* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #10b981;
    --error: #ef4444;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--background) 0%, #1a1f3a 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 0;
    line-height: 1.6;
}

/* Top Header Bar */
.top-header-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 24px var(--shadow);
    padding: 0.75rem 0;
}

.header-container {
    width: 100%;
    padding: 0 1rem;
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    column-gap: 0.75rem;
}

.header-left {
    display: flex;
    align-items: center;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-fields-container {
    width: 100%;
    padding-top: 0;
}

.header-fields-container:has(.add-link-wrapper.show),
.header-fields-container:has(.search-wrapper.show) {
    padding-top: 0.75rem;
}

.app-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    transition: opacity 0.3s ease;
}

.app-title:hover {
    opacity: 0.8;
}

.title-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: contain;
    display: block;
    flex-shrink: 0;
}

.title-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-right {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: flex-end;
    max-width: 400px;
    gap: 0.75rem;
}

/* Layout Toggle Button */
.layout-toggle-wrapper {
    position: relative;
}

.layout-toggle-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.layout-toggle-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.layout-toggle-btn.active {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.layout-toggle-btn svg {
    width: 20px;
    height: 20px;
}

/* Layout Dropdown */
.layout-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 8px 24px var(--shadow-lg);
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 1000;
    overflow: hidden;
}

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

.layout-option {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.625rem 0.875rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.2s ease;
    text-align: left;
}

.layout-option:hover {
    background: var(--surface-light);
}

.layout-option.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.layout-option .check-icon {
    width: 16px;
    height: 16px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.layout-option.active .check-icon {
    opacity: 1;
}

.container {
    width: 100%;
    padding: 1.5rem 1rem;
}

/* Top Section - Removed since add link is in header now */

.section-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 400;
    margin: 0 0 1.5rem 0;
    opacity: 0.8;
}

/* Add Link Section */
.link-form {
    margin: 0;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--surface);
    padding: 0.375rem 0.625rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px var(--shadow);
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1), 0 4px 12px var(--shadow);
}

.input-icon {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: color 0.3s ease;
}

.input-wrapper:focus-within .input-icon {
    color: var(--primary-color);
}

#linkInput {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    padding: 0.5rem 0;
    outline: none;
    font-weight: 400;
}

#linkInput::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

.btn-add {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: 8px;
    font-size: 0;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    position: relative;
    flex-shrink: 0;
}

.btn-add .btn-text {
    display: none;
}

.btn-add::after {
    content: '+';
    font-size: 1.5rem;
    font-weight: 300;
    line-height: 1;
}

.btn-add::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-0.5rem);
    background: var(--surface);
    color: var(--text-primary);
    padding: 0.375rem 0.625rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 1000;
}

.btn-add:hover::before,
.btn-add:focus::before {
    opacity: 1;
    transform: translateX(-50%) translateY(-0.25rem);
}

/* Touch support for mobile */
@media (hover: none) and (pointer: coarse) {
    .btn-add:active::before {
        opacity: 1;
        transform: translateX(-50%) translateY(-0.25rem);
    }
}

.btn-add .btn-loader {
    width: 16px;
    height: 16px;
}

.btn-add:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-add:active:not(:disabled) {
    transform: translateY(0);
}

.btn-add:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-loader {
    display: none;
    align-items: center;
    justify-content: center;
}

.btn-loader svg {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Search Toggle Button */
.search-toggle-btn {
    display: flex;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
}

.search-toggle-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.search-toggle-btn.active {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.search-toggle-btn svg {
    width: 20px;
    height: 20px;
}

/* Login Toggle Button */
.login-toggle-btn {
    display: flex;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
}

.login-toggle-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.login-toggle-btn svg {
    width: 20px;
    height: 20px;
}

/* User Info */
.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--surface-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.user-info span {
    color: var(--text-primary);
}

.logout-btn {
    display: flex;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    align-items: center;
    justify-content: center;
}

.logout-btn:hover {
    background: var(--surface);
    color: var(--error);
}

.logout-btn svg {
    width: 16px;
    height: 16px;
}

/* Add Link Toggle Button */
.add-link-toggle-btn {
    display: flex;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
}

