@property --glow-a { syntax: "<color>"; inherits: true; initial-value: #3de8b0; }
@property --glow-b { syntax: "<color>"; inherits: true; initial-value: #6366f1; }

:root {
  --bg: #07100d;
  --surface: rgba(255, 255, 255, .045);
  --border: rgba(255, 255, 255, .11);
  --text: #eef3f0;
  --muted: #9db0a8;
  --mint: #3de8b0;
  --yellow: #f1e6a4;
  --pink: #ff6aa2;
  --maxw: 1080px;
  --radius: 20px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 72px; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 17px/1.65 -apple-system, "SF Pro Display", system-ui, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img { max-width: 100%; height: auto; }
a { color: var(--mint); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--mint); outline-offset: 3px; border-radius: 8px; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.skip { position: absolute; left: -999px; top: 8px; z-index: 200; background: var(--mint); color: #04201c; padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 8px; }

/* Ambient colour field: follows the chapter you are in */
.ambient { position: fixed; inset: 0; z-index: 0; pointer-events: none; transition: --glow-a 1.2s ease, --glow-b 1.2s ease;
  background:
    radial-gradient(60vmax 50vmax at 12% 20%, color-mix(in srgb, var(--glow-a) 24%, transparent), transparent 70%),
    radial-gradient(55vmax 50vmax at 92% 80%, color-mix(in srgb, var(--glow-b) 20%, transparent), transparent 70%); }
main, .footer { position: relative; z-index: 1; }

.progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 120; }
.progress span { display: block; height: 100%; width: 100%; transform-origin: 0 50%; transform: scaleX(0); background: linear-gradient(90deg, var(--mint), var(--yellow), var(--pink)); }

/* Cursor */
.cursor { display: none; }
@media (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .has-cursor .cursor { display: block; position: fixed; left: 0; top: 0; z-index: 300; pointer-events: none; width: 38px; height: 38px; margin: -19px 0 0 -19px; border: 1.5px solid rgba(238, 243, 240, .65); border-radius: 50%; transition: width .25s var(--ease), height .25s var(--ease), margin .25s var(--ease), background .25s, border-color .25s; mix-blend-mode: difference; }
  .has-cursor .cursor i { position: absolute; left: 50%; top: 50%; width: 5px; height: 5px; margin: -2.5px; border-radius: 50%; background: #fff; }
  .has-cursor .cursor.hot { width: 72px; height: 72px; margin: -36px 0 0 -36px; background: rgba(255, 255, 255, .9); border-color: transparent; }
}

/* Navigation */
.nav { position: sticky; top: 0; z-index: 100; }
.nav-inner { max-width: 1280px; margin: 0 auto; padding: 14px 28px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { color: var(--text); font-weight: 800; text-decoration: none; letter-spacing: -.01em; white-space: nowrap; font-size: 18px; }
.nav-links { list-style: none; margin: 0; padding: 0; display: flex; gap: 22px; overflow-x: auto; scrollbar-width: none; }
.nav-links::-webkit-scrollbar { display: none; }
.nav-links li { margin: 0; }
.nav-links a { color: #cdd9d3; text-decoration: none; font-size: 15px; white-space: nowrap; position: relative; padding: 4px 0; transition: color .2s; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--mint); transform: scaleX(0); transform-origin: 0 50%; transition: transform .35s var(--ease); }
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }
.nav.over { background: linear-gradient(180deg, rgba(7, 16, 13, .75), rgba(7, 16, 13, 0)); transition: background .3s ease; }
.nav.over.solid { background: rgba(7, 16, 13, .72); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }

