.kb{--kb-red: var(--nk-orange,#e2220d);--kb-ink: #15171b;--kb-text: #33373d;--kb-soft: #6f7680;--kb-line: #ddd7cd;--kb-ease: cubic-bezier(.22,1,.36,1);position: relative;overflow: hidden;isolation: isolate;padding: clamp(3rem,6vw,5.5rem) 0 clamp(3.5rem,7vw,6rem);background: #f4f2ee;color: var(--kb-ink)}.kb a{color: inherit;text-decoration: none}.kb__lines i{position: absolute;z-index: -1;top: 0;bottom: 0;width: 1px;background: rgba(21,23,27,.06)}.kb__lines i:nth-child(1){left: 25%}.kb__lines i:nth-child(2){left: 50%}.kb__lines i:nth-child(3){left: 75%}.kb__grid{display: grid;grid-template-columns: minmax(0,1fr) minmax(0,1fr);gap: clamp(2rem,6vw,6rem);align-items: center}.kb-stage{position: relative;display: grid;place-items: center;padding: clamp(2rem,5vw,4rem) 0 clamp(3rem,6vw,5rem);perspective: 1800px}.kb-stage::before{content: "";position: absolute;z-index: -1;left: 50%;top: 50%;width: 90%;aspect-ratio: 1;transform: translate(-50%,-50%);border-radius: 50%;background: radial-gradient(circle,rgba(226,34,13,.16) 0,rgba(226,34,13,.05) 40%,transparent 70%)}.kb-stage__floor{position: absolute;z-index: -1;left: 50%;bottom: clamp(1.5rem,3vw,2.75rem);width: min(70%,380px);height: 30px;transform: translateX(-50%);border-radius: 50%;background: radial-gradient(ellipse,rgba(21,23,27,.32) 0,transparent 70%);filter: blur(4px);transition: width .8s var(--kb-ease),opacity .8s}.kb-stage__tag{position: absolute;right: clamp(0rem,4vw,3rem);top: clamp(1rem,3vw,2rem);padding: .35rem .7rem;background: var(--kb-ink);color: #fff;font-size: .72rem;font-weight: 600;letter-spacing: .06em}.kb-book{--w: min(68vw,360px);--d: 26px;position: relative;display: block;width: var(--w);aspect-ratio: 210 / 297;transform-style: preserve-3d;transform: rotateY(-28deg) rotateX(6deg) rotateZ(-1deg);transition: transform 1s var(--kb-ease)}.kb-stage:hover .kb-book,.kb-stage:focus-visible .kb-book{transform: rotateY(-8deg) rotateX(2deg) translateY(-8px)}.kb-stage:hover .kb-stage__floor{width: min(78%,420px);opacity: .8}.kb-book__cover{position: absolute;inset: 0;overflow: hidden;background: #fff;transform: translateZ(calc(var(--d) / 2));box-shadow: 0 30px 60px -28px rgba(21,23,27,.55)}.kb-book__cover img{width: 100%;height: 100%;object-fit: cover}.kb-book__cover::before{content: "";position: absolute;inset: 0;z-index: 1;background: linear-gradient(90deg,rgba(0,0,0,.35) 0,rgba(255,255,255,.18) 2.5%,rgba(0,0,0,.12) 5%,transparent 9%),linear-gradient(115deg,transparent 40%,rgba(255,255,255,.22) 50%,transparent 60%);background-size: 100% 100%,250% 100%;background-position: 0 0,120% 0;transition: background-position 1.2s var(--kb-ease);pointer-events: none}.kb-stage:hover .kb-book__cover::before{background-position: 0 0,-40% 0}.kb-book__spine{position: absolute;left: 0;top: 0;width: var(--d);height: 100%;background: linear-gradient(90deg,#1b1d22,#2b2e35 60%,#15171b);transform-origin: left;transform: rotateY(-90deg) translateX(calc(var(--d) / -2))}.kb-book__pages{position: absolute;right: 0;top: 4px;bottom: 4px;width: var(--d);transform-origin: right;transform: rotateY(90deg) translateX(calc(var(--d) / 2));background: repeating-linear-gradient(90deg,#f6f4ef 0 2px,#e2ddd3 2px 3px)}.kb-book--sm{--w: 150px;--d: 14px;transform: rotateY(-22deg) rotateX(4deg)}.kb-eyebrow{display: inline-flex;align-items: center;gap: .75rem;margin: 0;color: var(--kb-red);font-size: .78rem;font-weight: 600;letter-spacing: .06em}.kb-eyebrow::before{content: "";width: 28px;height: 1.5px;background: currentColor}.kb-title{margin: 1rem 0 0;max-width: 18ch;font-size: clamp(1.9rem,3.4vw,3rem);font-weight: 600;line-height: 1.08;letter-spacing: -.02em}.kb-lead{margin: 1.25rem 0 0;max-width: 44ch;color: var(--kb-text);font-size: 1.02rem;line-height: 1.7}.kb-facts{display: grid;grid-template-columns: repeat(auto-fit,minmax(110px,1fr));margin: clamp(1.75rem,3vw,2.5rem) 0 0;border-top: 1px solid var(--kb-line);border-bottom: 