/* ============================================================
   DataZ Tools - Modern Redesign
   Sidebar navigation, modern typography, improved UX
   ============================================================ */

/* ====== Google Fonts ====== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ====== Base Typography Override ====== */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    overflow: hidden;
}

/* ====== App Layout - Sidebar + Main ====== */
.app-layout {
    display: flex;
    height: calc(100vh - 56px);
    /* full height minus header */
    overflow: hidden;
    position: relative;
}

/* ====== Header Redesign ====== */
header {
    padding: 0 16px;
    height: 56px;
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
    position: relative;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    height: 100%;
}

.header-content svg {
    height: 42px;
    width: auto;
    flex-shrink: 0;
}

/* Hamburger Menu Button */
.hamburger-btn {
    display: none;
    background: none;
    border: none;
    color: var(--header-text);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
    line-height: 1;
    flex-shrink: 0;
}

.hamburger-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

body.light .hamburger-btn:hover {
    background: rgba(0, 0, 0, 0.06);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
}

/* Theme Toggle Redesign */
.theme-btn {
    padding: 7px 14px;
    cursor: pointer;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: var(--btn-bg);
    color: var(--btn-text);
    font-size: 12px;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.theme-btn:hover {
    background: var(--btn-hover-bg);
    transform: translateY(-1px);
}

/* Language Selector Redesign */
.language-selector {
    border-radius: 20px !important;
    padding: 6px 12px !important;
    font-size: 12px !important;
    font-family: 'Inter', sans-serif !important;
    font-weight: 500;
    border: 1px solid var(--border-color) !important;
    transition: all 0.2s ease !important;
    cursor: pointer;
    min-width: 120px;
}

/* ====== Sidebar ====== */
.sidebar {
    width: 260px;
    min-width: 260px;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    overflow: hidden;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
        min-width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 50;
    flex-shrink: 0;
}

.sidebar.collapsed {
    width: 36px;
    min-width: 36px;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-header,
.sidebar.collapsed .sidebar-nav,
.sidebar.collapsed .sidebar-shortcut-hint {
    display: none;
}

/* Show expand button centered in collapsed sidebar */
.sidebar-expand-btn {
    display: none;
    width: 100%;
    height: 100%;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--btn-text);
    font-size: 14px;
    opacity: 0.6;
    transition: opacity 0.2s, background 0.2s;
    padding: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.sidebar-expand-btn:hover {
    opacity: 1;
    background: var(--sidebar-hover, var(--btn-hover-bg));
}

.sidebar-expand-btn .expand-label {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 1px;
    opacity: 0.7;
}

.sidebar.collapsed .sidebar-expand-btn {
    display: flex;
}

/* Hide the floating expand tab - not used */
.sidebar-expand-tab {
    display: none !important;
}

/* Sidebar Header */
.sidebar-header {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    transition: opacity 0.2s;
}

.sidebar-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.sidebar-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--header-text);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.3px;
}

.sidebar-title i {
    font-size: 16px;
    color: var(--btn-active-bg);
}

.sidebar-collapse-btn {
    background: none;
    border: none;
    color: var(--btn-text);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.2s;
    opacity: 0.6;
}

.sidebar-collapse-btn:hover {
    background: var(--btn-hover-bg);
    opacity: 1;
}

/* Sidebar Search */
.sidebar-search-wrap {
    position: relative;
}

.sidebar-search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--btn-text);
    opacity: 0.4;
    font-size: 12px;
    pointer-events: none;
}

.tool-search-input {
    width: 100%;
    padding: 8px 10px 8px 32px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--input-text);
    font-size: 13px;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

.tool-search-input:focus {
    border-color: var(--btn-active-bg);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.15);
}

.tool-search-input::placeholder {
    color: var(--btn-text);
    opacity: 0.4;
}

/* Sidebar Navigation - Transforms toolbar */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 0;
    transition: opacity 0.2s;
}

/* Scrollbar styling for sidebar */
.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb:hover {
    background: var(--btn-hover-bg);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 10px 14px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
    transition: opacity 0.2s;
}

/* ====== Toolbar -> Sidebar Nav Overrides ====== */
.sidebar-nav .toolbar {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 0 8px;
    background: transparent;
    flex-wrap: nowrap;
}

