/* ============================================================
   Jasper Buntinx — portfolio
   Dark, refined-minimal theme. Space Grotesk headings + Inter body.
   ============================================================ */

:root {
  /* surfaces */
  --bg: #0e0f12;
  --bg-elev: #16181d;
  --bg-elev-2: #1c1f25;
  --border: rgba(255,255,255,.09);
  --border-strong: rgba(255,255,255,.16);

  /* text */
  --text: #d7dade;
  --text-strong: #f4f6f8;
  --muted: #9aa0a8;
  --faint: #6d727b;

  /* accent — lifted A&M maroon that reads on dark */
  --accent: #e06a72;
  --accent-hover: #ec828a;
  --accent-quiet: rgba(224,106,114,.14);
  --accent-line: rgba(224,106,114,.35);

  /* light mat for framed documents (certs, résumé) */
  --mat: #f2f0eb;

  --maxw: 1160px;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 32px rgba(0,0,0,.38);
  --shadow-lg: 0 2px 6px rgba(0,0,0,.45), 0 24px 60px rgba(0,0,0,.5);

  --font-head: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.72;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* subtle top glow so the dark page has depth */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(224,106,114,.10), transparent 60%),
    radial-gradient(900px 500px at 8% -6%, rgba(90,120,200,.07), transparent 60%);
}

img { max-width: 100%; display: block; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

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

h1, h2, h3, h4 {
  font-family: var(--font-head); font-weight: 600; color: var(--text-strong);
  line-height: 1.12; letter-spacing: -0.02em;
}
h2 { font-size: clamp(1.65rem, 2.6vw, 2.25rem); margin-bottom: 16px; }
h3 { font-size: 1.16rem; letter-spacing: -0.01em; }

p { text-wrap: pretty; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
.container-narrow { max-width: 780px; margin: 0 auto; padding: 0 32px; }

.section { padding: 104px 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14,15,18,.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 32px;
  height: 72px; display: flex; align-items: center; justify-content: space-between;
}
.site-title {
  font-family: var(--font-head); font-weight: 600; font-size: 1.16rem;
  color: var(--text-strong); letter-spacing: -0.02em;
}
.site-title:hover { color: var(--text-strong); }
.site-nav { display: flex; gap: 34px; align-items: center; }
.site-nav a {
  color: var(--muted); font-size: .95rem; font-weight: 500; letter-spacing: -0.01em;
  position: relative; padding: 4px 0; transition: color .15s ease;
}
.site-nav a:hover { color: var(--text-strong); }
.site-nav a.active { color: var(--text-strong); }
.site-nav a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px;
  background: var(--accent); border-radius: 2px;
}

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; transition: .2s; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px; padding: 12px 24px;
  background: var(--accent); color: #1a0d0e; border: 1px solid transparent;
  font-family: var(--font-body); font-weight: 600; font-size: .92rem; letter-spacing: -0.01em;
  border-radius: 8px; transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { background: var(--accent-hover); color: #1a0d0e; transform: translateY(-2px); box-shadow: 0 10px 26px rgba(224,106,114,.26); }
.btn-outline { background: transparent; border-color: var(--border-strong); color: var(--text-strong); }
.btn-outline:hover { background: var(--bg-elev-2); border-color: var(--accent); color: var(--text-strong); box-shadow: none; }
.btn svg { width: 17px; height: 17px; fill: currentColor; flex-shrink: 0; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* ---------- home hero ---------- */
.hero {
  padding: 132px 0 108px; position: relative;
  border-bottom: 1px solid var(--border);
}
.hero .kicker {
  display: inline-block; font-family: var(--font-head); font-weight: 500;
  font-size: .82rem; text-transform: uppercase; letter-spacing: .22em;
  color: var(--accent); margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(3rem, 8vw, 5.5rem); letter-spacing: -0.035em; line-height: 1.0;
  color: var(--text-strong);
}
.hero .tagline { margin-top: 22px; font-size: 1.12rem; color: var(--muted); max-width: 46ch; }

.hero-inner { display: flex; align-items: flex-start; justify-content: space-between; gap: 56px; }
.hero-text { flex: 1; min-width: 0; }
.hero-photo { flex-shrink: 0; margin-top: 40px; position: relative; }

