:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:#1a1a1a;background-color:#fafafa}*{box-sizing:border-box}body{margin:0;min-height:100vh}.app{max-width:720px;margin:0 auto;padding:3rem 1.5rem}.header h1{margin:0;font-size:2.25rem;font-weight:700}.subtitle{margin:.25rem 0 0;color:#666;font-size:.95rem}.main{margin-top:2.5rem}.lead{font-size:1.05rem;color:#333;margin:0 0 2rem}.counter{border:1px solid #e5e5e5;border-radius:8px;padding:1.5rem;background:#fff}.count{margin:0 0 1rem;font-size:1.25rem;font-weight:600}.counter-actions{display:flex;gap:.5rem}.counter-actions button{flex:1;padding:.5rem 1rem;font-size:1rem;border:1px solid #d4d4d4;border-radius:6px;background:#f5f5f5;cursor:pointer;transition:background .15s ease}.counter-actions button:hover{background:#ebebeb}.counter-actions button:active{background:#dedede}