.catalog-library-shell,
.catalog-viewer-shell {
    --catalog-navy: #0f172a;
    --catalog-slate: #526277;
    --catalog-line: rgba(15, 23, 42, 0.08);
    --catalog-white: #ffffff;
    font-family: "Roboto", "Inter", sans-serif;
    color: var(--catalog-navy);
}

.catalog-library-shell,
.catalog-viewer-shell {
    display: grid;
    gap: 22px;
}

.catalog-library-kicker,
.catalog-panel-kicker,
.catalog-panel-mode {
    margin: 0 0 10px;
    color: #b45309;
    font-size: 0.74rem;
    font-weight: 900;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.catalog-library-hero,
.catalog-viewer-topbar,
.catalog-related-strip {
    border: 1px solid var(--catalog-line);
    border-radius: 28px;
    background:
        radial-gradient(circle at 85% 18%, rgba(245, 158, 11, 0.12), transparent 22%),
        linear-gradient(135deg, #ffffff 0%, #f8fafc 58%, #f8f3ea 100%);
    box-shadow: 0 20px 52px rgba(15, 23, 42, 0.08);
}

.catalog-library-hero,
.catalog-viewer-topbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 22px;
    padding: 28px;
    align-items: end;
}

.catalog-library-hero-copy,
.catalog-viewer-topbar-copy {
    max-width: 840px;
}

.catalog-library-hero h1,
.catalog-viewer-topbar h1 {
    margin: 0 0 12px;
    font-size: clamp(2.05rem, 3.8vw, 4rem);
    line-height: 0.98;
    letter-spacing: -0.06em;
}

.catalog-library-hero p,
.catalog-viewer-topbar p,
.catalog-panel-copy p,
.catalog-library-grid-head p {
    margin: 0;
    color: var(--catalog-slate);
    line-height: 1.68;
}

.catalog-library-hero-stat {
    display: grid;
    gap: 8px;
    max-width: 230px;
    padding: 18px;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.84);
    box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.04);
}

.catalog-library-hero-stat strong {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    line-height: 0.94;
    letter-spacing: -0.06em;
}

.catalog-library-featured,
.catalog-viewer-premium-shell {
    display: grid;
    gap: 16px;
    padding: 16px;
    border-radius: 32px;
    background:
        radial-gradient(circle at 12% 14%, rgba(59, 130, 246, 0.08), transparent 26%),
        radial-gradient(circle at 88% 18%, rgba(245, 158, 11, 0.1), transparent 24%),
        linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.88)),
        #ffffff;
    box-shadow: 0 28px 90px rgba(15, 23, 42, 0.12);
}

.catalog-library-featured {
    grid-template-columns: minmax(240px, 360px) minmax(0, 1fr);
    align-items: stretch;
}

.catalog-library-featured.catalog-library-featured-compact {
    grid-template-columns: minmax(180px, 280px) minmax(0, 1fr);
    gap: 18px;
    padding: 14px;
}

.catalog-library-featured-cover,
.catalog-library-cover {
    position: relative;
    display: block;
    overflow: hidden;
    text-decoration: none;
    background:
        radial-gradient(circle at 60% 20%, rgba(245, 158, 11, 0.2), transparent 20%),
        linear-gradient(180deg, #111c33 0%, #0f172a 100%);
}

.catalog-library-featured-cover {
    min-height: 100%;
    border-radius: 24px;
}

.catalog-library-featured-compact .catalog-library-featured-cover {
    min-height: 300px;
}

.catalog-library-featured-cover img,
.catalog-library-cover img,
.catalog-cover-canvas {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.catalog-library-featured-badge,
.catalog-library-card-badge {
    position: absolute;
    left: 14px;
    top: 14px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
    backdrop-filter: blur(18px);
    font-size: 0.68rem;
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.catalog-library-featured-body {
    display: grid;
    align-content: center;
    gap: 16px;
    padding: 10px 8px 10px 4px;
}