/* easter-egg tag tucked at the top-right of the headshot */
.egg-link {
  position: absolute; top: -20px; right: -30px; z-index: 4;
  display: inline-flex; align-items: center; gap: 6px;
  transform: rotate(-11deg);
  background: var(--accent-quiet); border: 1px dashed var(--accent-line); color: var(--accent);
  padding: 7px 14px; border-radius: 999px; white-space: nowrap;
  font-family: var(--font-head); font-weight: 600; font-size: .78rem; letter-spacing: .01em;
  box-shadow: 0 8px 22px rgba(0,0,0,.35);
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.egg-link .egg-arrow { font-weight: 700; }
.egg-link:hover {
  transform: rotate(-11deg) translateY(-3px) scale(1.05);
  background: var(--accent); color: #1a0d0e; border-color: var(--accent);
}
.hero-photo img {
  width: 240px; height: 240px; border-radius: 50%; object-fit: cover;
  border: 1px solid var(--border-strong);
  box-shadow: 0 0 0 6px rgba(255,255,255,.03), 0 0 0 7px var(--accent-line), var(--shadow-lg);
}

/* ---------- strengths / weaknesses ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.two-col > div {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 30px 32px;
}
.two-col h2 { font-size: 1.3rem; margin-bottom: 16px; }
.two-col ul { list-style: none; padding: 0; }
.two-col li { position: relative; padding-left: 22px; margin-bottom: 10px; color: var(--text); }
.two-col li::before { content: ""; position: absolute; left: 0; top: .62em; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }

/* section eyebrow used on home */
.section > .container > h2 { position: relative; }

/* ---------- experience timeline ---------- */
.timeline { position: relative; margin-top: 40px; }
.timeline::before {
  content: ""; position: absolute; top: 8px; bottom: 8px; left: 220px;
  width: 1px; background: var(--border-strong);
}
.tl-item { display: grid; grid-template-columns: 192px 54px 1fr; margin-bottom: 46px; }
.tl-item:last-child { margin-bottom: 0; }
.tl-meta { text-align: right; font-size: .88rem; color: var(--faint); padding-top: 3px; }
.tl-meta .tl-dates { display: block; font-weight: 600; color: var(--text); font-family: var(--font-head); letter-spacing: -0.01em; }
.tl-dot { position: relative; }
.tl-dot::before {
  content: ""; position: absolute; top: 7px; left: 21px; width: 13px; height: 13px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px var(--bg), 0 0 0 6px var(--accent-line);
}
.tl-body h3 { margin-bottom: 5px; }
.tl-body p { color: var(--muted); margin-bottom: 8px; }
.read-more {
  display: inline-block; font-family: var(--font-head); font-weight: 500; font-size: .84rem;
  letter-spacing: .02em; color: var(--accent);
}
.read-more:hover { color: var(--accent-hover); }

/* ---------- portfolio filters ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0 34px; }
.filter-btn {
  border: 1px solid var(--border); cursor: pointer; padding: 9px 20px; border-radius: 999px;
  background: var(--bg-elev); color: var(--muted);
  font-family: var(--font-body); font-weight: 600; font-size: .86rem; letter-spacing: -0.01em;
  transition: color .15s, border-color .15s, background .15s;
}
.filter-btn:hover { color: var(--text-strong); border-color: var(--border-strong); }
.filter-btn.item-active { background: var(--accent); border-color: var(--accent); color: #1a0d0e; }

/* ---------- portfolio tiles ---------- */
.tile-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.tile {
  position: relative; display: block; overflow: hidden; border-radius: var(--radius);
  aspect-ratio: 4 / 3; background: var(--bg-elev); border: 1px solid var(--border);
  box-shadow: var(--shadow); transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.tile:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.tile img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.tile:hover img { transform: scale(1.05); }
.tile.hide { display: none; }

.tile-fill {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  text-align: center; padding: 20px; color: var(--muted);
  font-family: var(--font-head); font-weight: 600; font-size: 1.3rem; letter-spacing: -0.01em;
  background-color: #14161b;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 26px 26px;
}

.tile-info {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 46px 20px 18px;
  background: linear-gradient(to top, rgba(8,9,11,.92) 8%, rgba(8,9,11,.55) 55%, rgba(8,9,11,0));
}
.tile-title { display: block; color: #fff; font-family: var(--font-head); font-weight: 600; font-size: 1.06rem; line-height: 1.25; letter-spacing: -0.01em; }
.tile-cat { display: block; color: rgba(255,255,255,.72); font-size: .74rem; text-transform: uppercase; letter-spacing: .12em; margin-top: 4px; font-weight: 600; }

