:root{
  --bg:#F7F7F5;--fg:#1F2933;--muted:#52606D;--line:#E1E4E8;
  --card:#EEF0F2;--card-line:#DDE1E6;--card-hover:#FFFFFF;--card-text:#3E4C59;
  --chip:#E6E9ED;--accent:#334E68;--accent-fg:#F7F7F5;--pill-line:#CBD2D9;
  --underline:#BCC4CC;--logo-bg:#1F2933;--logo-fg:#F7F7F5;
}
:root[data-theme="dark"]{
  --bg:#14181C;--fg:#E6E9ED;--muted:#9AA5B1;--line:#2A3138;
  --card:#1C2228;--card-line:#2A3138;--card-hover:#222A31;--card-text:#BCC4CC;
  --chip:#252C33;--accent:#9FB3C8;--accent-fg:#14181C;--pill-line:#3E4954;
  --underline:#52606D;--logo-bg:#E6E9ED;--logo-fg:#14181C;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:'Inter',system-ui,sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
h1,h2,h3,p{margin:0}
.container{width:100%;max-width:880px;margin:0 auto;padding:0 32px}

/* header */
.site-header{border-bottom:1px solid var(--line)}
.site-header .container{padding-top:10px;padding-bottom:10px;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.logo{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:var(--logo-bg);color:var(--logo-fg);border-radius:10px;font-weight:600;font-size:17px;letter-spacing:-0.02em}
.nav{display:flex;align-items:center;gap:24px;font-size:14px;color:var(--muted);flex-wrap:wrap}
.nav a:hover{color:var(--fg)}
#theme-toggle{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:0;background:transparent;color:inherit;cursor:pointer}

/* sections */
main{display:flex;flex-direction:column}
section{padding:112px 0 0;display:flex;flex-direction:column;gap:12px}
section.hero{padding-top:96px;gap:20px}
section:last-child{padding-bottom:120px}
h2{font-weight:600;font-size:22px;letter-spacing:-0.02em}
.section-intro{color:var(--muted);font-size:16px;max-width:34em;line-height:1.6;text-wrap:pretty}

/* hero */
.eyebrow{font-size:15px;color:var(--muted)}
h1{font-weight:600;font-size:clamp(36px,5vw,48px);line-height:1.08;letter-spacing:-0.03em}
.tagline{margin-top:4px;max-width:26em;font-weight:500;font-size:22px;line-height:1.35;letter-spacing:-0.01em;text-wrap:pretty}
.lead{max-width:34em;font-size:17px;line-height:1.6;color:var(--muted);text-wrap:pretty}
.actions{display:flex;align-items:center;gap:28px;flex-wrap:wrap;margin-top:12px}
.btn1{display:inline-flex;align-items:center;min-height:52px;padding:0 28px;background:var(--accent);color:var(--accent-fg);border-radius:8px;font-weight:500;font-size:16px}
.btn1:hover{filter:brightness(.92)}
.link{display:inline-flex;align-items:center;gap:8px;min-height:52px;font-weight:500;font-size:16px}
.link:hover{color:var(--accent)}

/* projects */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(320px,100%),1fr));gap:16px;margin-top:12px}
.card{display:flex;flex-direction:column;gap:12px;padding:28px;background:var(--card);border:1px solid var(--card-line);border-radius:12px}
.card:hover{border-color:var(--accent);background:var(--card-hover)}
.card h3{font-weight:600;font-size:19px;letter-spacing:-0.01em}
.card p{margin-bottom:12px;font-size:16px;line-height:1.6;color:var(--card-text);text-wrap:pretty}
.card .link{margin-top:auto;min-height:44px;color:var(--accent);font-size:15px}

/* writing */
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0 12px;font-size:13px}
.chips span,.tag{padding:5px 12px;background:var(--chip);border-radius:6px;font-size:13px}
.writing-list{border-top:1px solid var(--line);display:flex;flex-direction:column}
.writing-list .row{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;border-bottom:1px solid var(--line);flex-wrap:wrap;padding:8px 0}
.writing-list .row a{flex:1 1 360px;font-size:17px;line-height:1.4}
.writing-list .tag{padding:4px 12px;color:var(--muted)}
.ul{text-decoration:underline;text-decoration-color:var(--underline);text-underline-offset:4px}
.ul:hover{color:var(--accent);text-decoration-color:var(--accent)}

/* about */
#about{gap:24px}
.prose{display:flex;flex-direction:column;gap:18px;max-width:36em;font-size:18px;line-height:1.7}
.prose p{text-wrap:pretty}

/* contact */
#contact{gap:20px}
#contact p{font-size:18px}
.pill{display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 22px;border:1px solid var(--pill-line);border-radius:8px;font-size:16px;font-weight:500}
.pill:hover{border-color:var(--fg)}

/* experience */
.timeline{list-style:none;padding:0;margin:12px 0 0;border-left:2px solid var(--line)}
.timeline li{position:relative;padding:0 0 32px 24px}
.timeline li::before{content:"";position:absolute;left:-7px;top:.5rem;width:12px;height:12px;border-radius:50%;background:var(--accent)}
.timeline h3{font-weight:600;font-size:19px;letter-spacing:-0.01em;margin:2px 0}
.timeline p{color:var(--muted);font-size:16px}
.dates{font-size:13px;color:var(--muted)}

/* footer */
footer{border-top:1px solid var(--line);margin-top:0}
footer .container{padding-top:24px;padding-bottom:24px;font-size:14px;color:var(--muted)}

.cta{display:inline-flex;align-items:center;gap:8px;min-height:52px;font-weight:500;font-size:16px}

/* animated underline on hover */
.cta,.link,.nav a{position:relative}
.cta::after,.link::after,.nav a::after{content:"";position:absolute;left:0;right:0;height:1.5px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .25s ease}
.cta::after{bottom:10px}
.link::after{bottom:8px}
.nav a{padding:4px 0}
.nav a::after{bottom:0}
.cta:hover::after,.link:hover::after,.nav a:hover::after{transform:scaleX(1)}
@media (prefers-reduced-motion:reduce){.cta::after,.link::after,.nav a::after{transition:none}}