
.cursor { color: var(--accent); animation: blink 1.1s steps(1) infinite; margin-left: 2px; font-weight: 400; }
@keyframes blink { 50% { opacity: 0; } }

/* Corner brackets drawn with one pseudo-element (8 gradient strokes). */
.hud { position: relative; }
.hud::after {
  --c: var(--accent-deco); --l: 14px; --t: 2px;
  content: ""; position: absolute; inset: -6px; pointer-events: none;
  background:
    linear-gradient(var(--c), var(--c)) top left / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) top left / var(--t) var(--l),
    linear-gradient(var(--c), var(--c)) top right / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) top right / var(--t) var(--l),
    linear-gradient(var(--c), var(--c)) bottom left / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) bottom left / var(--t) var(--l),
    linear-gradient(var(--c), var(--c)) bottom right / var(--l) var(--t),
    linear-gradient(var(--c), var(--c)) bottom right / var(--t) var(--l);
  background-repeat: no-repeat;
  opacity: .9;
  filter: drop-shadow(var(--glow));
}
[data-theme="dark"] .hud::after { filter: drop-shadow(0 0 4px rgba(34, 211, 238, .6)); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 44px; padding: 0 18px;
  font: 500 14px/1 var(--font-mono); letter-spacing: .02em;
  border-radius: var(--radius); border: 1px solid transparent;
  cursor: pointer; white-space: nowrap;
  transition: background-color .15s, border-color .15s, color .15s, box-shadow .15s, transform .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.btn svg.fill { fill: currentColor; stroke: none; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { box-shadow: 0 6px 18px -6px var(--accent), var(--glow); }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { height: 36px; padding: 0 14px; font-size: 13px; }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px; padding: 0;
  background: transparent; color: var(--ink);
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  cursor: pointer;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.chip {
  display: inline-block;
  font: 500 11px/1 var(--font-mono); letter-spacing: .08em; text-transform: uppercase;
  padding: 6px 8px; border-radius: 2px;
  border: 1px solid var(--line-strong); color: var(--ink-2);
}
.chip-acc { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.chip-acc2 { border-color: var(--accent-2); color: var(--accent-2); background: var(--accent-2-soft); }
.tag-line { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0 0; }
.tags span {
  font: 400 12px/1 var(--font-mono);
  padding: 6px 8px; border-radius: 2px;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--ink-2);
}

.text-link { font: 500 14px/1.4 var(--font-mono); color: var(--accent); }

/* ---------------------------------------------------------------- topbar */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
          backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font: 500 15px/1 var(--font-mono); }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px;
  border: 1.5px solid var(--accent); color: var(--accent);
  font: 700 13px/1 var(--font-mono); letter-spacing: .04em;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  font: 500 13px/1 var(--font-mono); letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-2); padding: 10px 12px; border-radius: var(--radius);
}
.nav a:hover { color: var(--ink); background: var(--accent-soft); text-decoration: none; }
.nav a.active { color: var(--accent); }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.menu-btn { display: none; }
.i-sun { display: none !important; }
[data-theme="dark"] .i-sun { display: block !important; }
[data-theme="dark"] .i-moon { display: none !important; }

/* ------------------------------------------------------------------ hero */
.hero { padding: 72px 0 24px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(2.6rem, 6.2vw, 4.6rem); font-weight: 700; letter-spacing: -0.03em; }
.role {
  font: 500 clamp(0.95rem, 1.8vw, 1.15rem)/1.4 var(--font-mono);
  color: var(--ink); margin: 14px 0 22px;
}
.role .sep { color: var(--accent-2); margin: 0 6px; }
.lead { font-size: 1.12rem; color: var(--ink-2); max-width: 60ch; }
.cta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.hero-photo { margin: 0; justify-self: end; width: 100%; max-width: 420px; }
.hero-photo img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius); background: var(--surface-2); }
.coord {
  position: absolute; left: 12px; bottom: 12px;
  font: 500 11px/1 var(--font-mono); letter-spacing: .08em;
  color: #e6edf3; background: rgba(10, 14, 20, .62); padding: 6px 8px; border-radius: 2px;
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}

