:root{
 --ink:#2c2926;
 --brown:#3a3028;
 --paper:#f7f0df;
 --paper2:#efe3c8;
 --cream:#e9dfcf;
 --rust:#8b5e3c;
 --line:#b7a489;
 --shadow:0 28px 80px rgba(42,35,28,.26);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,sans-serif;color:var(--ink);background:#4a4037}
body{background:linear-gradient(rgba(54,47,41,.94),rgba(54,47,41,.94)),radial-gradient(circle at 20% 10%,#75685c,#332d28 70%)}
.grain{position:fixed;inset:0;pointer-events:none;opacity:.16;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.32'/%3E%3C/svg%3E")}
.masthead{height:66px;padding:0 5vw;display:flex;align-items:center;justify-content:space-between;color:#e8dcc7;border-bottom:1px solid rgba(255,255,255,.13);font-size:11px;letter-spacing:.16em}
.brand{font-family:"Libre Caslon Text",serif;font-size:17px;letter-spacing:.12em}
main{min-height:calc(100vh - 122px)}
.screen{display:none;min-height:calc(100vh - 122px)}
.screen.active{display:grid}
.cover{place-items:center;padding:40px 18px}
.desk-scene{width:min(1040px,100%);display:grid;place-items:center}
.typewriter{width:min(860px,100%);position:relative;padding-bottom:175px}
.paper-cover,.paper-sheet{background:linear-gradient(90deg,rgba(110,86,56,.05),transparent 15%,transparent 85%,rgba(110,86,56,.05)),var(--paper);box-shadow:var(--shadow);border:1px solid #d2c2a8}
.paper-cover{width:min(690px,88%);margin:auto;padding:70px 70px 82px;text-align:center;min-height:560px;position:relative;z-index:2}
.paper-cover:before,.paper-sheet:before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(95,74,50,.035) 1px,transparent 1px);background-size:100% 28px}
.smallcaps{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--rust)}
h1,h2,.name,.chapter-name{font-family:"Libre Caslon Text",serif}
h1{font-size:clamp(54px,8vw,84px);line-height:.92;margin:20px 0 8px;font-weight:700}
.deck{font-family:"IBM Plex Mono",monospace;text-transform:uppercase;letter-spacing:.13em;font-size:14px}
.rule{height:1px;background:var(--rust);width:74px;margin:28px auto}
.name{font-size:31px;font-style:italic;margin:0 0 28px}
.letter{font-family:"Libre Caslon Text",serif;font-size:20px;line-height:1.55;max-width:520px;margin:0 auto 34px}
.machine,.typewriter-base{position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:100%;z-index:1}
.roller{height:25px;background:#1f1b18;border-radius:12px;box-shadow:inset 0 0 0 5px #2c2723,0 8px 10px rgba(0,0,0,.25)}
.body{background:linear-gradient(#75675b,#4e443b);border-radius:18px 18px 42px 42px;padding:28px 54px 30px;box-shadow:0 18px 36px rgba(0,0,0,.35)}
.keys,.keybed{display:grid;grid-template-columns:repeat(12,1fr);gap:10px}
.keys span,.keybed i{height:22px;border-radius:50%;background:#eee3ce;border:4px solid #2c2824;box-shadow:0 2px 0 #171411}
.spacebar,.bar{height:14px;width:45%;margin:16px auto 0;background:#d8cbb6;border:4px solid #2c2824;border-radius:6px}
.primary,.secondary{border:none;padding:14px 20px;font-weight:600;letter-spacing:.02em;cursor:pointer}
.primary{background:var(--brown);color:#fff}
.secondary{background:transparent;border:1px solid var(--brown);color:var(--brown)}
.linkbtn{background:none;border:none;text-decoration:underline;color:var(--brown);padding:12px;cursor:pointer}
.writing-screen{padding:34px 4vw}
.workspace{width:min(1180px,100%);margin:auto;display:grid;grid-template-columns:250px 1fr;gap:32px;align-items:start}
.margin-notes{color:#e7dcc8;padding-top:70px}
