/* ============================================
   CSS Variables
   ============================================ */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary-color: #7c3aed;
    --secondary-hover: #6d28d9;
    --secondary-light: #ede9fe;
    --accent-color: #06b6d4;
    --accent-hover: #0891b2;
    --accent-light: #cffafe;
    --dark: #1e293b;
    --dark-hover: #0f172a;
    --dark-secondary: #334155;
    --light-bg: #f8fafc;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 10px 25px rgba(0, 0, 0, 0.12), 0 4px 10px rgba(0, 0, 0, 0.08);
    --card-shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Consolas', 'Monaco', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-hero: linear-gradient(135deg, #1e3a5f 0%, #2563eb 40%, #7c3aed 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-color), var(--primary-color));
}

[data-theme="dark"] {
    --primary-color: #60a5fa;
    --primary-hover: #93bbfc;
    --primary-light: #1e3a5f;
    --secondary-color: #a78bfa;
    --secondary-hover: #c4b5fd;
    --secondary-light: #2d1f5e;
    --accent-color: #22d3ee;
    --accent-hover: #67e8f9;
    --accent-light: #164e63;
    --dark: #0f172a;
    --dark-hover: #1e293b;
    --dark-secondary: #1e293b;
    --light-bg: #0f172a;
    --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --card-shadow-hover: 0 10px 25px rgba(0, 0, 0, 0.4), 0 4px 10px rgba(0, 0, 0, 0.3);
    --card-shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
    --info-color: #22d3ee;
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #2d1f5e 100%);
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--light-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

img {
    max-width: 100%;
    height: auto;
}

main {
    flex: 1;
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
    background-color: var(--dark) !important;
    padding: 0.6rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    z-index: 1030;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    color: #fff !important;
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand i {
    font-size: 1.1rem;
    opacity: 0.9;
}

.navbar .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

.navbar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.navbar .nav-link.active {
    color: #fff !important;
    border-left: 3px solid var(--accent-color);
    padding-left: 0.75rem !important;
}

.navbar .dropdown-menu {
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 0;
    box-shadow: var(--card-shadow-lg);
    min-width: 220px;
    animation: fadeIn var(--transition-fast);
}

.navbar .dropdown-header {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.4rem 1.25rem;
}

.navbar .dropdown-item {
    padding: 0.45rem 1.25rem;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.navbar .dropdown-item:hover {
    background-color: rgba(37, 99, 235, 0.15);
    padding-left: 1.5rem;
}

.navbar .dropdown-item.active {
    background-color: var(--primary-color);
}

.navbar-toggler {
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: 0.3rem 0.6rem;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.4);
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    pointer-events: none;
    animation: heroPattern 20s ease-in-out infinite alternate;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.6s ease-out;
}

.hero-section .lead {
    opacity: 0.9;
    animation: slideUp 0.6s ease-out 0.1s both;
}

.hero-section .btn {
    animation: slideUp 0.6s ease-out 0.2s both;
}

@keyframes heroPattern {
    0% { transform: scale(1) rotate(0deg); }
    100% { transform: scale(1.05) rotate(2deg); }
}

/* ============================================
   Tool Cards Grid
   ============================================ */
.tool-card {
    border-radius: var(--border-radius);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--primary-color);
}

.tool-card .card-body {
    padding: 1.5rem;
}

.tool-card .card-title {
    font-weight: 600;
    color: var(--text-primary);
}

.tool-card .card-text {
    font-size: 0.875rem;
}

.tool-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    background: var(--primary-light);
    color: var(--primary-color);
    transition: all var(--transition-normal);
}

.tool-card:hover .tool-icon {
    background: var(--primary-color);
    color: #fff;
    transform: scale(1.1);
}

/* ============================================
   Tool Interface - Side-by-side textarea layout
   ============================================ */
.tool-container {
    max-width: 100%;
}

.tool-input-output {
    display: flex;
    gap: 1rem;
}

.tool-input-output .col-md-6 {
    flex: 1;
    min-width: 0;
}

.form-control.font-monospace,
textarea.form-control {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    background-color: var(--light-bg);
    resize: vertical;
}

