:root{
  --bg:#ffffff;--bg-soft:#f6f7fb;--card:#ffffff;--text:#0f172a;--muted:#4b5563;--border:#e5e7eb;
  --accent:#4f46e5;--accent-2:#0891b2;--accent-soft:rgba(79,70,229,.09);--code-bg:#f3f4f8;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.06);
  --radius:14px;--maxw:1080px;
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  color-scheme:light;
}
[data-theme="dark"]{
  --bg:#0b0f19;--bg-soft:#111827;--card:#121a2b;--text:#e5e7eb;--muted:#9ca3af;--border:#1f2937;
  --accent:#818cf8;--accent-2:#22d3ee;--accent-soft:rgba(129,140,248,.12);--code-bg:#0f1626;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
img{max-width:100%;height:auto}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:740px}
h1,h2,h3{line-height:1.2;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.2rem,5vw,3.4rem);font-weight:800}
h2{font-size:clamp(1.6rem,3vw,2.1rem);font-weight:750}
h3{font-size:1.15rem;font-weight:650}
.muted{color:var(--muted)}
.gradient{background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;color:var(--text);letter-spacing:-.02em;display:flex;align-items:center;gap:10px}
.brand img{width:28px;height:28px}
.brand:hover{text-decoration:none}
.nav-links{display:flex;gap:4px;align-items:center;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--muted);padding:8px 12px;border-radius:8px;font-size:.95rem;font-weight:500}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--text);background:var(--accent-soft);text-decoration:none}
.icon-btn{background:transparent;border:1px solid var(--border);color:var(--text);width:38px;height:38px;border-radius:10px;cursor:pointer;display:inline-grid;place-items:center;margin-left:8px}
.icon-btn:hover{background:var(--accent-soft)}
.icon-btn svg{width:18px;height:18px}
.theme-toggle .sun{display:none}
[data-theme="dark"] .theme-toggle .sun{display:block}
[data-theme="dark"] .theme-toggle .moon{display:none}
.menu-btn{display:none}
@media (max-width:720px){
  .menu-btn{display:inline-grid}
  .nav-links{position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--bg);border-bottom:1px solid var(--border);padding:8px 16px 16px;display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px}
}

/* sections */
section{padding:88px 0}
section.alt{background:var(--bg-soft)}
.eyebrow{font-family:var(--mono);font-size:.82rem;color:var(--accent);text-transform:uppercase;letter-spacing:.12em;margin-bottom:10px;display:block}
.section-head{margin-bottom:40px}
.section-head p{max-width:640px}

/* hero */
.hero{padding:96px 0 80px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% -10% auto auto;width:620px;height:620px;background:radial-gradient(closest-side,var(--accent-soft),transparent);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center}
.hero p.lead{font-size:1.2rem;color:var(--muted);max-width:560px}
.typed{font-family:var(--mono);color:var(--accent);font-size:1.05rem;min-height:1.6em}
.typed::after{content:"▍";animation:blink 1s steps(1) infinite;margin-left:2px}
@keyframes blink{50%{opacity:0}}
.avatar-wrap{justify-self:center;position:relative}
.avatar-wrap img{width:280px;height:280px;border-radius:50%;object-fit:cover;border:6px solid var(--card);box-shadow:var(--shadow)}
.avatar-wrap::before{content:"";position:absolute;inset:-14px;border-radius:50%;background:conic-gradient(from 180deg,var(--accent),var(--accent-2),var(--accent));z-index:-1;opacity:.35;filter:blur(18px)}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:10px;font-weight:600;border:1px solid var(--border);color:var(--text);background:var(--card);transition:transform .15s,box-shadow .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
[data-theme="dark"] .btn.primary{color:#0b0f19}
@media (max-width:820px){.hero-grid{grid-template-columns:1fr}.avatar-wrap{order:-1}.avatar-wrap img{width:180px;height:180px}.hero{padding-top:56px}}

/* cards */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:900px){.grid-3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid-2,.grid-3{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .2s,border-color .2s,box-shadow .2s}
a.card{color:inherit;display:block}
a.card:hover{text-decoration:none;transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 45%,var(--border));box-shadow:var(--shadow)}
.card p{margin:.4em 0 0;color:var(--muted);font-size:.96rem}
.card h3{margin-bottom:.3em}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px;padding:0;list-style:none}
.tag{font-size:.75rem;font-family:var(--mono);padding:3px 9px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
a.tag:hover{text-decoration:none;filter:brightness(1.1)}
.meta{font-size:.85rem;color:var(--muted);font-family:var(--mono)}