/* Affiliations strip */
.affil {
  margin-top: 56px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.affil-group { padding: 20px 24px; }
.affil-group + .affil-group { border-left: 1px solid var(--line); }
.affil-label { font: 500 11px/1 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; }
.affil ul { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr; gap: 14px; }
.affil li { display: flex; align-items: center; gap: 14px; min-width: 0; }
.affil li > span:last-child { display: flex; flex-direction: column; min-width: 0; }
.affil b { font: 600 15px/1.35 var(--font-body); }
.affil small { font: 400 12.5px/1.5 var(--font-mono); color: var(--ink-3); }
.nw { white-space: nowrap; }
.logo-plate {
  flex: none; display: grid; place-items: center;
  width: 124px; height: 72px; padding: 8px;
  background: var(--plate); border: 1px solid var(--line); border-radius: var(--radius);
}
.logo-plate img { max-height: 56px; max-width: 100%; width: auto; }


/* -------------------------------------------------------------- sections */
.section { padding: 96px 0 0; }
.section-head { margin-bottom: 36px; }
.section-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); font-weight: 600; }

.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); display: flex; flex-direction: column; min-width: 0;
}
.card-body { padding: 22px 24px 24px; }
.card h3 { font-size: 1.3rem; font-weight: 600; margin-bottom: 10px; }
.card p { color: var(--ink-2); }
.card .media { margin: 14px 14px 0; }

/* Featured */
.featured-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 28px; align-items: stretch; }
/* Equal-height cards: body fills the card and the link sits on the bottom edge */
.feature .card-body { display: flex; flex-direction: column; flex: 1; }
.feature .card-body > .text-link { margin-top: auto; padding-top: 8px; }
.yt {
  position: relative; display: block; width: 100%; aspect-ratio: 16 / 9; padding: 0; border: 0;
  background: #000; cursor: pointer; overflow: hidden; border-radius: 2px;
}
.yt img { width: 100%; height: 100%; object-fit: cover; opacity: .92; transition: transform .4s ease, opacity .2s; }
.yt:hover img { transform: scale(1.03); opacity: 1; }
.yt-play {
  position: absolute; inset: 0; margin: auto; width: 76px; height: 54px; display: grid; place-items: center;
  background: rgba(10, 14, 20, .78); border: 1.5px solid #22d3ee; border-radius: 4px;
  box-shadow: 0 0 20px rgba(34, 211, 238, .45);
}
.yt-play svg { width: 26px; height: 26px; fill: #22d3ee; }
.yt iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.press-link { display: block; background: #fff; border-radius: 2px; overflow: hidden; }
.press-link img { width: 100%; height: auto; transition: transform .4s ease; }
.press-link:hover img { transform: scale(1.015); }

/* Case studies */
.case { padding: 40px 0 56px; border-top: 1px solid var(--line); }
.case:first-of-type { border-top: 0; padding-top: 0; }
.case-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 48px; align-items: start; }
.meta {
  font: 500 12.5px/1.7 var(--font-mono); color: var(--ink-3); letter-spacing: .02em; margin-bottom: 14px;
}
.meta-logo { display: inline-block; vertical-align: -5px; margin-right: 10px; height: 22px; width: auto; filter: grayscale(1); opacity: .75; }
[data-theme="dark"] .meta-logo { filter: grayscale(1) invert(1) brightness(1.4); }
.case h3 { font-size: clamp(1.5rem, 2.6vw, 1.95rem); font-weight: 600; margin-bottom: 14px; }
.case h4 { font: 600 1.02rem/1.35 var(--font-display); margin: 22px 0 10px; color: var(--ink); }
.case-lead { font-size: 1.05rem; color: var(--ink-2); }
.stats { list-style: none; padding: 0; margin: 20px 0; display: flex; flex-wrap: wrap; gap: 10px; }
.stats li {
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px 14px; min-width: 120px;
  border: 1px solid var(--line); border-left: 2px solid var(--accent-deco);
  background: var(--surface); border-radius: 2px;
  font: 400 12px/1.3 var(--font-mono); color: var(--ink-3);
}
.stats b { font: 600 1.2rem/1.2 var(--font-display); color: var(--ink); }
.bullets { margin: 0; padding: 0; list-style: none; }
.bullets li { position: relative; padding-left: 22px; margin-bottom: 10px; color: var(--ink-2); }
.bullets li::before {
  content: ""; position: absolute; left: 2px; top: .68em; width: 8px; height: 8px;
  border: 1.5px solid var(--accent-deco); transform: rotate(45deg);
}
.links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 18px; }
.status-note { display: inline-flex; align-items: center; gap: 8px; font: 500 12px/1 var(--font-mono); color: var(--ink-3); margin-top: 18px; text-transform: uppercase; letter-spacing: .1em; }

