:root {
    --admin-primary: #3b82f6;
    --admin-primary-dark: #2563eb;
    --admin-sidebar-bg: #ffffff;
    --admin-sidebar-border: #e5e7eb;
    --admin-sidebar-text: #1e293b;
    --admin-sidebar-text-muted: #64748b;
    --admin-sidebar-hover-bg: #f1f5f9;
    --admin-sidebar-active-bg: #eff6ff;
    --admin-sidebar-active-text: #2563eb;
    --admin-content-bg: #f1f5f9;
    --admin-topbar-bg: #ffffff;
    --admin-topbar-border: #e5e7eb;
    --admin-text: #1e293b;
    --admin-text-muted: #64748b;
}

:root[data-admin-theme="dark"] {
    --admin-sidebar-bg: #1e293b;
    --admin-sidebar-border: #334155;
    --admin-sidebar-text: #f1f5f9;
    --admin-sidebar-text-muted: #94a3b8;
    --admin-sidebar-hover-bg: #334155;
    --admin-sidebar-active-bg: rgba(59, 130, 246, 0.15);
    --admin-sidebar-active-text: #60a5fa;
    --admin-content-bg: #0f172a;
    --admin-topbar-bg: #1e293b;
    --admin-topbar-border: #334155;
    --admin-text: #f1f5f9;
    --admin-text-muted: #94a3b8;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-admin-theme="light"]):not([data-admin-theme="dark"]) {
        --admin-sidebar-bg: #1e293b;
        --admin-sidebar-border: #334155;
        --admin-sidebar-text: #f1f5f9;
        --admin-sidebar-text-muted: #94a3b8;
        --admin-sidebar-hover-bg: #334155;
        --admin-sidebar-active-bg: rgba(59, 130, 246, 0.15);
        --admin-sidebar-active-text: #60a5fa;
        --admin-content-bg: #0f172a;
        --admin-topbar-bg: #1e293b;
        --admin-topbar-border: #334155;
        --admin-text: #f1f5f9;
        --admin-text-muted: #94a3b8;
    }
}

.admin-shell {
    display: flex;
    min-height: 100vh;
    background-color: var(--admin-content-bg);
    color: var(--admin-text);
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.sidebar-region {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: stretch;
    flex-shrink: 0;
    height: 100vh;
}

.admin-sidebar {
    display: flex;
    flex-direction: column;
    width: 260px;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    background-color: var(--admin-sidebar-bg);
    border-right: 1px solid var(--admin-sidebar-border);
    transition: width 0.2s ease;
}

.admin-sidebar-collapsed {
    width: 68px;
}

.sidebar-toggle {
    position: absolute;
    top: 50%;
    right: -14px;
    z-index: 25;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    padding: 0;
    color: var(--admin-sidebar-text-muted);
    text-decoration: none;
    background-color: var(--admin-sidebar-bg);
    border: 1px solid var(--admin-sidebar-border);
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transform: translateY(-50%);
    transition: all 0.15s ease;
}

.sidebar-toggle:hover {
    color: var(--admin-sidebar-text);
    background-color: var(--admin-sidebar-hover-bg);
}

.admin-sidebar-header {
    padding: 1rem 1.5rem;
}

.admin-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--admin-sidebar-text);
    text-decoration: none;
}

.admin-brand:hover {
    color: var(--admin-sidebar-text);
}

.admin-brand-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 0.5rem;
    background: linear-gradient(135deg, #0f766e, #14b8a6);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.admin-brand-text {
    color: var(--admin-sidebar-text);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.admin-nav {
    padding: 1rem 0;
}

.admin-nav .nav-item {
    padding: 0.125rem 0.75rem;
}

.admin-nav .nav-link,
.admin-back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    overflow: hidden;
    padding: 0.625rem 0.75rem;
    border-radius: 0.5rem;
    color: var(--admin-sidebar-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.15s ease;
}

.admin-nav .nav-link:hover,
.admin-back-link:hover {
    color: var(--admin-sidebar-text);
    background-color: var(--admin-sidebar-hover-bg);
}

.admin-nav .nav-link.active {
    color: var(--admin-sidebar-active-text);
    background-color: var(--admin-sidebar-active-bg);
}

.admin-nav .nav-link i,
.admin-back-link i {
    flex-shrink: 0;
    width: 1.5rem;
    text-align: center;
    font-size: 1.1rem;
}

.nav-section-label {
    overflow: hidden;
    padding: 0.25rem 0.75rem 0.375rem;
    padding-top: 0.75rem;
    color: var(--admin-sidebar-text-muted);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    white-space: nowrap;
}