.section-buttons { text-align: center; margin-top: 48px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- big image nav buttons (home) ---------- */
.nav-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.nav-card {
  position: relative; display: block; overflow: hidden; aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg); border: 1px solid var(--border); box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.nav-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.nav-card img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.nav-card:hover img { transform: scale(1.05); }
.nav-card-overlay {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 9px; text-align: center; padding: 22px;
  background: linear-gradient(to top, rgba(8,9,11,.86), rgba(8,9,11,.4) 55%, rgba(8,9,11,.55));
}
.nav-card-title {
  font-family: var(--font-head); font-weight: 600; letter-spacing: -0.02em; color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.15rem);
}
.nav-card-cta {
  font-family: var(--font-head); font-weight: 500; font-size: .8rem; letter-spacing: .12em;
  text-transform: uppercase; color: rgba(255,255,255,.82);
}
.nav-card:hover .nav-card-cta { color: #fff; }

/* ---------- page headers ---------- */
.page-header { padding: 64px 0 8px; }
.page-header > p { margin-top: 10px; color: var(--muted); max-width: 62ch; }

/* ---------- detail pages ---------- */
.crumb { font-size: .9rem; margin-bottom: 20px; }
.crumb a { color: var(--faint); font-weight: 500; }
.crumb a:hover { color: var(--accent); }
.detail-meta { margin: 12px 0 4px; color: var(--faint); font-size: .93rem; }
.detail-meta strong { color: var(--accent); font-family: var(--font-head); font-weight: 600; }

.detail-body { font-size: 1.02rem; }
.detail-body h2 { margin-top: 52px; }
.detail-body p { margin-bottom: 16px; color: var(--text); max-width: 70ch; }
.detail-body ul { padding-left: 24px; margin-bottom: 16px; }
.detail-body li { margin-bottom: 6px; }

.figrow { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin: 26px 0 32px; }
.figrow figure { margin: 0; }
.figrow img {
  width: 100%; height: 340px; object-fit: contain;
  border-radius: var(--radius); border: 1px solid var(--border); background: var(--bg-elev);
  padding: 12px; cursor: zoom-in; display: block;
}
.figrow figcaption { font-size: .84rem; color: var(--faint); margin-top: 9px; }

.skills-list { columns: 3; padding-left: 22px; margin: 14px 0 0; }
.skills-list li { font-family: var(--font-head); font-weight: 500; color: var(--text); margin-bottom: 9px; break-inside: avoid; letter-spacing: -0.01em; }
.skills-list li::marker { color: var(--accent); }

.detail-nav { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; border-top: 1px solid var(--border); margin-top: 60px; padding-top: 26px; }
.detail-nav a { font-family: var(--font-head); font-weight: 500; font-size: .92rem; letter-spacing: -0.01em; }

/* ---------- engineering case studies ---------- */
.case-page { padding-bottom: 92px; }
.case-shell { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

.case-hero {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  gap: 64px; align-items: center; padding: 64px 0 44px;
}
.case-hero-copy .crumb { margin-bottom: 28px; }
.case-eyebrow {
  display: block; margin-bottom: 13px; color: var(--accent);
  font-family: var(--font-head); font-size: .76rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase;
}
.case-hero h1 { font-size: clamp(2.8rem, 6vw, 5rem); line-height: .98; }
.case-deck {
  max-width: 58ch; margin-top: 22px; color: var(--text);
  font-size: clamp(1.06rem, 1.6vw, 1.24rem); line-height: 1.58;
}
.case-role { margin-top: 22px; color: var(--muted); font-size: .9rem; }
.case-role strong { color: var(--text-strong); }

.case-hero-visual {
  overflow: hidden; margin: 0; border: 1px solid var(--border);
  border-radius: var(--radius-lg); background: var(--bg-elev);
  box-shadow: var(--shadow-lg);
}
.case-hero-visual img {
  width: 100%; aspect-ratio: 4 / 3; object-fit: cover; cursor: zoom-in;
}
.case-hero-visual figcaption {
  padding: 12px 16px 14px; color: var(--faint); font-size: .8rem;
}

.case-metrics {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  background: rgba(22,24,29,.78); box-shadow: var(--shadow);
}
.case-metric { min-width: 0; padding: 22px 24px; border-right: 1px solid var(--border); }
.case-metric:last-child { border-right: 0; }
.case-metric strong {
  display: block; color: var(--text-strong); font-family: var(--font-head);
  font-size: clamp(1.25rem, 2.2vw, 1.72rem); line-height: 1.1;
}
.case-metric span {
  display: block; margin-top: 7px; color: var(--faint);
  font-size: .74rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
}

