:root{
  --paper:#fbfcfa;--ink:#151d1c;--muted:#68716f;--line:#dfe4e1;
  --navy:#273f78;--red:#b45145;--teal:#2f8877;--gold:#9b7a27;
  --soft-blue:#f2f5fb;--soft-red:#fbf2f0;--soft-green:#eef7f3;--soft-gold:#fbf7e9;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}
button,input,select{font:inherit}
a{color:inherit}
.top-progress{position:fixed;top:0;left:0;right:0;height:3px;background:transparent;z-index:100}
.top-progress span{display:block;height:100%;width:0;background:var(--red)}
.site-header{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 4vw;border-bottom:1px solid var(--line);background:rgba(251,252,250,.94);backdrop-filter:blur(12px);position:sticky;top:0;z-index:20}
.site-brand{text-decoration:none;display:flex;align-items:center;gap:18px}
.brand-code{font-size:12px;letter-spacing:.2em;font-weight:800}
.brand-copy{font-size:11px;line-height:1.45;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.site-header nav{display:flex;gap:28px}.site-header nav a{text-decoration:none;font-size:13px;color:#4f5b58}
.shell{max-width:1120px;margin:auto;padding-left:28px;padding-right:28px}
.editorial-hero{max-width:1120px;margin:0 auto;padding:95px 28px 70px}
.hero-kicker{display:flex;gap:18px;flex-wrap:wrap;font:700 10px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.14em;color:var(--muted)}
.editorial-hero h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:clamp(58px,9vw,104px);line-height:.94;letter-spacing:-.05em;margin:34px 0 28px;max-width:900px}
.editorial-hero h1 em{color:var(--red);font-weight:400}
.hero-lead{font-size:20px;line-height:1.75;max-width:760px;color:#4d5855}
.hero-actions{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
.hero-rule{height:1px;background:var(--ink);max-width:820px;margin:52px 0 30px}
.hero-outcomes{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;max-width:980px}
.hero-outcomes b{font:800 10px ui-monospace,monospace;letter-spacing:.14em;color:var(--red)}
.hero-outcomes p{margin:9px 0 0;font-size:14px;color:#4d5855}
.btn{border:1px solid transparent;border-radius:3px;padding:11px 17px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;transition:.16s}
.btn.ink{background:var(--navy);color:#fff}.btn.ink:hover{transform:translateY(-1px)}
.btn.outline{background:transparent;border-color:#bfc7c4;color:#293330}.btn.outline:hover{border-color:var(--navy)}
.btn.text{background:transparent;border:0;color:var(--navy);padding-left:0;padding-right:0}
.btn.small{padding:8px 12px;font-size:12px}
.section{padding-top:70px;padding-bottom:70px;border-top:1px solid var(--line)}
.section-title>span,.section-label,.mini-label{font:800 10px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.16em;color:var(--red)}
.section-title h2,.footer-bridge h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:42px;line-height:1.12;margin:12px 0}
.section-title p{max-width:760px;color:var(--muted)}
.evidence-key{border-left:3px solid var(--navy);padding-left:28px}
.status-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}
.status{display:inline-block;padding:4px 8px;font:800 10px ui-monospace,monospace;letter-spacing:.08em;border-radius:2px}
.supported{color:#1f6c5d;background:#e8f4ef}.contested{color:#84651e;background:#fbf3d8}.unsupported{color:#9d4037;background:#f8e8e6}
.status-row p{font-size:13px;color:#4d5855}.small-note{font-size:12px;color:var(--muted)}
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px}
.module-card{background:#fff;border:1px solid var(--line);padding:22px;min-height:290px;display:flex;flex-direction:column;box-shadow:0 10px 28px rgba(20,38,34,.035)}
.module-card .module-no{font:800 10px ui-monospace,monospace;letter-spacing:.14em;color:var(--red)}
.module-card h3{font-family:Georgia,"Times New Roman",serif;font-size:27px;line-height:1.15;font-weight:400;margin:16px 0 10px}
.module-card .module-time{font:700 10px ui-monospace,monospace;color:var(--muted);margin-bottom:10px}
.module-card p{font-size:13px;color:#596360;flex:1}
.card-actions{display:flex;gap:8px;align-items:center;margin-top:18px}.points{font-size:10px;color:var(--muted);margin-left:auto}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}
.resource-card{background:#fff;border:1px solid var(--line);padding:22px}
.resource-card h3{font-family:Georgia,"Times New Roman",serif;font-size:24px;font-weight:400;margin:11px 0}
.resource-card p{font-size:13px;color:var(--muted)}
.resource-card audio{width:100%;margin-top:12px}
.helper{max-width:850px;background:#fff;border:1px solid var(--line);padding:22px;margin-top:30px}
.helper-bar{display:flex;justify-content:space-between;gap:16px;align-items:center}.helper-bar select{margin-left:8px;padding:7px;border:1px solid var(--line)}