/* Tool Category in Sidebar */
.sidebar-nav .tool-category {
    display: block;
    width: 100%;
    position: relative;
}

.sidebar-nav .category-btn {
    width: 100%;
    min-width: unset;
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 13px;
    gap: 10px;
    justify-content: flex-start;
    transition: all 0.2s ease;
    border: none;
    position: relative;
}

.sidebar-nav .category-btn:hover {
    transform: none;
}

.sidebar-nav .category-info {
    flex: 1;
    min-width: 0;
}

.sidebar-nav .category-text {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.7;
    display: block;
}

.sidebar-nav .selected-tool {
    font-size: 13px;
    font-weight: 500;
    max-width: 160px;
    display: block;
}

.sidebar-nav .category-arrow {
    font-size: 10px;
    transition: transform 0.3s ease;
    opacity: 0.5;
}

.sidebar-nav .category-btn.open .category-arrow {
    transform: rotate(180deg);
}

/* Category Dropdown in Sidebar */
.sidebar-nav .category-dropdown {
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    border: none;
    box-shadow: none;
    background: transparent;
    padding: 2px 0 2px 0;
    min-width: unset;
    border-radius: 0;
    margin-left: 0;
}

.sidebar-nav .category-dropdown.show {
    display: block;
    animation: sidebarDropdown 0.2s ease-out;
}

@keyframes sidebarDropdown {
    from {
        opacity: 0;
        max-height: 0;
    }

    to {
        opacity: 1;
        max-height: 400px;
    }
}

/* Dropdown Items in Sidebar */
.sidebar-nav .dropdown-item {
    padding: 8px 12px 8px 40px;
    font-size: 13px;
    border-radius: 6px;
    margin: 1px 4px;
    transition: all 0.15s ease;
    border: none !important;
    position: relative;
    font-weight: 400;
    background: transparent !important;
    color: var(--btn-text) !important;
}

.sidebar-nav .dropdown-item i {
    width: 16px;
    text-align: center;
    margin-right: 8px;
    font-size: 12px;
    opacity: 0.7;
}

.sidebar-nav .dropdown-item:hover {
    background: var(--sidebar-hover) !important;
    color: var(--btn-text) !important;
    transform: none !important;
    box-shadow: none !important;
}

.sidebar-nav .dropdown-item.active {
    background: var(--sidebar-hover) !important;
    color: var(--btn-active-bg) !important;
    font-weight: 600;
    border: none !important;
    transform: none !important;
    box-shadow: none !important;
    animation: none !important;
}

.sidebar-nav .dropdown-item.active::after {
    display: none !important;
}

/* Storage button in sidebar */
.sidebar-nav .storage-btn {
    width: calc(100% - 16px);
    margin: 8px 8px 4px;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px dashed var(--border-color);
    background: transparent;
    color: var(--btn-text);
    cursor: pointer;
    transition: all 0.2s;
}

.sidebar-nav .storage-btn:hover {
    background: var(--btn-hover-bg);
    border-style: solid;
}

.sidebar-nav .storage-btn .category-text {
    font-size: 13px;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0;
    opacity: 1;
}

/* Tool item hidden by search */
.tool-category.search-hidden,
.dropdown-item.search-hidden {
    display: none !important;
}

/* No results message */
.sidebar-no-results {
    text-align: center;
    padding: 20px;
    color: var(--btn-text);
    opacity: 0.5;
    font-size: 13px;
    display: none;
}

.sidebar-no-results.show {
    display: block;
}

/* ====== Sidebar Overlay (Mobile) ====== */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 45;
    opacity: 0;
    transition: opacity 0.3s;
    backdrop-filter: blur(2px);
}

.sidebar-overlay.show {
    display: block;
    opacity: 1;
}

/* ====== Main Content Area ====== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

/* ====== Container Override ====== */
.main-content>.container {
    flex: 1;
    height: 100%;
    padding: 16px;
    overflow-y: auto;
}

/* ====== JSON Error & Fix Notices ====== */
.json-fix-notice {
    background: #e8f5e9;
    border: 1px solid #a5d6a7;
    border-left: 4px solid #4caf50;
    color: #2e7d32;
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 12px;
    font-size: 13px;
    line-height: 1.4;
}

body.dark .json-fix-notice {
    background: #1b3a1b;
    border-color: #2e5a2e;
    color: #81c784;
}

