/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Teal Color Scheme */
    --primary-teal: #008080;
    --light-teal: #20b2aa;
    --dark-teal: #006666;
    --teal-accent: #40e0d0;
    --pale-teal: #e0f2f1;
    
    /* Complementary Colors */
    --coral-accent: #ff7f7f;
    --warm-gray: #f5f5f5;
    --dark-gray: #333333;
    --medium-gray: #666666;
    --light-gray: #e0e0e0;
    
    /* Typography */
    --font-family-ui: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-family-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 128, 128, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 128, 128, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 128, 128, 0.2);
}

body {
    font-family: var(--font-family-ui);
    background: linear-gradient(135deg, var(--pale-teal) 0%, var(--warm-gray) 100%);
    color: var(--dark-gray);
    line-height: 1.6;
    min-height: 100vh;
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    box-shadow: var(--shadow-lg);
}

/* Header Bar */
.header-bar {
    background: linear-gradient(90deg, var(--primary-teal) 0%, var(--light-teal) 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
}

.ad-space {
    flex: 1;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}



/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-md);
    font-family: var(--font-family-ui);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

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

.btn-primary {
    background: var(--primary-teal);
    color: white;
    border: 2px solid var(--primary-teal);
}

.btn-primary:hover:not(:disabled) {
    background: var(--light-teal);
    border-color: var(--light-teal);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background: white;
    color: var(--primary-teal);
    border: 2px solid var(--primary-teal);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--pale-teal);
    transform: translateY(-1px);
}

.btn-tertiary {
    background: transparent;
    color: var(--primary-teal);
    border: 2px solid var(--light-gray);
}

.btn-tertiary:hover:not(:disabled) {
    background: var(--pale-teal);
    border-color: var(--primary-teal);
    transform: translateY(-1px);
}

/* Button Sizes */
.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
}

.btn-mini {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
}

.btn-mini .btn-icon {
    font-size: 0.9rem;
}

/* Secondary Actions */
.secondary-actions {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--warm-gray);
    border-top: 1px solid var(--light-gray);
    display: flex;
    gap: var(--spacing-xs);
    justify-content: center;
    flex-wrap: wrap;
}

/* Make New button more prominent */
#new-btn {
    background: var(--teal-accent);
    color: var(--dark-gray);
    border-color: var(--teal-accent);
    font-weight: 600;
}

#new-btn:hover {
    background: var(--light-teal);
    color: white;
    border-color: var(--light-teal);
    transform: translateY(-1px);
}

.btn-icon {
    font-size: 1rem;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

/* Workspace Container - Side by Side Layout */
.workspace-container {
    flex: 1;
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    overflow: hidden;
}

/* Left and Right Panels */
.left-panel,
.right-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: white;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.panel-header {
    background: var(--pale-teal);
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.panel-title-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.panel-header h3 {
    color: var(--primary-teal);
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.primary-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

/* Output Tabs */
.output-tabs {
    display: flex;
    gap: var(--spacing-xs);
}

.output-tabs .tab-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.85rem;
    border-bottom: none;
    background: var(--light-gray);
    color: var(--medium-gray);
    border-radius: var(--border-radius-sm);
}

.output-tabs .tab-btn.active {
    background: var(--primary-teal);
    color: white;
}

.output-tabs .tab-btn:hover {
    background: var(--light-teal);
    color: white;
}

/* Input and Output Sections */
.input-section,
.output-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    overflow: hidden;
}

/* Text Input and Output */
.text-input,
.text-output {
    flex: 1;
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--light-teal);
    border-radius: var(--border-radius-md);
    font-family: var(--font-family-mono);
    font-size: 0.9rem;
    line-height: 1.4;
    background: var(--pale-teal);
    color: var(--dark-gray);
    resize: none;
    transition: all 0.2s ease;
}

.text-input:focus {
    outline: none;
    border-color: var(--primary-teal);
    background: white;
    box-shadow: var(--shadow-sm);
}

.text-output {
    background: white;
    border-color: var(--light-gray);
}

.text-input::placeholder {
    color: var(--medium-gray);
    font-style: italic;
}

/* Input Actions */
.input-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    justify-content: flex-end;
}

/* Output Placeholder */
.output-placeholder {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--medium-gray);
}

.placeholder-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.output-placeholder h3 {
    color: var(--primary-teal);
    margin-bottom: var(--spacing-sm);
}

.output-placeholder p {
    max-width: 300px;
}

/* Brand Section */
.brand-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.logo-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.brand-link:hover {
    color: white;
}