.prompt-row{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.prompt-chip{border:1px solid var(--line);background:#fff;padding:8px 10px;cursor:pointer;font-size:12px}
.chat-log{min-height:180px;max-height:340px;overflow:auto;border:1px solid var(--line);padding:14px;background:#fcfdfc}
.msg{max-width:82%;padding:9px 12px;margin:7px 0;font-size:13px}.msg.bot{border-left:3px solid var(--navy);background:#f6f8fb}.msg.user{margin-left:auto;background:#eef4f2}
.chat-form{display:flex;margin-top:10px}.chat-form input{flex:1;border:1px solid var(--line);padding:11px}
.score-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px;margin:26px 0}
.score-card{border:1px solid var(--line);background:#fff;padding:17px;text-align:center}.score-card strong{display:block;font-family:Georgia,serif;font-size:28px;font-weight:400}.score-card span{font-size:11px;color:var(--muted)}
.footer-bridge{padding-bottom:100px}.footer-bridge p{max-width:760px;color:var(--muted)}

.reader-dialog{width:100vw;height:100vh;max-width:none;max-height:none;margin:0;padding:0;border:0;background:var(--paper)}
.reader-dialog::backdrop{background:rgba(19,28,27,.45)}
.reader-shell{min-height:100vh;display:grid;grid-template-columns:220px minmax(0,1fr)}
.reader-nav{border-right:1px solid var(--line);padding:30px 22px 30px 30px;position:sticky;top:0;height:100vh;background:#fafbf9;overflow:auto}
.reader-close{position:absolute;right:14px;top:12px;border:0;background:transparent;font-size:26px;color:var(--muted);cursor:pointer}
.reader-brand{font:800 10px/1.4 ui-monospace,monospace;letter-spacing:.15em;margin-bottom:32px}.reader-brand small{display:block;margin-top:7px;color:#79817f;font-weight:500}
.reader-nav nav{display:grid;gap:3px}
.reader-link{display:grid;grid-template-columns:24px 1fr;gap:10px;text-decoration:none;padding:8px 0 8px 8px;border-left:2px solid transparent;color:#69716f;font-size:11px}
.reader-link b{font:500 9px ui-monospace,monospace;color:#9aa19f}.reader-link small{display:block;font-size:9px;color:#a0a7a5;margin-top:2px}
.reader-link.active{border-left-color:var(--red);color:var(--ink)}.reader-link.active b{color:var(--red)}
.reader-time{margin-top:36px;font:500 9px/1.7 ui-monospace,monospace;color:#8a918f}.reader-time b{color:var(--red);letter-spacing:.1em}
.reader-content{max-width:820px;padding:70px 48px 120px;margin:0 auto;width:100%}
.reader-phase{padding:42px 0 70px;border-bottom:1px solid var(--line);scroll-margin-top:20px}
.phase-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;margin-bottom:20px}
.phase-eyebrow{font:800 10px ui-monospace,monospace;letter-spacing:.16em;color:var(--red)}
.phase-time{font:600 9px ui-monospace,monospace;letter-spacing:.12em;color:#8b9391}
.reader-phase h1{font-family:Georgia,"Times New Roman",serif;font-size:58px;line-height:1.02;font-weight:400;letter-spacing:-.035em;margin:10px 0 22px}
.reader-phase h2{font-family:Georgia,"Times New Roman",serif;font-size:34px;line-height:1.12;font-weight:400;margin:30px 0 12px}
.reader-phase h3{font-family:Georgia,"Times New Roman",serif;font-size:23px;font-weight:400;margin:26px 0 10px}
.reader-phase p{font-size:15px;color:#3e4946}
.reader-phase .lead{font-size:17px;line-height:1.75}
.callout{border-left:3px solid var(--navy);padding:14px 18px;margin:24px 0;background:transparent}
.callout.red{border-left-color:var(--red)}.callout.gold{border-left-color:var(--gold)}.callout.teal{border-left-color:var(--teal)}
.callout .callout-label{font:800 9px ui-monospace,monospace;letter-spacing:.15em;color:#65716e}
.callout p{margin:7px 0 0}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-card{border-left:2px solid var(--navy);padding:10px 16px}.compare-card.red{border-left-color:var(--red)}.compare-card.teal{border-left-color:var(--teal)}
.compare-card b{display:block;margin-bottom:6px}
.utterance{border-top:1px solid var(--line);padding:24px 0}.utterance-label{font:700 9px ui-monospace,monospace;letter-spacing:.16em;color:#8a918f}
.quote{font-family:Georgia,"Times New Roman",serif;font-size:21px;line-height:1.45;margin:8px 0 14px}
.choice-row{display:flex;gap:8px;flex-wrap:wrap}.choice-btn{background:#fff;border:1px solid var(--line);padding:8px 12px;font-size:12px;cursor:pointer}.choice-btn.selected{background:var(--navy);border-color:var(--navy);color:#fff}
.reveal{display:none;margin-top:14px}.reveal.show{display:block}
.experiment-box{border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:14px 0;margin:16px 0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;line-height:1.8}
.experiment-inputs{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:14px 0}.experiment-inputs input{border:1px solid var(--line);padding:9px}
