.ktb-passage-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    border: 2px solid #d6b45d;
    padding: 12px 20px;
    background: #101010;
    color: #fffaf0 !important;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 17px;
    font-weight: 800;
    line-height: 1.2;
    text-decoration: none;
    text-shadow: 0 2px 7px rgba(0, 0, 0, 0.65);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
}

.ktb-passage-link--liber {
    border-color: #f1ca62;
    background: linear-gradient(135deg, #0b0a08 0%, #7e5b13 56%, #d6b45d 100%);
    color: #fff !important;
}

.ktb-passage-link--radio {
    border-color: #ff7a1a;
    background: linear-gradient(135deg, #080808 0%, #161616 48%, #d85e1c 100%);
    color: #fff !important;
}

.ktb-passage-link:hover,
.ktb-passage-link:focus {
    background: #d6b45d;
    color: #111 !important;
    text-shadow: none;
    text-decoration: none;
}

.ktb-passage-running,
.ktb-passage-running body {
    overflow: hidden;
}

.ktb-passage {
    position: fixed;
    inset: 0;
    z-index: 2147483000;
    display: grid;
    place-items: center;
    overflow: hidden;
    pointer-events: none;
    color: #fffaf0;
    font-family: Georgia, "Times New Roman", serif;
}

.ktb-passage__caption {
    position: absolute;
    left: 50%;
    bottom: clamp(34px, 8vh, 90px);
    margin: 0;
    transform: translateX(-50%);
    color: #fff7df;
    font-size: clamp(18px, 2.4vw, 28px);
    font-weight: 800;
    letter-spacing: 0;
    text-align: center;
    text-shadow: 0 4px 18px rgba(0, 0, 0, 0.55);
}

.ktb-passage__shade {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 50% 46%, rgba(214, 180, 93, 0.32), transparent 32%),
        linear-gradient(135deg, #020202 0%, #0e0b08 42%, #1b1409 100%);
}

.ktb-passage-book {
    position: relative;
    width: min(90vw, 1120px);
    height: min(78vh, 720px);
    perspective: 1200px;
    transform: scale(0.92);
    animation: ktb-passage-book-open 4.3s cubic-bezier(0.16, 0.72, 0.15, 1) forwards;
}

.ktb-passage-book__back,
.ktb-passage-book__cover,
.ktb-passage-book__pages span {
    position: absolute;
    top: 7%;
    bottom: 7%;
    width: 49%;
    border: 1px solid rgba(214, 180, 93, 0.48);
    box-shadow: 0 22px 64px rgba(0, 0, 0, 0.42);
}

.ktb-passage-book__back {
    left: 25.5%;
    width: 49%;
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.11), transparent 8%, transparent 92%, rgba(0, 0, 0, 0.13)),
        #fffaf0;
    transform: rotateY(0deg);
}

.ktb-passage-book__cover {
    background:
        radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.22), transparent 18%),
        linear-gradient(135deg, #2a1b06, #d6b45d 54%, #6b4d13);
}

.ktb-passage-book__cover--left {
    left: 1.8%;
    transform-origin: right center;
    animation: ktb-passage-left-cover 4.1s cubic-bezier(0.18, 0.76, 0.13, 1) forwards;
}

.ktb-passage-book__cover--right {
    right: 1.8%;
    transform-origin: left center;
    animation: ktb-passage-right-cover 4.1s cubic-bezier(0.18, 0.76, 0.13, 1) forwards;
}

.ktb-passage-book__pages {
    position: absolute;
    inset: 0;
}

.ktb-passage-book__pages span {
    left: 50%;
    transform-origin: left center;
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.14), transparent 10%),
        repeating-linear-gradient(180deg, transparent 0 27px, rgba(36, 29, 18, 0.12) 28px 29px),
        #fffaf0;
    transform: rotateY(0deg);
    animation: ktb-passage-page-turn 2.85s cubic-bezier(0.13, 0.92, 0.22, 1) forwards;
    animation-delay: calc(var(--ktb-page) * 125ms);
}

.ktb-passage-book__title {
    position: absolute;
    inset: 37% 18%;
    display: grid;
    place-items: center;
    color: #2a1b06;
    font-size: clamp(34px, 6vw, 78px);
    font-weight: 900;
    text-align: center;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
    opacity: 0;
    transform: translateY(18px);
    animation: ktb-passage-title-in 0.72s ease-out 3.45s forwards;
}

.ktb-passage--arrive-liber .ktb-passage-book {
    animation-duration: 0.76s;
}

.ktb-passage--arrive-liber .ktb-passage-book__pages span {
    animation-duration: 0.56s;
    animation-delay: calc(var(--ktb-page) * 20ms);
}

.ktb-passage--leave,
.ktb-passage--arrival.ktb-passage--leave {
    animation: ktb-passage-fade-away 0.28s ease forwards;
}

.ktb-passage--to-radio,
.ktb-passage--arrive-radio {
    background:
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.18), transparent 18%),
        radial-gradient(circle at 50% 50%, rgba(255, 0, 93, 0.2), transparent 24%),
        radial-gradient(circle at 44% 46%, rgba(0, 120, 255, 0.2), transparent 22%),
        #020205;
}

.ktb-passage--to-radio::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 4;
    background:
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0.92) 42%, rgba(255, 255, 255, 0.62) 100%);
    opacity: 0;
    animation: ktb-passage-radio-white-arrival 4.3s ease-out forwards;
}

