.schulte-preview {
    --schulte-preview-ink: #10243d;
    --schulte-preview-muted: #60728a;
    --schulte-preview-line: rgba(36, 126, 181, 0.16);
    --schulte-preview-blue: #2387ea;
    --schulte-preview-cyan: #15b9d5;
    --schulte-preview-soft: #f6fbff;
    position: relative;
    width: min(100%, 410px);
    border: 1px solid rgba(36, 126, 181, 0.16);
    border-radius: 24px;
    background: linear-gradient(180deg, #ffffff, #edf8ff);
    box-shadow: 0 24px 56px rgba(13, 48, 86, 0.16);
    padding: 26px;
}

.schulte-preview--hero {
    width: min(100%, 460px);
    padding: 30px;
}

.schulte-preview--compact {
    width: min(100%, 340px);
    padding: 18px;
    border-radius: 18px;
    box-shadow: 0 16px 36px rgba(13, 48, 86, 0.13);
}

.schulte-preview--card {
    width: min(87%, 310px);
    padding: 5px;
    border-radius: 16px;
    box-shadow: 0 14px 30px rgba(13, 48, 86, 0.12);
}

.game-card__media-link .schulte-preview--compact {
    width: min(58%, 220px);
    padding: 12px;
    border-radius: 16px;
}

.game-card__media-link .schulte-preview--card {
    width: min(90%, 330px);
    max-width: min(90%, 330px);
}

.game-card__media-link .memory-preview--card {
    max-width: min(90%, 350px);
}

.game-card__media-link .color-preview--card {
    max-width: min(90%, 350px);
}

.game-card__media-link .mirror-mosaic-preview--card {
    max-width: min(90%, 350px);
}

.how-to-play-preview-stack--color-shades {
    width: min(100%, 460px);
}

.how-to-play-preview-stack--matrix-difference {
    width: min(100%, 460px);
}

.how-to-play-preview-stack--mirror-mosaic {
    width: min(100%, 460px);
}

.schulte-preview__header {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
    color: var(--schulte-preview-muted);
    font-size: 0.86rem;
    font-weight: 800;
}

.schulte-preview__header strong {
    color: var(--schulte-preview-blue);
}

.schulte-preview__board {
    display: grid;
    grid-template-columns: repeat(var(--schulte-preview-columns, 4), 1fr);
    gap: 9px;
    border-radius: 14px;
    transition: box-shadow 300ms ease, transform 300ms ease;
}

.schulte-preview--compact .schulte-preview__board {
    gap: 7px;
}

.schulte-preview--card .schulte-preview__board {
    aspect-ratio: 4 / 3;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(3, minmax(0, 1fr));
    gap: 5px;
    width: 100%;
    min-width: 0;
    min-height: 0;
    padding: 8px;
}

.game-card__media-link .schulte-preview--compact .schulte-preview__board {
    gap: 6px;
}

.schulte-preview__cell {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 10px;
    background: #ffffff;
    color: #16324f;
    font: inherit;
    font-size: 1.08rem;
    font-weight: 800;
    box-shadow: inset 0 0 0 1px rgba(55, 120, 246, 0.15);
    transition: background 220ms ease, color 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.schulte-preview--hero .schulte-preview__cell {
    font-size: 1.18rem;
}

.schulte-preview--compact .schulte-preview__cell {
    border-radius: 8px;
    font-size: 0.96rem;
}

.schulte-preview--card .schulte-preview__cell {
    aspect-ratio: auto;
    min-width: 0;
    min-height: 0;
    border-radius: 8px;
    font-size: 1.08rem;
    line-height: 1;
}

.schulte-preview--card .schulte-preview__cell.is-current,
.schulte-preview--card .bp-schulte-demo-cell.is-current {
    transform: none;
}

.schulte-preview--card .schulte-preview__complete-badge {
    display: none;
}

.game-card__media-link .schulte-preview--compact .schulte-preview__cell {
    border-radius: 7px;
    font-size: 0.86rem;
}

.schulte-preview__cell.is-solved,
.schulte-preview__cell.is-current,
.bp-schulte-demo-cell.is-solved,
.bp-schulte-demo-cell.is-current {
    background: linear-gradient(135deg, var(--schulte-preview-cyan), var(--schulte-preview-blue));
    color: #ffffff;
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.28),
        0 10px 22px rgba(18, 120, 215, 0.24);
}

.schulte-preview__cell.is-current,
.bp-schulte-demo-cell.is-current {
    transform: scale(1.06);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.34),
        0 14px 28px rgba(18, 120, 215, 0.32);
}

.schulte-preview__complete-badge {
    position: absolute;
    top: 46px;
    left: 26px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    width: fit-content;
    min-height: 26px;
    padding: 6px 10px;
    border-radius: 999px;
    background: #e8fbff;
    color: #087d95;
    font-size: 0.72rem;
    font-weight: 900;
    line-height: 1;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 180ms ease, transform 180ms ease;
    pointer-events: none;
}

