:root{
    --ink:#161510; --ink-2:#46443a; --parchment:#e6e5e0; --parchment-2:#d8d7d0;
    --cream:#f1f1ec; --amber:#ef4324; --amber-soft:#f3826e; --gold:#161510;
    --teal:#3f6b4e; --plum:#6a5a3a; --rust:#ef4324;
    --line:rgba(22,21,16,.24); --line-strong:rgba(22,21,16,.6);
    --shadow:none;
    --maxw:1140px; --r:0px; --ease:cubic-bezier(.22,.61,.36,1);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;
    background:
      radial-gradient(1000px 560px at 86% -6%, rgba(37,64,255,.20), transparent 60%),
      radial-gradient(820px 620px at -8% 16%, rgba(201,242,77,.22), transparent 56%),
      radial-gradient(720px 520px at 50% 118%, rgba(37,64,255,.10), transparent 60%),
      #e6eaf6;
    color:var(--ink); font-family:"Archivo",ui-sans-serif,system-ui,sans-serif; font-size:17px; line-height:1.72;
    letter-spacing:.005em; -webkit-font-smoothing:antialiased;}
  body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
    mix-blend-mode:multiply;}
  .wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(20px,5vw,56px);position:relative;z-index:1}
  h1,h2,h3,h4{font-family:"Archivo Expanded",Georgia,serif;font-weight:600;line-height:1.08;letter-spacing:-.02em;color:var(--ink)}
  h2{font-size:clamp(1.8rem,3.6vw,2.9rem);margin:0 0 .35em}
  h3{font-size:clamp(1.25rem,2.3vw,1.65rem);margin:2.2em 0 .5em;letter-spacing:-.01em}
  h4{font-size:1.06rem;font-family:"Archivo",sans-serif;font-weight:600;letter-spacing:0;margin:1.6em 0 .4em}
  p{margin:0 0 1.05em}
  a{color:var(--amber);text-decoration-thickness:1px;text-underline-offset:3px}
  a:hover{color:var(--ink)}
  strong{font-weight:600;color:var(--ink-2)}
  .eyebrow{font-family:"Archivo",sans-serif;font-weight:600;font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--amber)}
  #bar{position:fixed;top:0;left:0;height:3px;width:0%;z-index:60;background:linear-gradient(90deg,var(--amber),var(--gold));transition:width .12s linear}
  a.skip{position:absolute;left:-999px;top:0;z-index:80;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 10px 0}
  a.skip:focus{left:0}
  :focus-visible{outline:3px solid var(--amber);outline-offset:2px;border-radius:4px}

  header.topnav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(1.3) blur(10px);background:rgba(238,241,248,.82);border-bottom:1px solid var(--line)}
  .topnav .wrap{display:flex;align-items:center;gap:18px;padding-block:14px}
  .brand{font-family:"Archivo Expanded",serif;font-weight:600;font-size:1.05rem;letter-spacing:-.01em;display:flex;align-items:center;gap:10px}
  .dot{width:11px;height:11px;border-radius:50%;background:var(--amber);box-shadow:0 0 0 4px rgba(37,64,255,.18)}
  .topnav nav{margin-left:auto;display:flex;gap:2px;flex-wrap:wrap}
  .topnav nav a{font-family:"Archivo",sans-serif;font-size:.8rem;color:var(--ink-2);text-decoration:none;padding:7px 10px;border-radius:99px;transition:background .2s var(--ease)}
  .topnav nav a:hover{background:rgba(42,44,74,.07)}
  @media(max-width:980px){.topnav nav{display:none}}

  .hero{position:relative;padding:clamp(56px,10vw,124px) 0 clamp(40px,6vw,72px);overflow:hidden}
  .hero .kicker{display:inline-flex;align-items:center;gap:10px;padding:7px 15px;border:1px solid var(--line-strong);border-radius:99px;background:var(--cream);font-size:.78rem;letter-spacing:.04em;box-shadow:var(--shadow)}
  .hero .kicker b{color:var(--amber)}
  .hero h1{font-size:clamp(2.7rem,8vw,6.2rem);font-weight:600;margin:.34em 0 .2em;letter-spacing:-.035em}
  .hero h1 em{font-style:italic;color:var(--amber)}
  .hero .lede{font-size:clamp(1.1rem,2.1vw,1.4rem);max-width:60ch;color:var(--ink-2)}
  .hero .meta{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;font-family:"Archivo",sans-serif}
  .hero .meta div{display:flex;flex-direction:column}
  .hero .meta .n{font-family:"Archivo Expanded",serif;font-size:2rem;font-weight:600;color:var(--amber);line-height:1}
  .hero .meta .l{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);margin-top:6px}
  .hero-glyph{position:absolute;right:-4%;top:8%;font-family:"Archivo Expanded",serif;font-size:min(34vw,440px);line-height:1;color:transparent;-webkit-text-stroke:2px rgba(37,64,255,.22);user-select:none;pointer-events:none;transform:rotate(-6deg)}
  @media(max-width:880px){.hero-glyph{opacity:.5;right:-18%}}
  .cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
  .btn{display:inline-flex;align-items:center;gap:9px;font-family:"Archivo",sans-serif;font-weight:600;font-size:.95rem;text-decoration:none;padding:13px 22px;border-radius:99px;transition:transform .2s var(--ease),box-shadow .2s,background .2s}
  .btn.primary{background:var(--ink);color:var(--parchment);box-shadow:var(--shadow)}
  .btn.primary:hover{transform:translateY(-2px);background:var(--amber);color:#fff}
  .btn.ghost{border:1px solid var(--line-strong);color:var(--ink)}
  .btn.ghost:hover{transform:translateY(-2px);background:var(--cream)}

  section{padding-block:clamp(44px,6.5vw,82px);position:relative}
  section + section{border-top:1px solid var(--line)}
  .sec-head{display:flex;align-items:flex-end;gap:18px;margin-bottom:8px;flex-wrap:wrap}
  .sec-head .num{font-family:"Archivo Expanded",serif;font-size:clamp(2.4rem,6vw,4.2rem);font-weight:300;color:var(--amber-soft);line-height:.8;opacity:.85}
  .lead{font-size:1.18rem;max-width:64ch;color:var(--ink-2)}
  .badges{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 4px}
  .badge{font-family:"Archivo",sans-serif;font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;font-weight:600;padding:5px 11px;border-radius:99px;border:1px solid var(--line-strong);color:var(--ink-2);background:var(--cream)}
  .badge.track{color:var(--teal);border-color:rgba(14,163,113,.4)}
  .badge.time{color:var(--amber);border-color:rgba(37,64,255,.4)}
  .badge.core{background:var(--teal);color:#fff;border-color:var(--teal)}
  .badge.adv{background:var(--amber);color:#fff;border-color:var(--amber)}
  .badge.opt{background:var(--plum);color:#fff;border-color:var(--plum)}

