:root{
  --bg:#eef2f7; --card:#fff; --ink:#1f2733; --muted:#7b8794; --line:#e3e8ef;
  --green:#1f9d55; --green-d:#177544; --red:#e04b4b; --amber:#e0912e;
  --shadow:0 8px 24px -14px rgba(30,50,80,.35);
  --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}
a{color:#1f6fb2;text-decoration:none}
h1{font-size:23px;margin:20px 0 4px}
h2{font-size:16px;margin:0 0 14px}

/* ---------- topbar (desktop) ---------- */
.topbar{display:flex;align-items:center;gap:20px;background:#12321f;color:#eafaf0;padding:12px 20px;position:sticky;top:0;z-index:20}
.topbar .brand{font-weight:700;font-size:18px}
.topbar .brand span{color:#8fe3b0}
.topbar nav{display:flex;gap:6px;flex:1}
.topbar nav a{color:#c7e6d3;padding:7px 13px;border-radius:9px;font-weight:500;font-size:15px}
.topbar nav a.on{background:#1f9d55;color:#fff}
.topbar .who{display:flex;align-items:center;gap:12px;font-size:14px}
.topbar .who .link{background:none;border:1px solid rgba(255,255,255,.3);color:#eafaf0;padding:6px 12px;border-radius:8px;cursor:pointer;font:inherit}

/* mobile-only bits hidden on desktop */
.mtop{display:none}
.tabbar{display:none}

.wrap{max-width:1060px;margin:0 auto;padding:0 16px 40px}
.foot{text-align:center;color:var(--muted);padding:20px;font-size:12px}

/* ---------- cards ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;margin:16px 0;box-shadow:var(--shadow)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:820px){.grid2{grid-template-columns:1fr}}

/* ---------- tables ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:14.5px}
.tbl th{text-align:left;color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em;padding:8px 10px;border-bottom:2px solid var(--line)}
.tbl td{padding:10px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl tr.off{opacity:.5}
.tbl .r{text-align:right}
.nowrap{white-space:nowrap}
.actions{display:flex;gap:6px;flex-wrap:wrap}

.pill{display:inline-block;background:#eef4ff;color:#33569c;font-size:12px;padding:2px 9px;border-radius:100px;white-space:nowrap}
.muted{color:var(--muted)}.small{font-size:12.5px}
.ok{color:var(--green);font-weight:600}.debt{color:var(--red)}

/* ---------- forms ---------- */
label{display:flex;flex-direction:column;gap:5px;font-size:13.5px;color:#48515e;font-weight:600}
input,select{font:inherit;font-size:16px;padding:12px 13px;border:1px solid var(--line);border-radius:12px;background:#fbfcfe;color:var(--ink);width:100%}
input:focus,select:focus{outline:2px solid #bcd4f0;border-color:#8db6e3}
.form-row{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap}
.form-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;align-items:end}
.form-grid .wide{grid-column:1/-1}
@media(max-width:700px){.form-grid{grid-template-columns:1fr}}
.chk{flex-direction:row;align-items:center;gap:10px;font-weight:500}
.chk input{width:auto;min-width:22px;min-height:22px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:600;font-size:15px;border:none;border-radius:12px;padding:12px 18px;cursor:pointer;background:#e7edf5;color:#2b3543;min-height:44px}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:active{background:var(--green-d)}
.btn-mini{padding:8px 12px;font-size:13px;min-height:38px}
.btn-danger{background:#fdeaea;color:var(--red)}
form{margin:0}

/* ---------- login ---------- */
.login-body{display:grid;place-items:center;min-height:100vh;background:linear-gradient(160deg,#12321f,#1f9d55);padding:16px}
.login-card{background:#fff;padding:30px 24px;border-radius:18px;width:min(370px,94vw);display:flex;flex-direction:column;gap:14px;box-shadow:0 30px 60px -20px rgba(0,0,0,.4)}
.login-brand{font-size:28px;font-weight:800;text-align:center;color:#12321f}
.login-sub{text-align:center;color:var(--muted);margin:-8px 0 6px}
.alert{background:#fdeaea;color:#b03030;padding:10px 12px;border-radius:10px;font-size:14px}