.nav-divider {
    margin: 0.25rem 0.75rem;
    border-color: var(--admin-sidebar-border);
    opacity: 0.5;
}

.admin-sidebar-footer {
    margin-top: auto;
    padding: 1rem;
}

.admin-back-link {
    padding: 0.625rem 0.75rem;
}

.admin-main {
    flex: 1;
    min-width: 0;
}

.admin-topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.5rem;
    padding: 0 1.5rem;
    background-color: var(--admin-topbar-bg);
    border-bottom: 1px solid var(--admin-topbar-border);
    gap: 1rem;
}

.admin-topbar h2 {
    margin: 0;
    color: var(--admin-text);
    font-size: 1.2rem;
    font-weight: 700;
}

.admin-topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
    margin-right: 0.75rem;
}

.admin-eyebrow,
.admin-auth-eyebrow {
    display: block;
    margin-bottom: 0.2rem;
    color: var(--admin-primary);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.admin-content {
    min-height: calc(100vh - 3.5rem);
    padding: 1.5rem 2rem;
    background-color: var(--admin-content-bg);
    border-top-left-radius: 0.625rem;
}

.admin-auth-card {
    max-width: 460px;
    margin: 12vh auto 0;
    padding: 2rem;
    background: var(--admin-topbar-bg);
    border: 1px solid var(--admin-topbar-border);
    border-radius: 1rem;
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
}

.admin-auth-card h1 {
    margin: 0 0 0.75rem;
    color: var(--admin-text);
    font-size: 1.8rem;
}

.admin-auth-card p {
    margin-bottom: 1.5rem;
    color: var(--admin-text-muted);
}

.admin-auth-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    padding: 0 1.15rem;
    border-radius: 0.75rem;
    background: var(--admin-primary);
    color: #ffffff;
    font-weight: 700;
    text-decoration: none;
}

.admin-auth-button:hover {
    background: var(--admin-primary-dark);
    color: #ffffff;
}

.user-menu-wrapper {
    position: relative;
}

.user-menu-backdrop {
    position: fixed;
    inset: 0;
    z-index: 999;
    background: transparent;
    border: 0;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    border-radius: 0.75rem;
    color: var(--admin-text);
    cursor: pointer;
}

.user-menu-trigger .hx-button-content,
.user-menu-trigger span {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
}

.user-initials {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.1rem;
    height: 2.1rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #0f766e, #14b8a6);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.user-greeting {
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.9rem;
    font-weight: 700;
}

.user-chevron {
    color: var(--admin-text-muted);
    font-size: 0.75rem;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    z-index: 1000;
    width: 280px;
    overflow: hidden;
    background: var(--admin-topbar-bg);
    border: 1px solid var(--admin-topbar-border);
    border-radius: 0.9rem;
    box-shadow: 0 18px 35px rgba(15, 23, 42, 0.16);
}

.user-dropdown-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem;
}

.user-dropdown-avatar {
    width: 2.75rem;
    height: 2.75rem;
}

.user-dropdown-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.user-dropdown-name {
    overflow: hidden;
    color: var(--admin-text);
    font-size: 0.9rem;
    font-weight: 800;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-dropdown-email {
    overflow: hidden;
    color: var(--admin-text-muted);
    font-size: 0.78rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-dropdown-divider {
    margin: 0;
    border-color: var(--admin-topbar-border);
    opacity: 1;
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--admin-text);
    font-size: 0.86rem;
    font-weight: 700;
    text-decoration: none;
}

.user-dropdown-item:hover {
    background: var(--admin-sidebar-hover-bg);
    color: var(--admin-text);
}

.user-dropdown-item-danger {
    color: #dc2626;
}

.user-dropdown-item-danger:hover {
    background: #fef2f2;
    color: #dc2626;
}

#blazor-error-ui {
    background: lightyellow;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

@media (max-width: 900px) {
    .admin-shell {
        flex-direction: column;
    }

    .sidebar-region {
        position: relative;
        width: 100%;
        height: auto;
    }

    .admin-sidebar {
        position: relative;
        width: 100%;
        height: auto;
    }

    .admin-sidebar-collapsed {
        width: 0;
    }

    .sidebar-toggle {
        top: 1.75rem;
        right: 0.75rem;
        transform: none;
    }

    .admin-nav {
        overflow-x: auto;
    }

    .admin-sidebar-footer {
        display: none;
    }

    .admin-topbar {
        position: relative;
        gap: 1rem;
        align-items: flex-start;
        flex-direction: column;
        height: auto;
        padding: 1rem;
    }

    .admin-topbar-actions {
        margin-left: 0;
        margin-right: 0;
    }
}