.grammar-lines{font-family:ui-monospace,monospace;line-height:1.9;border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:14px 0;margin:15px 0}
.bad{color:var(--red)}
.property-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.property{border-top:2px solid var(--teal);padding:12px 0}.property b{display:block}.property p{font-size:13px;margin:4px 0}
.grammar-ladder{display:grid;gap:8px;margin:18px 0}.grammar-level{display:grid;grid-template-columns:110px 1fr;gap:14px;border-bottom:1px solid var(--line);padding:10px 0}.grammar-level b{color:var(--red)}
.syntax-tree{white-space:pre;font-family:ui-monospace,monospace;font-size:13px;line-height:1.55;border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:16px 0;overflow:auto}
.ledger{display:grid;gap:14px;margin:18px 0}.ledger-item{padding:16px 18px;border-left:4px solid var(--teal);background:#fff}.ledger-item.contested-item{border-left-color:var(--gold)}.ledger-item.unsupported-item{border-left-color:var(--red)}.ledger-item p{margin:7px 0}.citation{font:500 10px ui-monospace,monospace;color:#8b9391}
.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:18px 0}.timeline div{border-top:3px solid var(--navy);padding:10px 7px;font-size:12px}.timeline b{display:block}
.code-switch{font-family:ui-monospace,monospace;border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:14px 0;margin:18px 0}.code-switch .ms{color:#815528}.code-switch .en{color:var(--navy)}.code-switch .part{color:var(--teal)}
.task-list{counter-reset:task;display:grid;gap:18px}.task-step{display:grid;grid-template-columns:30px 1fr 115px;gap:12px;align-items:start}.task-step:before{counter-increment:task;content:counter(task);color:var(--red);font:700 11px ui-monospace,monospace}.task-step strong{font-family:Georgia,serif;font-size:18px;font-weight:400}.task-step aside{font-weight:800;font-size:13px}
.audit-prompt{white-space:pre-wrap;background:#fbfbfa;border-left:3px solid var(--red);padding:18px;font:12px/1.65 ui-monospace,monospace;color:#313b38}
.rubric{width:100%;border-collapse:collapse;margin:20px 0}.rubric th,.rubric td{text-align:left;border-bottom:1px solid var(--line);padding:11px 8px;font-size:12px}.rubric th{font:700 9px ui-monospace,monospace;letter-spacing:.12em;color:#7e8784}.rubric td:last-child{text-align:right}
.deck-notes{margin-top:34px;border-top:1px solid var(--line);padding-top:16px}.deck-notes summary{cursor:pointer;font-weight:800;color:var(--navy);font-size:12px}.deck-slide{padding:14px 0;border-bottom:1px dashed var(--line)}.deck-slide b{font-family:Georgia,serif}.deck-slide p{font-size:12px;color:#64706d;margin:4px 0;white-space:pre-line}
.inline-practice{margin-top:24px}
.activity-dialog{width:min(850px,94vw);max-height:90vh;border:0;padding:30px;overflow:auto}.activity-dialog::backdrop{background:rgba(17,26,24,.5)}
.modal-close{position:sticky;float:right;top:0;border:0;background:#fff;font-size:28px;cursor:pointer}
.question{padding:18px 0;border-bottom:1px solid var(--line)}.question label{display:block;padding:7px 0;cursor:pointer}
.result-box{margin-top:18px;padding:18px;background:var(--soft-green);border-left:3px solid var(--teal)}.result-box>strong{font-family:Georgia,serif;font-size:30px;font-weight:400}
.toast{position:fixed;right:20px;bottom:20px;background:var(--ink);color:#fff;padding:10px 14px;opacity:0;transform:translateY(8px);transition:.2s;z-index:200}.toast.show{opacity:1;transform:none}

@media(max-width:900px){
  .site-header nav{display:none}.hero-outcomes,.status-row,.module-grid,.resource-grid{grid-template-columns:1fr}
  .reader-shell{grid-template-columns:1fr}.reader-nav{position:sticky;height:auto;max-height:none;z-index:5;border-right:0;border-bottom:1px solid var(--line);padding:18px}.reader-nav nav{display:flex;overflow:auto;gap:10px}.reader-link{min-width:140px;border-left:0;border-bottom:2px solid transparent}.reader-link.active{border-left:0;border-bottom-color:var(--red)}
  .reader-brand,.reader-time{display:none}.reader-close{position:fixed;right:12px;top:8px;background:#fff;border:1px solid var(--line);width:36px;height:36px;z-index:9}
  .reader-content{padding:44px 24px 100px}.reader-phase h1{font-size:44px}.two-col,.property-grid,.timeline{grid-template-columns:1fr}.task-step{grid-template-columns:24px 1fr}.task-step aside{grid-column:2}.experiment-inputs{grid-template-columns:1fr}.score-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:560px){
  .site-header{padding:0 16px}.brand-copy{display:none}.editorial-hero{padding:65px 18px 50px}.editorial-hero h1{font-size:54px}.shell{padding-left:18px;padding-right:18px}.section-title h2,.footer-bridge h2{font-size:34px}.score-grid{grid-template-columns:repeat(2,1fr)}
}