@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
  --paper:#f2eee6;
  --paper-2:#fbf9f4;
  --ink:#141517;
  --muted:#77736d;
  --line:rgba(20,21,23,.24);
  --accent:#ff5b35;
  --accent-soft:#ffe4da;
  --dark:#17191d;
  --white:#fff;
  --max:1180px;
  --display:"Space Grotesk",Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{background:var(--paper);scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:var(--display);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
.library-wrap{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.library-nav-shell{position:sticky;top:0;z-index:20;background:rgba(242,238,230,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--ink)}
.library-nav{min-height:64px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}
.library-brand{width:max-content;font-size:24px;font-weight:700;letter-spacing:-.065em}
.library-brand small{margin-left:7px;font-family:var(--mono);font-size:8px;letter-spacing:.08em}
.library-links{display:flex;align-items:center;justify-content:center;gap:24px;font-family:var(--mono);font-size:9px;text-transform:uppercase;color:var(--muted)}
.library-links a:hover{color:var(--ink)}
.library-home-link{justify-self:end;font-family:var(--mono);font-size:9px;text-transform:uppercase;border-bottom:1px solid var(--ink)}
.page-hero{border-bottom:1px solid var(--ink)}
.page-hero-inner{padding:72px 0 56px;display:grid;grid-template-columns:minmax(0,1.45fr) minmax(280px,.55fr);gap:56px;align-items:end}
.eyebrow{font-family:var(--mono);font-size:10px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:18px}
.page-hero h1{margin:0;font-size:clamp(52px,8vw,104px);line-height:.9;letter-spacing:-.065em;max-width:930px}
.page-hero-copy{font-size:18px;line-height:1.5;max-width:440px}
.page-hero-copy p{margin:0 0 18px}
.open-pill{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border:1px solid var(--ink);border-radius:999px;font-family:var(--mono);font-size:9px;text-transform:uppercase;background:var(--paper-2)}
.open-pill::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.section{padding:56px 0;border-bottom:1px solid var(--ink)}
.section-head{display:grid;grid-template-columns:180px 1fr;gap:30px;margin-bottom:30px}
.section-id{font-family:var(--mono);font-size:10px;text-transform:uppercase;color:var(--muted);padding-top:7px}
.section h2{margin:0;font-size:clamp(30px,4vw,52px);line-height:1;letter-spacing:-.045em}
.section-intro{max-width:760px;font-size:18px;line-height:1.55;margin:18px 0 0}
.day-block+.day-block{margin-top:42px}
.day-label{font-family:var(--mono);font-size:10px;text-transform:uppercase;color:var(--muted);margin-bottom:13px}
.session-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}
.session-card{min-height:260px;padding:24px;display:flex;flex-direction:column;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--paper-2);transition:background .15s ease,transform .15s ease}
.session-card:hover{background:var(--accent-soft)}
.session-meta{display:flex;justify-content:space-between;gap:12px;font-family:var(--mono);font-size:9px;color:var(--muted);text-transform:uppercase}
.session-card h3{font-size:25px;line-height:1.05;letter-spacing:-.035em;margin:40px 0 12px}
.session-card p{margin:0;color:#4f4c47;line-height:1.5;font-size:14px}
.card-link{margin-top:auto;padding-top:22px;font-family:var(--mono);font-size:9px;text-transform:uppercase}
.simple-grid{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}
.simple-card{padding:26px;min-height:180px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--paper-2)}
.simple-card h3{margin:0 0 10px;font-size:24px;letter-spacing:-.035em}
.simple-card p{margin:0;color:#595651;line-height:1.55}
.framework-line{display:grid;grid-template-columns:repeat(7,1fr);border:1px solid var(--ink);background:var(--paper-2)}
.framework-line span{padding:18px 10px;text-align:center;border-right:1px solid var(--ink);font-family:var(--mono);font-size:9px;text-transform:uppercase}
.framework-line span:last-child{border-right:0}
.lesson-hero{padding:54px 0 44px;border-bottom:1px solid var(--ink)}
.breadcrumbs{font-family:var(--mono);font-size:9px;text-transform:uppercase;color:var(--muted);margin-bottom:28px}
.breadcrumbs a{text-decoration:underline;text-underline-offset:3px}
.lesson-kicker{display:flex;gap:12px;align-items:center;font-family:var(--mono);font-size:10px;text-transform:uppercase;color:var(--muted)}
.lesson-kicker .number{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border:1px solid var(--ink);border-radius:50%;color:var(--ink)}
.lesson-hero h1{margin:24px 0 18px;font-size:clamp(46px,7vw,86px);line-height:.94;letter-spacing:-.055em;max-width:1000px}
.lesson-promise{max-width:760px;font-size:20px;line-height:1.5;margin:0}
.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:52px}
.lesson-main h2,.lesson-side h2{margin:0 0 20px;font-size:30px;letter-spacing:-.04em}
