/* ==========================================================================
   CSS Custom Properties for Theming
   ========================================================================== */

/* Default theme (can be overridden by user preference or OS) */
:root {
    /* Spacing (theme-independent) */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
}

/* Dark Theme (default) */
:root,
:root[data-theme="dark"] {
    /* Background colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2a2a2a;
    --bg-card: #606060;
    --bg-hover: #505050;
    --header-bg: #606060;  /* Keep matching card background for dark theme */

    /* Text colors */
    --text-primary: #e0e0e0;
    --text-secondary: #b8b8b8;
    --text-muted: #ccc;
    --text-tertiary: #a0a0a0;
    --text-quaternary: #8a8a8a;
    --text-light: #bbb;
    --text-white: white;

    /* Link colors */
    --link-color: #66b3ff;
    --link-hover: #99ccff;

    /* Border colors */
    --border-color: #555;
    --border-hover: #777;

    /* Accent colors */
    --accent-red: #ff6b6b;
    --bg-button-hover: #666;
    
    /* Button disabled states */
    --btn-disabled-bg: #6a6a6a;
    --btn-disabled-color: #a0a0a0;
    --btn-disabled-border: #6a6a6a;
    
    /* Danger button colors */
    --btn-danger-bg: var(--message-error-color);
    --btn-danger-hover: #c82333;

    /* Message colors */
    --message-info-bg: rgba(23, 162, 184, 0.1);
    --message-info-color: #17a2b8;
    --message-info-border: rgba(23, 162, 184, 0.3);
    --message-success-bg: rgba(40, 167, 69, 0.1);
    --message-success-color: #28a745;
    --message-success-border: rgba(40, 167, 69, 0.3);
    --message-error-bg: rgba(220, 53, 69, 0.1);
    --message-error-color: #dc3545;
    --message-error-border: rgba(220, 53, 69, 0.3);

    /* Code block colors */
    --code-bg: #2d2d2d;
    --code-text: #f8f8f2;
    --code-border: #444;
    --code-inline-bg: #3a3a3a;
    --code-inline-text: #f8f8f2;

    /* Shadow colors */
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-light: rgba(0, 0, 0, 0.3);
    --header-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* Light Theme */
:root[data-theme="light"] {
    /* Background colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --bg-hover: #e9ecef;
    --header-bg: #f0f4f8;  /* Light blue-gray for header */

    /* Text colors */
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #6c757d;
    --text-tertiary: #6c757d;
    --text-quaternary: #adb5bd;
    --text-light: #6c757d;
    --text-white: #ffffff;

    /* Link colors */
    --link-color: #0d6efd;
    --link-hover: #0a58ca;

    /* Border colors */
    --border-color: #dee2e6;
    --border-hover: #adb5bd;

    /* Accent colors */
    --accent-red: #dc3545;
    --bg-button-hover: #e9ecef;
    
    /* Button disabled states */
    --btn-disabled-bg: #e9ecef;
    --btn-disabled-color: #6c757d;
    --btn-disabled-border: #dee2e6;
    
    /* Danger button colors */
    --btn-danger-bg: var(--message-error-color);
    --btn-danger-hover: #b02a37;

    /* Message colors */
    --message-info-bg: rgba(13, 202, 240, 0.1);
    --message-info-color: #055160;
    --message-info-border: rgba(13, 202, 240, 0.25);
    --message-success-bg: rgba(25, 135, 84, 0.1);
    --message-success-color: #0a3622;
    --message-success-border: rgba(25, 135, 84, 0.25);
    --message-error-bg: rgba(220, 53, 69, 0.1);
    --message-error-color: #58151c;
    --message-error-border: rgba(220, 53, 69, 0.25);

    /* Code block colors */
    --code-bg: #f8f9fa;
    --code-text: #212529;
    --code-border: #dee2e6;
    --code-inline-bg: #e9ecef;
    --code-inline-text: #495057;