.case-section {
  display: grid; grid-template-columns: 190px minmax(0, 1fr);
  gap: 46px; padding: 76px 0; border-top: 1px solid var(--border);
}
.case-section-label { position: sticky; top: 104px; align-self: start; }
.case-index {
  display: block; margin-bottom: 10px; color: var(--accent);
  font-family: var(--font-head); font-size: .76rem; font-weight: 600; letter-spacing: .16em;
}
.case-section-label h2 { margin: 0; font-size: 1.25rem; line-height: 1.22; }
.case-lead {
  max-width: 64ch; margin-bottom: 28px; color: var(--text);
  font-size: 1.08rem; line-height: 1.68;
}
.case-grid { display: grid; gap: 18px; }
.case-grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.case-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.case-card {
  padding: 24px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev);
}
.case-card-kicker {
  display: block; margin-bottom: 10px; color: var(--accent);
  font-family: var(--font-head); font-size: .7rem; font-weight: 600;
  letter-spacing: .13em; text-transform: uppercase;
}
.case-card h3 { margin-bottom: 9px; }
.case-card p { color: var(--muted); font-size: .93rem; line-height: 1.62; }

.case-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.case-flow-step {
  position: relative; padding: 26px; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-elev);
}
.case-flow-step:not(:last-child)::after {
  content: "→"; position: absolute; right: -16px; top: 50%; z-index: 2;
  transform: translateY(-50%); color: var(--accent); font-size: 1.2rem;
}
.case-flow-step strong {
  display: block; margin-bottom: 8px; color: var(--text-strong);
  font-family: var(--font-head); font-size: 1.08rem;
}
.case-flow-step p { color: var(--muted); font-size: .9rem; line-height: 1.55; }

.case-figures {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px; margin-top: 28px;
}
.case-figures.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.case-figure {
  overflow: hidden; margin: 0; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-elev);
}
.case-figure img {
  width: 100%; height: 340px; object-fit: contain; padding: 12px; cursor: zoom-in;
  transition: transform .35s ease;
}
.case-figure:hover img { transform: scale(1.025); }
.case-figure figcaption { padding: 12px 15px 14px; color: var(--faint); font-size: .8rem; }

.case-result {
  display: grid; grid-template-columns: minmax(180px, .35fr) 1fr;
  gap: 28px; align-items: center; margin-top: 28px; padding: 30px;
  border: 1px solid var(--accent-line); border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent-quiet), rgba(22,24,29,.92));
}
.case-result strong {
  color: var(--text-strong); font-family: var(--font-head);
  font-size: clamp(1.55rem, 3vw, 2.35rem); line-height: 1.05;
}
.case-result p { color: var(--text); line-height: 1.62; }

.case-tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
.case-tag {
  padding: 7px 12px; border: 1px solid var(--border-strong); border-radius: 999px;
  background: var(--bg-elev); color: var(--text); font-family: var(--font-head);
  font-size: .76rem; font-weight: 500;
}

/* ---------- resume page (framed print on dark) ---------- */
.resume-image {
  max-width: 840px; margin: 32px auto 0; border-radius: var(--radius-lg);
  background: var(--mat); padding: 12px; border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-lg);
}
.resume-image img { width: 100%; border-radius: 6px; }

/* ---------- certifications ---------- */
.cert-group { margin-bottom: 52px; }
.cert-group-title {
  font-family: var(--font-head); font-weight: 600; font-size: .82rem;
  text-transform: uppercase; letter-spacing: .18em; color: var(--accent);
  padding-bottom: 12px; margin-bottom: 26px; border-bottom: 1px solid var(--border);
}
.cert-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.cert-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cert-item { margin: 0; }
/* certificates are documents — present them as framed prints on a light mat */
.cert-item .cert-frame {
  aspect-ratio: 1.373; overflow: hidden; border-radius: 10px;
  background: var(--mat); padding: 10px; border: 1px solid var(--border-strong);
  box-shadow: var(--shadow); transition: transform .18s ease, box-shadow .18s ease;
}
.cert-item .cert-frame:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.cert-item img { width: 100%; height: 100%; object-fit: contain; cursor: zoom-in; display: block; border-radius: 4px; }
.cert-item figcaption { margin-top: 12px; }
.cert-item figcaption strong { display: block; color: var(--text-strong); font-weight: 600; letter-spacing: -0.01em; }
.cert-item figcaption span { color: var(--faint); font-size: .86rem; }

