:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #e0e0e0;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e0e0e0;
    --accent-color: #2196f3;
    --success-color: #4caf50;
    --error-color: #f44336;
    --warning-color: #ff9800;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #e0e0e0;
    --text-secondary: #9e9e9e;
    --border-color: #404040;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

html, body {
    max-width: 100vw;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 100%;
    width: 100%;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
}

header {
    background: var(--bg-primary);
    padding: 24px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    position: relative;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.theme-toggle {
    position: absolute;
    top: 24px;
    right: 24px;
}

#themeToggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

#themeToggle:hover {
    background-color: var(--bg-secondary);
}

.toolbar {
    background: var(--bg-primary);
    padding: 16px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

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

.btn-primary {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.btn-primary:hover {
    background: #1976d2;
    border-color: #1976d2;
}

.btn-success {
    background: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

.btn-success:hover {
    background: #388e3c;
    border-color: #388e3c;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.85rem;
}

.editor-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 100%;
    overflow: hidden;
}

@media (max-width: 1200px) {
    .editor-layout {
        grid-template-columns: 1fr;
    }
}

.form-panel,
.preview-panel {
    background: var(--bg-primary);
    padding: 24px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

.form-panel h2,
.preview-panel h2 {
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.form-section {
    margin-bottom: 32px;
}

.form-section h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--accent-color);
}

.help-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group input[readonly] {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

textarea {
    resize: vertical;
}

.property-list,
.resource-list,
.capability-list {
    margin-bottom: 12px;
}

.property-item,
.resource-item,
.capability-item {
    background: var(--bg-secondary);
    padding: 12px;
    border-radius: 4px;
    margin-bottom: 8px;
    display: grid;
    gap: 8px;
}

.property-item {
    grid-template-columns: 1fr 1fr auto auto;
}

.resource-item {
    grid-template-columns: 1fr 1fr 1fr auto;
}

.capability-item {
    grid-template-columns: 1fr 1fr 2fr auto;
}

@media (max-width: 768px) {
    .property-item,
    .resource-item,
    .capability-item {
        grid-template-columns: 1fr;
    }
}

.property-item input,
.resource-item input,
.capability-item input,
.capability-item select {
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.85rem;
}

.btn-remove {
    background: var(--error-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
}

.btn-remove:hover {
    background: #d32f2f;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.json-preview {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    overflow: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    height: calc(100vh - 400px);
    min-height: 500px;
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

/* JSON Syntax Highlighting */
.json-key {
    color: #0451a5;
}

[data-theme="dark"] .json-key {
    color: #9cdcfe;
}

.json-string {
    color: #a31515;
}

[data-theme="dark"] .json-string {
    color: #ce9178;
}

.json-number {
    color: #098658;
}

[data-theme="dark"] .json-number {
    color: #b5cea8;
}

.json-boolean {
    color: #0000ff;
}

[data-theme="dark"] .json-boolean {
    color: #569cd6;
}

.json-null {
    color: #0000ff;
}

[data-theme="dark"] .json-null {
    color: #569cd6;
}

.validation-results {
    margin-top: 20px;
    padding: 16px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.validation-results h3 {
    margin-bottom: 12px;
    font-size: 1rem;
}

.validation-success {
    background: #e8f5e9;
    border-color: var(--success-color);
    color: #2e7d32;
}

[data-theme="dark"] .validation-success {
    background: #1b5e20;
    color: #a5d6a7;
}

.validation-error {
    background: #ffebee;
    border-color: var(--error-color);
    color: #c62828;
}

[data-theme="dark"] .validation-error {
    background: #b71c1c;
    color: #ef9a9a;
}

.validation-warning {
    background: #fff3e0;
    border-color: var(--warning-color);
    color: #e65100;
}

[data-theme="dark"] .validation-warning {
    background: #e65100;
    color: #ffcc80;
}

.error-list,
.warning-list {
    list-style: none;
    margin-top: 8px;
}

.error-list li,
.warning-list li {
    padding: 4px 0;
    font-size: 0.85rem;
}

.error-list li::before {
    content: '❌ ';
}

.warning-list li::before {
    content: '⚠️ ';
}