.case-media { display: grid; gap: 28px; }
.case-media figure { margin: 0; }
.case-media img, .case-media video { width: 100%; border-radius: 2px; background: var(--surface-2); }
figcaption { font: 400 12.5px/1.5 var(--font-mono); color: var(--ink-3); margin-top: 10px; }
.jlr-media figure.portrait video { aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 55%; }

/* Diagrams */
.diagram {
  margin: 40px 0 0; padding: 20px 22px 22px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
}
.diagram > figcaption {
  margin: 0 0 16px; font: 600 1.05rem/1.3 var(--font-display); color: var(--ink);
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 14px;
}
.diagram > figcaption .kicker { margin: 0; }
.diagram > figcaption small { font: 400 12px/1 var(--font-mono); color: var(--ink-3); }
.diagram-scroll { overflow-x: auto; overflow-y: hidden; -webkit-overflow-scrolling: touch; }
.diagram svg { width: 100%; min-width: 760px; height: auto; font-family: var(--font-mono); }
.diagram text { fill: var(--ink); font-size: 13.5px; font-weight: 500; }
.diagram .sub { fill: var(--ink-3); font-size: 11.5px; font-weight: 400; }
.diagram .wl { fill: var(--ink-3); font-size: 11px; font-weight: 400; }
.diagram .lanes text { fill: var(--ink-3); font-size: 10.5px; letter-spacing: .14em; font-weight: 500; }
.diagram .lanes line { stroke: var(--line); stroke-dasharray: 2 5; }
.diagram .blk rect { fill: var(--surface-2); stroke: var(--line-strong); stroke-width: 1.2; }
.diagram .blk.acc rect { fill: var(--accent-soft); stroke: var(--accent-deco); stroke-width: 1.6; }
.diagram .blk.acc2 rect { fill: var(--accent-2-soft); stroke: var(--accent-2); stroke-width: 1.4; }
.diagram .blk.out rect { fill: var(--surface); stroke: var(--ink-2); stroke-dasharray: 4 3; }
.diagram .blk.dist rect { fill: none; stroke: var(--ink-3); stroke-dasharray: 3 3; }
.diagram .blk.acc text:not(.sub) { fill: var(--accent); }
.diagram .result text { fill: var(--accent); font: 600 22px var(--font-display); }
.diagram .result .sub { fill: var(--ink-3); font: 400 11.5px var(--font-mono); }
.diagram .tiers text { fill: var(--accent-2); font-size: 11.5px; }
.diagram .wire { fill: none; stroke: var(--ink-3); stroke-width: 1.4; marker-end: url(#arr); }
.diagram .wire.acc { stroke: var(--accent-deco); stroke-width: 1.8; marker-end: url(#arr-acc); }
.diagram .wire.acc2 { stroke: var(--accent-2); marker-end: url(#arr-acc2); }
.diagram .wire.dash { stroke-dasharray: 5 4; }
.m { fill: var(--ink-3); }
.m-acc { fill: var(--accent-deco); }
.m-acc2 { fill: var(--accent-2); }
[data-theme="dark"] .diagram .blk.acc rect { filter: drop-shadow(0 0 6px rgba(34, 211, 238, .35)); }

/* Full-width video in the diagram frame */
.demo video { width: 100%; border-radius: 2px; background: #111316; }
.demo-note { margin: 12px 0 0; font: 400 12.5px/1.5 var(--font-mono); color: var(--ink-3); }
.demo .bullets { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 36px; margin-top: 18px; }