.schulte-preview--compact .schulte-preview__complete-badge {
    top: 34px;
    left: 18px;
}

.schulte-preview__complete-badge.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.schulte-preview__play-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: min(100%, 190px);
    min-height: 42px;
    margin-top: 16px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--schulte-preview-blue), var(--schulte-preview-cyan));
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 900;
    line-height: 1;
    box-shadow: 0 12px 24px rgba(18, 120, 215, 0.18);
    transition: transform 180ms ease, box-shadow 180ms ease;
}

.schulte-preview__play-more:hover,
.schulte-preview__play-more:focus {
    color: #ffffff;
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 16px 30px rgba(18, 120, 215, 0.24);
}

.schulte-preview__play-more[hidden] {
    display: none;
}

.bp-schulte-demo-board.is-complete,
.schulte-preview__board.is-complete {
    animation: schulte-preview-complete 900ms ease both;
}

@keyframes schulte-preview-complete {
    0% {
        box-shadow: none;
        transform: scale(1);
    }

    45% {
        box-shadow: 0 0 0 8px rgba(18, 184, 215, 0.1), 0 18px 32px rgba(18, 120, 215, 0.16);
        transform: scale(1.015);
    }

    100% {
        box-shadow: 0 0 0 4px rgba(18, 184, 215, 0.06);
        transform: scale(1);
    }
}

.memory-preview {
    --memory-preview-ink: #10243d;
    --memory-preview-line: rgba(36, 126, 181, 0.16);
    --memory-preview-blue: #2387ea;
    --memory-preview-cyan: #15b9d5;
    --memory-preview-teal: #12b8a6;
    --memory-preview-lilac: #9f73f7;
    --memory-preview-pink: #f25aa6;
    --memory-preview-gold: #f6b938;
    --memory-preview-warn: #f28b5b;
    --memory-preview-padding: clamp(14px, 6%, 22px);
    --memory-preview-grid-size: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    width: 100%;
    min-width: 0;
    aspect-ratio: 1.22;
    overflow: hidden;
    border: 1px solid var(--memory-preview-line);
    border-radius: 18px;
    background:
        radial-gradient(circle at 18% 18%, rgba(21, 185, 213, 0.14), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, #f2fbff 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86);
    padding: var(--memory-preview-padding);
}

.memory-preview--small {
    --memory-preview-padding: 12px;
    --memory-preview-grid-size: 160px;
    max-width: 180px;
    border-radius: 14px;
}

.memory-preview--medium {
    max-width: 270px;
}

.memory-preview--card {
    --memory-preview-padding: 5px;
    --memory-preview-grid-size: 304px;
    width: min(87%, 330px);
    max-width: 330px;
    aspect-ratio: auto;
    border-radius: 16px;
}

.memory-preview--card .memory-preview__stage {
    height: auto;
    margin-top: 12px;
    padding: 0 2px;
}

.how-to-play-preview-stack .memory-preview,
.memory-preview--hero {
    --memory-preview-padding: clamp(18px, 6%, 28px);
    --memory-preview-grid-size: 290px;
    max-width: 340px;
    aspect-ratio: 1.16;
    border-radius: 22px;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.9),
        0 18px 42px rgba(13, 48, 86, 0.13);
}

.memory-preview--large {
    --memory-preview-grid-size: 320px;
    max-width: 380px;
    border-radius: 22px;
}

.memory-preview__stage {
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
}

.memory-preview__grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(3, minmax(0, 1fr));
    gap: clamp(6px, 4%, 10px);
    width: min(100%, var(--memory-preview-grid-size));
    aspect-ratio: 4.5 / 3;
    min-width: 0;
    min-height: 0;
}

.memory-preview--small .memory-preview__grid {
    gap: 5px;
}

.memory-preview--card .memory-preview__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-template-rows: repeat(3, minmax(0, 1fr));
    gap: 5px;
    aspect-ratio: 4 / 3;
    width: min(100%, var(--memory-preview-grid-size));
}

.memory-preview--large .memory-preview__grid {
    gap: 12px;
}

.how-to-play-preview-stack .memory-preview__grid,
.memory-preview--hero .memory-preview__grid {
    gap: clamp(8px, 4%, 12px);
}

.memory-preview__card {
    position: relative;
    display: block;
    min-width: 0;
    aspect-ratio: 1;
    border-radius: 12px;
    perspective: 700px;
}

.memory-preview--card .memory-preview__card {
    aspect-ratio: 1.2 / 1;
    border-radius: 8px;
}

.memory-preview--card .memory-preview__shape--sun::before {
    width: 58%;
}

.memory-preview--card .memory-preview__shape--moon::before {
    width: 64%;
}

.memory-preview--card .memory-preview__shape--moon::after {
    width: 56%;
}

.memory-preview--card .memory-preview__shape--star::before {
    width: 72%;
}

.memory-preview--card .memory-preview__shape--heart::before,
.memory-preview--card .memory-preview__shape--heart::after {
    width: 44%;
}

