/* ============================================
   V2 Sidebar Navigation
   Uses global design tokens from theme-default.css
   ============================================ */

:root {
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --sidebar-bg: var(--ma-dark-bg);
    --sidebar-text: var(--ma-dark-text);
    --sidebar-text-muted: var(--ma-dark-text-muted);
    --sidebar-hover-bg: var(--ma-accent-light);
    --sidebar-active-bg: linear-gradient(135deg, var(--ma-accent) 0%, var(--ma-accent-hover) 100%);
    --sidebar-border: rgba(255, 255, 255, 0.1);
    --sidebar-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
    --transition-speed: 0.3s;
}

/* ============================================
   Sidebar Container
   ============================================ */
.v2-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    box-shadow: var(--sidebar-shadow);
    display: flex;
    flex-direction: column;
    transition: width var(--transition-speed) ease, transform var(--transition-speed) ease, box-shadow 0.6s ease;
    z-index: 1000;
    overflow: hidden;
}

/* Role switch highlight animation */
@keyframes roleFlash {
    0% { background: rgba(124,106,255,0.15); }
    100% { background: transparent; }
}
.nav-item.role-highlight a { animation: roleFlash 0.8s ease-out; }

.v2-sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

@media (max-width: 992px) {
    .v2-sidebar {
        transform: translateX(-100%);
    }
    .v2-sidebar.show {
        transform: translateX(0);
    }
}

/* ============================================
   Sidebar Header
   ============================================ */
.sidebar-header {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid var(--sidebar-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-brand i {
    font-size: 1.5rem;
    color: var(--ma-accent);
    flex-shrink: 0;
}

.sidebar-brand .sidebar-logo {
    flex-shrink: 0;
    border-radius: 6px;
}

.sidebar-brand .brand-text {
    font-size: 0.85rem;
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: opacity var(--transition-speed) ease;
}

.v2-sidebar.collapsed .sidebar-header {
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 0.5rem;
    padding: 1rem 0.5rem;
}

.v2-sidebar.collapsed .brand-text {
    opacity: 0;
    width: 0;
}

.sidebar-toggle {
    background: transparent;
    border: 1px solid var(--sidebar-border);
    color: var(--sidebar-text);
    width: 32px;
    height: 32px;
    border-radius: var(--ma-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.sidebar-toggle:hover {
    background: var(--sidebar-hover-bg);
    border-color: var(--ma-accent);
    color: var(--ma-accent);
}

.v2-sidebar.collapsed .sidebar-toggle i {
    transform: rotate(180deg);
}

/* ============================================
   Sidebar Navigation
   ============================================ */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1rem 0;
}

.sidebar-nav::-webkit-scrollbar { width: 6px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 3px; }
.sidebar-nav::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }

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

.nav-item {
    margin: 0.25rem 0.75rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--sidebar-text) !important;
    text-decoration: none;
    border-radius: var(--ma-radius-md);
    transition: all 0.2s ease;
    position: relative;
    white-space: nowrap;
}

.nav-link i {
    font-size: 1.25rem;
    flex-shrink: 0;
    width: 24px;
    text-align: center;
    color: inherit;
}

.nav-link .nav-text {
    flex: 1;
    transition: opacity var(--transition-speed) ease;
    color: inherit;
}

.v2-sidebar.collapsed .nav-text { opacity: 0; width: 0; }

.nav-link:hover {
    background: var(--sidebar-hover-bg);
    color: var(--ma-accent) !important;
}

.nav-link:hover .nav-text {
    color: var(--ma-accent) !important;
}

.nav-link.active {
    background: var(--sidebar-active-bg);
    color: white !important;
    box-shadow: 0 4px 12px rgba(124, 106, 255, 0.3);
}

.nav-link.active .nav-text { color: white !important; }
.nav-link.active i { color: white !important; }

/* Submenu */
.nav-item.has-submenu .nav-link { position: relative; }

.submenu-arrow {
    margin-left: auto;
    font-size: 0.875rem;
    transition: transform 0.2s ease;
}

.nav-link[aria-expanded="true"] .submenu-arrow { transform: rotate(180deg); }

.submenu {
    list-style: none;
    padding: 0.5rem 0 0.5rem 3rem;
    margin: 0;
}

.submenu-link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--sidebar-text-muted);
    text-decoration: none;
    border-radius: var(--ma-radius-sm);
    transition: all 0.2s ease;
    font-size: 0.9375rem;
}

