:root{
  --bg:#f4f6f8; --card:#ffffff; --ink:#1a2330; --muted:#68788c; --line:#e3e8ee;
  --brand:#0f6b4f; --brand-ink:#ffffff; --accent:#0b5a8a;
  --ok:#0f6b4f; --warn:#a15c00; --bad:#b3261e; --bad-bg:#fdecea; --warn-bg:#fff4e0; --ok-bg:#e8f3ee;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:16px}
.hidden{display:none !important}
.muted{color:var(--muted)} .small{font-size:.82rem}
.error{background:var(--bad-bg);color:var(--bad);padding:8px 12px;border-radius:8px;margin:8px 0;font-size:.9rem}

/* Login */
.login-wrap{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:20px}
.login-card{background:var(--card);border-radius:var(--radius);padding:28px;width:100%;max-width:380px;box-shadow:0 8px 30px rgba(0,0,0,.08)}
.login-card h1{margin:0 0 4px;font-size:1.4rem}

/* Shell */
#shell{display:flex;flex-direction:column;min-height:100dvh}
header{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;padding:12px 16px;
  background:var(--brand);color:var(--brand-ink);font-weight:600}
header .spacer{flex:1}
header .muted{color:#cfe4dc}
main{flex:1;padding:14px 14px 90px;max-width:860px;width:100%;margin:0 auto}
nav#tabs{position:fixed;bottom:0;left:0;right:0;z-index:20;display:flex;background:var(--card);
  border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
nav#tabs button{flex:1;border:0;background:none;padding:8px 2px 6px;font-size:1.15rem;color:var(--muted);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px}
nav#tabs button span{font-size:.66rem;font-weight:600}
nav#tabs button.active{color:var(--brand)}

/* Cards & lists */
.card{background:var(--card);border-radius:var(--radius);padding:14px 16px;margin-bottom:12px;box-shadow:0 1px 3px rgba(16,24,40,.06)}
.card h2{margin:0 0 10px;font-size:1.02rem}
.card h3{margin:14px 0 6px;font-size:.92rem}
.row{display:flex;align-items:center;gap:10px}
.row .spacer{flex:1}
.list-item{display:flex;gap:10px;padding:10px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.list-item:last-child{border-bottom:0}
.list-item .grow{flex:1;min-width:0}
.list-item .title{font-weight:600;font-size:.95rem}
.list-item .sub{color:var(--muted);font-size:.8rem;margin-top:2px}
.amount{font-weight:700;white-space:nowrap;text-align:right}
.amount .cur{font-size:.72rem;color:var(--muted);font-weight:600}
.badge{display:inline-block;padding:2px 8px;border-radius:99px;font-size:.72rem;font-weight:700}
.badge.ok{background:var(--ok-bg);color:var(--ok)}
.badge.warn{background:var(--warn-bg);color:var(--warn)}
.badge.bad{background:var(--bad-bg);color:var(--bad)}
.badge.neutral{background:#eef1f5;color:var(--muted)}
.alert{padding:10px 12px;border-radius:10px;margin-bottom:8px;font-size:.9rem}
.alert.bad{background:var(--bad-bg);color:var(--bad)}
.alert.warn{background:var(--warn-bg);color:var(--warn)}

/* Buttons & forms */
.btn{border:0;border-radius:10px;padding:10px 16px;font-size:.95rem;font-weight:600;cursor:pointer;background:#e8ecf1;color:var(--ink)}
.btn.primary{background:var(--brand);color:#fff}
.btn.danger{background:var(--bad-bg);color:var(--bad)}
.btn.ghost{background:transparent;color:inherit;border:1px solid rgba(255,255,255,.4)}
.btn.small{padding:6px 10px;font-size:.8rem}
.btn.block{width:100%;margin-top:8px}
.fab-row{display:flex;gap:8px;margin-bottom:12px;flex-wrap:wrap}
label{display:block;margin:10px 0 4px;font-size:.85rem;font-weight:600;color:#334}
input,select,textarea{width:100%;padding:10px;border:1px solid var(--line);border-radius:10px;font-size:1rem;background:#fff;color:var(--ink)}
textarea{resize:vertical;min-height:60px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}
.form-grid .full{grid-column:1/-1}

/* Modal */
.modal-back{position:fixed;inset:0;background:rgba(10,20,30,.5);z-index:50;display:flex;align-items:flex-end;justify-content:center}
@media(min-width:600px){.modal-back{align-items:center}}
.modal-card{background:var(--card);border-radius:16px 16px 0 0;padding:18px;width:100%;max-width:560px;max-height:88dvh;overflow-y:auto}
@media(min-width:600px){.modal-card{border-radius:16px}}
.modal-card h2{margin:0 0 6px}

/* Tables */
table{width:100%;border-collapse:collapse;font-size:.85rem}
th,td{padding:7px 6px;text-align:left;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-size:.72rem;text-transform:uppercase;letter-spacing:.03em}
td.num,th.num{text-align:right;white-space:nowrap}

/* Socio cards */
.socio-grid{display:grid;grid-template-columns:1fr;gap:10px}
@media(min-width:600px){.socio-grid{grid-template-columns:1fr 1fr}}
.debt-line{display:flex;justify-content:space-between;font-size:.95rem;padding:3px 0}
.debt-line b.bad{color:var(--bad)} .debt-line b.ok{color:var(--ok)}
.receipt-link{font-size:.8rem;color:var(--accent);text-decoration:none;font-weight:600}
.month-nav{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.month-nav b{flex:1;text-align:center;text-transform:capitalize}
pre.wa{white-space:pre-wrap;background:#f0f3f6;border-radius:10px;padding:12px;font-size:.8rem;font-family:inherit}