:root {
  --bg: #07080d;
  --bg-2: #0c0e16;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --text: #eef0f6;
  --muted: #9aa1b5;
  --blue: #4f8cff;
  --violet: #8b5cf6;
  --cyan: #38d6ff;
  --grad: linear-gradient(110deg, #38d6ff 0%, #4f8cff 40%, #8b5cf6 100%);
  --radius: 20px;
  --wrap: 1160px;
  /* SF Pro on Apple devices, Inter (closest match) everywhere else */
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0 0 .5em; line-height: 1.07; letter-spacing: -0.025em; font-weight: 700; }
h2 { font-size: clamp(2rem, 4.4vw, 3.3rem); letter-spacing: -0.035em; }
h3 { font-size: 1.12rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
em {
  font-style: normal;
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
strong { color: #fff; font-weight: 600; }

.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--blue); color: #fff; padding: 8px 12px; border-radius: 8px; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55em;
  padding: .85em 1.45em; border-radius: 999px; border: 1px solid transparent;
  background: var(--grad); color: #fff; font-weight: 600; font-size: .95rem;
  text-decoration: none; cursor: pointer; font-family: inherit;
  transition: transform .2s ease, box-shadow .25s ease, background .2s ease;
  box-shadow: 0 8px 30px -12px rgba(79, 140, 255, .7);
}
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -12px rgba(139, 92, 246, .8); }
.btn--ghost { background: rgba(255,255,255,.03); color: var(--text); border-color: var(--line-2); box-shadow: none; backdrop-filter: blur(8px); }
.btn--ghost:hover { background: rgba(255,255,255,.07); box-shadow: none; }
.btn--sm { padding: .55em 1.1em; font-size: .85rem; }

.eyebrow {
  display: inline-flex; align-items: center; gap: .6em;
  font: 500 .76rem/1.4 var(--mono); letter-spacing: .12em; text-transform: uppercase;
  color: var(--cyan); margin-bottom: 1.2em;
}
.note {
  display: flex; align-items: center; gap: 14px; margin: 0 0 1.6em;
  font-size: 1rem; font-weight: 500; letter-spacing: -0.01em; color: var(--muted);
}
.note--center { justify-content: center; }
.note__line { width: 40px; height: 1px; flex: none; background: linear-gradient(90deg, transparent, var(--blue) 40%, var(--violet)); }
.note__line--flip { transform: scaleX(-1); }

/* Page-wide particle layer sits behind all content */
.page-particles { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
main, .footer { position: relative; z-index: 1; }

.dot { width: 8px; height: 8px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 4px rgba(74,222,128,.15); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(74,222,128,.05); } }

/* Nav */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 50;
  transition: background .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled { background: rgba(7, 8, 13, .72); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-color: var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: .7em; text-decoration: none; font-weight: 600; }
.brand__mark {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px;
  background: var(--grad); color: #fff; font-size: .8rem; font-weight: 700;
}
.nav__menu { display: flex; align-items: center; gap: 1.8rem; list-style: none; margin: 0; padding: 0; }
.nav__menu a:not(.btn) { text-decoration: none; color: var(--muted); font-size: .92rem; transition: color .2s; }
.nav__menu a:not(.btn):hover { color: var(--text); }
.nav__toggle { display: none; background: none; border: 0; padding: 10px; cursor: pointer; }
.nav__toggle span { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: transform .25s; }

/* Hero */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center; padding: 120px 0 90px; overflow: hidden;
}
.hero__canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero__fallback {
  position: absolute; z-index: 0; width: 520px; height: 520px; right: -60px; top: 50%; translate: 0 -50%;
  border-radius: 50%; filter: blur(30px); opacity: .55;
  background: radial-gradient(circle at 35% 35%, #38d6ff, #4f8cff 40%, #8b5cf6 70%, transparent 72%);
  display: none;
}
.no-webgl .hero__fallback { display: block; }
.hero__inner { position: relative; z-index: 2; pointer-events: none; }
.hero__inner a, .hero__inner button { pointer-events: auto; }
.hero h1 { font-size: clamp(2.5rem, 6.2vw, 5rem); max-width: 14ch; letter-spacing: -0.045em; line-height: 1.02; }
.lede { font-size: clamp(1.05rem, 1.6vw, 1.2rem); color: var(--muted); max-width: 54ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 2rem 0 3.2rem; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 220px)); gap: 14px; margin: 0; }
.stats div {
  padding: 18px 20px; border-radius: 16px; border: 1px solid var(--line);
  background: rgba(10, 12, 20, .45); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.stats dt { font: 500 .7rem/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.stats dd { margin: .5em 0 .25em; font-size: 1.55rem; font-weight: 700; letter-spacing: -0.03em; }
.stats p { margin: 0; color: var(--muted); font-size: .85rem; line-height: 1.4; }