.memory-preview--card .memory-preview__shape--bolt::before,
.memory-preview--card .memory-preview__shape--diamond::before {
    width: 62%;
}

.memory-preview__card::after {
    content: "";
    position: absolute;
    inset: -8px;
    z-index: 0;
    border-radius: 16px;
    border: 2px solid rgba(18, 184, 166, 0.34);
    opacity: 0;
    transform: scale(0.88);
    pointer-events: none;
}

.memory-preview__card-inner {
    position: relative;
    z-index: 1;
    display: block;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

.memory-preview__card--mismatch-a .memory-preview__card-inner {
    animation: memory-preview-mismatch-a 7.2s ease-in-out infinite;
}

.memory-preview__card--mismatch-b .memory-preview__card-inner {
    animation: memory-preview-mismatch-b 7.2s ease-in-out infinite;
}

.memory-preview__card--match-a .memory-preview__card-inner {
    animation: memory-preview-match-a 7.2s ease-in-out infinite;
}

.memory-preview__card--match-b .memory-preview__card-inner {
    animation: memory-preview-match-b 7.2s ease-in-out infinite;
}

.memory-preview__card-front,
.memory-preview__card-back {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: inherit;
    backface-visibility: hidden;
}

.memory-preview__card-front {
    border: 1px solid rgba(35, 135, 234, 0.22);
    background:
        radial-gradient(circle at 72% 22%, rgba(255, 255, 255, 0.42), transparent 21%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.24) 0 24%, transparent 24% 100%),
        linear-gradient(135deg, #8060ec 0%, #15b9d5 100%);
    box-shadow: 0 12px 24px rgba(43, 124, 216, 0.18);
}

.memory-preview__card-front::before {
    content: "";
    width: 46%;
    aspect-ratio: 1;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.78);
    transform: rotate(45deg);
}

.memory-preview__card-back {
    border: 1px solid rgba(18, 184, 166, 0.28);
    background: #ffffff;
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.7),
        0 14px 28px rgba(13, 48, 86, 0.13);
    transform: rotateY(180deg);
}

.memory-preview__shape::before,
.memory-preview__shape::after {
    content: "";
    position: absolute;
    display: block;
}

.memory-preview__shape--sun::before {
    width: 48%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--memory-preview-gold);
    box-shadow: 0 0 0 8px rgba(246, 185, 56, 0.24);
}

.memory-preview__shape--moon::before {
    width: 54%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--memory-preview-blue);
}

.memory-preview__shape--moon::after {
    width: 48%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: #ffffff;
    transform: translate(24%, -8%);
}

.memory-preview__shape--star::before {
    width: 62%;
    aspect-ratio: 1;
    background: var(--memory-preview-cyan);
    clip-path: polygon(50% 0, 61% 35%, 98% 35%, 68% 56%, 79% 91%, 50% 69%, 21% 91%, 32% 56%, 2% 35%, 39% 35%);
    filter: drop-shadow(0 6px 8px rgba(21, 185, 213, 0.22));
}

.memory-preview__shape--heart::before,
.memory-preview__shape--heart::after {
    width: 38%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--memory-preview-pink);
    transform: translate(-22%, -12%);
}

.memory-preview__shape--heart::after {
    transform: translate(22%, -12%);
}

.memory-preview__shape--heart {
    background:
        linear-gradient(45deg, transparent 39%, var(--memory-preview-pink) 40% 64%, transparent 65%) center 56% / 62% 62% no-repeat,
        #ffffff;
}

.memory-preview__shape--bolt::before {
    width: 52%;
    height: 60%;
    background: var(--memory-preview-lilac);
    clip-path: polygon(55% 0, 18% 49%, 47% 49%, 33% 100%, 82% 39%, 53% 39%);
    filter: drop-shadow(0 6px 8px rgba(159, 115, 247, 0.22));
}

.memory-preview__shape--diamond::before {
    width: 52%;
    aspect-ratio: 1;
    border-radius: 8px;
    background: var(--memory-preview-teal);
    transform: rotate(45deg);
    box-shadow: 0 8px 14px rgba(18, 184, 166, 0.2);
}

.memory-preview__card--matched {
    animation: memory-preview-success 7.2s ease-in-out infinite;
}

.memory-preview__card--matched::after {
    animation: memory-preview-success-ring 7.2s ease-in-out infinite;
}

.memory-preview__card--matched .memory-preview__card-back::after {
    width: 26%;
    height: 16%;
    right: 12%;
    bottom: 13%;
    border: 0;
    border-left: 3px solid var(--memory-preview-teal);
    border-bottom: 3px solid var(--memory-preview-teal);
    border-radius: 0;
    opacity: 0;
    transform: rotate(-45deg) scale(0.72);
    transform-origin: center;
    animation: memory-preview-success-check 7.2s ease-in-out infinite;
}

.memory-preview__card--mismatch-a {
    animation: memory-preview-mismatch-glow-a 7.2s ease-in-out infinite;
}

