body{margin:0;font-family:sans-serif;background:#f8fafc;color:#1f2937}.app-shell{min-height:100vh}.header{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;border-bottom:1px solid #e5e7eb;background:#fff}main{padding:1rem}.card{background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:1rem;margin-bottom:1rem}button{border:1px solid #d1d5db;background:#fff;border-radius:6px;padding:.4rem .8rem;cursor:pointer}input,select{border:1px solid #d1d5db;border-radius:6px;padding:.4rem .6rem}.row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}