:root{--bg-color: #ffffff;--text-color: #000000;--accent-color: #000000;--secondary-text: #666666;--border-color: #eaeaea;--hover-bg: #fafafa;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);font-family:var(--font-sans);line-height:1.5;display:flex;flex-direction:column;height:100vh;overflow:hidden}.tui-header{border-bottom:1px solid var(--border-color);padding:12px 24px;display:flex;justify-content:space-between;align-items:center;background-color:var(--bg-color)}.logo{font-weight:700;letter-spacing:-.02em;font-size:.9rem}#plugin-nav{display:flex;gap:8px}.nav-item{cursor:pointer;padding:6px 12px;font-size:.85rem;border-radius:6px;transition:all .2s ease;color:var(--secondary-text)}.nav-item:hover{background-color:var(--hover-bg);color:var(--text-color)}.nav-item.active{background-color:var(--text-color);color:var(--bg-color)}.tui-container{flex:1;padding:40px 24px;max-width:800px;margin:0 auto;width:100%;overflow-y:auto;scrollbar-width:thin;scrollbar-color:transparent transparent}.tui-container.is-scrolling{scrollbar-color:#ccc transparent}.tui-container::-webkit-scrollbar{width:6px}.tui-container::-webkit-scrollbar-track{background:transparent}.tui-container::-webkit-scrollbar-thumb{background:transparent;border-radius:10px;transition:background .3s ease-in-out}.tui-container.is-scrolling::-webkit-scrollbar-thumb{background:#eaeaea}.tui-container.is-scrolling::-webkit-scrollbar-thumb:hover{background:#ccc}.tui-footer{border-top:1px solid var(--border-color);padding:12px 24px;font-size:.75rem;display:flex;justify-content:space-between;color:var(--secondary-text)}.footer-right{display:flex;align-items:center;gap:8px}.github-link{color:var(--secondary-text);display:flex;align-items:center;transition:color .2s}.github-link:hover{color:var(--text-color)}.tui-panel{margin-bottom:48px}.tui-panel h2{font-size:.75rem;text-transform:uppercase;letter-spacing:.1em;color:var(--secondary-text);margin-bottom:16px;font-weight:600}.tui-input-group{margin-bottom:20px}.tui-input-group label{display:block;margin-bottom:6px;font-size:.85rem;font-weight:500}.tui-input{background:var(--bg-color);border:1px solid var(--border-color);color:var(--text-color);padding:8px 12px;width:100%;font-family:var(--font-sans);font-size:.9rem;border-radius:6px;transition:border-color .2s ease}.tui-input:focus{outline:none;border-color:var(--text-color)}.tui-button{background:var(--text-color);color:var(--bg-color);border:1px solid var(--text-color);padding:8px 16px;cursor:pointer;font-family:var(--font-sans);font-size:.85rem;font-weight:500;border-radius:6px;transition:opacity .2s ease}.tui-button:hover{opacity:.8}.tui-button.secondary{background:transparent;border:1px solid var(--border-color);color:var(--text-color)}.tui-button.secondary:hover{background:var(--hover-bg);opacity:1}.sprite-preview-container{margin-top:12px;overflow-x:auto;background:#f5f5f5;padding:24px;border-radius:8px;display:flex;justify-content:center;align-items:center}canvas{image-rendering:pixelated;box-shadow:0 4px 12px #0003;background-image:conic-gradient(#999 25%,#bbb 0 50%,#999 0 75%,#bbb 0);background-size:16px 16px}.status-text{font-family:var(--font-mono);font-size:.85rem;color:var(--secondary-text)}.tui-checkbox-group{display:flex;flex-wrap:wrap;gap:16px;margin-top:8px}.tui-checkbox-item{display:flex;align-items:center;gap:6px;font-size:.85rem;cursor:pointer;color:var(--text-color)}.tui-checkbox-item input{cursor:pointer}