.form-control.font-monospace:focus,
textarea.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    outline: none;
}

textarea[readonly] {
    background-color: var(--light-bg);
    cursor: default;
}

.form-label.fw-bold {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* Button group */
.d-flex.flex-wrap.gap-2 {
    padding-top: 0.5rem;
}

.tool-options {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.tool-options .form-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.tool-options .form-select,
.tool-options .form-control {
    width: auto;
    min-width: 120px;
}

.tool-options label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0;
    font-size: 0.875rem;
}

/* Result output area */
.output-area {
    background-color: var(--light-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    min-height: 300px;
}

/* Copy success animation */
.btn-copy-success {
    background-color: var(--success-color) !important;
    border-color: var(--success-color) !important;
    color: #fff !important;
    transform: scale(1.05);
}

.btn-copy-success i::before {
    content: "\f00c";
}

/* Loading spinner overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    z-index: 10;
    animation: fadeIn var(--transition-fast);
}

.btn .spinner-border {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

.btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

/* ============================================
   JSON Tree View
   ============================================ */
.json-tree {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.7;
    padding: 1rem;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    overflow: auto;
    max-height: 600px;
}

.json-tree-node {
    position: relative;
    padding-left: 20px;
}

.json-tree-node .indent-line {
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border-color);
}

.json-tree-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    cursor: pointer;
    color: var(--text-muted);
    transition: all var(--transition-fast);
    border-radius: 3px;
    user-select: none;
    font-size: 0.7rem;
    flex-shrink: 0;
}

.json-tree-toggle:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.json-tree-toggle.collapsed i::before {
    content: "\f0da";
}

.json-tree-toggle.expanded i::before {
    content: "\f0dd";
}

.json-tree-key {
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
}

.json-tree-key:hover {
    text-decoration: underline;
}

.json-tree-colon {
    color: var(--text-muted);
    margin: 0 4px;
}

.json-tree-bracket {
    color: var(--text-secondary);
    font-weight: 600;
}

.json-tree-comma {
    color: var(--text-muted);
}

.json-tree-string {
    color: #059669;
}

.json-tree-number {
    color: #d97706;
}

.json-tree-boolean {
    color: #7c3aed;
}

.json-tree-null {
    color: #94a3b8;
    font-style: italic;
}

.json-tree-selected {
    background: var(--primary-light);
    border-radius: 3px;
    padding: 0 4px;
    margin: 0 -4px;
}

.json-tree-children {
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.json-tree-children.collapsed {
    display: none;
}

.json-tree-root {
    padding: 0;
    margin: 0;
}

.json-tree-path {
    background: var(--dark);
    color: #e2e8f0;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.json-tree-path .path-value {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--accent-color);
}

.json-tree-toolbar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

/* ============================================
   Feature / Stats Section
   ============================================ */
.stat-item {
    transition: transform var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-4px);
}

.stat-number {
    line-height: 1.2;
}

.stat-label {
    font-size: 0.95rem;
    font-weight: 500;
}

.features-section .card {
    transition: all var(--transition-normal);
}

.features-section .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    background: var(--light-bg);
}

/* ============================================
   Breadcrumb
   ============================================ */
.breadcrumb {
    background: transparent;
    padding: 0.75rem 0;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: '\f105';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--text-muted);
}

.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary-color);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

/* ============================================
   How-to-Use Section
   ============================================ */
.how-to-use ol {
    padding-left: 0;
    list-style: none;
    counter-reset: step-counter;
}

.how-to-use li {
    counter-increment: step-counter;
    position: relative;
    padding: 0.75rem 0 0.75rem 3rem;
    border-bottom: 1px solid var(--border-color);
}

.how-to-use li:last-child {
    border-bottom: none;
}

.how-to-use li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0.75rem;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
}

/* ============================================
   Related Tools
   ============================================ */
.related-tools .card {
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.related-tools .card:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow-hover);
    border-color: var(--primary-color);
}

.related-tools .card-title {
    font-size: 1rem;
    font-weight: 600;
}

.related-tools .card-text {
    font-size: 0.85rem;
}

/* ============================================
   SEO Content Section
   ============================================ */
.seo-content-section {
    background-color: var(--light-bg);
}