.brand-icon {
    font-size: 1rem;
}

.input-options {
    margin-bottom: var(--spacing-lg);
}

.input-tabs {
    display: flex;
    gap: var(--spacing-xs);
    border-bottom: 2px solid var(--light-gray);
}

.tab-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    background: transparent;
    color: var(--medium-gray);
    font-family: var(--font-family-ui);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

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

.tab-btn.active {
    color: var(--primary-teal);
    border-bottom-color: var(--primary-teal);
}

.input-section {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Paste Section */
.paste-zone {
    width: 100%;
    max-width: 800px;
    text-align: center;
}

.paste-zone h2 {
    color: var(--primary-teal);
    margin-bottom: var(--spacing-sm);
}

.paste-zone p {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-lg);
}

.json-input {
    width: 100%;
    min-height: 300px;
    padding: var(--spacing-md);
    border: 2px solid var(--light-teal);
    border-radius: var(--border-radius-md);
    font-family: var(--font-family-mono);
    font-size: 0.9rem;
    line-height: 1.4;
    background: var(--pale-teal);
    color: var(--dark-gray);
    resize: vertical;
    transition: all 0.2s ease;
}

.json-input:focus {
    outline: none;
    border-color: var(--primary-teal);
    background: white;
    box-shadow: var(--shadow-sm);
}

.json-input::placeholder {
    color: var(--medium-gray);
    font-style: italic;
}

.paste-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

/* Upload Area */
.upload-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.upload-zone {
    text-align: center;
    padding: var(--spacing-xl);
    border: 2px dashed var(--light-teal);
    border-radius: var(--border-radius-lg);
    background: var(--pale-teal);
    transition: all 0.3s ease;
    max-width: 400px;
    width: 100%;
}

.upload-zone:hover {
    border-color: var(--primary-teal);
    background: rgba(64, 224, 208, 0.1);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.upload-zone.dragover {
    border-color: var(--primary-teal);
    background: rgba(64, 224, 208, 0.2);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.upload-zone h2 {
    color: var(--primary-teal);
    margin-bottom: var(--spacing-sm);
}

.upload-zone p {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-lg);
}

/* Tree Panel */
.tree-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.tree-container {
    flex: 1;
    overflow: auto;
    padding: var(--spacing-lg);
    font-family: var(--font-family-mono);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* Tree Node Styles */
.tree-node {
    margin: 1px 0;
    position: relative;
}

.tree-node-content {
    display: flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.tree-node-content:hover {
    background: var(--pale-teal);
    transform: translateX(2px);
}

.tree-node-toggle {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-xs);
    cursor: pointer;
    color: var(--primary-teal);
    font-weight: bold;
    font-size: 0.8rem;
    transition: transform 0.2s ease;
}

.tree-node-toggle:hover {
    transform: scale(1.2);
    color: var(--light-teal);
}

.tree-node-icon {
    margin-right: var(--spacing-xs);
    font-size: 0.9rem;
    opacity: 0.8;
}

.tree-node-key {
    color: var(--primary-teal);
    font-weight: 600;
    margin-right: var(--spacing-xs);
}

.tree-node-separator {
    color: var(--medium-gray);
    margin-right: var(--spacing-xs);
    font-weight: bold;
}

.tree-node-value {
    color: var(--dark-gray);
    font-weight: 500;
}

/* Data type specific colors */
.tree-node-value.string {
    color: #d73a49;
}

.tree-node-value.number {
    color: #005cc5;
    font-weight: 600;
}

.tree-node-value.boolean {
    color: #e36209;
    font-weight: 600;
}

.tree-node-value.null {
    color: #6f42c1;
    font-style: italic;
    opacity: 0.8;
}

.tree-node-value.object,
.tree-node-value.array {
    color: var(--medium-gray);
    font-style: italic;
    font-size: 0.85rem;
}

.tree-node-children {
    margin-left: var(--spacing-lg);
    border-left: 2px solid var(--light-gray);
    padding-left: var(--spacing-md);
    position: relative;
}

.tree-node-children::before {
    content: '';
    position: absolute;
    left: -2px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--light-teal), transparent);
    opacity: 0.3;
}

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

.tree-node-content.highlighted {
    background: var(--teal-accent);
    color: var(--dark-gray);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

/* Animation for expanding/collapsing */
.tree-node-children {
    animation: expandNode 0.2s ease-out;
}

