/* =========================================================
   Portfolio — dark theme
   Palette and rhythm carried over from the original site.
   ========================================================= */

:root {
  --c-bg: 10 10 11;
  --c-surface: 17 17 20;
  --c-elevated: 26 26 31;
  --c-ink: 240 240 243;
  --c-muted: 174 174 186;
  --c-faint: 140 140 152;
  --c-brand: 130 137 255;
  --c-amber: 245 176 65;
  --line: rgb(255 255 255 / .16);
  --card-bg: rgb(255 255 255 / .055);
  --card-shadow: 0 1px 0 rgb(255 255 255 / .04) inset, 0 10px 30px -18px rgb(0 0 0 / .8);
  --wrap: 1152px;
  --radius: 14px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  background: rgb(var(--c-bg));
  color: rgb(var(--c-ink));
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.15; margin: 0; font-weight: 600; letter-spacing: -.02em; }
p { margin: 0 0 1rem; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }
.muted { color: rgb(var(--c-muted)); }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: rgb(var(--c-brand)); color: #0a0a0b; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Nav ---------- */

header { position: sticky; top: 0; z-index: 50; padding: 16px 24px 0; }

.nav {
  max-width: var(--wrap); margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; padding: 10px 16px;
  background: rgb(var(--c-bg) / .7);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  border-radius: 999px;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand-badge {
  display: grid; place-items: center; width: 30px; height: 30px;
  border-radius: 9px; font-size: 13px; font-weight: 700; letter-spacing: .02em;
  background: linear-gradient(135deg, rgb(var(--c-brand)), rgb(var(--c-brand) / .55));
  color: #0a0a0b;
}
.brand-name { font-size: 15px; }

.nav-links { display: flex; gap: 4px; }
.nav-links a {
  display: block; padding: 7px 12px; border-radius: 999px;
  font-size: 14px; color: rgb(var(--c-muted));
  transition: color .18s ease, background-color .18s ease;
}
.nav-links a:hover { color: rgb(var(--c-ink)); background: rgb(255 255 255 / .06); }
.nav-links a.is-current { color: rgb(var(--c-ink)); background: rgb(255 255 255 / .09); }

.nav-toggle {
  display: none; width: 38px; height: 38px; border-radius: 10px; cursor: pointer;
  background: transparent; border: 1px solid var(--line);
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 16px; height: 1.5px; background: rgb(var(--c-ink)); transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.25px) rotate(-45deg); }

/* ---------- Sections ---------- */

section { padding: 128px 0; position: relative; }
.band { background: rgb(var(--c-surface) / .4); }

.sec-num {
  font-family: var(--mono); font-size: 12px; color: rgb(var(--c-brand));
  margin: 0 0 6px; letter-spacing: .1em;
}
.sec-kicker {
  font-family: var(--mono); font-size: 11px; letter-spacing: .22em;
  color: rgb(var(--c-faint)); margin: 0 0 12px;
}
.sec-title { font-size: clamp(28px, 4vw, 40px); margin-bottom: 20px; }
.sec-lead { color: rgb(var(--c-muted)); max-width: 60ch; margin-bottom: 40px; }

/* ---------- Hero ---------- */

.hero { padding: 172px 0 128px; overflow: hidden; }
.hero-glow {
  position: absolute; inset: -30% 0 auto 50%; transform: translateX(-50%);
  width: min(900px, 100%); height: 700px; pointer-events: none;
  background: radial-gradient(50% 50% at 50% 50%, rgb(var(--c-brand) / .18), transparent 70%);
  filter: blur(20px);
}
.hero-inner { position: relative; }

.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-size: 13px;
  border: 1px solid var(--line); background: rgb(255 255 255 / .04);
  color: rgb(var(--c-muted)); margin-bottom: 28px;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%; background: #4ade80;
  box-shadow: 0 0 0 3px rgb(74 222 128 / .18);
  animation: pulse 2.4s ease-in-out infinite;
}
.dot-amber { background: rgb(var(--c-amber)); box-shadow: 0 0 0 3px rgb(245 176 65 / .18); animation: none; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }

.hero-name {
  font-size: clamp(44px, 8vw, 76px); font-weight: 600; letter-spacing: -.035em;
  background: linear-gradient(180deg, #fff 30%, rgb(var(--c-muted)));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 14px;
}
.hero-role { font-size: clamp(17px, 2.4vw, 21px); color: rgb(var(--c-muted)); margin-bottom: 22px; }
.hero-intro { max-width: 62ch; color: rgb(var(--c-muted)); margin-bottom: 32px; }

.explore-link {
  display: inline-flex; flex-direction: column; gap: 2px; margin-bottom: 34px;
  padding: 12px 18px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--card-bg);
  transition: border-color .2s ease, transform .2s ease;
}
.explore-link:hover { border-color: rgb(var(--c-brand) / .6); transform: translateY(-2px); }
.explore-link span { font-weight: 500; }
.explore-link .arrow { display: inline-block; transition: transform .2s ease; }
.explore-link:hover .arrow { transform: translateX(4px); }
.explore-link small { font-size: 12.5px; color: rgb(var(--c-faint)); font-family: var(--mono); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px; font-size: 14.5px; font-weight: 500;
  border: 1px solid var(--line); background: transparent; color: rgb(var(--c-ink));
  cursor: pointer; transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}
.btn:hover { background: rgb(255 255 255 / .07); transform: translateY(-1px); }
.btn-primary {
  background: rgb(var(--c-brand)); border-color: rgb(var(--c-brand)); color: #0a0a0b; font-weight: 600;
}
.btn-primary:hover { background: rgb(var(--c-brand) / .88); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- Cards ---------- */

.card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 24px;
  transition: border-color .22s ease, transform .22s ease;
}
.card:hover { border-color: rgb(255 255 255 / .26); transform: translateY(-3px); }
.card h3 { font-size: 18px; margin-bottom: 10px; }

.chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  font-family: var(--mono); font-size: 11.5px; padding: 4px 10px;
  border-radius: 999px; border: 1px solid var(--line);
  color: rgb(var(--c-muted)); background: rgb(255 255 255 / .03);
}

/* ---------- About ---------- */

.about-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; align-items: start; }
.about-copy p { color: rgb(var(--c-muted)); max-width: 62ch; }
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.stat {
  padding: 20px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--card-bg);
}
.stat-value { display: block; font-size: 27px; font-weight: 600; letter-spacing: -.02em; color: rgb(var(--c-brand)); }
.stat-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; color: rgb(var(--c-faint)); }

/* ---------- Skills ---------- */

.skill-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
.skill-card h3 { font-size: 15px; color: rgb(var(--c-brand)); margin-bottom: 14px; }

/* ---------- Projects ---------- */

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.filter {
  font-family: var(--mono); font-size: 12px; padding: 6px 14px; cursor: pointer;
  border-radius: 999px; border: 1px solid var(--line);
  background: transparent; color: rgb(var(--c-muted));
  transition: all .18s ease;
}
.filter:hover { color: rgb(var(--c-ink)); border-color: rgb(255 255 255 / .3); }
.filter.is-active { background: rgb(var(--c-brand)); border-color: rgb(var(--c-brand)); color: #0a0a0b; font-weight: 500; }

.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(330px, 1fr)); gap: 18px; }
.project { position: relative; display: flex; flex-direction: column; }
.project.is-featured { border-color: rgb(var(--c-brand) / .45); }
.project.is-featured h3 { padding-right: 88px; }
.project.is-hidden { display: none; }
.featured-flag {
  position: absolute; top: 16px; right: 16px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em;
  padding: 3px 9px; border-radius: 999px;
  background: rgb(var(--c-brand) / .16); color: rgb(var(--c-brand));
  border: 1px solid rgb(var(--c-brand) / .35);
}
.project-sub { color: rgb(var(--c-muted)); font-size: 14.5px; }
.ps { font-size: 14px; color: rgb(var(--c-muted)); }
.ps-label {
  font-family: var(--mono); font-size: 10px; letter-spacing: .12em;
  color: rgb(var(--c-faint)); margin-right: 6px;
}
.ps-solution { color: rgb(var(--c-brand)); }
.project .chips { margin-top: auto; padding-top: 14px; }
.project-links { display: flex; gap: 14px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.project-links a { font-size: 13.5px; color: rgb(var(--c-brand)); }
.project-links a:hover { text-decoration: underline; }
.no-results { margin-top: 28px; }