  /* objectives box */
  .objectives{background:linear-gradient(180deg,rgba(14,163,113,.09),rgba(14,163,113,.02));border:1px solid rgba(14,163,113,.32);border-radius:14px;padding:18px 22px;margin:22px 0}
  .objectives h4{margin:0 0 8px;color:var(--teal);font-size:.82rem;letter-spacing:.04em;text-transform:uppercase}
  .objectives ul{list-style:none;padding:0;margin:0}
  .objectives li{padding:5px 0 5px 30px;position:relative}
  .objectives li::before{content:"✓";position:absolute;left:0;top:4px;color:var(--teal);font-weight:700}

  .grid{display:grid;gap:20px;margin-top:30px}
  .g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)}
  @media(max-width:820px){.g2,.g3{grid-template-columns:1fr}}
  .card{background:var(--cream);border:1px solid var(--line);border-radius:var(--r);padding:24px 24px 22px;box-shadow:var(--shadow);transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
  .card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 18px 40px -16px rgba(20,19,15,.3)}
  .card .tag{font-family:"Archivo",sans-serif;font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--amber)}
  .card h4{margin:.5em 0 .35em}
  .card p:last-child{margin-bottom:0}
  .card .ix{font-family:"Archivo Expanded",serif;font-size:1.5rem;color:var(--teal);font-weight:600}

  .modules{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:30px}
  @media(max-width:820px){.modules{grid-template-columns:1fr}}
  .mod{display:flex;gap:16px;align-items:flex-start;text-decoration:none;color:inherit;background:var(--cream);border:1px solid var(--line);border-radius:14px;padding:18px 20px;transition:transform .2s var(--ease),border-color .2s,background .2s}
  .mod:hover{transform:translateX(4px);border-color:var(--amber);background:#fff}
  .mod .mi{font-family:"Archivo Expanded",serif;font-weight:600;font-size:1.3rem;color:var(--amber);min-width:2ch}
  .mod .mt{font-family:"Archivo",sans-serif;font-weight:600;font-size:1rem}
  .mod .md{font-size:.86rem;color:var(--ink-2);margin-top:2px}
  .mod .row{display:flex;gap:8px;align-items:center;margin-top:8px;flex-wrap:wrap}
  .level{font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;font-weight:600;padding:3px 8px;border-radius:99px}
  .lvl-core{background:rgba(14,163,113,.14);color:var(--teal)}
  .lvl-adv{background:rgba(37,64,255,.14);color:var(--amber)}
  .lvl-opt{background:rgba(109,74,255,.14);color:var(--plum)}
  .mins{font-size:.72rem;color:var(--ink-2)}

  .callout{border-radius:14px;padding:18px 20px 16px;margin:24px 0;border:1px solid var(--line);background:var(--cream)}
  .callout .h{font-family:"Archivo",sans-serif;font-weight:600;font-size:.82rem;letter-spacing:.04em;display:flex;align-items:center;gap:9px;margin-bottom:6px}
  .callout p:last-child{margin-bottom:0}
  .callout.do{background:linear-gradient(180deg,rgba(14,163,113,.10),rgba(14,163,113,.03));border-color:rgba(14,163,113,.35)}
  .callout.do .h{color:var(--teal)}
  .callout.dont{background:linear-gradient(180deg,rgba(37,64,255,.10),rgba(37,64,255,.03));border-color:rgba(37,64,255,.35)}
  .callout.dont .h{color:var(--amber)}
  .callout.shift{background:linear-gradient(180deg,rgba(201,242,77,.14),rgba(201,242,77,.04));border-color:rgba(201,242,77,.45)}
  .callout.shift .h{color:#5c6800}
  .callout.try{background:linear-gradient(180deg,rgba(109,74,255,.10),rgba(109,74,255,.03));border-color:rgba(109,74,255,.4)}
  .callout.try .h{color:var(--plum)}
  .callout.danger{background:linear-gradient(180deg,rgba(162,59,30,.12),rgba(162,59,30,.03));border-color:rgba(162,59,30,.4)}
  .callout.danger .h{color:var(--rust)}
  .callout.key{background:var(--ink);color:var(--parchment-2);border-color:var(--ink)}
  .callout.key .h{color:var(--amber-soft)} .callout.key strong{color:#fff}

  pre{background:var(--ink);color:#e9ecfb;border-radius:13px;padding:18px 20px;overflow:auto;font-family:"Space Mono",ui-monospace,monospace;font-size:.84rem;line-height:1.62;margin:18px 0;border:1px solid #000;box-shadow:inset 0 1px 0 rgba(255,255,255,.04),var(--shadow)}
  pre .c{color:#9aa7a0} pre .g{color:#6f80ff}
  code{font-family:"Space Mono",monospace;font-size:.86em;background:rgba(42,44,74,.07);padding:.12em .4em;border-radius:6px}
  pre code{background:none;padding:0}
  .compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}
  @media(max-width:760px){.compare{grid-template-columns:1fr !important}}
  .compare .col h5{margin:0 0 6px;font-family:"Archivo",sans-serif;font-size:.78rem;letter-spacing:.1em;text-transform:uppercase}
  .compare .weak h5{color:var(--rust)} .compare .strong h5{color:var(--teal)}
  .ex{background:var(--cream);border:1px dashed var(--line-strong);border-radius:11px;padding:12px 15px;font-family:"Space Mono",monospace;font-size:.82rem;line-height:1.55}

  .tbl{width:100%;border-collapse:collapse;margin:22px 0;font-size:.92rem;background:var(--cream);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
  .tbl th,.tbl td{text-align:left;padding:12px 15px;border-bottom:1px solid var(--line);vertical-align:top}
  .tbl th{font-family:"Archivo",sans-serif;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink);background:var(--parchment-2)}
  .tbl tr:last-child td{border-bottom:none}
  .tbl td:first-child{font-weight:600}
  .tbl.rubric td:first-child{white-space:nowrap}
  .tbl.rubric td{font-size:.86rem}

  ol.steps{counter-reset:s;list-style:none;padding:0;margin:22px 0}
  ol.steps li{counter-increment:s;position:relative;padding:0 0 16px 52px;margin:0}
  ol.steps li::before{content:counter(s);position:absolute;left:0;top:-2px;width:34px;height:34px;border-radius:50%;background:var(--ink);color:var(--parchment);font-family:"Archivo Expanded",serif;font-weight:600;display:grid;place-items:center;font-size:1rem}
  ul.clean{list-style:none;padding:0;margin:14px 0}
  ul.clean li{padding:6px 0 6px 28px;position:relative}
  ul.clean li::before{content:"→";position:absolute;left:0;color:var(--amber);font-weight:700}

