/* ==========================================================================
   Horizontal Layout System - Toggleable Sidebar + Top Navigation
   ========================================================================== */

/* Layout Container */
.layout-horizontal {
    display: grid;
    grid-template-areas:
        "topnav topnav"
        "sidebar main";
    grid-template-columns: 70px 1fr;
    grid-template-rows: 60px 1fr;
    min-height: 100vh;
    transition: grid-template-columns 0.3s ease;
}

.layout-horizontal.sidebar-expanded {
    grid-template-columns: 240px 1fr;
}

/* ==========================================================================
   Top Navigation Bar
   ========================================================================== */
.top-navigation {
    grid-area: topnav;
    background: var(--card);
    border-bottom: 2px solid var(--border);
    box-shadow: var(--shadow-x) var(--shadow-y) var(--shadow-blur) var(--shadow-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    gap: 30px;
    position: sticky;
    top: 0;
    z-index: 100;
}

/* Top Nav - Left Section */
.top-nav-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.sidebar-toggle-btn {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    background: var(--background);
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: var(--foreground);
    font-size: 1.2rem;
}

.sidebar-toggle-btn:hover {
    background: var(--primary);
    color: var(--primary-foreground);
    transform: translateY(-2px);
    box-shadow: var(--shadow-x) var(--shadow-y) var(--shadow-blur) var(--shadow-color);
}

.app-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--foreground);
}

.app-logo i {
    color: var(--primary);
    font-size: 1.5rem;
}

/* Top Nav Tabs */
.top-nav-tabs {
    display: flex;
    align-items: center;
    gap: 5px;
    flex: 1;
}

.top-nav-tab {
    padding: 10px 20px;
    border: 2px solid transparent;
    background: transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
    color: var(--muted-foreground);
    text-decoration: none;
    white-space: nowrap;
}

.top-nav-tab:hover {
    background: var(--muted);
    color: var(--foreground);
}

.top-nav-tab.active {
    background: var(--primary);
    color: var(--primary-foreground);
    border-color: var(--border);
    box-shadow: var(--shadow-x) var(--shadow-y) var(--shadow-blur) var(--shadow-color);
}

/* Top Nav - Right Section */
.top-nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.top-nav-action {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    background: var(--background);
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: var(--foreground);
}

.top-nav-action:hover {
    background: var(--muted);
    transform: translateY(-2px);
    box-shadow: var(--shadow-x) var(--shadow-y) var(--shadow-blur) var(--shadow-color);
}

/* ==========================================================================
   Collapsible Sidebar
   ========================================================================== */
.collapsible-sidebar {
    grid-area: sidebar;
    background: var(--card);
    border-right: 2px solid var(--border);
    box-shadow: var(--shadow-x) var(--shadow-y) var(--shadow-blur) var(--shadow-color);
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: auto;
    transition: all 0.3s ease;
    position: relative;
    width: 100%;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 10px 0;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

.sidebar-nav-group {
    margin-bottom: 20px;
}

.collapsible-sidebar:not(.sidebar-expanded) .sidebar-nav-group {
    margin-bottom: 10px;
}

.sidebar-nav-label {
    padding: 10px 15px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--muted-foreground);
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity 0.3s ease, max-height 0.3s ease;
}

.layout-horizontal.sidebar-expanded .sidebar-nav-label {
    opacity: 1 !important;
    max-height: 50px !important;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 15px;
    color: var(--foreground);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
    position: relative;
    min-height: 48px;
}

.collapsible-sidebar:not(.sidebar-expanded) .sidebar-nav-item {
    padding: 14px 0;
    justify-content: center;
    gap: 0;
}

.layout-horizontal.sidebar-expanded .sidebar-nav-item {
    gap: 12px !important;
    justify-content: flex-start !important;
}

.sidebar-nav-item:hover {
    background: var(--muted);
    border-left-color: var(--primary);
}

.sidebar-nav-item.active {
    background: var(--primary);
    color: var(--primary-foreground);
    border-left-color: var(--border);
    box-shadow: inset var(--shadow-x) var(--shadow-y) var(--shadow-blur) var(--shadow-color);
}

.collapsible-sidebar:not(.sidebar-expanded) .sidebar-nav-item.active {
    border-left: none;
    border-radius: 8px;
    margin: 4px;
}