/* ---------- Timeline ---------- */

.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px;
  width: 1px; background: var(--line);
}
.tl-item { position: relative; padding-bottom: 44px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-marker {
  position: absolute; left: -28px; top: 7px; width: 11px; height: 11px;
  border-radius: 50%; background: rgb(var(--c-elevated)); border: 1px solid var(--line);
}
.tl-item.is-technical .tl-marker {
  background: rgb(var(--c-brand)); border-color: rgb(var(--c-brand));
  box-shadow: 0 0 0 4px rgb(130 137 255 / .15);
}
.tl-date { font-family: var(--mono); font-size: 12px; color: rgb(var(--c-faint)); margin-bottom: 6px; }
.tl-item h3 { font-size: 19px; margin-bottom: 3px; }
.tl-org { color: rgb(var(--c-brand)); font-size: 14.5px; margin-bottom: 14px; }
.tl-bullets li {
  display: flex; gap: 10px; color: rgb(var(--c-muted));
  font-size: 14.5px; margin-bottom: 9px; max-width: 74ch;
}
.tl-arrow { color: rgb(var(--c-brand)); flex-shrink: 0; }
.tl-item .chips { margin-top: 14px; }

/* ---------- Education ---------- */

.edu-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; }
.edu-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.grade {
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em;
  padding: 4px 11px; border-radius: 999px;
  background: rgb(var(--c-brand) / .16); color: rgb(var(--c-brand));
  border: 1px solid rgb(var(--c-brand) / .35);
}
.edu-date { font-family: var(--mono); font-size: 12px; color: rgb(var(--c-faint)); }
.edu-org { color: rgb(var(--c-brand)); font-size: 14.5px; margin-bottom: 14px; }

.certs { margin-top: 40px; }
.certs-title { font-size: 15px; color: rgb(var(--c-brand)); margin-bottom: 16px; }
.cert-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 12px; }
.cert-list li {
  padding: 16px 18px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--card-bg);
}
.cert-name { display: block; font-size: 14.5px; font-weight: 500; }
.cert-issuer { display: block; font-size: 13px; color: rgb(var(--c-muted)); margin-top: 2px; }
.cert-note { display: block; font-family: var(--mono); font-size: 11px; color: rgb(var(--c-faint)); margin-top: 5px; }

/* ---------- Exploring ---------- */

.explore-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 18px; }
.explore-ground { font-size: 14px; color: rgb(var(--c-muted)); margin-bottom: 16px; }
.explore-card .chips { margin-bottom: 18px; }
.explore-status {
  display: flex; align-items: center; gap: 8px; margin: 0;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em;
  color: rgb(var(--c-amber));
}

/* ---------- Contact ---------- */

.contact-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 40px; align-items: start; }
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; color: rgb(var(--c-faint)); }
.field input, .field textarea {
  width: 100%; padding: 12px 14px; border-radius: 10px;
  background: rgb(var(--c-bg) / .6); border: 1px solid var(--line);
  color: rgb(var(--c-ink)); font-family: var(--font); font-size: 15px;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: rgb(var(--c-brand));
  box-shadow: 0 0 0 3px rgb(130 137 255 / .16);
}
.field textarea { resize: vertical; min-height: 120px; }
.err { font-size: 12.5px; color: #f87171; margin: 0; min-height: 0; }
.form-status { font-size: 14px; margin: 0; }
.form-status.is-ok { color: #4ade80; }
.form-status.is-err { color: #f87171; }

.contact-details { display: flex; flex-direction: column; gap: 22px; }
.contact-item { display: flex; flex-direction: column; gap: 4px; }
.contact-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; color: rgb(var(--c-faint)); }
.contact-item a:hover { color: rgb(var(--c-brand)); }
.contact-socials { display: flex; gap: 14px; padding-top: 6px; }
.contact-socials a {
  font-size: 14px; padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--line); transition: all .18s ease;
}
.contact-socials a:hover { border-color: rgb(var(--c-brand)); color: rgb(var(--c-brand)); }

