:root {
    --studio-bg: #faf9f6;
    --studio-ink: #2d2926;
    --studio-muted: #625d59;
    --studio-line: rgba(45, 41, 38, 0.16);
    --angel-brass: #ad7c43;
    --angel-sage: #758b78;
    --angel-sakura: #c88680;
    --paper: #fffaf0;
    --dot-scroll-y: 0px;
    --scan-scroll-y: 0px;
    --font-display: "Dela Gothic One", sans-serif;
    --font-reading: "Noto Serif JP", serif;
    --font-mono: "Space Mono", monospace;
    --z-content: 10;
    --z-frame: 80;
    --z-scanlines: 90;
    --z-skip: 100;
    color-scheme: light;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    min-height: 100%;
    scrollbar-gutter: stable;
}

body {
    min-width: 320px;
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
    position: relative;
    isolation: isolate;
    background: var(--studio-bg);
    color: var(--studio-ink);
    font-family: var(--font-reading);
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body::after {
    content: "";
    position: fixed;
    inset: -4px 0;
    z-index: var(--z-scanlines);
    pointer-events: none;
    background:
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.02) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.01), rgba(0, 255, 0, 0.005), rgba(0, 0, 255, 0.01));
    background-size: 100% 4px, 3px 100%;
    transform: translate3d(0, var(--scan-scroll-y), 0);
    will-change: transform;
}

.grid-bg {
    position: fixed;
    inset: -40px 0;
    z-index: 1;
    opacity: 0.1;
    pointer-events: none;
    background-image: radial-gradient(#000 1px, transparent 1px);
    background-size: 40px 40px;
    transform: translate3d(0, var(--dot-scroll-y), 0);
    will-change: transform;
}

.terminal-frame {
    position: fixed;
    inset: 20px;
    z-index: var(--z-frame);
    border: 1px solid rgba(45, 41, 38, 0.05);
    border-radius: 12px;
    pointer-events: none;
}

.frame-label {
    position: absolute;
    color: rgba(45, 41, 38, 0.58);
    font: 400 10px/1.4 var(--font-mono);
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.frame-label span {
    display: block;
    margin-top: 2px;
    font-size: 8px;
    letter-spacing: 0.1em;
    opacity: 0.72;
}

.frame-label--top {
    top: 15px;
    left: 20px;
}

.frame-label--bottom {
    right: 20px;
    bottom: 10px;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    font: inherit;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:focus-visible {
    outline: 3px solid var(--studio-ink);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    top: 10px;
    left: 50%;
    z-index: var(--z-skip);
    padding: 10px 16px;
    border: 1px solid var(--studio-ink);
    border-radius: 999px;
    background: var(--studio-bg);
    font: 700 12px/1 var(--font-mono);
    text-decoration: none;
    transform: translate(-50%, -160%);
    transition: transform 180ms ease-out;
}

.skip-link:focus {
    transform: translate(-50%, 0);
}

.studio-arrival {
    display: none;
}

html.from-studio body {
    overflow: hidden;
}

html.from-studio .studio-arrival {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: block;
    overflow: hidden;
    background: #efe3ce;
    pointer-events: none;
    animation: studio-arrival-release 820ms cubic-bezier(0.16, 1, 0.3, 1) 120ms both;
}

.studio-arrival img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.studio-arrival__atmosphere {
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 100px rgba(95, 68, 42, 0.1);
}

html.from-studio .spark-app {
    animation: studio-page-reveal 760ms ease-out 220ms both;
}

@keyframes studio-arrival-release {
    0%, 28% {
        opacity: 1;
        visibility: visible;
        transform: scale(1.035);
    }
    100% {
        opacity: 0;
        visibility: hidden;
        transform: scale(1);
    }
}

@keyframes studio-page-reveal {
    from {
        opacity: 0.42;
        transform: scale(0.992);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.spark-app {
    position: relative;
    z-index: var(--z-content);
    display: flex;
    min-height: 100dvh;
    flex-direction: column;
    padding: clamp(58px, 6vw, 92px) clamp(38px, 5vw, 88px) clamp(52px, 6vw, 86px);
}

.spark-masthead,
.spark-main,
.spark-footer {
    width: min(100%, 1560px);
    margin-inline: auto;
}

.spark-masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.brand-anchor {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    color: var(--studio-ink);
    text-decoration: none;
}