/* Hero */
.hero { position: relative; min-height: 100vh; min-height: 100svh; margin-top: -61px; display: flex; align-items: flex-end; overflow: hidden; background: var(--bg); }
.hero-video { position: absolute; inset: -4%; width: 108%; height: 108%; object-fit: cover; display: block; will-change: transform; }
.hero-shade { position: absolute; inset: 0; background:
  linear-gradient(90deg, rgba(7, 16, 13, .82) 0%, rgba(7, 16, 13, .35) 48%, rgba(7, 16, 13, 0) 78%),
  linear-gradient(0deg, rgba(7, 16, 13, .95) 0%, rgba(7, 16, 13, 0) 45%); }
.hero-glow { position: absolute; inset: 0; pointer-events: none; mix-blend-mode: screen; opacity: .9;
  background: radial-gradient(420px circle at var(--mx, 70%) var(--my, 40%), rgba(61, 232, 176, .22), transparent 65%); }
.hero-inner { position: relative; z-index: 2; padding-top: 96px; padding-bottom: 10vh; max-width: 1280px; padding-left: 28px; padding-right: 28px; }
.eyebrow { margin: 0 0 18px; color: var(--mint); font-weight: 700; letter-spacing: .22em; text-transform: uppercase; font-size: 12px; }
h1 { margin: 0 0 24px; font-size: clamp(2.5rem, 6.4vw, 5.6rem); line-height: 1; letter-spacing: -.045em; font-weight: 800; max-width: 15ch; }
h1 .w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: .08em; margin-bottom: -.08em; }
h1 .w > span { display: inline-block; }
.grad { background: linear-gradient(100deg, var(--c1, var(--mint)), var(--c2, var(--yellow)), var(--c1, var(--mint))); background-size: 220% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent; animation: shift 7s linear infinite; }
h1 .grad { --c1: var(--mint); --c2: var(--yellow); }
@keyframes shift { to { background-position: -220% 0; } }
.lead { max-width: 54ch; color: #c1d0c9; font-size: 1.15rem; margin: 0 0 34px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.btn { display: inline-block; padding: 14px 26px; border-radius: 14px; font-weight: 700; font-size: 16px; text-decoration: none; color: var(--text); background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(8px); transition: background .25s, border-color .25s, color .25s; will-change: transform; }
.btn:hover { border-color: var(--mint); background: rgba(61, 232, 176, .1); }
.btn.primary { background: var(--mint); color: #04201c; border-color: var(--mint); }
.btn.primary:hover { background: #7bf5cf; }

.scroll-cue { position: absolute; z-index: 2; right: 40px; bottom: 36px; width: 24px; height: 40px; border: 1.5px solid rgba(238, 243, 240, .55); border-radius: 14px; }
.scroll-cue span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: var(--mint); animation: cue 1.8s ease-in-out infinite; }
@keyframes cue { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* Marquee */
.marquee { overflow: hidden; border-block: 1px solid var(--border); background: rgba(7, 16, 13, .6); backdrop-filter: blur(6px); padding: 20px 0; }
.marquee-track { display: flex; width: max-content; gap: 56px; animation: marquee 38s linear infinite; padding-left: 56px; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee span { font-size: clamp(1.4rem, 3.2vw, 2.4rem); font-weight: 800; letter-spacing: -.03em; color: transparent; -webkit-text-stroke: 1px rgba(238, 243, 240, .55); white-space: nowrap; transition: color .25s; }
.marquee span:nth-child(3n+1):hover { color: var(--mint); } .marquee span:nth-child(3n+2):hover { color: var(--yellow); } .marquee span:nth-child(3n):hover { color: var(--pink); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Chapters */
.chapter { position: relative; padding: 18vh 0; }
.kicker { display: flex; align-items: center; gap: 14px; margin: 0 0 22px; color: var(--muted); letter-spacing: .2em; text-transform: uppercase; font-size: 13px; font-weight: 600; }
.kicker b { color: var(--c1); font-size: 13px; letter-spacing: .08em; }
.kicker::after { content: ""; flex: 0 0 64px; height: 1px; background: linear-gradient(90deg, var(--c1), transparent); }
h2.big { margin: 0 0 24px; font-size: clamp(2.2rem, 6vw, 4.8rem); line-height: 1.02; letter-spacing: -.04em; font-weight: 800; }
h3 { margin: 0 0 6px; font-size: 1.2rem; letter-spacing: -.01em; }
h3.sub { margin: 72px 0 12px; font-size: 1.5rem; }
p { margin: 0 0 16px; }
.note { color: var(--muted); font-size: 15px; max-width: 62ch; }
.meta { color: var(--muted); font-size: 15px; margin-bottom: 12px; }
ul { padding-left: 1.2rem; }
li { margin-bottom: 8px; }

