:root{--ink: #1d1d1f;--ink-2: #6e6e73;--ink-3: #86868b;--bg: #ffffff;--bg-2: #f5f5f7;--line: #d2d2d7;--line-soft: #e8e8ed;--accent: #1a7a4b;--accent-press: #135c39;--accent-tint: #eef6f1;--r-lg: 22px;--r-md: 18px;--r-sm: 12px;--r-pill: 980px;--maxw: 1120px;--maxw-text: 720px;--font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Apple SD Gothic Neo", "Pretendard Variable", Pretendard, "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif;--ease: cubic-bezier(.28, .11, .32, 1)}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.5;letter-spacing:-.011em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}.section{padding:clamp(72px,12vw,130px) 0}.section--gray{background:var(--bg-2)}.center{text-align:center}.overline{font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--accent);margin:0 0 16px}.h2{font-size:clamp(28px,4.6vw,48px);font-weight:700;letter-spacing:-.021em;line-height:1.08;margin:0}.lead{font-size:clamp(18px,2.2vw,21px);line-height:1.5;color:var(--ink-2);margin:18px auto 0;max-width:56ch;font-weight:400;letter-spacing:-.012em}.btn{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:500;line-height:1;padding:12px 22px;border-radius:var(--r-pill);background:var(--accent);color:#fff;border:0;cursor:pointer;transition:background .25s var(--ease),transform .15s var(--ease)}.btn:hover{background:var(--accent-press)}.btn:active{transform:scale(.98)}.link{display:inline-flex;align-items:center;gap:3px;font-size:16px;font-weight:500;color:var(--accent);transition:gap .2s var(--ease)}.link:hover{text-decoration:underline;text-underline-offset:3px}.link .chev{transition:transform .2s var(--ease)}.link:hover .chev{transform:translate(2px)}.header{position:sticky;top:0;z-index:100;height:52px;background:#ffffffb8;backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line-soft)}.header__inner{display:flex;align-items:center;justify-content:space-between;height:100%}.brand{display:flex;align-items:center}.brand img{height:26px;width:auto}.nav{display:flex;align-items:center;gap:30px}.nav a{font-size:14px;font-weight:400;color:var(--ink);opacity:.82;transition:opacity .2s var(--ease)}.nav a:hover{opacity:1}.hero{padding:clamp(80px,15vw,150px) 0 clamp(64px,10vw,110px);text-align:center;background:radial-gradient(80% 120% at 50% -10%,var(--accent-tint) 0%,rgba(238,246,241,0) 60%),var(--bg)}.hero__eyebrow{display:inline-flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:0 0 26px}.hero__kw{font-size:12px;font-weight:600;letter-spacing:.02em;color:var(--accent);background:#fff;border:1px solid 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var(--ease)}.filter:hover{color:var(--ink)}.filter.is-active{background:var(--ink);color:#fff}.book-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:76px 48px;align-items:start}.book{display:flex;flex-direction:column}.book__cover{aspect-ratio:1 / 1.5;display:flex;align-items:flex-end;justify-content:center}.book__cover img{max-width:100%;max-height:100%;width:auto;height:auto;display:block;border-radius:var(--r-sm);box-shadow:0 1px 1px #0000000a,0 6px 20px #0000000f;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}.book:hover .book__cover img{transform:translateY(-6px);box-shadow:0 2px 4px #0000000d,0 22px 48px #00000024}.book__body{padding-top:16px;display:flex;flex-direction:column;flex:1}.book__tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:9px}.book__tag{font-size:11px;font-weight:600;letter-spacing:.01em;color:var(--accent);background:var(--accent-tint);border-radius:6px;padding:3px 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