/* ==================== Modern Corporate Sidebar ==================== */

:root {
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --sidebar-bg: #1a1a2e;
    --sidebar-bg-hover: #16213e;
    --sidebar-text: #a4a6b3;
    --sidebar-text-active: #ffffff;
    --sidebar-accent: #0071E3;
    --sidebar-accent-hover: #0077ED;
    --sidebar-border: rgba(255, 255, 255, 0.08);
    --sidebar-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --header-height: 64px;
}

/* Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--sidebar-transition), width var(--sidebar-transition);
}

.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--sidebar-transition);
}

/* Sidebar Header */
.sidebar-header {
    height: var(--header-height);
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--sidebar-accent), #00c6ff);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-brand-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--sidebar-text-active);
    white-space: nowrap;
}

.sidebar-brand-subtitle {
    font-size: 11px;
    color: var(--sidebar-text);
    white-space: nowrap;
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--sidebar-border);
    border-radius: 4px;
}

.sidebar-section {
    margin-bottom: 24px;
}

.sidebar-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--sidebar-text);
    padding: 0 12px;
    margin-bottom: 8px;
    opacity: 0.7;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s ease;
    margin-bottom: 2px;
    position: relative;
    white-space: nowrap;
}

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

.sidebar-link.active {
    background: rgba(0, 113, 227, 0.15);
    color: var(--sidebar-accent);
}

.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--sidebar-accent);
    border-radius: 0 3px 3px 0;
}

.sidebar-link-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.sidebar-link-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-link-badge {
    background: var(--sidebar-accent);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* User Section */
.sidebar-user {
    padding: 16px;
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s ease;
}

.sidebar-user-info:hover {
    background: var(--sidebar-bg-hover);
}

.sidebar-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--sidebar-accent), #00c6ff);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

.sidebar-user-details {
    flex: 1;
    overflow: hidden;
}

.sidebar-user-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--sidebar-text-active);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    font-size: 12px;
    color: var(--sidebar-text);
    white-space: nowrap;
}

.sidebar-user-menu {
    color: var(--sidebar-text);
    transition: color 0.15s ease;
}

.sidebar-user-info:hover .sidebar-user-menu {
    color: var(--sidebar-text-active);
}

/* User Dropdown */
.sidebar-dropdown {
    position: absolute;
    bottom: 80px;
    left: 16px;
    right: 16px;
    background: #252542;
    border-radius: 10px;
    padding: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    display: none;
    z-index: 110;
}

.sidebar-dropdown.show {
    display: block;
    animation: dropdown-appear 0.2s ease;
}

@keyframes dropdown-appear {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sidebar-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 6px;
    color: var(--sidebar-text);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sidebar-dropdown-item:hover {
    background: var(--sidebar-bg-hover);
    color: var(--sidebar-text-active);
}

.sidebar-dropdown-item.danger:hover {
    background: rgba(255, 59, 48, 0.15);
    color: #FF3B30;
}

/* Mobile Header */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid #E5E5EA;
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
    z-index: 90;
}

.mobile-menu-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: #F5F5F7;
    color: #1D1D1F;
    border: none;
    cursor: pointer;
    transition: background 0.15s ease;
}

.mobile-menu-btn:hover {
    background: #E5E5EA;
}

.mobile-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--sidebar-accent), #00c6ff);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 14px;
}

.mobile-logo-text {
    font-size: 16px;
    font-weight: 600;
    color: #1D1D1F;
}

/* Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 95;
    opacity: 0;
    transition: opacity var(--sidebar-transition);
}

.sidebar-overlay.show {
    display: block;
    opacity: 1;
}

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

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

.app-sidebar.collapsed .sidebar-brand,
.app-sidebar.collapsed .sidebar-section-title,
.app-sidebar.collapsed .sidebar-link-text,
.app-sidebar.collapsed .sidebar-link-badge,
.app-sidebar.collapsed .sidebar-user-details,
.app-sidebar.collapsed .sidebar-user-menu {
    display: none;
}

.app-sidebar.collapsed .sidebar-link {
    justify-content: center;
    padding: 12px;
}

.app-sidebar.collapsed .sidebar-link.active::before {
    display: none;
}

.app-sidebar.collapsed .sidebar-user-info {
    justify-content: center;
    padding: 8px;
}

.app-sidebar.collapsed .sidebar-dropdown {
    left: var(--sidebar-collapsed-width);
    bottom: 16px;
    width: 200px;
}

/* Collapse Toggle */
.sidebar-collapse-btn {
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background: var(--sidebar-bg);
    border: 2px solid var(--sidebar-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sidebar-text);
    cursor: pointer;
    transition: all 0.15s ease;
    z-index: 10;
}

.sidebar-collapse-btn:hover {
    background: var(--sidebar-bg-hover);
    color: var(--sidebar-text-active);
    border-color: var(--sidebar-accent);
}

.app-sidebar.collapsed .sidebar-collapse-btn {
    transform: translateY(-50%) rotate(180deg);
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar-collapse-btn {
        display: none;
    }
}

@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }
    
    .app-sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    
    .app-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .app-main {
        margin-left: 0;
        padding-top: var(--header-height);
    }
    
    .sidebar-collapse-btn {
        display: none;
    }
}

/* Page Content Wrapper */
.page-content {
    padding: 24px;
    max-width: 1400px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .page-content {
        padding: 16px;
    }
}

/* Status Indicators */
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #34C759;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Tooltip for collapsed state */
.sidebar-link[data-tooltip] {
    position: relative;
}

.app-sidebar.collapsed .sidebar-link::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%);
    background: #252542;
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.15s ease;
    pointer-events: none;
    z-index: 1000;
}

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