.add-link-toggle-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.add-link-toggle-btn.active {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.add-link-toggle-btn svg {
    width: 20px;
    height: 20px;
}

/* Add Link Wrapper in Header */
.add-link-wrapper {
    width: 100%;
    margin: 0;
    padding: 0;
    display: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.add-link-wrapper.show {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.add-link-wrapper .link-form {
    margin: 0;
    padding: 0;
}

.add-link-wrapper .input-wrapper {
    margin: 0 !important;
    background: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    padding: 0.625rem 1rem !important;
    border-radius: 12px !important;
    height: 44px !important;
    display: flex !important;
    align-items: center !important;
    gap: 0.75rem !important;
    box-shadow: none !important;
}

.add-link-wrapper .input-wrapper #linkInput {
    padding: 0 !important;
    line-height: 1.5 !important;
}

.add-link-wrapper .input-wrapper .btn-add {
    width: 32px !important;
    height: 32px !important;
    padding: 0.375rem !important;
    flex-shrink: 0 !important;
}

.add-link-wrapper .input-wrapper .btn-add::after {
    font-size: 1.25rem !important;
}

.add-link-wrapper .input-wrapper .btn-loader {
    width: 14px !important;
    height: 14px !important;
}

.add-link-wrapper .input-wrapper:focus-within {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Search in Header */
.search-wrapper {
    width: 100%;
    margin: 0;
    padding: 0.625rem 1rem;
    display: none;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(-10px);
}

.search-wrapper.show {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

.search-wrapper:focus-within {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-icon {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: color 0.3s ease;
}

.search-wrapper:focus-within .search-icon {
    color: var(--primary-color);
}

#searchInput {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.95rem;
    padding: 0;
    outline: none;
    font-weight: 400;
}

#searchInput::placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

/* Toast Container */
.toast-container {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
    align-items: flex-end;
}

.toast {
    padding: 0.875rem 1.25rem;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
    word-wrap: break-word;
    white-space: nowrap;
    width: fit-content;
    max-width: calc(100vw - 2rem);
}

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

.toast-success {
    background: rgba(16, 185, 129, 0.95);
    border: 1px solid var(--success);
    color: white;
}

.toast-error {
    background: rgba(239, 68, 68, 0.95);
    border: 1px solid var(--error);
    color: white;
}

.links-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    animation: fadeIn 1s ease-out;
}

/* Layout: Masonry */
.links-container.layout-masonry {
    display: block;
    column-count: auto;
    column-width: 280px;
    column-gap: 1.5rem;
    animation: fadeIn 1s ease-out;
}

.links-container.layout-masonry .link-card {
    display: inline-block;
    width: 100%;
    margin-bottom: 1.5rem;
    break-inside: avoid;
    page-break-inside: avoid;
    height: auto;
}

.links-container.layout-masonry .link-image {
    width: 100%;
    height: auto;
    min-height: 0;
}

.links-container.layout-masonry .link-image-link {
    width: 100%;
    height: auto;
    display: block;
}

.links-container.layout-masonry .link-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    max-height: 400px;
    display: block;
}

.links-container.layout-masonry .link-content {
    flex: 0 1 auto;
    padding: 1rem 1.25rem;
}

.links-container.layout-masonry .link-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    -webkit-line-clamp: 2;
}

.links-container.layout-masonry .link-description {
    display: none;
}

.links-container.layout-masonry .link-url {
    display: none;
}

.links-container.layout-masonry .link-footer {
    padding: 0.75rem 1.25rem;
}

.links-container.layout-masonry .empty-state {
    column-span: all;
}

/* Layout: Detail (default - current layout) */
.links-container.layout-detail {
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

/* Layout: List */
.links-container.layout-list {
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.links-container.layout-list .link-card {
    display: grid;
    grid-template-columns: 100px 1fr;
    grid-template-rows: 1fr auto;
    border-radius: 10px;
    padding: 0;
}

.links-container.layout-list .link-image {
    width: 100px;
    height: 100px;
    grid-column: 1;
    grid-row: 1;
    border-radius: 0;
}

.links-container.layout-list .link-content {
    padding: 0.75rem 1rem;
    grid-column: 2;
    grid-row: 1;
    display: flex;
    flex-direction: column;
}

