/* ============================================================
   Thierry Lafeber — Portfolio
   Minimal, Google-inspired design system
   ============================================================ */

:root {
  --accent: #3FB3DC;
  --accent-hover: #2A8FB5;
  --accent-soft: #E6F4FA;
  --accent-deep: #1F6F8E;

  --bg: #ffffff;
  --bg-soft: #eef2f6;
  --bg-muted: #e2e9ef;
  --bg-tint: #f3f7fa;

  --fg: #1c2a33;
  --fg-muted: #4d6471;
  --fg-faint: #7a8c96;

  --border: #cfdae1;
  --border-strong: #a8b9c4;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --shadow-1: 0 1px 2px rgba(60,64,67,0.06), 0 2px 6px rgba(60,64,67,0.08);
  --shadow-2: 0 2px 4px rgba(60,64,67,0.08), 0 8px 20px rgba(60,64,67,0.10);
  --shadow-card: 0 1px 2px rgba(60,64,67,0.06), 0 4px 12px rgba(60,64,67,0.08);
  --shadow-card-dark: 0 1px 2px rgba(0,0,0,0.4), 0 8px 20px rgba(0,0,0,0.35);

  --container: 1080px;
  --gap-section: 96px;

  --font-sans: 'Google Sans Text', 'Google Sans', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'Google Sans', 'Google Sans Text', -apple-system, system-ui, sans-serif;
  --font-mono: 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

::selection { background: var(--accent-soft); color: var(--accent-hover); }

/* Container */
.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  :root { --gap-section: 64px; }
}

/* ===== Nav ===== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-brand {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.01em;
  display: flex; align-items: center; gap: 10px;
  color: #2F3437;
}
body.dark .nav-brand {
  color: #e6eef5;
}
.nav-brand-logo {
  display: block;
  height: 20px;
  width: auto;
}
body.dark .nav-brand-logo {
  filter: none;
}
.nav-brand-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
}
.nav-links {
  display: flex; gap: 4px; align-items: center;
}
.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--fg-muted);
  transition: background .15s ease, color .15s ease;
  position: relative;
}
.nav-link:hover { background: var(--bg-muted); color: var(--fg); }
.nav-link.active { color: var(--accent); }
.nav-cta {
  margin-left: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: #fff !important;
  font-size: 14px;
  font-weight: 500;
  transition: background .15s ease, box-shadow .15s ease, transform .15s ease;
}
.nav-cta:hover { background: var(--accent-hover); box-shadow: var(--shadow-2); transform: translateY(-1px); }
.nav-cta:active { transform: translateY(0); box-shadow: var(--shadow-1); }
@media (max-width: 720px) {
  .nav-links .nav-link { display: none; }
}

/* ===== Hero ===== */
.hero {
  padding: 80px 0 64px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 56px;
  align-items: center;
}
@media (max-width: 720px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-muted);
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.hero-eyebrow-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #34a853;
  box-shadow: 0 0 0 4px rgba(52,168,83,.15);
}
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 500;
  margin: 20px 0 16px;
  text-wrap: balance;
}
.hero h1 .accent { color: var(--accent); }
.hero-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 560px;
  text-wrap: pretty;
  margin: 0 0 28px;
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 8px 20px;
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 28px;
}
.hero-meta-item {
  display: inline-flex; align-items: center; gap: 8px;
}
.hero-meta-icon {
  width: 16px; height: 16px;
  color: var(--accent);
}
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background .15s ease, box-shadow .15s ease, transform .15s ease, border-color .15s ease;
  font-family: inherit;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: var(--shadow-2); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-1); }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--bg-soft); border-color: var(--fg-faint); box-shadow: var(--shadow-1); transform: translateY(-1px); }
.btn-ghost:active { transform: translateY(0); box-shadow: none; }

/* Profile photo placeholder */
.hero-photo {
  width: 220px; height: 220px;
  border-radius: 50%;
  background: var(--bg-soft);
  position: relative;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
}
.hero-photo-initials {
  font-family: var(--font-display);
  font-size: 72px;
  font-weight: 400;
  color: var(--fg-faint);
  letter-spacing: -0.02em;
}
.hero-photo-stripes {
  position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    transparent 0,
    transparent 14px,
    rgba(95,99,104,0.04) 14px,
    rgba(95,99,104,0.04) 15px
  );
}
@media (max-width: 720px) {
  .hero-photo { width: 140px; height: 140px; }
  .hero-photo-initials { font-size: 48px; }
}

