@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

html {
    scroll-behavior: smooth;
}

:root {
    --color-main-background: #171717;
    --color-main-background-rgb: 23,23,23;
    --color-main-background-translucent: rgba(var(--color-main-background-rgb), .97);
    --color-main-background-blur: rgba(var(--color-main-background-rgb), .85);
    --filter-background-blur: blur(25px);
    --gradient-main-background: var(--color-main-background) 0%, var(--color-main-background-translucent) 85%, transparent 100%;
    --color-background-hover: #212121;
    --color-background-dark: #292929;
    --color-background-darker: #3b3b3b;
    --color-placeholder-light: #313131;
    --color-placeholder-dark: #4a4a4a;
    --color-main-text: #EBEBEB;
    --color-text-maxcontrast: #999999;
    --color-text-maxcontrast-default: #999999;
    --color-text-maxcontrast-background-blur: #a8a8a8;
    --color-text-error: #ff6f6f;
    --color-text-success: #49bb37;
    --color-border: #292929;
    --color-border-dark: #3b3b3b;
    --color-border-maxcontrast: #7d7d7d;
    --color-border-error: var(--color-element-error);
    --color-border-success: var(--color-element-success);
    --color-element-error: #FF5050;
    --color-element-info: #0099E0;
    --color-element-success: #40A330;
    --color-element-warning: #FFCC00;
    --color-error: #552121;
    --color-error-hover: #7a2f2f;
    --color-error-text: #FFCCCC;
    --color-warning: #3D3010;
    --color-warning-hover: #65501b;
    --color-warning-text: #FFEEC5;
    --color-success: #11321A;
    --color-success-hover: #1e582e;
    --color-success-text: #D5F2DC;
    --color-info: #003553;
    --color-info-hover: #005686;
    --color-info-text: #00AEFF;
    --color-favorite: #ffde00;
    --color-mark: #4d3800;
    --color-background-selection: rgb(from var(--color-primary-element) r g b / 0.4);
    --color-text-selection: var(--color-main-text);
    --color-loading-light: #777;
    --color-loading-dark: #CCC;
    --color-scrollbar: var(--color-border-maxcontrast) transparent;
    --color-box-shadow-rgb: 0,0,0;
    --color-box-shadow: #000000;
    --font-face: system-ui, -apple-system, "Segoe UI", Roboto, Oxygen-Sans, Cantarell, Ubuntu, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    --default-font-size: 15px;
    --font-size-small: 13px;
    --font-weight-default: 400;
    --font-weight-element: 500;
    --font-weight-heading: 600;
    --default-line-height: 1.5;
    --animation-quick: 100ms;
    --animation-slow: 200ms;
    --border-width-input: 1px;
    --border-width-input-focused: 2px;
    --border-radius-small: 4px;
    --border-radius-element: 8px;
    --border-radius-container: 12px;
    --border-radius-container-large: 16px;
    --border-radius: var(--border-radius-small);
    --border-radius-large: var(--border-radius-element);
    --border-radius-rounded: 28px;
    --border-radius-pill: 100px;
    --default-clickable-area: 34px;
    --clickable-area-large: 48px;
    --clickable-area-small: 24px;
    --default-grid-baseline: 4px;
    --header-height: 44px;
    --header-menu-item-height: 34px;
    --navigation-width: 300px;
    --navigation-entry-height: 44px;
    --sidebar-min-width: 300px;
    --sidebar-max-width: 500px;
    --breakpoint-mobile: 1024px;
    --background-invert-if-dark: invert(100%);
    --background-invert-if-bright: no;
    --primary-invert-if-bright: invert(100%);
    --primary-invert-if-dark: no;
    --color-primary: #B69720;
    --color-primary-text: #000000;
    --color-primary-hover: #967d1e;
    --color-primary-element: #B69720;
    --color-primary-element-hover: #d4b025;
    --color-primary-element-text: #000000;
    --color-primary-element-text-dark: #121212;
    --color-primary-light: #262317;
    --color-primary-light-hover: #302e22;
    --color-primary-light-text: #e1d5a5;
    --color-primary-element-light: var(--color-primary-light);
    --color-primary-element-light-text: var(--color-primary-light-text);
    --color-primary-element-light-hover: var(--color-primary-light-hover);
    --gradient-primary-background: linear-gradient(40deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    --color-background-plain: #424D05;
    --color-background-plain-text: #ffffff;
    --app-navigation-padding: calc(var(--default-grid-baseline, 4px) * 2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    min-height: 100%;
    background-color: var(--color-background-plain);
    color: var(--color-main-text);
    font-family: var(--font-face);
    font-size: var(--default-font-size);
    line-height: var(--default-line-height);
    font-weight: var(--font-weight-default);
}