/* About */
.statement { font-size: clamp(1.5rem, 3.6vw, 2.8rem); line-height: 1.25; letter-spacing: -.025em; font-weight: 700; margin: 0 0 32px; max-width: 28em; }
.statement .word { display: inline-block; }
.sub-statement { color: var(--muted); font-size: 1.15rem; max-width: 58ch; margin-bottom: 56px; }
.interests { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--border); }
.interests li { margin: 0; display: grid; grid-template-columns: minmax(220px, 1fr) 2fr; gap: 24px; padding: 22px 8px; border-bottom: 1px solid var(--border); transition: background .3s, padding .35s var(--ease); }
.interests li:hover { background: linear-gradient(90deg, color-mix(in srgb, var(--c1) 12%, transparent), transparent); padding-left: 22px; }
.interests strong { font-size: 1.15rem; letter-spacing: -.01em; }
.interests span { color: var(--muted); }
@media (max-width: 720px) { .interests li { grid-template-columns: 1fr; gap: 4px; } }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 16px; margin: 40px 0 72px; }
.stat { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; display: flex; flex-direction: column; overflow: hidden; }
.stat::before { content: ""; position: absolute; inset: 0; background: radial-gradient(300px circle at var(--gx, 50%) var(--gy, 0%), color-mix(in srgb, var(--c1) 22%, transparent), transparent 60%); opacity: 0; transition: opacity .3s; }
.stat:hover::before { opacity: 1; }
.stat-num { position: relative; font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 800; letter-spacing: -.04em; line-height: 1; background: linear-gradient(120deg, var(--c1), var(--c2)); -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent; }
.stat-label { position: relative; color: var(--muted); font-size: 15px; margin-top: 10px; }

/* Timeline */
.timeline { position: relative; padding-left: 36px; }
.timeline-line { position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px; background: var(--border); }
.timeline-line span { display: block; width: 100%; height: 100%; transform-origin: 50% 0; background: linear-gradient(180deg, var(--c1), var(--c2)); }
.job { position: relative; margin: 0 0 56px; }
.job::before { content: ""; position: absolute; left: -36px; top: 8px; width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 2px solid var(--c1); box-shadow: 0 0 0 5px color-mix(in srgb, var(--c1) 18%, transparent); }
.job h3 { font-size: 1.7rem; letter-spacing: -.025em; }

/* Certs */
.certs { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; margin-top: 18px; }
.cert { display: flex; align-items: center; gap: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; color: var(--text); text-decoration: none; transition: transform .35s var(--ease), border-color .25s; }
.cert:hover { border-color: var(--c1); transform: translateY(-4px); }
.cert small { color: var(--muted); }

/* Research: sticky stacking panels */
.stack { margin-top: 40px; }
.panel { position: sticky; top: 14vh; background: linear-gradient(160deg, rgba(255, 255, 255, .075), rgba(255, 255, 255, .025)); border: 1px solid var(--border); border-radius: 28px; padding: clamp(24px, 4vw, 48px); margin-bottom: 8vh; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); transform-origin: 50% 0; overflow: hidden; }
.panel::before { content: ""; position: absolute; width: 520px; height: 520px; right: -160px; top: -200px; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--c1) 30%, transparent), transparent 65%); pointer-events: none; }
.panel:nth-child(2)::before { background: radial-gradient(circle, color-mix(in srgb, var(--c2) 32%, transparent), transparent 65%); }
.panel h3 { position: relative; font-size: clamp(1.7rem, 3.6vw, 2.6rem); letter-spacing: -.035em; }
.panel h3 a { color: var(--text); text-decoration: none; background: linear-gradient(var(--c1), var(--c1)) 0 100% / 0 3px no-repeat; transition: background-size .45s var(--ease); }
.panel h3 a:hover { background-size: 100% 3px; }
.panel > *:not(h3) { position: relative; }
.panel strong { color: var(--text); }

/* Projects: horizontal scroller (pinned on desktop) */
.hs { padding: 0; }
.hs-pin { min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; justify-content: center; padding: 10vh 0; }
.hs-head { margin-bottom: 36px; }
.hs-track { display: flex; gap: 20px; padding: 0 max(24px, calc((100vw - var(--maxw)) / 2 + 24px)); width: max-content; }
.card { position: relative; flex: 0 0 min(420px, 80vw); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color .25s; overflow: hidden; display: flex; flex-direction: column; }
.card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(340px circle at var(--gx, 50%) var(--gy, 0%), color-mix(in srgb, var(--c1) 24%, transparent), transparent 60%); opacity: 0; transition: opacity .3s; pointer-events: none; }
.card:hover { border-color: color-mix(in srgb, var(--c1) 70%, transparent); }
.card:hover::before { opacity: 1; }
.card h3 { position: relative; font-size: 1.5rem; letter-spacing: -.025em; margin-bottom: 12px; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a::after { content: " ↗"; color: var(--c1); }
.card p { position: relative; color: var(--muted); }
.more-card { justify-content: center; text-decoration: none; color: var(--text); background: linear-gradient(150deg, color-mix(in srgb, var(--c1) 22%, transparent), color-mix(in srgb, var(--c2) 12%, transparent)); }
.more-card span { position: relative; font-size: 1.6rem; font-weight: 800; letter-spacing: -.03em; line-height: 1.15; }
.more-card small { position: relative; color: var(--muted); font-size: 15px; margin-top: 10px; }
.hs.static { padding: 18vh 0; }
.hs.static .hs-pin { padding: 0; }
.hs.static .hs-track { width: auto; flex-wrap: wrap; padding: 0 24px; max-width: var(--maxw); margin: 0 auto; }
.hs.static .card { flex: 1 1 300px; }
@media (max-width: 899px) {
  .hs { padding: 18vh 0; } .hs-pin { padding: 0; }
  .hs-track { width: auto; flex-wrap: wrap; padding: 0 24px; max-width: var(--maxw); margin: 0 auto; }
  .card { flex: 1 1 300px; }
}

