/* ---------------------------------------------------------------------
   ERP design system - "ledger" theme: warm paper background, deep ink
   navy for structure, an ochre stamp-accent for primary actions and
   status marks. Tabular numerals throughout for figures.
   No external fonts or frameworks - system font stack only.
--------------------------------------------------------------------- */
:root{
  --ink:        #16233F;
  --ink-soft:   #2C3B5C;
  --paper:      #FAF7F0;
  --paper-alt:  #F1EADC;
  --paper-deep: #E9DFCB;
  --line:       #DCD2B8;
  --line-soft:  #EAE2CE;
  --text:       #1F2430;
  --text-muted: #6B6455;
  --accent:     #B5651D;
  --accent-ink: #7A4419;
  --accent-soft:#F1DDC0;
  --danger:     #A6362C;
  --danger-soft:#F3DAD6;
  --success:    #2E6F40;
  --success-soft:#DCEADA;
  --info-soft:  #DCE4EE;
  --radius:     3px;
  --shadow:     0 1px 2px rgba(22,35,63,.08), 0 4px 14px rgba(22,35,63,.06);
  font-size: 15px;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4{ font-weight: 600; letter-spacing: -0.01em; margin: 0 0 .4em; color: var(--ink); }
h1{ font-size: 1.5rem; }
h2{ font-size: 1.15rem; }
h3{ font-size: 1rem; }
p{ margin: 0 0 .8em; line-height: 1.5; }
a{ color: var(--accent-ink); }
code{ font-family: "SFMono-Regular", Consolas, monospace; }
.num, .tabular{ font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
::selection{ background: var(--accent-soft); }

button, input, select, textarea{ font: inherit; color: inherit; }

/* ---------- layout shell ---------- */
#app-shell{ display:flex; min-height:100vh; }

.sidebar{
  width: 224px; flex: 0 0 224px;
  background: var(--ink);
  color: #E9E4D8;
  display:flex; flex-direction:column;
  position: sticky; top:0; height:100vh;
}
.sidebar__brand{
  padding: 20px 18px 14px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.sidebar__brand .mark{
  display:inline-block; width:10px; height:10px; background: var(--accent);
  margin-right:8px; transform: rotate(45deg);
}
.sidebar__brand strong{ font-size: 1.05rem; letter-spacing: -0.01em; color:#fff; }
.sidebar__company{
  font-size: .78rem; color: #B9C2D6; margin-top: 6px; cursor:pointer;
  border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius);
  padding: 4px 8px; background: rgba(255,255,255,.03);
}
.sidebar__company:hover{ border-color: rgba(255,255,255,.35); }

.nav{ flex:1; overflow-y:auto; padding: 10px 0 16px; }
.nav__section{ padding: 14px 18px 6px; font-size:.72rem; color:#8792AC; letter-spacing:.03em; }
.nav__link{
  display:flex; align-items:center; gap:9px;
  padding: 8px 18px; color:#CDD4E4; text-decoration:none; font-size: .89rem;
  border-left: 3px solid transparent; cursor:pointer;
}
.nav__link:hover{ background: rgba(255,255,255,.05); color:#fff; }
.nav__link.active{ background: rgba(181,101,29,.16); border-left-color: var(--accent); color:#fff; }
.nav__dot{ width:6px; height:6px; border-radius:50%; background:#5C6788; flex:0 0 auto; }
.nav__link.active .nav__dot{ background: var(--accent); }

.sidebar__foot{
  padding: 12px 18px; border-top:1px solid rgba(255,255,255,.1);
  font-size:.82rem; color:#AEB7CC;
}
.sidebar__foot button{ color:#E9E4D8; background:none; border:none; cursor:pointer; padding:0; text-decoration:underline; }

.main{ flex:1; min-width:0; }
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  padding: 16px 28px; border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.topbar h1{ margin:0; }
.topbar__meta{ color: var(--text-muted); font-size:.85rem; margin-top:2px; }
.content{ padding: 22px 28px 60px; max-width: 1180px; }

