/* ─────────────────────────── tokens ─────────────────────────── */
:root {
  --bg:        #07090e;
  --bg-2:      #0a0d14;
  --surface:   rgba(255,255,255,.028);
  --surface-2: rgba(255,255,255,.055);
  --line:      rgba(255,255,255,.09);
  --line-2:    rgba(255,255,255,.16);
  --ink:       #eaf0f7;
  --ink-2:     #98a5b6;
  --ink-3:     #6d7c96;   /* 4.7:1 on --bg — do not lighten further */
  --accent:    #35d2f0;
  --accent-2:  #8b5cf6;
  --on-accent: #05080d;   /* text sitting on a solid --accent fill */
  --glow-a:    rgba(53,210,240,.16);
  --grain:     .035;

  --display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --body:    "Inter", ui-sans-serif, system-ui, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;

  --ease: cubic-bezier(.22,1,.36,1);
  --pad: clamp(1.25rem, 5vw, 5rem);
  --maxw: 1180px;
}

[data-theme="light"] {
  --bg:        #f6f6f3;
  --bg-2:      #ffffff;
  --surface:   rgba(9,13,20,.028);
  --surface-2: rgba(9,13,20,.055);
  --line:      rgba(9,13,20,.11);
  --line-2:    rgba(9,13,20,.2);
  --ink:       #0c1118;
  --ink-2:     #4c596b;
  --ink-3:     #5f6a77;   /* 4.9:1 on --bg */
  --accent:    #0b6d8d;   /* 5.2:1 on --bg, so it is safe as small text too */
  --accent-2:  #6132e0;
  --on-accent: #ffffff;
  --glow-a:    rgba(11,109,141,.12);
  --grain:     .022;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: clamp(.95rem, .3vw + .9rem, 1.05rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .5s var(--ease), color .5s var(--ease);
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -.028em;
  line-height: 1.08;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }

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

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

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

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.skip {
  position: fixed; top: -100px; left: 1rem; z-index: 200;
  padding: .7rem 1rem; border-radius: 10px;
  background: var(--accent); color: var(--bg); font-weight: 600;
}
.skip:focus { top: 1rem; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* the mono micro-label used across every section */
.label {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0;
}

/* ───────────────────── texture + cursor glow ───────────────────── */
.grain {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: var(--grain);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.glow {
  position: fixed; top: 0; left: 0; z-index: 0; pointer-events: none;
  width: 560px; height: 560px; margin: -280px 0 0 -280px;
  background: radial-gradient(circle, var(--glow-a), transparent 62%);
  opacity: 0;
  transition: opacity .6s var(--ease);
  will-change: transform;
}
body.has-pointer .glow { opacity: 1; }

/* ─────────────────────────── nav ─────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: var(--line);
}

.nav__in {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: .85rem var(--pad);
  display: flex; align-items: center; gap: 1.5rem;
}

.nav__mark {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--mono); font-weight: 500;
  letter-spacing: .12em; font-size: .85rem;
}
.nav__dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent);
  animation: pulse 2.6s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 55%, transparent); }
  70%  { box-shadow: 0 0 0 9px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.nav__links {
  margin-left: auto;
  display: flex; gap: 1.6rem;
  font-size: .85rem; color: var(--ink-2);
}
.nav__links a { position: relative; transition: color .25s; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -5px; height: 1px;
  background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }
.nav__links a.is-active { color: var(--ink); }

.toggle {
  margin-left: .25rem;
  display: grid; place-items: center;
  width: 38px; height: 38px; padding: 0;
  border: 1px solid var(--line); border-radius: 11px;
  background: var(--surface); color: var(--ink);
  cursor: pointer;
  transition: border-color .25s, background .25s, transform .25s var(--ease);
}
.toggle:hover { border-color: var(--line-2); transform: translateY(-1px); }
.toggle svg {
  grid-area: 1/1; width: 17px; height: 17px;
  fill: none; stroke: currentColor; stroke-width: 1.7;
  stroke-linecap: round;
  transition: opacity .3s, transform .4s var(--ease);
}
.toggle__sun  { opacity: 0; transform: rotate(-60deg) scale(.6); }
.toggle__moon { opacity: 1; }
[data-theme="light"] .toggle__sun  { opacity: 1; transform: none; }
[data-theme="light"] .toggle__moon { opacity: 0; transform: rotate(60deg) scale(.6); }

@media (max-width: 720px) {
  .nav__links { display: none; }
  .toggle { margin-left: auto; }
}

/* ─────────────────────────── hero ─────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  padding: 7rem 0 5rem;
  overflow: hidden;
}

.hero__canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  opacity: .95;
  -webkit-mask-image: radial-gradient(120% 85% at 70% 35%, #000 25%, transparent 78%);
          mask-image: radial-gradient(120% 85% at 70% 35%, #000 25%, transparent 78%);
}