.seo-content {
    line-height: 1.8;
}

.seo-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.seo-content h2,
.seo-content h3 {
    color: var(--text-primary);
}

/* ============================================
   Page Header
   ============================================ */
.page-header {
    border-bottom: 1px solid var(--border-color);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    background: var(--gradient-primary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--dark) !important;
    padding: 2rem 0;
    margin-top: auto;
}

.footer a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: #fff;
}

.footer p {
    margin-bottom: 0.25rem;
}

.footer .fw-bold {
    color: #fff;
}

.footer .small {
    color: var(--text-muted);
}

.footer hr {
    opacity: 0.3;
}

[data-theme="dark"] .footer {
    background-color: #080d1a !important;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .footer a {
    color: var(--text-secondary);
}

[data-theme="dark"] .footer a:hover {
    color: #fff;
}

[data-theme="dark"] .footer .small {
    color: var(--text-muted);
}

[data-theme="dark"] .footer .badge {
    opacity: 0.9;
}

/* ============================================
   Friend Links Section
   ============================================ */
.friend-links-section {
    border-top: 1px solid var(--border-color);
}

.friend-links-section .btn {
    border-radius: 20px;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.friend-links-section .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: #fff;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    color: #fff;
}

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

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline-secondary:hover {
    background-color: var(--text-secondary);
    border-color: var(--text-secondary);
    color: #fff;
}

.btn-outline-danger:hover {
    transform: translateY(-1px);
}

.btn-light {
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-color);
    font-weight: 600;
    border: none;
}

.btn-light:hover {
    background: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    color: var(--primary-hover);
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.05rem;
}

.btn-sm {
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
}

.btn .spinner-border {
    vertical-align: middle;
}

/* ============================================
   Page-specific: Diff Highlighting
   ============================================ */
.diff-add {
    background-color: #dcfce7;
    border-left: 3px solid var(--success-color);
    padding: 0.15rem 0.5rem;
    display: block;
}

.diff-remove {
    background-color: #fee2e2;
    border-left: 3px solid var(--danger-color);
    padding: 0.15rem 0.5rem;
    display: block;
}

.diff-change {
    background-color: #fef9c3;
    border-left: 3px solid var(--warning-color);
    padding: 0.15rem 0.5rem;
    display: block;
}

/* ============================================
   Page-specific: JSON Type Colors
   ============================================ */
.json-type-string {
    color: #059669;
    font-weight: 500;
}

.json-type-number {
    color: #d97706;
    font-weight: 500;
}

.json-type-boolean {
    color: #7c3aed;
    font-weight: 500;
}

.json-type-null {
    color: #94a3b8;
    font-style: italic;
}

/* ============================================
   Page-specific: Validation Results
   ============================================ */
.result-success {
    background-color: #dcfce7;
    color: #065f46;
    border: 1px solid #a7f3d0;
    border-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.result-success i {
    font-size: 1.5rem;
    color: var(--success-color);
}

.result-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
    border-radius: var(--border-radius-sm);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.result-error i {
    font-size: 1.5rem;
    color: var(--danger-color);
}

/* ============================================
   Size comparison bar
   ============================================ */
.size-comparison {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--light-bg);
    border-radius: var(--border-radius-sm);
    margin-top: 0.75rem;
    font-size: 0.875rem;
}

.size-comparison .original {
    color: var(--text-secondary);
}

.size-comparison .arrow {
    color: var(--primary-color);
    font-weight: 700;
}

.size-comparison .compressed {
    color: var(--success-color);
    font-weight: 600;
}

.size-comparison .savings {
    background: var(--success-color);
    color: #fff;
    padding: 0.2rem 0.6rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* ============================================
   Quick query buttons
   ============================================ */
.quick-queries {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.quick-queries .btn {
    font-size: 0.8rem;
    border-radius: 20px;
    padding: 0.3rem 0.8rem;
}

/* ============================================
   Two-pane diff view
   ============================================ */
.diff-inputs {
    display: flex;
    gap: 1rem;
}

