* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: #ffffff;
}

body {
    margin: 40px auto;
    max-width: 650px;
    line-height: 1.6;
    font-size: 18px;
    color: #444;
    padding: 0 10px;
    font-family: serif;
    background: #ffffff;
}

h1,
h2,
h3 {
    line-height: 1.2;
}

a {
    color: inherit;
}

.easter-egg {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 20;

    width: 34px;
    height: 34px;

    padding: 0;
    border: 0;

    background: transparent url("/public/image/yorha-logo.png") center / contain no-repeat;

    opacity: 0.16;
    cursor: pointer;

    filter: grayscale(1) contrast(1.5);
    mix-blend-mode: multiply;

    transition:
        opacity 160ms ease,
        transform 160ms ease,
        filter 160ms ease;
}

.easter-egg:hover,
.easter-egg:focus-visible {
    opacity: 0.8;
    transform: scale(1.16);
    filter: grayscale(1) contrast(2);
    outline: none;
}

.easter-egg::before {
    content: "YoRHa";
    position: absolute;
    right: 42px;
    top: 50%;
    transform: translateY(-50%);
    font-family: "Rodin Pro", sans-serif;
    font-size: 9px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(68, 68, 68, 0);
    white-space: nowrap;
    transition: color 160ms ease;
}

.easter-egg:hover::before,
.easter-egg:focus-visible::before {
    color: rgba(68, 68, 68, 0.5);
}

body.is-transitioning-to-nier main,
body.is-transitioning-to-nier .easter-egg {
    opacity: 0;
    transition: opacity 180ms steps(3, end);
}

.nier-loader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    overflow: hidden;

    background:
        radial-gradient(circle at 92% 8%, rgba(223, 219, 210, 0.08), transparent 1.1%, transparent 100%),
        radial-gradient(circle at center, rgba(36, 33, 27, 0.34), transparent 52%),
        var(--yorha-black);

    color: var(--yorha-text);

    font-family: "Rodin Pro", sans-serif;
    letter-spacing: 0.075em;
    isolation: isolate;
    transform-origin: center;
}

.nier-loader.is-active {
    display: block;
    animation: yorhaPowerOn 420ms steps(5, end) both;
}

.nier-loader.is-transition-preview {
    display: block;
    opacity: 1;
    transform: scaleY(1);
    animation: yorhaPreviewSettle 420ms steps(8, end) both;
}

.nier-loader.is-transition-preview .nier-boot-content {
    animation:
        contentWarp 2.8s steps(2, end) infinite,
        previewContentFade 420ms steps(8, end) forwards;
}

.nier-loader-bg-logo {
    position: absolute;
    left: 50%;
    top: 52%;
    width: 100%;
    height: 100%;
    transform: translate(-50%, -50%);
    background-image: url("/public/image/yorha.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    opacity: 0.19;
    filter: grayscale(1) contrast(1.2) brightness(1.03);
    mix-blend-mode: screen;
    pointer-events: none;
}

.nier-loader::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;

    background:
        repeating-linear-gradient(0deg,
            rgba(255, 255, 255, 0.035) 0px,
            rgba(255, 255, 255, 0.035) 1px,
            transparent 1px,
            transparent 4px),
        repeating-linear-gradient(90deg,
            rgba(255, 255, 255, 0.025) 0px,
            rgba(255, 255, 255, 0.025) 1px,
            transparent 1px,
            transparent 5px);

    mix-blend-mode: overlay;
    opacity: 0.65;
}

.nier-loader::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 5;
    pointer-events: none;
    background:
        radial-gradient(ellipse at center, transparent 48%, rgba(0, 0, 0, 0.34) 100%),
        linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.06) 50%, transparent 100%);
    box-shadow: inset 0 0 92px rgba(0, 0, 0, 0.88);
    animation: crtRoll 5.5s linear infinite;
}

.nier-noise {
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;
    opacity: 0.16;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='170' height='170'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='170' height='170' filter='url(%23n)' opacity='0.76'/%3E%3C/svg%3E");
    animation: noiseDrift 460ms steps(2, end) infinite;
    mix-blend-mode: screen;
}

.nier-glitch-slice {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    z-index: 6;
    pointer-events: none;
    background: rgba(255, 255, 255, 0.28);
    opacity: 0;
    animation: glitchSlice 3.1s steps(1, end) infinite;
}

