/* ========================================
   Modern Sidebar Navigation
   ======================================== */

.sidebar-modern {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-fixed);
    transition: transform var(--transition-base), width var(--transition-base);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-modern.collapsed {
    width: 80px;
}

.sidebar-modern.mobile-hidden {
    transform: translateX(-100%);
}

/* Sidebar Header */
.sidebar-header {
    padding: var(--space-6) var(--space-4);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    min-height: 80px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: opacity var(--transition-base);
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    flex-shrink: 0;
}

.sidebar-logo-text {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    white-space: nowrap;
    transition: opacity var(--transition-base);
}

.sidebar-modern.collapsed .sidebar-logo-text {
    opacity: 0;
    width: 0;
}

.sidebar-toggle {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: var(--primary-500);
    color: white;
}

.sidebar-toggle i {
    transition: transform var(--transition-base);
}

.sidebar-modern.collapsed .sidebar-toggle i {
    transform: rotate(180deg);
}

/* Fix: Center toggle button when sidebar is collapsed */
.sidebar-modern.collapsed .sidebar-header {
    justify-content: center;
    padding: var(--space-6) var(--space-2);
}

.sidebar-modern.collapsed .sidebar-logo {
    display: none;
}


/* User Profile Section */
.sidebar-profile {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sidebar-profile-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    flex-shrink: 0;
}

.sidebar-profile-info {
    flex: 1;
    min-width: 0;
    transition: opacity var(--transition-base);
}

.sidebar-modern.collapsed .sidebar-profile-info {
    opacity: 0;
    width: 0;
}

.sidebar-profile-name {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-profile-role {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Navigation Menu */
.sidebar-nav {
    padding: var(--space-4) 0;
}

.sidebar-nav-section {
    margin-bottom: var(--space-6);
}

.sidebar-nav-title {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: opacity var(--transition-base);
}

.sidebar-modern.collapsed .sidebar-nav-title {
    opacity: 0;
    height: 0;
    padding: 0;
}

.sidebar-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav-item {
    margin-bottom: var(--space-1);
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    margin: 0 var(--space-2);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.sidebar-nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: transform var(--transition-fast);
}

.sidebar-nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-nav-link.active {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, transparent 100%);
    color: var(--primary-600);
    font-weight: var(--font-semibold);
}

.sidebar-nav-link.active::before {
    transform: scaleY(1);
}

.sidebar-nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: var(--text-lg);
    transition: transform var(--transition-fast);
}

.sidebar-nav-link:hover .sidebar-nav-icon {
    transform: scale(1.1);
}

.sidebar-nav-text {
    flex: 1;
    white-space: nowrap;
    transition: opacity var(--transition-base);
}

.sidebar-modern.collapsed .sidebar-nav-text {
    opacity: 0;
    width: 0;
}

.sidebar-nav-badge {
    padding: var(--space-1) var(--space-2);
    background: var(--error);
    color: white;
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    border-radius: var(--radius-full);
    min-width: 20px;
    text-align: center;
    transition: opacity var(--transition-base);
}

.sidebar-modern.collapsed .sidebar-nav-badge {
    opacity: 0;
    width: 0;
}

/* Dropdown Menu in Sidebar */
.sidebar-nav-dropdown {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.sidebar-nav-item.has-dropdown.open .sidebar-nav-dropdown {
    max-height: 500px;
}

.sidebar-nav-dropdown-toggle {
    transition: transform var(--transition-fast);
}

.sidebar-nav-item.has-dropdown.open .sidebar-nav-dropdown-toggle {
    transform: rotate(180deg);
}

.sidebar-nav-dropdown .sidebar-nav-link {
    padding-left: calc(var(--space-4) + 20px + var(--space-3));
    font-size: var(--text-sm);
}

/* Sidebar Footer */
.sidebar-footer {
    position: sticky;
    bottom: 0;
    padding: var(--space-4);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    display: flex;
    gap: var(--space-2);
}

.sidebar-footer-btn {
    flex: 1;
    padding: var(--space-3);
    border-radius: var(--radius-lg);
    background: var(--bg-tertiary);
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-footer-btn:hover {
    background: var(--primary-500);
    color: white;
}

.sidebar-modern.collapsed .sidebar-footer {
    flex-direction: column;
}

/* Main Content Area */
.main-content-modern {
    margin-left: 280px;
    min-height: 100vh;
    background: var(--bg-primary);
    transition: margin-left var(--transition-base);
    padding: var(--space-6);
}

.sidebar-modern.collapsed~.main-content-modern {
    margin-left: 80px;
}

/* Mobile Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .sidebar-modern {
        transform: translateX(-100%);
    }

    .sidebar-modern.mobile-visible {
        transform: translateX(0);
    }

    .sidebar-modern.collapsed {
        width: 280px;
    }

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

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

    /* Mobile Header */
    .mobile-header {
        position: sticky;
        top: 0;
        left: 0;
        right: 0;
        height: 60px;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 var(--space-4);
        z-index: var(--z-sticky);
        box-shadow: var(--shadow-sm);
    }

    .mobile-menu-btn {
        width: 40px;
        height: 40px;
        border-radius: var(--radius-md);
        background: transparent;
        border: none;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-primary);
        font-size: var(--text-xl);
    }

    .mobile-header-title {
        font-size: var(--text-lg);
        font-weight: var(--font-bold);
        color: var(--text-primary);
    }
}

@media (min-width: 769px) {
    .mobile-header {
        display: none;
    }

    .sidebar-overlay {
        display: none;
    }
}

/* Tooltip for collapsed sidebar */
.sidebar-modern.collapsed .sidebar-nav-link {
    position: relative;
}

.sidebar-modern.collapsed .sidebar-nav-link::after {
    content: attr(data-title);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%) translateX(8px);
    padding: var(--space-2) var(--space-3);
    background: var(--gray-900);
    color: white;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    pointer-events: none;
    z-index: var(--z-tooltip);
}

.sidebar-modern.collapsed .sidebar-nav-link:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(12px);
}