.instruction, .book {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}


body {
    width: 100%;
    height: 100vh;
    min-width: 1500px;
    min-height: 1000px;
    background: #fbecb4;
    position: relative;
}

.book {
    width: 1500px;
    height: 1000px;
    transform: translate(-50%, -50%) rotatex(10deg);
    transform-style: preserve-3d;
}

.page {
    width: 750px;
    position: absolute;
    transition: transform 1s;
    border-right: 1px solid #ddd;
    border-bottom: 1px solid #ddd;
}

.page:nth-child(1) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-1px);
    background: #9bc8d6;
}

.left-side:nth-child(1) {
    transform: translatez(1px) rotatey(-180deg);
}

.page:nth-child(2) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-2px) scalex(-1) translatex(100%);
}

.left-side:nth-child(2) {
    transform: translatez(2px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(3) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-3px);
}

.left-side:nth-child(3) {
    transform: translatez(3px) rotatey(-180deg);
}

.page:nth-child(4) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-4px) scalex(-1) translatex(100%);
}

.left-side:nth-child(4) {
    transform: translatez(4px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(5) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-5px);
}

.left-side:nth-child(5) {
    transform: translatez(5px) rotatey(-180deg);
}

.page:nth-child(6) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-6px) scalex(-1) translatex(100%);
}

.left-side:nth-child(6) {
    transform: translatez(6px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(7) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-7px);
}

.left-side:nth-child(7) {
    transform: translatez(7px) rotatey(-180deg);
}

.page:nth-child(8) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-8px) scalex(-1) translatex(100%);
}

.left-side:nth-child(8) {
    transform: translatez(8px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(9) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-9px);
}

.left-side:nth-child(9) {
    transform: translatez(9px) rotatey(-180deg);
}

.page:nth-child(10) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-10px) scalex(-1) translatex(100%);
}

.left-side:nth-child(10) {
    transform: translatez(10px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(11) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-11px);
}

.left-side:nth-child(11) {
    transform: translatez(11px) rotatey(-180deg);
}

.page:nth-child(12) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-12px) scalex(-1) translatex(100%);
}

.left-side:nth-child(12) {
    transform: translatez(12px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(13) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-13px);
}

.left-side:nth-child(13) {
    transform: translatez(13px) rotatey(-180deg);
}

.page:nth-child(14) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-14px) scalex(-1) translatex(100%);
}

.left-side:nth-child(14) {
    transform: translatez(14px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(15) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-15px);
}

.left-side:nth-child(15) {
    transform: translatez(15px) rotatey(-180deg);
}

.page:nth-child(16) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-16px) scalex(-1) translatex(100%);
}

.left-side:nth-child(16) {
    transform: translatez(16px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(17) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-17px);
}

.left-side:nth-child(17) {
    transform: translatez(17px) rotatey(-180deg);
}

.page:nth-child(18) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-18px) scalex(-1) translatex(100%);
}

.left-side:nth-child(18) {
    transform: translatez(18px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(19) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-19px);
}

.left-side:nth-child(19) {
    transform: translatez(19px) rotatey(-180deg);
}

.page:nth-child(20) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-20px) scalex(-1) translatex(100%);
}

.left-side:nth-child(20) {
    transform: translatez(20px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(21) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-21px);
}

.left-side:nth-child(21) {
    transform: translatez(21px) rotatey(-180deg);
}

.page:nth-child(22) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-22px) scalex(-1) translatex(100%);
}

.left-side:nth-child(22) {
    transform: translatez(22px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(23) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-23px);
}

.left-side:nth-child(23) {
    transform: translatez(23px) rotatey(-180deg);
}

.page:nth-child(24) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-24px) scalex(-1) translatex(100%);
}

.left-side:nth-child(24) {
    transform: translatez(24px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(25) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-25px);
}

.left-side:nth-child(25) {
    transform: translatez(25px) rotatey(-180deg);
}

.page:nth-child(26) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-26px) scalex(-1) translatex(100%);
}

.left-side:nth-child(26) {
    transform: translatez(26px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(27) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-27px);
}

.left-side:nth-child(27) {
    transform: translatez(27px) rotatey(-180deg);
}

.page:nth-child(28) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-28px) scalex(-1) translatex(100%);
}

.left-side:nth-child(28) {
    transform: translatez(28px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(29) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-29px);
}

.left-side:nth-child(29) {
    transform: translatez(29px) rotatey(-180deg);
}

.page:nth-child(30) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-30px) scalex(-1) translatex(100%);
}

.left-side:nth-child(30) {
    transform: translatez(30px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(31) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-31px);
}

.left-side:nth-child(31) {
    transform: translatez(31px) rotatey(-180deg);
}

.page:nth-child(32) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-32px) scalex(-1) translatex(100%);
}

.left-side:nth-child(32) {
    transform: translatez(32px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(33) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-33px);
}

