:root{color:#111;background:#f6f7fb;font-family:Arial,Helvetica,sans-serif;line-height:1.5}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}#app{max-width:960px;margin:0 auto;padding:2rem 1rem 4rem}.page-header{margin-bottom:2rem}.layout{gap:1.5rem;display:grid}.panel{background:#fff;border:1px solid #ddd;border-radius:12px;padding:1rem}.field{gap:.35rem;margin-bottom:1rem;display:grid}.actions,.toolbar,.card-header,.card-actions{align-items:center;gap:.75rem;display:flex}.actions,.toolbar{flex-wrap:wrap}.cards-list{gap:1rem;display:grid}.card{border:1px solid #ddd;border-radius:10px;padding:1rem}.card-header{justify-content:space-between}.card-meta{color:#555;font-size:.9rem}.card-content{white-space:pre-wrap}.field-error{color:#b00020;min-height:1.25rem;margin:0;font-size:.9rem}.empty-state{color:#555}