.scroll-hint {
  position: absolute; z-index: 2; left: 50%; bottom: 28px; translate: -50% 0;
  width: 26px; height: 42px; border: 1.5px solid var(--line-2); border-radius: 14px;
}
.scroll-hint span { position: absolute; left: 50%; top: 8px; width: 3px; height: 8px; margin-left: -1.5px; border-radius: 2px; background: var(--cyan); animation: wheel 1.8s ease-in-out infinite; }
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* Sections */
.section { padding: clamp(80px, 11vw, 140px) 0; position: relative; }
.section--alt { background: rgba(12, 14, 22, .55); border-block: 1px solid var(--line); }
.section__head { max-width: 760px; margin-bottom: 3.2rem; }
.section__sub { color: var(--muted); font-size: 1.08rem; max-width: 60ch; }

/* Cards */
.grid { display: grid; gap: 18px; }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.card, .project, .skill, .edu__item {
  position: relative; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); transition: border-color .3s, background .3s;
}
.card { padding: 28px 24px; }
.card p { color: var(--muted); font-size: .95rem; margin: 0; }
.card__icon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 1.4rem;
  background: linear-gradient(135deg, rgba(56,214,255,.16), rgba(139,92,246,.2)); border: 1px solid rgba(79,140,255,.3);
}
.card__icon svg { width: 22px; height: 22px; fill: none; stroke: #b9c8ff; stroke-width: 1.7; stroke-linejoin: round; stroke-linecap: round; }

/* 3D tilt */
.tilt { transform-style: preserve-3d; will-change: transform; }
.tilt::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(79,140,255,.16), transparent 45%);
}
.tilt:hover::before { opacity: 1; }
.tilt:hover { border-color: rgba(79,140,255,.35); }

/* About */
.about { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(40px, 7vw, 96px); align-items: center; }
.about__photo { position: relative; border-radius: 28px; }
.about__frame {
  border-radius: 28px; padding: 1.5px; background: var(--grad); box-shadow: 0 40px 80px -40px rgba(79,140,255,.6);
}
.about__frame img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 20%; border-radius: 27px; background: #f4f4f4; }
.about__badge {
  position: absolute; left: -18px; bottom: 28px; transform: translateZ(40px);
  padding: 14px 18px; border-radius: 16px; border: 1px solid var(--line-2);
  background: rgba(12, 14, 22, .8); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  display: flex; flex-direction: column; line-height: 1.3;
}
.about__badge strong { font-size: .92rem; }
.about__badge span { color: var(--muted); font-size: .82rem; }
.about__copy > p:not(.eyebrow) { color: var(--muted); }
.langs { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 1.8rem 0 0; }
.langs li { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
.langs strong { margin-right: .3em; }

/* Timeline */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before { content: ""; position: absolute; left: 228px; top: 10px; bottom: 10px; width: 1px; background: linear-gradient(var(--blue), var(--violet) 60%, transparent); }
.timeline > li { display: grid; grid-template-columns: 200px 1fr; gap: 56px; padding-bottom: 3.4rem; position: relative; }
.timeline > li::before {
  content: ""; position: absolute; left: 223px; top: 8px; width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--blue);
}
.timeline__now::before { background: var(--cyan) !important; border-color: var(--cyan) !important; box-shadow: 0 0 0 5px rgba(56,214,255,.15), 0 0 20px rgba(56,214,255,.6); }
.timeline__meta { text-align: right; display: flex; flex-direction: column; gap: 4px; padding-top: 2px; }
.timeline__date { font: 500 .82rem/1.3 var(--mono); color: var(--text); }
.timeline__where { font-size: .82rem; color: var(--muted); }
.timeline h3 { font-size: 1.35rem; }
.timeline h3 small { display: block; margin-top: .35em; font-size: .95rem; font-weight: 500; letter-spacing: 0; color: var(--cyan); }
.timeline__body ul { margin: 0 0 1.2rem; padding-left: 1.1em; color: var(--muted); }
.timeline__body li { margin-bottom: .55em; font-size: .97rem; }
.timeline__body li::marker { color: var(--violet); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span {
  font: 500 .74rem/1 var(--mono); padding: 6px 10px; border-radius: 8px;
  background: rgba(79,140,255,.08); border: 1px solid rgba(79,140,255,.18); color: #b9c8ff;
}