.json-error-container {
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: 13px;
}

.json-error-header {
    color: #d32f2f;
    font-size: 15px;
    margin-bottom: 8px;
}

body.dark .json-error-header {
    color: #ef9a9a;
}

.json-error-message {
    background: #ffebee;
    border: 1px solid #ef9a9a;
    border-left: 4px solid #d32f2f;
    color: #c62828;
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 12px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    word-break: break-word;
}

body.dark .json-error-message {
    background: #3a1a1a;
    border-color: #5a2a2a;
    color: #ef9a9a;
}

.json-error-code {
    background: #263238;
    border-radius: 8px;
    padding: 10px 0;
    margin-bottom: 12px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.6;
}

.json-error-line {
    padding: 1px 12px;
    color: #b0bec5;
    white-space: pre;
}

.json-error-line-active {
    background: #4a1a1a;
    color: #ffcdd2;
    border-left: 3px solid #f44336;
    padding-left: 9px;
}

.json-error-linenum {
    color: #607d8b;
    user-select: none;
    margin-right: 8px;
}

.json-error-pointer {
    color: #f44336;
    font-weight: 700;
}

.json-error-tips {
    background: #fff3e0;
    border: 1px solid #ffe0b2;
    border-radius: 6px;
    padding: 10px 14px;
    color: #e65100;
    font-size: 12px;
}

body.dark .json-error-tips {
    background: #2e2418;
    border-color: #4a3820;
    color: #ffb74d;
}

.json-error-tips ul {
    margin: 4px 0 0;
    padding-left: 18px;
}

.json-error-tips li {
    margin-bottom: 3px;
}

.json-error-tips code {
    background: rgba(0, 0, 0, 0.08);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 11px;
}

body.dark .json-error-tips code {
    background: rgba(255, 255, 255, 0.1);
}

/* ====== Panel Redesign ====== */
.panel {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--panel-bg, var(--bg-color));
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transition: all 0.2s ease;
    border-top: none;
    margin-top: 0;
}

.panel:not(.hidden) {
    animation: panelFadeIn 0.25s ease-out;
}

@keyframes panelFadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Remove colored panel borders - use subtle styling instead */
#panel-json:not(.hidden),
#panel-xml:not(.hidden),
#panel-graph:not(.hidden),
#panel-csv:not(.hidden),
#panel-base64:not(.hidden),
#panel-jwt:not(.hidden),
#panel-url:not(.hidden),
#panel-hash:not(.hidden),
#panel-uuid:not(.hidden),
#panel-qr:not(.hidden),
#panel-password:not(.hidden),
#panel-color:not(.hidden),
#panel-timestamp:not(.hidden),
#panel-regex:not(.hidden),
#panel-text:not(.hidden),
#panel-api:not(.hidden),
#panel-markdown:not(.hidden),
#panel-sql:not(.hidden),
#panel-diff:not(.hidden),
#panel-jsonpath:not(.hidden),
#panel-summarize:not(.hidden),
#panel-translate:not(.hidden),
#panel-sentiment:not(.hidden),
#panel-grammar:not(.hidden),
#panel-keywords:not(.hidden) {
    border: 1px solid var(--border-color);
    border-top: 3px solid var(--btn-active-bg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

/* ====== IO Wrapper Improvements ====== */
.io-wrapper {
    padding: 14px;
    gap: 10px;
}

.io-wrapper>.btn-group {
    border-radius: 10px;
    padding: 6px 8px;
    gap: 4px;
    background: var(--toolbar-bg);
    border: 1px solid var(--border-color);
}

/* ====== Button Redesign ====== */
.btn-group button,
.action-btn {
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 12px;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    transition: all 0.15s ease;
    gap: 4px;
    display: inline-flex;
    align-items: center;
}

.btn-group button:hover,
.action-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn-group button:active,
.action-btn:active {
    transform: translateY(0);
}

.btn-group button i,
.action-btn i {
    font-size: 11px;
    margin-right: 4px;
}

/* ====== Textarea Improvements ====== */
textarea {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 13px;
    padding: 12px;
    transition: border-color 0.2s, box-shadow 0.2s;
    line-height: 1.5;
}

textarea:focus {
    outline: none;
    border-color: var(--btn-active-bg);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