.catalog-library-featured-compact .catalog-library-featured-body {
    gap: 14px;
    padding: 8px 4px;
}

.catalog-library-featured-head,
.catalog-library-grid-head {
    display: grid;
    gap: 10px;
}

.catalog-library-featured-head h2,
.catalog-library-grid-head h2 {
    margin: 0;
    font-size: clamp(1.72rem, 2.5vw, 2.8rem);
    line-height: 1;
    letter-spacing: -0.05em;
}

.catalog-library-featured-compact .catalog-library-featured-head h2 {
    font-size: clamp(1.6rem, 2.1vw, 2.5rem);
}

.catalog-library-featured-actions,
.catalog-viewer-linkset,
.catalog-panel-actions,
.catalog-library-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.catalog-library-featured-compact .catalog-library-featured-actions .catalog-button {
    min-height: 42px;
    padding: 0 16px;
}

.catalog-library-featured-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.catalog-library-featured-meta span {
    padding: 12px 14px;
    border-radius: 16px;
    border: 1px solid var(--catalog-line);
    background: rgba(255, 255, 255, 0.78);
    color: var(--catalog-slate);
    font-size: 0.88rem;
    line-height: 1.46;
}

.catalog-library-grid-head {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
    align-items: end;
    gap: 18px;
}

.catalog-library-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.catalog-library-card {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 0;
    border: 1px solid var(--catalog-line);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.95);
    overflow: hidden;
    box-shadow: 0 14px 34px rgba(15, 23, 42, 0.06);
}

.catalog-library-cover {
    aspect-ratio: auto;
    min-height: 100%;
}

.catalog-library-body {
    display: grid;
    gap: 12px;
    padding: 16px 16px 16px 14px;
}

.catalog-library-body-copy {
    display: grid;
    gap: 7px;
}

.catalog-library-body h3,
.catalog-related-head h2 {
    margin: 0;
    font-size: clamp(1.12rem, 1.45vw, 1.38rem);
    line-height: 1.12;
    letter-spacing: -0.04em;
}

.catalog-library-body p,
.catalog-related-card small {
    margin: 0;
    color: var(--catalog-slate);
    font-size: 0.92rem;
    line-height: 1.56;
}

.catalog-viewer-stage {
    display: grid;
}

.catalog-viewer-premium-shell {
    grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.64fr);
    height: min(84vh, 860px);
    min-height: min(84vh, 860px);
    align-items: stretch;
    overflow: hidden;
}

body.catalog-immersive-active {
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: manipulation;
}

body.catalog-immersive-active .site-header,
body.catalog-immersive-active .footer-shell,
body.catalog-immersive-active .catalog-viewer-topbar,
body.catalog-immersive-active .catalog-related-strip {
    display: none !important;
}

body.catalog-immersive-active .page-shell {
    padding-top: 0 !important;
}

.catalog-viewer-premium-shell.is-immersive-active {
    position: fixed;
    inset: 0;
    z-index: 9999;
    width: 100vw;
    width: 100dvw;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    padding: max(10px, env(safe-area-inset-top, 0px)) max(10px, env(safe-area-inset-right, 0px)) max(10px, env(safe-area-inset-bottom, 0px)) max(10px, env(safe-area-inset-left, 0px));
    border-radius: 0;
    background: #0b1322;
    box-shadow: none;
}

.catalog-viewer-premium-shell.is-immersive-active .catalog-viewer-showcase {
    border-radius: 26px;
}

.catalog-viewer-showcase {
    position: relative;
    display: grid;
    min-height: 0;
    overflow: hidden;
    border-radius: 28px;
    background:
        radial-gradient(circle at 72% 22%, rgba(245, 158, 11, 0.16), transparent 24%),
        radial-gradient(circle at 20% 82%, rgba(59, 130, 246, 0.14), transparent 28%),
        linear-gradient(180deg, #0f172a 0%, #111c33 100%);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.08),
        inset 0 26px 90px rgba(255, 255, 255, 0.04);
}