.nier-boot-content {
    position: relative;
    z-index: 2;
    width: 100vw;
    height: 100vh;
    padding: clamp(32px, 5vw, 72px) clamp(32px, 6vw, 96px);
    box-sizing: border-box;
    text-shadow:
        -2px 0 var(--crt-red),
        2px 0 var(--crt-cyan),
        0 0 9px rgba(217, 214, 204, 0.25);
    transform: translateZ(0);
    animation: contentWarp 2.8s steps(2, end) infinite;
}

.nier-heading-row {
    display: flex;
    align-items: flex-end;
    gap: 14px;
    white-space: nowrap;
}

.nier-loading-title {
    font-size: clamp(16px, 4.3vw, 36px);
    line-height: 0.9;
    font-weight: 400;
    letter-spacing: 0.11em;
}

.nier-loading-subtitle {
    bottom: 8px;
    font-size: clamp(16px, 1.55vw, 27px);
    line-height: 1;
    font-weight: 700;
    letter-spacing: 0.115em;
}

.nier-terminal {
    margin-top: clamp(34px, 5.4vh, 56px);
    margin-left: clamp(8px, 1.25vw, 22px);
    width: min(560px, 72vw);
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 1.15vh, 14px);
    font-size: clamp(14px, 1.27vw, 22px);
    line-height: 1.05;
    font-weight: 700;
}

.nier-line {
    min-height: 1.1em;
    opacity: 0;
    transform: translateX(-2px);
}

.nier-line.is-visible {
    opacity: 1;
    transform: translateX(0);
}

.nier-line .cursor {
    display: inline-block;
    width: 0.62em;
    margin-left: 2px;
    color: var(--yorha-text);
    animation: cursorBlink 520ms steps(1, end) infinite;
}

.nier-mini-reticle {
    position: absolute;
    top: clamp(32px, 6vh, 72px);
    right: clamp(48px, 8vw, 128px);
    z-index: 2;
    width: clamp(26px, 2.7vw, 42px);
    aspect-ratio: 1;
    border: 2px solid rgba(217, 214, 204, 0.58);
    border-radius: 50%;
    box-shadow:
        -2px 0 var(--crt-red),
        2px 0 var(--crt-cyan),
        inset 0 0 0 4px rgba(217, 214, 204, 0.08),
        inset 0 0 0 8px rgba(217, 214, 204, 0.25);
    animation: reticleSpin 1.1s linear infinite, reticleFlicker 2s steps(4, end) infinite;
}

.nier-mini-reticle::before,
.nier-mini-reticle::after {
    content: "";
    position: absolute;
    inset: 5px;
    border: 1px solid rgba(217, 214, 204, 0.7);
    border-radius: 50%;
}

.nier-mini-reticle::after {
    inset: 11px;
    border-top-color: transparent;
    border-bottom-color: transparent;
}

.nier-transition-cover {
    position: fixed;
    inset: 0;
    z-index: 10000;
    pointer-events: none;
    background:
        repeating-linear-gradient(0deg,
            rgba(255, 255, 255, 0.04) 0px,
            rgba(255, 255, 255, 0.04) 1px,
            transparent 1px,
            transparent 4px),
        radial-gradient(circle at center, rgba(223, 219, 210, 0.08), transparent 42%),
        var(--yorha-black);
    opacity: 0;
    transform: scaleY(0);
    transform-origin: center;
    filter: brightness(2.2) contrast(1.8);
}

.nier-transition-cover.is-active {
    animation: nierCoverIn 620ms steps(10, end) forwards;
}

.nier-transition-cover.is-returning {
    opacity: 1;
    transform: scaleY(1);
    animation: nierCoverOut 620ms steps(10, end) forwards;
}

@supports (view-transition-name: root) {
    .nier-transition-cover.is-active,
    .nier-transition-cover.is-returning {
        animation: none !important;
        opacity: 0 !important;
        transform: scaleY(0) !important;
    }
}

@keyframes nierCoverIn {
    0% {
        opacity: 0;
        transform: scaleY(0.015);
        filter: brightness(3) contrast(2.4);
    }

    28% {
        opacity: 1;
        transform: scaleY(0.04);
        filter: brightness(4) contrast(2.8);
    }