    /* Shadow colors */
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-light: rgba(0, 0, 0, 0.05);
    --header-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Auto theme based on OS preference (when no manual preference is set) */
:root:not([data-theme]) {
    color-scheme: light dark;
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        /* Light theme variables (same as above) */
        --bg-primary: #ffffff;
        --bg-secondary: #f8f9fa;
        --bg-card: #ffffff;
        --bg-hover: #e9ecef;
        --text-primary: #212529;
        --text-secondary: #6c757d;
        --text-muted: #6c757d;
        --text-tertiary: #6c757d;
        --text-quaternary: #adb5bd;
        --text-light: #6c757d;
        --text-white: #ffffff;
        --link-color: #0d6efd;
        --link-hover: #0a58ca;
        --border-color: #dee2e6;
        --border-hover: #adb5bd;
        --accent-red: #dc3545;
        --bg-button-hover: #e9ecef;
        --btn-disabled-bg: #e9ecef;
        --btn-disabled-color: #6c757d;
        --btn-disabled-border: #dee2e6;
        --btn-danger-bg: var(--message-error-color);
        --btn-danger-hover: #b02a37;
        --message-info-bg: rgba(13, 202, 240, 0.1);
        --message-info-color: #055160;
        --message-info-border: rgba(13, 202, 240, 0.25);
        --message-success-bg: rgba(25, 135, 84, 0.1);
        --message-success-color: #0a3622;
        --message-success-border: rgba(25, 135, 84, 0.25);
        --message-error-bg: rgba(220, 53, 69, 0.1);
        --message-error-color: #58151c;
        --message-error-border: rgba(220, 53, 69, 0.25);
        --code-bg: #f8f9fa;
        --code-text: #212529;
        --code-border: #dee2e6;
        --code-inline-bg: #e9ecef;
        --code-inline-text: #495057;
        --shadow-medium: rgba(0, 0, 0, 0.1);
        --shadow-light: rgba(0, 0, 0, 0.05);
        --header-bg: #f0f4f8;
        --header-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    }
}


body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

header {
    background-color: var(--header-bg);
    color: var(--text-primary);
    padding: 0.5rem 0;
    box-shadow: var(--header-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
}

nav h1 {
    margin: 0;
    font-size: 1.25rem;
}

nav h1 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: opacity 0.3s;
}

nav h1 a:hover {
    opacity: 0.8;
}

nav ul {
    list-style: none;
    margin: 0 0 0 auto;
    padding: 0;
    display: flex;
    gap: 1.5rem;
    font-size: 0.9rem;
}

nav a {
    color: var(--text-primary);
    text-decoration: none;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

main {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 1rem;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-medium);
    /* iOS-specific fixes */
    width: calc(100% - 2rem);
    box-sizing: border-box;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature {
    padding: 1.5rem;
    background-color: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.feature h4 {
    margin-top: 0;
    color: var(--text-primary);
}

footer {
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    text-align: left;
    padding: 1rem;
    margin-top: auto;
}

footer p {
    margin: 0;
    font-size: 0.875rem;
}

/* Gallery Styles */
.gallery-container {
    max-width: 1400px;
    background-color: var(--bg-primary);
    /* iOS-specific fixes for centering */
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

/* Gallery headings alignment */
.gallery-container h2,
.gallery-container h3 {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1rem;
    box-sizing: border-box;
}

.gallery-nav {
    margin-bottom: 1.5rem;
    padding: 0.75rem;
    border-bottom: 1px solid var(--bg-card);
    border-top: 1px solid var(--bg-card);
    font-size: 0.9rem;
    display: block;
    width: 100%;
    max-width: 1400px;
    position: sticky;
    top: 45px;
    /* Adjust based on header height */
    background-color: var(--bg-primary);
    z-index: 100;
    margin-top: 0;
}

.nav-link {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.nav-separator {
    color: var(--text-quaternary);
    margin: 0 0.5rem;
}

.nav-current {
    color: var(--text-primary);
    font-weight: 500;
}

.folder-description {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 8px;
    color: var(--text-primary);
    line-height: 1.6;
    /* position: sticky; */
    top: 100px;
    /* Adjust based on header + nav height */
    z-index: 90;
}

.folder-description h1,
.folder-description h2,
.folder-description h3,
.folder-description h4,
.folder-description h5,
.folder-description h6 {
    color: var(--text-primary);
}

.folder-description p {
    margin-bottom: 1rem;
}

.folder-description p:last-child {
    margin-bottom: 0;
}

.folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.folder-item {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
}

.folder-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.folder-preview {
    width: 100%;
    height: 160px;
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.folder-icon {
    font-size: 3rem;
    color: var(--text-tertiary);
}

.preview-images {
    position: relative;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 2px;
}

.preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.3s;
}

.preview-img:only-child {
    grid-column: 1 / -1;
    grid-row: 1 / -1;
}

.preview-images:has(.preview-img:nth-child(2):last-child) .preview-img {
    grid-row: 1 / -1;
}

.preview-images:has(.preview-img:nth-child(3):last-child) .preview-img:first-child {
    grid-column: 1 / -1;
}

.preview-img-1 {
    z-index: 4;
}

.preview-img-2 {
    z-index: 3;
}

.preview-img-3 {
    z-index: 2;
}

.preview-img-4 {
    z-index: 1;
}

.folder-info {
    padding: 1rem;
    text-align: center;
}

.folder-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
}

.folder-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.folder-description-preview {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.5rem;
    line-height: 1.3;
}

.image-grid {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    /* iOS-specific fixes */
    width: 100%;
    box-sizing: border-box;
    padding: 0 1rem;
}

/* Desktop-specific padding override */
@media (min-width: 769px) {
    .image-grid {
        padding: 0 1rem;
    }
}

.masonry-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-width: 0;
}

.image-item {
    position: relative;
    background: var(--bg-card);
    border-radius: 0;
    overflow: hidden;
    transition: transform 0.2s;
    display: block;
}

.image-item:hover {
    transform: scale(1.02);
}

/* New image highlighting */
.image-item.is-new {
    position: relative;
}

.image-item.is-new::before {
    content: "NEW";
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--accent-red);
    color: var(--text-white);
    padding: 4px 8px;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    z-index: 10;
    box-shadow: 0 2px 4px var(--shadow-light);
}

.image-link {
    display: block;
    position: relative;
    width: 100%;
    height: 100%;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.gallery-image-container {
    width: 100%;
    height: 100%;
    display: block;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    pointer-events: auto;
}

/* Legacy img styles for backward compatibility */
.image-item img {
    width: 100%;
    height: auto;
    display: block;
    pointer-events: none;
    -webkit-user-drag: none;
}

/* Image metadata badges */
.image-badges {
    position: absolute;
    bottom: 8px;
    left: 8px;
    right: 8px;
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    pointer-events: none;
}

.image-badge {
    background: rgba(0, 0, 0, 0.75);
    color: var(--text-white);
    padding: 4px 8px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    backdrop-filter: blur(4px);
}

/* Specific badge types */
.badge-comments {
    background: rgba(33, 150, 243, 0.85);
}

.badge-highlighted {
    background: rgba(255, 193, 7, 0.85);
}

.badge-pick {
    background: rgba(76, 175, 80, 0.85);
}

.badge-reject {
    background: rgba(244, 67, 54, 0.85);
}

.badge-undecided {
    background: rgba(158, 158, 158, 0.85);
}

.badge-tags {
    background: rgba(156, 39, 176, 0.85);
}

.gallery-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 3rem;
    padding: 2rem 0;
}

.page-link {
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s;
}

.page-link:hover {
    background: var(--border-color);
}

.page-info {
    font-weight: 500;
}

.empty-gallery {
    text-align: center;
    padding: 4rem 0;
    color: var(--text-secondary);
}

/* Gallery Preview Component */
.gallery-preview-component {
    margin: 2rem 0;
}

.gallery-preview-component .preview-masonry {
    display: flex;
    gap: 1.5rem;
    /* iOS-specific fixes */
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
    padding: 0 1rem;
}

.gallery-preview-component .masonry-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    min-width: 0;
}

.gallery-preview-component .preview-item {
    background: var(--bg-card);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s, box-shadow 0.3s;
    display: block;
}

.gallery-preview-component .preview-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-medium);
}

.gallery-preview-component .preview-image {
    position: relative;
    overflow: hidden;
    background: transparent;
    display: block;
}

.gallery-preview-component .preview-image img {
    object-fit: cover;
    transition: transform 0.3s;
    display: block;
}

.gallery-preview-component .preview-item:hover .preview-image img {
    transform: scale(1.05);
}

/* New image highlighting in gallery preview */
.gallery-preview-component .preview-item.is-new {
    position: relative;
}

.gallery-preview-component .preview-item.is-new::before {
    content: "NEW";
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--accent-red);
    color: var(--text-white);
    padding: 4px 8px;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    z-index: 10;
    box-shadow: 0 2px 4px var(--shadow-light);
}