.left-side:nth-child(33) {
    transform: translatez(33px) rotatey(-180deg);
}

.page:nth-child(34) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-34px) scalex(-1) translatex(100%);
}

.left-side:nth-child(34) {
    transform: translatez(34px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(35) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-35px);
}

.left-side:nth-child(35) {
    transform: translatez(35px) rotatey(-180deg);
}

.page:nth-child(36) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-36px) scalex(-1) translatex(100%);
}

.left-side:nth-child(36) {
    transform: translatez(36px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(37) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-37px);
}

.left-side:nth-child(37) {
    transform: translatez(37px) rotatey(-180deg);
}

.page:nth-child(38) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-38px) scalex(-1) translatex(100%);
}

.left-side:nth-child(38) {
    transform: translatez(38px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(39) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-39px);
}

.left-side:nth-child(39) {
    transform: translatez(39px) rotatey(-180deg);
}

.page:nth-child(40) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-40px) scalex(-1) translatex(100%);
}

.left-side:nth-child(40) {
    transform: translatez(40px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(41) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-41px);
}

.left-side:nth-child(41) {
    transform: translatez(41px) rotatey(-180deg);
}

.page:nth-child(42) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-42px) scalex(-1) translatex(100%);
}

.left-side:nth-child(42) {
    transform: translatez(42px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(43) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-43px);
}

.left-side:nth-child(43) {
    transform: translatez(43px) rotatey(-180deg);
}

.page:nth-child(44) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-44px) scalex(-1) translatex(100%);
}

.left-side:nth-child(44) {
    transform: translatez(44px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(45) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-45px);
}

.left-side:nth-child(45) {
    transform: translatez(45px) rotatey(-180deg);
}

.page:nth-child(46) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-46px) scalex(-1) translatex(100%);
}

.left-side:nth-child(46) {
    transform: translatez(46px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(47) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-47px);
}

.left-side:nth-child(47) {
    transform: translatez(47px) rotatey(-180deg);
}

.page:nth-child(48) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-48px) scalex(-1) translatex(100%);
}

.left-side:nth-child(48) {
    transform: translatez(48px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(49) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-49px);
}

.left-side:nth-child(49) {
    transform: translatez(49px) rotatey(-180deg);
}

.page:nth-child(50) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-50px) scalex(-1) translatex(100%);
}

.left-side:nth-child(50) {
    transform: translatez(50px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(51) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-51px);
}

.left-side:nth-child(51) {
    transform: translatez(51px) rotatey(-180deg);
}

.page:nth-child(52) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-52px) scalex(-1) translatex(100%);
}

.left-side:nth-child(52) {
    transform: translatez(52px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(53) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-53px);
}

.left-side:nth-child(53) {
    transform: translatez(53px) rotatey(-180deg);
}

.page:nth-child(54) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-54px) scalex(-1) translatex(100%);
}

.left-side:nth-child(54) {
    transform: translatez(54px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(55) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-55px);
}

.left-side:nth-child(55) {
    transform: translatez(55px) rotatey(-180deg);
}

.page:nth-child(56) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-56px) scalex(-1) translatex(100%);
}

.left-side:nth-child(56) {
    transform: translatez(56px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(57) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-57px);
}

.left-side:nth-child(57) {
    transform: translatez(57px) rotatey(-180deg);
}

.page:nth-child(58) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-58px) scalex(-1) translatex(100%);
}

.left-side:nth-child(58) {
    transform: translatez(58px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(59) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-59px);
}

.left-side:nth-child(59) {
    transform: translatez(59px) rotatey(-180deg);
}

.page:nth-child(60) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-60px) scalex(-1) translatex(100%);
}

.left-side:nth-child(60) {
    transform: translatez(60px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(61) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-61px);
}

.left-side:nth-child(61) {
    transform: translatez(61px) rotatey(-180deg);
}

.page:nth-child(62) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-62px) scalex(-1) translatex(100%);
}

.left-side:nth-child(62) {
    transform: translatez(62px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(63) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-63px);
}

.left-side:nth-child(63) {
    transform: translatez(63px) rotatey(-180deg);
}

.page:nth-child(64) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-64px) scalex(-1) translatex(100%);
}

.left-side:nth-child(64) {
    transform: translatez(64px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(65) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-65px);
}

.left-side:nth-child(65) {
    transform: translatez(65px) rotatey(-180deg);
}

.page:nth-child(66) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-66px) scalex(-1) translatex(100%);
}

.left-side:nth-child(66) {
    transform: translatez(66px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(67) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-67px);
}

.left-side:nth-child(67) {
    transform: translatez(67px) rotatey(-180deg);
}

.page:nth-child(68) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-68px) scalex(-1) translatex(100%);
}

.left-side:nth-child(68) {
    transform: translatez(68px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(69) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-69px);
}

.left-side:nth-child(69) {
    transform: translatez(69px) rotatey(-180deg);
}

.page:nth-child(70) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-70px) scalex(-1) translatex(100%);
}