.diff-inputs > div {
    flex: 1;
    min-width: 0;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-fadeIn {
    animation: fadeIn var(--transition-normal);
}

.animate-slideUp {
    animation: slideUp var(--transition-normal);
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* ============================================
   Alert overrides
   ============================================ */
.alert {
    border-radius: var(--border-radius-sm);
    border: none;
    font-size: 0.9rem;
}

.alert-success {
    background-color: #dcfce7;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-info {
    background-color: var(--accent-light);
    color: #155e75;
    border-left: 4px solid var(--accent-color);
}

/* ============================================
   Form controls
   ============================================ */
.form-select {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-control {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ============================================
   Card overrides
   ============================================ */
.card {
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    box-shadow: var(--card-shadow);
}

.card.shadow-sm {
    box-shadow: var(--card-shadow);
}

/* ============================================
   Utility classes
   ============================================ */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.border-accent {
    border-color: var(--accent-color) !important;
}

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

.rounded-lg {
    border-radius: var(--border-radius-lg) !important;
}

/* ============================================
   Responsive - Tablet
   ============================================ */
@media (max-width: 992px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section .lead {
        font-size: 1.1rem;
    }

    .tool-input-output,
    .diff-inputs {
        flex-direction: column;
    }

    .tool-input-output > div,
    .diff-inputs > div {
        flex: none;
        width: 100%;
    }

    .stat-number {
        font-size: 2rem !important;
    }

    .features-highlight .col-md-6 {
        flex: 0 0 50%;
        max-width: 50%;
    }
}

/* ============================================
   Responsive - Mobile
   ============================================ */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .hero-section {
        padding: 2rem 0;
    }

    .hero-section h1 {
        font-size: 1.8rem;
    }

    .hero-section .lead {
        font-size: 1rem;
    }

    .hero-section .btn-lg {
        padding: 0.6rem 1.5rem;
        font-size: 0.95rem;
    }

    .container {
        padding: 0 15px;
    }

    .navbar .navbar-collapse {
        background: var(--dark);
        padding: 1rem;
        margin-top: 0.5rem;
        border-radius: var(--border-radius-sm);
    }

    .navbar .dropdown-menu {
        background: var(--dark-secondary);
        border: none;
        box-shadow: none;
        padding-left: 1rem;
    }

    .navbar .dropdown-item {
        color: rgba(255, 255, 255, 0.8);
    }

    .navbar .dropdown-item:hover {
        background-color: rgba(255, 255, 255, 0.1);
    }

    .d-flex.flex-wrap.gap-2 {
        flex-direction: column;
    }

    .d-flex.flex-wrap.gap-2 .btn {
        width: 100%;
    }

    .stat-number {
        font-size: 1.5rem !important;
    }

    .features-highlight .col-md-6 {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .related-tools .col-md-4,
    .related-tools .col-md-3 {
        flex: 0 0 100%;
        max-width: 100%;
    }

    .tool-options {
        flex-direction: column;
        align-items: stretch;
    }

    .tool-options .form-select,
    .tool-options .form-control {
        width: 100%;
    }

    .size-comparison {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .json-tree {
        max-height: 400px;
        font-size: 0.8rem;
    }

    .json-tree-path {
        flex-direction: column;
        align-items: flex-start;
    }

    h1 {
        font-size: 1.6rem;
    }

    h2 {
        font-size: 1.3rem;
    }

    h3 {
        font-size: 1.15rem;
    }

    footer .col-md-6 {
        text-align: center !important;
        margin-bottom: 0.5rem;
    }

    footer .col-md-6.text-md-end {
        text-align: center !important;
    }
}

@media (max-width: 576px) {
    .hero-section h1 {
        font-size: 1.5rem;
    }

