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

.sidebar {
    display: flex;
    flex-direction: column;
    min-height: 0;
    border-right: 1px solid var(--border);
    background: var(--surface);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    height: 64px;
    padding: 0 var(--space-5);
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: 700;
    letter-spacing: -0.01em;
    flex: none;
}

.sidebar-nav {
    flex: 1;
    min-height: 0;
    padding: 0 var(--space-3) var(--space-3);
    overflow-y: auto;
}

.nav-group + .nav-group {
    margin-top: var(--space-4);
}

.nav-group-label {
    padding: 0 var(--space-3) var(--space-1);
    color: var(--text-tertiary);
    font-size: var(--text-xs);
    font-weight: 500;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    height: 34px;
    padding: 0 var(--space-3);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
}

.nav-link:hover {
    background: var(--surface-hover);
    color: var(--text);
    text-decoration: none;
}

.nav-link[aria-current="page"] {
    background: var(--accent-soft);
    color: var(--accent-text);
}

.sidebar-footer {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-3);
    border-top: 1px solid var(--border);
    flex: none;
}

.account-link {
    display: flex;
    align-items: center;
    flex: 1;
    gap: var(--space-3);
    min-width: 0;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    color: var(--text);
}

.account-link:hover {
    background: var(--surface-hover);
    text-decoration: none;
}

.account-name {
    overflow: hidden;
    font-weight: 500;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: none;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--neutral-soft);
    color: var(--text-secondary);
    font-size: var(--text-xs);
    font-weight: 600;
}

.main {
    min-width: 0;
    overflow-y: auto;
}

.mobile-bar {
    display: none;
}

.page {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-6) var(--space-6) var(--space-7);
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.page-title-group {
    min-width: 0;
}

.page-subtitle {
    margin-top: var(--space-1);
    color: var(--text-secondary);
}

.page-back {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.page-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: var(--space-2);
}

.page-actions .select {
    width: auto;
    min-width: 96px;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.toolbar .select {
    width: auto;
    min-width: 140px;
}

.toolbar .input[type="date"] {
    width: auto;
}

.stack {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.stack-sm {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
}

.row-between {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
}

.form-grid .span-2 {
    grid-column: 1 / -1;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
}

.detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-4);
}

.permission-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--border);
}

.permission-row:last-child {
    border-bottom: 0;
}

.permission-row .select {
    width: 150px;
}

.logo-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 180px;
    height: 88px;
    padding: var(--space-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #ffffff;
}

.logo-preview img {
    max-width: 100%;
    max-height: 100%;
}

.auth-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-5);
}

.auth-card {
    width: min(400px, 100%);
    padding: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.auth-brand {
    margin-bottom: var(--space-1);
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
}

.auth-subtitle {
    margin-bottom: var(--space-5);
    color: var(--text-secondary);
}

.styleguide-swatches {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(112px, 1fr));
    gap: var(--space-3);
}

.swatch {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    font-size: var(--text-xs);
    color: var(--text-secondary);
}

.swatch-color {
    height: 52px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}

html[data-desktop="darwin"] body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    height: 28px;
    -webkit-app-region: drag;
}

html[data-desktop="darwin"] .sidebar-brand {
    height: 76px;
    padding-top: var(--space-5);
}

html[data-desktop="darwin"] .page {
    padding-top: var(--space-7);
}

@media (max-width: 1024px) {
    .app-shell {
        grid-template-columns: minmax(0, 1fr);
        grid-template-rows: auto minmax(0, 1fr);
    }

    .mobile-bar {
        display: flex;
        align-items: center;
        gap: var(--space-2);
        height: 52px;
        padding: 0 var(--space-3);
        border-bottom: 1px solid var(--border);
        background: var(--surface);
        font-family: var(--font-heading);
        font-weight: 700;
    }

    .sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        z-index: 40;
        width: var(--sidebar-width);
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform var(--transition);
    }

    .app-shell.nav-open .sidebar {
        transform: none;
    }

    .nav-backdrop {
        position: fixed;
        inset: 0;
        z-index: 30;
        background: var(--overlay);
    }

    .page {
        padding: var(--space-5) var(--space-4) var(--space-6);
    }

    html[data-desktop="darwin"] .mobile-bar {
        height: 60px;
        padding-top: var(--space-4);
    }

    html[data-desktop="darwin"] .page {
        padding-top: var(--space-5);
    }
}

@media (min-width: 1025px) {
    .nav-backdrop {
        display: none;
    }
}

@media (max-width: 820px) {
    .detail-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 600px) {
    .form-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .page-header {
        flex-direction: column;
    }

    .search {
        max-width: none;
    }

    .toolbar .select,
    .toolbar .input[type="date"] {
        flex: 1 1 140px;
    }
}