/* ---------- Footer ---------- */

footer { border-top: 1px solid var(--line); padding: 32px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-inner p { margin: 0; font-size: 13.5px; color: rgb(var(--c-faint)); }
.to-top { font-size: 13.5px; color: rgb(var(--c-muted)); }
.to-top:hover { color: rgb(var(--c-brand)); }

/* ---------- Scroll reveal ---------- */

.reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .dot { animation: none; }
  * { transition-duration: .01ms !important; }
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 760px) {
  section { padding: 84px 0; }
  .hero { padding: 132px 0 84px; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: calc(100% + 10px); left: 0; right: 0;
    flex-direction: column; gap: 2px; padding: 12px;
    background: rgb(var(--c-surface));
    border: 1px solid var(--line); border-radius: var(--radius);
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav { position: relative; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .project-grid, .edu-grid, .explore-grid, .skill-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   GitHub stats, writing pages
   ========================================================= */

.gh-stats {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 11.5px; color: rgb(var(--c-faint));
}
.gh-stats li { display: flex; align-items: center; gap: 6px; }
.gh-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgb(var(--c-brand)); flex-shrink: 0;
}
.project .gh-stats + .project-links { border-top: 0; margin-top: 6px; padding-top: 8px; }

.all-writing { margin-top: 32px; }

/* ---------- Page headers (blog) ---------- */

.page-head { padding: 172px 0 72px; }
.page-title {
  font-size: clamp(32px, 5.5vw, 52px); font-weight: 600; letter-spacing: -.03em;
  margin-bottom: 16px;
  background: linear-gradient(180deg, #fff 40%, rgb(var(--c-muted)));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.back-link { display: inline-block; font-size: 14px; color: rgb(var(--c-muted)); margin-bottom: 28px; }
.back-link:hover { color: rgb(var(--c-brand)); }

/* ---------- Post cards ---------- */

.post-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; }
.post-card { display: flex; flex-direction: column; }
.post-card h2, .post-card h3 { font-size: 20px; margin-bottom: 10px; }
.post-card h2 a:hover, .post-card h3 a:hover { color: rgb(var(--c-brand)); }
.post-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 12px;
  font-family: var(--mono); font-size: 11.5px; color: rgb(var(--c-faint));
}
.post-excerpt { color: rgb(var(--c-muted)); font-size: 14.5px; }
.post-card .chips { margin-top: auto; padding-top: 12px; }
.post-more {
  margin-top: 16px; font-size: 13.5px; color: rgb(var(--c-brand));
  display: inline-flex; align-items: center; gap: 6px;
}
.post-more .arrow { transition: transform .2s ease; }
.post-more:hover .arrow { transform: translateX(4px); }

.draft-flag {
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em;
  padding: 2px 8px; border-radius: 999px;
  background: rgb(245 176 65 / .14); color: rgb(var(--c-amber));
  border: 1px solid rgb(245 176 65 / .35);
}
.draft-banner {
  padding: 12px 16px; border-radius: 10px; font-size: 14px;
  background: rgb(245 176 65 / .1); color: rgb(var(--c-amber));
  border: 1px solid rgb(245 176 65 / .3); margin-bottom: 24px;
}

.empty-state { padding: 48px 0; }
.empty-state h2 { font-size: 22px; margin-bottom: 10px; }
.empty-state a { color: rgb(var(--c-brand)); }

/* ---------- Post body ---------- */

.post-wrap { max-width: 760px; }
.post-lead { font-size: 18px; color: rgb(var(--c-muted)); margin-bottom: 22px; }
.post-tags { margin-bottom: 36px; }

