:root {
  --bg: #ffffff;
  --surface: #f5f7fb;
  --fg: #0a1530;
  --muted: #55627a;
  --line: #e1e6ef;
  --accent: #5426b0;
  --accent-fill: #5426b0;
  --accent-soft: #ece6fa;
  --on-accent: #ffffff;
  --code-bg: #f1f4f9;
  --card-bg: #f5f7fb;
  --card-line: #c3cbdb;
  --card-shadow: none;
  --navy: #08142e;
  --navy-surface: #102049;
  --navy-line: #1d2f5c;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "Manrope", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #050b1a; --surface: #0c1630; --fg: #e6ebf5; --muted: #9ba7bf;
    --line: #1a2747; --accent: #b8a2ff; --accent-fill: #6a3fd4; --accent-soft: #231d4a; --code-bg: #0c1630;
    --navy: #0b1a3c; --navy-surface: #132551; --navy-line: #21366a; color-scheme: dark;
    --card-bg: var(--surface); --card-line: var(--line); --card-shadow: none;
  }
}
:root[data-theme="dark"] {
    --bg: #050b1a; --surface: #0c1630; --fg: #e6ebf5; --muted: #9ba7bf;
    --line: #1a2747; --accent: #b8a2ff; --accent-fill: #6a3fd4; --accent-soft: #231d4a; --code-bg: #0c1630;
    --navy: #0b1a3c; --navy-surface: #132551; --navy-line: #21366a; color-scheme: dark;
    --card-bg: var(--surface); --card-line: var(--line); --card-shadow: none;
}
/* dark navy bands: nav, page headers, closing band, footer */
.nav, .hero, .page-head, .p-hero, .band, footer {
  --bg: var(--navy); --surface: var(--navy-surface); --fg: #ffffff; --muted: #b4bfd4;
  --line: var(--navy-line); --accent: #a58cf5; --accent-soft: #2a2f5e; --code-bg: var(--navy-surface);
  background: var(--bg); color: var(--fg);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: var(--body); font-size: 16px; line-height: 1.65; min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
.skip-link { position: absolute; left: 12px; top: -48px; z-index: 20; background: var(--fg); color: var(--bg); padding: 8px 14px; border-radius: 8px; font-weight: 600; text-decoration: none; }
.skip-link:focus { top: 12px; }
.container { max-width: 1080px; margin: 0 auto; padding-inline: 24px; }
.narrow { max-width: 760px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: var(--bg); border-bottom: 1px solid var(--line); }
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.logo { font-family: var(--display); font-weight: 700; font-size: 1.15rem; text-decoration: none; white-space: nowrap; }
.logo { position: relative; padding: 4px 10px; margin-left: -10px; }
.logo::before, .logo::after { content: ""; position: absolute; width: 10px; height: 10px; border: 0 solid var(--accent); }
.logo::before { top: 0; left: 0; border-top-width: 2px; border-left-width: 2px; }
.logo::after { bottom: 0; right: 0; border-bottom-width: 2px; border-right-width: 2px; }
.nav ul { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; font-size: 0.95rem; }
.nav ul a { text-decoration: none; color: var(--muted); padding-block: 4px; border-bottom: 2px solid transparent; }
.nav ul a:hover { color: var(--fg); }
.nav ul a[aria-current="page"] { color: var(--fg); border-bottom-color: var(--accent); }
.nav ul { align-items: center; }
.theme-toggle { display: grid; place-items: center; width: 34px; height: 34px; padding: 0; background: none; border: 1px solid var(--line); border-radius: 8px; color: var(--muted); cursor: pointer; }
.theme-toggle:hover { color: var(--fg); border-color: var(--muted); }
.theme-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.theme-toggle .i-sun, [data-theme="dark"] .theme-toggle .i-moon { display: none; }
[data-theme="dark"] .theme-toggle .i-sun { display: block; }