.brand-anchor__image {
    width: 76px;
    height: 76px;
    flex: 0 0 auto;
    overflow: hidden;
    border: 1px solid rgba(45, 41, 38, 0.12);
    border-radius: 16px;
    background: #fff;
    box-shadow: 0 13px 30px rgba(45, 41, 38, 0.08);
}

.brand-anchor__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 50% 47%;
}

.brand-anchor__copy {
    display: grid;
    gap: 5px;
}

.brand-anchor__copy strong {
    font: 400 18px/1.2 var(--font-display);
    letter-spacing: -0.02em;
}

.brand-anchor__copy span {
    color: var(--studio-muted);
    font: 400 10px/1.5 var(--font-mono);
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.masthead-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 22px;
}

.language-select {
    max-width: 180px;
    padding: 10px 34px 10px 13px;
    border: 1px solid var(--studio-line);
    border-radius: 999px;
    background: rgba(255, 250, 240, 0.76);
    color: var(--studio-ink);
    font: 700 10px/1.2 var(--font-mono);
    cursor: pointer;
}

.language-select:hover {
    border-color: var(--angel-sage);
}

.studio-link {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 10px 0;
    border-bottom: 1px solid currentColor;
    font: 700 11px/1 var(--font-mono);
    letter-spacing: 0.08em;
    text-decoration: none;
    text-transform: uppercase;
    transition: color 180ms ease-out, gap 180ms ease-out;
}

.studio-link:hover {
    color: var(--angel-sage);
    gap: 13px;
}

.spark-main {
    flex: 1;
    padding-top: clamp(52px, 6vw, 92px);
}

.spark-intro {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
    align-items: end;
    gap: clamp(36px, 6vw, 112px);
    margin-bottom: clamp(42px, 5vw, 72px);
}

.eyebrow {
    margin: 0;
    color: var(--angel-sage);
    font: 700 11px/1.5 var(--font-mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.spark-intro h1 {
    max-width: 17ch;
    margin: 14px 0 0;
    font: 400 clamp(2.45rem, 4.6vw, 5rem)/1 var(--font-display);
    letter-spacing: -0.035em;
    text-wrap: balance;
}

.spark-intro__lede {
    max-width: 58ch;
    margin: 0 0 5px;
    color: #514c48;
    font-size: clamp(1rem, 1.22vw, 1.16rem);
    line-height: 1.75;
    text-wrap: pretty;
}

.room-experience {
    width: min(100%, 980px);
    margin-inline: auto;
    min-width: 0;
}

.angel-room-frame {
    position: relative;
    min-width: 0;
    padding: 10px;
    border: 1px solid rgba(117, 139, 120, 0.48);
    border-radius: 18px 18px 10px 10px;
    background: rgba(255, 250, 240, 0.78);
    box-shadow: 0 24px 70px rgba(99, 78, 58, 0.14), inset 0 1px rgba(255, 255, 255, 0.9);
}

.angel-room-frame::before,
.angel-room-frame::after {
    content: "";
    position: absolute;
    z-index: 8;
    width: 34px;
    height: 34px;
    pointer-events: none;
}

.angel-room-frame::before {
    top: -1px;
    left: -1px;
    border-top: 2px solid var(--angel-brass);
    border-left: 2px solid var(--angel-brass);
}

.angel-room-frame::after {
    right: -1px;
    bottom: -1px;
    border-right: 2px solid var(--angel-brass);
    border-bottom: 2px solid var(--angel-brass);
}

.room-stage {
    position: relative;
    aspect-ratio: 1 / 1;
    min-height: 0;
    overflow: hidden;
    border-radius: 10px 10px 4px 4px;
    background: #efe3ce;
    isolation: isolate;
}

.room-background {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 80% center;
    user-select: none;
}

.room-atmosphere {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    box-shadow: inset 0 0 80px rgba(95, 68, 42, 0.08);
}

.quote-canvas {
    position: absolute;
    top: 16%;
    right: 5%;
    left: auto;
    z-index: 4;
    display: flex;
    width: 40%;
    height: 48%;
    flex-direction: column;
    justify-content: center;
    padding: clamp(20px, 2.4vw, 42px) clamp(18px, 2.7vw, 44px);
    color: #37312d;
    border: 0;
    border-radius: 0;
    background: rgba(255, 250, 240, 0.14);
    box-shadow: none;
}

