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:root{--bg:#f6f6f3;--ink:#171b1c;--muted:#606566;--red:#df362a;--border:#d6d9d6;--dark:#14191b;--green:#b9ccbe;--paper:#fff;--font:"Pretendard","Noto Sans KR","Malgun Gothic",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.8;word-break:keep-all}button,a,input{ -webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}a{color:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #2375c7;outline-offset:5px}img{max-width:100%;height:auto}p,h1,h2,h3,h4{margin:0}p+p{margin-top:1em}button{color:inherit}a{text-decoration:none}.wrap{width:min(1280px,calc(100% - 100px));margin:auto}.skip{position:fixed;top:-100px;background:white;padding:12px;z-index:1000}.skip:focus{top:8px}#progress{position:fixed;left:0;top:0;height:3px;width:0;background:var(--red);z-index:110}header{height:92px;padding:0 50px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(246,246,243,.97);backdrop-filter:blur(14px);z-index:100}.brand{display:flex;gap:14px;align-items:center;line-height:1.4;font-size:17px;font-weight:750}.brand-icon{background:var(--red);color:white;display:grid;place-content:center;width:42px;height:45px;font-size:27px;position:relative;font-family:Arial,sans-serif}.brand-icon span{position:absolute;font-size:19px;right:5px;bottom:4px}.brand small{display:block;letter-spacing:.11em;font-size:10px;margin-top:4px;color:var(--muted)}nav{display:flex;align-items:center;gap:30px;font-size:14px;font-weight:650}nav a:hover{color:var(--red)}.nav-book{border:1px solid 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@media(min-width:1600px){.hero{min-height:800px}}@media(max-width:1050px){.wrap{width:calc(100% - 60px)}header{padding:0 30px}nav{gap:18px}nav a{font-size:12px}.hero{gap:30px}.book-cover{width:245px}.cover-stage{height:510px}.stats{gap:32px}.stats>p{display:none}.video-layout{grid-template-columns:minmax(0,1fr) 210px;gap:28px}.book-section{gap:35px}}@media(max-width:760px){.wrap{width:calc(100% - 40px)}header{height:auto;min-height:76px;padding:16px 20px;gap:15px;flex-wrap:wrap}.brand{font-size:15px}.brand-icon{width:33px;height:36px;font-size:22px}.brand small{font-size:9px}nav{width:100%;overflow-x:auto;white-space:nowrap;gap:24px;padding:4px 0}nav a{font-size:12px}.nav-book{padding:3px 9px}.hero{grid-template-columns:1fr;padding-top:45px;gap:40px;padding-bottom:45px;min-height:0}.hero .eyebrow{font-size:10px}.kicker{font-size:18px}h1{font-size:64px}.subtitle{font-size:21px}.hero-desc{font-size:15px}.cover-stage{height:440px}.book-cover{width:235px}.cover-caption{font-size:11px;bottom:24px;left:22px}.stage-number{font-size:27px;bottom:15px}.stats{gap:28px;min-height:100px;justify-content:space-between}.stats>div{display:block}.stats strong{font-size:30px}.stats span{display:block;font-size:11px}.section{padding:68px 0}.eyebrow{font-size:11px;margin-bottom:20px}.section-heading>p:last-child{font-size:16px}.thesis-grid{grid-template-columns:1fr;gap:35px}.thesis-grid h3{margin:10px 0}.thesis-grid a{margin-top:15px}.reading-note{display:block;padding:18px}.reading-note p{margin-top:10px;font-size:13px}.video-layout{grid-template-columns:1fr;gap:45px}.short-video{max-width:260px}.video-layout h3{font-size:20px}.book-section{display:block}.book-facts{margin-top:40px}.book-facts>div{grid-template-columns:100px 1fr;font-size:13px}footer .wrap{grid-template-columns:1fr}.wide-only{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}