/* aydogana.com/class — matched to the aydogana.com site design tokens */
:root{
  --bg:#fcfcfb; --bg-soft:#f4f3f0; --surface:#ffffff;
  --ink:#16161a; --muted:#6b6870; --faint:#9b98a1;
  --clay:#b4553a; --clay-btn:#b4553a; --clay-btn-hover:#9d4832;
  --border:rgba(22,22,26,0.10); --border-soft:rgba(22,22,26,0.06);
  --tint:#f4f3f0;
  --serif:"Lora",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink)}
body{font-family:var(--sans);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit}

/* ---------- Portal ---------- */
.wrap{max-width:760px;margin:0 auto;padding:76px 24px 104px}
.p-header{margin-bottom:8px}
.kicker{font-size:11.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--faint);margin:0 0 18px;font-weight:500}
h1.portal{font-family:var(--serif);font-size:42px;font-weight:500;line-height:1.08;letter-spacing:-.01em;margin:0 0 14px}
.byline{font-size:15px;color:var(--muted);margin:0}

.course{padding:34px 0;border-top:1px solid var(--border)}
.course:first-of-type{margin-top:34px}
.course:last-of-type{border-bottom:1px solid var(--border)}
.course h2{font-family:var(--serif);font-size:23px;font-weight:500;margin:0 0 2px;letter-spacing:-.005em}
.course h2 .code{color:var(--clay);font-weight:600}
.course .cnote{font-size:13px;color:var(--faint);margin:14px 0 0;font-style:italic}

ul.labs{list-style:none;margin:18px 0 0;padding:0;display:flex;flex-direction:column;gap:2px}
ul.labs a{display:flex;align-items:center;gap:16px;padding:13px 16px;margin:0 -16px;border-radius:12px;text-decoration:none;color:var(--ink);transition:background .12s ease}
ul.labs a:hover{background:var(--bg-soft)}
ul.labs a:hover .title{color:var(--clay)}
ul.labs a:hover .go{opacity:1;transform:translateX(0)}
ul.labs a:hover .chip{border-color:rgba(180,85,58,.35);color:var(--clay)}
.chip{flex:0 0 auto;font-size:11px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);background:var(--bg);border:1px solid var(--border);padding:5px 9px;border-radius:999px;min-width:58px;text-align:center}
.title{font-size:16.5px;font-weight:500}
.go{margin-left:auto;color:var(--clay);opacity:0;transform:translateX(-4px);transition:.12s ease;font-size:17px}

footer.portal{margin-top:44px;font-size:12.5px;color:var(--faint)}

/* ---------- Lab content page ---------- */
.topbar{max-width:820px;margin:0 auto;padding:22px 32px;display:flex;justify-content:space-between;align-items:center;font-size:13px}
.topbar a{color:var(--muted);text-decoration:none;font-weight:500}
.topbar a:hover{color:var(--clay)}
.topbar .tag{color:var(--faint)}
.topbar .tag b{color:var(--clay);font-weight:600}

div.lab{max-width:820px;margin:0 auto;padding:26px 32px 110px}
.prose{max-width:720px;margin:0 auto}
h1.lab{font-family:var(--serif);font-size:37px;font-weight:500;line-height:1.12;letter-spacing:-.01em;margin:8px 0 10px}
.sub{font-family:var(--serif);font-size:18px;font-style:italic;color:var(--muted);margin:0 0 22px;font-weight:400}
.lab .byline{font-size:13.5px;color:var(--muted);margin:0 0 26px}
.lab .byline b{font-weight:600;color:var(--ink)}

table.meta{width:100%;border-collapse:collapse;margin:0 0 30px;font-size:14px}
table.meta td{padding:9px 12px;border-bottom:1px solid var(--border-soft);vertical-align:top}
table.meta td.k{color:var(--muted);font-weight:600;width:120px;white-space:nowrap}
table.meta tr:first-child td{border-top:1px solid var(--border)}

.part{font-family:var(--serif);font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--clay);margin:44px 0 6px}
.prose h2{font-family:var(--serif);font-size:24px;font-weight:500;letter-spacing:-.005em;margin:34px 0 10px}
.prose h3{font-family:var(--sans);font-size:16px;font-weight:600;margin:26px 0 6px}
.prose p{margin:12px 0;color:#26262b}
.prose li{margin:6px 0;color:#26262b}
.prose ul,.prose ol{margin:12px 0;padding-left:22px}
em{font-style:italic}
code{font-family:ui-monospace,"SF Mono",Consolas,monospace;font-size:.88em;background:var(--bg-soft);padding:1px 5px;border-radius:5px;color:#9d4832}

.callout{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px 20px;margin:20px 0;font-size:14.5px}
.callout.abstract{background:var(--bg-soft)}
.callout .lbl{font-weight:700;color:var(--ink)}
.callout.key{background:rgba(180,85,58,0.07);border-color:rgba(180,85,58,0.22)}
.callout.key .lbl{color:var(--clay)}

table.data{width:100%;border-collapse:collapse;margin:20px 0;font-size:13.5px}
table.data th{background:#1b1b1d;color:#fcfcfb;text-align:left;padding:9px 11px;font-weight:600}
table.data td{padding:9px 11px;border-bottom:1px solid var(--border-soft);vertical-align:top}
table.data tr:nth-child(even) td{background:var(--bg-soft)}
.cap{font-size:12.5px;color:var(--faint);font-style:italic;margin:6px 0 0}

.launch{margin:52px auto 0;max-width:720px;padding-top:34px;border-top:1px solid var(--border);text-align:center}
.launch a.btn{display:inline-flex;align-items:center;gap:10px;background:var(--clay-btn);color:#fff;text-decoration:none;font-weight:600;font-size:16px;padding:15px 30px;border-radius:12px;box-shadow:0 1px 2px rgba(120,60,30,.22);transition:background .12s ease,transform .12s ease}
.launch a.btn:hover{background:var(--clay-btn-hover);transform:translateY(-1px)}
.launch-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.launch a.btn.secondary{background:#fff;color:var(--clay);border:1px solid var(--border);box-shadow:none}
.launch a.btn.secondary:hover{background:var(--bg-soft);color:var(--clay-btn-hover);border-color:#e0c4b4}
.sim{width:100%;height:660px;border:1px solid var(--border);border-radius:12px;margin:18px 0;background:#fff}
.launch .hint{font-size:13px;color:var(--muted);margin:14px 0 0}

@media (max-width:560px){
  .wrap{padding:52px 20px 80px}
  h1.portal{font-size:34px}
  h1.lab{font-size:29px}
  div.lab{padding:20px 20px 80px}
  .topbar{padding:18px 20px}
}

/* Download-PDF (browser print) button + print layout */
.topbar .right{display:flex;gap:14px;align-items:center}
.pdfbtn{font-family:var(--sans);font-size:12.5px;font-weight:500;color:var(--muted);background:none;border:1px solid var(--border);border-radius:8px;padding:5px 11px;cursor:pointer;white-space:nowrap}
.pdfbtn:hover{color:var(--clay);border-color:#e0c4b4}
@media print{
  .topbar,.launch,.sim{display:none!important}
  html,body{background:#fff}
  div.lab{padding:0;max-width:100%}
  .prose{max-width:100%}
  .callout,.card,table.data,table.meta{break-inside:avoid}
  a{color:var(--ink);text-decoration:none}
  h1.lab{font-size:30px}
}