.memory-preview__card--mismatch-b {
    animation: memory-preview-mismatch-glow-b 7.2s ease-in-out infinite;
}

@keyframes memory-preview-mismatch-a {
    0%, 8% {
        transform: rotateY(0);
    }

    16%, 33% {
        transform: rotateY(180deg);
    }

    41%, 100% {
        transform: rotateY(0);
    }
}

@keyframes memory-preview-mismatch-b {
    0%, 18% {
        transform: rotateY(0);
    }

    26%, 33% {
        transform: rotateY(180deg);
    }

    41%, 100% {
        transform: rotateY(0);
    }
}

@keyframes memory-preview-match-a {
    0%, 46% {
        transform: rotateY(0);
    }

    54%, 88% {
        transform: rotateY(180deg);
    }

    96%, 100% {
        transform: rotateY(0);
    }
}

@keyframes memory-preview-match-b {
    0%, 56% {
        transform: rotateY(0);
    }

    64%, 88% {
        transform: rotateY(180deg);
    }

    96%, 100% {
        transform: rotateY(0);
    }
}

@keyframes memory-preview-success {
    0%, 61% {
        box-shadow: none;
        transform: scale(1);
    }

    66% {
        box-shadow: 0 0 0 4px rgba(18, 184, 166, 0.12), 0 10px 20px rgba(18, 184, 166, 0.14);
        transform: scale(1.02);
    }

    70% {
        box-shadow: 0 0 0 7px rgba(18, 184, 166, 0.18), 0 16px 30px rgba(18, 184, 166, 0.22);
        transform: scale(1.055);
    }

    78%, 88% {
        box-shadow: 0 0 0 6px rgba(18, 184, 166, 0.15), 0 14px 28px rgba(18, 184, 166, 0.18);
        transform: scale(1.025);
    }

    96%, 100% {
        box-shadow: none;
        transform: scale(1);
    }
}

@keyframes memory-preview-success-ring {
    0%, 63% {
        opacity: 0;
        transform: scale(0.88);
    }

    68% {
        opacity: 0.42;
        transform: scale(1);
    }

    76% {
        opacity: 0.12;
        transform: scale(1.22);
    }

    82%, 100% {
        opacity: 0;
        transform: scale(1.24);
    }
}

@keyframes memory-preview-success-check {
    0%, 64% {
        opacity: 0;
        transform: rotate(-45deg) scale(0.72);
    }

    70%, 88% {
        opacity: 0.92;
        transform: rotate(-45deg) scale(1);
    }

    96%, 100% {
        opacity: 0;
        transform: rotate(-45deg) scale(0.86);
    }
}

@keyframes memory-preview-mismatch-glow-a {
    0%, 24% {
        box-shadow: none;
        transform: scale(1);
    }

    29%, 36% {
        box-shadow: 0 0 0 5px rgba(242, 139, 91, 0.16), 0 12px 24px rgba(242, 139, 91, 0.14);
        transform: scale(1.025);
    }

    44%, 100% {
        box-shadow: none;
        transform: scale(1);
    }
}

@keyframes memory-preview-mismatch-glow-b {
    0%, 25% {
        box-shadow: none;
        transform: scale(1);
    }

    30%, 36% {
        box-shadow: 0 0 0 5px rgba(242, 139, 91, 0.16), 0 12px 24px rgba(242, 139, 91, 0.14);
        transform: scale(1.025);
    }

    44%, 100% {
        box-shadow: none;
        transform: scale(1);
    }
}

@media (prefers-reduced-motion: reduce) {
    .schulte-preview,
    .schulte-preview__board,
    .schulte-preview__cell,
    .schulte-preview__complete-badge,
    .schulte-preview__play-more,
    .memory-preview__card,
    .memory-preview__card-inner,
    .memory-preview__card--matched::after,
    .memory-preview__card--matched .memory-preview__card-back::after {
        transition: none;
        animation: none !important;
    }

    .bp-schulte-demo-board.is-complete,
    .schulte-preview__board.is-complete {
        animation: none;
    }

    .schulte-preview__cell.is-current,
    .bp-schulte-demo-cell.is-current {
        transform: none;
    }

    .memory-preview__card--match-a .memory-preview__card-inner,
    .memory-preview__card--match-b .memory-preview__card-inner {
        transform: rotateY(180deg) !important;
    }

    .memory-preview__card--matched {
        box-shadow: 0 0 0 6px rgba(18, 184, 166, 0.16), 0 14px 28px rgba(18, 184, 166, 0.18);
    }

    .memory-preview__card--matched::after {
        opacity: 0;
    }

.memory-preview__card--matched .memory-preview__card-back::after {
        opacity: 0.92;
        transform: rotate(-45deg) scale(1);
    }
}