  .sheet{background:var(--ink);color:var(--parchment);border-radius:var(--r);padding:clamp(24px,4vw,40px);margin-top:26px;box-shadow:var(--shadow)}
  .sheet h3{color:#fff;margin-top:0}
  .sheet code{background:rgba(255,255,255,.1);color:var(--amber-soft)}
  .sheet .tt{font-family:"Space Mono",monospace;font-size:.86rem;line-height:1.75;white-space:pre-wrap;color:#e9ecfb}
  .pill{display:inline-block;background:rgba(37,64,255,.22);color:var(--amber-soft);border:1px solid rgba(111,128,255,.4);border-radius:7px;padding:1px 7px;font-family:"Space Mono",monospace;font-size:.8em}

  details.exit,details.ex-card{background:var(--cream);border:1px solid var(--line);border-radius:13px;padding:4px 20px;margin:12px 0;box-shadow:var(--shadow)}
  details.exit summary,details.ex-card summary{cursor:pointer;font-family:"Archivo",sans-serif;font-weight:600;padding:14px 0;list-style:none;display:flex;align-items:center;gap:12px}
  details summary::-webkit-details-marker{display:none}
  details.exit summary::before,details.ex-card summary::before{content:"+";font-family:"Archivo Expanded",serif;font-size:1.5rem;color:var(--amber);transition:transform .25s var(--ease)}
  details[open] summary::before{transform:rotate(45deg)}
  details .body{padding:0 0 16px 38px;color:var(--ink-2)}
  details.exit{border-color:rgba(14,163,113,.3);background:linear-gradient(180deg,rgba(14,163,113,.05),transparent)}
  details.exit summary::before{color:var(--teal)}

  /* diagrams */
  figure.diagram{margin:26px 0;background:var(--cream);border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow)}
  figure.diagram svg{width:100%;height:auto;display:block}
  figure.diagram figcaption{font-size:.84rem;color:var(--ink-2);margin-top:12px;font-style:italic}
  .d-label{font-family:"Archivo",sans-serif;font-weight:600}
  .d-mono{font-family:"Space Mono",monospace}

  footer{background:var(--ink);color:var(--parchment-2);padding:clamp(46px,7vw,84px) 0 40px;position:relative;z-index:1}
  footer h3,footer h4{color:#fff} footer a{color:var(--amber-soft)}
  footer .refcols{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:18px}
  @media(max-width:820px){footer .refcols{grid-template-columns:1fr}}
  footer .refcols h4{font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--amber-soft);margin:0 0 8px}
  footer .refcols ul{list-style:none;padding:0;margin:0;font-size:.84rem;line-height:1.5}
  footer .refcols li{margin-bottom:8px;color:#b9bee6}
  footer .fine{margin-top:34px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);font-size:.8rem;color:#9c9483}
  footer .fine span{color:#bcae93}

  .reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
  .reveal.in{opacity:1;transform:none}
  @media(prefers-reduced-motion:reduce){
    *{scroll-behavior:auto !important}
    .reveal{opacity:1 !important;transform:none !important;transition:none !important}
    .card:hover,.mod:hover,.btn:hover{transform:none !important}
    #bar{display:none}
    .rbtn:hover,.runnable:hover{transform:none !important}
    #toast{transition:none !important}
  }

  /* ===== interactivity additions ===== */
  .runnable{margin:14px 0}
  .runnable .ptext{display:block;width:100%;margin:0;white-space:pre-wrap;background:var(--ink);color:#e9ecfb;border-radius:13px;padding:16px 18px;font-family:"Space Mono",monospace;font-size:.82rem;line-height:1.6;border:1px solid #000;box-shadow:var(--shadow)}
  textarea.ptext{resize:vertical;min-height:320px}
  .runbar{display:flex;gap:8px;flex-wrap:wrap;padding:10px 2px 2px}
  .rbtn{font-family:"Archivo",sans-serif;font-weight:600;font-size:.78rem;border:1px solid var(--line-strong);background:var(--cream);color:var(--ink);border-radius:99px;padding:7px 14px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:transform .15s var(--ease),background .15s,color .15s,border-color .15s}
  .rbtn:hover{transform:translateY(-1px)}
  .rbtn.copy:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
  .rbtn.gpt:hover{background:#10a37f;color:#fff;border-color:#10a37f}
  .rbtn.claude:hover{background:var(--amber);color:#fff;border-color:var(--amber)}
  .rbtn.gemini:hover{background:#3b6cf6;color:#fff;border-color:#3b6cf6}
  .rbtn.ok{background:var(--teal)!important;color:#fff!important;border-color:var(--teal)!important}

  .builder{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px;align-items:start}
  @media(max-width:860px){.builder{grid-template-columns:1fr}}
  .bform{display:flex;flex-direction:column;gap:13px}
  .field{display:flex;flex-direction:column;gap:5px;font-family:"Archivo",sans-serif;font-weight:600;font-size:.82rem}
  .field small{font-weight:400;color:var(--ink-2)}
  .field input,.field textarea{font-family:"Archivo",sans-serif;font-weight:400;font-size:.92rem;padding:10px 12px;border:1px solid var(--line-strong);border-radius:10px;background:#fff;color:var(--ink);resize:vertical}
  .field input:focus,.field textarea:focus{border-color:var(--amber)}
  .bout{position:sticky;top:78px}

  .lib{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:14px}
  @media(max-width:860px){.lib{grid-template-columns:1fr}}
  .lib-card{background:var(--cream);border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow);transition:transform .2s var(--ease),border-color .2s}
  .lib-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}
  .lib-card h4{margin:.5em 0 .2em}
  .lib-card .ptext{font-size:.76rem}
  .cat{font-family:"Archivo",sans-serif;font-size:.64rem;letter-spacing:.12em;text-transform:uppercase;font-weight:600;padding:4px 10px;border-radius:99px}
  .cat.biz{background:rgba(14,163,113,.14);color:var(--teal)}
  .cat.edu{background:rgba(37,64,255,.14);color:var(--amber)}
  .cat.per{background:rgba(109,74,255,.14);color:var(--plum)}
  .cat.cre{background:rgba(201,242,77,.2);color:#5c6800}