.catalog-viewer-showcase::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 34%;
    background: linear-gradient(180deg, rgba(8, 15, 31, 0), rgba(8, 15, 31, 0.92));
    pointer-events: none;
}

.catalog-viewer-stage.is-awaiting-launch .catalog-viewer-showcase::before {
    content: "E-Gezinti hazır, dokununca tam ekran ve müzik başlar";
    position: absolute;
    left: 20px;
    top: 76px;
    z-index: 5;
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.22);
    backdrop-filter: blur(16px);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.catalog-viewer-chrome {
    position: absolute;
    inset: 16px 16px auto 16px;
    z-index: 4;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto auto;
    gap: 10px;
    align-items: center;
}

.catalog-sound-toggle,
.catalog-close-button,
.catalog-nav,
.catalog-panel-page-pill {
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.12);
    color: #ffffff;
    box-shadow: 0 12px 26px rgba(15, 23, 42, 0.18);
    backdrop-filter: blur(18px);
}

.catalog-sound-toggle,
.catalog-close-button {
    min-height: 42px;
    font: inherit;
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.catalog-sound-toggle {
    min-width: 128px;
    padding: 0 14px;
}

.catalog-sound-toggle.is-active,
.catalog-button.is-primary,
.catalog-panel-actions .catalog-button.is-primary {
    box-shadow:
        0 18px 36px rgba(245, 158, 11, 0.22),
        inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.catalog-close-button {
    width: 42px;
    height: 42px;
    padding: 0;
    cursor: pointer;
}

.catalog-top-progress {
    display: flex;
    gap: 7px;
    min-width: 0;
}

.catalog-top-progress span {
    position: relative;
    overflow: hidden;
    height: 4px;
    flex: 1;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
}

.catalog-top-progress span::after {
    content: "";
    position: absolute;
    inset: 0;
    transform: scaleX(0);
    transform-origin: left center;
    background: linear-gradient(90deg, #fbbf24, #ffffff);
}

.catalog-top-progress span.is-complete::after,
.catalog-top-progress span.is-current::after {
    transform: scaleX(1);
}

.catalog-top-progress span.is-current::after {
    animation: catalogProgressFill linear forwards;
    animation-duration: var(--catalog-progress-duration, 4.2s);
}

.catalog-stage-counter,
.catalog-panel-page-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 14px;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.catalog-viewer-panel .catalog-panel-page-pill {
    border-color: rgba(15, 23, 42, 0.08);
    background: rgba(15, 23, 42, 0.06);
    color: var(--catalog-navy);
    box-shadow: none;
}

.catalog-viewer-book {
    position: relative;
    min-height: 0;
    padding: 24px 24px 146px;
}

.catalog-viewer-book:focus {
    outline: 2px solid rgba(251, 191, 36, 0.36);
    outline-offset: 6px;
}

.catalog-viewer-surface {
    position: relative;
    display: grid;
    align-items: center;
    justify-items: center;
    min-height: 100%;
    overflow: hidden;
    isolation: isolate;
    border-radius: 24px;
}

.catalog-stage-glow {
    position: absolute;
    inset: 12% 18% auto;
    height: 32%;
    border-radius: 999px;
    background: rgba(245, 158, 11, 0.18);
    filter: blur(80px);
    pointer-events: none;
}

.catalog-page-frame {
    display: grid;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 100%;
    max-height: 100%;
    overflow: hidden;
}

.catalog-page-frame.desktop-frame {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.catalog-page-frame.mobile-frame {
    display: none;
}

.catalog-page-canvas {
    position: relative;
    z-index: 2;
    max-width: 100%;
    max-height: 100%;
    margin: 0 auto;
    border-radius: 18px;
    background: #ffffff;
    box-shadow:
        0 24px 70px rgba(15, 23, 42, 0.22),
        0 0 0 1px rgba(255, 255, 255, 0.72);
}