.color-preview {
    --color-preview-line: rgba(36, 126, 181, 0.16);
    --color-preview-teal: #12b8a6;
    --color-preview-cyan: #15b9d5;
    --color-preview-blue: #2387ea;
    --color-preview-padding: clamp(9px, 3.5%, 13px);
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    width: min(94%, 374px);
    max-width: 374px;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--color-preview-line);
    border-radius: 16px;
    background:
        radial-gradient(circle at 84% 18%, rgba(170, 119, 247, 0.14), transparent 30%),
        radial-gradient(circle at 12% 82%, rgba(21, 185, 213, 0.16), transparent 34%),
        linear-gradient(180deg, #ffffff 0%, #f2fbff 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86);
    padding: var(--color-preview-padding);
}

.color-preview__stage {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-width: 0;
}

.color-preview--guide {
    --color-preview-padding: clamp(16px, 4vw, 22px);
    width: min(100%, 460px);
    max-width: 460px;
    border-radius: 22px;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.9),
        0 18px 42px rgba(13, 48, 86, 0.13);
}

.color-preview--guide .color-preview__sequence {
    gap: clamp(4px, 1.5vw, 10px);
}

.color-preview--guide .color-preview__tile {
    max-width: 62px;
    border-radius: 13px;
}

.color-preview--guide .color-preview__marker {
    width: clamp(22px, 4vw, 28px);
    height: clamp(22px, 4vw, 28px);
    font-size: clamp(0.72rem, 1.5vw, 0.84rem);
}

.color-preview--guide .color-preview__arrow {
    flex-basis: clamp(14px, 3vw, 24px);
    width: clamp(14px, 3vw, 24px);
    margin-top: clamp(32px, 6vw, 44px);
}

.color-preview__sequence {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(2px, 1.25vw, 7px);
    width: 100%;
    min-width: 0;
    padding: 2px 0;
}

.color-preview__step {
    position: relative;
    display: grid;
    grid-template-rows: auto auto;
    gap: clamp(4px, 1.35vw, 7px);
    align-items: center;
    justify-items: center;
    flex: 1 1 0;
    min-width: 0;
}

.color-preview__tile {
    position: relative;
    display: block;
    width: 100%;
    max-width: 52px;
    aspect-ratio: 3 / 4;
    min-width: 0;
    overflow: visible;
    border-radius: 11px;
    background: var(--color-preview-step, linear-gradient(135deg, #1b6fd8, #2aa9dc));
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.58),
        0 9px 18px rgba(13, 78, 92, 0.1);
    transition: box-shadow 260ms ease, transform 260ms ease;
}

.color-preview__step--1 { --color-preview-step: linear-gradient(135deg, #1d5fc7, #2d48b0); }
.color-preview__step--2 { --color-preview-step: linear-gradient(135deg, #267fd5, #3864ca); }
.color-preview__step--3 { --color-preview-step: linear-gradient(135deg, #2fa5dd, #5388dc); }
.color-preview__step--4 { --color-preview-step: linear-gradient(135deg, #5dc6df, #75a4e4); }
.color-preview__step--5 { --color-preview-step: linear-gradient(135deg, #98dde4, #b998e9); }
.color-preview__step--6 { --color-preview-step: linear-gradient(135deg, #d0f1ef, #edc4e3); }

.color-preview__marker {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(17px, 4.4vw, 22px);
    height: clamp(17px, 4.4vw, 22px);
    border: 1px solid rgba(35, 135, 234, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.82);
    color: #1d5e93;
    font-size: clamp(0.6rem, 2vw, 0.72rem);
    font-weight: 900;
    line-height: 1;
    box-shadow: 0 5px 12px rgba(13, 78, 92, 0.08);
    transition: background-color 220ms ease, border-color 220ms ease, color 220ms ease, transform 220ms ease;
}

.color-preview__arrow {
    position: relative;
    display: block;
    flex: 0 1 13px;
    width: clamp(8px, 2.8vw, 15px);
    height: 2px;
    margin-top: clamp(25px, 7.8vw, 36px);
    border-radius: 999px;
    background: rgba(88, 112, 141, 0.25);
    transition: background-color 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.color-preview__arrow::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -1px;
    width: 6px;
    height: 6px;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
    color: rgba(88, 112, 141, 0.3);
    transform: translateY(-50%) rotate(45deg);
    transition: color 220ms ease;
}

.color-preview__step.is-active .color-preview__marker {
    border-color: rgba(18, 184, 166, 0.42);
    background: linear-gradient(135deg, #12b8d7, #2387ea);
    color: #fff;
    transform: translateY(-1px) scale(1.03);
}

.color-preview__step.is-active .color-preview__tile {
    transform: translateY(-2px) scale(1.075);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.74),
        0 0 0 5px rgba(18, 184, 166, 0.16),
        0 16px 28px rgba(35, 135, 234, 0.22);
    animation: color-preview-step-pulse 760ms ease-in-out;
}

.color-preview__step.is-complete .color-preview__marker {
    border-color: rgba(18, 184, 166, 0.22);
    background: rgba(234, 251, 249, 0.94);
    color: #087d95;
}