.hero__in { position: relative; z-index: 2; }

.byline { display: flex; align-items: center; gap: .9rem; margin-bottom: 2.4rem; }
.byline__img {
  width: 56px; height: 56px; border-radius: 50%;
  padding: 2px; background: var(--bg);
  box-shadow: 0 0 0 1.5px var(--accent), 0 0 26px -6px var(--accent);
}
.byline__name {
  font-family: var(--display); font-weight: 600;
  font-size: 1.05rem; letter-spacing: -.01em;
}
.byline__meta { font-family: var(--mono); font-size: .76rem; color: var(--ink-3); }

.hero__title {
  font-size: clamp(2.5rem, 7.2vw, 5.4rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -.04em;
  max-width: 17ch;
}
.hero__title .w {
  display: inline-block; overflow: hidden;
  padding-bottom: .14em; margin-bottom: -.14em;
}
.hero__title .w > i {
  display: inline-block; font-style: normal;
  transform: translateY(115%);
  animation: rise .95s var(--ease) forwards;
  animation-delay: calc(var(--i) * 55ms + 150ms);
}
.hero__title .accent > i {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
@keyframes rise { to { transform: none; } }

.hero__lead {
  margin-top: 1.8rem;
  max-width: 56ch;
  color: var(--ink-2);
  font-size: clamp(1rem, .4vw + .95rem, 1.15rem);
}

.hero__cta { display: flex; flex-wrap: wrap; gap: .65rem; margin-top: 2.2rem; }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .7rem 1.15rem;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface);
  font-size: .88rem; font-weight: 500;
  transition: transform .3s var(--ease), border-color .3s, background .3s, color .3s;
}
.btn:hover { transform: translateY(-2px); border-color: var(--line-2); background: var(--surface-2); }
.btn span { transition: transform .3s var(--ease); }
.btn:hover span { transform: translateX(3px); }
.btn--solid {
  background: var(--accent); color: var(--on-accent); border-color: transparent; font-weight: 600;
}
.btn--solid:hover { background: var(--accent); filter: brightness(1.1); }

.stats {
  display: grid; gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  margin: 3.6rem 0 0;
  border: 1px solid var(--line); border-radius: 16px;
  background: var(--line);
  overflow: hidden;
}
.stat { padding: 1.15rem 1.25rem; background: var(--bg); }
.stat dt {
  font-family: var(--mono); font-size: .68rem;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3);
}
.stat dd {
  margin: .3rem 0 0;
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
}

.scrollcue {
  position: absolute; bottom: 1.6rem; left: 50%; z-index: 2;
  translate: -50% 0;
  width: 22px; height: 36px;
  border: 1px solid var(--line-2); border-radius: 12px;
}
.scrollcue span {
  position: absolute; top: 7px; left: 50%; translate: -50% 0;
  width: 3px; height: 7px; border-radius: 2px; background: var(--accent);
  animation: cue 1.9s var(--ease) infinite;
}
@keyframes cue {
  0%, 100% { opacity: 0; transform: translateY(0); }
  35%      { opacity: 1; }
  75%      { opacity: 0; transform: translateY(12px); }
}
@media (max-width: 720px) { .scrollcue { display: none; } }

/* ───────────────────────── sections ───────────────────────── */
.sec { position: relative; z-index: 2; padding: clamp(5rem, 11vw, 9rem) 0; }

.sechead { margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.sechead h2 {
  margin-top: .8rem;
  font-size: clamp(1.85rem, 4.2vw, 3rem);
  max-width: 20ch;
}

.tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.tags li {
  font-family: var(--mono); font-size: .7rem;
  padding: .28rem .6rem;
  border: 1px solid var(--line); border-radius: 999px;
  color: var(--ink-2);
  background: var(--surface);
  transition: border-color .25s, color .25s;
}
.card:hover .tags li, .proj:hover .tags li { border-color: var(--line-2); }

/* ───────────────────────── focus cards ───────────────────────── */
.cards {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
}

.card, .proj {
  position: relative; overflow: hidden; isolation: isolate;
  padding: 1.6rem;
  border: 1px solid var(--line); border-radius: 18px;
  background: var(--surface);
  transition: transform .4s var(--ease), border-color .4s;
}
.card::before, .proj::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(380px circle at var(--mx,50%) var(--my,50%),
              color-mix(in srgb, var(--accent) 13%, transparent), transparent 65%);
  opacity: 0; transition: opacity .4s;
}
.card:hover, .proj:hover { transform: translateY(-4px); border-color: var(--line-2); }
.card:hover::before, .proj:hover::before { opacity: 1; }

.card__no {
  display: inline-block;
  font-family: var(--mono); font-size: .72rem;
  letter-spacing: .1em;
  padding: .25rem .55rem; margin-bottom: 1.1rem;
  border-radius: 7px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
}
.card h3 { font-size: 1.3rem; margin-bottom: .7rem; }
.card p  { color: var(--ink-2); font-size: .94rem; margin-bottom: 1.2rem; }

/* ───────────────────────── timeline ───────────────────────── */
.timeline { position: relative; padding-left: 0; }
.timeline::before,
.timeline::after {
  content: ""; position: absolute; top: .5rem; bottom: .5rem; width: 1px;
  left: 0;
}
.timeline::before { background: var(--line); }
.timeline::after {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  transform: scaleY(var(--p, 0)); transform-origin: top;
  box-shadow: 0 0 14px -2px var(--accent);
}