/* ---------- balances ---------- */
.balances{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.bal{border:1px solid var(--line);border-radius:14px;padding:15px}
.bal.owed{background:#fff6ec;border-color:#f0d9be}
.bal.settled{background:#eefbf2;border-color:#c9ecd6}
.bal-name{font-weight:600;color:#48515e}
.bal-amount{font-size:23px;font-weight:800;margin:4px 0}
.bal.owed .bal-amount{color:var(--amber)}
.bal.settled .bal-amount{color:var(--green)}
.bal-sub{font-size:12px;color:var(--muted)}

.linkbox{width:100%;font-size:12px;font-family:ui-monospace,monospace}

/* cuenta link en topbar */
.topbar .who .acct{color:#eafaf0;font-weight:600;font-size:14px}
.okbox{background:#eefbf2;color:#177544;padding:10px 12px;border-radius:10px;font-size:14px;margin-bottom:8px}

/* comprobante */
.receipt-prev{max-width:160px;border-radius:10px;border:1px solid var(--line);margin-top:4px}
.thumb{width:46px;height:46px;object-fit:cover;border-radius:8px;border:1px solid var(--line)}

/* calendario */
.cal-head{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:16px}
.cal-head h1{margin:0;font-size:21px;min-width:170px;text-align:center}
.cal-card{padding:12px}
.cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.cal-dow{margin-bottom:6px}
.cal-dow span{text-align:center;font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase}
.cal-cell{aspect-ratio:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;
  padding-top:5px;border-radius:10px;background:#f6f8fb;color:var(--ink);font-size:14px;text-decoration:none;position:relative}
.cal-cell.empty{background:transparent}
.cal-cell.has{background:#e9f5ee;font-weight:700}
.cal-cell.today{outline:2px solid var(--green);color:var(--green-d);font-weight:800}
.cal-cell .dot{color:var(--green);font-size:9px;line-height:1;margin-top:2px;letter-spacing:-1px}
.cal-cell:active{filter:brightness(.95)}

.day-card{padding:14px 16px}
.day-card h2{margin-bottom:10px;color:var(--green-d)}
.day-ev{display:flex;gap:10px;align-items:baseline;padding:7px 0;border-bottom:1px solid #f1f4f8;font-size:14.5px}
.day-ev:last-child{border-bottom:none}
.ev-time{font-weight:700;color:var(--green);font-variant-numeric:tabular-nums;flex:0 0 auto}
.ev-who{font-weight:600;flex:0 0 auto}
.ev-text{color:#48515e}

/* ================= MOBILE (iPhone-first) ================= */
@media(max-width:720px){
  /* barra superior compacta: solo marca + salir */
  .topbar{gap:10px;padding:11px 16px;padding-top:calc(11px + env(safe-area-inset-top,0px))}
  .topbar nav{display:none}
  .topbar .who span{display:none}
  h1{font-size:21px;margin:16px 2px 2px}
  .wrap{padding:0 12px calc(84px + var(--safe-b))}  /* espacio para tabbar */
  .card{padding:16px;border-radius:14px;margin:12px 0}

  /* barra de pestañas inferior tipo app */
  .tabbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;
    background:#12321f;padding:6px 4px calc(6px + var(--safe-b));
    box-shadow:0 -6px 18px -8px rgba(0,0,0,.4)}
  .tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;
    color:#9fc7ac;font-size:11px;font-weight:600;padding:6px 2px;border-radius:12px;text-decoration:none}
  .tabbar a .ic{font-size:21px;line-height:1}
  .tabbar a.on{color:#fff;background:rgba(31,157,85,.35)}

  /* TABLAS -> TARJETAS apiladas */
  .tbl, .tbl thead, .tbl tbody, .tbl tr, .tbl td{display:block;width:100%}
  .tbl thead{display:none}
  .tbl tr{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:6px 12px}
  .tbl tr.off{opacity:.55}
  .tbl td{border:none;border-bottom:1px solid #f1f4f8;padding:8px 0;display:flex;justify-content:space-between;gap:12px;text-align:right}
  .tbl td:last-child{border-bottom:none}
  .tbl td::before{content:attr(data-l);color:var(--muted);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.03em;text-align:left;flex:0 0 auto}
  .tbl td.r{text-align:right}
  .actions{justify-content:flex-end}
  .tbl td .btn{flex:1}

  .form-grid{grid-template-columns:1fr;gap:12px}
  .form-row{flex-direction:column;align-items:stretch}
  .form-row label,.form-row .btn{width:100%}
  .btn{width:100%}
  .btn-mini{width:auto}
  .balances{grid-template-columns:1fr 1fr;gap:10px}
  .linkbox{font-size:11px}
}