:root{font-family:system-ui,sans-serif;line-height:1.5}body{margin:0;background:#f5f6f8;color:#1b1f24}.card{max-width:720px;margin:8vh auto;background:#fff;padding:2rem;border-radius:8px;box-shadow:0 1px 4px #00000014}.runner-head{display:flex;justify-content:space-between;align-items:baseline;border-bottom:1px solid #e3e6ea;padding-bottom:.75rem;margin-bottom:1rem}.runner-head strong{font-size:1.5rem;font-variant-numeric:tabular-nums}.placeholder{color:#6b7280;font-style:italic}button{background:#1b1f24;color:#fff;border:0;padding:.6rem 1.2rem;border-radius:6px;cursor:pointer}