  #toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:11px 20px;border-radius:99px;font-family:"Archivo",sans-serif;font-size:.85rem;font-weight:600;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;z-index:90}
  #toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

  /* ===== progress tracking ===== */
  .complete-row{display:flex;justify-content:flex-end;margin-top:30px}
  .markbtn{font-family:"Archivo",sans-serif;font-weight:600;font-size:.82rem;border:1px solid var(--line-strong);background:var(--cream);color:var(--ink);border-radius:99px;padding:9px 18px;cursor:pointer;display:inline-flex;gap:8px;align-items:center;transition:transform .15s var(--ease),background .15s,border-color .15s,color .15s}
  .markbtn:hover{transform:translateY(-1px);border-color:var(--amber)}
  .markbtn.done{background:var(--teal);color:#fff;border-color:var(--teal)}
  #progress{position:fixed;left:18px;bottom:18px;z-index:70;background:var(--ink);color:#fff;border-radius:14px;padding:13px 16px 12px;box-shadow:var(--shadow);font-family:"Archivo",sans-serif;font-size:.8rem;width:212px}
  #progress strong{font-weight:700}
  #progress .ptrack{height:7px;border-radius:99px;background:rgba(255,255,255,.16);margin-top:9px;overflow:hidden}
  #progress .pfill{height:100%;background:linear-gradient(90deg,var(--amber),var(--gold));width:0%;transition:width .4s var(--ease)}
  #progress .preset{color:var(--amber-soft);cursor:pointer;font-size:.72rem;text-decoration:underline;margin-top:8px;display:inline-block}
  @media(max-width:620px){#progress{display:none}}

  /* ===== email capture ===== */
  .capture{background:var(--ink);color:#fff;border-radius:22px;padding:clamp(28px,5vw,52px);margin-top:10px;position:relative;overflow:hidden}
  .capture::after{content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(201,242,77,.22),transparent 70%);pointer-events:none}
  .capture .eyebrow{color:var(--gold)}
  .capture h2{color:#fff;position:relative}
  .capture .sub{color:#c3c8ee;max-width:54ch;position:relative}
  .capture form{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px;max-width:540px;position:relative}
  .capture input{flex:1;min-width:220px;font-family:"Archivo",sans-serif;font-size:1rem;padding:14px 16px;border-radius:12px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.07);color:#fff}
  .capture input::placeholder{color:#9aa0cc}
  .capture input:focus{outline:2px solid var(--gold);border-color:transparent}
  .capture button{font-family:"Archivo",sans-serif;font-weight:700;font-size:1rem;padding:14px 24px;border-radius:12px;border:none;background:var(--gold);color:var(--ink);cursor:pointer;transition:transform .15s var(--ease)}
  .capture button:hover{transform:translateY(-2px)}
  .capture .note{font-size:.78rem;color:#9aa0cc;margin-top:13px;position:relative}
  .capture .ok{color:var(--gold);font-weight:600;font-size:1.05rem;position:relative}

  /* ===== built-by footer ===== */
  .builtby{margin-top:36px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14)}
  .builtby h4{color:var(--amber-soft);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;margin:0 0 12px}
  .bgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
  @media(max-width:640px){.bgrid{grid-template-columns:1fr}}
  .bcard{display:block;text-decoration:none;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:16px 18px;transition:transform .2s var(--ease),border-color .2s}
  .bcard:hover{transform:translateY(-3px);border-color:var(--amber-soft)}
  .bcard .bn{font-family:"Archivo Expanded",sans-serif;font-weight:700;color:#fff;font-size:1.1rem}
  .bcard .bd{color:#aab0d8;font-size:.85rem;margin-top:4px;line-height:1.5}
  .bcard .bu{color:var(--amber-soft);font-size:.76rem;margin-top:9px;font-family:"Space Mono",monospace}

  /* ===== anti-pattern failure list (editorial, not cards) ===== */
  .faults{list-style:none;counter-reset:f;padding:0;margin:28px 0 6px;border-top:1px solid var(--line-strong)}
  .faults li{counter-increment:f;display:grid;grid-template-columns:50px 1fr;gap:18px;padding:18px 2px;border-bottom:1px solid var(--line)}
  .faults li::before{content:counter(f,decimal-leading-zero);font-family:"Space Mono",monospace;color:var(--amber);font-weight:700;font-size:.82rem;padding-top:4px}
  .faults p{margin:0;line-height:1.62;color:var(--ink-2)}
  .faults .fname{font-family:"Archivo Expanded",sans-serif;font-weight:700;color:var(--ink)}

  /* ===== section bands (full-bleed) for rhythm & depth ===== */
  section + section{border-top:0}
  .band-tint,.band-dark{position:relative;padding-block:clamp(56px,8vw,104px)}
  .band-tint{background:#dfe6ff;box-shadow:0 0 0 100vmax #dfe6ff;clip-path:inset(0 -100vmax)}
  .band-citron{background:#eef6d6;box-shadow:0 0 0 100vmax #eef6d6;clip-path:inset(0 -100vmax)}
  .band-dark{background:#0f1124;color:#fff;box-shadow:0 0 0 100vmax #0f1124;clip-path:inset(0 -100vmax)}
  .band-dark h2,.band-dark h3{color:#fff}
  .band-dark .lead{color:#c8cdf0}
  .band-dark .eyebrow{color:var(--gold)}
  .band-dark .sec-head .num{color:#5b6dff;opacity:1}
  .band-dark .card{background:rgba(255,255,255,.055);border-color:rgba(255,255,255,.12)}
  .band-dark .card h4{color:#fff}
  .band-dark .card p{color:#d3d7f2}
  .band-dark .card .ix,.band-dark .card .tag{color:var(--gold)}
  .band-dark .badge{background:rgba(255,255,255,.06);color:#c8cdf0;border-color:rgba(255,255,255,.2)}
  .band-dark .objectives{background:rgba(201,242,77,.07);border-color:rgba(201,242,77,.28)}
  .band-dark .objectives h4{color:var(--gold)}
  .band-dark .objectives li{color:#dfe3f6}
  .band-dark .objectives li::before{color:var(--gold)}

  /* depth on cards */
  .card{box-shadow:0 1px 2px rgba(20,21,42,.05), 0 22px 44px -22px rgba(20,21,42,.32)}