/* ====== Output Improvements ====== */
.output {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 12px;
}

/* ====== Footer Redesign ====== */
footer {
    padding: 8px 16px;
    font-size: 12px;
    border-top: 1px solid var(--border-color);
    position: relative;
    z-index: 10;
}

.footer-content {
    padding: 0;
    gap: 10px;
}

.footer-content p {
    margin: 0;
    font-size: 12px;
    opacity: 0.7;
}

.footer-btn {
    border-radius: 16px;
    font-size: 11px;
    padding: 4px 12px;
    font-family: 'Inter', sans-serif;
}

/* ====== Divider Styling ====== */
.divider {
    width: 4px;
    min-width: 4px;
    cursor: col-resize;
    background: var(--border-color);
    border-radius: 4px;
    transition: background 0.2s;
    flex-shrink: 0;
}

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

/* ====== Modal Improvements ====== */
.modal-content {
    border-radius: 16px;
    font-family: 'Inter', sans-serif;
}

.modal-close,
.modal-content .close {
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

/* ====== Remove Excessive AI Animations ====== */
.sidebar-nav .tool-category[data-category="ai"] .category-btn {
    animation: none;
    background-size: 100% 100%;
}

.sidebar-nav .tool-category[data-category="ai"] .category-btn::after {
    display: none;
    /* Remove "NEW" badge in sidebar */
}

.sidebar-nav .tool-category[data-category="ai"] .category-btn .fas.fa-robot {
    animation: none;
}

.sidebar-nav .tool-category[data-category="ai"] .dropdown-item.active::after {
    display: none;
}

.sidebar-nav .tool-category[data-category="ai"] .dropdown-item:hover {
    transform: none;
    box-shadow: none;
}

.sidebar-nav .tool-category[data-category="ai"].active .category-btn,
.sidebar-nav .tool-category[data-category="ai"]:has(.dropdown-item.active) .category-btn {
    animation: none;
    transform: none;
}

.sidebar-nav .tool-category[data-category="ai"].active .category-btn::before,
.sidebar-nav .tool-category[data-category="ai"]:has(.dropdown-item.active) .category-btn::before {
    display: none;
}

/* Also calm down other category active indicators */
.sidebar-nav .tool-category.active .category-btn::before,
.sidebar-nav .tool-category:has(.dropdown-item.active) .category-btn::before {
    display: none !important;
}

.sidebar-nav .tool-category.active .category-btn,
.sidebar-nav .tool-category:has(.dropdown-item.active) .category-btn {
    transform: none !important;
    box-shadow: none !important;
}

/* Fix z-index stacking for sidebar categories */
.sidebar-nav .tool-category {
    position: relative;
    z-index: 1;
    overflow: hidden;
}

/* Kill ALL decorative pseudo-elements and animations in sidebar */
.sidebar-nav .tool-category .category-btn::before,
.sidebar-nav .tool-category .category-btn::after,
.sidebar-nav .tool-category .category-btn .shimmer {
    display: none !important;
    content: none !important;
}

/* Kill all animations in sidebar */
.sidebar-nav .tool-category .category-btn,
.sidebar-nav .tool-category .category-btn * {
    animation: none !important;
}

.sidebar-nav .tool-category[data-category="viewers"] .category-btn,
.sidebar-nav .tool-category[data-category="encoders"] .category-btn,
.sidebar-nav .tool-category[data-category="generators"] .category-btn,
.sidebar-nav .tool-category[data-category="converters"] .category-btn,
.sidebar-nav .tool-category[data-category="texttools"] .category-btn,
.sidebar-nav .tool-category[data-category="ai"] .category-btn {
    position: relative;
    z-index: 2;
    transform: none !important;
}