/* about */
.skills{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
@media (max-width:640px){.skills{grid-template-columns:1fr}}
.skill h3{font-size:1rem}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:.82rem;padding:4px 10px;border-radius:8px;border:1px solid var(--border);background:var(--bg)}
.timeline{list-style:none;margin:0;padding:0;border-left:2px solid var(--border)}
.timeline li{position:relative;padding:0 0 28px 24px}
.timeline li::before{content:"";position:absolute;left:-7px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.timeline .when{font-family:var(--mono);font-size:.8rem;color:var(--muted)}
.timeline h3{margin:.15em 0 .1em}
.about-cols{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:56px}
@media (max-width:820px){.about-cols{grid-template-columns:1fr}}
.interest h3{display:flex;gap:10px;align-items:center}
.interest .num{font-family:var(--mono);color:var(--accent);font-size:.85rem}

/* project cards */
.project .icon{width:42px;height:42px;border-radius:10px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);margin-bottom:14px}
.project .icon svg{width:22px;height:22px}
.project .go{margin-top:16px;font-weight:600;font-size:.9rem;color:var(--accent)}

/* contact */
.contact-card{text-align:center;padding:48px 24px}
.contact-links{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:24px}

footer{border-top:1px solid var(--border);padding:32px 0;color:var(--muted);font-size:.9rem}
footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
footer a{color:var(--muted)}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}
.no-js .reveal{opacity:1;transform:none}

/* blog list */
.blog-head{padding:72px 0 24px}
.search{width:100%;padding:14px 16px 14px 44px;border-radius:12px;border:1px solid var(--border);background:var(--card) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%239ca3af' stroke-width='2' viewBox='0 0 24 24'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E") no-repeat 16px center;color:var(--text);font:inherit}
.search:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 32px}
.filter{font:inherit;font-size:.88rem;padding:6px 14px;border-radius:999px;border:1px solid var(--border);background:var(--card);color:var(--muted);cursor:pointer}
.filter:hover{color:var(--text)}
.filter[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
[data-theme="dark"] .filter[aria-pressed="true"]{color:#0b0f19}
.post-list{display:grid;gap:16px;padding-bottom:80px}
.post-card h2{font-size:1.3rem;margin:.25em 0}
.empty{color:var(--muted);text-align:center;padding:40px 0}

/* article */
.progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2));z-index:60}
.article-head{padding:64px 0 24px}
.article-head h1{font-size:clamp(2rem,4.5vw,2.9rem)}
.article-layout{display:grid;grid-template-columns:minmax(0,740px) 220px;gap:56px;justify-content:center;padding-bottom:40px}
@media (max-width:1060px){.article-layout{grid-template-columns:minmax(0,740px)}.toc{display:none}}
.toc{position:sticky;top:96px;align-self:start;font-size:.88rem}
.toc .label{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.toc ul{list-style:none;padding:0;margin:10px 0 0;border-left:1px solid var(--border)}
.toc ul ul{margin:0;padding-left:12px;border:0}
.toc a{display:block;color:var(--muted);padding:4px 12px;border-left:2px solid transparent;margin-left:-1px}
.toc a:hover,.toc a.active{color:var(--accent);border-color:var(--accent);text-decoration:none}
.prose{font-size:1.08rem;line-height:1.8}
.prose h2{font-size:1.55rem;margin:2em 0 .6em}
.prose h3{font-size:1.2rem;margin:1.6em 0 .5em}
.prose p,.prose ul,.prose ol{margin:0 0 1.2em}
.prose li{margin:.3em 0}
.prose blockquote{margin:1.5em 0;padding:.4em 1.2em;border-left:3px solid var(--accent);color:var(--muted);font-style:italic;background:var(--accent-soft);border-radius:0 10px 10px 0}
.prose code{font-family:var(--mono);font-size:.88em;background:var(--code-bg);padding:.15em .4em;border-radius:6px;border:1px solid var(--border)}
.prose pre{background:var(--code-bg);border:1px solid var(--border);border-radius:12px;padding:18px 20px;overflow-x:auto;font-size:.88rem;line-height:1.6}
.prose pre code{background:none;border:0;padding:0;font-size:inherit}
.prose a{text-decoration:underline;text-underline-offset:3px}
.prose hr{border:0;border-top:1px solid var(--border);margin:2.5em 0}
.prose img{border-radius:12px}
.headerlink{opacity:0;margin-left:.3em;color:var(--muted);text-decoration:none!important;font-weight:400}
.prose h2:hover .headerlink,.prose h3:hover .headerlink,.headerlink:focus{opacity:1}
.share{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:32px 0;padding:20px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.share .btn{padding:8px 14px;font-size:.88rem}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:32px 0 80px}
.pager .next{text-align:right}
.pager .label{font-size:.8rem;font-family:var(--mono);color:var(--muted)}
@media (max-width:640px){.pager{grid-template-columns:1fr}.pager .next{text-align:left}}

