/* Base + component classes, lifted verbatim from the Absentia DX User Guide */

    *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth;scroll-padding-top:40px}
  body{
    font-family:'Inter', system-ui, sans-serif;
    background:var(--bg);
    color:var(--text);
    font-size:16px;
    line-height:1.65;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
    overflow-x:hidden;
  }
  ::selection{background:var(--cyan);color:#111}
  a{color:var(--cyan-soft);text-decoration:none;border-bottom:1px solid rgba(33,212,255,.3);transition:all .15s}
  a:hover{border-bottom-color:var(--cyan)}
  h1,h2,h3,h4{font-family:'Space Grotesk', sans-serif;letter-spacing:-.01em;line-height:1.15;color:#fff}
  code, .mono{font-family:'JetBrains Mono', monospace;font-size:.88em}

  /* ─── Top bar ─── */
  .topbar{
    position:sticky;top:0;z-index:50;
    background:rgba(10,12,17,.82);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--line);
    height:58px;
    display:flex;align-items:center;
    padding:0 28px;
  }
  .brand{display:flex;align-items:center;gap:14px;font-family:'Space Grotesk';font-weight:600;font-size:15px;letter-spacing:.02em}
  .brand-mark{width:28px;height:28px;border-radius:7px;background:url('../assets/abdx-icon.png') center/cover no-repeat;flex:none}
  .brand small{color:var(--text-mute);font-weight:400;letter-spacing:.08em;text-transform:uppercase;font-size:11px;margin-left:4px}
  .topbar-right{margin-left:auto;display:flex;gap:22px;font-size:13px;color:var(--text-dim)}
  .topbar-right span{display:flex;align-items:center;gap:6px}
  .topbar-right .ver{color:var(--cyan);font-family:'JetBrains Mono';font-size:12px}
  .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan)}

  /* ─── Layout ─── */
  .shell{display:grid;grid-template-columns:280px 1fr;max-width:var(--max);margin:0 auto}
  aside.toc{
    position:sticky;top:58px;
    height:calc(100vh - 58px);
    overflow-y:auto;
    padding:42px 22px 60px 28px;
    border-right:1px solid var(--line);
  }
  aside.toc::-webkit-scrollbar{width:6px}
  aside.toc::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:3px}
  .toc-label{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-mute);margin:24px 0 10px 10px;font-weight:600}
  .toc-label:first-child{margin-top:0}
  .toc a{
    display:flex;align-items:baseline;gap:10px;
    padding:7px 10px;border-radius:7px;
    color:var(--text-dim);border:none;
    font-size:13.5px;line-height:1.35;
    transition:all .15s;
  }
  .toc a .num{font-family:'JetBrains Mono';font-size:11px;color:var(--text-mute);min-width:22px}
  .toc a:hover{color:var(--text);background:var(--surface)}
  .toc a.active{color:var(--cyan);background:rgba(33,212,255,.07)}
  .toc a.active .num{color:var(--cyan)}

  main{padding:0 0 160px;min-width:0}

  /* ─── Hero ─── */
  .hero{
    position:relative;
    padding:120px 72px 140px;
    border-bottom:1px solid var(--line);
    overflow:hidden;
    background:
      linear-gradient(180deg, rgba(7,9,13,.72) 0%, rgba(7,9,13,.85) 55%, rgba(7,9,13,.95) 100%),
      url('../assets/hero-bg.jpg') center/cover no-repeat;
  }
  .hero::before{
    content:'';position:absolute;inset:0;pointer-events:none;
    background:
      radial-gradient(ellipse 70% 50% at 20% 100%, rgba(33,212,255,.18), transparent 60%),
      radial-gradient(ellipse 60% 40% at 85% 85%, rgba(255,45,127,.14), transparent 60%);
  }
  .hero-spectro{display:none}
  .hero-bars{
    position:absolute;left:0;right:0;bottom:0;height:180px;
    background-image:
      linear-gradient(90deg, transparent, transparent);
    display:flex;align-items:flex-end;gap:2px;padding:0 8px;opacity:.35;
  }
  .hero-bars i{display:block;flex:1;background:linear-gradient(to top, #21d4ff, #ff2d7f 80%, transparent);border-radius:1px 1px 0 0}
  .eyebrow{
    display:inline-flex;align-items:center;gap:10px;
    font-family:'JetBrains Mono';font-size:12px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--cyan);
    padding:6px 12px;border:1px solid rgba(33,212,255,.4);border-radius:100px;
    background:rgba(33,212,255,.06);
    margin-bottom:28px;position:relative;z-index:2;
  }
  .eyebrow::before{content:'';width:6px;height:6px;background:var(--cyan);border-radius:50%;box-shadow:0 0 10px var(--cyan)}
  .hero h1{
    font-size:clamp(56px, 7vw, 104px);
    font-weight:500;
    letter-spacing:-.03em;
    line-height:.96;
    max-width:14ch;
    position:relative;z-index:2;
  }
  .hero h1 em{font-style:normal;color:var(--cyan);font-weight:500}
  .hero-lede{
    margin-top:32px;max-width:58ch;
    font-size:20px;line-height:1.55;color:var(--text-dim);font-weight:300;
    position:relative;z-index:2;
  }
  .hero-meta{
    margin-top:56px;display:grid;grid-template-columns:repeat(4, max-content);
    gap:48px;position:relative;z-index:2;
  }
  .hero-meta div{border-left:1px solid var(--line-2);padding-left:18px}
  .hero-meta dt{font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-mute);margin-bottom:8px}
  .hero-meta dd{font-family:'Space Grotesk';font-size:18px;color:var(--text);font-weight:500}

