/* Layout: sidebar + topbar + content grid */

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--color-sidebar);
    color: var(--color-sidebar-text);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition);
}

.sidebar-header {
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    transition: transform 200ms ease, filter 200ms ease;
    cursor: pointer;
}

.sidebar-logo:hover {
    transform: scale(1.06);
    filter: brightness(1.08) drop-shadow(0 4px 16px rgba(46,123,196,0.35));
}

.sidebar-brand {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-sidebar-text-active);
    letter-spacing: -0.02em;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md) 0;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.15) transparent;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.15);
    border-radius: 2px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.3);
}

.nav-section {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
}
.nav-section svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    margin: 2px var(--space-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--color-sidebar-text);
    transition: all var(--transition);
}

.nav-item:hover {
    background-color: var(--color-sidebar-hover);
    color: var(--color-sidebar-text-active);
}

.nav-item.active {
    background-color: var(--color-sidebar-active);
    color: var(--color-sidebar-text-active);
}

.nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.7;
}

.nav-item.active svg,
.nav-item:hover svg {
    opacity: 1;
}

.nav-item-locked {
    cursor: default;
    opacity: 0.35;
    pointer-events: none;
    user-select: none;
}

.nav-item-locked .nav-lock-icon {
    width: 12px;
    height: 12px;
    margin-left: auto;
    opacity: 0.7;
    flex-shrink: 0;
}

.sidebar-user {
    position: relative;
    padding: var(--space-sm) var(--space-sm);
    border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition);
    background: none;
    border: none;
    color: var(--color-sidebar-text);
    text-align: left;
    font-family: inherit;
}

.sidebar-user-trigger:hover {
    background-color: var(--color-sidebar-hover);
}

.sidebar-user-trigger .user-avatar {
    flex-shrink: 0;
}

.sidebar-user-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex: 1;
}

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

.sidebar-user-email {
    font-size: 11px;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-chevron {
    flex-shrink: 0;
    opacity: 0.5;
    transition: transform var(--transition);
}

.sidebar-user.open .sidebar-user-chevron {
    transform: rotate(180deg);
    opacity: 0.8;
}

.sidebar-user .sidebar-user-menu {
    position: absolute;
    bottom: 100%;
    left: var(--space-sm);
    right: var(--space-sm);
    margin-bottom: 4px;
    top: auto;
    margin-top: 0;
    transform: translateY(6px) scale(0.97);
}

.sidebar-user-divider,
.user-dropdown-divider {
    height: 1px;
    background: var(--color-border-light);
    margin: var(--space-xs) 0;
}

.sidebar-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* Main content area */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background-color: var(--color-topbar);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topbar-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.hamburger {
    display: none;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    color: var(--color-text);
}

.hamburger:hover {
    background-color: var(--color-bg);
}

.hamburger svg {
    width: 24px;
    height: 24px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* User dropdown */
.user-dropdown {
    position: relative;
}

.user-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition);
}

.user-dropdown-trigger:hover {
    background-color: var(--color-bg);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
    flex-shrink: 0;
}

.user-avatar:has(img) {
    background-color: transparent;
    overflow: hidden;
    padding: 0;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

/* Topbar settings button */
.topbar-settings-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background-color var(--transition), color var(--transition);
    flex-shrink: 0;
}

.topbar-settings-btn:hover {
    background-color: var(--color-bg);
    color: var(--color-text);
}

.topbar-settings-btn svg {
    width: 18px;
    height: 18px;
}

.user-dropdown-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.user-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-xs);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    padding: var(--space-xs) 0;
    visibility: hidden;
    pointer-events: none;
    z-index: 200;
    opacity: 0;
    transform: translateY(-6px) scale(0.97);
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.user-dropdown-menu.show {
    visibility: visible;
    pointer-events: auto;
    opacity: 1;
    transform: translateY(0) scale(1) !important;
}

.user-dropdown-menu a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    transition: background-color var(--transition);
}

.user-dropdown-menu a:hover {
    background-color: var(--color-bg);
}

.user-dropdown-menu svg {
    width: 16px;
    height: 16px;
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

/* Content */
.content {
    flex: 1;
    padding: var(--space-lg);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-md);
}

.page-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

/* Overlay for mobile sidebar */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 90;
}

.sidebar-overlay.show {
    display: block;
}