.links-container.layout-list .link-title {
    font-size: 1rem;
    margin-bottom: 0.375rem;
    -webkit-line-clamp: 1;
}

.links-container.layout-list .link-description {
    font-size: 0.875rem;
    -webkit-line-clamp: 1;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.links-container.layout-list .link-url {
    font-size: 0.8rem;
    margin-bottom: 0.5rem;
}

.links-container.layout-list .link-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
}

.links-container.layout-list .link-date {
    font-size: 0.75rem;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.link-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px var(--shadow);
    display: flex;
    flex-direction: column;
    animation: fadeInUp 0.5s ease-out;
}

.link-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px var(--shadow-lg);
    border-color: var(--primary-color);
}

.link-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--surface-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    position: relative;
}

.link-image-link {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.link-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.link-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.link-card .link-footer {
    padding: 1rem 1.5rem;
}

.link-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.link-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.link-url {
    color: var(--primary-color);
    font-size: 0.85rem;
    text-decoration: none;
    margin-bottom: 1rem;
    word-break: break-all;
    transition: color 0.3s ease;
}

.link-url:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.link-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border);
}

.link-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.link-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.archive-btn,
.delete-btn {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 0.375rem;
    border-radius: 6px;
    font-size: 0;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    flex-shrink: 0;
}

.archive-btn svg,
.delete-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2;
}

.archive-btn {
    color: var(--secondary-color);
    border-color: rgba(139, 92, 246, 0.3);
}

.archive-btn:hover {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.delete-btn {
    color: var(--error);
    border-color: rgba(239, 68, 68, 0.3);
}

.delete-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--error);
    color: var(--error);
}

/* Tooltip for icon buttons */
.archive-btn::before,
.delete-btn::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-0.5rem);
    background: var(--surface);
    color: var(--text-primary);
    padding: 0.375rem 0.625rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px var(--shadow);
    z-index: 1000;
}

.archive-btn:hover::before,
.delete-btn:hover::before,
.archive-btn:focus::before,
.delete-btn:focus::before {
    opacity: 1;
    transform: translateX(-50%) translateY(-0.25rem);
}

/* Touch support for mobile - show tooltip on tap */
@media (hover: none) and (pointer: coarse) {
    .archive-btn:active::before,
    .delete-btn:active::before {
        opacity: 1;
        transform: translateX(-50%) translateY(-0.25rem);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@media (max-width: 768px) {
    .toast-container {
        bottom: 0.75rem;
        right: 0.75rem;
        left: 0.75rem;
        align-items: flex-end;
    }

    .toast {
        white-space: normal;
        max-width: 100%;
    }

    .top-header-bar {
        padding: 0.75rem 0;
    }

    .header-row {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .header-left {
        justify-content: flex-start;
    }

    .app-title {
        font-size: 1.5rem;
    }

    .title-icon {
        width: 44px;
        height: 44px;
    }

    .header-right {
        flex-wrap: wrap;
        gap: 0.75rem;
    }
    
    /* Remove focus outline and active state persistence on mobile nav buttons */
    .search-toggle-btn,
    .add-link-toggle-btn,
    .lists-toggle-btn,
    .layout-toggle-btn,
    .login-toggle-btn {
        -webkit-tap-highlight-color: transparent;
        -webkit-touch-callout: none;
        touch-action: manipulation;
        width: 44px;
        height: 44px;
        padding: 0.625rem;
    }
    
    .search-toggle-btn svg,
    .add-link-toggle-btn svg,
    .lists-toggle-btn svg,
    .layout-toggle-btn svg,
    .login-toggle-btn svg {
        width: 22px;
        height: 22px;
    }
    
    .search-toggle-btn:focus,
    .add-link-toggle-btn:focus,
    .lists-toggle-btn:focus,
    .layout-toggle-btn:focus,
    .login-toggle-btn:focus {
        outline: none;
    }
    
    /* Prevent active state from persisting when button is not in .active class */
    .search-toggle-btn:active:not(.active),
    .add-link-toggle-btn:active:not(.active),
    .lists-toggle-btn:active:not(.active),
    .layout-toggle-btn:active:not(.active),
    .login-toggle-btn:active:not(.active) {
        background: transparent !important;
        border-color: var(--border) !important;
        color: var(--text-secondary) !important;
    }
    
