/* ─── App Shell ────────────────────────────────────────────────────────── */
.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ─── Sidebar ──────────────────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--c-sidebar);
    border-right: 1px solid var(--c-sidebar-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: width var(--transition), transform var(--transition);
    overflow: hidden;
}

.sidebar.collapsed { width: 66px; }
.sidebar.collapsed .sidebar-brand-name,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .nav-section-label,
.sidebar.collapsed .sidebar-user-info { display: none; }
.sidebar.collapsed .sidebar-footer { flex-direction: column; }

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-4);
    border-bottom: 1px solid var(--c-sidebar-border);
    min-height: var(--header-h);
}

.sidebar-brand-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-l));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 12px var(--c-primary-muted);
}

.sidebar-brand-name {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--c-text);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4) var(--space-3);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 99px; }

.sidebar-footer {
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--c-sidebar-border);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-user {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    overflow: hidden;
}

.sidebar-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-l));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 800;
    color: white;
    flex-shrink: 0;
}

.sidebar-user-info { overflow: hidden; }

.sidebar-user-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--c-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    font-size: 0.7rem;
    color: var(--c-text-f);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-signout {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-f);
    transition: all var(--transition);
    flex-shrink: 0;
}
.sidebar-signout:hover { background: var(--c-danger-l); color: var(--c-danger); }

/* ─── Main Content ─────────────────────────────────────────────────────── */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-w);
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin-left var(--transition);
}

.main-content.sidebar-collapsed { margin-left: 66px; }

/* ─── Header ───────────────────────────────────────────────────────────── */
.app-header {
    height: var(--header-h);
    background: var(--c-header);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-border);
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 90;
    transition: background var(--transition);
}

.header-left { display: flex; align-items: center; gap: var(--space-4); }
.header-right { display: flex; align-items: center; gap: var(--space-3); }

.breadcrumb { display: flex; align-items: center; gap: var(--space-2); }
.breadcrumb-app { font-size: 0.85rem; color: var(--c-text-f); }
.breadcrumb-sep { color: var(--c-border); font-size: 0.85rem; }
.breadcrumb-page { font-size: 0.85rem; font-weight: 600; color: var(--c-text); }

.sidebar-toggle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-m);
    cursor: pointer;
    transition: all var(--transition);
}
.sidebar-toggle:hover { background: var(--c-bg-s); color: var(--c-text); }

.header-icon-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-m);
    cursor: pointer;
    transition: all var(--transition);
}
.header-icon-btn:hover { background: var(--c-bg-s); color: var(--c-text); }

/* ─── Profile Menu ──────────────────────────────────────────────────────── */
.profile-menu { position: relative; }

.profile-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
}
.profile-trigger:hover { background: var(--c-bg-s); border-color: var(--c-border); }

.header-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-l));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 800;
    color: white;
    flex-shrink: 0;
}

.profile-info { display: flex; flex-direction: column; text-align: left; }
.profile-name { font-size: 0.8rem; font-weight: 600; color: var(--c-text); line-height: 1.2; }
.profile-role { font-size: 0.68rem; color: var(--c-text-f); }

.profile-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 240px;
    background: var(--c-bg-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    z-index: 200;
    overflow: hidden;
    animation: dropdownIn 150ms ease forwards;
}
.profile-dropdown.open { display: block; }

@keyframes dropdownIn {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.profile-dropdown-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
}
.dropdown-avatar {
    width: 40px; height: 40px; border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-l));
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; font-weight: 800; color: white; flex-shrink: 0;
}
.dropdown-name { font-size: 0.85rem; font-weight: 700; color: var(--c-text); }
.dropdown-email { font-size: 0.75rem; color: var(--c-text-f); word-break: break-all; }
.profile-dropdown-divider { height: 1px; background: var(--c-border); }
.profile-dropdown-item {
    display: flex; align-items: center; gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    font-size: 0.85rem; color: var(--c-text-m);
    cursor: pointer; transition: all var(--transition);
}
.profile-dropdown-item:hover { background: var(--c-bg-s); color: var(--c-text); }
.profile-dropdown-item--danger { color: var(--c-danger); }
.profile-dropdown-item--danger:hover { background: var(--c-danger-l); }

/* ─── Page Shell ───────────────────────────────────────────────────────── */
.page-shell {
    padding: var(--space-6) var(--space-8);
    width: 100%;
}

.page-container {
    width: 100%;
}

.page-header {
    margin-bottom: var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.page-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--c-text);
    letter-spacing: -0.02em;
}
.page-subtitle { color: var(--c-text-m); font-size: 0.9rem; margin-top: 4px; }

/* ─── Auth Shell ───────────────────────────────────────────────────────── */
.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--c-bg);
    padding: var(--space-4);
    transition: background var(--transition);
}

/* ─── Alerts ───────────────────────────────────────────────────────────── */
.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
}
.alert-success { background: var(--c-success-l); color: var(--c-success); border: 1px solid rgba(16,185,129,0.2); }
.alert-danger  { background: var(--c-danger-l);  color: var(--c-danger);  border: 1px solid rgba(239,68,68,0.2); }

@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.mobile-open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .main-content.sidebar-collapsed { margin-left: 0; }
    .page-shell { padding: var(--space-4); }
}