/* ===== Section ===== */
.section { padding: var(--gap-section) 0; }
.section-soft { background: var(--bg-soft); }

.section-header {
  margin-bottom: 48px;
  display: flex; align-items: end; justify-content: space-between;
  gap: 24px;
}
.section-header.section-header-stack {
  display: block;
}
.section-header.section-header-stack .section-lead {
  margin-top: 16px;
  max-width: 640px;
}
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 500;
  margin: 0;
  text-wrap: balance;
}
.section-lead {
  font-size: 16px;
  color: var(--fg-muted);
  max-width: 520px;
  margin: 12px 0 0;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
}
@media (max-width: 760px) { .about-grid { grid-template-columns: 1fr; } }
.about-prose p {
  font-size: 17px;
  color: var(--fg);
  line-height: 1.7;
  margin: 0 0 18px;
}
.about-prose p:last-child { margin-bottom: 0; }

.info-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.info-row {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.info-row:last-child { border-bottom: none; }
.info-row:first-child { padding-top: 0; }
.info-label { color: var(--fg-faint); font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; padding-top: 2px; }
.info-value { color: var(--fg); }
.info-value a:hover { color: var(--accent); }

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
@media (max-width: 760px) { .skills-grid { grid-template-columns: 1fr; } }
.skill-cat {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
}
.skill-cat-header {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 18px;
}
.skill-cat-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.skill-cat h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.01em;
}
.skill-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.skill-tag {
  display: inline-block;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
  transition: background .15s, color .15s, border-color .15s;
}
.skill-tag:hover { background: var(--accent-soft); color: var(--accent-hover); border-color: var(--accent-soft); }

/* ===== Experience timeline ===== */
.timeline {
  position: relative;
}
.tl-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 32px;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  position: relative;
}
.tl-item:first-child { border-top: none; }
.tl-period {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-faint);
  padding-top: 4px;
}
.tl-period-current {
  color: var(--accent);
}
.tl-period-current::before {
  content: '';
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(63, 179, 220, 0.18);
  margin-right: 8px;
  vertical-align: middle;
  animation: tl-pulse 2.4s ease-in-out infinite;
}
@keyframes tl-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(63, 179, 220, 0.18); }
  50%      { box-shadow: 0 0 0 6px rgba(63, 179, 220, 0.06); }
}
.tl-content {
  position: relative;
}
.tl-role {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
.tl-org {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.tl-org-sep { color: var(--fg-faint); }
.tl-summary {
  font-size: 15px;
  color: var(--fg);
  line-height: 1.65;
  max-width: 720px;
  margin: 0 0 12px;
  text-wrap: pretty;
}
.tl-toggle {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: none; border: none; padding: 0; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  transition: color .2s ease, transform .2s ease;
}
.tl-toggle:hover { color: var(--accent-hover); }
.tl-toggle-label {
  position: relative;
}
.tl-toggle-label::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .25s cubic-bezier(.2,.8,.2,1);
}
.tl-toggle:hover .tl-toggle-label::after { transform: scaleX(1); }
.tl-toggle-icon {
  display: inline-flex;
  transition: transform .35s cubic-bezier(.2,.8,.2,1);
}
.tl-toggle[aria-expanded="true"] .tl-toggle-icon { transform: rotate(180deg); }

.tl-details {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  margin-top: 0;
  border-left: 2px solid var(--accent);
  border-left-color: transparent;
  transition:
    grid-template-rows .35s cubic-bezier(.2,.8,.2,1),
    opacity .25s ease .05s,
    margin-top .35s cubic-bezier(.2,.8,.2,1),
    border-left-color .2s ease;
}
.tl-details.is-open {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: 14px;
  border-left-color: var(--accent);
}
.tl-details-inner {
  overflow: hidden;
  padding-left: 18px;
}
.tl-details ul { margin: 0; padding-left: 18px; }
.tl-details li {
  font-size: 14px;
  color: var(--fg-muted);
  margin-bottom: 6px;
  line-height: 1.6;
  /* Per-line stagger when opening */
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity .25s ease, transform .25s ease;
  transition-delay: calc(var(--li-i, 0) * 30ms);
}
.tl-details.is-open li {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(120ms + var(--li-i, 0) * 35ms);
}
@media (prefers-reduced-motion: reduce) {
  .tl-details, .tl-details li, .tl-toggle-icon { transition: none; }
}