  /* ===== richer hero with floating prompt card ===== */
  .hero{position:relative;overflow:hidden}
  .hero::before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:
     radial-gradient(620px 360px at 76% 4%, rgba(37,64,255,.22), transparent 62%),
     radial-gradient(540px 420px at 6% 92%, rgba(201,242,77,.30), transparent 60%)}
  .hero .wrap{position:relative;z-index:1}
  .hero-card{position:absolute;right:max(24px,5vw);top:52%;transform:translateY(-50%) rotate(2.5deg);width:332px;background:var(--ink);border-radius:18px;padding:17px;box-shadow:0 34px 66px -22px rgba(20,21,42,.55);z-index:1}
  .hero-card .hc-top{display:flex;gap:6px;margin-bottom:13px}
  .hero-card .hc-dot{width:10px;height:10px;border-radius:50%;background:#3a3d5e}
  .hero-card .hc-dot:first-child{background:var(--rust)}
  .hero-card .hc-dot:nth-child(2){background:var(--gold)}
  .hero-card .hc-dot:nth-child(3){background:var(--teal)}
  .hero-card pre{background:transparent;border:none;box-shadow:none;color:#e9ecfb;font-family:"Space Mono",monospace;font-size:.78rem;line-height:1.62;margin:0;padding:0;white-space:pre-wrap}
  .hero-card .hc-btns{display:flex;gap:7px;margin-top:15px}
  .hero-card .hc-b{font-family:"Archivo",sans-serif;font-size:.72rem;font-weight:600;color:#fff;border:1px solid rgba(255,255,255,.18);border-radius:20px;padding:5px 11px}
  .hero-card .hc-b.acc{background:var(--gold);color:var(--ink);border-color:var(--gold)}
  @media(min-width:1061px){.hero .eyebrow,.hero .lede,.hero .cta-row{max-width:600px}.hero h1{max-width:760px}}
  @media(max-width:1359px){.hero-card{display:none}}

/* ===== interactive learner tracks ===== */
.track-card{cursor:pointer;position:relative;transition:transform .2s var(--ease),border-color .2s,box-shadow .2s}
.track-card:hover{transform:translateY(-4px);border-color:var(--amber)}
.track-card.sel{border-color:var(--amber);box-shadow:0 0 0 2px var(--amber),var(--shadow)}
.track-card.sel::after{content:"\2713 Your track";position:absolute;top:14px;right:14px;background:var(--amber);color:#fff;font-family:"Archivo",sans-serif;font-size:.64rem;font-weight:700;letter-spacing:.04em;padding:4px 10px;border-radius:99px}
.track-path{margin:22px 0 4px;padding:16px 20px;border-radius:14px;background:var(--ink);color:#fff;font-family:"Archivo",sans-serif;font-size:.95rem;line-height:1.55}
.track-path strong{color:var(--gold)}
.track-clear{margin-left:8px;background:transparent;border:1px solid rgba(255,255,255,.3);color:#fff;font-family:"Archivo",sans-serif;font-size:.78rem;font-weight:600;padding:5px 12px;border-radius:99px;cursor:pointer}
.track-clear:hover{background:rgba(255,255,255,.12)}
.mod.dim{opacity:.34;filter:grayscale(.4)}
.mod.dim:hover{opacity:.62;transform:none}


/* ============================================================
   FIELD MANUAL OVERRIDE
   Concept: the manual for the craft of instructing AI.
   World: technical manual x Swiss typographic. Constraint: flat,
   ruled, square; two inks (ink + signal red) on oat paper; grid.
   Signature: numbered specimens, paragraph-sign sections.
   ============================================================ */
*{border-radius:0 !important; box-shadow:none !important}
body{background:#e6e5e0 !important; font-family:"Archivo",system-ui,sans-serif}
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;mix-blend-mode:normal;opacity:1;
  background-image:linear-gradient(rgba(22,21,16,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(22,21,16,.05) 1px,transparent 1px);
  background-size:36px 36px}

h1,h2,h3{font-family:"Archivo Expanded","Archivo",sans-serif !important;font-weight:800;letter-spacing:-.02em}
h4{font-family:"Archivo",sans-serif !important;font-weight:700}
.eyebrow{font-family:"Space Mono",monospace !important;color:var(--amber) !important;letter-spacing:.16em}

/* masthead nav */
header.topnav{background:#e6e5e0 !important;border-bottom:2px solid var(--ink) !important;backdrop-filter:none !important}
.brand{font-family:"Space Mono",monospace;font-weight:700;text-transform:uppercase;letter-spacing:.03em;font-size:.92rem}
.dot{width:12px;height:12px;background:var(--amber)}
.topnav nav a{font-family:"Space Mono",monospace;font-size:.7rem;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-2)}
.topnav nav a:hover{background:var(--ink);color:var(--parchment)}

/* buttons */
.btn{font-family:"Space Mono",monospace;text-transform:uppercase;letter-spacing:.04em;font-weight:700;border:2px solid var(--ink)}
.btn.primary{background:var(--ink);color:var(--parchment)}
.btn.primary:hover{background:var(--amber);border-color:var(--amber);color:#fff;transform:none}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--parchment);transform:none}

/* hero: kill glow, rule it off, restyle floating card as a paper SPECIMEN */
.hero::before{display:none !important}
.hero{border-bottom:2px solid var(--ink)}
.hero h1 em{font-style:italic;color:var(--amber)}
.hero-card{background:var(--cream) !important;border:2px solid var(--ink) !important;transform:rotate(-1.2deg);padding:16px}
.hero-card::before{content:"PROMPT \2014 REF P-01";display:block;font-family:"Space Mono",monospace;font-size:.62rem;letter-spacing:.1em;color:var(--amber);border-bottom:1.5px solid var(--ink);padding-bottom:9px;margin-bottom:11px}
.hero-card .hc-top{display:none}
.hero-card pre{color:var(--ink) !important}
.hero-card .hc-b{border:1.5px solid var(--ink) !important;color:var(--ink) !important;font-family:"Space Mono",monospace;text-transform:uppercase;font-size:.64rem}
.hero-card .hc-b.acc{background:var(--amber) !important;color:#fff !important;border-color:var(--amber) !important}

/* section numbers as paragraph marks */
.sec-head .num{font-family:"Archivo Expanded",sans-serif !important;font-weight:800;color:var(--ink);opacity:1}
.sec-head .num::before{content:"\00a7";color:var(--amber);margin-right:.06em}

/* bands: flat, full-bleed restored (universal box-shadow kill is overridden here) */
.band-tint{background:#dfe0dc !important;box-shadow:0 0 0 100vmax #dfe0dc !important}
.band-citron{background:#e5e4dc !important;box-shadow:0 0 0 100vmax #e5e4dc !important}
.band-dark{background:var(--ink) !important;box-shadow:0 0 0 100vmax var(--ink) !important}
.band-dark .card{background:rgba(244,241,232,.05) !important;border-color:rgba(234,231,221,.34) !important}

