/* CUDA Training Blog — beige design system (muted) */
:root{
  --bg:#EFEBE1;          /* base beige — desaturated */
  --bg-soft:#E7E2D6;
  --paper:#F5F1E6;       /* card */
  --paper-deep:#D9D3C4;
  --ink:#221E18;
  --ink-soft:#4B4236;
  --muted:#8A8172;
  --line:#CAC3B3;
  --line-soft:#D8D2C3;
  --accent:#9A5A2B;      /* rust (unchanged — intentional) */
  --accent-2:#B77250;
  --good:#5F7B3A;
  --warn:#A85A2A;
  --code-bg:#2A241C;
  --code-fg:#ECE7DA;
  --code-dim:#A79E8B;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:'Pretendard','Apple SD Gothic Neo','Noto Sans KR',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;font-feature-settings:'ss01','ss02';-webkit-font-smoothing:antialiased;line-height:1.6;word-break:keep-all;overflow-wrap:break-word}
a{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(154,90,43,.25)}
a:hover{border-bottom-color:var(--accent)}
.mono{font-family:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-feature-settings:'ss01'}

/* layout */
.wrap{max-width:760px;margin:0 auto;padding:72px 28px 140px}
.wrap-wide{max-width:1120px;margin:0 auto;padding:72px 28px 140px}

/* top bar */
.topbar{display:flex;justify-content:space-between;align-items:baseline;padding:28px 36px;border-bottom:1px solid var(--line-soft);background:var(--bg)}
.topbar .brand{font-weight:700;letter-spacing:.02em;font-size:15px}
.topbar .brand em{font-style:normal;color:var(--accent);font-weight:700}
.topbar nav{display:flex;gap:22px;font-size:13px;color:var(--muted)}
.topbar nav a{color:var(--muted);border:none}
.topbar nav a:hover{color:var(--ink)}

/* article header */
.eyebrow{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin:0 0 18px}
.eyebrow .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:10px;vertical-align:middle}
h1.title{font-size:44px;line-height:1.15;margin:0 0 18px;letter-spacing:-.015em;font-weight:700;text-wrap:balance}
h1.title.kicker{font-size:52px}
.dek{font-size:18px;color:var(--ink-soft);margin:0 0 28px;line-height:1.55;text-wrap:pretty}
.meta{display:flex;flex-wrap:wrap;gap:18px;font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);padding:18px 0;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);margin:0 0 40px}
.meta span strong{color:var(--ink);font-weight:500}

/* prose */
.prose h2{font-size:24px;margin:56px 0 14px;letter-spacing:-.01em;font-weight:700;padding-top:8px}
.prose h2::before{content:"§ ";color:var(--accent);font-weight:400}
.prose h3{font-size:17px;margin:32px 0 10px;font-weight:700;color:var(--ink)}
.prose p{margin:0 0 16px;font-size:16px;color:var(--ink-soft)}
.prose p strong{color:var(--ink)}
.prose ul,.prose ol{padding-left:22px;color:var(--ink-soft)}
.prose li{margin:4px 0}
.prose hr{border:none;border-top:1px dashed var(--line);margin:48px 0}
.prose blockquote{margin:24px 0;padding:16px 22px;border-left:3px solid var(--accent);background:var(--paper);color:var(--ink);font-size:16px;border-radius:0 6px 6px 0}

/* code */
pre{background:var(--code-bg);color:var(--code-fg);padding:20px 22px;border-radius:10px;overflow-x:auto;font-family:'JetBrains Mono',monospace;font-size:13px;line-height:1.55;margin:18px 0;border:1px solid #3a3428}
pre .c{color:var(--code-dim)}
pre .k{color:#E7B369}
pre .s{color:#C6B98A}
pre .n{color:#E8DCB8}
code{background:var(--paper-deep);color:var(--ink);padding:2px 6px;border-radius:4px;font-family:'JetBrains Mono',monospace;font-size:.88em}
pre code{background:none;padding:0;color:inherit;font-size:inherit}