.catalog-viewer-surface.page-shift .catalog-page-canvas {
    animation: catalogPageShift 320ms ease;
}

.catalog-loading-state {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: rgba(255, 255, 255, 0.84);
    font-weight: 700;
    letter-spacing: 0.04em;
}

.catalog-viewer-surface:not(.is-loading) .catalog-loading-state {
    display: none;
}

.catalog-scene-caption {
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: 20px;
    z-index: 5;
    display: grid;
    gap: 8px;
    max-width: 460px;
    padding: 16px 18px;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(8, 15, 31, 0.22), rgba(8, 15, 31, 0.72));
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
}

.catalog-scene-step {
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.catalog-scene-caption h2 {
    margin: 0;
    color: #ffffff !important;
    text-shadow: 0 12px 24px rgba(0, 0, 0, 0.32);
    font-size: clamp(1.56rem, 2.6vw, 2.5rem);
    line-height: 1.02;
    letter-spacing: -0.05em;
}

.catalog-scene-caption p {
    color: rgba(255, 255, 255, 0.84) !important;
    font-size: 0.92rem;
    line-height: 1.56;
}

.catalog-nav {
    position: absolute;
    top: 50%;
    z-index: 4;
    width: 46px;
    height: 46px;
    padding: 0;
    transform: translateY(-50%);
    font-size: 1.6rem;
    font-weight: 700;
    cursor: pointer;
}

.catalog-nav.prev {
    left: 18px;
}

.catalog-nav.next {
    right: 18px;
}

.catalog-viewer-panel {
    display: grid;
    grid-template-rows: auto auto auto auto minmax(0, 1fr);
    gap: 14px;
    min-height: 0;
    height: 100%;
    overflow: hidden;
    padding: 18px 14px 14px 8px;
    border-radius: 26px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(248, 250, 252, 0.94)),
        #ffffff;
    box-shadow:
        inset 0 0 0 1px rgba(15, 23, 42, 0.05),
        inset 0 18px 56px rgba(245, 158, 11, 0.04);
}

.catalog-panel-head,
.catalog-panel-copy {
    display: grid;
    gap: 8px;
}

.catalog-panel-head {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
}

.catalog-panel-head h2 {
    margin: 0;
    color: var(--catalog-navy);
    font-size: clamp(1.36rem, 1.9vw, 2rem);
    line-height: 1.02;
    letter-spacing: -0.05em;
}

.catalog-panel-copy strong {
    color: var(--catalog-navy);
    font-size: 0.9rem;
}

.catalog-page-rail-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    color: #334155;
    font-weight: 800;
}

.catalog-page-rail-head small {
    color: #64748b;
    font-size: 0.74rem;
}

.catalog-page-rail {
    display: grid;
    gap: 8px;
    min-height: 0;
    overflow: auto;
    padding-right: 6px;
}

.catalog-rail-card {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 9px;
    align-items: center;
    padding: 7px;
    border-radius: 16px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    background: rgba(255, 255, 255, 0.78);
    text-align: left;
    cursor: pointer;
    transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.catalog-rail-card:hover,
.catalog-rail-card.is-active {
    transform: translateX(4px);
    border-color: rgba(245, 158, 11, 0.28);
    box-shadow:
        0 18px 38px rgba(15, 23, 42, 0.08),
        0 0 0 1px rgba(251, 191, 36, 0.16);
}

.catalog-rail-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 0.76;
    border-radius: 10px;
    background: linear-gradient(180deg, #edf2f7, #e2e8f0);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.72);
}

.catalog-rail-thumb canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.catalog-rail-index {
    position: absolute;
    left: 7px;
    top: 7px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 28px;
    padding: 0 8px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.92);
    color: #ffffff;
    font-size: 0.68rem;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.catalog-rail-copy {
    display: grid;
    gap: 4px;
}

.catalog-rail-copy strong,
.catalog-related-card span {
    color: var(--catalog-navy);
    font-size: 0.82rem;
    line-height: 1.2;
}