.lesson-main ul{margin:0;padding-left:20px}
.lesson-main li{margin:0 0 12px;line-height:1.55}
.material-list{display:grid;border-top:1px solid var(--ink)}
.material-item{padding:18px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:24px;align-items:center}
.material-item strong{font-size:16px}
.material-status{font-family:var(--mono);font-size:9px;text-transform:uppercase;color:var(--muted);white-space:nowrap}
.keep-box{padding:24px;border:1px solid var(--ink);background:var(--accent-soft);margin-top:30px}
.keep-box .label{font-family:var(--mono);font-size:9px;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.keep-box p{margin:0;font-size:23px;line-height:1.3;letter-spacing:-.025em}
.class-flow{display:grid;gap:0;border-top:1px solid var(--ink)}
.flow-row{display:grid;grid-template-columns:120px 1fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--line)}
.flow-row span:first-child{font-family:var(--mono);font-size:9px;text-transform:uppercase;color:var(--muted)}
.flow-row span:last-child{font-size:14px;line-height:1.45}
.lesson-nav{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink)}
.lesson-nav a{padding:25px 0;min-height:110px;display:flex;flex-direction:column;gap:7px}
.lesson-nav a:last-child{text-align:right;border-left:1px solid var(--ink);padding-left:24px}
.lesson-nav a:first-child{padding-right:24px}
.lesson-nav .label{font-family:var(--mono);font-size:9px;text-transform:uppercase;color:var(--muted)}
.lesson-nav strong{font-size:17px}
.library-footer{background:var(--dark);color:var(--white);padding:42px 0}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:40px}
.footer-grid strong{font-size:20px}
.footer-grid p{color:rgba(255,255,255,.62);max-width:360px;line-height:1.45}
.footer-links{display:flex;flex-direction:column;gap:9px;font-family:var(--mono);font-size:9px;text-transform:uppercase}
.footer-note{font-family:var(--mono);font-size:9px;line-height:1.7;color:rgba(255,255,255,.6);text-transform:uppercase}
.empty-state{padding:34px;border:1px dashed var(--ink);background:var(--paper-2);max-width:760px}
.empty-state h3{margin:0 0 8px;font-size:25px}
.empty-state p{margin:0;color:var(--muted);line-height:1.55}
@media(max-width:900px){
  .library-nav{grid-template-columns:1fr auto;gap:0 20px;padding-top:10px}
  .library-links{grid-column:1/-1;display:flex;justify-content:flex-start;gap:18px;min-height:42px;margin-top:10px;border-top:1px solid var(--line);overflow-x:auto;scrollbar-width:thin}
  .page-hero-inner{grid-template-columns:1fr;gap:24px}
  .session-grid{grid-template-columns:repeat(2,1fr)}
  .lesson-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-note{grid-column:1/-1}
}
@media(max-width:620px){
  .library-wrap{width:min(calc(100% - 24px),var(--max))}
  .library-home-link{display:none}
  .library-nav{grid-template-columns:1fr;padding-top:9px}
  .library-links{gap:15px}
  .page-hero-inner{padding:48px 0 38px}
  .page-hero h1{font-size:clamp(44px,15vw,70px)}
  .section{padding:42px 0}.section-head{grid-template-columns:1fr;gap:8px}
  .session-grid,.simple-grid{grid-template-columns:1fr}
  .framework-line{grid-template-columns:1fr}
  .framework-line span{border-right:0;border-bottom:1px solid var(--ink);text-align:left}
  .framework-line span:last-child{border-bottom:0}
  .lesson-hero h1{font-size:clamp(42px,13vw,64px)}
  .lesson-nav{grid-template-columns:1fr}.lesson-nav a:last-child{border-left:0;border-top:1px solid var(--ink);text-align:left;padding-left:0}
  .footer-grid{grid-template-columns:1fr}
}
/* =========================================================
   COURSE MAP / SESSION FINDER
========================================================== */
.section-action{margin:18px 0 0;font-family:var(--mono);font-size:10px;text-transform:uppercase}
.section-action a{border-bottom:1px solid var(--ink)}
.problem-list{border-top:1px solid var(--ink)}
.problem-list a{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;padding:20px 0;border-bottom:1px solid var(--line);transition:padding-left .15s ease,background .15s ease}
.problem-list a:hover{padding-left:12px;background:rgba(255,255,255,.28)}
.problem-list span{font-size:20px;letter-spacing:-.02em}
.problem-list strong{font-family:var(--mono);font-size:9px;text-transform:uppercase;white-space:nowrap}
.session-rail-shell{border-bottom:1px solid var(--ink);background:var(--paper-2)}
.session-rail{display:flex;align-items:stretch;overflow-x:auto;scrollbar-width:thin}
.session-rail-map,.session-rail-item{min-height:54px;display:flex;align-items:center;gap:8px;border-right:1px solid var(--line);padding:0 14px;white-space:nowrap;font-family:var(--mono);font-size:9px;text-transform:uppercase}
.session-rail-map{font-weight:600;padding-left:0}
.session-rail-item span{color:var(--muted)}
.session-rail-item strong{font-size:9px}