/* tables */
.tbl{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;font-family:'JetBrains Mono',monospace;background:var(--paper);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.tbl th,.tbl td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--line-soft)}
.tbl th{background:var(--bg-soft);font-weight:600;color:var(--ink);font-size:12px;letter-spacing:.04em;text-transform:uppercase}
.tbl td.num,.tbl th.num{text-align:right;font-variant-numeric:tabular-nums}
.tbl tr:last-child td{border-bottom:none}
.tbl td strong{color:var(--accent)}

/* callout */
.callout{background:var(--paper);border:1px solid var(--line);border-radius:10px;padding:18px 22px;margin:22px 0}
.callout .label{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--accent);margin-bottom:6px}
.callout p{margin:0;color:var(--ink)}

.kv{display:grid;grid-template-columns:max-content 1fr;gap:6px 18px;font-family:'JetBrains Mono',monospace;font-size:13px;margin:20px 0;padding:18px 22px;background:var(--paper);border:1px solid var(--line);border-radius:10px}
.kv dt{color:var(--muted)}
.kv dd{margin:0;color:var(--ink)}

/* footer nav between articles */
.artnav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:64px;padding-top:28px;border-top:1px solid var(--line-soft)}
.artnav a{display:block;padding:16px 20px;background:var(--paper);border:1px solid var(--line);border-radius:10px;color:var(--ink);border-bottom:1px solid var(--line)}
.artnav a:hover{background:var(--paper-deep)}
.artnav .lbl{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:4px}
.artnav .nxt{text-align:right}

/* index */
.hero{padding:60px 0 40px}
.hero h1{font-size:64px;line-height:1.05;margin:0 0 20px;letter-spacing:-.02em;font-weight:700;max-width:900px}
.hero .sub{font-size:20px;color:var(--ink-soft);max-width:680px;line-height:1.5}
.hero .stats{margin-top:40px;display:flex;flex-wrap:wrap;gap:36px;font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.hero .stats b{display:block;color:var(--ink);font-size:20px;font-weight:700;margin-bottom:2px;font-family:'Pretendard',sans-serif}

.toc{margin-top:60px}
.toc .sec-label{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin:40px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--line-soft)}
.card{display:grid;grid-template-columns:80px 1fr max-content;gap:24px;padding:22px 4px;border-bottom:1px solid var(--line-soft);color:var(--ink);border:none;transition:background .15s}
.card:hover{background:var(--paper)}
.card .num{font-family:'JetBrains Mono',monospace;font-size:13px;color:var(--accent);padding-top:4px}
.card h3{margin:0 0 6px;font-size:20px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}
.card .tag{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--muted);padding-top:6px;white-space:nowrap}

/* page chrome */
footer.bot{max-width:760px;margin:0 auto;padding:40px 28px 80px;font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);display:flex;justify-content:space-between;border-top:1px solid var(--line-soft)}

/* ============ PODCAST EPISODE PAGES ============ */
.pod-hero{padding:56px 0 44px;border-bottom:1px solid var(--line)}
.pod-kick{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:14px;margin-bottom:24px}
.pod-kick .stack{color:var(--accent);font-weight:600}
.pod-kick .epn{padding:3px 8px;border:1px solid var(--line);border-radius:3px;color:var(--ink)}
.pod-hero h1{font-size:56px;line-height:1.05;margin:0 0 22px;letter-spacing:-.02em;font-weight:700;text-wrap:balance;max-width:880px}
.pod-hero .dek{font-size:18px;max-width:700px;margin:0 0 36px}

/* hosts strip */
.hosts{display:grid;grid-template-columns:1fr 1fr;gap:14px;max-width:640px;margin:32px 0 0}
.host{display:flex;gap:14px;align-items:center;padding:14px 16px;background:var(--paper);border:1px solid var(--line);border-radius:10px}
.host .av{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-family:'JetBrains Mono',monospace;font-size:15px;font-weight:600;flex-shrink:0;color:var(--paper)}
.host.sam .av{background:#2E4A3F}
.host.jensen .av{background:#5A3A1F}
.host .role{font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:1px}
.host .nm{font-weight:600;font-size:14px;color:var(--ink)}
.host .sub{font-size:11px;color:var(--muted);margin-top:1px}