.catalog-rail-copy span {
    color: #64748b;
    font-size: 0.7rem;
}

.catalog-related-strip {
    padding: 24px;
}

.catalog-related-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.catalog-related-card {
    display: grid;
    gap: 6px;
    padding: 16px;
    border-radius: 16px;
    text-decoration: none;
    color: var(--catalog-navy);
    border: 1px solid var(--catalog-line);
    background: rgba(255, 255, 255, 0.82);
}

@keyframes catalogPageShift {
    from {
        opacity: 0.42;
        transform: translateY(10px) scale(0.992);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes catalogProgressFill {
    from {
        transform: scaleX(0);
    }

    to {
        transform: scaleX(1);
    }
}

@media (max-width: 1180px) {
    .catalog-library-featured,
    .catalog-viewer-premium-shell {
        grid-template-columns: 1fr;
    }

    .catalog-viewer-premium-shell:not(.is-immersive-active) {
        height: auto;
        min-height: auto;
    }

    .catalog-library-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .catalog-library-grid-head {
        grid-template-columns: 1fr;
    }

    .catalog-library-featured-meta {
        grid-template-columns: 1fr;
    }

    .catalog-viewer-panel {
        grid-template-rows: auto auto auto auto minmax(220px, auto);
        height: auto;
    }

    .catalog-page-rail {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        overflow: visible;
    }

    .catalog-rail-card {
        grid-template-columns: 72px minmax(0, 1fr);
    }
}

@media (max-width: 900px) {
    .catalog-library-hero,
    .catalog-viewer-topbar,
    .catalog-related-strip {
        padding: 22px;
        border-radius: 24px;
    }

    .catalog-library-hero,
    .catalog-viewer-topbar {
        grid-template-columns: 1fr;
    }

    .catalog-library-featured,
    .catalog-library-featured.catalog-library-featured-compact {
        padding: 14px;
        border-radius: 28px;
    }

    .catalog-library-featured.catalog-library-featured-compact {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .catalog-library-featured-compact .catalog-library-featured-cover {
        min-height: 220px;
    }

    .catalog-library-featured-body {
        gap: 16px;
        padding: 10px 6px 6px;
    }

    .catalog-library-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
    }

    .catalog-library-card {
        grid-template-columns: 112px minmax(0, 1fr);
    }

    .catalog-library-cover {
        aspect-ratio: auto;
    }

    .catalog-library-body {
        padding: 14px;
    }

    .catalog-library-actions {
        gap: 10px;
    }

    .catalog-library-actions .catalog-button {
        flex: 1 1 0;
        justify-content: center;
    }

    .catalog-viewer-premium-shell:not(.is-immersive-active) {
        min-height: 100vh;
        padding: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }

    .catalog-viewer-premium-shell:not(.is-immersive-active) .catalog-viewer-showcase {
        min-height: 100vh;
        border-radius: 0;
    }

    .catalog-viewer-premium-shell.is-immersive-active {
        grid-template-columns: 1fr;
        padding: 0;
        background: #0b1322;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-viewer-showcase {
        min-height: 100dvh;
        border-radius: 0;
    }

    .catalog-viewer-book {
        padding: 86px 14px 228px;
    }

    .catalog-viewer-stage.is-awaiting-launch .catalog-viewer-showcase::before {
        left: 14px;
        right: 14px;
        top: 74px;
        justify-content: center;
        min-height: 38px;
        padding: 0 14px;
        font-size: 0.62rem;
        text-align: center;
    }

    .catalog-page-frame.desktop-frame {
        display: none;
    }

    .catalog-page-frame.mobile-frame {
        display: grid;
    }

    .catalog-viewer-panel {
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 6;
        grid-template-rows: auto auto auto minmax(0, 120px);
        gap: 12px;
        padding: 16px 16px calc(12px + env(safe-area-inset-bottom));
        border-radius: 28px 28px 0 0;
        background: linear-gradient(180deg, rgba(15, 23, 42, 0), rgba(15, 23, 42, 0.22) 14%, rgba(15, 23, 42, 0.92) 34%, rgba(15, 23, 42, 0.98) 100%);
        box-shadow: none;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-viewer-panel {
        max-height: min(34dvh, 280px);
        overflow: hidden;
    }