/* shared type */
h1, h2, h3 { text-wrap: balance; }
h2 { font-family: var(--display); font-weight: 700; font-size: clamp(1.7rem, 4vw, 2.3rem); letter-spacing: -0.02em; line-height: 1.15; margin: 0; }
.eyebrow { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); margin: 0 0 16px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 19px; border-radius: 10px; font-weight: 600; font-size: 0.95rem; text-decoration: none; border: 1.5px solid var(--fg); transition: transform .15s ease, background .15s ease; }
.btn:hover { transform: translateY(-2px); }
.btn.primary { background: var(--accent-fill); color: var(--on-accent); border-color: var(--accent-fill); }
.btn.ghost:hover { background: var(--surface); }
.btn.small { padding: 8px 14px; font-size: 0.88rem; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* home hero */
.hero { padding-block: 80px 64px; }
.hero .container { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 48px; align-items: center; }
.hero h1 { font-family: var(--display); font-weight: 700; font-size: clamp(2.5rem, 6.5vw, 4.4rem); line-height: 1.02; letter-spacing: -0.025em; margin: 0; }
.hero h1 em { font-style: normal; color: var(--accent); display: block; font-weight: 500; font-size: 0.62em; letter-spacing: -0.015em; margin-top: 12px; line-height: 1.15; }
.lede { font-size: 1.1rem; color: var(--muted); max-width: 54ch; margin: 24px 0 32px; }
.portrait { width: 240px; height: 240px; border-radius: 50%; object-fit: cover; border: 6px solid var(--surface); box-shadow: 0 0 0 1px var(--accent), 0 20px 40px -20px rgba(0, 0, 0, .6); }

/* sections */
section.block { padding-block: 64px; border-top: 1px solid var(--line); }
.head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 24px; margin-bottom: 28px; }
.head p { margin: 0; color: var(--muted); }
.head a { color: var(--accent); font-weight: 600; text-decoration: none; }
.head a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* about */
.about { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 56px; }
.about p { margin: 0 0 16px; max-width: 62ch; }
.facts { display: grid; gap: 28px; align-content: start; }
.label { font-family: var(--mono); font-weight: 400; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); margin: 0 0 12px; }
.edu { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.edu li { display: grid; grid-template-columns: 104px minmax(0, 1fr); gap: 12px; }
.edu .yr { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 2px; }
.edu b { font-weight: 600; }
.edu small { display: block; color: var(--muted); font-size: 0.88rem; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.chips li { border: 1px solid var(--line); background: var(--surface); padding: 4px 12px; border-radius: 8px; font-size: 0.88rem; }

/* cards */
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.card { position: relative; background: var(--card-bg); border: 1px solid var(--card-line); box-shadow: var(--card-shadow); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-4px); box-shadow: 0 18px 36px -24px rgba(20, 24, 40, .45); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.thumb { aspect-ratio: 16 / 10; background: var(--accent-soft); overflow: hidden; border-bottom: 1px solid var(--line); }
.thumb img { width: 100%; height: 100%; object-fit: cover; object-position: left top; }
.thumb.fig { background: #ffffff; }
.thumb.fig img { object-fit: contain; object-position: center; padding: 10px; }
.thumb canvas { width: 100%; height: 100%; display: block; }
.thumb.placeholder { display: flex; align-items: flex-end; padding: 16px 18px; background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent-soft) 40%, var(--surface))); }
.thumb.placeholder span { font-family: var(--mono); font-size: 0.75rem; color: var(--accent); }
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 9px; flex: 1; }
.kicker { font-family: var(--mono); font-size: 0.75rem; color: var(--accent); }
.card h3 { font-family: var(--display); font-weight: 700; font-size: 1.25rem; margin: 0; line-height: 1.2; }
.card h3 a { text-decoration: none; }
.card h3 a::after { content: ""; position: absolute; inset: 0; }
.card p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 4px 0 0; padding: 0; }
.tags li { font-size: 0.75rem; font-weight: 500; background: var(--accent-soft); color: var(--fg); padding: 3px 10px; border-radius: 999px; }
.more-link { margin-top: auto; padding-top: 6px; font-weight: 600; font-size: 0.9rem; color: var(--accent); }

/* projects index */
.page-head { padding-block: 64px 40px; margin-bottom: 32px; }
.page-head h1 { font-family: var(--display); font-weight: 700; font-size: clamp(2.3rem, 6vw, 3.6rem); letter-spacing: -0.025em; line-height: 1.05; margin: 0 0 14px; }
.page-head p { color: var(--muted); font-size: 1.1rem; max-width: 60ch; margin: 0; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 0; }
.filters button { font: inherit; font-size: 0.9rem; font-weight: 500; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--muted); cursor: pointer; }
.filters button:hover { color: var(--fg); }
.filters button[aria-pressed="true"] { background: var(--accent-fill); color: var(--on-accent); border-color: var(--accent-fill); }
.group { padding-block: 28px 8px; }
.group h2 { font-size: 1.35rem; margin-bottom: 18px; }