/* pygments (light + dark) */
.hl .c,.hl .c1,.hl .cm{color:#6b7280;font-style:italic}
.hl .k,.hl .kn,.hl .kd,.hl .kc,.hl .ow{color:#7c3aed}
.hl .s,.hl .s1,.hl .s2,.hl .sa,.hl .sd,.hl .si{color:#059669}
.hl .nf,.hl .fm{color:#2563eb}
.hl .nc{color:#c2410c}
.hl .mi,.hl .mf{color:#d97706}
.hl .nb,.hl .bp{color:#0891b2}
.hl .nd{color:#db2777}
[data-theme="dark"] .hl .k,[data-theme="dark"] .hl .kn,[data-theme="dark"] .hl .kd,[data-theme="dark"] .hl .kc,[data-theme="dark"] .hl .ow{color:#c4b5fd}
[data-theme="dark"] .hl .s,[data-theme="dark"] .hl .s1,[data-theme="dark"] .hl .s2,[data-theme="dark"] .hl .sa,[data-theme="dark"] .hl .sd,[data-theme="dark"] .hl .si{color:#6ee7b7}
[data-theme="dark"] .hl .nf,[data-theme="dark"] .hl .fm{color:#93c5fd}
[data-theme="dark"] .hl .nc{color:#fdba74}
[data-theme="dark"] .hl .mi,[data-theme="dark"] .hl .mf{color:#fcd34d}
[data-theme="dark"] .hl .nb,[data-theme="dark"] .hl .bp{color:#67e8f9}
[data-theme="dark"] .hl .nd{color:#f9a8d4}
[data-theme="dark"] .hl .c,[data-theme="dark"] .hl .c1,[data-theme="dark"] .hl .cm{color:#8b95a7}

/* project showcase */
.pfilters{margin:-16px 0 28px}
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pcard{padding:0;overflow:hidden;display:flex;flex-direction:column}
.pcard:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--border));box-shadow:var(--shadow);transform:translateY(-3px)}
.pcard-media{aspect-ratio:16/10;background:var(--bg-soft);border-bottom:1px solid var(--border);overflow:hidden}
.pcard-media img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s ease}
.pcard:hover .pcard-media img{transform:scale(1.025)}
.pcard-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.pcard-kicker{font-family:var(--mono);font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--accent-2);margin-bottom:6px}
.pcard h3{font-size:1.1rem}
.pcard p{font-size:.93rem}
.pcard .tags{margin-top:12px}
.pcard-links{margin-top:auto;padding-top:16px;display:flex;gap:16px;flex-wrap:wrap;font-weight:600;font-size:.9rem}
.pcard-links .private{color:var(--muted);font-weight:500;font-family:var(--mono);font-size:.78rem;display:inline-flex;align-items:center;gap:6px}
.pcard-links .private::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--muted);opacity:.6}
.pcard.featured{grid-column:span 3;display:grid;grid-template-columns:1.25fr 1fr}
.pcard.featured .pcard-media{aspect-ratio:auto;position:relative;min-height:320px;border-bottom:0;border-right:1px solid var(--border)}
.pcard.featured .pcard-media{background:#111433}
.pcard.featured .pcard-media img{position:absolute;inset:0;object-fit:contain}
.more-card{background:linear-gradient(160deg,var(--accent-soft),transparent 70%),var(--card)}
.more-list{margin:12px 0 0;padding-left:18px;font-size:.93rem}
.more-list li{margin:6px 0}
.pcard.featured .pcard-body{padding:28px 30px}
.pcard.featured h3{font-size:1.4rem}
.pcard.featured p{font-size:.98rem}
.pcard[hidden]{display:none!important}
@media (max-width:980px){.pgrid{grid-template-columns:repeat(2,1fr)}.pcard.featured{grid-column:span 2}}
@media (max-width:720px){.pgrid{grid-template-columns:1fr}.pcard.featured{grid-column:auto;display:flex}.pcard.featured .pcard-media{aspect-ratio:16/10;min-height:0;border-right:0;border-bottom:1px solid var(--border)}.pcard.featured .pcard-body{padding:20px 22px 22px}}
/* avatar: soften white photo in dark mode */
[data-theme="dark"] .avatar-wrap img{border-color:#1f2a44;filter:brightness(.9) contrast(1.02);box-shadow:0 0 0 1px rgba(255,255,255,.06),0 10px 30px rgba(0,0,0,.45)}