    /* Ensure buttons without .active class return to default state */
    .search-toggle-btn:not(.active),
    .add-link-toggle-btn:not(.active),
    .lists-toggle-btn:not(.active),
    .layout-toggle-btn:not(.active),
    .login-toggle-btn:not(.active) {
        background: transparent !important;
        border-color: var(--border) !important;
        color: var(--text-secondary) !important;
    }
    
    /* Extra specificity for lists-toggle-btn to ensure it resets */
    .lists-toggle-btn:not(.active):not(:hover) {
        background: transparent !important;
        border-color: var(--border) !important;
        color: var(--text-secondary) !important;
    }
    
    /* Hide username text on mobile, show only logout icon */
    .user-info span {
        display: none;
    }
    
    .user-info {
        padding: 0;
        gap: 0;
        min-height: 44px;
        width: 44px;
        height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .logout-btn {
        width: 44px;
        height: 44px;
        padding: 0.625rem;
        margin: 0;
    }

    .logout-btn svg {
        width: 20px;
        height: 20px;
    }

    .add-link-toggle-btn {
        display: flex;
    }

    .lists-toggle-btn {
        width: 44px !important;
        height: 44px !important;
        padding: 0.625rem;
    }

    .lists-toggle-btn svg {
        width: 22px;
        height: 22px;
    }

    .layout-toggle-wrapper {
        position: relative;
    }

    .layout-dropdown {
        right: 0;
    }

    .add-link-wrapper {
        width: 100%;
        margin: 0;
        padding: 0;
        display: none;
        opacity: 0;
        transform: translateY(-10px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .add-link-wrapper.show {
        display: block;
        opacity: 1;
        transform: translateY(0);
    }

    .add-link-wrapper .input-wrapper {
        height: 52px !important;
        padding: 0.75rem 1rem !important;
    }

    .add-link-wrapper .input-wrapper #linkInput {
        font-size: 1rem;
    }

    .add-link-wrapper .input-wrapper .btn-add {
        width: 44px !important;
        height: 44px !important;
        padding: 0.625rem !important;
    }

    .add-link-wrapper .input-wrapper .btn-add::after {
        font-size: 1.5rem !important;
    }

    .search-wrapper {
        width: 100%;
        margin: 0;
        padding: 0.75rem 1rem;
        display: none;
        opacity: 0;
        transform: translateY(-10px);
        transition: opacity 0.3s ease, transform 0.3s ease;
        min-height: 52px;
    }

    .search-wrapper.show {
        display: flex;
        opacity: 1;
        transform: translateY(0);
    }

    .search-wrapper #searchInput {
        font-size: 1rem;
    }

    .input-wrapper {
        flex-wrap: nowrap;
        min-height: 48px;
        padding: 0.625rem 1rem;
    }

    #linkInput {
        font-size: 1rem;
        padding: 0.625rem 0;
    }

    .btn-add {
        width: 44px;
        height: 44px;
        padding: 0.625rem;
        flex-shrink: 0;
    }

    .btn-add::after {
        font-size: 1.75rem;
    }

    .link-actions {
        flex-wrap: wrap;
        gap: 0.625rem;
    }

    .archive-btn,
    .delete-btn,
    .add-to-list-btn {
        width: 44px !important;
        height: 44px !important;
        padding: 0.625rem;
    }

    .archive-btn svg,
    .delete-btn svg,
    .add-to-list-btn svg {
        width: 20px;
        height: 20px;
    }

    .add-to-list-btn {
        width: 44px !important;
        height: 44px !important;
        padding: 0.625rem;
    }

    .add-to-list-btn svg {
        width: 20px;
        height: 20px;
    }

    .edit-lists-btn,
    .clear-list-filters-btn {
        padding: 0.625rem 1rem;
        font-size: 0.9375rem;
        min-height: 44px;
    }

    .edit-lists-btn svg {
        width: 18px;
        height: 18px;
    }

    .list-filter-chip {
        padding: 0.625rem 1rem;
        font-size: 0.9375rem;
        min-height: 44px;
    }

