:root{color-scheme:light;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{margin:0;background:#f5f6f8;color:#111827}a{color:inherit;text-decoration:none}button,input{font:inherit}.container{max-width:960px;margin:0 auto;padding:32px 20px}.card{background:white;border-radius:16px;padding:24px;box-shadow:0 10px 30px rgba(0,0,0,.08)}.grid{grid-gap:16px;gap:16px}.form,.grid{display:grid}.form{grid-gap:12px;gap:12px}.input{width:100%;padding:12px 14px;border:1px solid #d1d5db;border-radius:10px;background:#fff}.button{padding:12px 16px;border:none;border-radius:10px;cursor:pointer;background:#2563eb;color:white;font-weight:600}.button.secondary{background:#111827}.nav{gap:16px;align-items:center;justify-content:space-between;margin-bottom:24px}.nav,.row{display:flex}.row{gap:12px;flex-wrap:wrap}.muted{color:#6b7280}.error{color:#b91c1c}.success{color:#166534}