.cert-fill {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  color: #6a6a6a; font-family: var(--font-head); font-weight: 600; font-size: 1.6rem; border-radius: 4px;
  background: #e4e1da;
}

/* ---------- expandable grouped sets ---------- */
.track {
  border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden;
  background: var(--bg-elev);
}
.track-main { display: grid; grid-template-columns: 1.05fr 1fr; gap: 36px; padding: 32px; align-items: center; }
.track-cert { max-width: 100%; }
/* the framed cover cert inside a track uses the light-mat treatment too */
.track-main > .cert-frame {
  aspect-ratio: 1.373; background: var(--mat); padding: 10px; border: 1px solid var(--border-strong);
  border-radius: 10px; overflow: hidden; box-shadow: var(--shadow);
}
.track-main > .cert-frame img { width: 100%; height: 100%; object-fit: contain; cursor: zoom-in; border-radius: 4px; }
.track-badge { font-family: var(--font-head); font-weight: 600; font-size: .74rem; text-transform: uppercase; letter-spacing: .16em; color: var(--accent); }
.track-info h3 { font-size: 1.55rem; margin: 10px 0 12px; }
.track-info p { color: var(--muted); font-size: .96rem; margin-bottom: 22px; }
.track-toggle {
  display: inline-flex; align-items: center; gap: 10px; cursor: pointer;
  padding: 11px 22px; border: 1px solid var(--border-strong); border-radius: 8px;
  background: var(--bg-elev-2); color: var(--text-strong);
  font-family: var(--font-head); font-weight: 500; font-size: .88rem; letter-spacing: -0.01em;
  transition: border-color .15s, background .15s;
}
.track-toggle:hover { border-color: var(--accent); background: var(--bg-elev); }
.track-toggle .chev { transition: transform .2s ease; }
.track-toggle.open .chev { transform: rotate(180deg); }

.track-courses { padding: 4px 32px 32px; border-top: 1px solid var(--border); }
.track-courses[hidden] { display: none; }
.track-courses-label { font-family: var(--font-head); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .14em; color: var(--faint); margin: 24px 0 18px; }

/* clickable cover photo for a grouped set */
.group-cover-photo {
  position: relative; display: block; padding: 0; cursor: pointer; width: 100%;
  aspect-ratio: 1.373; border: 1px solid var(--border-strong); border-radius: 10px;
  background: var(--mat); font: inherit; color: inherit; overflow: hidden; box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}
.group-cover-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.group-cover-photo .cover-overlay {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: flex-end; gap: 5px; padding: 20px;
  background: linear-gradient(to top, rgba(8,9,11,.86) 0%, rgba(8,9,11,.25) 46%, rgba(8,9,11,0) 72%);
  color: #fff; text-align: center;
}
.group-cover-photo .cover-count { font-family: var(--font-head); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; }
.group-cover-photo .cover-cta { font-family: var(--font-head); font-weight: 500; font-size: .76rem; text-transform: uppercase; letter-spacing: .1em; opacity: .92; }
.group-cover-photo:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.group-cover-photo:hover .cover-cta { text-decoration: underline; text-underline-offset: 3px; }
.group-cover-photo .chev { display: inline-block; transition: transform .2s ease; }
.group-cover-photo.open .chev { transform: rotate(180deg); }

/* ---------- skills search ---------- */
.skill-search { position: relative; max-width: 620px; margin: 0 0 12px; }
.skill-search svg {
  position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
  width: 19px; height: 19px; fill: var(--faint); pointer-events: none;
}
.skill-search input {
  width: 100%; padding: 15px 18px 15px 48px; border-radius: 10px;
  background: var(--bg-elev); border: 1px solid var(--border-strong); color: var(--text-strong);
  font-family: var(--font-body); font-size: 1rem; letter-spacing: -0.01em;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.skill-search input::placeholder { color: var(--faint); }
.skill-search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-quiet); }

.skill-noresults { color: var(--muted); margin: 8px 0 0; }
.skill-noresults.hide { display: none; }