.quote-canvas__meta {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    color: #746c64;
    font: 700 clamp(7px, 0.68vw, 10px)/1.5 var(--font-mono);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.quote-canvas__text {
    max-width: 17ch;
    margin: clamp(18px, 2vw, 30px) 0 14px;
    font: 600 clamp(1.05rem, 2.05vw, 2.2rem)/1.25 var(--font-reading);
    letter-spacing: -0.025em;
    text-wrap: balance;
    transition: opacity 260ms ease, transform 480ms cubic-bezier(0.16, 1, 0.3, 1), filter 260ms ease;
}

.quote-canvas__author {
    margin: 0;
    color: var(--angel-sage);
    font: 700 clamp(8px, 0.72vw, 11px)/1.5 var(--font-mono);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    transition: opacity 220ms ease, transform 420ms cubic-bezier(0.16, 1, 0.3, 1), filter 220ms ease;
}

.quote-canvas.is-changing .quote-canvas__text,
.quote-canvas.is-changing .quote-canvas__author {
    opacity: 0;
    transform: translateY(12px);
    filter: blur(5px);
}

.chirabi-companion {
    position: absolute;
    top: var(--chirabi-y);
    left: var(--chirabi-x);
    z-index: 6;
    width: clamp(160px, 31vw, 310px);
    height: clamp(160px, 31vw, 310px);
    transform: translate(-50%, -100%);
    pointer-events: none;
}

.mascot-sprite-large {
    position: absolute;
    inset: 0;
    overflow: visible;
    contain: layout paint;
    filter: drop-shadow(0 12px 9px rgba(97, 77, 56, 0.22));
    image-rendering: pixelated;
}

.chirabi-motion {
    position: absolute;
    inset: 0;
    transform-origin: center bottom;
}

.chirabi-sprite-film {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    background-image: url("/_assets/chirabi/chirabi-loop-breathe.png");
    background-repeat: no-repeat;
    background-position: 0 0;
    background-size: 400% 400%;
    transform: scaleX(var(--flip, 1));
    transform-origin: center;
    transition: opacity 180ms ease;
}

.chirabi-sprite-film:first-child {
    z-index: 1;
    opacity: 1;
}

.chirabi-sprite-film:last-child {
    z-index: 2;
    opacity: 0;
}

.room-label {
    position: absolute;
    z-index: 3;
    color: rgba(91, 78, 67, 0.58);
    font: 700 clamp(7px, 0.65vw, 9px)/1.5 var(--font-mono);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    pointer-events: none;
}

.room-label--left {
    bottom: 4%;
    left: 2.3%;
}

.room-label--right {
    right: 2.3%;
    bottom: 4%;
}

.room-console {
    display: grid;
    grid-template-columns: minmax(260px, 0.7fr) minmax(480px, 1.3fr);
    align-items: center;
    gap: clamp(30px, 5vw, 82px);
    padding: clamp(22px, 2.6vw, 38px) clamp(18px, 2.7vw, 44px) clamp(18px, 2.2vw, 32px);
}

.chirabi-state {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 13px;
    font-size: 0.96rem;
    line-height: 1.55;
}

.chirabi-state span {
    color: var(--angel-sage);
    font: 700 10px/1.6 var(--font-mono);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.chirabi-state strong {
    font-weight: 600;
}

.room-console__actions {
    display: grid;
    justify-items: end;
}

.quote-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
}

.quote-action {
    min-height: 46px;
    padding: 13px 18px;
    border: 1px solid rgba(45, 41, 38, 0.38);
    border-radius: 999px;
    background: transparent;
    color: var(--studio-ink);
    cursor: pointer;
    font: 700 10px/1 var(--font-mono);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: background 180ms ease-out, color 180ms ease-out, border-color 180ms ease-out, transform 180ms ease-out;
}

.quote-action:hover:not(:disabled) {
    border-color: var(--angel-sage);
    color: var(--angel-sage);
    transform: translateY(-2px);
}

.quote-action:disabled {
    cursor: wait;
    opacity: 0.55;
}

.quote-action--primary {
    border-color: var(--studio-ink);
    background: var(--studio-ink);
    color: var(--studio-bg);
}

.quote-action--primary:hover:not(:disabled) {
    border-color: var(--angel-sage);
    background: var(--angel-sage);
    color: #fff;
}

.quote-action[aria-pressed="true"] {
    border-color: var(--angel-sakura);
    background: rgba(200, 134, 128, 0.13);
    color: #855958;
}

.action-status {
    min-height: 1.5em;
    margin: 12px 0 0;
    color: var(--studio-muted);
    font-size: 0.8rem;
    line-height: 1.5;
    text-align: right;
}