    52% {
        opacity: 1;
        transform: scaleY(1);
        filter: brightness(1.5) contrast(1.6);
    }

    100% {
        opacity: 1;
        transform: scaleY(1);
        filter: brightness(1) contrast(1.2);
    }
}

@keyframes nierCoverOut {
    0% {
        opacity: 1;
        transform: scaleY(1);
        filter: brightness(1.2) contrast(1.4);
    }

    42% {
        opacity: 1;
        transform: scaleY(1);
        filter: brightness(2.4) contrast(2);
    }

    100% {
        opacity: 0;
        transform: scaleY(0.015);
        filter: brightness(0);
    }
}

@keyframes yorhaPowerOn {
    0% {
        opacity: 0;
        filter: brightness(0) contrast(1.8);
        transform: scaleY(0.015);
    }

    22% {
        opacity: 1;
        filter: brightness(3) contrast(2);
        transform: scaleY(0.035);
    }

    38% {
        transform: scaleY(1);
        filter: brightness(1.35) contrast(1.25);
    }

    100% {
        opacity: 1;
        filter: brightness(1) contrast(1.08);
        transform: scaleY(1);
    }
}

@keyframes yorhaPreviewSettle {
    0% {
        opacity: 1;
        filter: brightness(1) contrast(1.08);
        transform: scaleY(1);
    }

    34% {
        opacity: 1;
        filter: brightness(2.2) contrast(1.9);
        transform: scaleY(1);
    }

    58% {
        opacity: 1;
        filter: brightness(1.35) contrast(1.4);
        transform: scaleY(1);
    }

    100% {
        opacity: 1;
        filter: brightness(1) contrast(1.15);
        transform: scaleY(1);
    }
}

@keyframes previewContentFade {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.45;
    }

    100% {
        opacity: 0;
    }
}

@keyframes cursorBlink {
    0%,
    48% {
        opacity: 1;
    }

    49%,
    100% {
        opacity: 0;
    }
}

@keyframes reticleSpin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes reticleFlicker {
    0%,
    100% {
        opacity: 0.78;
    }

    45% {
        opacity: 0.42;
    }

    48% {
        opacity: 1;
    }
}

@keyframes crtRoll {
    from {
        background-position: 0 -100vh, 0 -100vh;
    }

    to {
        background-position: 0 100vh, 0 100vh;
    }
}

@keyframes noiseDrift {
    0% {
        transform: translate3d(0, 0, 0);
    }

    25% {
        transform: translate3d(-2%, 1%, 0);
    }

    50% {
        transform: translate3d(1%, -2%, 0);
    }

    75% {
        transform: translate3d(2%, 2%, 0);
    }

    100% {
        transform: translate3d(-1%, 0, 0);
    }
}

@keyframes contentWarp {
    0%,
    100% {
        transform: skewX(0deg) translateX(0);
    }

    48% {
        transform: skewX(0deg) translateX(0);
    }

    49% {
        transform: skewX(-0.35deg) translateX(-1px);
    }

    50% {
        transform: skewX(0.28deg) translateX(2px);
    }

    51% {
        transform: skewX(0deg) translateX(0);
    }
}

@keyframes glitchSlice {
    0%,
    86%,
    100% {
        opacity: 0;
        top: 18%;
        transform: translateX(0);
    }

    87% {
        opacity: 0.65;
        top: 22%;
        transform: translateX(-12px);
    }

    88% {
        opacity: 0;
        top: 22%;
        transform: translateX(0);
    }

    91% {
        opacity: 0.45;
        top: 61%;
        transform: translateX(18px);
    }

    92% {
        opacity: 0;
        top: 61%;
        transform: translateX(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .nier-loader,
    .nier-loader::before,
    .nier-loader::after,
    .nier-noise,
    .nier-glitch-slice,
    .nier-boot-content,
    .nier-mini-reticle,
    .easter-egg,
    .nier-line .cursor,
    .nier-transition-cover {
        animation: none !important;
        transition: none !important;
    }
}

@media (max-width: 680px) {
    .nier-boot-content {
        padding: 32px 22px;
    }

    .nier-heading-row {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .nier-loading-subtitle {
        bottom: 0;
    }

    .nier-terminal {
        width: calc(100vw - 44px);
        margin-left: 0;
        font-size: 13px;
        gap: 9px;
    }
}