/* Card expand overlay + title / shimmering "Loading..." text */
.card-load-transition {
    position: fixed;
    z-index: 96;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    border-radius: var(--load-br-x, 16px) / var(--load-br-y, 16px);
    overflow: hidden;
    opacity: 1;
    pointer-events: none;
    transform-origin: top left;
    transform: translate3d(var(--load-x, 0px), var(--load-y, 0px), 0) scale3d(var(--load-sx, 1), var(--load-sy, 1), 1);
    transition:
        transform 820ms cubic-bezier(0.16, 1, 0.3, 1),
        border-radius 820ms cubic-bezier(0.16, 1, 0.3, 1),
        opacity 420ms cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow: 0 32px 80px rgba(0,0,0,0.42), 0 0 52px rgba(99,102,241,0.28);
    will-change: transform, border-radius, opacity;
    contain: layout paint style;
}

/* Category backgrounds matching the grid card-art perfectly */
.card-load-transition[data-cat="arcade"] {
    background:
        radial-gradient(circle at 50% 25%, rgba(217, 70, 239, 0.45), transparent 60%),
        radial-gradient(circle at 15% 75%, rgba(56, 189, 248, 0.25), transparent 45%),
        linear-gradient(160deg, #100a26, #030209);
}
.card-load-transition[data-cat="sandbox"] {
    background:
        radial-gradient(circle at 50% 25%, rgba(56, 189, 248, 0.45), transparent 60%),
        radial-gradient(circle at 15% 75%, rgba(20, 184, 166, 0.25), transparent 45%),
        linear-gradient(160deg, #051421, #01040a);
}
.card-load-transition[data-cat="puzzle"] {
    background:
        radial-gradient(circle at 50% 25%, rgba(245, 158, 11, 0.4), transparent 60%),
        radial-gradient(circle at 15% 75%, rgba(129, 140, 248, 0.25), transparent 45%),
        linear-gradient(160deg, #190e05, #050201);
}
.card-load-transition[data-cat="relax"] {
    background:
        radial-gradient(circle at 50% 25%, rgba(16, 185, 129, 0.4), transparent 60%),
        radial-gradient(circle at 15% 75%, rgba(14, 165, 233, 0.25), transparent 45%),
        linear-gradient(160deg, #031610, #010403);
}
.card-load-transition[data-cat="sports"] {
    background:
        radial-gradient(circle at 50% 25%, rgba(251, 146, 60, 0.45), transparent 60%),
        radial-gradient(circle at 15% 75%, rgba(239, 68, 68, 0.25), transparent 45%),
        linear-gradient(160deg, #1d0c05, #050201);
}