/* Override all category-specific active state transforms */
.sidebar-nav .tool-category[data-category="viewers"].active .category-btn,
.sidebar-nav .tool-category[data-category="viewers"]:has(.dropdown-item.active) .category-btn,
.sidebar-nav .tool-category[data-category="encoders"].active .category-btn,
.sidebar-nav .tool-category[data-category="encoders"]:has(.dropdown-item.active) .category-btn,
.sidebar-nav .tool-category[data-category="generators"].active .category-btn,
.sidebar-nav .tool-category[data-category="generators"]:has(.dropdown-item.active) .category-btn,
.sidebar-nav .tool-category[data-category="converters"].active .category-btn,
.sidebar-nav .tool-category[data-category="converters"]:has(.dropdown-item.active) .category-btn,
.sidebar-nav .tool-category[data-category="texttools"].active .category-btn,
.sidebar-nav .tool-category[data-category="texttools"]:has(.dropdown-item.active) .category-btn,
.sidebar-nav .tool-category[data-category="ai"].active .category-btn,
.sidebar-nav .tool-category[data-category="ai"]:has(.dropdown-item.active) .category-btn {
    transform: none !important;
    box-shadow: none !important;
    border: none !important;
    position: relative !important;
}

.sidebar-nav .tool-category[data-category="viewers"].active .category-btn::before,
.sidebar-nav .tool-category[data-category="viewers"]:has(.dropdown-item.active) .category-btn::before,
.sidebar-nav .tool-category[data-category="encoders"].active .category-btn::before,
.sidebar-nav .tool-category[data-category="encoders"]:has(.dropdown-item.active) .category-btn::before,
.sidebar-nav .tool-category[data-category="generators"].active .category-btn::before,
.sidebar-nav .tool-category[data-category="generators"]:has(.dropdown-item.active) .category-btn::before,
.sidebar-nav .tool-category[data-category="converters"].active .category-btn::before,
.sidebar-nav .tool-category[data-category="converters"]:has(.dropdown-item.active) .category-btn::before,
.sidebar-nav .tool-category[data-category="texttools"].active .category-btn::before,
.sidebar-nav .tool-category[data-category="texttools"]:has(.dropdown-item.active) .category-btn::before,
.sidebar-nav .tool-category[data-category="ai"].active .category-btn::before,
.sidebar-nav .tool-category[data-category="ai"]:has(.dropdown-item.active) .category-btn::before {
    display: none !important;
}

/* Active category in sidebar - handled by .sidebar-nav .dropdown-item.active above */

/* ====== Theme Variable Additions ====== */
:root {
    --sidebar-bg: #1e1e1e;
    --panel-bg: #1e1e1e;
    --sidebar-hover: #2a2a2a;
}

body.light {
    --sidebar-bg: #f8f9fa;
    --panel-bg: #ffffff;
    --sidebar-hover: #e9ecef;
}

body.dark {
    --sidebar-bg: #1e1e1e;
    --panel-bg: #1e1e1e;
    --sidebar-hover: #2a2a2a;
}

/* ====== Category button styling in sidebar ====== */
.sidebar-nav .tool-category .category-btn {
    border: none !important;
    border-radius: 8px;
    box-shadow: none !important;
}

/* Light theme category colors - unified neutral */
body.light .sidebar-nav .tool-category .category-btn {
    background: #f5f6f8 !important;
    color: #4a5568 !important;
}

body.light .sidebar-nav .tool-category .category-btn:hover {
    background: #ebedf0 !important;
}

/* Dark theme category button styles */
body.dark .sidebar-nav .tool-category .category-btn {
    background: #252830 !important;
    color: #b0b8c8 !important;
}

body.dark .sidebar-nav .tool-category .category-btn:hover {
    background: var(--sidebar-hover) !important;
}

/* ====== Responsive Design ====== */

/* Desktop - show sidebar toggle in header */
@media (min-width: 769px) {
    .hamburger-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .sidebar.collapsed+.sidebar-overlay+.main-content {
        /* main-content takes remaining space via flex */
    }
}

/* Tablet */
@media (max-width: 1024px) {
    .sidebar {
        width: 220px;
        min-width: 220px;
    }

    .sidebar-nav .selected-tool {
        max-width: 120px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .app-layout {
        height: calc(100vh - 48px);
    }

    header {
        height: 48px;
        padding: 0 12px;
    }

    .header-content svg {
        height: 32px;
    }

    .hamburger-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        order: -1;
    }

    .header-controls {
        gap: 6px;
    }

    .theme-btn {
        padding: 5px 10px;
        font-size: 11px;
    }

    .language-selector {
        min-width: 90px !important;
        font-size: 11px !important;
    }

    /* Sidebar becomes off-canvas */
    .sidebar {
        position: fixed;
        top: 48px;
        left: 0;
        bottom: 0;
        width: 280px;
        min-width: 280px;
        transform: translateX(-100%);
        z-index: 200;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar.collapsed {
        transform: translateX(-100%);
        width: 280px;
        min-width: 280px;
    }