    .hero-section .lead {
        font-size: 0.9rem;
    }

    .tool-card .card-body {
        padding: 1rem;
    }

    .btn {
        padding: 0.4rem 1rem;
        font-size: 0.85rem;
    }

    .breadcrumb {
        font-size: 0.8rem;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .navbar,
    footer,
    .hero-section,
    .friend-links-section,
    .cta-section,
    .d-flex.flex-wrap.gap-2,
    .json-tree-toolbar,
    .json-tree-path,
    .breadcrumb,
    .related-tools,
    .btn,
    .how-to-use,
    .features-section,
    .features-highlight,
    .stats-section,
    .seo-content-section,
    .friend-links-section,
    .values-section,
    .about-intro,
    .page-header {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
        font-size: 12pt;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .card {
        border: 1px solid #ddd;
        box-shadow: none;
        page-break-inside: avoid;
    }

    textarea {
        border: 1px solid #ccc;
        font-size: 10pt;
        max-height: none;
        overflow: visible;
    }

    .json-tree {
        max-height: none;
        overflow: visible;
    }

    .json-tree-children.collapsed {
        display: block !important;
    }

    a {
        color: #000;
        text-decoration: underline;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}

/* ============================================
   Scrollbar Styling
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ============================================
   Selection Styling
   ============================================ */
::selection {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* ============================================
   Focus Visible
   ============================================ */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ============================================
   Dark Mode Overrides
   ============================================ */
[data-theme="dark"] body {
    background-color: var(--light-bg);
    color: var(--text-primary);
}

[data-theme="dark"] .card {
    background-color: #1e293b;
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .card.bg-light,
[data-theme="dark"] .bg-light {
    background-color: #1e293b !important;
}

[data-theme="dark"] .bg-white,
[data-theme="dark"] .seo-content-section {
    background-color: #0f172a !important;
}

[data-theme="dark"] textarea.form-control,
[data-theme="dark"] .form-control.font-monospace {
    background-color: #1e293b;
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] textarea[readonly] {
    background-color: #1e293b;
}

[data-theme="dark"] .form-select,
[data-theme="dark"] .form-control {
    background-color: #1e293b;
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-menu {
    background-color: #1e293b;
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: rgba(96, 165, 250, 0.15);
}

[data-theme="dark"] .dropdown-header {
    color: var(--text-muted);
}

[data-theme="dark"] .dropdown-divider {
    border-color: var(--border-color);
}

[data-theme="dark"] .navbar-collapse {
    background: var(--dark);
}

[data-theme="dark"] .alert-success {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border-left-color: #34d399;
}

[data-theme="dark"] .alert-danger {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border-left-color: #f87171;
}

[data-theme="dark"] .alert-info {
    background-color: rgba(6, 182, 212, 0.15);
    color: #22d3ee;
    border-left-color: #22d3ee;
}

[data-theme="dark"] .json-tree {
    background: #1e293b;
    border-color: var(--border-color);
}

[data-theme="dark"] .size-comparison {
    background: #1e293b;
}

[data-theme="dark"] .accordion-button {
    background-color: #1e293b;
    color: var(--text-primary);
}

[data-theme="dark"] .accordion-button:not(.collapsed) {
    background-color: #1e293b;
    color: var(--primary-color);
}

[data-theme="dark"] .accordion-body {
    background-color: #1e293b;
    color: var(--text-secondary);
}

[data-theme="dark"] .accordion-item {
    background-color: #1e293b;
    border-color: var(--border-color);
}

[data-theme="dark"] ::-webkit-scrollbar-track {
    background: #1e293b;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: #475569;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

[data-theme="dark"] ::selection {
    background: var(--primary-light);
    color: var(--primary-color);
}

[data-theme="dark"] .text-muted {
    color: #94a3b8 !important;
}

[data-theme="dark"] .text-secondary {
    color: #94a3b8 !important;
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3, [data-theme="dark"] h4, [data-theme="dark"] h5 {
    color: var(--text-primary);
}

[data-theme="dark"] a {
    color: var(--primary-color);
}

[data-theme="dark"] .breadcrumb-item a {
    color: var(--text-secondary);
}

[data-theme="dark"] .breadcrumb-item.active {
    color: var(--text-primary);
}

[data-theme="dark"] .feature-icon {
    background: #1e293b;
}

[data-theme="dark"] .output-area {
    background-color: #1e293b;
}

[data-theme="dark"] .diff-add {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

