:root {
    --shell-navy: #12344f;
    --shell-navy-deep: #081926;
    --shell-cream: #f7f1e8;
    --shell-panel: #fffaf3;
    --shell-line: #dccdbc;
    --shell-accent: #c98a2a;
    --shell-accent-2: #6eb3ff;
    --shell-shadow: 0 18px 42px rgba(19, 35, 49, 0.12);
    --sidebar-width: 292px;
    --sidebar-collapsed-width: 84px;
    --shell-scrollbar-track: rgba(18, 52, 79, 0.08);
    --shell-scrollbar-thumb: rgba(18, 52, 79, 0.44);
    --shell-scrollbar-thumb-strong: rgba(18, 52, 79, 0.66);
    --shell-scrollbar-thumb-border: rgba(255, 255, 255, 0.84);
}

html.theme-dark {
    --shell-navy: #ecf4ff;
    --shell-navy-deep: #dcecff;
    --shell-cream: #121922;
    --shell-panel: #172230;
    --shell-line: rgba(191, 214, 235, 0.16);
    --shell-accent: #3c7099;
    --shell-accent-2: #9cc7ff;
    --shell-shadow: 0 18px 42px rgba(0, 0, 0, 0.28);
    --shell-scrollbar-track: rgba(191, 214, 235, 0.08);
    --shell-scrollbar-thumb: rgba(108, 156, 204, 0.52);
    --shell-scrollbar-thumb-strong: rgba(108, 156, 204, 0.78);
    --shell-scrollbar-thumb-border: rgba(17, 26, 36, 0.88);
}

* {
    scrollbar-width: thin;
    scrollbar-color: var(--shell-scrollbar-thumb) var(--shell-scrollbar-track);
}

*::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

*::-webkit-scrollbar-track {
    background: var(--shell-scrollbar-track);
    border-radius: 999px;
}

*::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--shell-scrollbar-thumb), var(--shell-scrollbar-thumb-strong));
    border: 3px solid var(--shell-scrollbar-thumb-border);
    border-radius: 999px;
    min-height: 44px;
}

*::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--shell-scrollbar-thumb-strong), var(--shell-scrollbar-thumb-strong));
}

*::-webkit-scrollbar-corner {
    background: transparent;
}

body.shell-enabled {
    min-height: 100vh;
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(11, 27, 39, 0.42);
    backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 180ms ease;
    z-index: 45;
}

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

.app-shell {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    min-height: 100vh;
}

body.sidebar-collapsed .app-shell {
    grid-template-columns: var(--sidebar-collapsed-width) minmax(0, 1fr);
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: auto;
    padding: 22px 18px;
    background:
        radial-gradient(circle at top, rgba(201, 138, 42, 0.12), transparent 24%),
        linear-gradient(180deg, rgba(13, 40, 61, 0.98), rgba(8, 25, 38, 0.98));
    color: #eef6fb;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

html.theme-dark .sidebar {
    background:
        radial-gradient(circle at top, rgba(108, 156, 204, 0.12), transparent 24%),
        linear-gradient(180deg, rgba(7, 13, 20, 0.98), rgba(10, 18, 27, 0.98));
}

.sidebar-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    text-decoration: none;
    color: inherit;
    font-size: 1.9rem;
    font-weight: 800;
    letter-spacing: 0.03em;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff2d8;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.12);
    flex: 0 0 42px;
}

.brand-label {
    min-width: 0;
    display: inline-block;
}

.brand-label strong {
    display: block;
    font-size: 16px;
    letter-spacing: 0.01em;
}

.brand-subtitle {
    display: block;
    margin-top: 6px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.82rem;
    line-height: 1.3;
}

.sidebar-actions {
    margin-left: auto;
    display: flex;
    gap: 8px;
}

.sidebar-control {
    border: 0;
    background: rgba(255,255,255,0.08);
    color: #eef6fb;
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.sidebar-control svg {
    width: 18px;
    height: 18px;
    display: block;
}

.sidebar-pin-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.sidebar-pin-expand {
    display: none;
}

.sidebar-control:hover {
    background: rgba(255,255,255,0.14);
}

.sidebar-nav {
    display: grid;
    gap: 18px;
    overflow-y: auto;
    padding-right: 4px;
}

.sidebar-nav::-webkit-scrollbar {
    width: 10px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.06);
}

