:root{--bg:#f4f7fb;--card:#fff;--text:#1f2a33;--muted:#5b6b76;--line:#d9e2ea;--blue:#2ea3f2;--blue-dark:#1b7fc4;--danger:#c0392b;--ok:#1f9d6a}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,sans-serif;color:var(--text);background:var(--bg)}a{color:var(--blue)}.shell{max-width:1100px;margin:0 auto;padding:1.5rem}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:1.25rem;box-shadow:0 6px 20px rgba(20,40,60,.04)}.btn{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:6px;padding:.65rem 1rem;font-weight:700;cursor:pointer;background:var(--blue);color:#fff}.btn:hover{background:var(--blue-dark)}.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--line)}input,select,textarea{width:100%;padding:.65rem .75rem;border:1px solid var(--line);border-radius:6px;font:inherit}label{display:grid;grid-gap:.35rem;gap:.35rem;font-weight:600;margin-bottom:.85rem}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:.65rem .4rem;border-bottom:1px solid var(--line);vertical-align:top;font-size:.92rem}.muted{color:var(--muted)}.nav{display:flex;gap:1rem;align-items:center;margin-bottom:1.25rem;flex-wrap:wrap}.nav a{font-weight:700;text-decoration:none;color:var(--text)}.nav a:hover{color:var(--blue)}.error{color:var(--danger);font-weight:600}