.post-body { font-size: 16.5px; line-height: 1.78; }
.post-body p { color: rgb(var(--c-muted)); margin-bottom: 1.25rem; }
.post-h2 { font-size: 25px; margin: 44px 0 14px; }
.post-h3 { font-size: 19px; margin: 32px 0 10px; }
.post-list { margin: 0 0 1.25rem; padding-left: 4px; }
.post-list li {
  position: relative; padding-left: 22px; margin-bottom: 9px; color: rgb(var(--c-muted));
}
.post-list li::before {
  content: "▹"; position: absolute; left: 0; color: rgb(var(--c-brand));
}
.post-body code {
  font-family: var(--mono); font-size: .88em; padding: 2px 6px; border-radius: 5px;
  background: rgb(255 255 255 / .07); color: rgb(var(--c-ink));
}
.post-code {
  background: rgb(var(--c-bg)); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px 20px; overflow-x: auto;
  margin: 0 0 1.5rem; font-size: 13.5px; line-height: 1.65;
}
.post-code code { background: none; padding: 0; font-size: inherit; }
.post-quote {
  margin: 0 0 1.4rem; padding: 4px 0 4px 20px;
  border-left: 2px solid rgb(var(--c-brand));
  color: rgb(var(--c-muted)); font-style: italic;
}
.post-body a { color: rgb(var(--c-brand)); text-decoration: underline; text-underline-offset: 3px; }

.post-foot { margin-top: 52px; padding-top: 26px; border-top: 1px solid var(--line); }
.post-foot a { color: rgb(var(--c-brand)); }

a.filter { display: inline-block; }

@media (max-width: 760px) {
  .page-head { padding: 128px 0 48px; }
  .post-grid { grid-template-columns: 1fr; }
}

.post-rule { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }
.post-body em { color: rgb(var(--c-faint)); }

/* =========================================================
   3D hero canvas
   ========================================================= */

.hero { position: relative; }

.hero-3d {
  position: absolute; inset: 0;
  z-index: 0; pointer-events: none;
  opacity: 0; transition: opacity 1.1s ease;
}
.hero-3d.is-ready { opacity: 1; }
.hero-3d canvas { display: block; width: 100%; height: 100%; }

/* Keep the text above the canvas and readable over it. */
.hero-inner { position: relative; z-index: 1; }
.hero-name, .hero-role, .hero-intro { text-shadow: 0 2px 24px rgb(10 10 11 / .55); }

/* Fade the canvas out behind the copy so text never fights the particles. */
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: linear-gradient(100deg, rgb(var(--c-bg) / .82) 0%, rgb(var(--c-bg) / .45) 42%, transparent 72%);
}

@media (max-width: 760px) {
  .hero-3d { display: none; }
  .hero::after { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-3d { display: none; }
  .hero::after { display: none; }
}

/* Tilt needs its own transform handling — JS sets transform inline, so the
   hover rule must not fight it. */
.project, .post-card, .explore-card, .skill-card, .edu-card {
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform .25s cubic-bezier(.22,.61,.36,1), border-color .22s ease;
}
.project:hover, .post-card:hover, .explore-card:hover,
.skill-card:hover, .edu-card:hover { transform: none; }

/* =========================================================
   Learning tracker
   ========================================================= */

.cert-list li {
  display: flex; flex-direction: column; gap: 3px;
  transition: border-color .2s ease;
}
.cert.is-active { border-color: rgb(var(--c-brand) / .4); }

.cert-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.cert-status {
  flex-shrink: 0;
  font-family: var(--mono); font-size: 9.5px; letter-spacing: .12em;
  padding: 3px 8px; border-radius: 999px; text-transform: uppercase;
  background: rgb(var(--c-brand) / .14); color: rgb(var(--c-brand));
  border: 1px solid rgb(var(--c-brand) / .32);
}
.cert-status.is-planned {
  background: rgb(255 255 255 / .05); color: rgb(var(--c-faint));
  border-color: var(--line);
}

.cert-progress {
  height: 4px; border-radius: 999px; margin-top: 9px;
  background: rgb(255 255 255 / .09); overflow: hidden;
}
.cert-bar {
  display: block; height: 100%; border-radius: 999px;
  background: linear-gradient(90deg, rgb(var(--c-brand) / .65), rgb(var(--c-brand)));
  width: 0; transition: width 1.1s cubic-bezier(.22,.61,.36,1);
}
.cert-pct, .cert-date {
  font-family: var(--mono); font-size: 10.5px; color: rgb(var(--c-faint)); margin-top: 6px;
}
.cert-verify {
  font-size: 12.5px; color: rgb(var(--c-brand)); margin-top: 8px; align-self: flex-start;
}
.cert-verify:hover { text-decoration: underline; }

