:root{--paper:#fdfaf3;--card:#fff;--card-edge:#eee2c8;--play:#7fb069;--accent:#f0c75e;--recite:#c56cf0;--link:#2a7fb8;--ink:#3a3530;--ink-soft:#8a8175}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font-family:-apple-system,PingFang SC,Segoe UI,sans-serif}button{cursor:pointer;background:var(--play);color:#fff;border:none;border-radius:10px;padding:8px 14px;font-size:16px}button.ghost{color:var(--link);background:0 0}.app{max-width:820px;margin:0 auto;padding:16px}