.spark-footer {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
    margin-top: clamp(72px, 9vw, 132px);
    padding-top: 24px;
    border-top: 1px solid var(--studio-line);
    color: var(--studio-muted);
    font: 400 10px/1.6 var(--font-mono);
    letter-spacing: 0.05em;
}

.spark-footer p {
    max-width: 56ch;
    margin: 0;
}

@media (max-width: 1050px) {
    .spark-intro {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .spark-intro h1 {
        max-width: 15ch;
    }

    .room-stage {
        min-height: 0;
    }

    .quote-canvas {
        right: 5%;
        left: auto;
        width: 41%;
    }

    .room-console {
        grid-template-columns: 1fr;
        gap: 22px;
    }

    .room-console__actions,
    .quote-actions {
        justify-items: start;
        justify-content: flex-start;
    }

    .action-status {
        text-align: left;
    }
}

@media (max-width: 760px) {
    .terminal-frame {
        inset: 8px;
        border-radius: 8px;
    }

    .frame-label {
        display: none;
    }

    .spark-app {
        padding: 32px 18px 46px;
    }

    .spark-masthead {
        align-items: flex-start;
        gap: 12px;
    }

    .masthead-actions {
        align-items: flex-end;
        flex-direction: column-reverse;
        gap: 8px;
    }

    .language-select {
        max-width: 140px;
        padding-block: 8px;
        font-size: 9px;
    }

    .brand-anchor__image {
        width: 58px;
        height: 58px;
        border-radius: 14px;
    }

    .brand-anchor__copy strong {
        font-size: 15px;
    }

    .brand-anchor__copy span {
        display: none;
    }

    .studio-link {
        font-size: 9px;
    }

    .spark-main {
        padding-top: 54px;
    }

    .spark-intro h1 {
        font-size: clamp(2.25rem, 10.6vw, 4rem);
    }

    .spark-intro__lede {
        line-height: 1.65;
    }

    .angel-room-frame {
        padding: 7px;
        border-radius: 14px 14px 8px 8px;
    }

    .room-stage {
        width: 100%;
        height: auto;
        min-height: 0;
        aspect-ratio: 1 / 1;
    }

    .room-background {
        object-position: 80% center;
    }

    .quote-canvas {
        top: 14%;
        right: 4%;
        left: auto;
        width: 44%;
        height: 54%;
        min-height: 0;
        justify-content: flex-start;
        padding: 14px 12px 16px;
    }

    .quote-canvas__text {
        max-width: 14ch;
        margin: 12px 0 8px;
        font-size: clamp(0.9rem, 4.3vw, 1.28rem);
    }

    .chirabi-companion {
        top: 91%;
        left: 43%;
        width: clamp(150px, 39vw, 250px);
        height: clamp(150px, 39vw, 250px);
    }

    .room-label {
        display: none;
    }

    .room-console {
        padding: 22px 13px 18px;
    }

    .quote-actions {
        display: grid;
        width: 100%;
        grid-template-columns: 1fr 1fr;
    }

    .quote-action--primary {
        grid-column: 1 / -1;
    }

    .spark-footer {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 430px) {
    .brand-anchor__copy {
        display: none;
    }

    .studio-link {
        white-space: nowrap;
    }

    .language-select {
        max-width: 118px;
    }

    .quote-canvas {
        min-height: 0;
        padding: 9px 8px 10px;
    }

    .quote-canvas__meta {
        align-items: center;
        flex-direction: row;
        justify-content: flex-end;
        gap: 0;
        font-size: 6px;
    }

    .quote-canvas__meta span:first-child {
        display: none;
    }

    .quote-canvas__text {
        max-width: none;
        margin: 7px 0 4px;
        font-size: 0.68rem;
        line-height: 1.18;
        letter-spacing: 0;
    }

    .quote-canvas__author {
        font-size: 6px;
    }

    .chirabi-state {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .chirabi-sprite-film {
        transition: none !important;
    }

    body::after,
    .grid-bg {
        transform: none !important;
        will-change: auto;
    }

    .quote-canvas.is-changing .quote-canvas__text,
    .quote-canvas.is-changing .quote-canvas__author {
        filter: none;
        transform: none;
    }

    html.from-studio body {
        overflow: auto;
    }

    html.from-studio .studio-arrival {
        display: none;
    }

    html.from-studio .spark-app {
        animation: none;
    }
}