/* CSS Variables for theming */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #6b7280;
    --secondary-hover: #4b5563;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-overlay: rgba(0, 0, 0, 0.5);
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-inverse: #ffffff;
    
    --border-color: #e2e8f0;
    --border-focus: #3b82f6;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

/* SEO Content Styles */
.intro-section {
    margin-bottom: 0.5rem;
    padding: 2rem 0;
    text-align: center;
}

.intro-section h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.intro-section > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 0.5rem;
    line-height: 1.6;
}

.intro-section .privacy-disclaimer {
    font-size: 0.65rem;
    color: var(--success-color);
    opacity: 0.9;
    font-style: italic;
    margin: 0.25rem auto 0;
    max-width: 600px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

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

.feature-item h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* Footer */
.footer {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.9rem;
}


/* Dark theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-overlay: rgba(0, 0, 0, 0.7);
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-inverse: #0f172a;
    
    --border-color: #334155;
    --border-focus: #60a5fa;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: color 0.2s ease, background-color 0.2s ease;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 0.5rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

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

.theme-icon {
    font-size: 1.2rem;
    display: block;
}

/* Main content */
.main {
    padding: 2rem 0;
}

/* Toolbar */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

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

.btn:focus {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-inverse);
    border-color: var(--primary-color);
}

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

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

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

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.btn-success {
    background-color: #059669 !important;
    color: white !important;
    border-color: #059669 !important;
}

.btn-success:hover {
    background-color: #047857 !important;
    color: white !important;
    border-color: #047857 !important;
}

.btn-success:disabled {
    background-color: #059669 !important;
    color: white !important;
    border-color: #059669 !important;
    opacity: 1 !important;
}

/* Select */
.select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.select:focus {
    outline: none;
    border-color: var(--border-focus);
}

/* Editor container */
.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    height: 70vh;
    min-height: 500px;
}

.editor-panel {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.panel-header h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

.panel-controls {
    display: flex;
    gap: 0.5rem;
}

.editor-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.editor {
    flex: 1;
    padding: 1rem;
    border: none;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    resize: none;
    outline: none;
    white-space: pre;
    overflow-wrap: normal;
    overflow-x: auto;
    tab-size: 2;
}

.editor::placeholder {
    color: var(--text-secondary);
}

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

.editor-info {
    padding: 0.5rem 1rem;
    background-color: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Status bar */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    margin-top: 1rem;
    box-shadow: var(--shadow-sm);
}

.status-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-item span {
    font-size: 0.875rem;
}

#statusText {
    color: var(--text-secondary);
}

#errorText {
    color: var(--error-color);
    font-weight: 500;
}

#errorText:empty {
    display: none;
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-overlay);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

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

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

.loading-overlay p {
    color: var(--text-inverse);
    font-size: 1rem;
    font-weight: 500;
}

/* Syntax highlighting */
.json-string { color: #059669; }
.json-number { color: #dc2626; }
.json-boolean { color: #7c3aed; }
.json-null { color: #6b7280; }
.json-key { color: #1f2937; font-weight: 600; }
.json-punctuation { color: #374151; }

[data-theme="dark"] .json-string { color: #34d399; }
[data-theme="dark"] .json-number { color: #f87171; }
[data-theme="dark"] .json-boolean { color: #a78bfa; }
[data-theme="dark"] .json-null { color: #9ca3af; }
[data-theme="dark"] .json-key { color: #f3f4f6; }
[data-theme="dark"] .json-punctuation { color: #d1d5db; }

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .toolbar {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .tool-group {
        flex-wrap: wrap;
    }
    
    .editor-container {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .editor-panel {
        min-height: 300px;
    }
    
    .panel-header {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .panel-controls {
        align-self: stretch;
        justify-content: flex-end;
    }
}

@media (max-width: 480px) {
    .main {
        padding: 1rem 0;
    }
    
    .toolbar {
        padding: 0.5rem;
    }
    
    .header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .editor {
        font-size: 0.8rem;
    }
    
    .btn {
        padding: 0.375rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .status-bar {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
}

/* Print styles */
@media print {
    .header, .toolbar, .status-bar, .loading-overlay {
        display: none;
    }
    
    .editor-container {
        height: auto;
    }
    
    .editor-panel {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .editor {
        color: black;
        background: white;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
    }
    
    [data-theme="dark"] {
        --border-color: #ffffff;
        --text-secondary: #ffffff;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .loading-spinner {
        animation: none;
    }
}

/* Focus visible */
@media (prefers-reduced-motion: no-preference) {
    :focus-visible {
        outline: 2px solid var(--border-focus);
        outline-offset: 2px;
    }
}

/* Custom scrollbar */
.editor::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.editor::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

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

.editor::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* File drop zone */
.editor-panel.drag-over {
    background-color: var(--bg-tertiary);
    border: 2px dashed var(--primary-color);
}

.editor-panel.drag-over .editor {
    pointer-events: none;
}

/* Success and error states */
.success {
    color: var(--success-color);
}

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

.warning {
    color: var(--warning-color);
}

/* Utility classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }