/* ============ SIDEBAR NAVIGATION ============ */
.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    height: 100vh;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 100%);
    border-right: 1px solid var(--accent-glow, rgba(6, 63, 102, 0.15));
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.app-sidebar.collapsed {
    width: 60px;
}

.app-sidebar .sidebar-header {
    padding: 18px 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 62px;
}

.app-sidebar .sidebar-logo {
    font-size: 22px;
    color: var(--accent);
    flex-shrink: 0;
}

.app-sidebar .sidebar-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
    overflow: hidden;
    opacity: 1;
    transition: opacity 0.2s;
}

.app-sidebar .sidebar-title span {
    display: block;
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 400;
    margin-top: 2px;
}

.app-sidebar.collapsed .sidebar-title {
    opacity: 0;
    width: 0;
}

.app-sidebar .sidebar-toggle {
    position: absolute;
    top: 18px;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
    transition: color 0.2s;
}

.app-sidebar .sidebar-toggle:hover {
    color: var(--accent);
}

.app-sidebar .theme-toggle {
    position: absolute;
    top: 18px;
    right: 40px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    padding: 4px;
    transition: color 0.2s;
}

.app-sidebar .theme-toggle:hover {
    color: var(--accent);
}

.app-sidebar.collapsed .sidebar-toggle {
    right: 50%;
    transform: translateX(50%);
}

.app-sidebar.collapsed .theme-toggle {
    display: none;
}

.app-sidebar .sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 0;
}

.app-sidebar .sidebar-nav::-webkit-scrollbar {
    width: 3px;
}

.app-sidebar .sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--accent-glow, rgba(6, 63, 102, 0.2));
    border-radius: 3px;
}

.app-sidebar .nav-group-label {
    padding: 12px 16px 4px;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    white-space: nowrap;
    overflow: hidden;
    opacity: 1;
    transition: opacity 0.2s;
}

.app-sidebar.collapsed .nav-group-label {
    opacity: 0;
    height: 0;
    padding: 0;
    overflow: hidden;
}

/* Collapsible group */
.nav-group-label.collapsible {
    cursor: pointer;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-group-label.collapsible:hover {
    color: var(--accent, var(--accent));
}

.nav-group-label .chevron {
    font-size: 9px;
    transition: transform 0.2s ease;
}

.nav-group-label.collapsed .chevron {
    transform: rotate(-90deg);
}

.nav-group-items.collapsed {
    display: none;
}

.nav-group-separator {
    margin: 12px 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.app-sidebar .nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    white-space: nowrap;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    position: relative;
}

.app-sidebar .nav-item:hover {
    color: var(--primary);
    background: var(--accent-glow, rgba(6, 63, 102, 0.06));
    border-left-color: rgba(6, 63, 102, 0.3);
}

.app-sidebar .nav-item.active {
    color: var(--accent);
    background: var(--accent-glow, rgba(6, 63, 102, 0.08));
    border-left-color: var(--accent);
}

.app-sidebar .nav-item i {
    width: 20px;
    text-align: center;
    font-size: 15px;
    flex-shrink: 0;
}

.app-sidebar .nav-item .nav-label {
    overflow: hidden;
    opacity: 1;
    transition: opacity 0.2s;
}

.app-sidebar.collapsed .nav-item .nav-label {
    opacity: 0;
    width: 0;
}

.app-sidebar .nav-badge {
    background: var(--accent);
    color: var(--primary);
    font-size: 9px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: auto;
    flex-shrink: 0;
}

.app-sidebar .nav-badge.new {
    background: #2ed573;
}

.app-sidebar.collapsed .nav-badge {
    display: none;
}

/* Tooltip on collapsed sidebar */
.app-sidebar.collapsed .nav-item:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 60px;
    background: var(--bg-input);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    border: 1px solid var(--accent-glow, rgba(6, 63, 102, 0.15));
    z-index: 1001;
    pointer-events: none;
}

/* Main content shift */
.main-content {
    margin-left: 250px;
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-height: 100vh;
}

.sidebar-collapsed .main-content {
    margin-left: 60px;
}

/* Mobile hamburger */
.mobile-hamburger {
    display: none;
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1001;
    background: var(--bg-card);
    border: 1px solid var(--accent-glow, rgba(6, 63, 102, 0.15));
    border-radius: 8px;
    color: var(--accent);
    padding: 10px 12px;
    cursor: pointer;
    font-size: 18px;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

/* Animations */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeInUp 0.3s ease-out both;
}

.fade-in-delay-1 { animation-delay: 0.05s; }
.fade-in-delay-2 { animation-delay: 0.1s; }
.fade-in-delay-3 { animation-delay: 0.15s; }
.fade-in-delay-4 { animation-delay: 0.2s; }

/* Tab badges */
.tab-badge {
    background: var(--accent);
    color: var(--primary);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: 5px;
    display: inline-block;
    min-width: 18px;
    text-align: center;
}

/* Stat cards */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: border-color 0.2s, transform 0.2s;
}

.stat-card:hover {
    border-color: var(--accent-glow, rgba(6, 63, 102, 0.15));
    transform: translateY(-2px);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.stat-card .stat-icon.blue { background: rgba(0, 0, 0, 0.05); color: var(--accent); }
.stat-card .stat-icon.green { background: rgba(46, 213, 115, 0.1); color: #2ed573; }
.stat-card .stat-icon.orange { background: rgba(255, 165, 2, 0.1); color: #ffa502; }
.stat-card .stat-icon.red { background: rgba(255, 71, 87, 0.1); color: #ff4757; }
.stat-card .stat-icon.purple { background: rgba(165, 94, 234, 0.1); color: #a55eea; }

.stat-card .stat-info {
    flex: 1;
}

.stat-card .stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-card .stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .app-sidebar {
        transform: translateX(-100%);
        width: 250px !important;
    }

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

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

    .mobile-hamburger {
        display: block;
    }

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

    .stat-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stat-cards {
        grid-template-columns: 1fr;
    }
}