@media (max-width: 720px) {
  .tl-item { grid-template-columns: 1fr; gap: 8px; }
  .tl-period { padding-top: 0; }
}

/* ===== Lab / projects ===== */
.lab-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .lab-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .lab-grid { grid-template-columns: 1fr; } }
.lab-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.lab-card-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.lab-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.lab-card p {
  font-size: 14px;
  color: var(--fg-muted);
  margin: 0 0 14px;
  line-height: 1.6;
}
.lab-card-stack {
  display: flex; flex-wrap: wrap; gap: 4px;
}
.lab-card-stack span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-faint);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  background: var(--bg-soft);
}

/* ===== Education scroll-reveal animations ===== */
.edu-block {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity .45s cubic-bezier(.2,.8,.2,1),
    transform .45s cubic-bezier(.2,.8,.2,1);
  transition-delay: calc(var(--block-i, 0) * 80ms);
}
.edu-block.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.edu-item {
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity .35s ease,
    transform .35s ease;
  transition-delay: calc(120ms + var(--block-i, 0) * 80ms + var(--item-i, 0) * 45ms);
}
.edu-item.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .edu-block, .edu-item { transition: none; opacity: 1; transform: none; }
}

/* ===== Education + Certificates + Languages ===== */
.three-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
@media (max-width: 900px) { .three-grid { grid-template-columns: 1fr; } }
.tg-block h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
  margin: 0 0 16px;
  display: flex; align-items: center; gap: 10px;
}
.tg-block h3 svg { color: var(--accent); }
.tg-list { display: flex; flex-direction: column; gap: 12px; }
.tg-item {
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}
.tg-item-title { font-size: 14px; font-weight: 500; color: var(--fg); margin: 0 0 2px; }
.tg-item-meta { font-size: 12px; color: var(--fg-faint); font-family: var(--font-mono); }

.lang-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
}
.lang-name { font-size: 14px; font-weight: 500; }
.lang-level {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.lang-dots { display: inline-flex; gap: 4px; margin-left: 12px; vertical-align: middle; }
.lang-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--border-strong); }
.lang-dot.on { background: var(--accent); }

/* ===== Contact ===== */
.contact-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px;
  text-align: center;
  box-shadow: var(--shadow-card);
}
@media (max-width: 600px) { .contact-card { padding: 36px 24px; } }
.contact-card h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 40px);
  letter-spacing: -0.02em;
  font-weight: 500;
  margin: 0 0 14px;
}
.contact-card p {
  color: var(--fg-muted);
  font-size: 17px;
  max-width: 480px;
  margin: 0 auto 28px;
}
.contact-actions { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.contact-channels {
  display: flex; flex-wrap: wrap; gap: 24px;
  justify-content: center;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.contact-ch {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px;
  color: var(--fg-muted);
}
.contact-ch svg { color: var(--accent); }
.contact-ch a:hover { color: var(--accent); }

/* ===== Footer ===== */
.footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--fg-faint);
}
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* Reveal-on-scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* Whole-section reveal-on-scroll (matches the per-item Education effect) */
.reveal-section {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity .6s cubic-bezier(.2,.8,.2,1),
    transform .6s cubic-bezier(.2,.8,.2,1);
}
.reveal-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal-section { opacity: 1; transform: none; transition: none; }
}

/* Density variants */
body.density-compact { --gap-section: 64px; }
body.density-compact .section-header { margin-bottom: 32px; }
body.density-compact .tl-item { padding: 20px 0; }
body.density-compact .skill-cat, body.density-compact .lab-card { padding: 20px; }

/* ===== Hero photo (real image) ===== */
.hero-photo-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 30%; }

/* ===== Hobbies ===== */
.hobby-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 800px) { .hobby-grid { grid-template-columns: 1fr; } }
.hobby-card {
  padding: 28px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}
.hobby-card-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.hobby-card h3 { font-family: var(--font-display); font-size: 18px; font-weight: 500; margin: 0 0 8px; letter-spacing: -0.01em; }
.hobby-card p { font-size: 14px; color: var(--fg-muted); margin: 0; line-height: 1.65; }