    .sidebar-collapse-btn {
        display: none;
    }

    /* Hide expand tab/btn on mobile - hamburger is used instead */
    .sidebar-expand-tab,
    .sidebar-expand-btn {
        display: none !important;
    }

    /* Sidebar close button visible on mobile */
    .sidebar-close-btn {
        display: block !important;
    }

    .main-content>.container {
        padding: 10px;
    }

    .io-wrapper {
        padding: 10px;
    }

    /* Stack IO content vertically on mobile */
    .io-content {
        flex-direction: column;
    }

    .divider {
        width: 100%;
        min-width: 100%;
        height: 4px;
        min-height: 4px;
        cursor: row-resize;
    }

    footer {
        padding: 6px 12px;
    }

    .footer-content {
        flex-direction: column;
        gap: 6px;
    }

    .footer-buttons {
        justify-content: center;
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .header-content svg {
        height: 28px;
    }

    .sidebar {
        width: 100%;
        min-width: 100%;
    }

    .sidebar.collapsed {
        width: 100%;
        min-width: 100%;
    }
}

/* ====== Smooth Scrolling ====== */
.main-content>.container {
    scroll-behavior: smooth;
}

/* ====== Selection Color ====== */
::selection {
    background: rgba(33, 150, 243, 0.3);
    color: inherit;
}

/* ====== Focus Visible for Accessibility ====== */
button:focus-visible,
select:focus-visible,
input:focus-visible {
    outline: 2px solid var(--btn-active-bg);
    outline-offset: 2px;
}

/* ====== Sidebar Close Button (Mobile) ====== */
.sidebar-close-btn {
    display: none;
    background: none;
    border: none;
    color: var(--btn-text);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 6px;
    font-size: 16px;
    transition: all 0.2s;
    opacity: 0.6;
}

.sidebar-close-btn:hover {
    background: var(--btn-hover-bg);
    opacity: 1;
}

/* ====== Keyboard Shortcut Hint ====== */
.sidebar-shortcut-hint {
    text-align: center;
    padding: 6px;
    font-size: 11px;
    color: var(--btn-text);
    opacity: 0.4;
    border-top: 1px solid var(--border-color);
}

.sidebar-shortcut-hint kbd {
    background: var(--btn-bg);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 1px 5px;
    font-size: 10px;
    font-family: 'Inter', sans-serif;
}

/* ====== Breadcrumb hide (not needed with sidebar) ====== */
.breadcrumb-nav {
    display: none !important;
}

/* ====== SEO Content stays hidden ====== */
.seo-content {
    display: none !important;
}

/* ====== Panel Border Color Override - unified accent ====== */
/* Use a subtle top accent instead of full border */
#panel-json:not(.hidden),
#panel-xml:not(.hidden),
#panel-graph:not(.hidden),
#panel-csv:not(.hidden),
#panel-base64:not(.hidden),
#panel-jwt:not(.hidden),
#panel-url:not(.hidden),
#panel-hash:not(.hidden),
#panel-uuid:not(.hidden),
#panel-qr:not(.hidden),
#panel-password:not(.hidden),
#panel-color:not(.hidden),
#panel-timestamp:not(.hidden),
#panel-regex:not(.hidden),
#panel-text:not(.hidden),
#panel-api:not(.hidden),
#panel-markdown:not(.hidden),
#panel-sql:not(.hidden),
#panel-diff:not(.hidden),
#panel-jsonpath:not(.hidden),
#panel-summarize:not(.hidden),
#panel-translate:not(.hidden),
#panel-sentiment:not(.hidden),
#panel-grammar:not(.hidden),
#panel-keywords:not(.hidden) {
    border-top: 3px solid var(--btn-active-bg);
}

/* ====== Tooltip for Sidebar Items ====== */
.sidebar-nav .dropdown-item[title]:hover::after {
    /* Future: could add tooltips */
}

/* ====== Print Styles ====== */
@media print {

    .sidebar,
    .sidebar-overlay,
    header,
    footer,
    .btn-group {
        display: none !important;
    }

    .app-layout {
        display: block;
    }

    .main-content {
        width: 100%;
    }

    .panel {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
}