:root{
  --bg:#ffffff;
  --bg-alt:#f6f6f4;
  --text:#1c1c1a;
  --text-dim:#5c5c57;
  --border:#e4e3df;
  --accent:#55554f;
  --accent-bg:#ececea;
  --radius:6px;
  --sidebar-w:220px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#151513;
    --bg-alt:#1d1d1b;
    --text:#e9e8e3;
    --text-dim:#a3a29c;
    --border:#333331;
    --accent:#c9c9c4;
    --accent-bg:#2a2a28;
  }
}
*{box-sizing:border-box;}
html, body{
  margin:0;
  height:100%;
}
body{
  font-family:"Segoe UI", system-ui, -apple-system, Helvetica, Arial, sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
}
a{color:var(--accent); text-decoration:none;}
a:hover{text-decoration:underline;}

.layout{display:flex; min-height:100vh; align-items:stretch;}

/* Sidebar */
aside.sidebar{
  width:var(--sidebar-w);
  flex-shrink:0;
  background:#000;
  position:sticky;
  top:0;
  align-self:flex-start;
  height:100vh;
  overflow-y:auto;
  padding:28px 0 0;
  display:flex;
  flex-direction:column;
}

.social-links{
  margin-top:auto;
  display:flex;
  justify-content:center;
  gap:20px;
  padding:20px 20px 16px;
}
.social-links a{color:#8a8a86;}
.social-links a:hover{color:#fff;}
.social-links svg{width:26px; height:26px; fill:currentColor; display:block;}
.brand{
  display:block;
  padding:0 20px 20px;
  font-weight:600;
  font-size:1.05rem;
  color:var(--text);
  border-bottom:1px solid var(--border);
  margin-bottom:12px;
}
.brand:hover{text-decoration:none;}
.brand small{display:block; font-weight:400; color:var(--text-dim); font-size:0.8rem; margin-top:2px;}

nav.sidenav{display:flex; flex-direction:column; padding:0 12px;}
nav.sidenav a{
  color:#fff;
  font-size:0.92rem;
  padding:9px 12px;
  border-radius:var(--radius);
  margin-bottom:2px;
}
nav.sidenav a:hover{background:#262626; text-decoration:none; color:#fff;}
nav.sidenav a.active{background:#3a3a3a; color:#e6e6e6; font-weight:600;}

/* Main content */
main{
  flex:1;
  min-width:0;
  max-width:820px;
  padding:56px 40px 0;
  display:flex;
  flex-direction:column;
}
h1.page-title{font-size:1.6rem; margin:0 0 28px;}
h1{font-size:2rem; margin:0 0 6px;}
h2{
  font-size:1.05rem;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--accent);
  margin:0 0 28px;
}
h3{font-size:1.05rem; margin:0 0 2px;}

.tagline{color:var(--text-dim); font-size:1.05rem; margin:0 0 20px;}
.lede{max-width:60ch;}

.hero{display:flex; gap:24px; align-items:flex-start;}
.avatar{
  width:96px; height:96px;
  border-radius:50%;
  object-fit:cover;
  flex-shrink:0;
  border:1px solid var(--border);
}

.stats{display:flex; gap:32px; margin-top:28px; flex-wrap:wrap;}
.stat b{display:block; font-size:1.5rem;}
.stat span{color:var(--text-dim); font-size:0.85rem;}

.highlight{
  margin-top:32px;
  padding:18px 20px;
  background:var(--accent-bg);
  border-radius:var(--radius);
  border:1px solid var(--border);
}
.highlight .label{font-size:0.75rem; text-transform:uppercase; letter-spacing:0.08em; color:var(--accent); font-weight:600;}

/* Career timeline */
.timeline{list-style:none; margin:0; padding:0;}
.timeline li{
  padding:0 0 22px 20px;
  border-left:2px solid var(--border);
  position:relative;
  margin-left:4px;
}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{
  content:"";
  position:absolute; left:-6px; top:4px;
  width:10px; height:10px; border-radius:50%;
  background:var(--accent);
}
.role-date{font-size:0.82rem; color:var(--text-dim);}
.role-title{font-weight:600;}
.role-org{color:var(--text-dim);}

/* Education */
.edu-item{margin-bottom:18px;}
.edu-item .role-date{display:block;}

.research-card{
  padding:16px 18px;
  background:var(--bg-alt);
  border-radius:var(--radius);
  margin-top:18px;
}
.tags{display:flex; flex-wrap:wrap; gap:6px; margin-top:10px;}
.tag{
  font-size:0.75rem;
  background:var(--accent-bg);
  color:var(--accent);
  padding:3px 9px;
  border-radius:999px;
  border:1px solid var(--border);
}

/* Games grid */
.grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:16px;}
.card{
  background:var(--bg-alt);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
}
.card h3{margin-bottom:6px;}
.card p{margin:6px 0; font-size:0.9rem; color:var(--text-dim);}
.card .meta{font-size:0.8rem; color:var(--text-dim);}

/* Projects (grouped/collapsible) */
details.employer{
  border:1px solid var(--border);
  border-radius:var(--radius);
  margin-bottom:10px;
  background:var(--bg-alt);
  overflow:hidden;
}
details.employer summary{
  cursor:pointer;
  padding:14px 18px;
  font-weight:600;
  list-style:none;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
details.employer summary::-webkit-details-marker{display:none;}
details.employer summary::after{
  content:"+";
  color:var(--accent);
  font-weight:400;
  font-size:1.2rem;
}
details.employer[open] summary::after{content:"–";}
.proj-list{padding:0 18px 16px;}
.proj{padding:14px 0; border-top:1px solid var(--border);}
.proj:first-child{border-top:none;}
.proj h4{margin:0 0 2px; font-size:0.98rem;}
.proj .role-date{display:block; margin-bottom:6px;}
.proj p{margin:6px 0; font-size:0.9rem; color:var(--text-dim);}
.proj .links{font-size:0.85rem; margin-top:6px;}
.proj .links a{margin-right:12px;}

/* Skills */
.skill-group{margin-bottom:22px;}
.skill-group h3{font-size:0.92rem; color:var(--text-dim); font-weight:600; text-transform:uppercase; letter-spacing:0.05em; margin-bottom:10px;}
.pills{display:flex; flex-wrap:wrap; gap:8px;}
.pill{
  font-size:0.85rem;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--border);
  background:var(--bg-alt);
}

footer{
  margin-top:auto;
  text-align:center;
  padding:16px 20px;
  color:var(--text-dim);
  font-size:0.8rem;
}

/* Mobile: sidebar collapses to a top bar */
@media (max-width:760px){
  .layout{flex-direction:column;}
  aside.sidebar{
    width:100%;
    height:auto;
    position:static;
    border-right:none;
    border-bottom:1px solid var(--border);
    padding:16px 0;
  }
  nav.sidenav{flex-direction:row; flex-wrap:wrap; padding:0 12px;}
  main{padding:32px 20px; max-width:none;}
  .hero{flex-direction:column; align-items:center; text-align:center;}
  .lede{max-width:none;}
}