:root{--bone: #F0EEE6;--paper: #FDFCFA;--ink: #191817;--ink-soft: #605B52;--ink-faint: #9C968A;--rule: #DFDBD1;--clay: #D97757;--clay-deep: #C05F3E;--sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--gut: clamp(20px, 5.5vw, 40px);--max: 620px;--fs-h1: clamp(1.62rem, 6vw, 2.3rem);--fs-h2: clamp(1.3rem, 4.9vw, 1.68rem);--fs-h3: clamp(1.16rem, 4.4vw, 1.4rem);--fs-lead: clamp(1.06rem, 3.8vw, 1.16rem);--fs-body: clamp(1rem, 3.5vw, 1.07rem);--fs-sm: .9rem;--fs-tag: .76rem}astro-dev-toolbar{display:none!important}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{background:var(--bone);color:var(--ink);font-family:var(--sans);line-height:1.8;font-size:17px;-webkit-font-smoothing:antialiased}.wrap{max-width:calc(var(--max) + var(--gut) * 2);margin:0 auto;padding:0 var(--gut)}#bar{position:fixed;top:0;left:0;height:2px;width:0;background:var(--clay);z-index:50;transition:width .1s linear}.top{display:flex;justify-content:space-between;align-items:baseline;padding:clamp(22px,6vw,34px) 0 0}.brand{font-size:var(--fs-lead);letter-spacing:.04em;font-weight:600;color:var(--ink);text-decoration:none}.back{font-size:var(--fs-sm);color:var(--ink-soft);text-decoration:none;min-height:44px;display:inline-flex;align-items:center}.back:hover{color:var(--clay)}.bookhead{margin:clamp(40px,10vw,64px) 0 clamp(30px,7vw,46px)}.bookhead h1{font-size:var(--fs-h1);font-weight:600;line-height:1.3;margin-bottom:10px}.bookhead .booksub{color:var(--ink-soft)}.opening{padding:clamp(54px,14vw,100px) 0 0}.opening .lead{font-size:var(--fs-body);color:var(--ink)}.opening ul{list-style:none;margin:clamp(20px,4.6vw,28px) 0}.opening ul li{font-size:var(--fs-body);color:var(--ink-soft);padding-left:18px;position:relative}.opening ul li:before{content:"";position:absolute;left:0;top:.95em;width:6px;height:1px;background:var(--ink-faint)}.opening .q{font-size:var(--fs-body);margin-top:clamp(18px,4vw,24px)}.thesis{margin:clamp(50px,12vw,88px) 0 clamp(28px,6vw,40px)}.thesis h1{font-size:var(--fs-h1);font-weight:500;line-height:1.45;letter-spacing:.005em;padding-top:clamp(24px,5vw,34px);border-top:2px solid var(--ink)}p{margin-bottom:1.2rem;font-size:var(--fs-body);line-height:1.8}strong{font-weight:600}.live{background:var(--paper);border-radius:14px;padding:clamp(24px,5.6vw,34px) clamp(16px,4.2vw,30px) clamp(16px,3.6vw,24px);margin:clamp(26px,6vw,38px) 0}.live-hint{font-size:var(--fs-sm);letter-spacing:.12em;color:var(--ink-faint);margin:4px 0 0}.examples-head{margin:clamp(54px,13vw,92px) 0 clamp(8px,2vw,14px);font-size:var(--fs-tag);letter-spacing:.2em;text-transform:uppercase;color:var(--ink-faint);font-weight:600}.eg{padding:clamp(36px,8.5vw,60px) 0;border-top:1px solid var(--rule)}.eg-no{font-size:var(--fs-tag);font-weight:700;color:var(--clay);letter-spacing:.1em;display:block;margin-bottom:10px}.eg h3{font-size:var(--fs-h3);font-weight:600;line-height:1.5;margin-bottom:clamp(14px,3vw,20px)}figure{margin:clamp(22px,5vw,32px) 0}figure img{display:block;width:100%;height:auto;border-radius:10px;cursor:zoom-in}#lightbox{position:fixed;inset:0;z-index:100;display:none;background:#191817e0;padding:16px;align-items:center;justify-content:center}#lightbox.on{display:flex}#lightbox img{max-width:100%;max-height:90vh;border-radius:8px;cursor:zoom-out}#lightbox .tip{position:absolute;bottom:calc(20px + env(safe-area-inset-bottom));left:0;right:0;text-align:center;color:#fffdf9b3;font-size:var(--fs-sm);letter-spacing:.1em}.cost{margin-top:clamp(20px,4.4vw,28px);padding:clamp(16px,3.6vw,22px) clamp(18px,4vw,24px);background:#d9775712;border-radius:12px}.cost strong{color:var(--clay-deep);font-weight:700}.cost p{margin:0;font-size:var(--fs-body);line-height:1.75}.sec{padding:clamp(46px,11vw,80px) 0 0;border-top:1px solid var(--rule);margin-top:clamp(38px,9vw,64px)}.sec h2{font-size:var(--fs-h2);font-weight:600;line-height:1.4;margin-bottom:clamp(16px,3.4vw,24px)}.exits{list-style:none;margin-top:clamp(22px,5vw,32px);display:grid;gap:12px}.exits li{background:var(--paper);border:1px solid var(--rule);border-radius:14px;padding:clamp(18px,4.2vw,24px);font-size:var(--fs-body);line-height:1.75}.exits a{color:var(--ink);text-decoration:none;font-weight:600;border-bottom:1.5px solid var(--clay);padding-bottom:1px}.exits a:hover{color:var(--clay)}.exits .soon{color:var(--ink-faint);font-weight:600;white-space:nowrap}.closing{font-size:var(--fs-body);margin:clamp(34px,8vw,52px) 0 0;padding-top:clamp(24px,5.5vw,34px);border-top:1px solid var(--rule)}.buy{background:var(--paper);border:1px solid var(--rule);border-radius:16px;padding:clamp(28px,6.6vw,42px);margin-top:clamp(44px,10vw,74px);box-shadow:0 1px 2px #19181706,0 10px 28px -22px #19181729}.kicker{display:block;font-size:var(--fs-tag);letter-spacing:.18em;text-transform:uppercase;color:var(--clay);font-weight:700;margin-bottom:10px}.buy h4{font-size:var(--fs-h2);font-weight:600;line-height:1.35;margin-bottom:8px}.buy .sub{color:var(--ink-soft);font-size:var(--fs-body)}.acts{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(22px,5vw,30px)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 30px;border-radius:10px;font-size:var(--fs-body);font-weight:600;text-decoration:none;white-space:nowrap;transition:background .18s ease,transform .18s ease,gap .2s ease,border-color .18s ease}.btn-outline{color:var(--ink);border:1px solid var(--rule)}.btn-outline:hover{border-color:var(--ink-faint);transform:translateY(-1px);gap:13px}.btn-soon{color:var(--ink-faint);border:1px dashed var(--rule);cursor:default}footer{margin-top:clamp(50px,12vw,86px);padding:24px 0 calc(34px + env(safe-area-inset-bottom));border-top:1px solid var(--rule);display:flex;justify-content:space-between;align-items:center;font-size:var(--fs-sm);color:var(--ink-faint)}footer a{color:var(--ink-faint);text-decoration:none}footer a:hover{color:var(--clay)}