@import url('https://fonts.cdnfonts.com/css/aptos');

:root{
  --bg:#0b0b0c; --panel:#131316; --ink:#e8eaed; --muted:#9aa0a6; --accent:#7fd3a6; --accent-2:#6ea8fe;
  --header-h:64px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Aptos','Aptos Display',system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
  font-size:16px;
  line-height:1.5;
}
a{color:var(--accent-2);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

.site-header{position:sticky;top:0;z-index:10;background:rgba(19,19,22,0.9);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid #222}
.site-header .wrap{display:flex;align-items:center;gap:16px;height:var(--header-h)}
.brand{font-weight:800;letter-spacing:0.5px;color:var(--ink);font-size:1.25rem;padding:6px 10px;border:1px solid #2a2a2a;border-radius:8px;background:#16161a}
.nav{margin-left:auto;display:flex;gap:16px}
.nav a{padding:6px 8px;border-radius:6px}
.nav a.active,.nav a:hover{background:#17171a}

.hero{padding:56px 0 28px;border-bottom:1px solid #1f1f22}
.hero.slim{padding:40px 0 16px}
.lede{color:var(--muted);max-width:70ch}

.cta-row{display:flex;gap:12px;margin-top:16px}
.btn{display:inline-block;padding:10px 14px;border:1px solid #2a2a2a;border-radius:8px;background:#17171a;color:var(--ink)}
.btn.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));border-color:transparent;color:#0a0a0a;font-weight:600}
.btn:hover{transform:translateY(-1px);}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}
.card{background:#121214;border:1px solid #222;border-radius:12px;padding:18px}
.card h2{margin:0 0 8px 0}

.layout{display:grid;grid-template-columns:280px 1fr;gap:20px;margin-top:20px}
.sidebar{position:sticky;top:calc(var(--header-h) + 20px);height:calc(100vh - 160px);overflow:auto;border-right:1px solid #1f1f22;padding-right:12px}
.sidebar summary{cursor:pointer;color:var(--muted)}
.sidebar ul{list-style:none;margin:8px 0 0 0;padding:0}
.sidebar li{margin:4px 0}
.content .viewer .file-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
pre.code{background:#0e0e10;border:1px solid #1f1f22;border-radius:10px;padding:12px;overflow:auto;max-height:70vh}

.site-footer{padding:28px 0;border-top:1px solid #1f1f22;margin-top:28px;color:var(--muted)}

@media (max-width: 860px){
  .grid-2{grid-template-columns:1fr}
  .layout{grid-template-columns:1fr}
  .sidebar{position:relative;height:auto;border-right:none;padding-right:0}
}

/* ---------- Home v3 fold fits in viewport ---------- */
.fold{min-height:calc(100vh - var(--header-h));display:grid;grid-template-rows:auto auto auto auto;align-content:center;justify-items:center;gap:12px;padding:14px 0 10px}
.name-white{margin:0;font-size:clamp(24px,5vw,36px);color:#fff;letter-spacing:.3px;text-align:center}
.git-handle{margin:0;display:flex;align-items:center;justify-content:center;gap:8px;font-size:clamp(14px,2.2vw,18px);color:var(--muted)}
.git-handle a{color:inherit}
.git-handle img{height:22px;width:22px;display:block}
.portrait{margin:0}
.portrait img{display:block;height:clamp(220px,38vh,420px);width:auto;border-radius:14px;border:1px solid #2a2a2a;object-fit:cover;box-shadow:0 10px 40px rgba(0,0,0,.35)}
.affiliation{display:flex;align-items:center;justify-content:center;gap:18px;width:auto;flex-wrap:wrap}
.utk-logo{height:68px;width:auto;object-fit:contain}
.depts{font-size:clamp(14px,2.2vw,18px);line-height:1.25;color:var(--ink);text-align:center}
.blocks{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:12px;width:min(860px,100%)}
.block{display:grid;place-items:center;padding:14px 18px;border-radius:12px;border:1px solid #2a2a2a;background:#121216;text-decoration:none;color:var(--ink);font-weight:600;letter-spacing:.2px;min-width:0}
.block:hover{text-decoration:none;transform:translateY(-1px)}
@media (max-width:680px){.blocks{grid-auto-flow:row}.utk-logo{height:52px}.git-handle{font-size:16px}}