1px solid var(--kb-line)}.kb-facts div{padding: 1.1rem 1rem 1.1rem 0}.kb-facts div + div{padding-left: 1rem;border-left: 1px solid var(--kb-line)}.kb-facts dt{color: var(--kb-soft);font-size: .76rem;font-weight: 500}.kb-facts dd{margin: .35rem 0 0;white-space: nowrap;font-size: 1.35rem;font-weight: 600;letter-spacing: -.01em;font-variant-numeric: tabular-nums}.kb-actions{display: flex;flex-wrap: wrap;gap: .75rem;margin-top: clamp(1.75rem,3vw,2.25rem)}.kb-btn{display: inline-flex;align-items: center;gap: .8rem;padding: 1rem 1.4rem;border: 1px solid var(--kb-ink);color: var(--kb-ink);font-size: .9rem;font-weight: 600;transition: background .25s,border-color .25s,color .25s}.kb-btn svg{width: 20px;height: 10px;fill: none;stroke: currentColor;stroke-width: 1.6;transition: transform .3s var(--kb-ease)}.kb-btn .kb-btn__dl{width: 16px;height: 16px;stroke-width: 1.8;stroke-linecap: round;stroke-linejoin: round}.kb-btn:hover{background: var(--kb-ink);color: #fff}.kb-btn--red{background: var(--kb-red);border-color: var(--kb-red);color: #fff}.kb-btn--red:hover{background: var(--kb-ink);border-color: var(--kb-ink)}.kb-btn--red:hover svg{transform: translateX(4px)}.kb-groups,.kb-shelf{margin-top: clamp(3.5rem,7vw,6rem)}.kb-groups__head{display: grid;gap: .8rem;margin-bottom: clamp(1.5rem,3vw,2.25rem)}.kb-groups__head h2{margin: 0;font-size: clamp(1.5rem,2.6vw,2.2rem);font-weight: 600;letter-spacing: -.015em}.kb-groups__list{display: grid;grid-template-columns: repeat(3,minmax(0,1fr));margin: 0;padding: 0;list-style: none;border-top: 1px solid var(--kb-line)}.kb-groups__list li{border-bottom: 1px solid var(--kb-line)}.kb-groups__list li:not(:nth-child(3n + 1)){border-left: 1px solid var(--kb-line)}.kb-groups__list a{position: relative;display: grid;grid-template-columns: auto 1fr auto;align-items: center;column-gap: 1rem;row-gap: .2rem;height: 100%;padding: 1.25rem 1.25rem;transition: background .25s}.kb-groups__list a::before{content: "";position: absolute;left: 0;top: -1px;width: 100%;height: 2px;background: var(--kb-red);transform: scaleX(0);transform-origin: left;transition: transform .5s var(--kb-ease)}.kb-groups__list b{grid-row: 1 / span 2;color: var(--kb-soft);font-size: .78rem;font-weight: 500;font-variant-numeric: tabular-nums;transition: color .25s}.kb-groups__list span{font-size: 1rem;font-weight: 600;line-height: 1.3}.kb-groups__list small{grid-column: 2;color: var(--kb-soft);font-size: .76rem;font-weight: 500}.kb-groups__list svg{grid-column: 3;grid-row: 1 / span 2;width: 20px;height: 10px;fill: none;stroke: currentColor;stroke-width: 1.6;opacity: .45;transition: transform .3s var(--kb-ease),opacity .25s}.kb-groups__list a:hover{background: #fff}.kb-groups__list a:hover::before{transform: scaleX(1)}.kb-groups__list a:hover b{color: var(--kb-red)}.kb-groups__list a:hover svg{opacity: 1;transform: translateX(4px)}.kb-shelf__row{display: flex;flex-wrap: wrap;gap: clamp(1.5rem,4vw,3rem);padding-bottom: 1.5rem;border-bottom: 6px solid #e6e1d8}.kb-shelf__item{display: grid;justify-items: start;gap: .5rem;perspective: 1200px}.kb-shelf__item:hover .kb-book{transform: rotateY(-6deg) translateY(-6px)}.kb-shelf__title{max-width: 18ch;margin-top: 1rem;font-size: .95rem;font-weight: 600}.kb-shelf__meta{color: var(--kb-soft);font-size: .76rem}.kb-empty{padding: 4rem 0;color: var(--kb-soft);text-align: center}@media (max-width: 1024px){.kb-groups__list{grid-template-columns: repeat(2,minmax(0,1fr))}.kb-groups__list li:not(:nth-child(3n + 1)){border-left: 0}.kb-groups__list li:nth-child(even){border-left: 1px solid var(--kb-line)}}@media (max-width: 860px){.kb__grid{grid-template-columns: 1fr}.kb-book{--w: min(62vw,300px)}}@media (max-width: 560px){.kb-groups__list{grid-template-columns: 1fr}.kb-groups__list li:nth-child(even){border-left: 0}}@media (prefers-reduced-motion: reduce){.kb-book,.kb-book__cover::before{transition: none}}