.gallery-preview-component .preview-footer {
    text-align: center;
    margin-top: 2rem;
}

.gallery-preview-component .btn-explore {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--border-color);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s;
}

.gallery-preview-component .btn-explore:hover {
    background: var(--bg-button-hover);
}

/* Mobile Styles */
@media (max-width: 768px) {
    nav {
        padding: 0 0.5rem;
    }

    main {
        padding: 1rem 0;
    }

    .container {
        width: calc(100% - 1rem);
        padding: 1rem 0.5rem;
        margin: 0 auto;
    }

    footer {
        padding: 1rem 0.5rem;
    }

    .gallery-container {
        padding: 0;
        margin: 0 auto;
        width: 100%;
    }

    .gallery-container h2,
    .gallery-container h3 {
        padding: 0 0.5rem;
    }

    .image-grid {
        flex-direction: column;
        gap: 1rem;
        padding: 0 0.5rem;
        width: 100%;
        margin: 0 auto;
        box-sizing: border-box;
        overflow-x: hidden;
    }

    .masonry-column[data-column="1"] {
        display: none;
    }

    .masonry-column {
        padding: 0 0.5rem;
        width: 100%;
        box-sizing: border-box;
    }

    .gallery-preview-component .preview-masonry {
        flex-direction: column;
        gap: 1rem;
        padding: 0 1rem;
        width: 100%;
        margin: 0 auto;
        box-sizing: border-box;
    }

    .gallery-preview-component .masonry-column {
        width: 100%;
        box-sizing: border-box;
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 0;
    }

    .gallery-preview-component .masonry-column[data-column="1"] {
        display: none;
    }

    .gallery-preview-component .preview-item {
        margin: 0 auto;
        width: auto;
        max-width: 100%;
    }

    .gallery-preview-component .preview-image {
        margin: 0 auto;
    }

    .gallery-preview-component .preview-image img {
        width: 100%;
        height: auto;
        display: block;
    }
}

/* iOS Safari specific fixes */
@supports (-webkit-touch-callout: none) {

    .container,
    .gallery-container,
    .image-grid,
    .gallery-preview-component .preview-masonry {
        -webkit-overflow-scrolling: touch;
        transform: translate3d(0, 0, 0);
        /* Hardware acceleration */
    }

    /* Safe area support for iOS devices with notches - but not for gallery containers */
    body {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }

    /* Moved to global code block styles */

    main {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }

    /* Override safe area for gallery on mobile to prevent excessive padding */
    @media (max-width: 768px) {

        .gallery-container,
        .image-grid {
            margin-left: calc(-1 * env(safe-area-inset-left));
            margin-right: calc(-1 * env(safe-area-inset-right));
            padding-left: env(safe-area-inset-left);
            padding-right: env(safe-area-inset-right);
        }

        .gallery-container .container {
            margin-left: 0;
            margin-right: 0;
            width: 100%;
        }

        main {
            padding-left: 0;
            padding-right: 0;
        }
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

/* Container widths */
.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.container-md {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

.container-lg {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* Card component */
.card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.card h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1.1rem;
}

/* ==========================================================================
   Common Components
   ========================================================================== */

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s;
    border: 1px solid transparent;
}

.btn:hover {
    background: var(--bg-hover);
}

.btn-primary {
    background: var(--link-color);
    color: var(--bg-primary);
}

.btn-primary:hover {
    background: var(--link-hover);
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: var(--link-hover);
}

/* Time/Date displays */
time {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Breadcrumbs */
.breadcrumbs {
    margin-bottom: var(--spacing-md);
}

.breadcrumbs a {
    color: var(--link-color);
    text-decoration: none;
    font-size: 0.9rem;
}

.breadcrumbs a:hover {
    text-decoration: underline;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.pagination a {
    color: var(--link-color);
    text-decoration: none;
}

.pagination a:hover {
    text-decoration: underline;
}

.page-info {
    color: var(--text-secondary);
}

/* Code blocks */
pre {
    background: var(--code-bg);
    color: var(--code-text);
    padding: var(--spacing-md);
    overflow-x: auto;
    border-radius: 4px;
    margin: var(--spacing-md) 0;
    border: 1px solid var(--code-border);
}

code {
    background: var(--code-inline-bg);
    color: var(--code-inline-text);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: 0.9em;
    line-height: 1.5;
}