/* chapters strip */
.chapters{margin:32px 0 0;padding:22px 0 0;border-top:1px solid var(--line-soft)}
.chapters-head{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);margin-bottom:16px;display:flex;justify-content:space-between}
.chapter-list{display:grid;gap:1px;background:var(--line-soft);border:1px solid var(--line-soft);border-radius:8px;overflow:hidden;font-family:'JetBrains Mono',monospace;font-size:12px}
.chapter-list a{display:grid;grid-template-columns:58px 22px 1fr max-content;gap:14px;padding:11px 16px;background:var(--paper);color:var(--ink);border:none;align-items:baseline}
.chapter-list a:hover{background:var(--bg-soft)}
.chapter-list .ts{color:var(--muted)}
.chapter-list .ix{color:var(--accent)}
.chapter-list .ti{color:var(--ink);font-family:'Pretendard',sans-serif;font-size:14px;font-weight:600}
.chapter-list .dur{color:var(--muted)}

/* act block */
.act{padding:88px 0 40px;border-top:1px solid var(--line-soft);scroll-margin-top:40px}
.act:first-of-type{border-top:none}
.act-head{margin-bottom:22px}
.act-head .num{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:14px;margin-bottom:14px;flex-wrap:wrap}
.act-head .num .n{color:var(--accent);font-weight:600;font-size:13px}
.act-head .num b{font-family:'Pretendard',sans-serif;font-weight:600;color:var(--ink);font-size:13px;letter-spacing:.04em;text-transform:none}
.act-head h2{font-size:38px;line-height:1.1;margin:0;letter-spacing:-.02em;font-weight:700;text-wrap:balance;max-width:900px}
.act-head h2::before{content:none}
.act-lede{font-size:17px;color:var(--ink-soft);margin:0 0 28px;max-width:640px}

/* dialogue */
.dlg{display:grid;grid-template-columns:60px 1fr;gap:16px;margin:14px 0;align-items:baseline}
.dlg .who{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding-top:4px}
.dlg.sam .who{color:#2E4A3F}
.dlg.jensen .who{color:#9A5A2B}
.dlg .ln{font-size:15.5px;line-height:1.55;color:var(--ink-soft)}
.dlg .ln strong{color:var(--ink)}
.dlg .ln em{font-style:normal;background:linear-gradient(transparent 62%,rgba(154,90,43,.2) 62%)}

.pull{font-size:26px;line-height:1.3;margin:28px 0;padding:20px 0;color:var(--ink);letter-spacing:-.01em;font-weight:600;text-wrap:balance;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pull .by{display:block;font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);margin-top:10px;font-weight:400}

/* visual frame */
.viz{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:28px;margin:24px 0;position:relative}
.viz.dark{background:var(--code-bg);border-color:#3a3428;color:var(--code-fg)}
.viz.dark .viz-cap{color:#A99B7A}
.viz-cap{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted);margin-bottom:18px;display:flex;justify-content:space-between}
.viz-title{font-size:15px;font-weight:600;color:var(--ink);margin:0 0 14px}
.viz.dark .viz-title{color:var(--code-fg)}

/* two-column act layout */
.act-body{display:grid;grid-template-columns:1fr;gap:40px}
.act-body.split{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}
.act-body.split.rev{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}

/* metric bars (Act 1 cost of distance) */
.bars{display:grid;gap:8px;font-family:'JetBrains Mono',monospace;font-size:12px}
.bars .row{display:grid;grid-template-columns:130px 1fr 90px;gap:12px;align-items:center}
.bars .lbl{color:var(--ink-soft)}
.bars .bar{height:20px;background:var(--bg-soft);border-radius:3px;position:relative;overflow:hidden}
.bars .bar span{display:block;height:100%;background:var(--accent);border-radius:3px}
.bars .bar.sml span{background:var(--good)}
.bars .val{color:var(--ink);text-align:right;font-weight:600}

