/* ── Design tokens ─────────────────────────────────────────
   A calm, legible utility palette for daily use on a phone
   between visits. Deep slate-teal for trust/structure, a warm
   clay accent for action, soft sage for "good" states.
   ─────────────────────────────────────────────────────────── */
:root{
  --ink:        #1f2b2e;
  --ink-soft:   #4c5c60;
  --paper:      #f6f4ef;
  --paper-raised: #ffffff;
  --line:       #e1ddd2;
  --teal:       #1f4a48;
  --teal-dark:  #16332f;
  --clay:       #c1613f;
  --clay-soft:  #f2ded4;
  --sage:       #4f7a5c;
  --sage-soft:  #e2ecdf;
  --amber:      #b8862c;
  --amber-soft: #f5e9d2;
  --danger:     #b5433b;
  --danger-soft:#f5ddd8;

  --radius: 10px;
  --shadow: 0 1px 2px rgba(31,43,46,.06), 0 4px 14px rgba(31,43,46,.05);
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:var(--font-body);
  background:var(--paper);
  color:var(--ink);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--teal)}
h1,h2,h3{font-family:var(--font-display); font-weight:600; color:var(--teal-dark); margin:0 0 .4em}
h1{font-size:1.7rem}
h2{font-size:1.3rem}
h3{font-size:1.05rem}
p{margin:.3em 0}

/* ── App shell ── */
.app{
  display:grid;
  grid-template-columns: 220px 1fr;
  grid-template-rows: 56px 1fr;
  grid-template-areas: "topbar topbar" "nav content";
  min-height:100vh;
}
.topbar{
  grid-area: topbar;
  background:var(--teal-dark);
  color:#fff;
  display:flex;
  align-items:center;
  gap:.75rem;
  padding:0 1rem;
  position:sticky; top:0; z-index:20;
}
.topbar .brand{
  color:#fff; text-decoration:none; font-family:var(--font-display); font-weight:600; font-size:1.05rem;
  border-left:3px solid var(--clay);
  padding-left:.6rem;
}
.logout-link{margin-left:auto; color:#e6e1d3; text-decoration:none; font-size:.9rem}
.logout-link:hover{color:#fff}
.nav-toggle{
  display:none; background:none; border:0; color:#fff; font-size:1.3rem; cursor:pointer; padding:.2rem .4rem;
}

.sidenav{
  grid-area: nav;
  background:var(--teal);
  padding:1rem .5rem;
  display:flex; flex-direction:column; gap:.15rem;
}
.sidenav a{
  color:#e6efee; text-decoration:none; padding:.6rem .8rem; border-radius:8px; font-size:.95rem;
}
.sidenav a:hover{background:rgba(255,255,255,.08)}
.sidenav a.active{background:var(--clay); color:#fff; font-weight:600}

.content{grid-area:content; padding:1.25rem 1.5rem 3rem; max-width:1100px}

/* ── Flash messages ── */
.flash{padding:.7rem 1rem; border-radius:var(--radius); margin-bottom:1rem; font-size:.95rem}
.flash-success{background:var(--sage-soft); color:#2e4a35; border:1px solid var(--sage)}
.flash-error{background:var(--danger-soft); color:#6e2620; border:1px solid var(--danger)}

/* ── Cards / panels ── */
.card{
  background:var(--paper-raised);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:1.1rem 1.2rem;
  margin-bottom:1.1rem;
}
.card-header{display:flex; align-items:center; justify-content:space-between; margin-bottom:.6rem; flex-wrap:wrap; gap:.5rem}

.stat-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:.8rem; margin-bottom:1.2rem}
.stat{
  background:var(--paper-raised); border:1px solid var(--line); border-radius:var(--radius);
  padding:.9rem 1rem; box-shadow:var(--shadow);
}
.stat .num{font-family:var(--font-display); font-size:1.6rem; font-weight:700; color:var(--teal-dark)}
.stat .label{font-size:.8rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.04em}
.stat.accent{border-left:4px solid var(--clay)}
.stat.warn .num{color:var(--amber)}
.stat.danger .num{color:var(--danger)}

/* ── Forms ── */
label{display:block; font-size:.85rem; color:var(--ink-soft); margin-bottom:.25rem; margin-top:.7rem}
input[type=text],input[type=password],input[type=number],input[type=date],
input[type=time],input[type=email],select,textarea{
  width:100%; padding:.55rem .65rem; border:1px solid var(--line); border-radius:8px;
  font-size:1rem; font-family:inherit; background:#fff; color:var(--ink);
}
textarea{min-height:70px; resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--teal); outline-offset:1px}
.form-row{display:grid; grid-template-columns:1fr 1fr; gap:1rem}
@media (max-width:640px){.form-row{grid-template-columns:1fr}}
.form-actions{margin-top:1rem; display:flex; gap:.6rem; flex-wrap:wrap}
.hint{font-size:.8rem; color:var(--ink-soft); margin-top:.2rem}