.left-side:nth-child(70) {
    transform: translatez(70px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(71) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-71px);
}

.left-side:nth-child(71) {
    transform: translatez(71px) rotatey(-180deg);
}

.page:nth-child(72) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-72px) scalex(-1) translatex(100%);
}

.left-side:nth-child(72) {
    transform: translatez(72px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(73) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-73px);
}

.left-side:nth-child(73) {
    transform: translatez(73px) rotatey(-180deg);
}

.page:nth-child(74) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-74px) scalex(-1) translatex(100%);
}

.left-side:nth-child(74) {
    transform: translatez(74px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(75) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-75px);
}

.left-side:nth-child(75) {
    transform: translatez(75px) rotatey(-180deg);
}

.page:nth-child(76) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-76px) scalex(-1) translatex(100%);
}

.left-side:nth-child(76) {
    transform: translatez(76px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(77) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-77px);
}

.left-side:nth-child(77) {
    transform: translatez(77px) rotatey(-180deg);
}

.page:nth-child(78) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-78px) scalex(-1) translatex(100%);
}

.left-side:nth-child(78) {
    transform: translatez(78px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(79) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-79px);
}

.left-side:nth-child(79) {
    transform: translatez(79px) rotatey(-180deg);
}

.page:nth-child(80) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-80px) scalex(-1) translatex(100%);
}

.left-side:nth-child(80) {
    transform: translatez(80px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(81) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-81px);
}

.left-side:nth-child(81) {
    transform: translatez(81px) rotatey(-180deg);
}

.page:nth-child(82) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-82px) scalex(-1) translatex(100%);
}

.left-side:nth-child(82) {
    transform: translatez(82px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(83) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-83px);
}

.left-side:nth-child(83) {
    transform: translatez(83px) rotatey(-180deg);
}

.page:nth-child(84) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-84px) scalex(-1) translatex(100%);
}

.left-side:nth-child(84) {
    transform: translatez(84px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(85) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-85px);
}

.left-side:nth-child(85) {
    transform: translatez(85px) rotatey(-180deg);
}

.page:nth-child(86) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-86px) scalex(-1) translatex(100%);
}

.left-side:nth-child(86) {
    transform: translatez(86px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(87) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-87px);
}

.left-side:nth-child(87) {
    transform: translatez(87px) rotatey(-180deg);
}

.page:nth-child(88) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-88px) scalex(-1) translatex(100%);
}

.left-side:nth-child(88) {
    transform: translatez(88px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(89) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-89px);
}

.left-side:nth-child(89) {
    transform: translatez(89px) rotatey(-180deg);
}

.page:nth-child(90) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-90px) scalex(-1) translatex(100%);
}

.left-side:nth-child(90) {
    transform: translatez(90px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(91) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-91px);
}

.left-side:nth-child(91) {
    transform: translatez(91px) rotatey(-180deg);
}

.page:nth-child(92) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-92px) scalex(-1) translatex(100%);
}

.left-side:nth-child(92) {
    transform: translatez(92px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(93) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-93px);
}

.left-side:nth-child(93) {
    transform: translatez(93px) rotatey(-180deg);
}

.page:nth-child(94) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-94px) scalex(-1) translatex(100%);
}

.left-side:nth-child(94) {
    transform: translatez(94px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(95) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-95px);
}

.left-side:nth-child(95) {
    transform: translatez(95px) rotatey(-180deg);
}

.page:nth-child(96) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-96px) scalex(-1) translatex(100%);
}

.left-side:nth-child(96) {
    transform: translatez(96px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(97) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-97px);
}

.left-side:nth-child(97) {
    transform: translatez(97px) rotatey(-180deg);
}

.page:nth-child(98) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-98px) scalex(-1) translatex(100%);
}

.left-side:nth-child(98) {
    transform: translatez(98px) scalex(-1) translatex(100%) rotatey(180deg);
}

.page:nth-child(99) {
    padding: 5% 4% 4% 5%;
    transform-origin: 0% 50%;
    transform: translatez(-99px);
}

.left-side:nth-child(99) {
    transform: translatez(99px) rotatey(-180deg);
}

.page:nth-child(100) {
    padding: 5% 5% 4% 4%;
    transform-origin: 100% 50%;
    transform: translatez(-100px) scalex(-1) translatex(100%);
}

.left-side:nth-child(100) {
    transform: translatez(100px) scalex(-1) translatex(100%) rotatey(180deg);
}

.cover-front img {
    width: 100%;
    height: 100%;
}

.cover-front:nth-child(1) {
    padding: 0;
}

.cover-front:last-child {
    padding: 0;
}

.instruction {
    left: calc(50% - 150px);
    font-size: 26px;
    font-family: "EB Garamond", serif;
    text-align: center;
    color: #0009;
    background: #fff7;
    border-radius: 15px;
    padding: 10px 15px;
}