.sidebar-nav-item i {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
    display: inline-block;
    opacity: 1;
    visibility: visible;
}

.collapsible-sidebar:not(.sidebar-expanded) .sidebar-nav-item i {
    font-size: 1.5rem;
    width: 100%;
    opacity: 1;
    visibility: visible;
}

.layout-horizontal.sidebar-expanded .sidebar-nav-item i {
    font-size: 1.25rem !important;
    width: 24px !important;
}

.sidebar-nav-item span {
    white-space: nowrap;
    opacity: 0;
    width: 0;
    overflow: hidden;
    transition: opacity 0.3s ease, width 0.3s ease;
    display: inline-block;
}

.layout-horizontal.sidebar-expanded .sidebar-nav-item span {
    opacity: 1 !important;
    width: auto !important;
    display: inline-block !important;
}

/* Tooltip for collapsed state */
.sidebar-nav-item::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    background: var(--foreground);
    color: var(--background);
    padding: 5px 10px;
    border-radius: var(--radius);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    margin-left: 10px;
    font-size: 0.875rem;
    transition: opacity 0.2s ease;
    z-index: 1000;
}

.collapsible-sidebar:not(.sidebar-expanded) .sidebar-nav-item:hover::after {
    opacity: 1;
}

/* Sidebar User Profile */
.sidebar-user {
    padding: 15px;
    border-top: 2px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    justify-content: center;
}

.layout-horizontal.sidebar-expanded .sidebar-user {
    justify-content: flex-start !important;
    gap: 12px !important;
}

.collapsible-sidebar:not(.sidebar-expanded) .sidebar-user {
    padding: 15px 0;
}

.sidebar-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--primary-foreground);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    border: 2px solid var(--border);
}

.collapsible-sidebar:not(.sidebar-expanded) .sidebar-user-avatar {
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
}

.sidebar-user-info {
    opacity: 0;
    max-width: 0;
    transition: opacity 0.3s ease, max-width 0.3s ease;
    flex: 1;
    overflow: hidden;
}

.layout-horizontal.sidebar-expanded .sidebar-user-info {
    opacity: 1 !important;
    max-width: 200px !important;
}

.sidebar-user-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--foreground);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-email {
    font-size: 0.75rem;
    color: var(--muted-foreground);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ==========================================================================
   Main Content Area
   ========================================================================== */
.main-content-horizontal {
    grid-area: main;
    padding: 30px;
    background: var(--background);
    overflow-y: auto;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    /* Mobile: Hide top nav tabs, show hamburger */
    .top-nav-tabs {
        display: none;
    }

    .hamburger-menu {
        display: flex !important;
    }

    /* Sidebar becomes overlay */
    .collapsible-sidebar {
        position: fixed;
        left: 0;
        top: 60px;
        bottom: 0;
        z-index: 200;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar-expanded .collapsible-sidebar {
        transform: translateX(0);
    }

    /* Overlay backdrop */
    .sidebar-backdrop {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 199;
    }

    .sidebar-expanded .sidebar-backdrop {
        display: block;
    }

    /* Adjust main content grid */
    .layout-horizontal {
        grid-template-columns: 0 1fr;
    }

    .layout-horizontal.sidebar-expanded {
        grid-template-columns: 240px 1fr;
    }
}

@media (max-width: 480px) {
    .top-navigation {
        padding: 0 10px;
        gap: 10px;
    }

    .app-logo span {
        display: none;
    }

    .main-content-horizontal {
        padding: 15px;
    }
}

/* ==========================================================================
   Hamburger Menu Icon (Mobile)
   ========================================================================== */
.hamburger-menu {
    display: none;
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    background: var(--background);
    border-radius: var(--radius);
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
}

.hamburger-menu span {
    width: 20px;
    height: 2px;
    background: var(--foreground);
    transition: all 0.3s ease;
}

.hamburger-menu:hover {
    background: var(--muted);
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translateY(6px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-6px);
}

/* ==========================================================================
   Scrollbar Styling
   ========================================================================== */
.sidebar-nav::-webkit-scrollbar,
.main-content-horizontal::-webkit-scrollbar {
    width: 6px;
}

.sidebar-nav::-webkit-scrollbar-track,
.main-content-horizontal::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb,
.main-content-horizontal::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover,
.main-content-horizontal::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}