/* project page */
.crumb { display: inline-flex; gap: 6px; font-size: 0.9rem; color: var(--muted); text-decoration: none; margin-bottom: 22px; }
.crumb:hover { color: var(--fg); }
.p-hero { padding-block: 48px 40px; }
.p-hero h1 { font-family: var(--display); font-weight: 700; font-size: clamp(2.3rem, 6vw, 3.8rem); letter-spacing: -0.025em; line-height: 1.04; margin: 0 0 16px; }
.p-hero .summary { font-size: 1.2rem; color: var(--muted); max-width: 60ch; margin: 0 0 28px; }
.p-figure { margin: 0 0 8px; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: var(--surface); }
.p-figure.fig { background: #ffffff; padding: 12px; }
.p-figure.fig img { display: block; margin: 0 auto; width: auto; max-width: min(100%, 760px); max-height: 380px; }
.p-figure canvas { width: 100%; aspect-ratio: 21 / 8; display: block; }
figcaption { font-size: 0.85rem; color: var(--muted); padding: 10px 4px 0; }
.p-layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 56px; padding-block: 40px 72px; align-items: start; }
.p-side { position: sticky; top: 84px; display: grid; gap: 22px; border: 1px solid var(--line); background: var(--surface); border-radius: 14px; padding: 22px; }
.p-side dl { margin: 0; display: grid; gap: 14px; }
.p-side dt { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); }
.p-side dd { margin: 2px 0 0; font-size: 0.93rem; }
.p-side .actions { flex-direction: column; }
.p-side .btn { justify-content: center; }
.prose { min-width: 0; }
.prose h2 { font-size: 1.5rem; margin: 40px 0 12px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-family: var(--display); font-weight: 700; font-size: 1.15rem; margin: 28px 0 8px; }
.prose p, .prose li { max-width: 68ch; }
.prose p { margin: 0 0 14px; }
.prose ul { padding-left: 1.2em; margin: 0 0 16px; }
.prose li { margin-bottom: 6px; }
.prose li::marker { color: var(--accent); }
.prose code { font-family: var(--mono); font-size: 0.86em; background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
.prose pre { font-family: var(--mono); font-size: 0.82rem; line-height: 1.5; background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow-x: auto; margin: 0 0 18px; }
.prose figure { margin: 22px 0; }
.prose figure img { display: block; margin: 0 auto; width: auto; max-width: 100%; max-height: 560px; border: 1px solid var(--line); border-radius: 12px; background: #ffffff; padding: 8px; }
.table-wrap { overflow-x: auto; margin: 0 0 18px; border: 1px solid var(--line); border-radius: 10px; }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.9rem; font-variant-numeric: tabular-nums; }
.prose th, .prose td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-weight: 600; background: var(--code-bg); }
.prose tr:last-child td { border-bottom: 0; }
.callout { border-left: 3px solid var(--accent); background: var(--accent-soft); padding: 14px 18px; border-radius: 0 10px 10px 0; margin: 0 0 18px; }
.callout p:last-child { margin: 0; }
.next { border-top: 1px solid var(--line); padding-block: 36px 56px; }
.next .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px; }
.next a { text-decoration: none; display: grid; gap: 2px; max-width: 46%; }
.next a span { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }
.next a b { font-family: var(--display); font-size: 1.15rem; }
.next a:hover b { color: var(--accent); }
.next a.right { text-align: right; margin-left: auto; }

/* project page: screenshot beside its description */
.prose .view { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr); gap: 28px; align-items: start; margin: 32px 0; }
.prose .view figure { margin: 0; }
.prose .view h3 { margin-top: 4px; }
.prose .view .eyebrow { margin: 0 0 4px; }
@media (max-width: 640px) { .prose .view { grid-template-columns: minmax(0, 1fr); } }