/* Projects */
.projects { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.project { display: block; padding: 30px; text-decoration: none; }
.project--feature { grid-column: 1 / -1; background: linear-gradient(135deg, rgba(56,214,255,.06), rgba(139,92,246,.08)); }
.project--feature h3 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
.project h3 { font-size: 1.4rem; }
.project p { color: var(--muted); max-width: 70ch; }
.project__top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.4rem; }
.project__kind { font: 500 .72rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--cyan); }
.project__arrow { font-size: 1.2rem; color: var(--muted); transition: transform .3s, color .3s; }
.project:hover .project__arrow { transform: translate(3px, -3px); color: #fff; }

/* Skills */
.skills { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.skill { padding: 22px; }
.skill h3 { font-size: 1rem; margin-bottom: .7em; }
.skill p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.6; }

/* How I work / education */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 7vw, 96px); }
.principles { list-style: none; padding: 0; margin: 2.2rem 0 0; }
.principles li { display: grid; grid-template-columns: 48px 1fr; gap: 12px; padding: 18px 0; border-top: 1px solid var(--line); }
.principles span { font: 500 .85rem/1.8 var(--mono); color: var(--violet); }
.principles h3 { margin-bottom: .3em; }
.principles p { margin: 0; color: var(--muted); font-size: .95rem; }
.edu { display: grid; gap: 14px; margin-top: 2.2rem; }
.edu__item { padding: 24px 26px; }
.edu__item h3 { font-size: 1.2rem; margin: .6em 0 .25em; }
.edu__item p { margin: 0; color: var(--muted); }
.edu__date { font: 500 .76rem/1 var(--mono); color: var(--cyan); }

/* Contact */
.contact { text-align: center; overflow: hidden; }
.contact__glow {
  position: absolute; left: 50%; top: 50%; width: 900px; height: 500px; translate: -50% -50%; pointer-events: none;
  background: radial-gradient(ellipse, rgba(79,140,255,.18), rgba(139,92,246,.1) 40%, transparent 70%);
}
.contact__inner { position: relative; display: flex; flex-direction: column; align-items: center; }
.contact h2 { max-width: 16ch; }
.contact .section__sub { margin-inline: auto; }
.contact__email {
  display: inline-block; margin: 1rem 0 0; font-size: clamp(1.25rem, 3.6vw, 2.3rem); font-weight: 600; letter-spacing: -0.02em;
  text-decoration: none; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  border-bottom: 1px solid rgba(79,140,255,.35); padding-bottom: 4px; word-break: break-all;
}
.contact__cta { justify-content: center; margin: 2.2rem 0 2.4rem; }

.social { display: flex; gap: 10px; list-style: none; margin: 0; padding: 0; }
.social a {
  display: inline-flex; align-items: center; gap: .55em; text-decoration: none; color: var(--muted);
  width: 40px; height: 40px; justify-content: center; border-radius: 12px; border: 1px solid var(--line); transition: color .2s, border-color .2s, transform .2s;
}
.social a:hover { color: #fff; border-color: rgba(79,140,255,.4); transform: translateY(-2px); }
.social svg { width: 18px; height: 18px; fill: currentColor; }
.social--lg a { width: auto; height: auto; padding: 10px 16px; font-size: .9rem; }

.footer { border-top: 1px solid var(--line); padding: 28px 0; }
.footer__inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer p { margin: 0; color: var(--muted); font-size: .88rem; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }
.tilt.reveal.is-in { transition: opacity .8s, transform .25s ease-out, border-color .3s; }

/* Responsive */
@media (max-width: 1000px) {
  .grid--4, .skills { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .nav__toggle { display: block; position: relative; z-index: 60; }
  .nav.is-open .nav__toggle span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .nav.is-open .nav__toggle span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .nav__menu {
    position: fixed; inset: 0; flex-direction: column; justify-content: center; gap: 1.6rem;
    background: rgba(7, 8, 13, .97); backdrop-filter: blur(16px);
    opacity: 0; pointer-events: none; transition: opacity .25s;
  }
  .nav.is-open .nav__menu { opacity: 1; pointer-events: auto; }
  .nav__menu a:not(.btn) { font-size: 1.4rem; color: var(--text); }

  .about, .split { grid-template-columns: 1fr; }
  .about__photo { max-width: 360px; }
  .about__badge { left: 12px; }
  .projects { grid-template-columns: 1fr; }
  .timeline::before { left: 5px; }
  .timeline > li { grid-template-columns: 1fr; gap: 10px; padding-left: 32px; }
  .timeline > li::before { left: 0; }
  .timeline__meta { text-align: left; flex-direction: row; gap: 12px; flex-wrap: wrap; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stats div:last-child { grid-column: 1 / -1; }
  .grid--4, .skills { grid-template-columns: 1fr; }
  .project { padding: 24px; }
  .hero { padding-top: 110px; }
  .scroll-hint { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .dot, .scroll-hint span { animation: none; }
}