#layout {
    display: flex;
    height: 100vh;
    overflow: hidden;
}
#sidebar {
    width: 220px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    flex-shrink: 0;
    transition: all 0.3s ease;
}
#main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}
#topbar {
    height: 64px;
    background: var(--bg-base);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    flex-shrink: 0;
}
#page-content {
    flex: 1;
    padding: 32px;
}
#right-panel {
    width: 300px;
    background: var(--bg-base);
    border-left: 1px solid var(--border);
    padding: 24px;
    overflow-y: auto;
    flex-shrink: 0;
}

/* Sidebar Nav */
.nav-section-label {
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    margin-top: 20px;
    margin-bottom: 8px;
    padding-left: 12px;
}
.nav-item {
    height: 40px;
    border-radius: 8px;
    padding: 0 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    transition: all 0.2s;
}
.nav-item i, .nav-item svg { width: 16px; height: 16px; }
.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: var(--nav-active-bg); color: var(--nav-active-text); }
.nav-item.active i, .nav-item.active svg { stroke: white; }

@media (max-width: 1279px) {
    #sidebar { width: 48px; padding: 24px 4px; }
    #sidebar .nav-label, #sidebar .nav-section-label { display: none; }
    #sidebar .nav-item { padding: 0; justify-content: center; }
    #right-panel { width: 100%; border-left: none; }
    #layout { flex-wrap: wrap; }
    #main-wrapper { min-width: 0; }
}

@media (max-width: 767px) {
    #sidebar { display: none; }
    #sidebar.open { display: flex; position: fixed; width: 220px; z-index: 1000; height: 100vh; padding: 24px 16px; }
    #sidebar.open .nav-label, #sidebar.open .nav-section-label { display: block; }
    #sidebar.open .nav-item { justify-content: flex-start; padding: 0 12px; }
    .hamburger { display: flex; }
    #right-panel { display: block; width: 100%; }
    #topbar { padding: 0 16px; }
    #page-content { padding: 16px; }
}