/* Smaller project cards */
.mini-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; margin-top: 12px; }
.mini .media { margin: 14px 14px 0; }
.mini .media video, .mini .media img { width: 100%; border-radius: 2px; }
.mini .media video { aspect-ratio: 4 / 3; object-fit: cover; background: #1b2a44; }
.media.paper { background: #fff; border: 1px solid var(--line); border-radius: 2px; display: grid; place-items: center; padding: 16px; }
.media.paper img { width: 100%; max-width: 460px; }
.mini .card-body { display: flex; flex-direction: column; flex: 1; }
.mini .card-body .text-link { margin-top: auto; padding-top: 16px; }
.mini .tags { margin-top: 4px; }

/* Collage */
.collage { list-style: none; margin: 0; padding: 0; columns: 3 300px; column-gap: 18px; }
.collage li { break-inside: avoid; margin-bottom: 18px; }
.tile {
  position: relative; display: block; width: 100%; padding: 0; border: 1px solid var(--line);
  background: var(--surface-2); border-radius: var(--radius); overflow: hidden; cursor: zoom-in;
  color: inherit; text-align: left;
}
.tile img { width: 100%; height: auto; transition: transform .45s ease, filter .3s; }
.tile.portrait img { aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 60%; }
.tile.paper { background: #fff; padding: 18px; }
.tile:hover img { transform: scale(1.035); }
.tile-cap {
  position: absolute; left: 10px; bottom: 10px;
  font: 500 11.5px/1 var(--font-mono); letter-spacing: .06em; text-transform: uppercase;
  color: #e6edf3; background: rgba(10, 14, 20, .7); padding: 7px 9px; border-radius: 2px;
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
}
.tile-play {
  position: absolute; top: 10px; right: 10px; width: 34px; height: 34px; display: grid; place-items: center;
  background: rgba(10, 14, 20, .7); border: 1px solid #22d3ee; border-radius: 2px;
}
.tile-play svg { width: 16px; height: 16px; fill: #22d3ee; }
.tile::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: repeating-linear-gradient(0deg, rgba(34, 211, 238, .06) 0 1px, transparent 1px 3px);
  box-shadow: inset 0 0 0 1px var(--accent-deco);
}
.tile:hover::after, .tile:focus-visible::after { opacity: 1; }

/* About */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 56px; align-items: start; }
.about-copy > p { font-size: 1.08rem; color: var(--ink-2); max-width: 62ch; }
.sub-h { font: 500 12px/1.4 var(--font-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin: 36px 0 14px; }
.about-side .sub-h:first-child, .skills .sub-h { margin-top: 0; }
.edu { display: grid; gap: 14px; }
.edu-item { padding: 16px 18px; background: var(--surface); border: 1px solid var(--line); border-left: 2px solid var(--accent-deco); border-radius: 2px; }
.edu-item p { margin: 0 0 4px; color: var(--ink-2); font-size: .95rem; }
.edu-item p.muted { color: var(--ink-3); font-size: .88rem; margin: 6px 0 0; }
.edu-top { display: flex; justify-content: space-between; gap: 12px; }
.edu-top span { font: 400 12.5px/1.6 var(--font-mono); color: var(--ink-3); white-space: nowrap; }
.skills, .pubs { padding: 22px 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.pubs { margin-top: 24px; }
.skill-group + .skill-group { margin-top: 16px; }
.skill-group > p:first-child { font: 600 .92rem/1.3 var(--font-display); margin: 0; }
.skill-group .tags { margin-top: 8px; }
.pubs ol { margin: 0 0 14px; padding-left: 20px; }
.pubs li { margin-bottom: 12px; color: var(--ink-3); }
.pubs li::marker { font: 500 12px var(--font-mono); color: var(--accent); }
.pubs li a { display: block; font-weight: 500; line-height: 1.4; }
.pubs li span { display: block; font-size: .85rem; line-height: 1.5; margin-top: 3px; }

/* Contact */
.contact { padding-bottom: 96px; }
.contact-panel {
  padding: 48px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow);
  background-image: radial-gradient(ellipse 60% 120% at 100% 0%, var(--accent-soft), transparent 70%);
}
.contact-panel h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 600; margin-bottom: 12px; }
.contact-panel > p:not(.kicker) { color: var(--ink-2); max-width: 60ch; font-size: 1.05rem; }

.footer { border-top: 1px solid var(--line); padding: 24px 0 32px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer p { margin: 0; font: 400 12.5px/1.5 var(--font-mono); color: var(--ink-3); }