    .catalog-panel-head h2,
    .catalog-panel-copy strong,
    .catalog-panel-copy p,
    .catalog-page-rail-head,
    .catalog-page-rail-head small,
    .catalog-panel-page-pill,
    .catalog-rail-copy strong,
    .catalog-rail-copy span {
        color: #ffffff;
    }

    .catalog-panel-page-pill {
        background: rgba(255, 255, 255, 0.1);
    }

    .catalog-page-rail {
        display: flex;
        gap: 10px;
        overflow-x: auto;
        overflow-y: hidden;
        padding-bottom: 2px;
    }

    .catalog-rail-card {
        min-width: 186px;
        background: rgba(255, 255, 255, 0.12);
        border-color: rgba(255, 255, 255, 0.1);
    }

    .catalog-top-progress {
        grid-column: 1 / -1;
        order: 4;
    }

    .catalog-stage-counter {
        justify-self: end;
    }

    .catalog-scene-caption {
        left: 14px;
        right: 14px;
        bottom: 176px;
        max-width: none;
        padding: 14px 16px;
    }
}

@media (max-width: 640px) {
    .catalog-library-shell,
    .catalog-viewer-shell {
        gap: 18px;
    }

    .catalog-library-hero h1,
    .catalog-viewer-topbar h1 {
        font-size: clamp(1.78rem, 8.2vw, 2.5rem);
    }

    .catalog-library-featured-head h2,
    .catalog-library-grid-head h2 {
        font-size: clamp(1.42rem, 7vw, 1.9rem);
    }

    .catalog-library-grid {
        grid-template-columns: 1fr;
    }

    .catalog-library-card {
        grid-template-columns: 96px minmax(0, 1fr);
        align-items: stretch;
    }

    .catalog-library-cover {
        aspect-ratio: auto;
        min-height: 100%;
    }

    .catalog-library-body {
        padding: 14px 14px 14px 12px;
    }

    .catalog-library-body h3 {
        font-size: 1.02rem;
    }

    .catalog-library-body p {
        font-size: 0.84rem;
        line-height: 1.5;
    }

    .catalog-library-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .catalog-viewer-chrome {
        inset: 14px 14px auto 14px;
        grid-template-columns: auto auto auto;
    }

    .catalog-sound-toggle {
        min-width: 118px;
        padding: 0 14px;
        font-size: 0.66rem;
    }

    .catalog-stage-counter,
    .catalog-panel-page-pill {
        min-height: 38px;
        padding: 0 12px;
        font-size: 0.68rem;
    }

    .catalog-close-button,
    .catalog-nav {
        width: 40px;
        height: 40px;
    }

    .catalog-nav.prev {
        left: 14px;
    }

    .catalog-nav.next {
        right: 14px;
    }

    .catalog-viewer-book {
        padding: 82px 10px 220px;
    }

    .catalog-scene-caption {
        bottom: 170px;
        gap: 6px;
        padding: 12px 14px;
    }

    .catalog-scene-caption h2 {
        display: none;
    }

    .catalog-scene-caption p {
        font-size: 0.78rem;
        line-height: 1.45;
    }

    .catalog-panel-head h2 {
        font-size: clamp(1.28rem, 6vw, 1.7rem);
    }

    .catalog-viewer-panel {
        grid-template-rows: auto auto auto minmax(0, 124px);
        padding: 14px 14px calc(14px + env(safe-area-inset-bottom));
    }

    .catalog-panel-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .catalog-panel-actions .catalog-button {
        min-height: 40px;
        padding: 0 12px;
        font-size: 0.72rem;
    }