  /* ─── Sections ─── */
  section.chapter{padding:96px 72px;border-bottom:1px solid var(--line)}
  section.chapter.tight{padding-top:60px}
  section.chapter:last-of-type{border-bottom:none}

  .ch-head{display:flex;align-items:baseline;gap:24px;margin-bottom:44px}
  .ch-num{
    font-family:'JetBrains Mono';font-size:13px;color:var(--cyan);
    letter-spacing:.14em;font-weight:500;
    padding-top:8px;min-width:60px;
  }
  .ch-head h2{font-size:44px;font-weight:500;letter-spacing:-.02em;max-width:22ch}
  .ch-head .ch-sub{color:var(--text-mute);font-size:14px;margin-top:6px;font-family:'JetBrains Mono';letter-spacing:.04em}

  .prose{max-width:72ch}
  .prose p{margin-bottom:18px;color:var(--text-dim);font-size:16px}
  .prose p strong{color:var(--text)}
  .prose h3{
    font-size:22px;font-weight:500;margin-top:48px;margin-bottom:14px;
    color:#fff;letter-spacing:-.005em;
  }
  .prose h3 .ord{font-family:'JetBrains Mono';color:var(--cyan);font-size:14px;margin-right:10px;font-weight:500}
  .prose h4{
    font-size:13px;font-weight:600;margin-top:32px;margin-bottom:10px;
    color:var(--cyan-soft);letter-spacing:.12em;text-transform:uppercase;font-family:'Inter';
  }
  .prose ul{margin:6px 0 22px 0;padding:0;list-style:none}
  .prose ul li{
    color:var(--text-dim);padding:7px 0 7px 22px;position:relative;font-size:15.5px;line-height:1.6;
  }
  .prose ul li::before{
    content:'';position:absolute;left:4px;top:17px;width:8px;height:1px;background:var(--cyan);
  }
  .prose ul li strong{color:var(--text)}

  /* two column layout */
  .two-col{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
  .three-col{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

  /* ─── Figure ─── */
  figure.shot{
    margin:32px 0 8px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    overflow:hidden;
    position:relative;
  }
  figure.shot .shot-bar{
    height:30px;background:var(--surface-2);border-bottom:1px solid var(--line);
    display:flex;align-items:center;padding:0 12px;gap:8px;
  }
  figure.shot .shot-bar b{width:10px;height:10px;border-radius:50%;background:var(--line-2);display:block}
  figure.shot .shot-bar b:nth-child(1){background:#ff5f57}
  figure.shot .shot-bar b:nth-child(2){background:#febc2e}
  figure.shot .shot-bar b:nth-child(3){background:#28c840}
  figure.shot .shot-bar span{margin-left:auto;font-family:'JetBrains Mono';font-size:11px;color:var(--text-mute);letter-spacing:.08em}
  figure.shot img{display:block;width:100%;height:auto}
  figure.shot figcaption{
    padding:14px 18px;font-size:13px;color:var(--text-mute);
    border-top:1px solid var(--line);background:var(--bg-2);
    font-family:'JetBrains Mono';letter-spacing:.02em;
  }
  figure.plain{
    margin:32px 0 8px;border:1px solid var(--line);border-radius:var(--radius);
    overflow:hidden;background:var(--bg-2);
  }
  figure.plain img{display:block;width:100%;height:auto}
  figure.plain figcaption{padding:14px 18px;font-size:13px;color:var(--text-mute);font-family:'JetBrains Mono';letter-spacing:.02em}