.sidebar-nav::-webkit-scrollbar-thumb {
    border-width: 2px;
}

.nav-card {
    margin-top: 4px;
    padding: 14px;
    border-radius: 22px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    display: grid;
    gap: 10px;
}

.nav-card h3 {
    margin: 0 0 14px;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.68);
}

.nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 6px;
}

.sidebar-link,
.session-chip,
.button-full,
.install-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 42px;
    border-radius: 14px;
    padding: 10px 12px;
    color: rgba(255, 255, 255, 0.92);
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
    font-weight: 600;
    transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.sidebar-link:hover,
.session-chip:hover,
.button-full:hover,
.install-trigger:hover {
    background: rgba(110, 179, 255, 0.18);
    border-color: rgba(172,214,255,0.12);
    color: #ffffff;
    transform: translateY(-1px);
}

.sidebar-link.is-active {
    background: linear-gradient(135deg, rgba(121, 186, 255, 0.36), rgba(85, 151, 225, 0.2));
    border-color: rgba(172, 214, 255, 0.3);
    box-shadow: inset 0 0 0 1px rgba(172, 214, 255, 0.3);
}

.ui-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    flex: 0 0 20px;
}

.ui-icon svg {
    width: 20px;
    height: 20px;
    display: block;
}

.link-copy {
    min-width: 0;
    display: grid;
    gap: 0;
}

.link-copy strong,
.session-chip strong {
    font-size: 14px;
    line-height: 1.2;
}

.link-copy span,
.session-chip small {
    color: rgba(255, 255, 255, 0.76);
    font-size: 11px;
    line-height: 1.25;
}

.session-chip {
    align-items: flex-start;
    cursor: default;
    margin-bottom: 6px;
    background: rgba(255,255,255,0.05);
}

.button-full,
.install-trigger {
    justify-content: center;
    font-weight: 700;
    cursor: pointer;
}

.install-trigger[hidden] {
    display: none;
}

.sidebar-foot {
    margin-top: auto;
    display: grid;
    gap: 12px;
}

.sidebar-copy {
    margin: 0 0 14px;
    color: rgba(255, 255, 255, 0.76);
    font-size: 11px;
    line-height: 1.35;
    padding: 0 4px;
}

.content-shell {
    min-width: 0;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(248, 243, 236, 0.84);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(220, 205, 188, 0.72);
}

.header-start,
.header-end {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-title {
    display: grid;
    gap: 3px;
}

.header-title strong {
    font-size: 16px;
}

.header-title span {
    color: #6d6258;
    font-size: 12px;
}

.header-chip,
.header-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    padding: 10px 14px;
    border-radius: 999px;
    border: 1px solid rgba(220, 205, 188, 0.8);
    background: rgba(255,255,255,0.72);
    color: #1f1b18;
    text-decoration: none;
    font-size: 13px;
}

.header-link {
    cursor: pointer;
}

button.header-link {
    border: 1px solid rgba(220, 205, 188, 0.8);
}

.header-link[hidden] {
    display: none;
}

.header-toggle .ui-icon svg,
.sidebar-collapse .ui-icon svg,
.sidebar-close .ui-icon svg {
    width: 18px;
    height: 18px;
}

.theme-toggle .theme-icon-sun {
    display: none;
}

html.theme-dark .theme-toggle .theme-icon-moon {
    display: none;
}

html.theme-dark .theme-toggle .theme-icon-sun {
    display: inline-flex;
}

.user-menu {
    position: relative;
}

.user-menu-trigger {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    border-radius: 16px;
    border: 1px solid rgba(220, 205, 188, 0.82);
    background: rgba(255,255,255,0.82);
    color: #1f1b18;
    cursor: pointer;
    box-shadow: 0 10px 24px rgba(19, 35, 49, 0.08);
}

.user-menu-trigger:hover {
    background: #fff;
}

.user-menu-avatar,
.user-menu-summary-avatar {
    width: 38px;
    height: 38px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #3d6f99, #193a57);
    color: #fff;
    font-weight: 800;
    font-size: 14px;
    flex: 0 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
}

.user-menu-copy {
    min-width: 0;
    display: grid;
    gap: 2px;
    text-align: left;
}

.user-menu-copy strong,
.user-menu-summary strong {
    display: block;
    color: #1f1b18;
    font-size: 14px;
    line-height: 1.15;
}

.user-menu-copy small,
.user-menu-summary small {
    display: block;
    color: #6d6258;
    font-size: 12px;
    line-height: 1.35;
}

