:root{--bg:#0f172a;--panel:#1e293b;--line:#334155;--text:#e2e8f0;--muted:#94a3b8;--accent:#6366f1}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);height:100vh;display:flex;flex-direction:column}
.app-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1rem;background:var(--panel);border-bottom:1px solid var(--line)}
.app-bar h1{font-size:1.1rem;margin:0}
.app-bar__actions{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.app-bar select,.app-bar button,.app-bar input{font:inherit}
button{background:var(--accent);color:#fff;border:0;border-radius:6px;padding:.45rem .8rem;cursor:pointer}
button.secondary{background:transparent;border:1px solid var(--line);color:var(--text)}
button:hover{filter:brightness(1.1)}
select,input,textarea{background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:6px;padding:.4rem .5rem}
.workspace{flex:1;display:grid;grid-template-columns:380px 1fr;min-height:0}
.editor{padding:1rem;overflow:auto;border-right:1px solid var(--line)}
.editor h2{font-size:.9rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.field{margin-bottom:.75rem;display:flex;flex-direction:column;gap:.25rem}
.field label{font-size:.8rem;color:var(--muted)}
.sections{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.75rem}
.section-card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:.75rem}
.section-card__head{display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-bottom:.5rem}
.section-card__head strong{font-size:.85rem}
.section-card .row{display:flex;gap:.35rem}
.section-card textarea{width:100%;min-height:80px;resize:vertical}
.section-card select,.section-card input{width:100%}
.preview{min-height:0}
.preview iframe{width:100%;height:100%;border:0;background:#fff}
.icon-btn{padding:.25rem .5rem;background:transparent;border:1px solid var(--line);color:var(--muted)}
@media(max-width:860px){.workspace{grid-template-columns:1fr;grid-template-rows:1fr 1fr}.editor{border-right:0;border-bottom:1px solid var(--line)}}