/* ============================================================================
   Kweezi Food POS - Layout (Header, Sidebar, Content)
   ============================================================================ */

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

/* --- Header --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-header);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    min-width: calc(var(--sidebar-width) - var(--spacing-lg));
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.header-logo img {
    height: 32px;
}

.header-logo span {
    color: var(--text-primary);
}

.sidebar-toggle {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.sidebar-toggle:hover {
    background: var(--bg-light);
    color: var(--text-primary);
}

.header-center {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
}

.header-search {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.header-search input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-light);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.header-search input:focus {
    background: var(--bg-white);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.header-search .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

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

.header-action {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.header-action:hover {
    background: var(--bg-light);
    color: var(--primary);
}

.header-action .notification-dot {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid var(--bg-white);
}

.header-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 4px 8px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.header-user:hover {
    background: var(--bg-light);
}

.header-user-info {
    text-align: right;
    line-height: 1.3;
}

.header-user-info .name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.header-user-info .role {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--bg-white);
    border-right: 1px solid var(--border-color);
    z-index: var(--z-sidebar);
    overflow-y: auto;
    overflow-x: hidden;
    transition: var(--transition);
    padding: var(--spacing-md) 0;
}

/* Sidebar sections */
.sidebar-section {
    margin-bottom: var(--spacing-sm);
}

.sidebar-section-title {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

/* Menu items */
.menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px var(--spacing-lg);
    color: var(--secondary);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    border-radius: 0;
    text-decoration: none;
    position: relative;
}

.menu-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.menu-item:hover .menu-icon {
    color: var(--primary);
}

.menu-item.active {
    color: var(--primary);
    background: var(--primary-light);
}

.menu-item.active .menu-icon {
    color: var(--primary);
}

.menu-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: var(--transition-fast);
}

.menu-label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.menu-badge {
    background: var(--danger);
    color: var(--text-white);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* Submenu */
.menu-item.has-submenu .menu-arrow {
    transition: var(--transition-fast);
}

.menu-item.has-submenu.expanded .menu-arrow {
    transform: rotate(90deg);
}

.submenu {
    display: none;
    padding-left: var(--spacing-lg);
}

.submenu.show {
    display: block;
}

.submenu .menu-item {
    padding: 8px var(--spacing-lg);
    font-size: var(--font-size-sm);
}

/* --- Collapsed Sidebar --- */
.app.sidebar-collapsed .sidebar {
    width: var(--sidebar-collapsed-width);
}

.app.sidebar-collapsed .sidebar .menu-label,
.app.sidebar-collapsed .sidebar .menu-arrow,
.app.sidebar-collapsed .sidebar .menu-badge,
.app.sidebar-collapsed .sidebar .sidebar-section-title {
    display: none;
}

.app.sidebar-collapsed .sidebar .menu-item {
    justify-content: center;
    padding: 10px;
}

.app.sidebar-collapsed .sidebar .menu-icon {
    margin: 0;
}

.app.sidebar-collapsed .sidebar .submenu {
    display: none !important;
}

.app.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

.app.sidebar-collapsed .header-left {
    min-width: calc(var(--sidebar-collapsed-width) - var(--spacing-lg));
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: var(--spacing-lg);
    min-height: calc(100vh - var(--header-height));
    transition: var(--transition);
}

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

.page-header h2 {
    font-size: var(--font-size-xl);
}

.page-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.page-breadcrumb a {
    color: var(--text-muted);
}

.page-breadcrumb a:hover {
    color: var(--primary);
}

.page-breadcrumb .separator {
    color: var(--border-color);
}

/* --- Mobile Sidebar Overlay --- */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-sidebar) - 1);
    pointer-events: none;
}
.app.sidebar-open .sidebar-overlay {
    pointer-events: auto;
}

/* --- Responsive --- */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .app.sidebar-open .sidebar {
        transform: translateX(0);
    }

    .app.sidebar-open .sidebar-overlay {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .app.sidebar-collapsed .main-content {
        margin-left: 0;
    }

    .header-left {
        min-width: auto;
    }

    .header-search {
        display: none;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .header {
        padding: 0 var(--spacing-md);
    }

    .header-user-info {
        display: none;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}