/* cards -> ruled boxes */
.card{background:var(--cream) !important;border:1.5px solid var(--ink) !important}
.card:hover{transform:none !important;border-color:var(--amber) !important}
.card .ix{font-family:"Archivo Expanded",sans-serif;color:var(--amber)}
.card .tag{font-family:"Space Mono",monospace;color:var(--amber)}

/* course map modules */
.mod{background:var(--cream) !important;border:1.5px solid var(--ink) !important}
.mod:hover{transform:none !important;border-color:var(--amber) !important}
.mod .mi{font-family:"Archivo Expanded",sans-serif;color:var(--amber)}
.level{font-family:"Space Mono",monospace}

/* tracks */
.track-card.sel{border-color:var(--amber) !important;box-shadow:0 0 0 2px var(--amber) !important}
.track-card.sel::after{background:var(--amber);font-family:"Space Mono",monospace}
.track-path{background:var(--ink) !important}
.track-clear{font-family:"Space Mono",monospace;text-transform:uppercase}

/* callouts -> labeled ruled boxes */
.callout{border:1.5px solid var(--ink) !important;background:var(--cream) !important}
.callout .h{font-family:"Space Mono",monospace;text-transform:uppercase;letter-spacing:.05em}
.callout.key{background:var(--ink) !important;color:var(--parchment) !important}
.callout.key .h{color:var(--amber-soft)}
.callout.do{border-color:var(--teal) !important}.callout.do .h{color:var(--teal)}
.callout.dont,.callout.danger{border-color:var(--amber) !important}.callout.dont .h,.callout.danger .h{color:var(--amber)}
.callout.try{border-color:var(--plum) !important}.callout.try .h{color:var(--plum)}
.callout.shift{border-color:var(--ink) !important}.callout.shift .h{color:var(--ink)}

/* badges */
.badge{font-family:"Space Mono",monospace;border:1.5px solid var(--line-strong);background:transparent;color:var(--ink)}
.badge.core{background:var(--ink);color:var(--parchment);border-color:var(--ink)}
.badge.adv{background:var(--amber);color:#fff;border-color:var(--amber)}
.badge.opt{background:transparent;color:var(--ink);border-color:var(--ink)}

/* code + specimen prompt boxes -> paper, ruled */
pre{background:var(--cream) !important;color:var(--ink) !important;border:1.5px solid var(--ink) !important}
pre .c{color:#8a8472}pre .g{color:var(--amber)}
code{background:var(--parchment-2);color:var(--ink)}
.runnable .ptext, textarea.ptext{background:var(--cream) !important;color:var(--ink) !important;border:1.5px solid var(--ink) !important;font-family:"Space Mono",monospace}
.runbar .rbtn{border:1.5px solid var(--ink);background:var(--cream);color:var(--ink);font-family:"Space Mono",monospace;text-transform:uppercase;font-size:.72rem}
.runbar .rbtn:hover{background:var(--ink);color:var(--parchment);border-color:var(--ink);transform:none}
.runbar .rbtn.claude:hover{background:var(--amber);color:#fff;border-color:var(--amber)}
.runbar .rbtn.ok{background:var(--amber) !important;color:#fff !important;border-color:var(--amber) !important}

/* tables */
.tbl{border:1.5px solid var(--ink)}
.tbl th{background:var(--ink);color:var(--parchment);font-family:"Space Mono",monospace}

/* objectives */
.objectives{background:var(--cream) !important;border:1.5px solid var(--ink) !important}
.objectives h4{color:var(--amber);font-family:"Space Mono",monospace}
.objectives li::before{color:var(--amber)}

/* steps */
ol.steps li::before{background:var(--ink);font-family:"Archivo Expanded",sans-serif}

/* progress, capture, sheet */
#bar{background:var(--amber) !important}
#progress{background:var(--ink) !important;border:2px solid var(--ink)}
#progress .pfill{background:var(--amber) !important}
.sheet{background:var(--ink) !important;border:2px solid var(--ink)}
.capture{background:var(--ink) !important;border:2px solid var(--ink)}
.capture button{background:var(--amber);color:#fff;font-family:"Space Mono",monospace;text-transform:uppercase}

/* footer */
footer .bcard{border:1.5px solid rgba(234,231,221,.32) !important}
.bcard .bn{font-family:"Archivo Expanded",sans-serif}

:focus-visible{outline-color:var(--amber) !important}

/* ============================================================
   FIELD MANUAL — TYPOGRAPHIC SCALE
   Modular scale (~1.33), tight Swiss display, measured body.
   Archivo Expanded = display, Archivo = body, Space Mono = labels.
   ============================================================ */
:root{
  --t-xs:.72rem; --t-sm:.86rem; --t-base:1.0625rem; --t-md:1.2rem;
  --t-lg:clamp(1.45rem,2.4vw,1.78rem);
  --t-xl:clamp(1.85rem,3.6vw,2.6rem);
  --t-2xl:clamp(2.3rem,5vw,3.5rem);
  --t-display:clamp(3rem,8.4vw,6.6rem);
}
body{font-size:var(--t-base);line-height:1.62;letter-spacing:0}
p{max-width:74ch}
.lead,.hero .lede{font-size:var(--t-md) !important;line-height:1.5;max-width:60ch}

.hero h1{font-size:var(--t-display) !important;line-height:.9 !important;letter-spacing:-.035em !important;font-weight:800 !important;margin:.18em 0 .12em}
h1{font-size:var(--t-2xl);line-height:.98;letter-spacing:-.028em;font-weight:800}
h2{font-size:var(--t-xl) !important;line-height:1.02;letter-spacing:-.022em;margin:0 0 .42em;font-weight:800}
h3{font-size:var(--t-lg) !important;line-height:1.12;letter-spacing:-.012em;margin:2.1em 0 .5em;font-weight:700}
h4{font-size:1.02rem !important;letter-spacing:0;font-weight:700;margin:1.5em 0 .4em}

.eyebrow{font-size:var(--t-xs);letter-spacing:.2em;line-height:1.4}
.sec-head{align-items:baseline;gap:16px}
.sec-head .num{font-size:clamp(2.1rem,5.4vw,3.7rem) !important;line-height:.82;letter-spacing:-.02em}
.badge{font-size:.65rem;letter-spacing:.09em;padding:5px 10px}
.lead{margin-bottom:1em}