.chapter-tag{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.17em;text-transform:uppercase;color:#cfb999}
.chapter-name{font-size:34px;line-height:1.05;margin:12px 0 26px}
.progress-copy{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#c9baa6}
.progress-line{height:2px;background:rgba(255,255,255,.18);margin:10px 0 28px}
.progress-line span{display:block;height:100%;background:#d0b58f;width:0;transition:width .25s}
.editor-note{font-family:"Libre Caslon Text",serif;font-size:17px;line-height:1.55;color:#d6c8b5}
.typewriter-stage{position:relative;padding-bottom:150px}
.paper-sheet{position:relative;width:min(760px,100%);margin:auto;min-height:650px;z-index:2}
.paper-inner{position:relative;z-index:1;padding:62px 68px 48px}
.question-number{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--rust)}
.paper-inner h2{font-size:clamp(31px,4.2vw,48px);line-height:1.1;margin:18px 0 10px}
.paper-inner p{font-family:"Libre Caslon Text",serif;font-size:18px;line-height:1.55;color:#5f554b}
textarea{width:100%;min-height:290px;border:none;border-top:1px solid #c9b99e;border-bottom:1px solid #c9b99e;background:transparent;resize:vertical;padding:20px 4px;font-family:"IBM Plex Mono",monospace;font-size:16px;line-height:1.75;color:#2c2926;outline:none}
.saved{font-size:11px;color:#776a5d;text-align:right;margin:9px 0 24px}
.controls{display:flex;justify-content:space-between;gap:14px}
.paper-inner .linkbtn{display:block;margin:10px auto 0}
.typewriter-base{bottom:0}
.roller-line{height:22px;background:#1c1916;border-radius:11px}
.keybed{background:linear-gradient(#74685d,#50463d);padding:24px 40px 20px;border-radius:14px 14px 35px 35px}
.keybed i{height:18px}
.transition,.completion{place-items:center;padding:40px 18px}
.chapter-page,.final-page{width:min(720px,100%);background:var(--paper);padding:75px 68px;text-align:center;box-shadow:var(--shadow);position:relative}
.chapter-page h2,.final-page h2{font-size:clamp(45px,6vw,72px);margin:18px 0}
.chapter-page p,.final-page p{font-family:"Libre Caslon Text",serif;font-size:20px;line-height:1.55}
.final-actions{display:flex;flex-direction:column;gap:12px;max-width:330px;margin:28px auto 0}
.danger{color:#8b3d35}
footer{height:56px;padding:0 5vw;display:flex;align-items:center;justify-content:space-between;color:#d7c9b5;border-top:1px solid rgba(255,255,255,.12);font-size:11px;letter-spacing:.11em;text-transform:uppercase}
@media(max-width:820px){
 .edition{display:none}
 .paper-cover{padding:48px 28px 60px;width:94%;min-height:520px}
 .typewriter{padding-bottom:130px}
 .body{padding:22px 22px 24px}
 .keys{gap:5px}
 .keys span{height:17px;border-width:3px}
 .workspace{grid-template-columns:1fr}
 .margin-notes{padding-top:0}
 .chapter-name{font-size:28px}
 .editor-note{display:none}
 .paper-inner{padding:44px 24px 36px}
 .paper-sheet{min-height:620px}
 .controls{flex-direction:column-reverse}
 .controls button{width:100%}
 .typewriter-stage{padding-bottom:110px}
 .keybed{padding:18px;gap:5px}
 .keybed i{height:13px;border-width:3px}
 footer{height:auto;padding-top:18px;padding-bottom:18px;flex-direction:column;gap:10px;align-items:flex-start}
}

/* Final client-ready refinements */
.letter{white-space:pre-line}
button:focus-visible,textarea:focus-visible{outline:3px solid #c89b70;outline-offset:3px}
button:disabled{opacity:.45;cursor:not-allowed}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}