/* Individual game backgrounds matching the grid card-art perfectly */
.card-load-transition[data-art="blackjack"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(244, 63, 94, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(251, 191, 36, 0.22), transparent 40%),
        radial-gradient(circle at 80% 75%, rgba(255, 255, 255, 0.15), transparent 35%),
        linear-gradient(160deg, #160a22, #04020a);
}
.card-load-transition[data-art="comet-craft"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.48), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(168, 85, 247, 0.26), transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(34, 197, 94, 0.15), transparent 40%),
        linear-gradient(160deg, #051224, #01040a);
}
.card-load-transition[data-art="cometlife"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(52, 211, 153, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(14, 165, 233, 0.25), transparent 45%),
        linear-gradient(160deg, #031514, #000404);
}
.card-load-transition[data-art="cosmic-drop"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(217, 70, 239, 0.48), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(139, 92, 246, 0.28), transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(56, 189, 248, 0.15), transparent 40%),
        linear-gradient(160deg, #0e0524, #010107);
}
.card-load-transition[data-art="money-clicker"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(250, 204, 21, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(34, 197, 94, 0.32), transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.1), transparent 35%),
        linear-gradient(160deg, #051408, #010502);
}
.card-load-transition[data-art="sandbox"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.48), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(20, 184, 166, 0.24), transparent 45%),
        linear-gradient(160deg, #03111f, #01040a);
}
.card-load-transition[data-art="void-breaker"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(168, 85, 247, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(56, 189, 248, 0.25), transparent 45%),
        linear-gradient(160deg, #0a031e, #010006);
}
.card-load-transition[data-art="dead-signal"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(239, 68, 68, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(249, 115, 22, 0.25), transparent 45%),
        linear-gradient(160deg, #160305, #040101);
}
.card-load-transition[data-art="wikiflow"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(245, 158, 11, 0.42), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(217, 70, 239, 0.22), transparent 45%),
        linear-gradient(160deg, #1c0f06, #050201);
}
.card-load-transition[data-art="perfect-circle"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(245, 158, 11, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(251, 146, 60, 0.2), transparent 45%),
        linear-gradient(160deg, #180d05, #040201);
}
.card-load-transition[data-art="kern-type"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(168, 85, 247, 0.42), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(244, 63, 94, 0.24), transparent 45%),
        linear-gradient(160deg, #130722, #04020a);
}
.card-load-transition[data-art="skyline"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(217, 70, 239, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(56, 189, 248, 0.25), transparent 45%),
        linear-gradient(160deg, #0e051e, #020108);
}
.card-load-transition[data-art="stones"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(148, 163, 184, 0.35), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(16, 185, 129, 0.22), transparent 45%),
        linear-gradient(160deg, #081116, #020406);
}
.card-load-transition[data-art="fluid"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.48), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(16, 185, 129, 0.25), transparent 45%),
        linear-gradient(160deg, #02121c, #010408);
}
.card-load-transition[data-art="flux"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(16, 185, 129, 0.42), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(56, 189, 248, 0.25), transparent 45%),
        linear-gradient(160deg, #021410, #000403);
}
.card-load-transition[data-art="crystal"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(217, 70, 239, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(245, 158, 11, 0.25), transparent 45%),
        linear-gradient(160deg, #140521, #04010a);
}
.card-load-transition[data-art="pong"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(217, 70, 239, 0.42), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(56, 189, 248, 0.25), transparent 45%),
        linear-gradient(160deg, #0c081e, #010106);
}
.card-load-transition[data-art="flappy"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.48), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(16, 185, 129, 0.22), transparent 45%),
        linear-gradient(160deg, #041221, #01040a);
}
.card-load-transition[data-art="battleship"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(56, 189, 248, 0.42), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(245, 158, 11, 0.2), transparent 45%),
        linear-gradient(160deg, #040d1f, #01030a);
}
.card-load-transition[data-art="retro-bowl"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(34, 197, 94, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(251, 146, 60, 0.2), transparent 45%),
        linear-gradient(160deg, #051408, #010402);
}
.card-load-transition[data-art="basket-random"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(251, 146, 60, 0.48), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(56, 189, 248, 0.22), transparent 45%),
        linear-gradient(160deg, #1a0b04, #050201);
}
.card-load-transition[data-art="baseball-bros"] {
    background:
        radial-gradient(circle at 50% 30%, rgba(251, 146, 60, 0.45), transparent 55%),
        radial-gradient(circle at 20% 75%, rgba(16, 185, 129, 0.22), transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(244, 63, 94, 0.15), transparent 40%),
        linear-gradient(160deg, #1c0c05, #050201);
}

/* Rotating light-field backing inside the transition card */
.card-load-transition::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background:
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.08), transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(var(--c-rgb, 56, 189, 248), 0.15), transparent 60%);
    opacity: 0.8;
    mix-blend-mode: plus-lighter;
    transform: rotate(0deg);
    animation: transitionDrift 24s linear infinite;
    transform-origin: center center;
    pointer-events: none;
    will-change: transform;
}
@keyframes transitionDrift {
    to { transform: rotate(360deg); }
}

/* Beautiful organic full-screen cinematic overlay that blooms in */
.card-load-transition::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 50% 50%, transparent 20%, rgba(2, 3, 10, 0.94) 80%),
        linear-gradient(180deg, rgba(2, 3, 10, 0.3) 0%, rgba(2, 3, 10, 0.96) 100%);
    opacity: 0;
    transition: opacity 820ms cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
}
.card-load-transition.expanding::after {
    opacity: 0.88;
}