/* =========================================================
   Robot companion + page transitions
   ========================================================= */

.robot-dock {
  position: fixed; right: 20px; bottom: 20px; z-index: 40;
  display: flex; flex-direction: column; align-items: flex-end; gap: 8px;
  pointer-events: none;
}
.robot-dock > * { pointer-events: auto; }

.robot {
  width: 168px; height: 168px; cursor: pointer;
  filter: drop-shadow(0 12px 26px rgb(0 0 0 / .55));
  transition: opacity .35s ease, transform .35s ease;
}
.robot canvas { display: block; }
.robot:hover { transform: translateY(-3px); }
.robot:focus-visible { outline: 2px solid rgb(var(--c-brand)); outline-offset: 6px; border-radius: 12px; }
.robot.is-hidden { opacity: 0; transform: translateY(24px) scale(.9); pointer-events: none; height: 0; }

.robot-bubble {
  max-width: 236px; margin: 0;
  padding: 10px 14px; border-radius: 14px 14px 4px 14px;
  background: rgb(var(--c-surface)); border: 1px solid var(--line);
  color: rgb(var(--c-muted)); font-size: 13px; line-height: 1.5;
  box-shadow: var(--card-shadow);
  opacity: 0; transform: translateY(8px) scale(.96); transform-origin: bottom right;
  transition: opacity .28s ease, transform .28s ease;
  pointer-events: none;
}
.robot-bubble.is-open { opacity: 1; transform: none; }

.robot-toggle {
  display: flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 6px 12px 6px 8px; border-radius: 999px;
  background: rgb(var(--c-bg) / .82); border: 1px solid var(--line);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: border-color .2s ease;
}
.robot-toggle:hover { border-color: rgb(var(--c-brand) / .6); }
.robot-toggle-track {
  position: relative; width: 30px; height: 17px; border-radius: 999px;
  background: rgb(var(--c-brand)); transition: background-color .25s ease;
}
.robot-toggle-knob {
  position: absolute; top: 2px; left: 2px; width: 13px; height: 13px;
  border-radius: 50%; background: #0a0a0b;
  transition: transform .25s cubic-bezier(.22,.61,.36,1);
}
.robot-toggle.is-off .robot-toggle-track { background: rgb(255 255 255 / .18); }
.robot-toggle.is-off .robot-toggle-knob { transform: translateX(-0px); }
.robot-toggle:not(.is-off) .robot-toggle-knob { transform: translateX(13px); }
.robot-toggle-text {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
  text-transform: uppercase; color: rgb(var(--c-muted));
}

/* ---------- Page wipe ---------- */

.page-wipe {
  position: fixed; inset: 0; z-index: 90; pointer-events: none;
  display: grid; grid-template-rows: repeat(3, 1fr);
}
.page-wipe span {
  display: block; width: 100%; height: 100%;
  background: rgb(var(--c-brand));
  transform: scaleX(0); transform-origin: left center;
}

/* Covering: the three bars sweep in, staggered. */
.page-wipe.is-covering { pointer-events: all; }
.page-wipe.is-covering span {
  animation: wipe-in .42s cubic-bezier(.7,0,.3,1) forwards;
}
.page-wipe.is-covering span:nth-child(2) { animation-delay: .055s; }
.page-wipe.is-covering span:nth-child(3) { animation-delay: .11s; }

/* Revealing: they sweep out to the right. */
.page-wipe.is-revealing span {
  transform: scaleX(1); transform-origin: right center;
  animation: wipe-out .5s cubic-bezier(.7,0,.3,1) forwards;
}
.page-wipe.is-revealing span:nth-child(2) { animation-delay: .06s; }
.page-wipe.is-revealing span:nth-child(3) { animation-delay: .12s; }

@keyframes wipe-in  { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes wipe-out { from { transform: scaleX(1); } to { transform: scaleX(0); } }

@media (max-width: 900px) {
  .robot-dock { right: 14px; bottom: 14px; }
  .robot { display: none; }
  .robot-toggle { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .robot-dock, .page-wipe { display: none; }
}