:root{--brand:#0f766e;--brand2:#14b8a6;--bg:#f0fdfa;--card:#fff;--text:#0f172a;--muted:#64748b;--warn:#b45309;--warnbg:#fef3c7;--bad:#b91c1c;--badbg:#fee2e2;--ok:#15803d;--okbg:#dcfce7}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:16px}#app{max-width:520px;margin:0 auto;min-height:100vh;padding-bottom:76px}header.top{background:var(--brand);color:#fff;padding:14px 16px 12px;position:sticky;top:0;z-index:5}header.top h1{margin:0;font-size:20px}header.top .by{font-size:12px;opacity:.85}header.top .who{font-size:13px;opacity:.9;margin-top:4px}main{padding:12px}.card{background:var(--card);border-radius:14px;padding:14px;margin-bottom:12px;box-shadow:0 1px 3px #0f172a14}.card h2{margin:0 0 8px;font-size:17px}.card h3{margin:0 0 6px;font-size:15px}.muted{color:var(--muted);font-size:13px}label{display:block;font-size:13px;color:var(--muted);margin:8px 0 4px}input,select,textarea{width:100%;font-size:16px;padding:10px 12px;border:1px solid #cbd5e1;border-radius:10px;background:#fff}button{font-size:15px;border:0;border-radius:10px;padding:10px 14px;background:var(--brand);color:#fff;cursor:pointer}button.secondary{background:#e2e8f0;color:var(--text)}button.danger{background:var(--bad)}button.small{padding:6px 10px;font-size:13px}button:disabled{opacity:.5}.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.row>*{flex:1}.row.tight>*{flex:0 0 auto}.between{display:flex;justify-content:space-between;align-items:center;gap:8px}.amount{font-weight:700;font-size:22px}.pos{color:var(--ok)}.neg{color:var(--bad)}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px;background:#e2e8f0}.badge.ok{background:var(--okbg);color:var(--ok)}.badge.warn{background:var(--warnbg);color:var(--warn)}.badge.bad{background:var(--badbg);color:var(--bad)}.alert{border-radius:10px;padding:10px 12px;margin-bottom:12px;font-size:14px}.alert.warn{background:var(--warnbg);color:var(--warn)}.alert.bad{background:var(--badbg);color:var(--bad)}.alert.ok{background:var(--okbg);color:var(--ok)}.list{list-style:none;margin:0;padding:0}.list li{padding:10px 0;border-bottom:1px solid #f1f5f9}.list li:last-child{border-bottom:0}.code{font-family:ui-monospace,monospace;font-size:22px;letter-spacing:2px;background:#f1f5f9;padding:8px 12px;border-radius:10px;display:inline-block}nav.tabs{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid #e2e8f0;display:flex;justify-content:center;z-index:10}nav.tabs .inner{display:flex;width:100%;max-width:520px}nav.tabs a{flex:1;text-align:center;padding:10px 4px 12px;font-size:12px;color:var(--muted);text-decoration:none}nav.tabs a.active{color:var(--brand);font-weight:700}nav.tabs a .ic{display:block;font-size:20px}.seg{display:flex;background:#e2e8f0;border-radius:12px;padding:4px;margin-bottom:12px}.seg button{flex:1;background:transparent;color:var(--text)}.seg button.on{background:#fff;color:var(--brand);font-weight:700}.pin{letter-spacing:8px;text-align:center;font-size:26px}.kid{display:flex;align-items:center;gap:10px}.avatar{width:40px;height:40px;border-radius:50%;background:var(--brand2);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}.toast{position:fixed;left:50%;transform:translate(-50%);bottom:86px;background:#0f172a;color:#fff;padding:10px 14px;border-radius:10px;font-size:14px;z-index:20;max-width:90%}