/* SocialHub Layout CSS - Core Shell & Responsive Grid */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-base);
    color: var(--color-text-primary);
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    min-height: 100vh;
}

/* App Shell Wrapper */
.app-container {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: var(--header-height) 1fr;
    grid-template-areas: 
        "sidebar header"
        "sidebar main";
    min-height: 100vh;
    width: 100%;
}

/* Sidebar Area */
app-sidebar {
    grid-area: sidebar;
    z-index: 100;
}

/* Header Area */
app-header {
    grid-area: header;
    z-index: 90;
    position: sticky;
    top: 0;
}

/* Main Content Container */
.main-content {
    grid-area: main;
    padding: 2rem 2.5rem;
    max-width: var(--max-content-width);
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    overflow-y: auto;
}

/* Page Headers (e.g. Page Title + Actions Row) */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.page-title-section {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.page-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.025em;
    color: var(--color-text-primary);
}

.page-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.page-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Dashboard Grid Structures */
.dashboard-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.dashboard-main-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.two-col-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

/* Sidebar Element Styles */
.sidebar-wrapper {
    background: var(--color-bg-sidebar);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--color-border);
    height: 100vh;
    width: var(--sidebar-width);
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
    transition: width var(--transition-normal), background-color var(--transition-normal);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    margin-bottom: 2rem;
}

.mobile-close-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0;
    border-radius: var(--radius-full);
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    width: 48px;
    height: 48px;
    z-index: 10;
}

.mobile-close-btn:hover {
    background-color: var(--color-bg-accent);
    color: var(--color-text-primary);
}

.brand-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-xs);
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-item svg {
    flex-shrink: 0;
    transition: stroke var(--transition-fast);
}

.nav-item:hover {
    background: var(--color-bg-accent);
    color: var(--color-text-primary);
}

.nav-item.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.nav-item.active svg {
    stroke: var(--color-primary);
}

.sidebar-footer {
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

.user-avatar-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.25rem 0.5rem;
}

.avatar-holder {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    background: var(--color-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-info {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
}

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

/* Header Wrapper Styles */
.header-wrapper {
    height: var(--header-height);
    background: var(--color-bg-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--color-border);
    padding: 0 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    transition: background-color var(--transition-normal);
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    padding: 0;
    border-radius: var(--radius-full);
    transition: background-color var(--transition-fast);
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
}

.mobile-nav-toggle:hover {
    background-color: var(--color-bg-accent);
}

.header-search {
    position: relative;
    display: flex;
    align-items: center;
    width: 320px;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    color: var(--color-text-tertiary);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 0.5rem 0.75rem 0.5rem 2.25rem;
    font-family: var(--font-body);
    font-size: 0.875rem;
    border-radius: var(--radius-xs);
    border: 1px solid var(--color-border);
    background: var(--color-bg-input);
    color: var(--color-text-primary);
    outline: none;
    transition: all var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
    background: var(--color-bg-base);
}

.header-action-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition-fast);
}

.header-action-btn:hover {
    background-color: var(--color-bg-accent);
    color: var(--color-text-primary);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 8px;
    height: 8px;
    background-color: var(--color-danger);
    border-radius: 50%;
    border: 2px solid var(--color-bg-surface);
}

.header-divider {
    height: 24px;
    width: 1px;
    background-color: var(--color-border);
}

.header-profile-trigger {
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: transform var(--transition-fast);
}

.header-profile-trigger:hover {
    transform: scale(1.05);
}

/* Light/Dark Toggle Icon Visibility */
[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
:root:not([data-theme="dark"]) .sun-icon { display: none; }
:root:not([data-theme="dark"]) .moon-icon { display: block; }

/* Responsive Breakpoints */

/* Tablet & Smaller Screens */
@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: var(--sidebar-collapsed-width) 1fr;
    }
    
    .sidebar-wrapper {
        width: var(--sidebar-collapsed-width);
        align-items: center;
        padding: 1.5rem 0.5rem;
    }

    .brand-name, .nav-label, .user-info, .sidebar-footer {
        display: none;
    }
    
    .dashboard-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-main-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile Screens */
@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
        grid-template-rows: var(--header-height) 1fr;
        grid-template-areas: 
            "header"
            "main";
    }
    
    app-sidebar {
        position: fixed;
        top: 0;
        left: -260px;
        height: 100vh;
        width: 260px;
        transition: left var(--transition-normal);
        grid-area: unset;
        display: block;
        z-index: 100;
    }

    .sidebar-wrapper {
        position: static;
        height: 100%;
        width: 100%;
        align-items: stretch;
        padding: 1.5rem 1rem;
    }

    .brand-name, .nav-label, .user-info, .sidebar-footer {
        display: flex;
    }
    
    app-sidebar.active {
        left: 0;
    }
    
    .mobile-nav-toggle {
        display: flex;
    }

    .mobile-close-btn {
        display: flex;
    }

    .header-wrapper {
        padding: 0 1.25rem;
    }

    .header-search {
        display: none; /* Hide search bar on mobile headers */
    }

    .main-content {
        padding: 1.5rem 1.25rem;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .page-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .dashboard-metrics-grid {
        grid-template-columns: 1fr;
    }

    .two-col-grid {
        grid-template-columns: 1fr;
    }
}