.layout {
    display: flex;
    gap: 24px;
    padding-left: 16px;
    padding-right: 16px;
    position: relative;
    align-items: flex-start;
    padding-top: 0;
    margin-top: 0;
}

.sidebar,
.toc {
    position: fixed;
    top: calc(var(--header-height-pc) + 20px);
    width: 14%;
    bottom: 20px;
    overflow-y: auto;
    z-index: 90;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) transparent;
    box-sizing: border-box;
}

.sidebar {
    left: 16px;
    padding-right: 12px;
}

.toc {
    right: 16px;
    padding-left: 12px;
}

.sidebar::-webkit-scrollbar,
.toc::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb,
.toc::-webkit-scrollbar-thumb {
    background-color: var(--accent);
    border-radius: 4px;
}

.section {
    margin-bottom: 0;
}

.menu-items,
.toc a {
    display: block;
    width: 100%;
    padding: 10px 16px;
    margin-bottom: 8px;
    border-radius: 10px;
    background: var(--accent2);
    backdrop-filter: blur(10px);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    cursor: pointer;
    box-sizing: border-box;
}

.menu-items:hover {
    border-color: color-mix(in srgb, var(--accent) 15%, transparent);
    background: color-mix(in srgb, var(--accent) 15%, var(--accent2));
    transform: translateX(6px);
}

.menu-items.active {
    background: color-mix(in srgb, var(--accent) 15%, var(--accent2));
    border-color: color-mix(in srgb, var(--accent) 15%, transparent);
    font-weight: 600;
    transform: translateX(6px);
}

.menu-items.active:hover {
    background: color-mix(in srgb, var(--accent) 30%, var(--accent2));
    border-color: color-mix(in srgb, var(--accent) 30%, transparent);
}

.toc a:hover {
    border-color: color-mix(in srgb, var(--accent) 15%, transparent);
    background: color-mix(in srgb, var(--accent) 15%, var(--accent2));
    transform: translateX(-6px);
}

.toc a.active {
    background: color-mix(in srgb, var(--accent) 15%, var(--accent2));
    border-color: color-mix(in srgb, var(--accent) 15%, transparent);
    font-weight: 600;
    transform: translateX(-6px);
}

.toc a.active:hover {
    background: color-mix(in srgb, var(--accent) 30%, var(--accent2));
    border-color: color-mix(in srgb, var(--accent) 30%, transparent);
}

.toc a.toc-subitem {
    padding-left: 24px;
    font-size: 13px;
    opacity: 0.9;
}

.main-content {
    flex: 1;
    min-width: 0;
    margin-left: calc(14% + 20px);
    margin-right: calc(14% + 20px);
    box-sizing: border-box;
    margin-bottom: 40px;
    margin-top: 0 !important;
    padding-top: 0 !important;
}

.knowledge-wrapper {
    background: var(--accent2);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 32px 32px;
    min-height: 50vh;
    margin-top: 0 !important;
}

.knowledge-wrapper > div > *:first-child {
    margin-top: 0;
}

.desktop-placeholder {
    text-align: center;
    color: var(--text2);
    margin-top: 100px;
    font-size: 18px;
}

.knowledge-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent);
    margin: 32px 0 16px 0;
    scroll-margin-top: 100px;
    padding-bottom: 8px;
    border-bottom: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
}

.knowledge-text p {
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 16px;
}

.toc-header-mobile,
.mobile-controls,
.toc-overlay {
    display: none;
}

.gallery {
    column-count: 3;
    column-gap: 12px;
    width: 100%;
    margin: 20px 0;
}

.gallery-img {
    width: 100% !important;
    height: auto;
    border-radius: 8px;
    cursor: pointer;
    transition:
        transform 0.2s,
        box-shadow 0.2s;
    border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
    margin-bottom: 12px;
    display: block;
    break-inside: avoid;
}

.gallery-img:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 2;
    position: relative;
}

.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
    opacity: 0;
    animation: fadeIn 0.3s forwards;
}

.lightbox-overlay img {
    max-width: 95%;
    max-height: 85vh;
    border-radius: 4px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.lightbox-prev,
.lightbox-next,
.lightbox-close {
    position: absolute;
    cursor: pointer;
    color: var(--text);
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
    font-size: 24px;
    user-select: none;
}

.lightbox-prev:hover,
.lightbox-next:hover,
.lightbox-close:hover {
    background: var(--accent);
    transform: scale(1.1);
}

.lightbox-close {
    top: 20px;
    right: 20px;
    font-size: 20px;
    width: 40px;
    height: 40px;
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

.wave-separator {
    width: 100%;
    height: 60px;
    margin: 40px 0;
    overflow: hidden;
}

.wave-separator svg {
    width: 100%;
    height: 100%;
    display: block;
}

.wave-separator path {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2px;
    stroke-opacity: 0.5;
    vector-effect: non-scaling-stroke;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 32px;
    padding-bottom: 16px;
}