.color-preview__arrow.is-active {
    background: linear-gradient(90deg, #12b8d7, #2387ea);
    box-shadow: 0 0 0 4px rgba(18, 184, 166, 0.08);
}

.color-preview__arrow.is-active::after {
    color: #2387ea;
}

@keyframes color-preview-step-pulse {
    0%, 100% {
        transform: translateY(-2px) scale(1.055);
    }

    48% {
        transform: translateY(-3px) scale(1.115);
    }
}

@media (prefers-reduced-motion: reduce) {
    .color-preview__step,
    .color-preview__tile,
    .color-preview__marker,
    .color-preview__arrow,
    .color-preview__arrow::after {
        animation: none !important;
        transition: none;
    }
}

.matrix-difference-preview {
    --matrix-difference-line: rgba(36, 126, 181, 0.16);
    --matrix-difference-blue: #2387ea;
    --matrix-difference-cyan: #15b9d5;
    --matrix-difference-teal: #12b8a6;
    --matrix-difference-ink: #16324f;
    --matrix-difference-padding: clamp(10px, 3.5%, 14px);
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    width: min(94%, 374px);
    max-width: 374px;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--matrix-difference-line);
    border-radius: 16px;
    background:
        radial-gradient(circle at 80% 18%, rgba(18, 184, 166, 0.14), transparent 30%),
        radial-gradient(circle at 14% 84%, rgba(35, 135, 234, 0.13), transparent 34%),
        linear-gradient(180deg, #ffffff 0%, #f2fbff 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86);
    padding: var(--matrix-difference-padding);
}

.matrix-difference-preview--guide {
    width: min(100%, 460px);
    max-width: 460px;
    padding: clamp(16px, 4vw, 22px);
    border-radius: 22px;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.9),
        0 18px 42px rgba(13, 48, 86, 0.13);
}

.matrix-difference-preview--guide .matrix-difference-preview__grid-group {
    width: min(100%, 340px);
}

.matrix-difference-preview--guide .matrix-difference-preview__grid {
    gap: clamp(6px, 1.4vw, 8px);
    padding: clamp(8px, 1.8vw, 11px);
    border-radius: 16px;
}

.matrix-difference-preview--guide .matrix-difference-preview__cell {
    border-radius: 10px;
}

.matrix-difference-preview__stage {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-width: 0;
}

.matrix-difference-preview__grid-group {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(10px, 5%, 18px);
    width: min(100%, 292px);
    min-width: 0;
}

.matrix-difference-preview__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-rows: repeat(3, minmax(0, 1fr));
    gap: 5px;
    min-width: 0;
    padding: 7px;
    border-radius: 13px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow:
        inset 0 0 0 1px rgba(35, 135, 234, 0.12),
        0 10px 22px rgba(13, 48, 86, 0.08);
}

.matrix-difference-preview__grid--changed {
    background: rgba(232, 251, 255, 0.84);
}

.matrix-difference-preview__cell {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
    min-width: 0;
    border-radius: 8px;
    background: #ffffff;
    box-shadow: inset 0 0 0 1px rgba(35, 135, 234, 0.14);
    transition: box-shadow 240ms ease, transform 240ms ease, background-color 240ms ease;
}

.matrix-difference-preview__cell::after {
    content: "";
    position: absolute;
    inset: -4px;
    border: 2px solid var(--matrix-difference-teal);
    border-radius: 11px;
    opacity: 0;
    transform: scale(0.88);
    transition: opacity 240ms ease, transform 240ms ease;
    pointer-events: none;
}

.matrix-difference-preview__cell.is-found {
    transform: scale(1.035);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.8),
        0 0 0 5px rgba(18, 184, 166, 0.12),
        0 14px 26px rgba(35, 135, 234, 0.18);
}

.matrix-difference-preview__cell.is-found::after {
    opacity: 0.72;
    transform: scale(1);
}

.matrix-difference-preview__cell.is-success {
    background: #ecfffb;
    animation: matrix-difference-preview-success 840ms ease both;
}

.matrix-difference-preview__shape {
    position: relative;
    display: block;
    width: 58%;
    aspect-ratio: 1;
    color: var(--matrix-difference-blue);
}

.matrix-difference-preview__shape::before,
.matrix-difference-preview__shape::after {
    content: "";
    position: absolute;
    display: block;
}

.matrix-difference-preview__shape--dot::before,
.matrix-difference-preview__shape--small-dot::before {
    inset: 18%;
    border-radius: 50%;
    background: var(--matrix-difference-cyan);
}

.matrix-difference-preview__shape--small-dot::before {
    inset: 28%;
}

.matrix-difference-preview__shape--diamond::before {
    inset: 16%;
    border-radius: 6px;
    background: var(--matrix-difference-teal);
    transform: rotate(45deg);
}

.matrix-difference-preview__shape--bar::before,
.matrix-difference-preview__shape--pill::before {
    inset: 34% 6%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--matrix-difference-blue), var(--matrix-difference-cyan));
}