  /* ─── Card ─── */
  .card{
    border:1px solid var(--line);
    background:linear-gradient(180deg, var(--surface), var(--bg-2));
    border-radius:var(--radius);
    padding:22px 24px;
  }
  .card h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:10px;letter-spacing:.01em}
  .card p{font-size:14px;color:var(--text-dim);line-height:1.55}
  .card .card-kbd{margin-top:14px;display:inline-flex;align-items:center;gap:6px}
  .tool-card{
    border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:22px;
    display:flex;flex-direction:column;gap:10px;
    transition:all .2s;
  }
  .tool-card:hover{border-color:var(--line-2);transform:translateY(-1px)}
  .tool-card .tag{
    font-family:'JetBrains Mono';font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--cyan);padding:3px 9px;border:1px solid rgba(33,212,255,.35);border-radius:100px;align-self:flex-start;
    background:rgba(33,212,255,.05);
  }
  .tool-card .tag.pink{color:var(--pink);border-color:rgba(255,45,127,.4);background:rgba(255,45,127,.05)}
  .tool-card .tag.teal{color:var(--cyan-soft);border-color:rgba(127,229,255,.35);background:rgba(54,214,195,.04)}
  .tool-card h3{font-size:17px;font-weight:500;color:#fff;letter-spacing:-.005em;margin-top:4px}
  .tool-card p{font-size:14px;color:var(--text-dim);line-height:1.55}

  /* ─── Kbd ─── */
  kbd{
    display:inline-block;font-family:'JetBrains Mono';font-size:11.5px;
    padding:3px 8px;border-radius:5px;
    background:var(--surface-2);border:1px solid var(--line-2);
    color:var(--text);
    box-shadow:0 1px 0 var(--line);
    letter-spacing:.02em;
  }
  kbd+kbd{margin-left:2px}
  .kbd-sep{color:var(--text-mute);margin:0 6px;font-size:12px}

  /* ─── Callouts ─── */
  .callout{
    margin:28px 0;padding:18px 22px 18px 58px;
    border-radius:10px;position:relative;
    border:1px solid var(--line);
    background:linear-gradient(180deg, rgba(33,212,255,.05), transparent);
    font-size:14.5px;line-height:1.6;color:var(--text-dim);
  }
  .callout::before{
    content:'NOTE';position:absolute;left:20px;top:19px;
    font-family:'JetBrains Mono';font-size:10.5px;letter-spacing:.16em;font-weight:600;
    color:var(--cyan);
  }
  .callout.warn{background:linear-gradient(180deg, rgba(255,45,127,.06), transparent)}
  .callout.warn::before{content:'WARN';color:var(--pink)}
  .callout.tip{background:linear-gradient(180deg, rgba(127,229,255,.06), transparent)}
  .callout.tip::before{content:'TIP';color:var(--cyan-soft)}
  .callout strong{color:var(--text)}

  /* ─── Steps ─── */
  ol.steps{counter-reset:step;list-style:none;margin:20px 0 28px;padding:0}
  ol.steps li{
    counter-increment:step;
    padding:14px 0 14px 54px;
    border-top:1px solid var(--line);
    position:relative;
    color:var(--text-dim);font-size:15.5px;line-height:1.55;
  }
  ol.steps li:last-child{border-bottom:1px solid var(--line)}
  ol.steps li::before{
    content:counter(step, decimal-leading-zero);
    position:absolute;left:4px;top:14px;
    font-family:'JetBrains Mono';font-size:12px;color:var(--cyan);letter-spacing:.05em;
  }
  ol.steps li strong{color:var(--text);display:block;margin-bottom:3px;font-weight:500;font-family:'Space Grotesk';font-size:16px}

  /* ─── Spec row ─── */
  .spec{
    display:grid;grid-template-columns:180px 1fr;gap:24px;
    padding:18px 0;border-top:1px solid var(--line);
  }
  .spec:last-child{border-bottom:1px solid var(--line)}
  .spec dt{font-family:'JetBrains Mono';font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-mute);padding-top:2px}
  .spec dd{color:var(--text-dim);font-size:15px}
  .spec dd strong{color:var(--text)}

  /* ─── Table ─── */
  table.manual{width:100%;border-collapse:collapse;margin:28px 0;font-size:14px}
  table.manual th,table.manual td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line)}
  table.manual thead th{font-family:'JetBrains Mono';font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--text-mute);font-weight:600;background:var(--bg-2)}
  table.manual td{color:var(--text-dim)}
  table.manual td strong{color:var(--text)}
  table.manual td:first-child{font-family:'JetBrains Mono';font-size:13px;color:var(--cyan)}
  table.manual tr:hover td{background:rgba(33,212,255,.02)}

  /* ─── Pills ─── */
  .pill{
    display:inline-block;font-family:'JetBrains Mono';font-size:11px;
    padding:2px 9px;border-radius:100px;letter-spacing:.08em;text-transform:uppercase;
    background:var(--surface-2);color:var(--text-dim);border:1px solid var(--line);
  }
  .pill.amber{color:var(--cyan);border-color:rgba(33,212,255,.4);background:rgba(33,212,255,.06)}
  .pill.pink{color:var(--pink);border-color:rgba(255,45,127,.4);background:rgba(255,45,127,.06)}
  .pill.teal{color:var(--cyan-soft);border-color:rgba(127,229,255,.35);background:rgba(127,229,255,.06)}

