/* ============================================
   INFINITY OS - LAYOUT SYSTEM
   Header, Sidebar, Main Content Grid
   ============================================ */

/* ============================================
   HEADER LAYOUT
   ============================================ */

.infinity-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-lg));
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
    box-sizing: border-box;
    overflow: visible;
}

.header-container {
    height: 100%;
    padding: 0 var(--space-lg);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--space-lg);
    box-sizing: border-box;
}

/* LEFT: Company Branding */
.header-left {
    display: flex;
    align-items: center;
    min-width: 0;
    overflow: hidden;
    flex: 1;
}

.company-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: 0;
}

.logo-icon {
    color: var(--accent);
    filter: drop-shadow(var(--glow));
    flex-shrink: 0;
}

.company-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-shadow: var(--glow);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

/* CENTER: Widgets */
.header-center {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    min-width: 0;
    flex-shrink: 0;
}

.header-widget {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    flex-shrink: 0;
    height: 40px;
    box-sizing: border-box;
}

.widget-icon {
    color: var(--accent);
    opacity: 0.6;
}

.widget-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.widget-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.clock-widget {
    flex-direction: row;
    align-items: center;
}

.clock-widget .widget-value {
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    letter-spacing: 0.05em;
}

/* RIGHT: User Profile */
.header-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-md);
    min-width: 0;
    flex: 1;
}

.notification-btn {
    position: relative;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    box-sizing: border-box;
}

/* E6.89: Theme Toggle Button */
.theme-toggle-btn {
    position: relative;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.theme-toggle-btn:hover {
    color: var(--neon-cyan);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(0, 240, 255, 0.3);
}

.theme-toggle-btn .theme-icon-light {
    display: none;
}

[data-theme="light"] .theme-toggle-btn .theme-icon-dark {
    display: none;
}

[data-theme="light"] .theme-toggle-btn .theme-icon-light {
    display: block;
}

/* PHASE 3: 4-Theme Switcher */
.theme-switcher-container {
    position: relative;
}

.theme-switcher-btn {
    position: relative;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    box-sizing: border-box;
}

.theme-switcher-btn:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-strong);
}

.theme-switcher-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--surface-2);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-xs);
    min-width: 180px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 130;
}

.theme-switcher-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-option {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-option:hover {
    background: rgba(255, 255, 255, 0.05);
}

.theme-option.active {
    background: color-mix(in srgb, var(--accent) 15%, transparent);
    border-left: 3px solid var(--accent);
    padding-left: calc(var(--space-md) - 3px);
}

.theme-preview {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.theme-name {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

.theme-option.active .theme-name {
    color: var(--accent);
}

/* E6.89: Button Group Active State */
.btn-group {
    display: inline-flex;
}

.btn-group .infinity-btn {
    border-width: 1px;
    margin: 0;
}

.btn-group .infinity-btn.btn-active {
    background: color-mix(in srgb, var(--accent) 20%, transparent);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 600;
}

.notification-btn:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--neon-magenta);
    color: var(--text-primary);
    font-size: 0.625rem;
    font-weight: 700;
    padding: 2px 5px;
    border-radius: 10px;
    min-width: 16px;
    text-align: center;
    box-shadow: var(--glow-magenta);
}

.user-menu-container {
    position: relative;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    background: transparent;
    border: none;
    color: inherit;
    min-height: 40px;
    box-sizing: border-box;
}

.user-profile:hover {
    background: rgba(255, 255, 255, 0.05);
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 120px;
}

.avatar-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: var(--glow);
}

.avatar-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-initials {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* User Menu Dropdown */
.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    z-index: 110;
}

.user-menu-container:hover .user-menu-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background var(--transition-fast);
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.dropdown-item.text-danger {
    color: var(--neon-magenta);
}

.dropdown-item.text-danger:hover {
    background: rgba(255, 51, 153, 0.1);
}

.dropdown-icon {
    color: inherit;
    flex-shrink: 0;
}

/* ============================================
   SIDEBAR LAYOUT
   ============================================ */

.infinity-sidebar {
    position: fixed;
    top: 64px;
    left: 0;
    width: 220px;
    height: calc(100vh - 64px);
    background: var(--panel);
    backdrop-filter: blur(var(--blur-lg));
    border-right: 1px solid var(--border);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 90;
    transition: transform var(--transition-base);
}