.card-load-transition.expanding {
    transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
    border-radius: 0px / 0px;
}
.card-load-transition.fading {
    opacity: 0;
    transform: translate3d(0, 0, 0) scale3d(1.04, 1.04, 1);
    transition:
        transform 640ms cubic-bezier(0.22, 1, 0.36, 1),
        opacity 480ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* Staggered Cinematic Text / Logo Appears */
.transition-brand {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    z-index: 97;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    pointer-events: none;
}
.transition-brand .transition-logo {
    opacity: 0;
    transform: translate3d(0, 24px, 0) scale3d(0.95, 0.95, 1);
    filter: drop-shadow(0 18px 50px rgba(14, 165, 233, 0.28));
    transition: 
        background-position 1200ms linear,
        opacity 720ms cubic-bezier(0.16, 1, 0.3, 1) 280ms, 
        transform 820ms cubic-bezier(0.16, 1, 0.3, 1) 240ms;
    will-change: opacity, transform;
}
.transition-brand.visible .transition-logo {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
}

.transition-brand .transition-loading {
    opacity: 0;
    transform: translate3d(0, 12px, 0);
    transition: 
        opacity 620ms cubic-bezier(0.16, 1, 0.3, 1) 480ms, 
        transform 720ms cubic-bezier(0.16, 1, 0.3, 1) 440ms;
    will-change: opacity, transform;
}
.transition-brand.visible .transition-loading {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

.transition-brand.fading .transition-logo {
    opacity: 0;
    transform: translate3d(0, -16px, 0) scale3d(0.96, 0.96, 1);
    transition: 
        opacity 400ms cubic-bezier(0.22, 1, 0.36, 1), 
        transform 400ms cubic-bezier(0.22, 1, 0.36, 1);
}
.transition-brand.fading .transition-loading {
    opacity: 0;
    transform: translate3d(0, -8px, 0);
    transition: 
        opacity 350ms cubic-bezier(0.22, 1, 0.36, 1), 
        transform 350ms cubic-bezier(0.22, 1, 0.36, 1);
}

.transition-logo {
    font-size: clamp(2.1rem, 5.8vw, 5.2rem);
    font-weight: 950;
    letter-spacing: 0.075em;
    text-transform: uppercase;
    background: linear-gradient(100deg, #f5d0fe 0%, #a78bfa 32%, #38bdf8 62%, #dbeafe 100%);
    background-size: 220% auto;
    background-position: 0 center;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 44px rgba(99,102,241,0.34);
    animation: logoGlow 4s ease-in-out infinite;
}
.transition-brand.visible .transition-logo {
    background-position: 100% center;
}
@keyframes logoGlow {
    0%, 100% { text-shadow: 0 0 32px rgba(167, 139, 250, 0.35), 0 0 64px rgba(56, 189, 248, 0.22); }
    50% { text-shadow: 0 0 48px rgba(167, 139, 250, 0.6), 0 0 88px rgba(56, 189, 248, 0.4); }
}

.transition-loading {
    display: inline-block;
    font-weight: 700;
    font-size: clamp(0.86rem, 1.35vw, 1rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.38) 0%,
        rgba(255, 255, 255, 0.38) 42%,
        #ffffff 50%,
        rgba(255, 255, 255, 0.38) 58%,
        rgba(255, 255, 255, 0.38) 100%
    );
    background-size: 220% 100%;
    background-position: 100% center;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    animation: transitionLoadingShimmer 2s linear infinite;
}
@keyframes transitionLoadingShimmer {
    to { background-position: -100% center; }
}
@media (prefers-reduced-motion: reduce) {
    .transition-logo { animation: none; }
    .transition-loading {
        animation: none;
        background-position: 50% center;
        -webkit-text-fill-color: rgba(255, 255, 255, 0.72);
        color: rgba(255, 255, 255, 0.72);
    }
}
.chromebook-mode .transition-loading {
    animation-timing-function: linear;
}
.chromebook-mode.chromebook-perf-low .transition-loading {
    animation: none !important;
}