  /* ─── Key features grid ─── */
  .features{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin:48px 0 0}
  .features > div{padding:28px 24px;border-left:1px solid var(--line)}
  .features > div:first-child{border-left:none;padding-left:0}
  .features > div:last-child{padding-right:0}
  .features .f-num{font-family:'JetBrains Mono';font-size:12px;color:var(--cyan);letter-spacing:.12em;margin-bottom:12px}
  .features h3{font-size:17px;font-weight:500;color:#fff;margin-bottom:8px;line-height:1.25}
  .features p{font-size:14px;color:var(--text-dim);line-height:1.55}

  /* ─── Big image callout ─── */
  .marquee{
    margin:60px 0;padding:60px 40px;
    border-radius:var(--radius);
    background:
      linear-gradient(180deg, rgba(7,9,13,.55) 0%, rgba(7,9,13,.85) 100%),
      url('../assets/hero-bg.jpg') center/cover no-repeat;
    border:1px solid var(--line);
    text-align:center;position:relative;overflow:hidden;
  }
  .marquee::after{
    content:'';position:absolute;inset:0;pointer-events:none;
    background:radial-gradient(ellipse at 50% 120%, rgba(33,212,255,.2), transparent 60%);
  }
  .marquee > *{position:relative;z-index:1}
  .marquee img{max-width:100%;border-radius:10px;margin:32px auto 0;display:block;border:1px solid var(--line)}
  .marquee h3{font-size:28px;font-weight:500;margin-bottom:12px}
  .marquee p{color:var(--text-dim);max-width:60ch;margin:0 auto}
  .marquee .two-up{
    display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:end;
    max-width:1240px;margin:44px auto 0;
  }
  .marquee .two-up figure{margin:0;text-align:center}
  .marquee .two-up img{margin:0 auto 14px;max-height:620px;width:auto;object-fit:contain}
  .marquee .two-up figcaption{
    font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:.14em;
    text-transform:uppercase;color:var(--text-mute);
  }
  .marquee .two-up figcaption b{color:var(--cyan-soft);font-weight:600}
  @media (max-width: 780px){
    .marquee .two-up{grid-template-columns:1fr;gap:24px}
  }

  /* Hotkey cluster */
  .hotkeys{display:grid;grid-template-columns:repeat(2,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
  .hotkeys > div{padding:18px 22px;border-top:1px solid var(--line);border-left:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px;background:var(--surface)}
  .hotkeys > div:nth-child(1),.hotkeys > div:nth-child(2){border-top:none}
  .hotkeys > div:nth-child(odd){border-left:none}
  .hotkeys .hk-label{font-size:14px;color:var(--text-dim)}
  .hotkeys .hk-keys{display:flex;gap:2px;align-items:center;flex-shrink:0}

  /* Footer */
  footer{
    padding:60px 72px 80px;
    border-top:1px solid var(--line);
    display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;
    color:var(--text-mute);font-size:13px;
  }
  footer h5{
    font-family:'JetBrains Mono';font-size:11px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--text-dim);margin-bottom:14px;font-weight:600;
  }
  footer p{line-height:1.65}
  footer .credits{display:grid;grid-template-columns:auto 1fr;gap:8px 22px;font-size:13px}
  footer .credits strong{color:var(--text);font-weight:500}
  footer .colophon{color:var(--text-mute);font-family:'JetBrains Mono';font-size:11px;letter-spacing:.06em}

  /* Decoration block */
  .waveform{
    height:48px;display:flex;align-items:center;gap:2px;margin:40px 0 0;
  }
  .waveform i{
    flex:1;background:linear-gradient(to top, var(--cyan), var(--pink));
    border-radius:1px;display:block;opacity:.8;
  }

  /* responsive */
  @media (max-width: 1100px){
    .shell{grid-template-columns:1fr}
    aside.toc{position:relative;height:auto;border-right:none;border-bottom:1px solid var(--line);padding:24px 28px;display:none}
    .hero,section.chapter,footer{padding-left:32px;padding-right:32px}
    .features{grid-template-columns:repeat(2,1fr)}
    .features > div{border-left:none;border-top:1px solid var(--line);padding:22px 0}
    .features > div:first-child{border-top:none}
    .two-col{grid-template-columns:1fr;gap:32px}
    .three-col{grid-template-columns:1fr}
    .hero-meta{grid-template-columns:repeat(2,1fr);gap:24px}
    .hotkeys{grid-template-columns:1fr}
  }