:root{--blue:#2563eb;--gray:#6b7280;--bg:#f3f4f6}*{box-sizing:border-box}body{font:16px/1.5 system-ui,sans-serif;background:var(--bg);margin:0;color:#111827}header{display:flex;justify-content:space-between;align-items:center;background:white;padding:16px 24px;box-shadow:0 1px 3px rgba(0,0,0,.08)}nav a{margin-left:12px;color:var(--blue);text-decoration:none}main{max-width:1100px;margin:24px auto;padding:0 16px}h1{font-size:1.5rem}section.card{background:white;border-radius:14px;padding:24px;margin-bottom:20px;box-shadow:0 1px 3px rgba(0,0,0,.08)}section.card.narrow{max-width:420px;margin:40px auto}section.card.wide{overflow:auto}input,textarea,select,button{font:inherit;padding:10px;border:1px solid #d1d5db;border-radius:8px;margin:6px 0;width:100%}input[type=checkbox]{width:auto}button{background:var(--blue);color:white;border:0;cursor:pointer}a.btn,button{display:inline-block;background:var(--blue);color:white;border:0;border-radius:8px;padding:10px 16px;text-decoration:none;cursor:pointer}a.btn.secondary,button.secondary{background:var(--gray)}a.back{color:var(--blue);text-decoration:none}.alert{background:#fef2f2;border:1px solid #ef4444;color:#991b1b;padding:12px;border-radius:8px;margin:12px 0}.actions{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.q{border:1px solid #e5e7eb;padding:16px;border-radius:10px;margin:12px 0}table{width:100%;border-collapse:collapse;font-size:14px}th,td{border:1px solid #e5e7eb;padding:8px;text-align:center}th{background:#f9fafb}.ok{background:#bbf7d0}.bad{background:#fecaca}.muted{color:var(--gray);font-size:13px}