.tool-header {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(16, 185, 129, 0.1));
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
}
.tool-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}
.tool-icon-large {
    font-size: 3rem;
}
.tool-title h1 {
    margin-bottom: 0.5rem;
}
.tool-title p {
    color: var(--text-muted);
    margin: 0;
}
.controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}
.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    height: 70vh;
    min-height: 500px;
}
.editor-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}
.panel-header h3 {
    font-size: 1rem;
    margin: 0;
    color: var(--text-primary);
}
.markdown-editor {
    flex: 1;
    padding: var(--spacing-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    border: none;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: none;
    outline: none;
}
.markdown-editor:focus {
    background: rgba(15, 23, 42, 0.8);
}
.markdown-preview {
    flex: 1;
    padding: var(--spacing-md);
    background: white;
    color: #333;
    overflow-y: auto;
    font-family: var(--font-primary);
}
.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3 {
    border-bottom: 1px solid #eaecef;
    padding-bottom: 0.3em;
    margin-bottom: 16px;
    margin-top: 24px;
}
.markdown-preview h1 {
    font-size: 2em;
}
.markdown-preview h2 {
    font-size: 1.5em;
}
.markdown-preview p {
    margin-bottom: 16px;
    line-height: 1.6;
    color: #24292e;
}
.markdown-preview code {
    background-color: rgba(27, 31, 35, 0.05);
    border-radius: 3px;
    font-family: var(--font-primary);
    padding: 0.2em 0.4em;
    font-size: 85%;
}
.markdown-preview pre {
    background-color: #f6f8fa;
    border-radius: 3px;
    padding: 16px;
    overflow: auto;
    margin-bottom: 16px;
}
.markdown-preview pre code {
    background-color: transparent;
    padding: 0;
}
.markdown-preview blockquote {
    border-left: 0.25em solid #dfe2e5;
    color: #6a737d;
    padding: 0 1em;
    margin-bottom: 16px;
}
.markdown-preview ul,
.markdown-preview ol {
    padding-left: 2em;
    margin-bottom: 16px;
}
.markdown-preview img {
    max-width: 100%;
    box-sizing: content-box;
    background-color: #fff;
}
.markdown-preview table {
    border-collapse: collapse;
    margin-bottom: 16px;
    width: 100%;
}
.markdown-preview th,
.markdown-preview td {
    border: 1px solid #dfe2e5;
    padding: 6px 13px;
}
.markdown-preview tr:nth-child(2n) {
    background-color: #f6f8fa;
}
.features-info {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}
.features-info h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}
.features-info ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
}
.features-info li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
}
@media (max-width: 768px) {
    .editor-container {
        grid-template-columns: 1fr;
        height: auto;
    }
    .editor-panel {
        height: 400px;
    }
}