.skill-group { margin-top: 44px; }
.skill-group.hide { display: none; }
.skill-group-title {
  font-family: var(--font-head); font-weight: 600; font-size: .82rem;
  text-transform: uppercase; letter-spacing: .18em; color: var(--accent);
  padding-bottom: 12px; margin-bottom: 22px; border-bottom: 1px solid var(--border);
}
.skill-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.skill-card {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; transition: border-color .15s ease, transform .15s ease;
}
.skill-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.skill-card.hide { display: none; }
.skill-name {
  display: block; font-family: var(--font-head); font-weight: 600; font-size: 1.04rem;
  color: var(--text-strong); letter-spacing: -0.01em; margin-bottom: 12px;
}
.skill-uses { display: flex; flex-wrap: wrap; gap: 7px; }
.skill-uses a {
  font-size: .78rem; font-weight: 500; padding: 4px 11px; border-radius: 999px;
  background: var(--accent-quiet); color: var(--accent); border: 1px solid var(--accent-line);
  transition: background .15s ease, color .15s ease;
}
.skill-uses a:hover { background: var(--accent); color: #1a0d0e; }
.skill-use-muted { font-size: .78rem; color: var(--faint); font-style: italic; padding: 4px 2px; }

/* ---------- home intro skill search (type-ahead) ---------- */
.hero-search-wrap { max-width: 560px; margin-top: 32px; }
.skill-ac {
  position: absolute; left: 0; right: 0; top: calc(100% + 6px); z-index: 30;
  background: var(--bg-elev); border: 1px solid var(--border-strong); border-radius: 10px;
  box-shadow: var(--shadow-lg); max-height: 340px; overflow-y: auto;
}
.skill-ac[hidden] { display: none; }
.skill-ac-item {
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
  width: 100%; text-align: left; padding: 11px 16px; cursor: pointer;
  background: none; border: 0; border-bottom: 1px solid var(--border);
  color: var(--text); font-family: var(--font-body); font-size: .95rem;
}
.skill-ac-item:last-child { border-bottom: 0; }
.skill-ac-item:hover, .skill-ac-item.active { background: var(--bg-elev-2); color: var(--text-strong); }
.skill-ac-item .ac-cat {
  font-family: var(--font-head); font-size: .68rem; text-transform: uppercase;
  letter-spacing: .1em; color: var(--faint); flex-shrink: 0;
}
.skill-ac-all { border-bottom: 1px solid var(--border-strong); }
.skill-ac-all span:first-child { color: var(--accent); font-weight: 600; }
.hero-search-browse {
  display: inline-block; margin-top: 12px;
  font-family: var(--font-head); font-weight: 500; font-size: .84rem; color: var(--muted);
}
.hero-search-browse:hover { color: var(--accent); }
.skill-results { margin-top: 20px; display: grid; gap: 12px; }
.skill-results:empty { margin: 0; }
.skill-result-card {
  background: var(--bg-elev); border: 1px solid var(--border-strong);
  border-radius: var(--radius); padding: 20px 22px;
}

/* ---------- off-the-clock (easter egg) page ---------- */
.egg-eyebrow {
  font-family: var(--font-head); font-weight: 600; font-size: .82rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.egg-highlights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 46px; }
.egg-card {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 24px 24px 26px;
}
.egg-card .egg-card-label {
  display: block; font-family: var(--font-head); font-weight: 600; font-size: .72rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
}
.egg-card h3 { font-size: 1.15rem; margin-bottom: 9px; }
.egg-card p { color: var(--muted); font-size: .93rem; }
.egg-card strong { color: var(--text); }
@media (max-width: 860px) { .egg-highlights { grid-template-columns: 1fr; } }

.egg-interests { display: flex; flex-wrap: wrap; gap: 10px; }
.egg-interests span {
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--text);
  font-family: var(--font-head); font-weight: 500; font-size: .92rem;
  padding: 8px 16px; border-radius: 999px;
}
/* topic photo tiles (reuse .tile look, open in lightbox) */
.phototile { margin: 0; }
.phototile img { cursor: zoom-in; }
.phototile .tile-info { pointer-events: none; }
.phototile:has(.tile-fill) .tile-info { display: none; }

.gallery { columns: 3; column-gap: 16px; }
.gallery-item {
  break-inside: avoid; margin: 0 0 16px; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.gallery-item img { width: 100%; display: block; cursor: zoom-in; }
.gallery-ph {
  display: flex; align-items: center; justify-content: center; color: var(--faint);
  font-family: var(--font-head); font-weight: 600; font-size: 1.05rem; letter-spacing: .02em;
  background-color: #14161b;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 24px 24px;
}
@media (max-width: 860px) { .gallery { columns: 2; } }
@media (max-width: 560px) { .gallery { columns: 1; } }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 96px; padding: 30px 0; font-size: .9rem; color: var(--faint); }
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