/* live demo embed */
.demo { position: relative; aspect-ratio: 16 / 9; max-width: 100%; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: linear-gradient(135deg, #12151c, #1d2333); margin-top: 8px; }
.demo iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.demo-start { position: absolute; inset: 0; display: grid; place-content: center; gap: 16px; padding: 24px; text-align: center; color: #e8e9ee; }
.demo-start p { margin: 0; max-width: 46ch; color: #c3c7d2; }
.demo-start .actions { justify-content: center; }
.demo-start .btn.ghost { border-color: #e8e9ee; color: #e8e9ee; }
.demo-start .btn.primary { background: #e8e9ee; color: #12151c; border-color: #e8e9ee; }
@media (max-width: 560px) { .demo { aspect-ratio: 3 / 4; } }
.demo.tall { aspect-ratio: auto; height: min(860px, 85vh); }

/* contact */
.contact-wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 48px; padding-block: 24px 80px; align-items: start; }
.contact-wrap.single { grid-template-columns: minmax(0, 640px); }
.contact-list { display: grid; gap: 12px; }
.contact-item { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 20px; border: 1px solid var(--line); background: var(--surface); border-radius: 14px; text-decoration: none; transition: border-color .15s ease, transform .15s ease; }
a.contact-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.contact-item .k { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); display: block; }
.contact-item .v { font-weight: 600; font-size: 1.05rem; overflow-wrap: anywhere; }
.contact-item .arrow { color: var(--accent); font-size: 1.2rem; }
.email-item { position: relative; transition: border-color .15s ease, transform .15s ease; }
.email-item a { text-decoration: none; min-width: 0; }
.email-item a::after { content: ""; position: absolute; inset: 0; border-radius: 14px; }
.email-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.email-item .copy { position: relative; z-index: 1; }
.copy { font: inherit; font-size: 0.85rem; background: var(--surface); color: var(--fg); border: 1px solid var(--line); border-radius: 8px; padding: 6px 12px; cursor: pointer; white-space: nowrap; }
.copy:hover { border-color: var(--fg); }
.contact-note { display: grid; gap: 18px; }
.contact-note p { margin: 0; color: var(--muted); max-width: 52ch; }
.contact-note .portrait { width: 120px; height: 120px; border-width: 4px; }

/* closing band */
.band { border-radius: 20px; padding: 40px 44px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.band h2 { color: var(--fg); }
.band p { margin: 8px 0 0; opacity: .75; }
.band .btn { border-color: var(--fg); color: var(--fg); }
.band .btn.primary { background: var(--accent-fill); color: var(--on-accent); border-color: var(--accent-fill); }

footer { padding-block: 32px; color: var(--muted); font-size: 0.85rem; border-top: 1px solid var(--line); }
footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
footer a { color: var(--muted); text-decoration: none; margin-left: 16px; }
footer a:hover { color: var(--fg); }

@media (max-width: 900px) {
  .grid3 { grid-template-columns: minmax(0, 1fr); }
  .about, .contact-wrap { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .p-layout { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .p-side { position: static; order: -1; }
  .p-side .actions { flex-direction: row; }
}
@media (max-width: 720px) {
  .container { padding-inline: 18px; }
  .nav ul { gap: 16px; font-size: 0.9rem; }
  .hero { padding-block: 44px; }
  .hero .container { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .hero .portrait { width: 132px; height: 132px; grid-row: 1; border-width: 4px; }
  section.block { padding-block: 48px; }
  .band { padding: 28px 22px; }
  .next a { max-width: 100%; }
}
@media (max-width: 400px) { .logo { font-size: 0.92rem; padding-inline: 8px; margin-left: -8px; } .nav .container { padding-inline: 14px; } .nav ul { gap: 8px; font-size: 0.82rem; } .nav li.home { display: none; } .theme-toggle { width: 30px; height: 30px; } }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .card, .contact-item, .email-item { transition: none; }
  .btn:hover, .card:hover, a.contact-item:hover, .email-item:hover { transform: none; }
}

/* TL;DR box at the top of each project page */
.prose .tldr { margin: 0 0 28px; }
.prose .tldr .tldr-label { font-family: var(--mono); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent); margin: 0 0 8px; }
.prose .tldr ul { margin: 0; padding-left: 1.1em; }
.prose .tldr li { margin-bottom: 4px; }
.prose .tldr li:last-child { margin-bottom: 0; }

/* key phrases recruiters scan for */
strong { font-weight: 700; color: var(--fg); background: linear-gradient(transparent 62%, color-mix(in srgb, var(--accent) 22%, transparent) 62%); padding-inline: 1px; }