    .archive-toggle-slider {
        width: 50px;
        height: 28px;
    }

    .archive-toggle-slider:before {
        height: 22px;
        width: 22px;
    }

    .archive-toggle-switch input:checked + .archive-toggle-slider:before {
        transform: translateX(22px);
    }

    .links-container {
        grid-template-columns: 1fr;
    }

    .close-modal-btn,
    .close-overlay-btn {
        width: 44px;
        height: 44px;
        padding: 0.625rem;
    }

    .close-modal-btn svg,
    .close-overlay-btn svg {
        width: 22px;
        height: 22px;
    }

    .btn-login,
    .btn-create-list {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
        min-height: 48px;
    }

    .form-group input {
        padding: 0.875rem;
        font-size: 1rem;
        min-height: 48px;
    }

    .create-list-form input {
        padding: 0.875rem;
        font-size: 1rem;
        min-height: 48px;
    }
}

/* Scroll to Top Button */
.scroll-to-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

@media (max-width: 768px) {
    .scroll-to-top-btn {
        width: 56px;
        height: 56px;
        bottom: 1.5rem;
        right: 1.5rem;
    }

    .scroll-to-top-btn svg {
        width: 28px;
        height: 28px;
    }
}

.scroll-to-top-btn.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.5);
}

.scroll-to-top-btn:active {
    transform: translateY(-1px);
}

.scroll-to-top-btn svg {
    width: 24px;
    height: 24px;
}

@media (max-width: 400px) {
    .header-right {
        flex-wrap: nowrap;
        gap: 0.625rem;
    }

    .search-wrapper {
        min-width: 100%;
    }

    .scroll-to-top-btn {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 52px;
        height: 52px;
    }

    .scroll-to-top-btn svg {
        width: 26px;
        height: 26px;
    }
}

/* Lists Toggle Button */
.lists-toggle-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

.lists-toggle-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.lists-toggle-btn.active {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.lists-toggle-btn svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: block;
    margin: 0;
    padding: 0;
}

/* List Filter Section */
.list-filter-wrapper {
    width: 100%;
    padding: 0.75rem 0;
    margin-top: 8px;
    border-top: 1px solid var(--border);
    display: none;
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity 0.3s ease, max-height 0.3s ease, padding 0.3s ease;
}

.list-filter-wrapper.show {
    display: block;
    opacity: 1;
    max-height: 500px;
}

.list-filter-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.list-filter-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Archive Toggle Switch */
.archive-toggle-switch {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    flex-shrink: 0;
}

.archive-toggle-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    user-select: none;
    white-space: nowrap;
}

.archive-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.archive-toggle-slider {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    cursor: pointer;
    background-color: var(--border);
    transition: 0.3s;
    border-radius: 24px;
    flex-shrink: 0;
}

.archive-toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.archive-toggle-switch input:checked + .archive-toggle-slider {
    background-color: var(--secondary-color);
}

.archive-toggle-switch input:checked + .archive-toggle-slider:before {
    transform: translateX(20px);
}

.archive-toggle-switch:hover .archive-toggle-slider {
    background-color: var(--text-muted);
}

.archive-toggle-switch input:checked:hover + .archive-toggle-slider {
    background-color: var(--primary-color);
}

.edit-lists-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.edit-lists-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.edit-lists-btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.list-filter-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.clear-list-filters-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.clear-list-filters-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.list-filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.list-filter-chip {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.375rem 0.75rem;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.list-filter-chip:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.list-filter-chip.active {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Lists Management Modal */
.lists-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.lists-modal.show {
    opacity: 1;
    visibility: visible;
}

.lists-modal-content {
    background: var(--surface);
    border-radius: 1rem;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lists-modal.show .lists-modal-content {
    transform: scale(1);
}

.lists-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.lists-modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.close-modal-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
}

.close-modal-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.lists-modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.create-list-form {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.create-list-form input {
    flex: 1;
    background: var(--background);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 1rem;
}

.create-list-form input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-create-list {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-create-list:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-create-list:active {
    transform: translateY(0);
}

