:root {
  --bg: #0a192f;
  --bg-2: #112240;
  --text: #ccd6f6;
  --muted: #8f9db8;
  --heading: #e6f1ff;
  --accent: #5eead4;
  --accent-ink: #0a192f;
  --line: #233554;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: dark light;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f8fb;
    --bg-2: #ffffff;
    --text: #2b3a55;
    --muted: #5a6985;
    --heading: #0a192f;
    --accent: #0b7a6c;
    --accent-ink: #ffffff;
    --line: #d5dce8;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 1rem/1.7 var(--font); -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { color: var(--heading); line-height: 1.25; margin: 0; }
p { margin: 0 0 1rem; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.skip { position: absolute; left: 1rem; top: -4rem; background: var(--accent); color: var(--accent-ink); padding: .6rem 1rem; border-radius: 6px; z-index: 100; }
.skip:focus { top: 1rem; }

.layout { max-width: 76rem; margin: 0 auto; padding: 0 1.25rem; }

/* Side column: stacked on mobile, fixed on desktop */
.side { padding: 2rem 0 1rem; }
.photo { border-radius: 50%; border: 2px solid var(--line); display: block; margin-bottom: 1rem; }
.side h1 { font-size: clamp(2rem, 5vw, 2.6rem); letter-spacing: -.02em; }
.side h1 a { color: inherit; text-decoration: none; }
.title { font-size: 1.15rem; color: var(--heading); margin: .35rem 0 .75rem; }
.tagline { color: var(--muted); max-width: 22rem; }
.loc { color: var(--muted); font-family: var(--mono); font-size: .85rem; }

.nav ul { display: flex; flex-wrap: wrap; gap: .25rem 1.1rem; margin-top: 1.25rem; }
.nav a { display: flex; align-items: center; gap: .8rem; padding: .35rem 0; color: var(--muted); text-decoration: none; font: .8rem/1.2 var(--mono); text-transform: uppercase; letter-spacing: .12em; }
.nav .bar { display: none; width: 2rem; height: 1px; background: var(--muted); transition: width .2s, background .2s; }
.nav a:hover, .nav a[aria-current="true"] { color: var(--heading); }

.social { display: flex; gap: 1.25rem; margin-top: 1.5rem; }
.social a { color: var(--muted); display: inline-flex; padding: .25rem; }
.social a:hover { color: var(--accent); }

.main { padding-bottom: 4rem; }
section { padding: 3rem 0 1rem; }
h2 { font: 700 .85rem/1 var(--mono); text-transform: uppercase; letter-spacing: .15em; color: var(--accent); margin-bottom: 1.5rem; }
h3 { font-size: 1.05rem; }
.sub { margin: 2rem 0 .75rem; }

.timeline > li { padding: 0 0 1.75rem 1.25rem; border-left: 2px solid var(--line); position: relative; }
.timeline > li::before { content: ""; position: absolute; left: -6px; top: .45rem; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }
.when { font: .8rem/1.4 var(--mono); color: var(--muted); margin: 0 0 .25rem; }
.timeline h3 { margin-bottom: .5rem; }

.tags { display: flex; flex-wrap: wrap; gap: .5rem; margin: .75rem 0 1rem; }
.tags li { font: .78rem/1 var(--mono); padding: .45rem .7rem; border-radius: 999px; background: var(--bg-2); border: 1px solid var(--line); color: var(--text); }

.cards { display: grid; gap: 1rem; }
.card { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 1.4rem; transition: transform .2s, border-color .2s; }
.card:hover { border-color: var(--accent); }
.card h3 { margin-bottom: .6rem; }
.card h3 a { text-decoration: none; }
.card-soon { border-style: dashed; background: transparent; }
.card-soon:hover { border-color: var(--line); }

.skills div { padding: 1rem 0; border-top: 1px solid var(--line); }
.skills dt { color: var(--heading); font-weight: 600; }
.skills dd { margin: .2rem 0 0; color: var(--muted); }

.plain li { padding: .35rem 0 .35rem 1.25rem; position: relative; }
.plain li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }

.btn { display: inline-block; padding: .8rem 1.3rem; border: 1px solid var(--accent); border-radius: 6px; color: var(--accent); text-decoration: none; font-family: var(--mono); font-size: .9rem; }
.btn:hover { background: var(--accent); color: var(--accent-ink); }
.links { color: var(--muted); }
.foot { margin-top: 3rem; color: var(--muted); font-size: .85rem; }

/* Fade in on scroll (JS adds .js to <html>) */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  * { transition: none !important; }
}