/* Skills */
.skills { display: grid; gap: 14px; margin: 32px 0 0; }
.skills > div { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 26px; transition: border-color .25s, transform .35s var(--ease); }
.skills > div:hover { border-color: var(--c1); transform: translateX(8px); }
.skills dt { font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em; margin-bottom: 4px; color: var(--c1); }
.skills dd { margin: 0; color: var(--muted); }

/* Contact */
.contact { padding-bottom: 14vh; }
.mega { display: block; text-decoration: none; color: var(--text); font-size: clamp(3rem, 12vw, 10rem); font-weight: 800; letter-spacing: -.055em; line-height: .95; margin: 20px 0 36px; will-change: transform; }
.mega span { display: block; font-size: clamp(1rem, 2.6vw, 1.7rem); letter-spacing: -.01em; font-weight: 600; margin-top: 18px; color: var(--c1); }
.mega:hover { background: linear-gradient(100deg, var(--c1), var(--c2)); -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent; }
.mega:hover span { -webkit-text-fill-color: var(--muted); }
.links { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 12px; }
.links li { margin: 0; }

.footer { padding: 32px 0 56px; color: var(--muted); font-size: 15px; border-top: 1px solid var(--border); }
.footer p { margin: 0; }

[data-tilt] { will-change: transform; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .nav-inner { padding: 12px 16px; }
  .nav-links { gap: 14px; }
  .container { padding: 0 16px; }
  .hero-inner { padding-left: 16px; padding-right: 16px; }
  .chapter { padding: 12vh 0; }
  .scroll-cue { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .grad, .marquee-track, .scroll-cue span { animation: none; }
  .scroll-cue span { opacity: 1; }
  .panel { position: relative; top: 0; }
}

/* Writing teasers */
.writing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 400px), 1fr)); gap: 18px; margin-top: 36px; }
.write-card { flex: none; text-decoration: none; color: var(--text); }
.write-card h3 { font-size: 1.35rem; color: var(--text); }
.write-card .meta { position: relative; margin-bottom: 10px; }
.more-link { margin: 32px 0 0; }

/* Landing intro (home page only, once per session) */
.intro { display: none; }
.intro-on { overflow: hidden; }
.intro-on .intro { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; background: #040f0b; transition: opacity .6s ease, transform .6s var(--ease), visibility .6s; }
.intro.leave { opacity: 0; transform: scale(1.04); visibility: hidden; pointer-events: none; }
.intro-stage { position: relative; width: min(100vw, calc(100vh * 16 / 9)); width: min(100vw, calc(100svh * 16 / 9)); aspect-ratio: 16 / 9; }
.intro-video { width: 100%; height: 100%; display: block; background: #040f0b; }
.intro-enter { position: absolute; left: 33%; top: 45%; width: 34%; height: 13.5%; border: 0; border-radius: 999px; background: transparent; cursor: pointer; opacity: 0; }
.intro-enter:disabled { cursor: default; pointer-events: none; }
.intro-enter:focus-visible { opacity: 1; outline: 3px solid var(--mint); outline-offset: 4px; }
.intro-skip { position: absolute; right: 24px; top: 20px; z-index: 2; padding: 9px 16px; border-radius: 999px; font: 600 14px/1 system-ui, sans-serif; color: #cdd9d3; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .18); cursor: pointer; transition: background .2s, color .2s; }
.intro-skip:hover { background: rgba(255, 255, 255, .14); color: #fff; }
@media (prefers-reduced-motion: reduce) { .intro-on .intro { display: none; } }