/* =====================================
   ImageShare - Layout Styles
   ===================================== */

/* Navbar */
.navbar {
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-navbar);
}

.navbar-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.navbar-link {
    color: var(--text-primary);
    font-weight: 600;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar-link:hover {
    color: var(--primary);
}

.navbar-search {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.navbar-search input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-light);
    border: 2px solid var(--border);
    border-radius: var(--radius-full);
}

.navbar-search input:focus {
    background-color: var(--bg-white);
    border-color: var(--primary);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--bg-light);
    border-right: 1px solid var(--border);
    padding: var(--spacing-lg);
    min-height: calc(100vh - 64px);
    position: sticky;
    top: 64px;
}

.sidebar-section {
    margin-bottom: var(--spacing-lg);
}

.sidebar-title {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.sidebar-item:hover {
    background-color: var(--bg-white);
    color: var(--primary);
}

.sidebar-item.active {
    background-color: var(--primary);
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-lg);
    background-color: var(--bg-white);
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-2xl);
}

.page-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0;
}

/* Layout Container */
.app-container {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

.app-body {
    display: flex;
    flex: 1;
}

/* Masonry Grid */
.masonry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    auto-rows: auto;
}

.masonry-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.masonry-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.masonry-item img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition);
}

.masonry-item:hover img {
    transform: scale(1.05);
}

.masonry-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.8));
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-lg);
}

.masonry-item:hover .masonry-overlay {
    opacity: 1;
}

.masonry-info {
    color: white;
    width: 100%;
}

.masonry-title {
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.masonry-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.masonry-user {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.masonry-avatar {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    object-fit: cover;
}

/* FAB - Floating Action Button */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    border: none;
    z-index: 999;
}

.fab:hover {
    background-color: var(--primary-dark);
    transform: scale(1.1);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* Dropdowns */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    min-width: 200px;
    overflow: hidden;
}

.dropdown.active .dropdown-menu {
    display: block;
}

.dropdown-item {
    padding: var(--spacing-md) var(--spacing-lg);
    display: block;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition-fast);
    text-decoration: none;
}

.dropdown-item:hover {
    background-color: var(--bg-light);
    color: var(--primary);
}

/* Loading Animation */
.spinner {
    border: 4px solid var(--bg-light);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    max-width: 400px;
}

.toast {
    background-color: var(--bg-white);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
}

.toast.success {
    border-color: var(--success);
}

.toast.error {
    border-color: var(--error);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-menu {
        gap: var(--spacing-md);
    }
    
    .navbar-search {
        max-width: 200px;
    }
    
    .sidebar {
        display: none;
    }
    
    .app-body {
        flex-direction: column;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .masonry-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
    
    .fab {
        bottom: 1rem;
        right: 1rem;
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
    
    .modal-content {
        width: 95%;
    }
}