/* tile grid for matmul ordering */
.tile-grid{display:inline-grid;gap:2px;padding:8px;background:var(--bg-soft);border-radius:4px;font-family:'JetBrains Mono',monospace;font-size:10px}
.tile-grid div{width:28px;height:28px;display:grid;place-items:center;background:var(--paper-deep);color:var(--ink-soft);border-radius:2px}
.tile-grid div.hi{background:var(--accent);color:var(--paper)}
.tile-grid div.mid{background:var(--accent-2);color:var(--paper)}

/* HBM trip diagram */
.hbm{display:grid;grid-template-columns:1fr;gap:10px;font-family:'JetBrains Mono',monospace;font-size:12px}
.hbm .kstep{display:grid;grid-template-columns:70px 1fr 90px;gap:10px;padding:10px 14px;border:1px solid var(--line);background:var(--bg-soft);border-radius:6px;align-items:center}
.hbm .kstep.fused{background:var(--paper);border-color:var(--accent);border-width:1px}
.hbm .kstep .k{color:var(--accent);font-weight:600}
.hbm .kstep .io{color:var(--muted)}
.hbm .tally{padding:10px 14px;background:transparent;font-weight:600;color:var(--ink);display:flex;justify-content:space-between;font-size:13px}

/* act footer */
.lesson-ref{font-family:'JetBrains Mono',monospace;font-size:11px;color:var(--muted);letter-spacing:.1em;margin-top:20px;padding-top:16px;border-top:1px dashed var(--line-soft)}
.lesson-ref a{color:var(--accent);border:none}
.lesson-ref a:hover{border-bottom:1px solid var(--accent)}

/* outro */
.outro{padding:80px 0 40px;border-top:1px solid var(--line)}
.outro h2{font-size:32px;margin:0 0 20px;font-weight:700;letter-spacing:-.015em}
.outro h2::before{content:none}

/* mini code block inside viz */
pre.mini{margin:10px 0 0;padding:14px 18px;font-size:12px;border-radius:8px}

/* SVG defaults */
svg .ln{stroke:var(--line);stroke-width:1;fill:none}
svg .lnd{stroke:var(--line);stroke-width:1;fill:none;stroke-dasharray:3,3}
svg .acc{stroke:var(--accent);stroke-width:1.5;fill:none}
svg .lbl{font-family:'JetBrains Mono',monospace;font-size:10px;fill:var(--ink-soft)}
svg .lbl-hi{font-family:'JetBrains Mono',monospace;font-size:10px;fill:var(--accent);font-weight:600}
svg .box-paper{fill:var(--paper);stroke:var(--line)}
svg .box-deep{fill:var(--paper-deep);stroke:var(--line)}
svg .box-acc{fill:var(--accent);stroke:var(--accent)}
svg .tx{fill:var(--ink);font-family:'Pretendard',sans-serif;font-size:12px}
svg .tx-l{fill:var(--ink);font-family:'Pretendard',sans-serif;font-size:14px;font-weight:600}

@media (max-width:640px){
  .hosts{grid-template-columns:1fr}
  .act-body.split,.act-body.split.rev{grid-template-columns:1fr}
  .pod-hero h1{font-size:36px}
  .act-head h2{font-size:26px}
  .act-head .num b{font-size:14px}
  .pull{font-size:20px}

  .wrap{padding:40px 20px 100px}
  h1.title{font-size:32px}
  h1.title.kicker{font-size:36px}
  .hero h1{font-size:40px}
  .card{grid-template-columns:54px 1fr}
  .card .tag{display:none}
  .topbar{padding:18px 20px}
  .topbar nav{gap:14px}
}

/* ============ LANG SWITCHER ============ */
.lang-switch{display:inline-flex;border:1px solid var(--line);background:var(--bg-soft);overflow:hidden;border-radius:3px;margin-left:4px}
.lang-switch button{background:transparent;color:var(--muted);border:none;padding:3px 9px;font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.15em;font-weight:700;cursor:pointer;transition:all .15s ease}
.lang-switch button:hover:not(.active){color:var(--ink);background:var(--paper-deep)}
.lang-switch button.active{background:var(--ink);color:var(--paper)}
.lang-switch button + button{border-left:1px solid var(--line)}
[data-lang][hidden]{display:none !important}