/* Blockquotes */
blockquote {
    border-left: 4px solid var(--border-color);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-style: italic;
    color: var(--text-secondary);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
}

th,
td {
    border: 1px solid var(--border-color);
    padding: var(--spacing-sm);
    text-align: left;
}

th {
    background: var(--bg-card);
    color: var(--text-primary);
    font-weight: bold;
}

/* ==========================================================================
   Responsive Utilities
   ========================================================================== */
@media (max-width: 768px) {

    .container-sm,
    .container-md,
    .container-lg {
        padding: var(--spacing-md);
    }

    .hide-mobile {
        display: none;
    }
}

@media (min-width: 769px) {
    .show-mobile {
        display: none;
    }
}

/* ==========================================================================
   User Menu Styles
   ========================================================================== */
.user-menu {
    position: relative;
}

.user-menu-toggle {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    color: var(--text-primary);
    transition: opacity 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.user-menu-toggle:hover {
    opacity: 0.8;
}

.user-menu-toggle svg {
    width: 18px;
    height: 18px;
}

.user-menu-dropdown {
    position: absolute;
    top: 150%;
    right: -10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    min-width: 160px;
    box-shadow: 0 2px 8px var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px);
    transition: all 0.2s ease;
    z-index: 1000;
}

.user-menu-dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    right: 20px;
    width: 12px;
    height: 12px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    border-top: 1px solid var(--border-color);
    transform: rotate(45deg);
}

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

.user-menu-dropdown a {
    display: block;
    padding: 10px 14px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.2s ease;
    font-size: 0.85rem;
}

.user-menu-dropdown a:hover {
    background: var(--bg-hover);
}

.user-menu-dropdown a:first-child {
    border-radius: 5px 5px 0 0;
}

.user-menu-dropdown a:last-child {
    border-radius: 0 0 5px 5px;
}

.user-menu-dropdown a:only-child {
    border-radius: 5px;
}

.user-info {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.user-info .username {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.85rem;
    margin-top: 2px;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    nav ul {
        gap: 1rem;
        font-size: 0.85rem;
    }

    .user-menu-dropdown {
        right: -16px;
    }
}

/* ==========================================================================
   Toast Notification System
   ========================================================================== */

.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 12px;
    min-width: 300px;
    max-width: 400px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: space-between;
    pointer-events: auto;
    transform: translateX(100%);
    transition: all 0.3s ease-out;
    opacity: 0;
}

.toast-show {
    transform: translateX(0);
    opacity: 1;
}

.toast-hide {
    transform: translateX(100%);
    opacity: 0;
}

.toast-success {
    border-left: 4px solid var(--success-color);
    background: color-mix(in srgb, var(--success-color) 10%, var(--bg-card));
}

.toast-error {
    border-left: 4px solid var(--error-color);
    background: color-mix(in srgb, var(--error-color) 10%, var(--bg-card));
}

.toast-warning {
    border-left: 4px solid var(--warning-color);
    background: color-mix(in srgb, var(--warning-color) 10%, var(--bg-card));
}

.toast-info {
    border-left: 4px solid var(--link-color);
    background: color-mix(in srgb, var(--link-color) 10%, var(--bg-card));
}

.toast-content {
    flex: 1;
    font-size: 0.9rem;
    line-height: 1.4;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    margin-left: 12px;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.toast-close:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.1);
}

/* Mobile responsiveness for toasts */
@media (max-width: 768px) {
    .toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
    }

    .toast {
        min-width: auto;
        max-width: none;
        margin: 0 0 10px 0;
    }
}

/* ==========================================================================
   Theme Toggle Component
   ========================================================================== */
.theme-toggle {
    display: flex;
    align-items: center;
}

.theme-toggle-button {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 0.25rem;
    cursor: pointer;
    color: var(--text-primary);
    border-radius: 4px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    font-size: 0.9rem;
}

.theme-toggle-button:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

.theme-toggle-button:active {
    transform: scale(0.95);
}

.theme-toggle-button svg {
    width: 16px !important;
    height: 16px !important;
    display: block !important;
    fill: currentColor !important;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

/* Theme transition for smooth switching - target specific elements only */
body,
header,
main,
footer,
.container,
.card,
nav,
.btn,
.theme-toggle-button {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Disable transitions during theme change to prevent flash */
.theme-transitioning,
.theme-transitioning * {
    transition: none !important;
}