.submenu-link:hover {
    background: var(--sidebar-hover-bg);
    color: var(--ma-accent);
}

.v2-sidebar.collapsed .submenu { display: none; }

/* Nav Divider */
.nav-divider {
    height: 1px;
    background: var(--sidebar-border);
    margin: 1rem 1.5rem;
}

/* Section labels — collapsible */
.nav-section-label {
    padding: 1.2rem 1.5rem 0.3rem;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--sidebar-text-muted);
    opacity: 0.6;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
    transition: opacity 0.2s;
}
.nav-section-label:hover { opacity: 1; }

.nav-section-chevron {
    font-size: 0.55rem;
    transition: transform 0.25s ease;
}
.nav-section-label.collapsed .nav-section-chevron {
    transform: rotate(-90deg);
}

.v2-sidebar.collapsed .nav-section-label { display: none; }

/* ============================================
   Sidebar Footer (User Profile)
   ============================================ */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--sidebar-border);
    background: rgba(0, 0, 0, 0.2);
}

.v2-sidebar.collapsed .sidebar-footer {
    padding: 0.5rem;
    background: transparent;
    border-top: none;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--ma-radius-md);
    transition: all 0.2s ease;
}

.user-profile:hover { background: rgba(255, 255, 255, 0.08); }

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--ma-radius-circle);
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--ma-accent) 0%, var(--ma-accent-cyan) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-avatar i { font-size: 1.5rem; color: white; }

.user-info {
    flex: 1;
    min-width: 0;
    transition: opacity var(--transition-speed) ease;
}

.v2-sidebar.collapsed .user-info { display: none; }

.user-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: white;
    white-space: normal;
    word-break: break-word;
    line-height: 1.3;
}

.user-email {
    font-size: 0.8125rem;
    color: var(--sidebar-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-actions {
    display: flex;
    gap: 0.5rem;
    transition: opacity var(--transition-speed) ease;
}

.v2-sidebar.collapsed .user-actions { display: none; }

/* Collapsed states */
.v2-sidebar.collapsed .sidebar-lang { flex-direction: column; gap: 2px; padding: 4px 0; }
.v2-sidebar.collapsed .sidebar-lang .lang-divider { display: none; }
.v2-sidebar.collapsed .user-profile { justify-content: center; padding: 0.25rem; background: transparent; border-radius: 50%; }

.action-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--ma-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sidebar-text);
    text-decoration: none;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.action-btn:hover {
    background: var(--sidebar-hover-bg);
    border-color: var(--ma-accent);
    color: var(--ma-accent);
}

.sidebar-cta { padding: 0.5rem; }

.sidebar-cta .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    border-radius: var(--ma-radius-md);
    font-weight: 600;
}

/* ============================================
   Sidebar Overlay (Mobile)
   ============================================ */
.sidebar-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.sidebar-overlay.show { opacity: 1; visibility: visible; }
@media (min-width: 993px) { .sidebar-overlay { display: none; } }

/* ============================================
   Main Content Adjustment
   ============================================ */
.v2-main {
    margin-left: 280px;
    transition: margin-left var(--transition-speed) ease;
    min-height: 100vh;
}

.v2-main-no-sidebar { margin-left: 0 !important; }
.v2-sidebar.collapsed ~ .v2-main { margin-left: 80px; }
@media (max-width: 992px) { .v2-main { margin-left: 0; } }

/* ============================================
   Mobile Menu Button
   ============================================ */
.mobile-menu-btn {
    position: fixed;
    top: 1rem; left: 1rem;
    width: 48px; height: 48px;
    background: var(--sidebar-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--ma-radius-md);
    display: none;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 998;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

.mobile-menu-btn:hover {
    background: var(--ma-accent);
    transform: scale(1.05);
}

@media (max-width: 992px) { .mobile-menu-btn { display: flex; } }

/* ============================================
   Tooltip for Collapsed State
   ============================================ */
.v2-sidebar.collapsed .nav-link { position: relative; }

.v2-sidebar.collapsed .nav-link::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%; top: 50%;
    transform: translateY(-50%);
    margin-left: 1rem;
    padding: 0.5rem 1rem;
    background: var(--sidebar-bg);
    color: white;
    border: 1px solid var(--sidebar-border);
    border-radius: var(--ma-radius-sm);
    white-space: nowrap;
    opacity: 0; visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
    z-index: 1001;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.v2-sidebar.collapsed .nav-link:hover::after { opacity: 1; visibility: visible; }