.ktb-passage--to-radio .ktb-passage__caption,
.ktb-passage--to-radio .ktb-passage-radio__spectrum {
    z-index: 5;
}

.ktb-passage-radio__static {
    position: absolute;
    inset: -20%;
    background:
        repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px 4px),
        repeating-linear-gradient(90deg, rgba(214, 180, 93, 0.08) 0 1px, transparent 1px 7px);
    mix-blend-mode: screen;
    opacity: 0.5;
    animation: ktb-passage-static 0.12s steps(2, end) infinite;
}

.ktb-passage-radio__tunnel {
    position: relative;
    width: min(68vw, 720px);
    aspect-ratio: 1;
    border-radius: 50%;
    background:
        radial-gradient(circle, transparent 0 16%, rgba(255, 255, 255, 0.08) 17% 18%, transparent 19%),
        conic-gradient(from 90deg, #f7dd55, #ff2b74, #244cff, #18d4ff, #f7dd55);
    filter: saturate(1.28);
    opacity: 0.96;
    transform: scale(0.12);
    animation: ktb-passage-radio-tunnel 4.3s cubic-bezier(0.12, 0.82, 0.16, 1) forwards;
}

.ktb-passage-radio__tunnel::before,
.ktb-passage-radio__tunnel::after,
.ktb-passage-radio__tunnel span {
    content: "";
    position: absolute;
    inset: 10%;
    border: 2px solid rgba(255, 255, 255, 0.42);
    border-radius: 50%;
    box-shadow: 0 0 34px rgba(255, 255, 255, 0.18);
}

.ktb-passage-radio__tunnel::after {
    inset: 24%;
    border-color: rgba(214, 180, 93, 0.64);
}

.ktb-passage-radio__tunnel span:nth-child(1) {
    inset: 3%;
}

.ktb-passage-radio__tunnel span:nth-child(2) {
    inset: 18%;
}

.ktb-passage-radio__tunnel span:nth-child(3) {
    inset: 34%;
}

.ktb-passage-radio__tunnel span:nth-child(4) {
    inset: 45%;
    background: rgba(0, 0, 0, 0.52);
}

.ktb-passage-radio__spectrum {
    position: absolute;
    left: 50%;
    bottom: clamp(110px, 15vh, 170px);
    display: flex;
    align-items: center;
    gap: 8px;
    transform: translateX(-50%);
}

.ktb-passage-radio__spectrum i {
    display: block;
    width: clamp(8px, 1vw, 14px);
    height: 42px;
    border-radius: 999px;
    background: linear-gradient(180deg, #f7dd55, #ff2b74 45%, #244cff);
    animation: ktb-passage-spectrum 0.54s ease-in-out infinite alternate;
}

.ktb-passage-radio__spectrum i:nth-child(2n) {
    animation-delay: 0.1s;
}

.ktb-passage-radio__spectrum i:nth-child(3n) {
    animation-delay: 0.18s;
}

.ktb-passage--arrive-radio .ktb-passage-radio__tunnel {
    animation-duration: 0.68s;
}

@keyframes ktb-passage-book-open {
    0% {
        transform: scale(0.68) translateY(28px);
        filter: blur(8px);
    }
    62% {
        transform: scale(1.02) translateY(0);
        filter: blur(0);
    }
    100% {
        transform: scale(1) translateY(0);
        filter: blur(0);
    }
}

@keyframes ktb-passage-left-cover {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(74deg);
    }
}

@keyframes ktb-passage-right-cover {
    0% {
        transform: rotateY(0deg);
    }
    100% {
        transform: rotateY(-74deg);
    }
}

@keyframes ktb-passage-page-turn {
    0% {
        transform: rotateY(0deg);
        opacity: 1;
    }
    62% {
        opacity: 1;
    }
    100% {
        transform: rotateY(-168deg);
        opacity: 0.08;
    }
}

@keyframes ktb-passage-title-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes ktb-passage-fade-away {
    to {
        opacity: 0;
    }
}

@keyframes ktb-passage-static {
    0% {
        transform: translate3d(-1%, 1%, 0);
        opacity: 0.34;
    }
    100% {
        transform: translate3d(1%, -1%, 0);
        opacity: 0.58;
    }
}

@keyframes ktb-passage-radio-tunnel {
    0% {
        transform: scale(0.08) rotate(0deg);
        filter: blur(10px) saturate(1);
    }
    62% {
        transform: scale(1.08) rotate(186deg);
        filter: blur(0) saturate(1.45);
    }
    100% {
        transform: scale(8.5) rotate(320deg);
        filter: blur(2px) saturate(1.2);
    }
}

@keyframes ktb-passage-radio-white-arrival {
    0%,
    72% {
        opacity: 0;
    }
    88% {
        opacity: 0.18;
    }
    100% {
        opacity: 0.92;
    }
}

@keyframes ktb-passage-spectrum {
    0% {
        transform: scaleY(0.42);
    }
    100% {
        transform: scaleY(1.72);
    }
}

@media (prefers-reduced-motion: reduce) {
    .ktb-passage,
    .ktb-passage * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (max-width: 700px) {
    .ktb-passage-book {
        width: 92vw;
        height: 58vh;
    }

    .ktb-passage-radio__tunnel {
        width: 96vw;
    }
}