:root{--green:#2f7d32;--green-light:#e6f4e6;--yellow:#c9e13a;--red:#c0392b;--red-light:#fdecea;--gray-bg:#f5f6f7;--card-bg:#fff;--text:#1c2321;--text-muted:#6b7570;--border:#e2e5e2;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}*{box-sizing:border-box}body{background:var(--gray-bg);color:var(--text);margin:0}#root{flex-direction:column;min-height:100vh;display:flex}.app-shell{width:100%;max-width:640px;margin:0 auto;padding:0 16px 48px}.navbar{background:var(--green);color:#fff;padding:14px 16px}.navbar-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;max-width:640px;margin:0 auto;display:flex}.navbar-title{align-items:center;gap:8px;font-size:1.1rem;font-weight:700;display:flex}.navbar-tabs{gap:6px;display:flex}.navbar-tabs button{color:#fff;cursor:pointer;background:0 0;border:1px solid #fff6;border-radius:20px;padding:6px 12px;font-size:.85rem}.navbar-tabs button.active{color:var(--green);background:#fff;font-weight:600}.navbar-signout{color:#ffffffd9;cursor:pointer;background:0 0;border:none;font-size:.8rem;text-decoration:underline}.login-wrap{background:var(--card-bg);text-align:center;border-radius:16px;max-width:380px;margin:80px auto;padding:32px 24px;box-shadow:0 2px 10px #0000000f}.login-wrap h1{margin-bottom:4px;font-size:1.4rem}.login-wrap p.subtitle{color:var(--text-muted);margin-bottom:24px;font-size:.9rem}.login-wrap input{border:1px solid var(--border);border-radius:8px;width:100%;margin-bottom:12px;padding:10px 12px;font-size:1rem}.login-wrap p.notice a{color:var(--green);font-weight:600;text-decoration:none}.login-wrap p.notice a:hover{text-decoration:underline}.btn{background:var(--green);color:#fff;cursor:pointer;border:none;border-radius:8px;width:100%;padding:10px 18px;font-size:.95rem;font-weight:600;display:inline-block}.btn:disabled{opacity:.6;cursor:default}.btn.secondary{color:var(--green);border:1px solid var(--green);background:#fff}.btn.danger{background:var(--red)}.btn.small{width:auto;padding:6px 12px;font-size:.85rem}.notice{color:var(--green);margin-top:14px;font-size:.85rem}.error{color:var(--red);margin-top:14px;font-size:.85rem}.section{margin-top:24px}.section h2{text-transform:uppercase;letter-spacing:.03em;color:var(--text-muted);margin-bottom:10px;font-size:1rem}.card{background:var(--card-bg);border-radius:14px;margin-bottom:12px;padding:16px;box-shadow:0 1px 4px #0000000d}.balance-hero{background:var(--green);color:#fff;text-align:center;border-radius:16px;margin-top:20px;padding:24px}.balance-hero .amount{font-size:2.4rem;font-weight:700}.balance-hero .label{opacity:.85;font-size:.85rem}.balance-hero.low{background:var(--red)}.member-row{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:8px 0;font-size:.92rem;display:flex}.member-row:last-child{border-bottom:none}.member-row .name{align-items:center;gap:6px;display:flex}.badge{background:var(--green-light);color:var(--green);border-radius:10px;padding:2px 7px;font-size:.7rem;font-weight:600}.badge.low{background:var(--red-light);color:var(--red)}.session-card .top-row{justify-content:space-between;align-items:baseline;display:flex}.session-card .date{font-size:1.05rem;font-weight:700}.session-card .meta{color:var(--text-muted);margin-top:2px;font-size:.85rem}.session-card .attendees{color:var(--text-muted);margin-top:10px;font-size:.85rem}.session-card .actions{gap:8px;margin-top:12px;display:flex}.pill{background:var(--green-light);color:var(--green);border-radius:20px;margin:2px 4px 2px 0;padding:3px 10px;font-size:.75rem;display:inline-block}form.stack{flex-direction:column;gap:10px;display:flex}form.stack label{color:var(--text-muted);margin-bottom:-6px;font-size:.8rem}form.stack input,form.stack select,form.stack textarea{border:1px solid var(--border);border-radius:8px;width:100%;padding:9px 10px;font-family:inherit;font-size:.95rem}.row{gap:10px;display:flex}.row>*{flex:1}.muted{color:var(--text-muted);font-size:.85rem}.tx-row{border-bottom:1px solid var(--border);justify-content:space-between;padding:6px 0;font-size:.85rem;display:flex}.tx-row:last-child{border-bottom:none}.tx-amount.pos{color:var(--green);font-weight:600}.tx-amount.neg{color:var(--red);font-weight:600}.loading{text-align:center;color:var(--text-muted);padding:40px 0}.tabbar{gap:8px;margin-top:16px;margin-bottom:16px;display:flex}.tabbar button{border:1px solid var(--border);cursor:pointer;background:#fff;border-radius:8px;flex:1;padding:8px;font-size:.85rem}.tabbar button.active{background:var(--green);color:#fff;border-color:var(--green)}