.lists-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.list-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--background);
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    min-width: 0;
    overflow: hidden;
}

.list-name-input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    overflow: hidden;
    text-overflow: ellipsis;
}

.list-name-input:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.list-item-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

.toggle-public-btn,
.public-url-btn,
.save-list-btn,
.delete-list-btn {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 0.375rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

.toggle-public-btn svg,
.public-url-btn svg,
.save-list-btn svg,
.delete-list-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2;
}

.toggle-public-btn {
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.3);
}

.toggle-public-btn:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: var(--success);
    color: var(--success);
}

.toggle-public-btn.active {
    color: var(--text-secondary);
    border-color: rgba(156, 163, 175, 0.3);
}

.toggle-public-btn.active:hover {
    background: var(--surface-light);
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.public-url-btn {
    color: var(--primary-color);
    border-color: rgba(99, 102, 241, 0.3);
}

.public-url-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.save-list-btn {
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.3);
}

.save-list-btn:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: var(--success);
    color: var(--success);
}

.delete-list-btn {
    color: var(--error);
    border-color: rgba(239, 68, 68, 0.3);
}

.delete-list-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--error);
    color: var(--error);
}

.empty-lists-message {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem;
}

/* Login Modal */
.login-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.login-modal.show {
    opacity: 1;
    visibility: visible;
}

.login-modal-content {
    background: var(--surface);
    border-radius: 1rem;
    width: 90%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.login-modal.show .login-modal-content {
    transform: scale(1);
}

.login-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem;
    border-bottom: 1px solid var(--border);
}

.login-modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.login-modal-body {
    padding: 1.5rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.form-group input {
    background: var(--background);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.login-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
}

.btn-login {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-login:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-login:active:not(:disabled) {
    transform: translateY(0);
}

.btn-login:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-login .btn-loader {
    display: none;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* List Selection Overlay */
.list-selection-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.list-selection-overlay.show {
    opacity: 1;
    visibility: visible;
}

.list-selection-content {
    background: var(--surface);
    border-radius: 1rem;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.list-selection-overlay.show .list-selection-content {
    transform: scale(1);
}

.list-selection-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem;
    border-bottom: 1px solid var(--border);
}

.list-selection-header h3 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.close-overlay-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    width: 36px;
    height: 36px;
}

.close-overlay-btn:hover {
    background: var(--surface-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.list-selection-body {
    padding: 1.5rem;
    overflow-y: auto;
    max-height: 400px;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.list-checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--background);
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s ease;
}

.list-checkbox-item:hover {
    background: var(--surface-light);
}

.list-checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.list-checkbox-item span {
    color: var(--text-primary);
    flex: 1;
}


/* Add to List Button in Link Cards */
.add-to-list-btn {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    padding: 0.375rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
    width: 32px;
    height: 32px;
    box-sizing: border-box;
}

.add-to-list-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2;
    flex-shrink: 0;
    display: block;
    margin: 0;
    padding: 0;
}

.add-to-list-btn {
    color: var(--primary-color);
    border-color: rgba(99, 102, 241, 0.3);
}

.add-to-list-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .lists-modal-content,
    .list-selection-content {
        width: 95%;
        max-height: 90vh;
    }

    .create-list-form {
        flex-direction: column;
    }

    .list-item {
        gap: 0.5rem;
        padding: 0.5rem;
    }

    .list-name-input {
        font-size: 0.9rem;
        padding: 0.25rem;
    }

    .list-item-actions {
        gap: 0.25rem;
    }

    .toggle-public-btn,
    .public-url-btn,
    .save-list-btn,
    .delete-list-btn {
        padding: 0.625rem;
        min-width: 44px;
        width: 44px;
        height: 44px;
    }

    .toggle-public-btn svg,
    .public-url-btn svg,
    .save-list-btn svg,
    .delete-list-btn svg {
        width: 20px;
        height: 20px;
    }

    .list-item {
        padding: 0.75rem;
    }

    .list-name-input {
        font-size: 1rem;
        padding: 0.5rem;
        min-height: 44px;
    }
}

/* Hide page title on very small screens */
@media (max-width: 357px) {
    .app-title {
        display: none;
    }
}