/* components dialed to the scale */
.card h4{font-size:1.05rem;margin-top:.2em}
.card p{font-size:.95rem;line-height:1.55}
.card .ix{font-size:1.5rem}
.mod .mt{font-size:1.02rem;letter-spacing:-.01em}
.mod .md{font-size:.86rem}
pre,.runnable .ptext{font-size:.8rem;line-height:1.62}
code{font-size:.85em}
.runbar .rbtn{font-size:.7rem;letter-spacing:.05em}
.btn{font-size:.74rem;letter-spacing:.05em;padding:14px 22px}
.tbl{font-size:.93rem} .tbl th{font-size:.68rem;letter-spacing:.09em}
.callout .h{font-size:.74rem;letter-spacing:.08em}
.objectives h4{font-size:.74rem;letter-spacing:.08em}
ol.steps li{padding-left:54px} ol.steps li::before{font-size:.95rem}
.track-path{font-size:.95rem}

/* ===== section checkpoints ===== */
.checkpoint{border:2px solid var(--ink);background:var(--cream);margin-top:32px}
.cp-head{border-bottom:1.5px solid var(--ink);padding:13px 16px}
.cp-title{display:block;font-family:"Space Mono",monospace;text-transform:uppercase;letter-spacing:.08em;font-size:.74rem;color:var(--amber)}
.cp-sub{display:block;font-size:.84rem;color:var(--ink-2);margin-top:5px;line-height:1.45}
.cp-practice{font-family:"Space Mono",monospace;font-size:.76rem;color:var(--teal);padding:12px 16px;border-top:1.5px solid var(--ink);margin:0}
.cp-qs{list-style:none;margin:0;padding:0;counter-reset:cpq}
.cp-q{counter-increment:cpq;border-bottom:1.5px solid var(--ink);padding:18px 16px}
.cp-prompt{font-weight:700;margin:0 0 11px;max-width:none}
.cp-prompt::before{content:"Q" counter(cpq) ". ";font-family:"Space Mono",monospace;color:var(--amber);font-weight:700}
.cp-opts{display:grid;gap:8px}
.cp-opt{text-align:left;font-family:"Archivo",sans-serif;font-size:.92rem;line-height:1.4;background:var(--parchment);border:1.5px solid var(--ink);padding:10px 13px;cursor:pointer;color:var(--ink);transition:background .12s}
.cp-opt:hover{background:var(--ink);color:var(--parchment)}
.cp-opt.sel{background:var(--ink);color:var(--parchment)}
.cp-opt.ok{background:var(--teal) !important;color:#fff !important;border-color:var(--teal) !important}
.cp-opt.no{background:var(--amber) !important;color:#fff !important;border-color:var(--amber) !important}
.cp-why{font-size:.85rem;color:var(--ink-2);margin:11px 0 0;background:var(--parchment-2);padding:9px 13px;border:1px solid var(--line)}
.cp-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:15px 16px;border-top:1.5px solid var(--ink)}
.cp-check{font-family:"Space Mono",monospace;text-transform:uppercase;letter-spacing:.05em;border:2px solid var(--ink);background:var(--ink);color:var(--parchment);padding:11px 18px;cursor:pointer;font-size:.74rem}
.cp-check[disabled]{background:var(--teal);border-color:var(--teal);cursor:default}
.cp-status{font-family:"Space Mono",monospace;font-size:.78rem}
.cp-status.pass{color:var(--teal)} .cp-status.warn{color:var(--amber)}
.checkpoint.done .cp-opt{pointer-events:none}

/* on-path marker for selected track (so every track visibly changes the map) */
.mod.onpath{border-color:var(--amber) !important}
.mod.onpath .mi{color:var(--amber)}

/* ===== 'from the makers' tasteful house placement ===== */
.makers-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:28px}
@media(max-width:760px){.makers-grid{grid-template-columns:1fr}}
.maker{display:flex;flex-direction:column;gap:8px;text-decoration:none;background:var(--cream);border:2px solid var(--ink);padding:22px;transition:transform .15s var(--ease),border-color .15s}
.maker:hover{transform:translateY(-3px);border-color:var(--amber)}
.maker-ref{font-family:"Space Mono",monospace;font-size:.64rem;letter-spacing:.12em;color:var(--amber)}
.maker-name{font-family:"Archivo Expanded",sans-serif;font-weight:800;font-size:1.3rem;color:var(--ink);letter-spacing:-.01em}
.maker-desc{color:var(--ink-2);font-size:.92rem;line-height:1.5}
.maker-cta{font-family:"Space Mono",monospace;text-transform:uppercase;font-size:.74rem;font-weight:700;color:var(--amber);margin-top:4px}

/* ===== FAQ (AEO) ===== */
.faq{margin-top:26px;border-top:1.5px solid var(--ink)}
.faq-item{border-bottom:1.5px solid var(--ink);padding:18px 2px}
.faq dt{font-family:"Archivo",sans-serif;font-weight:700;font-size:1.05rem;color:var(--ink);margin-bottom:7px}
.faq dt::before{content:"Q. ";font-family:"Space Mono",monospace;color:var(--amber);font-weight:700}
.faq dd{margin:0;color:var(--ink-2);line-height:1.62;max-width:82ch}

/* ===== dark-band contrast fixes (light components need readable text) ===== */
.band-dark .card .ix, .band-dark .card .tag{color:var(--amber) !important}
.band-dark .card strong, .band-dark .card span, .band-dark .lead strong, .band-dark .lead span{color:#eaedf8 !important}
.band-dark .callout:not(.key) p, .band-dark .callout:not(.key) li, .band-dark .callout:not(.key) dd, .band-dark .callout:not(.key) strong, .band-dark .callout:not(.key) em{color:var(--ink-2) !important}

/* ===== responsive tables (scroll within box, never stretch the page) ===== */
.tbl-wrap{overflow-x:auto;max-width:100%;-webkit-overflow-scrolling:touch;margin:22px 0}
.tbl-wrap .tbl{margin:0}
.tbl.rubric{min-width:560px}

/* ===== mobile navigation (hamburger) ===== */
.menu-btn{display:none;margin-left:auto;width:44px;height:40px;border:2px solid var(--ink);background:var(--parchment);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;padding:0}
.menu-btn span{display:block;width:20px;height:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:980px){
  .topnav .wrap{position:relative;flex-wrap:nowrap}
  .menu-btn{display:flex}
  .topnav nav.open{display:flex;flex-direction:column;gap:0;position:absolute;top:calc(100% + 2px);left:0;right:0;background:#e6e5e0;border:2px solid var(--ink);border-top:none;padding:4px;max-height:78vh;overflow-y:auto;z-index:60}
  .topnav nav.open a{padding:13px 12px;border-bottom:1px solid var(--line);width:100%;font-size:.82rem;border-radius:0}
  .topnav nav.open a:last-child{border-bottom:none}
}