/* ===== Reference ===== */
.ref-card {
  padding: 40px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  max-width: 720px;
  margin: 0 auto;
  box-shadow: var(--shadow-card);
}
.ref-quote {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--fg);
  margin: 0 0 24px;
  text-wrap: pretty;
}
.ref-attrib { display: flex; align-items: center; gap: 14px; }
.ref-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 16px;
}
.ref-name { font-size: 14px; font-weight: 500; }
.ref-role { font-size: 12px; color: var(--fg-faint); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; }

/* ===== Dark mode ===== */
body.dark {
  --bg: #0f1620;
  --bg-soft: #172230;
  --bg-muted: #1f2d3d;
  --fg: #e6eef5;
  --fg-muted: #b6c5d2;
  --fg-faint: #7e94a4;
  --border: #2f4258;
  --border-strong: #46607c;
  --accent: #5DC4E5;
  --accent-hover: #7DD2EC;
  --accent-soft: rgba(93, 196, 229, 0.16);
  --shadow-card: 0 1px 2px rgba(0,0,0,0.5), 0 8px 22px rgba(0,0,0,0.45);
  --shadow-1: 0 1px 2px rgba(0,0,0,0.5), 0 4px 12px rgba(0,0,0,0.4);
  --shadow-2: 0 2px 6px rgba(0,0,0,0.5), 0 12px 28px rgba(0,0,0,0.5);
}
body.dark { background: var(--bg); color: var(--fg); }
body.dark .nav { background: rgba(15,22,32,0.85); }
body.dark ::selection { background: var(--accent-soft); color: var(--fg); }
body.dark .info-card,
body.dark .skill-cat,
body.dark .lab-card,
body.dark .hobby-card,
body.dark .tg-item,
body.dark .lang-row,
body.dark .ref-card,
body.dark .contact-card { background: var(--bg-soft); }
body.dark .skill-tag { background: var(--bg-muted); border-color: var(--border); color: var(--fg-muted); }
body.dark .lab-card-stack span { background: var(--bg-muted); }
body.dark .btn-ghost { color: var(--fg); border-color: var(--border-strong); }
body.dark .btn-ghost:hover { background: var(--bg-muted); }
body.dark .hero-eyebrow { background: var(--bg-soft); border-color: var(--border); color: var(--fg-muted); }
/* Variant overrides for dark mode */
body.dark.variant-material { background: #0f1011; }
body.dark.variant-material .nav { background: rgba(15,16,17,0.85); }
body.dark.variant-material .section .wrap,
body.dark.variant-material .hero { background: var(--bg-soft); }
body.dark.variant-material .info-card,
body.dark.variant-material .skill-cat,
body.dark.variant-material .lab-card,
body.dark.variant-material .hobby-card,
body.dark.variant-material .tg-item,
body.dark.variant-material .lang-row,
body.dark.variant-material .ref-card,
body.dark.variant-material .contact-card { background: var(--bg-muted); border-color: var(--border-strong); box-shadow: var(--shadow-card); }

/* ===== Theme toggle button ===== */
.theme-toggle {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--fg-muted);
  cursor: pointer;
  margin-right: 6px;
  transition: background .15s, color .15s, border-color .15s;
}
.theme-toggle:hover { background: var(--bg-muted); color: var(--fg); }

/* ===== Font pairings (set on body) ===== */
body.font-default { --font-sans: 'Google Sans Text', system-ui, sans-serif; --font-display: 'Google Sans Text', system-ui, sans-serif; }
body.font-roboto  { --font-sans: 'Roboto', system-ui, sans-serif; --font-display: 'Roboto', system-ui, sans-serif; }
body.font-inter   { --font-sans: 'Inter', system-ui, sans-serif; --font-display: 'Inter', system-ui, sans-serif; }
body.font-serif   { --font-sans: 'Inter', system-ui, sans-serif; --font-display: 'Fraunces', Georgia, serif; }
body.font-mono    { --font-sans: 'Inter', system-ui, sans-serif; --font-display: 'JetBrains Mono', ui-monospace, monospace; }