.matrix-difference-preview__shape--pill::before {
    inset: 20% 18%;
}

.matrix-difference-preview__shape--ring::before {
    inset: 13%;
    border: 4px solid var(--matrix-difference-blue);
    border-radius: 50%;
}

.matrix-difference-preview__shape--cross::before,
.matrix-difference-preview__shape--cross::after {
    inset: 10% 42%;
    border-radius: 999px;
    background: var(--matrix-difference-cyan);
}

.matrix-difference-preview__shape--cross::after {
    transform: rotate(90deg);
}

.matrix-difference-preview__shape--triangle::before {
    inset: 10%;
    background: var(--matrix-difference-teal);
    clip-path: polygon(50% 0, 100% 90%, 0 90%);
}

.matrix-difference-preview__shape--wave::before {
    inset: 22% 4%;
    border-top: 4px solid var(--matrix-difference-blue);
    border-radius: 50%;
    transform: rotate(-12deg);
}

.matrix-difference-preview__shape--star::before {
    inset: 6%;
    background: linear-gradient(135deg, var(--matrix-difference-cyan), var(--matrix-difference-blue));
    clip-path: polygon(50% 0, 61% 35%, 98% 35%, 68% 56%, 79% 91%, 50% 69%, 21% 91%, 32% 56%, 2% 35%, 39% 35%);
    filter: drop-shadow(0 6px 8px rgba(21, 185, 213, 0.22));
}

@keyframes matrix-difference-preview-success {
    0%, 100% {
        box-shadow:
            inset 0 0 0 1px rgba(255, 255, 255, 0.8),
            0 0 0 5px rgba(18, 184, 166, 0.12),
            0 14px 26px rgba(35, 135, 234, 0.18);
    }

    48% {
        box-shadow:
            inset 0 0 0 1px rgba(255, 255, 255, 0.86),
            0 0 0 8px rgba(18, 184, 166, 0.2),
            0 18px 34px rgba(18, 184, 166, 0.22);
    }
}

@media (prefers-reduced-motion: reduce) {
    .matrix-difference-preview__cell,
    .matrix-difference-preview__cell::after {
        transition: none;
        animation: none !important;
    }
}

.mirror-mosaic-preview {
    --mirror-mosaic-line: rgba(36, 126, 181, 0.16);
    --mirror-mosaic-blue: #2387ea;
    --mirror-mosaic-cyan: #15b9d5;
    --mirror-mosaic-teal: #12b8a6;
    --mirror-mosaic-purple: #8060ec;
    --mirror-mosaic-padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    width: min(87%, 330px);
    max-width: 330px;
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--mirror-mosaic-line);
    border-radius: 16px;
    background:
        radial-gradient(circle at 18% 18%, rgba(21, 185, 213, 0.13), transparent 30%),
        radial-gradient(circle at 84% 82%, rgba(128, 96, 236, 0.12), transparent 34%),
        linear-gradient(180deg, #ffffff 0%, #f2fbff 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86);
    padding: var(--mirror-mosaic-padding);
}

.mirror-mosaic-preview__stage {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-width: 0;
    padding: 8px 4px;
}

.mirror-mosaic-preview--guide {
    width: min(100%, 460px);
    max-width: 460px;
    padding: clamp(16px, 4vw, 22px);
    border-radius: 22px;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.9),
        0 18px 42px rgba(13, 48, 86, 0.13);
}

.mirror-mosaic-preview--guide .mirror-mosaic-preview__stage {
    padding: 4px 2px;
}

.mirror-mosaic-preview--guide .mirror-mosaic-preview__matrix-group {
    grid-template-columns: minmax(0, 1fr) 16px minmax(0, 1fr);
    gap: clamp(10px, 3vw, 16px);
    width: min(100%, 360px);
}

.mirror-mosaic-preview--guide .mirror-mosaic-preview__matrix {
    gap: clamp(7px, 1.4vw, 9px);
    padding: clamp(9px, 1.8vw, 12px);
    border-radius: 16px;
}

.mirror-mosaic-preview--guide .mirror-mosaic-preview__cell {
    border-radius: 10px;
}

.mirror-mosaic-preview__matrix-group {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 12px minmax(0, 1fr);
    gap: 7px;
    align-items: center;
    width: min(100%, 304px);
    min-width: 0;
}

.mirror-mosaic-preview__mirror-axis {
    position: relative;
    display: block;
    justify-self: center;
    width: 2px;
    height: 72%;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(35, 135, 234, 0.1), rgba(35, 135, 234, 0.64), rgba(18, 184, 166, 0.12));
    box-shadow: 0 0 0 4px rgba(18, 184, 166, 0.06);
}

.mirror-mosaic-preview__mirror-axis::before,
.mirror-mosaic-preview__mirror-axis::after {
    content: "";
    position: absolute;
    top: 50%;
    width: 5px;
    height: 5px;
    border-top: 2px solid rgba(35, 135, 234, 0.48);
    transform: translateY(-50%) rotate(45deg);
}

