:root {
    --primary-color: #007bff;
    --secondary-color: #4CAF50;
    --dark-color: #333;
    --light-color: #fff;
    --gray-color: #666;
    --light-gray: #f8f9fa;
    --border-color: #e0e0e0;
    --border-light: #ccc;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.15);
}

body.dark-mode {
    --primary-color: #4a90e2;
    --secondary-color: #27ae60;
    --dark-color: #ecf0f1;
    --light-color: #2c3e50;
    --gray-color: #bdc3c7;
    --light-gray: #34495e;
    --border-color: #4a5568;
    --border-light: #4a5568;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.json-formatter-section {
    padding: 20px 0;
}

.workspace {
    display: flex;
    gap: 20px;
    margin: 30px 0;
    height: 600px;
}

.input-panel,
.output-panel {
    flex: 1;
    background: var(--light-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--light-gray);
    border-radius: 8px 8px 0 0;
}

.panel-header h3 {
    margin: 0;
    color: var(--dark-color);
    font-size: 16px;
    font-weight: 600;
}

.action-buttons {
    display: flex;
    gap: 10px;
}

.action-btn {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: background-color 0.3s, transform 0.2s;
}

.action-btn:hover {
    background-color: #45a049;
}

.action-btn:active {
    transform: scale(0.98);
}

#json-input {
    flex: 1;
    width: 100%;
    box-sizing: border-box;
    resize: none;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    padding: 15px;
    border: none;
    outline: none;
    background: var(--light-gray);
    color: var(--dark-color);
}

.json-tree {
    flex: 1;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    padding: 15px;
    overflow: auto;
    background: var(--light-gray);
    color: var(--dark-color);
}

.json-object,
.json-array {
    display: none;
}

.json-array.active,
.json-object.active {
    display: flex;
    flex-direction: column;
    margin-left: 20px;
}

.bracket_left,
.bracket_right {
    color: var(--gray-color);
}

.bracket_left::before {
    cursor: pointer;
    content: "+";
    color: #e74c3c;
    margin-right: 5px;
}

.bracket_left.active::before {
    content: "-";
}

.json-key {
    color: #9b59b6;
    font-weight: bold;
}

.json-value {
    color: var(--secondary-color);
}

.json-value-number {
    color: #3498db;
}

.json-string {
    color: #e67e22;
}

.json-item {
    margin-left: 20px;
}

.json-item:not(:last-child) {
    margin-bottom: 5px;
}

.sep,
.comma {
    color: var(--gray-color);
}

.feature-section {
    margin-top: 40px;
    padding: 20px;
    background: var(--light-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.feature-section h3 {
    margin-top: 0;
    color: var(--dark-color);
    margin-bottom: 20px;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-color);
}

.feature-item i {
    color: var(--secondary-color);
    font-size: 18px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .workspace {
        flex-direction: column;
        height: auto;
    }

    .input-panel,
    .output-panel {
        height: 400px;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        flex-wrap: wrap;
    }

    .action-btn {
        font-size: 12px;
        padding: 6px 10px;
    }
}

@media (max-width: 480px) {
    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .action-buttons {
        width: 100%;
        justify-content: space-between;
    }

    .input-panel,
    .output-panel {
        height: 350px;
    }
}

/* 滚动条样式 */
.json-tree::-webkit-scrollbar,
#json-input::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.json-tree::-webkit-scrollbar-track,
#json-input::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: 4px;
}

.json-tree::-webkit-scrollbar-thumb,
#json-input::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.json-tree::-webkit-scrollbar-thumb:hover,
#json-input::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}