/* ============================================================
   APP LAYOUT (shell, sidebar, topbar)
   (split from style.css, lines 250-419)
   ============================================================ */

/* ======================================================
   APP LAYOUT
   ====================================================== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ── Sidebar ────────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-2);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    transition: transform var(--transition);
    transition: width 0.2s ease;
}
.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 20px 0;
    height: var(--topbar-h);
}
.sidebar-logo-icon {
    width: 34px; height: 34px;
    background: var(--accent-strong);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; font-weight: 800;
    color: var(--on-accent);
    font-family: var(--font-head);
}
.sidebar-logo h1 {
    font-family: var(--font-head);
    font-size: 0.95rem;
    font-weight: 700;
}
.sidebar-nav {
    flex: 1;
    padding: 24px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow-y: auto;
}
.nav-section-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-3);
    padding: 12px 10px 6px;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: var(--radius-md);
    color: var(--text-2);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    position: relative;
}
.nav-item:hover { background: var(--bg-3); color: var(--text-1); }
.nav-item.active {
    background: var(--accent-dim);
    color: var(--accent);
    border-color: var(--border);
}
.nav-item .nav-icon { font-size: 1.1rem; width: 22px; text-align: center; }
.nav-badge {
    margin-left: auto;
    background: var(--accent-strong);
    color: var(--on-accent);
    font-size: 0.68rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 99px;
}
.sidebar-footer {
    padding: 16px 12px;
    border-top: 1px solid var(--border);
}
.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition);
}
.sidebar-user:hover { background: var(--bg-3); }
.user-avatar {
    width: 34px; height: 34px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}
.sidebar-user-info { flex: 1; min-width: 0; }
.sidebar-user-name {
    font-size: 0.88rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sidebar-user-role {
    font-size: 0.72rem;
    color: var(--text-3);
    text-transform: capitalize;
}

/* ── Main Content ───────────────────────────────────────────── */
.main-content {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.topbar {
    height: var(--topbar-h);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 28px;
    gap: 16px;
    position: sticky;
    top: 0;
    background: var(--topbar-bg);
    backdrop-filter: blur(12px);
    z-index: 50;
}
.topbar-title {
    font-family: var(--font-head);
    font-size: 1.05rem;
    font-weight: 700;
    flex: 1;
}
.topbar-search {
    flex: 1;
    max-width: 320px;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px 14px;
    color: var(--text-1);
    font-size: 0.88rem;
    outline: none;
    transition: border-color var(--transition);
}
.topbar-search:focus { border-color: var(--accent); }
.page-content {
    flex: 1;
    padding: 28px;
}