/* Lightbox */
.lightbox {
  width: min(1200px, 94vw); max-height: 92vh; padding: 0; border: 1px solid var(--line-strong);
  background: var(--surface); color: var(--ink); border-radius: var(--radius); overflow: visible;
}
.lightbox::backdrop { background: rgba(5, 8, 12, .82); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
.lb-figure { margin: 0; padding: 14px; }
.lb-media { display: grid; place-items: center; }
.lb-media img, .lb-media video { max-width: 100%; max-height: calc(92vh - 90px); width: auto; height: auto; border-radius: 2px; }
/* Line drawings (SVG) have no intrinsic backdrop and a small natural size */
.lb-media img[src$=".svg"] { background: #fff; padding: 16px; height: min(calc(92vh - 90px), 760px); width: auto; }
.lb-caption { text-align: center; margin: 10px 48px 0; }
.lb-close, .lb-nav { position: absolute; z-index: 2; background: color-mix(in srgb, var(--surface) 88%, transparent); }
.lb-close { top: 10px; right: 10px; }
.lb-nav { top: 50%; transform: translateY(-50%); }
.lb-prev { left: 10px; }
.lb-next { right: 10px; }

/* Scroll reveal (JS adds .in; without JS everything is visible). */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* ------------------------------------------------------------ responsive */
@media (max-width: 1040px) {
  .affil { grid-template-columns: 1fr; }
  .affil-group + .affil-group { border-left: 0; border-top: 1px solid var(--line); }
}
@media (max-width: 900px) {
  .hero { padding-top: 48px; }
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero-photo { justify-self: start; max-width: 320px; order: -1; }
  .featured-grid, .case-grid, .about-grid, .mini-grid { grid-template-columns: 1fr; }
  .demo .bullets { grid-template-columns: 1fr; }
  .case-grid { gap: 32px; }
}
@media (max-width: 760px) {
  .menu-btn { display: inline-grid; }
  .nav {
    position: absolute; top: 64px; left: 0; right: 0; margin: 0;
    flex-direction: column; gap: 0; padding: 8px var(--gutter) 16px;
    background: var(--bg); border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav.open { display: flex; }
  .nav a { padding: 14px 4px; border-bottom: 1px solid var(--line); border-radius: 0; }
  .topbar-actions { margin-left: auto; }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  .section { padding-top: 72px; }
  .logo-plate { width: 100px; height: 62px; }
  .logo-plate img { max-height: 46px; }
  .affil-group { padding: 18px; }
  .contact-panel { padding: 28px 20px; }
  .brand-name { display: none; }
  .hero { padding-top: 28px; }
  .hero-photo { max-width: none; }
  .hero-photo img { aspect-ratio: 16 / 10; object-position: 50% 14%; }
  .diagram { padding: 16px; }
  .diagram-scroll::after { content: "← scroll →"; display: block; text-align: center; font: 400 11px/1 var(--font-mono); color: var(--ink-3); padding-top: 10px; position: sticky; left: 0; width: 100%; }
  .cta-row .btn { flex: 1 1 auto; justify-content: center; }
  .card-body { padding: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}

.print-only { display: none; }

/* --------------------------------------------------------------- print
   Used for the PDF portfolio (tools/make_pdf.mjs) and for anyone printing
   the page: always light, everything visible, sections start on new pages,
   and nothing gets split across a page break. */
@media print {
  @page { size: Letter; margin: 0.45in 0.5in 0.55in; }
  :root, :root[data-theme="dark"] {
    --bg: #ffffff; --surface: #ffffff; --surface-2: #f6f8fb;
    --ink: #0b1220; --ink-2: #3f4a58; --ink-3: #5f6b7a;
    --line: #dde2ea; --line-strong: #c5ccd7;
    --accent: #0e7490; --accent-deco: #06b6d4; --accent-soft: rgba(6, 182, 212, 0.10);
    --accent-2: #be185d; --accent-2-soft: rgba(190, 24, 93, 0.08);
    --plate: #ffffff; --shadow: none; --glow: none; --on-accent: #ffffff;
    color-scheme: light;
  }
  html, body { background: #fff !important; }
  body { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  body::before, .topbar, .skip-link, .lightbox, .cursor, .tile-play, .diagram-scroll::after { display: none !important; }
  .print-only { display: block; }
  .led { animation: none; box-shadow: none; }
  .hud::after { filter: none !important; }
  .js .reveal { opacity: 1 !important; transform: none !important; }
  * { transition: none !important; animation: none !important; }