.tl {
  position: relative;
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0 2.5rem;
  padding: 0 0 3.4rem 2.5rem;
}
.tl:last-child { padding-bottom: 0; }

.tl__node {
  position: absolute; left: 0; top: .55rem;
  width: 9px; height: 9px; border-radius: 50%;
  translate: -4px 0;
  background: var(--bg);
  border: 1.5px solid var(--line-2);
  transition: border-color .5s, box-shadow .5s, background .5s;
}
.tl.in .tl__node {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 14%, transparent);
}

.tl__when {
  font-family: var(--mono); font-size: .74rem;
  letter-spacing: .06em; color: var(--ink-3);
  padding-top: .2rem;
}
.tl__body h3 {
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  display: flex; flex-wrap: wrap; align-items: baseline; gap: .1rem .7rem;
}
.tl__body h3 span {
  font-family: var(--body); font-size: .9rem; font-weight: 500;
  letter-spacing: 0; color: var(--accent);
}
.tl__where {
  font-family: var(--mono); font-size: .72rem;
  color: var(--ink-3); margin-top: .35rem;
}
.tl__lede { margin-top: .9rem; color: var(--ink-2); max-width: 62ch; }

.bullets { margin: 1.1rem 0 1.3rem; display: grid; gap: .55rem; max-width: 66ch; }
.bullets li {
  position: relative; padding-left: 1.3rem;
  font-size: .92rem; color: var(--ink-2);
}
.bullets li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: 6px; height: 1px; background: var(--accent);
}

.edu {
  margin-top: 3rem; padding-top: 1.6rem;
  border-top: 1px solid var(--line);
  color: var(--ink-2); font-size: .92rem;
  display: flex; flex-wrap: wrap; align-items: baseline; gap: .3rem 1rem;
}

@media (max-width: 820px) {
  .tl { grid-template-columns: 1fr; gap: .5rem; padding-left: 1.6rem; }
  .tl__when { padding-top: 0; }
}

/* ───────────────────────── projects ───────────────────────── */
/* 340px min lands on two columns at max width, so the four narrow cards
   sit as a clean 2×2 under the wide one instead of 3 + 1 orphan. */
.projects {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
}
.proj--wide { grid-column: 1 / -1; }

.proj__no {
  font-family: var(--mono); font-size: .75rem;
  color: var(--ink-3); margin-bottom: 1rem;
}
.proj h3 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); }
.proj__tag {
  font-family: var(--mono); font-size: .76rem;
  color: var(--accent); margin: .4rem 0 .9rem;
}
.proj > p:not(.proj__no):not(.proj__tag) {
  color: var(--ink-2); font-size: .94rem;
  margin-bottom: 1.2rem; max-width: 60ch;
}

/* ───────────────────────── stack ───────────────────────── */
.grid-stack {
  display: grid; gap: 2.2rem 2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.stackgrp h3 {
  font-size: .8rem; font-family: var(--mono); font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: .9rem;
}

.marquee {
  margin-top: clamp(3rem, 7vw, 5rem);
  overflow: hidden;
  border-block: 1px solid var(--line);
  padding: 1.1rem 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.marquee__track {
  display: flex; align-items: center; gap: 1.4rem;
  width: max-content;
  animation: slide 46s linear infinite;
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.2rem, 2.6vw, 1.9rem);
  letter-spacing: -.02em;
  color: var(--ink-3);
}
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track span:nth-child(4n+1) { color: var(--ink); }
@keyframes slide { to { transform: translateX(-50%); } }

/* ───────────────────────── contact ───────────────────────── */
.sec--contact { padding-bottom: clamp(4rem, 8vw, 7rem); }

.bigcta {
  margin: 1rem 0 0;
  font-size: clamp(3rem, 12vw, 8rem);
  font-weight: 700; letter-spacing: -.05em;
  background: linear-gradient(100deg, var(--ink) 20%, var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.contact__lead { margin-top: 1.4rem; max-width: 54ch; color: var(--ink-2); }

.contact__links { margin-top: 2.6rem; display: grid; border-top: 1px solid var(--line); }
.biglink {
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 1.15rem .2rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--display); font-weight: 500;
  font-size: clamp(1.05rem, 2.6vw, 1.5rem);
  letter-spacing: -.02em;
  transition: color .3s, padding-left .35s var(--ease);
}
.biglink span { color: var(--ink-3); transition: transform .35s var(--ease), color .3s; }
.biglink:hover { color: var(--accent); padding-left: 1rem; }
.biglink:hover span { color: var(--accent); transform: translate(4px, -4px); }

/* ───────────────────────── footer ───────────────────────── */
.foot {
  position: relative; z-index: 2;
  border-top: 1px solid var(--line);
  padding: 2rem 0;
  font-size: .8rem; color: var(--ink-3);
}
.foot__in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .6rem; }
.foot__note { font-family: var(--mono); font-size: .74rem; }

/* ───────────────────────── reveal ───────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: var(--d, 0ms);
}
[data-reveal].in { opacity: 1; transform: none; }

/* ───────────────────────── reduced motion ───────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__title .w > i { transform: none; }
  .glow { display: none; }
}