/* ---------- cards / stat tiles ---------- */
.tiles{ display:grid; grid-template-columns: repeat(auto-fit, minmax(190px,1fr)); gap:14px; margin-bottom: 22px; }
.tile{
  background:#fff; border:1px solid var(--line-soft); border-radius: var(--radius);
  padding: 14px 16px; box-shadow: var(--shadow);
}
.tile__label{ font-size:.76rem; color: var(--text-muted); margin-bottom:6px; }
.tile__value{ font-size:1.5rem; font-weight:600; color: var(--ink); }
.tile__value.danger{ color: var(--danger); }
.tile__value.accent{ color: var(--accent-ink); }

.card{
  background:#fff; border:1px solid var(--line-soft); border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 20px;
}
.card__head{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 18px; border-bottom:1px solid var(--line-soft);
}
.card__body{ padding: 16px 18px; }

/* ---------- toolbar / filters ---------- */
.toolbar{ display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-bottom:14px; }
.toolbar .spacer{ flex:1; }
.tabs{ display:flex; border-bottom: 1px solid var(--line); margin-bottom: 16px; gap: 2px; }
.tab{
  padding: 9px 16px; cursor:pointer; color: var(--text-muted); font-size:.9rem;
  border-bottom: 2px solid transparent; margin-bottom:-1px;
}
.tab.active{ color: var(--ink); border-color: var(--accent); font-weight:600; }

/* ---------- forms ---------- */
label{ display:block; font-size:.82rem; color: var(--text-muted); margin-bottom: 4px; }
.field{ margin-bottom: 12px; }
input[type=text], input[type=number], input[type=date], input[type=password],
input[type=email], input[type=search], select, textarea{
  width:100%; padding: 8px 10px; border:1px solid var(--line);
  border-radius: var(--radius); background:#fff; font-size:.92rem;
}
input:focus, select:focus, textarea:focus, button:focus-visible{
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);
}
textarea{ resize: vertical; min-height: 60px; }
.form-row{ display:grid; grid-template-columns: repeat(auto-fit,minmax(160px,1fr)); gap: 12px; }
.checkbox{ display:flex; align-items:center; gap:8px; }
.checkbox input{ width:auto; }

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:6px;
  background: var(--ink); color:#fff; border:1px solid var(--ink);
  padding: 8px 14px; border-radius: var(--radius); cursor:pointer;
  font-size:.87rem; font-weight:500; text-decoration:none;
}
.btn:hover{ background: var(--ink-soft); }
.btn-accent{ background: var(--accent); border-color: var(--accent); }
.btn-accent:hover{ background: var(--accent-ink); }
.btn-outline{ background: transparent; color: var(--ink); border-color: var(--line); }
.btn-outline:hover{ border-color: var(--ink); }
.btn-danger{ background: #fff; color: var(--danger); border-color: var(--danger-soft); }
.btn-danger:hover{ background: var(--danger-soft); }
.btn-sm{ padding: 4px 9px; font-size:.78rem; }
.btn[disabled]{ opacity:.5; cursor:not-allowed; }
.icon-btn{ background:none; border:none; cursor:pointer; color: var(--text-muted); padding:4px; }
.icon-btn:hover{ color: var(--ink); }

/* ---------- tables ---------- */
table{ width:100%; border-collapse: collapse; font-size:.89rem; }
thead th{
  text-align:left; font-weight:600; color: var(--text-muted); font-size:.75rem;
  letter-spacing:.02em; padding: 8px 10px; border-bottom: 1px solid var(--line);
  background: var(--paper-alt);
}
tbody td{ padding: 9px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
tbody tr:hover{ background: #FCFAF4; }
td.num, th.num{ text-align:right; font-variant-numeric: tabular-nums; }
.table-empty{ padding: 30px; text-align:center; color: var(--text-muted); }
.table-wrap{ overflow-x:auto; }

/* ---------- status stamps ---------- */
.stamp{
  display:inline-block; padding: 2px 8px; font-size:.72rem; font-weight:600;
  border:1px solid; border-radius: 2px; letter-spacing:.01em;
}
.stamp-pending{ color:#8A6416; border-color:#D8B978; background: #FBF1DC; }
.stamp-processed, .stamp-paid{ color: var(--success); border-color:#9BC4A2; background: var(--success-soft); }
.stamp-cancelled, .stamp-unpaid{ color: var(--danger); border-color:#D9A9A3; background: var(--danger-soft); }
.stamp-partial{ color:#7A4419; border-color:#D8B978; background: var(--accent-soft); }