  /* Tighter vertical rhythm than the screen layout */
  .hero { padding: 0; }
  .hero-grid { grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: 32px; }
  .hero h1 { font-size: 3.6rem; }
  .hero-photo { max-width: 290px; }
  .hero .cta-row { display: none; }
  .print-links { display: flex; flex-wrap: wrap; gap: 4px 10px; margin: 16px 0 0; font: 500 13px/1.6 var(--font-mono); }
  .print-links span { color: var(--ink-3); }
  .affil { margin-top: 24px; grid-template-columns: 1fr 1fr; }
  .affil-group + .affil-group { border-left: 1px solid var(--line); border-top: 0; }
  .affil-group { padding: 16px 20px; }
  .affil ul { gap: 10px; }
  .logo-plate { width: 100px; height: 58px; padding: 6px; }
  .logo-plate img { max-height: 44px; }
  .section { padding-top: 0; }
  .section-head { margin-bottom: 18px; break-inside: avoid; }
  #featured { padding-top: 28px; }
  .card-body { padding: 16px 20px 18px; }
  /* 10px top padding keeps a page-top bracket frame (inset -6px) from spilling onto the previous page */
  .case { padding: 10px 0 0; border-top: 0; }
  .case-grid { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: 32px; }
  .case h3 { margin-bottom: 10px; }
  .case-lead { margin-bottom: 10px; }
  .stats { margin: 12px 0; }
  .stats li { padding: 8px 12px; }
  .bullets li { margin-bottom: 6px; }
  /* The rotated-square marker drops out of Chrome's PDF output; use a glyph */
  .bullets li::before { content: "\25C6"; border: 0; transform: none; width: auto; height: auto; top: 0; left: 2px; font-size: 11px; line-height: inherit; color: var(--accent-deco); }
  .case-media { gap: 18px; }
  figcaption { margin-top: 6px; }
  .diagram { max-width: 860px; margin: 22px auto 0; padding: 16px 18px; }
  .diagram svg { min-width: 0; }
  .contact { padding: 32px 0 0; }

  /* Pagination: about, each case study, and the collage start fresh pages.
     The thesis and its demo share a page; the small cards follow F1/10. */
  #about, #work, #jlr, #projects, #f110, #collage { break-before: page; }
  .demo { max-width: 800px; margin-top: 16px; padding: 12px 16px; }
  .demo > figcaption { margin-bottom: 10px; }
  .demo-note { margin-top: 8px; }
  .demo .bullets { gap: 0 28px; margin-top: 10px; }
  #thesis .links { margin-top: 10px; }
  #thesis .status-note { margin-top: 10px; }

  /* Small project cards go horizontal so they fit under F1/10 */
  .mini-grid { margin-top: 20px; gap: 18px; }
  .mini { flex-direction: row; align-items: flex-start; }
  .mini .media { flex: 0 0 30%; margin: 14px 0 14px 14px; }
  .mini .media img { aspect-ratio: 4 / 3; object-fit: cover; }
  .mini .media.paper { padding: 8px; }
  .mini .media.paper img { aspect-ratio: auto; object-fit: contain; width: 100%; }
  .mini .card-body { padding: 12px 16px; flex: 1; min-width: 0; }
  .mini .card-body h3 { font-size: 1.1rem; }
  .mini .card-body p { font-size: .92rem; margin-bottom: .5em; }
  .mini .tag-line { margin-bottom: 8px; }
  .mini .card-body .text-link { padding-top: 4px; }
  .card, figure, .diagram, .edu-item, .skills, .pubs, .stats, .affil, .contact-panel,
  .collage li, .bullets li, .case h3, .case h4 { break-inside: avoid; }
  h2, h3, h4, .meta { break-after: avoid; }

  .collage { columns: 4; column-gap: 12px; }
  .collage li { margin-bottom: 12px; }
  .tile::after { display: none; }
  .footer { border-top: 0; padding-top: 12px; }
  .footer-inner { flex-direction: column; gap: 2px; }
}