:root{color-scheme:light dark}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--hc-bg, #fff);color:var(--hc-text, #1a1a1a)}.screen{padding:20px 16px 32px;max-width:560px;margin:0 auto}.stat-row{display:flex;gap:12px;margin:20px 0}.stat{flex:1;padding:12px;border-radius:12px;background:#7f7f7f1a;text-align:center}.stat b{display:block;font-size:22px}.stat span{font-size:12px;color:var(--hc-hint, #8b8b8b)}.primary{width:100%;padding:16px;border:0;border-radius:14px;background:var(--hc-accent, #2f80ed);color:#fff;font-size:17px;font-weight:600;cursor:pointer}.primary:disabled{opacity:.5;cursor:default}.card{min-height:260px;padding:24px;border-radius:18px;background:#7f7f7f14;display:flex;flex-direction:column;justify-content:center;text-align:center;cursor:pointer;white-space:pre-line;font-size:20px;line-height:1.5}.card .topic{font-size:12px;color:var(--hc-hint, #8b8b8b);margin-bottom:12px}.card .back{font-size:17px;text-align:left}.actions{display:flex;gap:10px;margin-top:16px}.actions button{flex:1;padding:14px;border:0;border-radius:12px;font-size:16px;cursor:pointer;background:#7f7f7f24;color:inherit}.actions .like{background:#34c759;color:#fff}.actions .dislike{background:#ff3b30;color:#fff}.progress-row{display:flex;align-items:center;gap:10px;margin-bottom:16px}.progress{flex:1;height:4px;background:#7f7f7f33;border-radius:2px}.progress div{height:100%;background:var(--hc-accent, #2f80ed);border-radius:2px;transition:width .25s ease}.progress-count{font-size:13px;color:var(--hc-hint, #8b8b8b);font-variant-numeric:tabular-nums;white-space:nowrap}.hint{color:var(--hc-hint, #8b8b8b);font-size:14px;text-align:center;margin-top:12px}.offline{background:#ff9500;color:#fff;padding:8px;text-align:center;font-size:13px}.dev-main-button{position:fixed;left:16px;right:16px;bottom:16px;padding:14px;border:0;border-radius:12px;background:#2f80ed;color:#fff;font-size:16px}