.app-info {
    flex-wrap: wrap;
}

.app-icon {
    width: 84px;
    height: 84px;
    border-radius: 18px;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--accent2);
}

.app-details {
    flex: 1 1 auto;
    min-width: 0;
}

.app-name {
    font-size: 26px;
    font-weight: 700;
    margin: 0 0 8px 0;
    color: var(--accent);
    line-height: 1.1;
}

.app-desc {
    font-size: 15px;
    color: var(--text);
    margin: 0;
    line-height: 1.5;
    opacity: 0.9;
}

.app-downloads {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 200px;
}

.dl-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.dl-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.dl-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.dl-btn.android {
    background: rgba(61, 220, 132, 0.1);
    color: #3ddc84;
    border-color: rgba(61, 220, 132, 0.2);
}

.dl-btn.android:hover {
    background: rgba(61, 220, 132, 0.2);
}

.dl-btn.windows {
    background: rgba(0, 120, 215, 0.1);
    color: #4facfe;
    border-color: rgba(0, 120, 215, 0.2);
}

.dl-btn.windows:hover {
    background: rgba(0, 120, 215, 0.2);
}

.dl-btn.apple {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.2);
}

.dl-btn.apple:hover {
    background: rgba(255, 255, 255, 0.2);
}

.app-actions {
    flex: 0 0 100%;
    width: 100%;
    margin-top: 16px;

    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.app-actions > .instruction-trigger-btn {
    width: 100%;
    min-width: 0;
    margin: 0;
}

.app-actions > .instruction-trigger-btn:only-child {
    grid-column: 1 / -1;
}

.instruction-trigger-btn {
    flex: 1 1 auto;
    min-width: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    background: color-mix(in srgb, var(--accent) 15%, var(--accent2));
    color: var(--text);
    border: 1px solid transparent;
    border-color: color-mix(in srgb, var(--accent) 15%, transparent);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    white-space: nowrap;
}

.instruction-trigger-btn:hover {
    color: var(--text);
    background: color-mix(in srgb, var(--accent) 30%, var(--accent2));
    border-color: color-mix(in srgb, var(--accent) 30%, transparent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.instruction-trigger-btn.secondary {
    background: var(--accent2);
    color: var(--text);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}

.instruction-trigger-btn.secondary:hover {
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    color: var(--accent);
}

.inst-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    z-index: 3000;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 0;
    box-sizing: border-box;
    opacity: 0;
    animation: fadeIn 0.3s forwards;
    overflow: hidden;
}

.inst-modal {
    background: transparent;
    border: none;
    box-shadow: none;
    display: flex;
    flex-direction: column;
    gap: 0;
    align-items: flex-start;
    justify-content: center;
    max-width: 100vw;
    max-height: 100vh;
    width: 100vw;
    height: 100vh;
    border-radius: 0;
}

.inst-image-side {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1 1 auto;
    min-width: 0;
    max-height: none;
    width: 100%;
    padding: calc(env(safe-area-inset-top, 0px) + 50px) 16px 16px;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    border: none;
    overflow: hidden;
}

.inst-image-side img {
    display: block;
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    background: transparent;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    border: none;
}

.inst-content-side {
    width: 100%;
    flex: 0 0 auto;
    padding: 20px 20px calc(env(safe-area-inset-bottom, 0px) + 20px);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    border-radius: 20px 20px 0 0;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
    background: color-mix(in srgb, var(--background) 85%, transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
    max-height: 50vh;
    border-top: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
    border-left: none;
    border-right: none;
    border-bottom: none;
}

.inst-close-btn {
    position: fixed;
    top: calc(env(safe-area-inset-top, 0px) + 20px);
    right: calc(env(safe-area-inset-right, 0px) + 20px);
    left: auto;
    z-index: 3002;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
    font-size: 24px;
    color: var(--text2);
    background: rgba(0, 0, 0, 0.4);
    transition: 0.2s;
}

.inst-close-btn:hover {
    background: var(--accent);
    color: var(--text);
    transform: scale(1.1);
}

.inst-step-indicator {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.8;
    margin-bottom: 12px;
}

.inst-desc {
    width: fit-content;
    width: -moz-fit-content;
    margin: 0 auto;
    max-width: 100%;
    text-align: left;
    flex: 0 0 auto;
}

.inst-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 0;
    padding-top: 16px;
    border-top: none;
    flex-shrink: 0;
}

.inst-dots {
    display: flex;
    gap: 6px;
    max-width: 120px;
    overflow-x: auto;
    padding: 4px;
    scroll-behavior: smooth;
    scrollbar-width: none;
}

.inst-dots::-webkit-scrollbar {
    display: none;
}

.inst-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--text) 20%, transparent);
    transition: 0.3s;
    flex-shrink: 0;
}

.inst-dot.active {
    background: var(--accent);
    transform: scale(1.4);
}

.inst-btn-next {
    background: var(--accent);
    color: var(--text);
    border: none;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.inst-btn-next:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.inst-btn-prev {
    background: transparent;
    color: var(--text2);
    border: none;
    padding: 10px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
}

