:root{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background-color:#f5f5f7}body{margin:0;background-color:#f5f5f7}.app-container{max-width:960px;margin:0 auto;padding:1.5rem}.card{background:#fff;border-radius:8px;padding:1rem 1.2rem;box-shadow:0 2px 6px #0000000f;margin-bottom:1rem}.row{display:flex;flex-wrap:wrap;gap:.75rem}.col{flex:1 1 200px}.label{display:block;margin:.4rem 0 .1rem;font-size:.9rem;font-weight:500}.input{width:100%;box-sizing:border-box;padding:.4rem .5rem;border-radius:4px;border:1px solid #ccc;font-size:.9rem}.small-text{font-size:.85rem;color:#555}.hint{font-size:.8rem;color:#777;margin-top:.3rem}.badge{display:inline-block;font-size:.7rem;padding:.1rem .35rem;border-radius:999px;background:#e5e7eb;margin-left:.3rem}.radio-label{margin-right:.75rem;cursor:pointer;font-size:.85rem}.radio-label input{margin-right:.25rem}.margin-top{margin-top:.75rem}.textarea{width:100%;min-height:6rem;box-sizing:border-box;padding:.4rem .5rem;border-radius:4px;border:1px solid #ccc;font-size:.9rem;font-family:SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;white-space:pre}.buttons{margin-top:.8rem}.btn{padding:.45rem .9rem;border-radius:4px;border:none;cursor:pointer;font-size:.9rem;margin-right:.5rem}.btn-primary{background:#2563eb;color:#fff}.btn-secondary{background:#e5e7eb;color:#111827}.copy-status{font-size:.8rem;color:#16a34a;margin-left:.5rem}.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.2rem}.notice{margin-top:1rem;padding:.75rem 1rem;background:#fff7e6;border-radius:4px;border:1px solid #ffe58f;font-size:.85rem}.top-nav{display:flex;gap:.5rem;padding:.75rem 1rem;border-bottom:1px solid #eee;margin-bottom:.5rem;background:#fafafa}.nav-btn{border:1px solid #ccc;background:#fff;padding:.35rem .8rem;border-radius:4px;cursor:pointer;font-size:.9rem}.nav-btn.active{background:#007bff;border-color:#007bff;color:#fff}