.sidebar-nav {
    padding: var(--space-xl) 0;
}

.nav-section {
    margin-bottom: calc(var(--space-xl) + var(--space-md));
}

.nav-section-title {
    padding: 0 var(--space-lg);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-tertiary);
    margin-bottom: var(--space-md);
}

.nav-list {
    list-style: none;
}

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

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    position: relative;
    border-radius: var(--radius-sm);
    text-decoration: none;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--accent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.nav-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.nav-link.active::before {
    opacity: 1;
    box-shadow: var(--glow-strong);
}

.nav-icon {
    color: inherit;
    flex-shrink: 0;
}

.nav-text {
    font-size: 0.875rem;
    font-weight: 500;
}

.sidebar-toggle {
    position: absolute;
    bottom: var(--space-lg);
    right: var(--space-lg);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    color: var(--accent);
    box-shadow: var(--glow);
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */

.main-content {
    margin-top: 64px;
    margin-left: 220px;
    padding: calc(var(--space-2xl) + var(--space-sm));
    min-height: calc(100vh - 64px);
    position: relative;
    z-index: 1;
}

/* ============================================
   RESPONSIVE SIDEBAR
   ============================================ */

body.sidebar-collapsed .infinity-sidebar {
    transform: translateX(-220px);
}

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

/* ============================================
   SLIDE OVER PANEL
   ============================================ */

.slide-over {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 200;
    pointer-events: none;
}

.slide-over.active {
    pointer-events: all;
}

.slide-over-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.slide-over.active .slide-over-backdrop {
    opacity: 1;
}

.slide-over-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 480px;
    height: 100%;
    background: var(--panel);
    border-left: 1px solid var(--border);
    box-shadow: -2px 0 12px rgba(0, 0, 0, 0.3);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    display: flex;
    flex-direction: column;
}

.slide-over.active .slide-over-panel {
    transform: translateX(0);
}

.slide-over-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--glass-border);
}

.slide-over-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.slide-over-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.slide-over-close:hover {
    color: var(--accent);
    background: rgba(255, 255, 255, 0.05);
}

.slide-over-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
}

/* ============================================
   MESSENGER
   ============================================ */

.messenger {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: 150;
}

.messenger-toggle {
    position: relative;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: var(--glow);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.messenger-toggle:hover {
    transform: scale(1.05);
    box-shadow: var(--glow-strong);
}

.messenger-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--neon-green);
    color: var(--bg-primary);
    font-size: 0.625rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.messenger-panel {
    position: absolute;
    bottom: 72px;
    right: 0;
    width: 360px;
    height: 480px;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    display: none;
    flex-direction: column;
}

.messenger.active .messenger-panel {
    display: flex;
}

.messenger-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    border-bottom: 1px solid var(--glass-border);
}

.messenger-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.messenger-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    transition: color var(--transition-fast);
}

.messenger-close:hover {
    color: var(--accent);
}

.messenger-tabs {
    display: flex;
    border-bottom: 1px solid var(--glass-border);
}

.messenger-tab {
    flex: 1;
    padding: var(--space-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.messenger-tab.active {
    color: var(--accent);
}

.messenger-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent);
    box-shadow: var(--glow);
}

.messenger-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
}

.messenger-input {
    padding: var(--space-md);
    border-top: 1px solid var(--glass-border);
}

.messenger-search {
    width: 100%;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    transition: all var(--transition-fast);
}

.messenger-search:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 10%, transparent);
}

/* ============================================
   BOTTOM NAVIGATION (Mobile)
   ============================================ */

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--panel);
    backdrop-filter: blur(var(--blur-lg));
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: none;
    justify-content: space-around;
    align-items: center;
    padding: 0 var(--space-md);
    z-index: 100;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm);
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
    flex: 1;
    max-width: 80px;
}

.bottom-nav-item.active,
.bottom-nav-item:hover {
    color: var(--text-secondary);
}

.bottom-nav-icon {
    color: inherit;
}

.bottom-nav-label {
    font-size: 0.625rem;
    font-weight: 500;
}