.session-rail-item.is-active{background:var(--accent);color:var(--ink)}
.session-rail-item.is-active span{color:var(--ink)}
.material-note{margin:16px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
@media(max-width:620px){
  .problem-list a{grid-template-columns:1fr;gap:8px;padding:17px 0}
  .problem-list a:hover{padding-left:0}
  .problem-list span{font-size:17px}
  .session-rail{width:100%;padding-right:12px}
  .session-rail-map,.session-rail-item{min-height:50px;padding:0 11px}
  .session-rail-map{padding-left:0}
}
@media print{
  :root{--paper:#fff;--paper-2:#fff;--ink:#000;--muted:#444}
  .library-nav-shell,.library-footer,.session-rail-shell,.lesson-nav{display:none!important}
  .library-wrap{width:100%;max-width:none}
  .lesson-hero,.section{padding:22px 0}
  .lesson-hero h1{font-size:38pt}
  .lesson-layout{grid-template-columns:1fr}
  .keep-box{break-inside:avoid;background:#fff}
  a{text-decoration:none}
}

/* =========================================================
   SESSION SYLLABUS DETAILS
========================================================== */
.delivery-note{margin:22px 0 0;max-width:760px;color:var(--muted);font-size:13px;line-height:1.55}
.bite-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}
.bite-card{min-height:150px;padding:22px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--paper-2);display:flex;flex-direction:column;gap:28px}
.bite-card span{font-family:var(--mono);font-size:9px;color:var(--muted);text-transform:uppercase}
.bite-card strong{font-size:20px;line-height:1.15;letter-spacing:-.025em}
.artifact-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--ink)}
.artifact-list li{padding:14px 0;border-bottom:1px solid var(--line);font-size:14px;line-height:1.45}
@media(max-width:720px){.bite-grid{grid-template-columns:1fr}.bite-card{min-height:0}}

/* =========================================================
   OPEN WORKSHEETS
========================================================== */
.worksheet-section{background:var(--dark);color:var(--white)}
.worksheet-section .section-id,.worksheet-section .section-intro{color:rgba(255,255,255,.62)}
.worksheet-template{margin:0;padding:26px;border:1px solid rgba(255,255,255,.3);background:#0f1012;color:#f7f4ee;font-family:var(--mono);font-size:13px;line-height:1.75;white-space:pre-wrap;overflow-wrap:anywhere;overflow-x:auto}
.material-item[href]{transition:padding-left .15s ease,background .15s ease}
.material-item[href]:hover{padding-left:8px;background:rgba(255,255,255,.35)}
.material-live{color:var(--ink);font-weight:600}
@media print{
  .worksheet-section{background:#fff!important;color:#000!important}
  .worksheet-section .section-id,.worksheet-section .section-intro{color:#444!important}
  .worksheet-template{background:#fff!important;color:#000!important;border:1px solid #000;white-space:pre-wrap}
}

/* =========================================================
   ACCESSIBILITY
========================================================== */
.skip-link{position:fixed;left:12px;top:12px;z-index:1000;padding:10px 14px;background:var(--ink);color:var(--white);font-family:var(--mono);font-size:10px;text-transform:uppercase;transform:translateY(-160%);transition:transform .15s ease}
.skip-link:focus{transform:translateY(0)}

/* =========================================================
   OPEN PARTICIPANT WORKBOOK
========================================================== */
.simple-card-link{display:flex;flex-direction:column}
.simple-card-link .card-link{margin-top:auto}
.workbook-jump-shell{position:sticky;top:64px;z-index:15;background:var(--paper-2);border-bottom:1px solid var(--ink)}
.workbook-jump{display:flex;overflow-x:auto;scrollbar-width:thin}
.workbook-jump a{min-height:46px;display:flex;align-items:center;padding:0 13px;border-right:1px solid var(--line);font-family:var(--mono);font-size:9px;text-transform:uppercase;white-space:nowrap}
.workbook-jump a:first-child{padding-left:0}
.workbook-head{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:end;margin-bottom:24px}
.workbook-head h2{margin:0;font-size:clamp(28px,4vw,48px);letter-spacing:-.04em}
.workbook-head>a{font-family:var(--mono);font-size:9px;text-transform:uppercase;border-bottom:1px solid currentColor}
.workbook-template{max-width:920px}
.final-proof-section{background:var(--accent-soft)}
.final-proof-section .worksheet-template{background:var(--paper-2);color:var(--ink);border-color:var(--ink)}
.material-repair{color:#9a3f22}
@media(max-width:900px){.workbook-jump-shell{top:106px}}
@media(max-width:620px){
  .workbook-jump-shell{position:static}
  .workbook-head{grid-template-columns:1fr;align-items:start}
}
@media print{
  .workbook-jump-shell{display:none!important}
  .workbook-section{break-before:page}
  .workbook-section:first-of-type{break-before:auto}
  .workbook-head>a{display:none}
}