.inst-btn-prev:hover {
    color: var(--text);
}

.inst-btn-prev[disabled] {
    opacity: 0;
    pointer-events: none;
}

.inst-btn-next,
.inst-btn-prev {
    min-width: 140px;
    text-align: center;
}

.inst-strong {
    font-weight: 700;
    color: var(--accent);
}

.inst-copyable {
    display: inline-block;
    white-space: nowrap;
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    color: var(--accent);
    padding: 0 4px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.95em;
    cursor: pointer;
    border: 1px dashed color-mix(in srgb, var(--accent) 40%, transparent);
    transition: all 0.2s ease;
    position: relative;
    user-select: none;
    vertical-align: baseline;
}

.inst-copyable:hover {
    background: var(--accent);
    color: var(--text);
    border-color: transparent;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.inst-copyable:active {
    transform: translateY(0);
}

.inst-copyable.copied {
    background: #4caf50 !important;
    color: white !important;
    border-color: transparent;
}

.inst-copyable.copied::after {
    content: "Скопировано!";
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-family: sans-serif;
    white-space: nowrap;
    animation: fadeInOut 1s forwards;
    pointer-events: none;
}

.inst-link {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
    font-weight: 600;
    transition: all 0.2s ease;
}

.inst-link:hover {
    border-bottom-color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    border-radius: 2px;
}

@keyframes fadeInOut {
    0% {
        opacity: 0;
        transform: translate(-50%, 5px);
    }
    20% {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    80% {
        opacity: 1;
        transform: translate(-50%, 0);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -5px);
    }
}

body:has(.lightbox-overlay),
body:has(.inst-modal-overlay) {
    overflow: hidden;
    height: 100vh;
    touch-action: none;
}

@media (max-width: 900px) {
    .layout {
        display: block;
        padding: 0;
        position: relative;
    }

    .layout.mode-menu .main-content,
    .layout.mode-menu .mobile-controls,
    .layout.mode-menu .desktop-placeholder {
        display: none;
    }

    .layout.mode-menu .sidebar {
        position: relative;
        width: 100%;
        top: 0;
        left: 0;
        padding: 16px;
        padding-right: 16px;
        overflow: visible;
        margin-bottom: 40px;
    }

    .layout.mode-read .sidebar {
        display: none;
    }

    .layout.mode-read .main-content {
        margin: 0;
        padding: 0 16px;
        width: 100%;
        display: block;
    }

    .mobile-controls {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-top: 16px;
        margin-bottom: 12px;
        padding: 0 16px;
        width: 100%;
        box-sizing: border-box;
        position: relative;
        z-index: 101;
    }

    .mobile-btn {
        background: var(--accent2);
        border: 1px solid var(--accent);
        color: var(--text);
        padding: 8px 16px;
        border-radius: 8px;
        font-size: 14px;
        font-weight: 600;
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 6px;
        cursor: pointer;
    }

    .mobile-btn:active {
        background: var(--accent);
        color: var(--text);
    }

    .knowledge-wrapper {
        padding: 16px;
        border-radius: 8px;
    }

    .toc {
        position: absolute;
        top: 55px;
        right: 16px;
        left: auto;
        bottom: auto;
        height: auto;
        width: 240px;
        max-width: 70%;
        max-height: 60vh;
        display: flex;
        flex-direction: column;
        background: var(--background);
        border: 1px solid var(--accent);
        border-radius: 12px;
        padding: 0;
        z-index: 2000;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px) scale(0.95);
        transform-origin: top right;
        transition: all 0.2s cubic-bezier(0.165, 0.84, 0.44, 1);
    }

    .toc.open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0) scale(1);
    }

    .toc-header-mobile {
        display: none;
    }

    #toc-content {
        padding: 6px;
        overflow-y: auto;
    }

    .toc a {
        background: transparent;
        border: none;
        border-radius: 6px;
        margin-bottom: 2px;
        padding: 10px 12px;
        font-size: 13px;
        flex-shrink: 0;
    }

    .toc a:hover,
    .toc a.active {
        background: var(--accent2);
        color: var(--accent);
        transform: none;
        border: none;
    }

    .toc-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: transparent;
        z-index: 1999;
        display: none;
    }

    .toc-overlay.open {
        display: block;
    }

    .gallery {
        column-count: 2;
    }

    .app-actions {
        grid-template-columns: 1fr;
    }

    .app-actions > .instruction-trigger-btn {
        width: 100%;
    }

    .app-header {
        flex-direction: column;
        gap: 24px;
    }

    .app-downloads {
        width: 100%;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .dl-btn {
        width: 100%;
        justify-content: center;
        white-space: nowrap;
    }

    .app-downloads .dl-btn:only-child,
    .app-downloads .dl-btn:last-child:nth-child(odd) {
        grid-column: 1 / -1;
    }
}