.mirror-mosaic-preview__mirror-axis::before {
    right: 5px;
    border-left: 2px solid rgba(35, 135, 234, 0.48);
}

.mirror-mosaic-preview__mirror-axis::after {
    left: 5px;
    border-right: 2px solid rgba(35, 135, 234, 0.48);
}

.mirror-mosaic-preview__matrix {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-template-rows: repeat(3, minmax(0, 1fr));
    gap: 6px;
    min-width: 0;
    padding: 8px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow:
        inset 0 0 0 1px rgba(35, 135, 234, 0.12),
        0 10px 22px rgba(13, 48, 86, 0.08);
}

.mirror-mosaic-preview__matrix--target {
    background: rgba(229, 249, 255, 0.9);
}

.mirror-mosaic-preview__cell {
    position: relative;
    display: block;
    aspect-ratio: 1;
    min-width: 0;
    overflow: hidden;
    border-radius: 9px;
    background: #ffffff;
    box-shadow: inset 0 0 0 1px rgba(35, 135, 234, 0.14);
    transition: background 220ms ease, box-shadow 220ms ease, transform 220ms ease, opacity 220ms ease;
}

.mirror-mosaic-preview__cell--empty {
    background:
        linear-gradient(135deg, rgba(35, 135, 234, 0.05), rgba(18, 184, 166, 0.05)),
        #ffffff;
}

.mirror-mosaic-preview__cell--target {
    background:
        linear-gradient(135deg, rgba(35, 135, 234, 0.08), rgba(18, 184, 166, 0.08)),
        rgba(255, 255, 255, 0.86);
    box-shadow:
        inset 0 0 0 1px rgba(35, 135, 234, 0.2),
        inset 0 0 0 3px rgba(255, 255, 255, 0.46);
}

.mirror-mosaic-preview__cell--primary {
    background: linear-gradient(135deg, var(--mirror-mosaic-cyan), var(--mirror-mosaic-blue));
}

.mirror-mosaic-preview__cell--secondary {
    background: linear-gradient(135deg, var(--mirror-mosaic-teal), #4ccfd8);
}

.mirror-mosaic-preview__cell--ternary {
    background: linear-gradient(135deg, var(--mirror-mosaic-purple), var(--mirror-mosaic-blue));
}

.mirror-mosaic-preview__cell--primary::after,
.mirror-mosaic-preview__cell--secondary::after,
.mirror-mosaic-preview__cell--ternary::after {
    content: "";
    position: absolute;
    inset: 22%;
    border: 2px solid rgba(255, 255, 255, 0.74);
    border-radius: 6px;
    transform: rotate(45deg);
}

.mirror-mosaic-preview__cell.is-filled {
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.64),
        0 10px 18px rgba(35, 135, 234, 0.14);
}

.mirror-mosaic-preview__cell.is-active {
    transform: scale(1.08);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.74),
        0 0 0 5px rgba(18, 184, 166, 0.16),
        0 14px 26px rgba(35, 135, 234, 0.2);
}

.mirror-mosaic-preview__matrix--source .mirror-mosaic-preview__cell.is-active {
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.76),
        0 0 0 5px rgba(35, 135, 234, 0.14),
        0 12px 24px rgba(35, 135, 234, 0.18);
}

.mirror-mosaic-preview__matrix--target.is-complete {
    animation: mirror-mosaic-target-complete 880ms ease both;
}

@keyframes mirror-mosaic-target-complete {
    0%, 100% {
        box-shadow:
            inset 0 0 0 1px rgba(35, 135, 234, 0.12),
            0 10px 22px rgba(13, 48, 86, 0.08);
    }

    48% {
        box-shadow:
            inset 0 0 0 1px rgba(255, 255, 255, 0.86),
            0 0 0 8px rgba(18, 184, 166, 0.14),
            0 18px 34px rgba(18, 184, 166, 0.2);
    }
}

@media (prefers-reduced-motion: reduce) {
    .mirror-mosaic-preview__cell,
    .mirror-mosaic-preview__matrix--source .mirror-mosaic-preview__cell,
    .mirror-mosaic-preview__matrix--target.is-complete {
        transition: none;
        animation: none !important;
    }

    .mirror-mosaic-preview__cell.is-active {
        transform: none;
    }
}

@media (max-width: 640px) {
    .schulte-preview,
    .schulte-preview--hero,
    .schulte-preview--compact {
        width: 100%;
        padding: 18px;
        border-radius: 18px;
    }

    .schulte-preview__board {
        gap: 6px;
    }

    .schulte-preview__cell,
    .schulte-preview--hero .schulte-preview__cell,
    .schulte-preview--compact .schulte-preview__cell {
        border-radius: 8px;
        font-size: 0.9rem;
    }

    .schulte-preview--card {
        width: min(87%, 310px);
        padding: 5px;
        border-radius: 16px;
    }

    .schulte-preview--card .schulte-preview__cell {
        border-radius: 8px;
        font-size: 1.08rem;
    }

    .schulte-preview__play-more {
        width: 100%;
    }

}