/* ===== paper grain — subtle material texture over the drafting grid ===== */
body::after{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.8;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.78' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23g)' opacity='.1'/%3E%3C/svg%3E");}

/* ===== domain flavor: Business / Education / Personal ===== */
/* default (no JS, or business) shows the business variant only */
.dx-edu,.dx-personal{display:none}
body[data-domain="education"] .dx-edu{display:revert}
body[data-domain="education"] .dx-biz{display:none}
body[data-domain="personal"] .dx-personal{display:revert}
body[data-domain="personal"] .dx-biz{display:none}

.domain-pick{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:26px 0 4px;font-family:"Space Mono",monospace}
.domain-pick .dp-label{font-size:.64rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2);margin-right:2px}
.dp-btn{font-family:"Space Mono",monospace;font-size:.68rem;text-transform:uppercase;letter-spacing:.05em;border:1.5px solid var(--ink);background:transparent;color:var(--ink);padding:7px 13px;cursor:pointer;transition:background .15s var(--ease),color .15s,border-color .15s}
.dp-btn[aria-pressed="true"]{background:var(--ink);color:var(--parchment)}
.dp-btn:hover{background:var(--amber);color:#fff;border-color:var(--amber)}

/* prompt library filter bar */
.lib-filter{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:6px 0 22px;font-family:"Space Mono",monospace}
.lib-filter .lib-count{font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2);margin-left:6px}

/* footer: prompt-collection links */
.footlinks{display:flex;flex-wrap:wrap;gap:10px 22px;margin:8px 0 22px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14)}
.footlinks a{font-family:"Space Mono",monospace;font-size:.72rem;letter-spacing:.04em;color:var(--parchment-2);text-decoration:none}
.footlinks a:hover{color:var(--amber-soft)}

/* ===== sign-in page ===== */
.authwrap{min-height:72vh;display:flex;align-items:center;justify-content:center;padding-block:clamp(40px,8vw,90px)}
.authcard{width:100%;max-width:440px;background:var(--cream);border:2px solid var(--ink);padding:clamp(24px,4vw,38px)}
.authcard .auth-h{font-size:clamp(1.7rem,4vw,2.3rem);margin:.3em 0 .35em;line-height:1.05}
.authcard .auth-sub{font-size:.98rem;color:var(--ink-2);margin:0 0 22px}
.auth-step{display:flex;flex-direction:column;gap:14px}
.auth-step[hidden]{display:none}
.auth-step .field{display:flex;flex-direction:column;gap:6px}
.auth-step .field span{font-family:"Space Mono",monospace;font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2)}
.auth-step .btn.primary{justify-content:center;width:100%;padding:14px}
.auth-to{font-size:.92rem;color:var(--ink-2);margin:0}
#code{font-family:"Space Mono",monospace;letter-spacing:.5em;font-size:1.2rem;text-align:center}
.auth-actions{margin:2px 0 0;font-size:.85rem;color:var(--ink-2)}
.linkbtn{background:none;border:none;color:var(--amber);font:inherit;cursor:pointer;padding:0;text-decoration:underline;text-underline-offset:3px}
.linkbtn:hover{color:var(--ink)}
.auth-msg{min-height:1.1em;margin:2px 0 0;font-size:.9rem;color:var(--rust);font-weight:600}
.auth-fine{margin:20px 0 0;padding-top:16px;border-top:1px solid var(--line);font-size:.8rem;color:var(--ink-2)}

/* ===== immersive class shell ===== */
.classtop{position:sticky;top:0;z-index:50;background:#e6e5e0;border-bottom:2px solid var(--ink)}
.classtop-in{max-width:var(--maxw);margin-inline:auto;padding:11px clamp(16px,4vw,40px);display:flex;align-items:center;gap:16px}
.classprog{display:flex;align-items:center;gap:9px;margin-left:auto}
.classprog-label{font-family:"Space Mono",monospace;font-size:.72rem;color:var(--ink-2);white-space:nowrap}
.classprog-track{width:110px;height:7px;background:var(--parchment-2);border:1px solid var(--ink)}
.classprog-fill{height:100%;background:var(--amber);width:0;transition:width .3s var(--ease)}
.classuser{display:flex;align-items:center;gap:10px}
.classwho{font-family:"Space Mono",monospace;font-size:.68rem;letter-spacing:.04em;text-transform:uppercase;color:var(--teal)}

.stepper{display:flex;gap:0;overflow-x:auto;border-top:1px solid var(--line);max-width:var(--maxw);margin-inline:auto;padding:0 clamp(10px,3vw,32px)}
.stepper::-webkit-scrollbar{height:0}
.step{flex:0 0 auto;display:flex;align-items:center;gap:8px;background:none;border:none;border-bottom:3px solid transparent;padding:9px 13px;cursor:pointer;font-family:"Space Mono",monospace;font-size:.7rem;color:var(--ink-2);white-space:nowrap;max-width:190px;transition:color .15s}
.step .step-n{display:inline-grid;place-items:center;width:21px;height:21px;border:1.5px solid var(--ink-2);border-radius:50%;font-size:.64rem;flex:0 0 auto}
.step .step-t{overflow:hidden;text-overflow:ellipsis}
.step:hover{color:var(--ink)}
.step.cur{color:var(--ink);border-bottom-color:var(--amber)}
.step.cur .step-n{border-color:var(--amber);background:var(--amber);color:#fff}
.step.done .step-n{border-color:var(--teal);background:var(--teal);color:#fff}

.classmain{min-height:62vh}
.classmain .module{display:none}
.classmain .module.active{display:block}
.classmain .module > .wrap, .classmain section.module{animation:modin .35s var(--ease)}
@keyframes modin{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.classmain section.module{animation:none}}
.modnav{max-width:var(--maxw);margin:6px auto 64px;padding:22px clamp(16px,4vw,40px) 0;display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line)}
.modnav .btn{min-width:120px;justify-content:center}
@media(max-width:620px){
  .classprog-track{width:80px}
  .classwho{display:none}
  .step .step-t{max-width:120px}
}

/* nav "Start the class" button */
.topnav .nav-cta{background:var(--ink);color:var(--parchment) !important;border:1.5px solid var(--ink);padding:7px 13px}
.topnav .nav-cta:hover{background:var(--amber);border-color:var(--amber);color:#fff !important}