/* ── Buttons ── */
.btn{
  display:inline-block; padding:.55rem 1.1rem; border-radius:8px; border:1px solid transparent;
  background:var(--teal); color:#fff; text-decoration:none; font-size:.95rem; font-weight:600;
  cursor:pointer; font-family:inherit;
}
.btn:hover{background:var(--teal-dark)}
.btn-accent{background:var(--clay)}
.btn-accent:hover{background:#a44f32}
.btn-ghost{background:transparent; border:1px solid var(--line); color:var(--ink)}
.btn-ghost:hover{background:var(--paper)}
.btn-danger{background:var(--danger)}
.btn-danger:hover{background:#93342d}
.btn-sm{padding:.35rem .7rem; font-size:.85rem}

/* ── Tables ── */
table{width:100%; border-collapse:collapse; font-size:.92rem}
th,td{text-align:left; padding:.55rem .5rem; border-bottom:1px solid var(--line)}
th{color:var(--ink-soft); font-weight:600; font-size:.78rem; text-transform:uppercase; letter-spacing:.03em}
tr:hover td{background:rgba(31,74,72,.03)}
.table-wrap{overflow-x:auto}

/* ── Badges ── */
.badge{display:inline-block; padding:.2rem .55rem; border-radius:99px; font-size:.78rem; font-weight:600}
.badge-ok{background:var(--sage-soft); color:#2e4a35}
.badge-warning{background:var(--amber-soft); color:#7a5817}
.badge-danger{background:var(--danger-soft); color:#6e2620}
.badge-muted{background:#eee; color:#666}
.badge-pending{background:var(--amber-soft); color:#7a5817}
.badge-paid{background:var(--sage-soft); color:#2e4a35}

/* ── Login page ── */
.login-wrap{
  min-height:100vh; display:flex; align-items:center; justify-content:center;
  background:linear-gradient(160deg, var(--teal-dark), var(--teal));
  padding:1rem;
}
.login-card{
  background:var(--paper-raised); border-radius:14px; box-shadow:0 20px 50px rgba(0,0,0,.25);
  padding:2.2rem 2rem; width:100%; max-width:360px;
}
.login-card h1{font-size:1.4rem; border-left:4px solid var(--clay); padding-left:.6rem}
.login-card .sub{color:var(--ink-soft); font-size:.9rem; margin-bottom:1rem}

/* ── Empty states ── */
.empty{
  text-align:center; padding:2.5rem 1rem; color:var(--ink-soft);
  border:1px dashed var(--line); border-radius:var(--radius); background:var(--paper-raised);
}

/* ── Invoice print view ── */
.invoice-sheet{
  background:#fff; max-width:720px; margin:0 auto; padding:2rem;
  border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow);
}
.invoice-head{display:flex; justify-content:space-between; align-items:flex-start; border-bottom:3px solid var(--teal); padding-bottom:1rem; margin-bottom:1rem}
.invoice-head h1{margin:0}
.invoice-meta{text-align:right; font-size:.9rem; color:var(--ink-soft)}
.invoice-total-row td{font-weight:700; font-size:1.05rem; border-top:2px solid var(--teal); border-bottom:none}
.payment-details{margin-top:1.5rem; padding:1rem 1.1rem; background:var(--paper); border:1px solid var(--line); border-radius:var(--radius)}
.payment-details h3{margin-bottom:.5rem}
.payment-details p{margin:.25rem 0; font-size:.9rem}
.no-print{margin-top:1.2rem}

@media print{
  .topbar,.sidenav,.no-print{display:none !important}
  .app{display:block}
  .content{padding:0; max-width:none}
  body{background:#fff}
  .invoice-sheet{box-shadow:none; border:none; max-width:none}
}

/* ── Responsive nav ── */
@media (max-width: 820px){
  .app{grid-template-columns: 1fr; grid-template-areas:"topbar" "content";}
  .nav-toggle{display:inline-block}
  .sidenav{
    position:fixed; top:56px; left:0; bottom:0; width:220px; overflow-y:auto;
    transform:translateX(-100%); transition:transform .2s ease; z-index:30;
  }
  .sidenav.open{transform:translateX(0); box-shadow:4px 0 16px rgba(0,0,0,.2)}
  .content{padding:1rem}
}