.app-shell {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: 260px;
    background: var(--color-sidebar);
    color: var(--color-sidebar-text);
    padding: 24px 18px;
}

.sidebar-brand {
    margin-bottom: 30px;
}

.brand-title {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
}

.brand-subtitle {
    display: block;
    margin-top: 4px;
    font-size: 13px;
    color: #94a3b8;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-link {
    padding: 11px 13px;
    border-radius: 10px;
    color: var(--color-sidebar-text);
}

.sidebar-link:hover,
.sidebar-link.active {
    background: var(--color-sidebar-active);
    color: #ffffff;
}

.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.app-topbar {
    height: 74px;
    background: #ffffff;
    border-bottom: 1px solid var(--color-border);
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.page-title {
    margin: 0;
    font-size: 22px;
}

.page-content {
    padding: 28px;
    flex: 1;
}

.app-footer {
    border-top: 1px solid var(--color-border);
    background: #ffffff;
    padding: 14px 28px;
    display: flex;
    justify-content: space-between;
    color: var(--color-muted);
    font-size: 13px;
}