/* ---------- modal ---------- */
.modal-backdrop{
  position:fixed; inset:0; background: rgba(22,35,63,.4);
  display:flex; align-items:flex-start; justify-content:center; padding: 40px 16px;
  z-index: 100; overflow-y:auto;
}
.modal{
  background:#fff; border-radius: var(--radius); width: 100%; max-width: 640px;
  box-shadow: 0 12px 40px rgba(22,35,63,.3);
}
.modal.modal-wide{ max-width: 880px; }
.modal__head{
  display:flex; align-items:center; justify-content:space-between;
  padding: 16px 20px; border-bottom:1px solid var(--line-soft);
}
.modal__body{ padding: 18px 20px; max-height: 72vh; overflow-y:auto; }
.modal__foot{
  display:flex; justify-content:flex-end; gap:10px;
  padding: 14px 20px; border-top:1px solid var(--line-soft);
}
.modal__close{ background:none; border:none; font-size:1.3rem; cursor:pointer; color: var(--text-muted); line-height:1; }

/* ---------- searchable party picker ---------- */
.party-picker{ position:relative; }
.pp-results{
  position:absolute; z-index:20; top:100%; left:0; right:0; margin-top:2px;
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); max-height: 220px; overflow-y:auto;
}
.pp-item{ padding: 8px 10px; cursor:pointer; font-size:.88rem; border-bottom:1px solid var(--line-soft); }
.pp-item:last-child{ border-bottom:none; }
.pp-item:hover, .pp-item.active{ background: var(--paper-alt); }
.pp-empty{ padding:10px; color: var(--text-muted); font-size:.85rem; }
details.doc-more{ margin: 10px 0 4px; border:1px solid var(--line-soft); border-radius: var(--radius); }
details.doc-more summary{ padding: 8px 12px; cursor:pointer; font-size:.85rem; color: var(--text-muted); font-weight:600; }
details.doc-more .doc-more-body{ padding: 4px 12px 12px; }

/* ---------- line item editor ---------- */
.line-items table input, .line-items table select{ padding:6px 8px; font-size:.85rem; }
.line-items .totals{ display:flex; justify-content:flex-end; margin-top: 10px; }
.line-items .totals table{ width: auto; min-width: 260px; }
.line-items .totals td{ padding: 4px 10px; border:none; }
.line-items .totals tr:last-child td{ font-weight:700; font-size:1.05rem; border-top: 1px solid var(--line); }

/* ---------- misc ---------- */
.muted{ color: var(--text-muted); }
.notice{ padding: 10px 14px; border-radius: var(--radius); margin-bottom: 14px; font-size:.88rem; border:1px solid; }
.notice-error{ background: var(--danger-soft); border-color:#D9A9A3; color: var(--danger); }
.notice-success{ background: var(--success-soft); border-color:#9BC4A2; color: var(--success); }
.notice-info{ background: var(--info-soft); border-color:#B9C6DC; color: var(--ink-soft); }
.toast-wrap{ position:fixed; top:16px; right:16px; z-index:200; display:flex; flex-direction:column; gap:8px; }
.toast{ background: var(--ink); color:#fff; padding:10px 16px; border-radius: var(--radius); box-shadow: var(--shadow); font-size:.85rem; }
.toast.error{ background: var(--danger); }
.toast.success{ background: var(--success); }

/* ---------- auth page ---------- */
.auth-page{ display:flex; align-items:center; justify-content:center; min-height:100vh; background: var(--paper-alt); }
.auth-card{
  background:#fff; border:1px solid var(--line-soft); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 30px 32px; width: 100%; max-width: 380px;
}
.auth-card h1{ display:flex; align-items:center; gap:8px; }
.auth-card .btn{ width:100%; justify-content:center; margin-top:4px; }

@media (max-width: 860px){
  .sidebar{ display:none; }
  .content{ padding: 16px; }
  .topbar{ padding: 14px 16px; }
}