    .catalog-rail-card {
        min-width: 156px;
        grid-template-columns: 58px minmax(0, 1fr);
        padding: 7px;
    }

    .catalog-rail-copy strong {
        font-size: 0.8rem;
    }

    .catalog-rail-copy span {
        font-size: 0.7rem;
    }
}

/* Fullscreen mobile refinement for /katalog immersive launch */
.catalog-viewer-premium-shell:fullscreen,
.catalog-viewer-premium-shell:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    padding: 0;
    border-radius: 0;
    background: #0f172a;
}

.catalog-viewer-premium-shell:fullscreen .catalog-viewer-showcase,
.catalog-viewer-premium-shell:-webkit-full-screen .catalog-viewer-showcase {
    min-height: 100vh;
    border-radius: 0;
}

@media (max-width: 900px) {
    .catalog-viewer-premium-shell {
        min-height: 100svh;
    }

    .catalog-viewer-book {
        padding: 68px 14px 118px;
    }

    .catalog-page-canvas.mobile {
        max-width: min(78vw, 330px);
        max-height: 56vh;
        border-radius: 20px;
    }

    .catalog-scene-caption {
        left: 22px;
        right: 22px;
        bottom: 144px;
        max-width: 280px;
        gap: 6px;
        padding: 10px 12px;
        border-radius: 18px;
        background: linear-gradient(180deg, rgba(8, 15, 31, 0.18), rgba(8, 15, 31, 0.66));
    }

    .catalog-scene-caption h2 {
        font-size: clamp(0.98rem, 4vw, 1.34rem);
        line-height: 1.04;
        letter-spacing: -0.03em;
    }

    .catalog-scene-caption p {
        font-size: 0.68rem;
        line-height: 1.42;
    }

    .catalog-nav {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }

    .catalog-nav.prev {
        left: 12px;
    }

    .catalog-nav.next {
        right: 12px;
    }

    .catalog-viewer-panel {
        grid-template-rows: auto auto auto minmax(0, 108px);
        gap: 10px;
        padding: 12px 14px calc(10px + env(safe-area-inset-bottom));
        border-radius: 22px 22px 0 0;
    }

    .catalog-panel-head h2 {
        font-size: clamp(0.98rem, 3.8vw, 1.22rem);
        line-height: 1.08;
    }

    .catalog-panel-copy strong {
        font-size: 0.78rem;
    }

    .catalog-panel-copy p {
        font-size: 0.7rem;
        line-height: 1.4;
    }

    .catalog-panel-actions .catalog-button {
        min-height: 36px;
        padding: 0 10px;
        font-size: 0.68rem;
    }

    .catalog-page-rail {
        gap: 8px;
        padding-bottom: 0;
        grid-auto-columns: minmax(126px, 1fr);
    }

    .catalog-rail-card {
        min-width: 126px;
        grid-template-columns: 42px minmax(0, 1fr);
        gap: 7px;
        padding: 6px;
        border-radius: 12px;
    }

    .catalog-rail-thumb {
        border-radius: 8px;
    }

    .catalog-rail-index {
        min-width: 22px;
        height: 22px;
        font-size: 0.58rem;
    }

    .catalog-rail-copy strong {
        font-size: 0.72rem;
        line-height: 1.16;
    }