.user-menu-caret {
    color: #6d6258;
    font-size: 12px;
}

.user-menu-panel {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: min(320px, calc(100vw - 28px));
    padding: 12px;
    border-radius: 22px;
    border: 1px solid rgba(220, 205, 188, 0.94);
    background: rgba(255,250,243,0.98);
    box-shadow: 0 22px 42px rgba(19, 35, 49, 0.16);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 160ms ease, transform 160ms ease;
    z-index: 120;
}

html.theme-dark .app-header {
    background: rgba(16, 24, 34, 0.84);
    border-bottom-color: rgba(191, 214, 235, 0.12);
}

html.theme-dark .header-title strong,
html.theme-dark .header-title span,
html.theme-dark .header-chip,
html.theme-dark .header-link {
    color: #e8eef6;
}

html.theme-dark .header-chip,
html.theme-dark .header-link {
    background: rgba(20, 30, 41, 0.9);
    border-color: rgba(191, 214, 235, 0.16);
}

html.theme-dark .sidebar .sidebar-control {
    background: rgba(29, 45, 62, 0.92);
    border: 1px solid rgba(191, 214, 235, 0.14);
    color: #e8eef6;
    box-shadow: none;
}

html.theme-dark .sidebar .sidebar-control:hover {
    background: rgba(52, 85, 117, 0.92);
    border-color: rgba(156, 199, 235, 0.28);
}

html.theme-dark .user-menu-trigger {
    background: rgba(20, 30, 41, 0.92);
    border-color: rgba(191, 214, 235, 0.18);
    color: #e8eef6;
}

html.theme-dark .user-menu-avatar,
html.theme-dark .user-menu-summary-avatar {
    background: linear-gradient(135deg, #4b86b8, #1a3652);
    border-color: rgba(191, 214, 235, 0.18);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.12), 0 8px 18px rgba(4, 11, 20, 0.22);
}

html.theme-dark .user-menu-copy strong,
html.theme-dark .user-menu-summary strong,
html.theme-dark .user-menu-copy small,
html.theme-dark .user-menu-summary small,
html.theme-dark .user-menu-caret {
    color: #e8eef6;
}

html.theme-dark .user-menu-panel {
    background: rgba(20, 30, 41, 0.98);
    border-color: rgba(191, 214, 235, 0.16);
    box-shadow: 0 22px 42px rgba(0, 0, 0, 0.36);
}

html.theme-dark .user-menu-summary,
html.theme-dark .user-menu-link,
html.theme-dark .user-menu-button,
html.theme-dark .user-menu-meta {
    background: rgba(24, 35, 48, 0.94);
    border-color: rgba(191, 214, 235, 0.14);
    color: #e8eef6;
}

html.theme-dark .user-menu-link:hover,
html.theme-dark .user-menu-button:hover {
    background: rgba(30, 44, 59, 0.98);
}

html.theme-dark .user-menu-meta-line strong {
    color: #ffffff;
}

.user-menu.is-open .user-menu-panel {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.user-menu-summary {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 10px;
    border-radius: 16px;
    background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(246,239,230,0.96));
    border: 1px solid rgba(220, 205, 188, 0.78);
    margin-bottom: 10px;
}

.user-menu-stack {
    display: grid;
    gap: 8px;
}

.user-menu-link,
.user-menu-button {
    width: 100%;
    min-height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
    padding: 11px 12px;
    border-radius: 14px;
    border: 1px solid rgba(220, 205, 188, 0.78);
    background: rgba(255,255,255,0.78);
    color: #1f1b18;
    text-decoration: none;
    font-size: 14px;
    cursor: pointer;
}

.user-menu-link:hover,
.user-menu-button:hover {
    background: #fff;
}

.user-menu-link.is-danger,
.user-menu-button.is-danger {
    color: #9b2c2c;
}

.user-menu-meta {
    display: grid;
    gap: 8px;
    padding: 10px;
    border-radius: 16px;
    background: rgba(32, 79, 68, 0.06);
    color: #204f44;
}

.user-menu-meta-line {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 12px;
    line-height: 1.45;
}