/* ---------- lightbox ---------- */
.lightbox { position: fixed; inset: 0; z-index: 100; display: none; align-items: center; justify-content: center; background: rgba(6,7,9,.94); padding: 48px; }
.lightbox.open { display: flex; }
.lightbox figure { max-width: min(1120px, 92vw); text-align: center; }
.lightbox img { max-height: 82vh; max-width: 100%; margin: 0 auto; border-radius: 8px; box-shadow: 0 30px 80px rgba(0,0,0,.6); }
.lightbox figcaption { color: #b6bbc2; margin-top: 14px; font-size: .92rem; }
.lb-close, .lb-prev, .lb-next { position: absolute; background: none; border: 0; color: #fff; font-size: 2.4rem; cursor: pointer; line-height: 1; padding: 12px; opacity: .72; transition: opacity .15s; }
.lb-close:hover, .lb-prev:hover, .lb-next:hover { opacity: 1; }
.lb-close { top: 16px; right: 24px; }
.lb-prev { left: 16px; top: 50%; transform: translateY(-50%); }
.lb-next { right: 16px; top: 50%; transform: translateY(-50%); }

/* ---------- reveal-on-scroll ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .tile:hover img { transform: none; }
}

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .tile-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid, .cert-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
  .track-main { grid-template-columns: 1fr; gap: 24px; }
  .track-main > .cert-frame, .group-cover-photo { max-width: 520px; }
  .skills-list { columns: 2; }
  .timeline::before { left: 7px; }
  .tl-item { grid-template-columns: 34px 1fr; }
  .tl-meta { grid-column: 2; grid-row: 2; text-align: left; margin-top: 3px; }
  .tl-meta .tl-dates { display: inline; }
  .tl-dot { grid-column: 1; grid-row: 1; }
  .tl-dot::before { left: 0; }
  .tl-body { grid-column: 2; grid-row: 1; }
  .case-hero { grid-template-columns: 1fr; gap: 34px; }
  .case-hero-visual { max-width: 720px; }
  .case-metrics { grid-template-columns: repeat(2, 1fr); }
  .case-metric:nth-child(2) { border-right: 0; }
  .case-metric:nth-child(-n+2) { border-bottom: 1px solid var(--border); }
}

@media (max-width: 860px) {
  .hero-inner { flex-direction: column-reverse; align-items: flex-start; gap: 30px; }
  .hero-photo img { width: 132px; height: 132px; }
}

@media (max-width: 680px) {
  .section { padding: 68px 0; }
  .hero { padding: 92px 0 68px; }
  .container, .container-narrow { padding: 0 22px; }
  .header-inner { padding: 0 22px; }
  .two-col { grid-template-columns: 1fr; gap: 20px; }
  .tile-grid, .cert-grid, .cert-grid.cols-3, .nav-cards { grid-template-columns: 1fr; }
  .skills-list { columns: 1; }
  .case-page { padding-bottom: 68px; }
  .case-shell { padding: 0 22px; }
  .case-hero { padding: 42px 0 34px; }
  .case-hero h1 { font-size: clamp(2.55rem, 13vw, 4rem); }
  .case-metrics { grid-template-columns: 1fr 1fr; }
  .case-metric { padding: 18px; }
  .case-section { grid-template-columns: 1fr; gap: 22px; padding: 58px 0; }
  .case-section-label { position: static; }
  .case-grid.cols-2, .case-grid.cols-3, .case-flow, .case-figures, .case-figures.cols-3 {
    grid-template-columns: 1fr;
  }
  .case-flow-step:not(:last-child)::after { content: "↓"; right: 24px; top: auto; bottom: -18px; }
  .case-result { grid-template-columns: 1fr; gap: 14px; padding: 24px; }

  .nav-toggle { display: block; }
  .site-header { position: relative; }
  .site-nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0; z-index: 40;
    flex-direction: column; gap: 0; align-items: flex-start;
    background: var(--bg-elev); border-bottom: 1px solid var(--border); padding: 8px 22px 18px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 11px 0; width: 100%; }

  .lightbox { padding: 14px; }
  .lb-prev { left: 0; } .lb-next { right: 0; }
}