.mk-case-page {
    min-height: 100vh;
    background:
        radial-gradient(circle at top, rgba(72, 78, 101, 0.18), transparent 38%),
        linear-gradient(180deg, #111017 0%, #0b0b10 100%);
    color: var(--color-white);
}

.mk-case {
    width: min(1820px, 100%);
    margin: 0 auto;
    padding: 24px clamp(16px, 4vw, 40px) 40px;
}

.mk-case__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 28px;
}

.mk-case__back {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 999px;
    color: var(--color-white);
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.mk-case__back:hover,
.mk-case__back:focus-visible {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.52);
    outline: none;
}

.mk-case__heading {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 640px;
    margin-left: auto;
}

.mk-case__eyebrow {
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.58);
}

.mk-case__title {
    font-size: clamp(30px, 4vw, 56px);
    line-height: 0.98;
}

.mk-case__subtitle {
    max-width: 48ch;
    color: rgba(255, 255, 255, 0.68);
    font-size: 16px;
}

.mk-viewer {
    --mk-page-width: 842;
    --mk-page-height: 595;
    --mk-book-max-width: 1684px;
    --mk-zoom: 1;
    --mk-book-shift: 0%;
    --mk-surface: rgba(255, 255, 255, 0.04);
    --mk-border: rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mk-viewer__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 16px;
    border: 1px solid var(--mk-border);
    border-radius: 18px;
    background: rgba(15, 15, 19, 0.78);
    backdrop-filter: blur(18px);
}

.mk-viewer__controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mk-viewer__button {
    width: 44px;
    height: 44px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-white);
    font-size: 22px;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
}

.mk-viewer__button:hover,
.mk-viewer__button:focus-visible {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.3);
    outline: none;
}

.mk-viewer__button[disabled] {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
}

.mk-viewer__status {
    min-width: 110px;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.82);
}

.mk-viewer__status-separator {
    color: rgba(255, 255, 255, 0.45);
    margin: 0 6px;
}

.mk-viewer__viewport {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 0;
    background: transparent;
    overflow: hidden;
    min-height: clamp(260px, 48vw, 860px);
    padding: clamp(10px, 1.6vw, 20px) 0;
}

.mk-viewer__zoom-shell {
    width: var(--mk-book-max-width);
    max-width: 100%;
    margin: 0 auto;
    transform: scale(var(--mk-zoom)) translateX(var(--mk-book-shift));
    transform-origin: center top;
    transition: transform 180ms ease;
}

.mk-viewer__book-frame {
    position: relative;
    width: var(--mk-book-max-width);
    max-width: 100%;
    padding: clamp(8px, 1.2vw, 18px) 0;
}

.mk-viewer__book-frame::before {
    content: "";
    position: absolute;
    inset: 24px 44px 10px;
    border-radius: 28px;
    background: radial-gradient(circle at center, rgba(0, 0, 0, 0.34), rgba(0, 0, 0, 0));
    filter: blur(16px);
    pointer-events: none;
}

.mk-viewer__book {
    position: relative;
    width: var(--mk-book-max-width);
    max-width: 100%;
    margin: 0 auto;
}

.mk-viewer[data-view-mode="cover"] {
    --mk-book-shift: -25%;
}

.mk-viewer[data-view-mode="end"] {
    --mk-book-shift: 25%;
}

.mk-viewer__edge-hit {
    position: absolute;
    top: 24px;
    bottom: 24px;
    width: min(10vw, 96px);
    border: 0;
    background: transparent;
    z-index: 5;
}

.mk-viewer__edge-hit--left {
    left: 8px;
}

.mk-viewer__edge-hit--right {
    right: 8px;
}

.mk-viewer__edge-hit::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 20px;
    transition: background-color var(--transition-fast);
}

.mk-viewer__edge-hit:hover::after,
.mk-viewer__edge-hit:focus-visible::after {
    background: rgba(255, 255, 255, 0.05);
    outline: none;
}

.mk-viewer__hint {
    text-align: center;
    color: rgba(255, 255, 255, 0.52);
    font-size: 13px;
}

.mk-viewer__page {
    width: 100%;
    height: 100%;
    background: #f7f6f2;
    color: #101010;
    border-radius: 8px;
    overflow: hidden;
    box-shadow:
        0 10px 40px rgba(0, 0, 0, 0.22),
        inset 0 0 0 1px rgba(16, 16, 16, 0.06);
}

.mk-viewer__page[data-density="hard"] {
    background: linear-gradient(180deg, #f2f0ea, #ece9df);
}

.mk-viewer__page-inner {
    position: relative;
    width: 100%;
    height: 100%;
}

.mk-viewer__page-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: #f6f3eb;
}

.mk-viewer__page-placeholder {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: rgba(16, 16, 16, 0.34);
    font-size: 14px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background:
        linear-gradient(135deg, rgba(16, 16, 16, 0.03), rgba(16, 16, 16, 0.01)),
        #f6f3eb;
    transition: opacity 180ms ease;
}

.mk-viewer__page.is-loaded .mk-viewer__page-placeholder {
    opacity: 0;
    pointer-events: none;
}

.mk-viewer:fullscreen {
    width: 100%;
    height: 100%;
    padding: 24px;
    background: #0b0c10;
}

.mk-viewer:fullscreen .mk-viewer__viewport {
    min-height: calc(100vh - 120px);
}

@media (max-width: 900px) {
    .mk-case__header {
        flex-direction: column;
    }

    .mk-case__heading {
        margin-left: 0;
    }

    .mk-viewer__toolbar {
        flex-wrap: wrap;
        justify-content: center;
    }

    .mk-viewer__status {
        order: -1;
        width: 100%;
    }

    .mk-case {
        width: 100%;
    }
}

@media (max-width: 640px) {
    .mk-case {
        padding-bottom: 24px;
    }

    .mk-viewer {
        gap: 14px;
    }

    .mk-viewer__viewport {
        min-height: 44vw;
        padding: 0;
        overflow: visible;
    }

    .mk-viewer__book-frame {
        padding: 4px 0;
    }

    .mk-viewer__edge-hit {
        width: 42px;
        top: 0;
        bottom: 0;
    }

    .mk-viewer__button {
        width: 42px;
        height: 42px;
    }

    .mk-viewer__hint {
        font-size: 12px;
        max-width: 26ch;
        margin: 0 auto;
    }

    .mk-viewer[data-view-mode="cover"],
    .mk-viewer[data-view-mode="end"] {
        --mk-book-max-width: 842px;
        --mk-book-shift: -25%;
    }

    .mk-viewer[data-view-mode="end"] {
        --mk-book-shift: 25%;
    }
}