/* Mobile: simple sticky top nav */
@media (max-width: 899px) {
  .side-top .photo, .side-top .tagline, .side-top .loc { display: block; }
  .nav { position: sticky; top: 0; z-index: 10; background: var(--bg); margin: 0 -1.25rem; padding: 0 1.25rem; border-bottom: 1px solid var(--line); }
  .nav ul { margin-top: 0; overflow-x: auto; flex-wrap: nowrap; scrollbar-width: none; }
  .nav a { white-space: nowrap; padding: .85rem 0; }
  .side { padding-bottom: 0; }
  .side-top { display: contents; }
  .side { display: flex; flex-direction: column; }
  .side-top > :not(.nav) { order: 0; }
  .social { order: 2; margin: 1rem 0 1.5rem; }
  .nav { order: 3; }
}
@media (min-width: 600px) and (max-width: 899px) { .cards { grid-template-columns: 1fr 1fr; } }

/* Desktop: fixed left column */
@media (min-width: 900px) {
  .layout { display: grid; grid-template-columns: 22rem 1fr; gap: 5rem; padding: 0 2rem; }
  .side { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; justify-content: space-between; padding: 5rem 0 3rem; }
  .nav ul { flex-direction: column; gap: 0; margin-top: 2.5rem; }
  .nav .bar { display: block; }
  .nav a:hover .bar, .nav a[aria-current="true"] .bar { width: 4rem; background: var(--heading); }
  .main { padding-top: 3rem; max-width: 42rem; }
  .social { margin-top: 0; }
}

/* ---- Dynamic layer ---- */
#bg { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -2; pointer-events: none; }
.spot { position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(520px circle at var(--mx, 50%) var(--my, 30%), color-mix(in srgb, var(--accent) 11%, transparent), transparent 70%); }
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 100%; z-index: 50; background: var(--accent); transform-origin: 0 50%; transform: scaleX(var(--p, 0)); }
.caret { display: inline-block; width: 2px; height: 1.05em; margin-left: 2px; vertical-align: -.15em; background: var(--accent); animation: blink 1s steps(1) infinite; }
.rot { color: var(--heading); }
@keyframes blink { 50% { opacity: 0; } }

.card { position: relative; transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); will-change: transform; }
.card::after { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity .25s;
  background: radial-gradient(260px circle at var(--cx, 50%) var(--cy, 50%), color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%); }
.card:hover::after { opacity: 1; }

.pipe ol { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1rem 0 .5rem; counter-reset: s; }
.pipe { margin: 0; }
.pipe li { counter-increment: s; position: relative; padding: .5rem .8rem; font: .78rem/1.2 var(--mono); border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); animation: stage 6s infinite; }
.pipe li::before { content: counter(s); margin-right: .5rem; color: var(--accent); }
.pipe li:nth-child(2) { animation-delay: 1.5s; } .pipe li:nth-child(3) { animation-delay: 3s; } .pipe li:nth-child(4) { animation-delay: 4.5s; }
@keyframes stage { 0%, 25%, 100% { border-color: var(--line); } 5%, 20% { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); } }

.reveal-item { opacity: 0; transform: translateY(12px); transition: opacity .5s ease, transform .5s ease; transition-delay: calc(var(--i, 0) * 70ms); }
.in .reveal-item, .in.reveal-item { opacity: 1; transform: none; }
.btn { transition: background .2s, color .2s, transform .15s; }

@media (max-width: 899px) { .nav ul { -webkit-mask-image: linear-gradient(90deg, #000 85%, transparent); mask-image: linear-gradient(90deg, #000 85%, transparent); padding-right: 2rem; } }
@media (prefers-reduced-motion: reduce) {
  .caret, .pipe li { animation: none; }
  .reveal-item { opacity: 1; transform: none; transition: none; }
  .card { transform: none; }
  .progress { transition: none; }
}
@media (hover: none) { .spot { display: none; } }
#nf { min-height: 100vh; display: grid; place-content: center; text-align: center; }
.tagline { min-height: 3.4em; }

/* ---- Presentation layer ---- */
.lead { font-size: 1.2rem; color: var(--heading); line-height: 1.5; }
.glance { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem 1.5rem; margin: 1.75rem 0 0; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.glance dt, .kv dt { font: .72rem/1 var(--mono); text-transform: uppercase; letter-spacing: .12em; color: var(--accent); margin-bottom: .35rem; }
.glance dd, .kv dd { margin: 0; }
.org { color: var(--muted); font-weight: 500; }
.bullets { margin: .5rem 0 .25rem; }
.bullets li { position: relative; padding: .15rem 0 .15rem 1.1rem; }
.bullets li::before { content: "▹"; position: absolute; left: 0; color: var(--accent); }
.timeline .tags { margin-top: .5rem; }
.card-feature { padding: 1.6rem; }
.card-feature h3 { font-size: 1.25rem; margin-bottom: 1rem; }
.kv > div { padding: .6rem 0; border-top: 1px solid var(--line); }
.kv { margin: 0 0 .5rem; }
.note { font-size: .82rem; color: var(--muted); margin: .25rem 0 0; }
.skillgrid { display: grid; gap: 1.5rem 2rem; }
.skillgrid h3 { font-size: .95rem; color: var(--heading); }
.skillgrid .tags { margin-top: .6rem; }
@media (min-width: 600px) { .skillgrid { grid-template-columns: 1fr 1fr; } }