@keyframes expandNode {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Depth indicators */
.tree-node[data-depth="0"] .tree-node-content {
    font-weight: 600;
}

.tree-node[data-depth="1"] .tree-node-content {
    padding-left: calc(var(--spacing-sm) + 4px);
}

.tree-node[data-depth="2"] .tree-node-content {
    padding-left: calc(var(--spacing-sm) + 8px);
}

/* Responsive tree styles */
@media (max-width: 768px) {
    .tree-node-children {
        margin-left: var(--spacing-md);
        padding-left: var(--spacing-sm);
    }
    
    .tree-node-toggle {
        width: 20px;
        height: 20px;
        font-size: 0.9rem;
    }
    
    .tree-node-content {
        padding: var(--spacing-sm);
    }
}

/* Error Display */
.error-display {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border: 1px solid var(--coral-accent);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    z-index: 1000;
}

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

.error-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.error-message {
    color: var(--coral-accent);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

/* Loading Indicator */
.loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    z-index: 999;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--light-gray);
    border-top: 4px solid var(--primary-teal);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

/* Status Bar */
.status-bar {
    background: var(--warm-gray);
    border-top: 1px solid var(--light-gray);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.85rem;
    color: var(--medium-gray);
}

.status-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-separator {
    color: var(--light-gray);
}

.status-valid {
    color: var(--primary-teal);
    font-weight: 500;
}

.status-invalid {
    color: var(--coral-accent);
    font-weight: 500;
}

/* Notification Toast */
.notification-toast {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--primary-teal);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    animation: slideIn 0.3s ease;
}

.notification-toast.success {
    background: var(--primary-teal);
}

.notification-toast.error {
    background: var(--coral-accent);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toast-icon {
    font-size: 1.1rem;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}



/* Responsive Design */
@media (max-width: 768px) {
    /* Mobile: Stack panels vertically */
    .workspace-container {
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    .left-panel,
    .right-panel {
        min-height: 300px;
    }
    
    .panel-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }
    
    .panel-title-section {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .primary-actions {
        justify-content: center;
    }
    
    .secondary-actions {
        justify-content: center;
        gap: var(--spacing-xs);
    }
    
    .input-tabs,
    .output-tabs {
        justify-content: center;
    }
    .header-content {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    
    .brand-section {
        text-align: center;
    }
    
    .ad-space {
        min-height: 20px;
    }
    
    .btn-small,
    .btn-mini {
        font-size: 0.75rem;
        padding: 4px 8px;
    }
    
    .upload-zone {
        padding: var(--spacing-lg);
    }
    
    .input-area {
        padding: var(--spacing-md);
    }
    
    .input-actions {
        flex-direction: column;
    }
    
    .text-input,
    .text-output {
        min-height: 200px;
        font-size: 0.8rem;
    }
    
    .tree-container {
        padding: var(--spacing-md);
        font-size: 0.8rem;
    }
    
    .tree-node-children {
        margin-left: var(--spacing-md);
        padding-left: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .status-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .status-separator {
        display: none;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Styles */
.btn:focus,
.tree-node-content:focus {
    outline: 2px solid var(--teal-accent);
    outline-offset: 2px;
}

/* Recovery Modal */
.recovery-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(4px);
}

.recovery-content {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

.recovery-header {
    background: linear-gradient(90deg, var(--primary-teal) 0%, var(--light-teal) 100%);
    color: white;
    padding: var(--spacing-lg);
    text-align: center;
}

.recovery-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.recovery-header h3 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 600;
}

.recovery-body {
    padding: var(--spacing-lg);
    text-align: center;
}

.recovery-body p {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.recovery-info {
    background: var(--pale-teal);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    color: var(--primary-teal);
    font-size: 0.9rem;
    font-weight: 500;
}

.recovery-actions {
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    border-top: 1px solid var(--light-gray);
}

.recovery-actions .btn {
    flex: 1;
    max-width: 150px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Footer */
.footer {
    background: var(--dark-gray);
    color: white;
    padding: var(--spacing-lg);
    text-align: center;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    margin: var(--spacing-xs) 0;
    font-size: 0.9rem;
}

.footer-content a {
    color: var(--teal-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-content a:hover {
    color: var(--light-teal);
    text-decoration: underline;
}

.footer-note {
    color: var(--medium-gray);
    font-size: 0.85rem;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-teal: #004d4d;
        --light-teal: #006666;
        --dark-gray: #000000;
        --medium-gray: #333333;
    }
}