/* Фоновая картинка сервера Youthcloud: сайдбар — прозрачный поверх
   .layout (rgba(23,23,23,.85) + blur), поэтому цвет панели 1:1
   совпадает с Nextcloud Talk. */
body {
    background-image: url("../img/background.jpg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}

.sidebar-toggle,
.sidebar-backdrop {
    display: none;
}

.layout {
    display: flex;
    min-height: 100vh;
    background: var(--color-main-background-blur);
    backdrop-filter: var(--filter-background-blur);
    overflow: hidden;
}

/* Nextcloud app navigation (1:1 with settings sidebar) */
.app-navigation {
    --color-text-maxcontrast: var(--color-text-maxcontrast-background-blur, var(--color-text-maxcontrast-default));
    width: var(--navigation-width);
    max-width: var(--navigation-width);
    flex-grow: 0;
    flex-shrink: 0;
    position: relative;
    top: 0;
    inset-inline-start: 0;
    align-self: stretch;
    box-sizing: border-box;
    user-select: none;
    background-color: transparent;
    border-inline-end: 1px solid var(--color-border);
}

.app-navigation__content {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.app-navigation__search {
    width: 100%;
}

.app-navigation__body {
    overflow-y: auto;
}

.app-navigation__body--no-list {
    flex: 1 1 auto;
    overflow: auto;
    height: 100%;
}

.app-navigation-list {
    position: relative;
    width: 100%;
    overflow-x: hidden;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: var(--default-grid-baseline, 4px);
    padding: calc(var(--app-navigation-padding) / 2);
    list-style: none;
}

.app-navigation-entry-wrapper {
    position: relative;
    display: flex;
    flex-shrink: 0;
    flex-wrap: wrap;
    box-sizing: border-box;
    width: 100%;
}

.app-navigation-entry {
    position: relative;
    display: flex;
    flex-shrink: 0;
    flex-wrap: wrap;
    box-sizing: border-box;
    width: 100%;
    min-height: var(--navigation-entry-height);
    transition: background-color var(--animation-quick) ease-in-out;
    border-radius: var(--border-radius-element, var(--border-radius-pill));
}

.app-navigation-entry:focus-within,
.app-navigation-entry:hover {
    background-color: color-mix(in srgb, var(--color-primary-element) 8%, transparent);
}

.app-navigation-entry.active {
    background-color: var(--color-primary-element-light);
}

.app-navigation-entry.active:hover,
.app-navigation-entry.active:focus-within {
    background-color: var(--color-primary-element-light-hover);
}

.app-navigation-entry.active::before {
    content: "";
    position: absolute;
    inset-block: calc(var(--default-grid-baseline, 4px) * 2);
    inset-inline-start: 0;
    width: 3px;
    background-color: var(--color-primary-element);
    border-radius: 999px;
    z-index: 101;
    animation: nc-nav-stripe-in var(--animation-quick, 200ms) ease-out;
}

@keyframes nc-nav-stripe-in {
    from {
        transform: scaleY(0);
        opacity: 0;
    }
    to {
        transform: scaleY(1);
        opacity: 1;
    }
}

.app-navigation-entry .app-navigation-entry-link {
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 12px;
    overflow: hidden;
    flex: 1 1 0;
    box-sizing: border-box;
    min-height: var(--navigation-entry-height);
    padding: 0;
    padding-inline-start: calc(var(--default-grid-baseline, 4px) * 2);
    padding-inline-end: calc((var(--default-clickable-area) - 16px) / 2);
    white-space: nowrap;
    color: var(--color-main-text);
    text-decoration: none;
    font-weight: var(--font-weight-element, 500);
    line-height: var(--navigation-entry-height);
}

.app-navigation-entry.active .app-navigation-entry-link {
    color: var(--color-main-text);
}

.app-navigation-entry .app-navigation-entry-link:focus-visible {
    box-shadow: 0 0 0 4px var(--color-main-background);
    outline: 2px solid var(--color-main-text);
    border-radius: var(--border-radius-element, var(--border-radius-pill));
}

.app-navigation-entry-icon {
    display: flex;
    align-items: center;
    flex: 0 0 var(--default-clickable-area);
    justify-content: center;
    width: var(--default-clickable-area);
    height: var(--default-clickable-area);
    border-radius: var(--border-radius-element);
    overflow: hidden;
}

.app-navigation-entry-icon img {
    width: 100%;
    height: 100%;
    display: block;
}

.app-navigation-entry__name {
    overflow: hidden;
    max-width: 100%;
    white-space: nowrap;
    text-overflow: ellipsis;
    font-weight: var(--font-weight-element, 500);
}

.content {
    flex: 1;
    padding: 48px 40px;
    min-width: 0;
    background: var(--color-main-background);
    animation: fadeIn 0.3s ease;
}

.app-header {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 40px;
}

.app-icon {
    width: 96px;
    height: 96px;
    border-radius: var(--border-radius-container);
    flex-shrink: 0;
}

.app-header-text {
    flex: 1;
    min-width: 0;
}

.app-header-text h1 {
    font-size: 32px;
    font-weight: var(--font-weight-heading);
    margin-bottom: 8px;
}

.app-description {
    color: var(--color-text-maxcontrast);
    font-size: var(--default-font-size);
}

.app-download {
    flex-shrink: 0;
    align-self: flex-start;
    min-width: 200px;
    padding: 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-container);
    background: rgba(255, 255, 255, 0.04);
}

.app-download h2 {
    font-size: 15px;
    font-weight: var(--font-weight-heading);
    margin-bottom: 12px;
    color: var(--color-primary-element);
}

.app-download .card-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.app-download .link {
    justify-content: flex-start;
    width: 100%;
}

.card-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: var(--default-clickable-area);
    padding: 4px 12px;
    border-radius: var(--border-radius-element);
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-main-text);
    text-decoration: none;
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-element);
    transition: background var(--animation-quick) ease, color var(--animation-quick) ease, transform var(--animation-quick) ease;
}

.link:hover {
    background: var(--color-primary-element);
    color: var(--color-primary-element-text);
    transform: translateY(-1px);
}

.link:focus-visible {
    outline: 2px solid var(--color-main-text);
    box-shadow: 0 0 0 4px var(--color-main-background);
}

.link-icon img {
    width: 16px;
    height: 16px;
    display: block;
}

.emptycontent {
    color: var(--color-text-maxcontrast);
    text-align: center;
    margin-top: 30vh;
    width: 100%;
}

.emptycontent h2 {
    font-size: 20px;
    font-weight: var(--font-weight-heading);
    margin-bottom: 10px;
}

@media (max-width: 1024px) {
    /* backdrop-filter makes .layout a stacking context and a containing block:
       the fixed sidebar (z-index 1050) ends up painted below .sidebar-backdrop
       (z-index 1040), so taps on menu entries hit the backdrop instead of the
       links. Drop the blur on mobile to let the sidebar escape the trap. */
    .layout {
        backdrop-filter: none;
        background: var(--color-main-background-translucent);
    }

    body.sidebar-open {
        overflow: hidden;
    }

    .sidebar-toggle {
        display: flex;
        position: fixed;
        top: 8px;
        left: 8px;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        border: none;
        border-radius: var(--border-radius-element);
        background: transparent;
        color: var(--color-main-text);
        opacity: 0.6;
        cursor: pointer;
        z-index: 1060;
        transition: left var(--animation-slow) ease, opacity var(--animation-quick) ease;
    }

    .sidebar-toggle:hover,
    .sidebar-toggle:focus-visible {
        opacity: 1;
    }

    .sidebar-toggle .toggle-icon {
        width: 24px;
        height: 24px;
    }

    .sidebar-toggle .toggle-icon--back {
        display: none;
    }

    body.sidebar-open .sidebar-toggle {
        left: calc(var(--navigation-width) + 8px);
    }

    body.sidebar-open .sidebar-toggle .toggle-icon--menu {
        display: none;
    }

    body.sidebar-open .sidebar-toggle .toggle-icon--back {
        display: block;
    }

    .sidebar-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: transparent;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--animation-slow) ease;
        z-index: 1040;
    }

    .app-navigation {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: var(--navigation-width);
        transform: translateX(-100%);
        transition: transform var(--animation-slow) ease;
        background-color: var(--color-main-background-blur);
        backdrop-filter: var(--filter-background-blur);
        border-inline-end: 1px solid var(--color-border);
        z-index: 1050;
        overflow-y: auto;
    }

    .app-navigation.open {
        transform: translateX(0);
    }

    body.sidebar-open .sidebar-backdrop {
        opacity: 1;
        pointer-events: auto;
    }

    .content {
        padding: 32px 20px;
    }

    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .app-download {
        width: 100%;
        min-width: 0;
    }
}