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

:root {
    --primary-color: #4a90e2;
    --secondary-color: #7b68ee;
    --success-color: #52c41a;
    --error-color: #ff4d4f;
    --warning-color: #faad14;
    --info-color: #1890ff;
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --text-primary: #262626;
    --text-secondary: #8c8c8c;
    --border-color: #e8e8e8;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.95;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 10px;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.btn .icon {
    font-size: 16px;
}

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

.btn-primary:hover {
    background: #357abd;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
    background: #6a5acd;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.btn-success:hover {
    background: #45b018;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.btn-info:hover {
    background: #0d7dd8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-outline {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding: 30px;
    min-height: 500px;
}

.editor-wrapper {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    background: var(--card-bg);
    box-shadow: var(--shadow);
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

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

.stats {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.json-editor {
    flex: 1;
    padding: 16px;
    border: none;
    resize: none;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--card-bg);
    outline: none;
    min-height: 400px;
}

.json-editor:focus {
    background: #fafafa;
}

.json-output {
    flex: 1;
    padding: 16px;
    margin: 0;
    overflow: auto;
    background: #282c34;
    color: #abb2bf;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
    min-height: 400px;
}

.json-output code {
    display: block;
    white-space: pre;
}

/* JSON语法高亮 */
.json-output .key {
    color: #e06c75;
}

.json-output .string {
    color: #98c379;
}

.json-output .number {
    color: #d19a66;
}

.json-output .boolean {
    color: #56b6c2;
}

.json-output .null {
    color: #c678dd;
}

.json-output .punctuation {
    color: #abb2bf;
}

.error-message {
    margin: 0 30px 20px;
    padding: 15px 20px;
    background: #fff1f0;
    border: 1px solid #ffccc7;
    border-left: 4px solid var(--error-color);
    border-radius: 6px;
    color: var(--error-color);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.error-message::before {
    content: "⚠️";
    font-size: 20px;
}

.error-message.hidden {
    display: none;
}

.settings {
    display: flex;
    gap: 30px;
    padding: 20px 30px;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    align-items: center;
}

.setting-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
}

.setting-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.setting-group select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    background: white;
    cursor: pointer;
    outline: none;
}

.setting-group select:hover {
    border-color: var(--primary-color);
}

.setting-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.1);
}

footer {
    padding: 20px 30px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .editor-container {
        grid-template-columns: 1fr;
    }

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

    .toolbar-left,
    .toolbar-right {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    header h1 {
        font-size: 2em;
    }

    .subtitle {
        font-size: 1em;
    }

    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }

    .settings {
        flex-direction: column;
        align-items: flex-start;
    }
}

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

.json-editor::-webkit-scrollbar-track,
.json-output::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.json-editor::-webkit-scrollbar-thumb,
.json-output::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.json-editor::-webkit-scrollbar-thumb:hover,
.json-output::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

.json-output::-webkit-scrollbar-track {
    background: #1e2127;
}

.json-output::-webkit-scrollbar-thumb {
    background: #4a5568;
}

.json-output::-webkit-scrollbar-thumb:hover {
    background: #5a6578;
}