*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary: #0d0d12;--bg-surface: #16161f;--bg-elevated: #1e1e2a;--border: #2a2a3c;--text-primary: #e4e4f0;--text-secondary: #8888a8;--accent: #7c3aed;--accent-hover: #6d28d9;--radius: 10px}body{background:var(--bg-primary);color:var(--text-primary)}#root{display:flex;flex-direction:column;min-height:100vh;background:var(--bg-primary)}.header{position:sticky;top:0;z-index:100;background:#0d0d12d9;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);padding:0 24px;height:56px;display:flex;align-items:center;justify-content:space-between}.header-left{display:flex;align-items:center;gap:12px}.logo-mark{width:32px;height:32px;background:linear-gradient(135deg,var(--accent),#a78bfa);border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;color:#fff;letter-spacing:-.5px}.header h1{font-size:16px;font-weight:600;margin:0;color:var(--text-primary)}.header .version-badge{font-size:12px;padding:2px 8px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:4px;line-height:1.4}.header .github-link{display:flex;align-items:center;gap:6px;color:var(--text-secondary);text-decoration:none;font-size:14px;padding:6px 12px;border-radius:6px;transition:background .2s,color .2s}.header .github-link:hover{background:var(--bg-elevated);color:var(--text-primary)}.main{flex:1;padding:32px 24px;max-width:960px;width:100%;margin:0 auto}.previewer-wrap{animation:fadeUp .4s ease-out}@keyframes fadeUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.toolbar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:16px;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius) var(--radius) 0 0;border-bottom:none}.toolbar .file-input{flex:1;min-width:200px}.panel{background:var(--bg-surface);border:1px solid var(--border);border-radius:0 0 var(--radius) var(--radius);padding:20px}.panel-segment{margin-bottom:20px}.config-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.config-item{display:flex;flex-direction:column;gap:8px;padding:16px;background:var(--bg-elevated);border:1px solid var(--border);border-radius:8px}.config-item.full{grid-column:1 / -1}.code-block{border-radius:8px;overflow:hidden}.footer{padding:20px 24px;text-align:center;border-top:1px solid var(--border)}.footer a{color:var(--accent);text-decoration:none}.footer a:hover{color:#a78bfa}@media(max-width:640px){.config-grid{grid-template-columns:1fr}.toolbar{flex-direction:column}.toolbar .file-input{width:100%;min-width:unset}.main{padding:16px}.header{padding:0 16px}}