[data-theme="dark"] .diff-remove {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

[data-theme="dark"] .diff-change {
    background-color: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

[data-theme="dark"] .json-type-string {
    color: #34d399;
}

[data-theme="dark"] .json-type-number {
    color: #fbbf24;
}

[data-theme="dark"] .json-type-boolean {
    color: #a78bfa;
}

[data-theme="dark"] .json-type-null {
    color: #64748b;
}

[data-theme="dark"] .json-tree-string {
    color: #34d399;
}

[data-theme="dark"] .json-tree-number {
    color: #fbbf24;
}

[data-theme="dark"] .json-tree-boolean {
    color: #a78bfa;
}

[data-theme="dark"] .json-tree-null {
    color: #64748b;
}

[data-theme="dark"] .result-success {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border-color: rgba(16, 185, 129, 0.3);
}

[data-theme="dark"] .result-error {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border-color: rgba(239, 68, 68, 0.3);
}

[data-theme="dark"] .loading-overlay {
    background: rgba(15, 23, 42, 0.85);
}

[data-theme="dark"] .friend-links-section {
    background-color: #1e293b;
}

[data-theme="dark"] .friend-links-section .btn-outline-secondary {
    color: var(--text-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .friend-links-section .btn-outline-secondary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* ============================================
   Editor Dark Mode Overrides
   ============================================ */
[data-theme="dark"] .editor-toolbar-custom {
    background: #0f172a;
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .editor-toolbar-custom .sep {
    background: var(--border-color);
}

[data-theme="dark"] .editor-sidebar {
    background: #0f172a;
    border-left-color: var(--border-color);
}

[data-theme="dark"] .sidebar-hdr {
    border-bottom-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .stat-row {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .stat-lbl {
    color: var(--text-secondary);
}

[data-theme="dark"] .editor-statusbar {
    background: #0f172a;
    border-top-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .mode-tabs {
    background: #1e293b;
}

[data-theme="dark"] .mode-tabs .mode-tab {
    color: var(--text-secondary);
}

[data-theme="dark"] .mode-tabs .mode-tab:hover {
    color: var(--text-primary);
    background: #1e293b;
}

[data-theme="dark"] .mode-tabs .mode-tab.active {
    background: var(--primary-color);
}

[data-theme="dark"] .btn-light {
    background-color: #1e293b;
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .btn-light:hover {
    background-color: #334155;
    border-color: #475569;
    color: var(--text-primary);
}

[data-theme="dark"] .btn-close {
    filter: invert(1);
}

[data-theme="dark"] .text-primary {
    color: #60a5fa !important;
}

[data-theme="dark"] .text-success {
    color: #4ade80 !important;
}

[data-theme="dark"] .text-danger {
    color: #f87171 !important;
}

/* ============================================
   Navbar Dropdown Scroll
   ============================================ */
.navbar .dropdown-menu {
    max-height: 60vh;
    overflow-y: auto;
    scrollbar-width: thin;
}

.navbar .dropdown-menu::-webkit-scrollbar {
    width: 6px;
}

.navbar .dropdown-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.navbar .dropdown-divider {
    border-color: rgba(255, 255, 255, 0.1);
}

/* ============================================
   Footer E-E-A-T Trust Badges
   ============================================ */
.footer .badge {
    font-size: 0.7rem;
    font-weight: 500;
    padding: 0.35em 0.65em;
}

[data-theme="dark"] .footer .badge {
    background-color: var(--primary-color) !important;
    color: #fff !important;
}

[data-theme="dark"] .badge {
    background-color: var(--primary-color) !important;
    color: #fff !important;
}

[data-theme="dark"] .text-dark {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .related-tools .card {
    background-color: var(--light-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .related-tools .card:hover {
    border-color: var(--primary-color);
}

[data-theme="dark"] .page-header {
    border-bottom-color: var(--border-color);
}

/* ============================================
   Theme Toggle Button
   ============================================ */
.theme-toggle {
    cursor: pointer;
    min-width: 40px;
    text-align: center;
}

.theme-toggle i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.theme-toggle:hover i {
    transform: rotate(30deg);
}