    .catalog-rail-copy span {
        font-size: 0.62rem;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-viewer-book {
        padding: 66px 12px 104px;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-page-canvas.mobile {
        max-width: min(82vw, 348px);
        max-height: 60vh;
        border-radius: 20px;
        box-shadow: 0 24px 56px rgba(7, 20, 54, 0.22);
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-scene-caption,
    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-copy,
    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-head h2,
    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-kicker,
    .catalog-viewer-premium-shell.is-immersive-active .catalog-page-rail-head span,
    .catalog-viewer-premium-shell.is-immersive-active .catalog-page-rail-head small,
    .catalog-viewer-premium-shell.is-immersive-active .catalog-rail-copy span {
        display: none;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-viewer-panel {
        grid-template-rows: auto auto minmax(0, 74px);
        gap: 8px;
        max-height: 138px;
        padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
        border-radius: 18px 18px 0 0;
        background: linear-gradient(180deg, rgba(9, 17, 31, 0.22), rgba(9, 17, 31, 0.86) 28%, rgba(9, 17, 31, 0.96) 100%);
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-head {
        grid-template-columns: 1fr auto;
        align-items: center;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-page-pill {
        min-height: 30px;
        padding: 0 10px;
        border-color: rgba(255, 255, 255, 0.12);
        background: rgba(255, 255, 255, 0.08);
        color: #ffffff;
        font-size: 0.58rem;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-actions {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-actions .catalog-button {
        min-height: 34px;
        padding: 0 10px;
        font-size: 0.62rem;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-page-rail {
        gap: 6px;
        overflow-x: auto;
        overflow-y: hidden;
        padding-bottom: 0;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-rail-card {
        min-width: 88px;
        grid-template-columns: 28px minmax(0, 1fr);
        gap: 5px;
        padding: 4px;
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.1);
        border-color: rgba(255, 255, 255, 0.08);
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-rail-thumb {
        border-radius: 6px;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-rail-index {
        min-width: 18px;
        height: 18px;
        font-size: 0.5rem;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-rail-copy strong {
        font-size: 0.58rem;
        line-height: 1.05;
        color: #ffffff;
    }
}

@media (max-width: 640px) {
    .catalog-viewer-book {
        padding: 66px 10px 108px;
    }

    .catalog-page-canvas.mobile {
        max-width: min(82vw, 326px);
        max-height: 58vh;
        border-radius: 18px;
    }

    .catalog-viewer-stage.is-awaiting-launch .catalog-viewer-showcase::before {
        left: 12px;
        right: 12px;
        top: 68px;
        min-height: 34px;
        padding: 0 12px;
        font-size: 0.56rem;
    }

    .catalog-viewer-chrome {
        inset: 10px 10px auto 10px;
        gap: 8px;
    }

    .catalog-sound-toggle {
        min-width: 98px;
        min-height: 34px;
        padding: 0 10px;
        font-size: 0.56rem;
    }

    .catalog-stage-counter,
    .catalog-panel-page-pill {
        min-height: 34px;
        padding: 0 10px;
        font-size: 0.6rem;
    }

    .catalog-close-button {
        width: 34px;
        height: 34px;
        min-height: 34px;
    }

    .catalog-nav {
        width: 32px;
        height: 32px;
        bottom: auto;
        top: 46%;
    }

    .catalog-viewer-panel {
        grid-template-rows: auto auto auto minmax(0, 82px);
        gap: 8px;
        padding: 10px 12px calc(8px + env(safe-area-inset-bottom));
    }

    .catalog-panel-actions {
        gap: 6px;
    }

    .catalog-panel-actions .catalog-button {
        min-height: 34px;
        font-size: 0.62rem;
    }

    .catalog-rail-card {
        min-width: 110px;
        grid-template-columns: 36px minmax(0, 1fr);
        padding: 5px;
    }

    .catalog-rail-copy strong {
        font-size: 0.66rem;
    }

    .catalog-rail-copy span {
        font-size: 0.58rem;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-viewer-book {
        padding: 64px 8px 98px;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-page-canvas.mobile {
        max-width: min(84vw, 330px);
        max-height: 60vh;
        border-radius: 18px;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-viewer-panel {
        grid-template-rows: auto auto minmax(0, 64px);
        max-height: 120px;
        padding: 8px 10px calc(8px + env(safe-area-inset-bottom));
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-panel-actions .catalog-button {
        min-height: 32px;
        font-size: 0.58rem;
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-rail-card {
        min-width: 78px;
        grid-template-columns: 24px minmax(0, 1fr);
    }

    .catalog-viewer-premium-shell.is-immersive-active .catalog-rail-copy strong {
        font-size: 0.54rem;
    }
}