.user-menu-meta-line strong {
    color: #1f1b18;
}

.content-main {
    min-width: 0;
}

body.sidebar-collapsed .sidebar .brand-subtitle,
body.sidebar-collapsed .sidebar .brand-label,
body.sidebar-collapsed .sidebar .nav-card h3,
body.sidebar-collapsed .sidebar .link-copy,
body.sidebar-collapsed .sidebar .session-chip small,
body.sidebar-collapsed .sidebar .session-chip strong,
body.sidebar-collapsed .sidebar .sidebar-copy,
body.sidebar-collapsed .sidebar .button-full span,
body.sidebar-collapsed .sidebar .install-trigger span {
    display: none;
}

body.sidebar-collapsed .sidebar .sidebar-link,
body.sidebar-collapsed .sidebar .session-chip,
body.sidebar-collapsed .sidebar .button-full,
body.sidebar-collapsed .sidebar .install-trigger {
    justify-content: center;
    width: 44px;
    min-height: 44px;
    padding: 0;
    margin-inline: auto;
    border-radius: 14px;
}

body.sidebar-collapsed .sidebar-head {
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 10px;
}

body.sidebar-collapsed .sidebar-actions {
    display: flex;
    margin-left: 0;
    flex-direction: column;
    gap: 6px;
}

body.sidebar-collapsed .sidebar .nav-card {
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    gap: 0;
    box-shadow: none;
}

body.sidebar-collapsed .sidebar .brand {
    justify-content: center;
    width: 44px;
    flex: 0 0 auto;
    gap: 0;
}

body.sidebar-collapsed .sidebar .sidebar-control[data-sidebar-pin] {
    width: 38px;
    height: 38px;
    border-radius: 12px;
}

body.sidebar-collapsed .sidebar .sidebar-pin-collapse {
    display: none;
}

body.sidebar-collapsed .sidebar .sidebar-pin-expand {
    display: inline-flex;
}

body.sidebar-collapsed .sidebar .sidebar-close,
body.sidebar-collapsed .sidebar [data-sidebar-section="session"],
body.sidebar-collapsed .sidebar .sidebar-foot {
    display: none;
}

body.sidebar-collapsed .sidebar-nav {
    gap: 14px;
    padding-right: 0;
}

body.sidebar-collapsed .sidebar .nav-list {
    gap: 10px;
}

.login-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.login-actions .install-trigger {
    width: 100%;
    background: rgba(32, 79, 68, 0.08);
    color: var(--shell-accent-2);
    border-color: rgba(32, 79, 68, 0.14);
    justify-content: center;
}

.login-actions [data-install-hint] {
    width: 100%;
    margin: 0;
}

@media (max-width: 1080px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: min(86vw, 320px);
        transform: translateX(-105%);
        transition: transform 180ms ease;
        box-shadow: var(--shell-shadow);
    }

    body.sidebar-open .sidebar {
        transform: translateX(0);
    }

    body.sidebar-collapsed .sidebar {
        transform: translateX(-105%);
        width: min(86vw, 320px);
    }

    body.sidebar-collapsed .sidebar .brand-subtitle,
    body.sidebar-collapsed .sidebar .brand-label,
    body.sidebar-collapsed .sidebar .nav-card h3,
    body.sidebar-collapsed .sidebar .link-copy,
    body.sidebar-collapsed .sidebar .session-chip small,
    body.sidebar-collapsed .sidebar .session-chip strong,
    body.sidebar-collapsed .sidebar .sidebar-copy,
    body.sidebar-collapsed .sidebar .button-full span,
    body.sidebar-collapsed .sidebar .install-trigger span {
        display: initial;
    }

    body.sidebar-collapsed .sidebar-actions {
        display: flex;
    }

    body.sidebar-collapsed .sidebar .sidebar-link,
    body.sidebar-collapsed .sidebar .session-chip,
    body.sidebar-collapsed .sidebar .button-full,
    body.sidebar-collapsed .sidebar .install-trigger {
        justify-content: flex-start;
        padding-inline: 14px;
    }

    .app-header {
        padding: 14px;
    }

    .header-end .header-chip.optional-mobile {
        display: none;
    }
}

@media (max-width: 720px) {
    .app-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .header-start,
    .header-end {
        width: 100%;
        justify-content: space-between;
    }

    .header-end {
        flex-wrap: wrap;
    }

    .user-menu {
        width: 100%;
    }

    .user-menu-trigger {
        width: 100%;
        justify-content: space-between;
    }

    .user-menu-panel {
        right: auto;
        left: 0;
        width: min(100%, 360px);
    }

    .header-chip,
    .header-link {
        font-size: 12px;
        padding: 9px 12px;
    }

    .login-actions {
        flex-direction: column;
    }
}