:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --ink: #16191d;
  --ink-soft: #5b6572;
  --line: #e2e6eb;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --ok: #17794b;
  --warn: #9a6200;
  --bad: #b3261e;
  --chip: #eef1f5;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 8px 24px rgba(16,24,40,.06);
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c; --panel: #1b1f26; --ink: #e8ecf1; --ink-soft: #9aa5b3;
    --line: #2a313b; --accent: #4d90f0; --chip: #232a33;
    --ok: #4ac08a; --warn: #d9a13a; --bad: #f0776c;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.3);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.hidden { display: none !important; }
.muted { color: var(--ink-soft); }
.small { font-size: 13px; }
.grow { flex: 1; }
.spacer { flex: 1; }
.scroll-x { overflow-x: auto; }

/* ---------- Sign-in gate ---------- */
.gate { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.gate-card {
  background: var(--panel); padding: 32px; border-radius: 14px; box-shadow: var(--shadow);
  width: 100%; max-width: 400px; border: 1px solid var(--line);
}
.gate-mark { font-size: 34px; }
.gate-card h1 { margin: 10px 0 4px; font-size: 22px; }
.gate-card label, .stack label, form label {
  display: block; margin: 16px 0 0; font-size: 13px; font-weight: 600; color: var(--ink-soft);
}
input, select, textarea {
  width: 100%; margin-top: 6px; padding: 9px 11px; font: inherit; font-weight: 400;
  color: var(--ink); background: var(--panel);
  border: 1px solid var(--line); border-radius: 8px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
button {
  font: inherit; font-weight: 600; padding: 9px 15px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink); cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
button.primary:hover { filter: brightness(1.08); }
button.ghost { background: transparent; }
button.small { padding: 5px 10px; font-size: 13px; }
button:disabled { opacity: .5; cursor: not-allowed; }
.gate-card button { width: 100%; margin-top: 20px; padding: 11px; }
.error { color: var(--bad); font-size: 13px; margin: 14px 0 0; }
.note {
  font-size: 12.5px; color: var(--warn); background: color-mix(in srgb, var(--warn) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
  padding: 10px 12px; border-radius: 8px; margin: 16px 0 0;
}

/* ---------- Shell ---------- */
.topbar {
  display: flex; align-items: center; gap: 18px; padding: 0 20px; height: 56px;
  background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 700; display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.mark { font-size: 18px; }
.tabs { display: flex; gap: 2px; flex: 1; overflow-x: auto; }
.tab {
  border: none; background: transparent; color: var(--ink-soft); padding: 8px 13px; border-radius: 8px; white-space: nowrap;
}
.tab:hover { background: var(--chip); border-color: transparent; }
.tab.active { background: var(--chip); color: var(--ink); }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.idle { font-size: 12px; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
main { padding: 20px; max-width: 1500px; margin: 0 auto; }
.view { display: none; }
.view.active { display: block; }

.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; margin-bottom: 18px; box-shadow: var(--shadow);
}
.card.flush { padding: 0; }
.card.flush .pager { padding: 12px 16px; }
.card h2 { margin: 0 0 4px; font-size: 15px; letter-spacing: .01em; }
.card h3 { margin: 18px 0 0; font-size: 14px; }
.card > p.muted { margin-top: 0; font-size: 13.5px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---------- Stats ---------- */
.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px 16px; box-shadow: var(--shadow);
}
.stat .k { font-size: 12px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .05em; }
.stat .v { font-size: 25px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.stat .s { font-size: 12.5px; color: var(--ink-soft); }
.stat.alert .v { color: var(--bad); }
.stat.clickable { cursor: pointer; }
.stat.clickable:hover { border-color: var(--accent); }

/* ---------- Tables ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th {
  text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em;
  color: var(--ink-soft); padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap;
}
.table th.sortable { cursor: pointer; user-select: none; }
.table th.sortable:hover { color: var(--ink); }
.table td { padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.table tbody tr:hover { background: var(--chip); }
.table tbody tr.row-link { cursor: pointer; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.table.compact th, .table.compact td { padding: 7px 10px; font-size: 13px; }
.table .empty { text-align: center; color: var(--ink-soft); padding: 40px 12px; }
.peek td { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11.5px; white-space: nowrap; max-width: 190px; overflow: hidden; text-overflow: ellipsis; }
.peek tr.is-header td { background: color-mix(in srgb, var(--accent) 12%, transparent); font-weight: 700; }

/* ---------- Chips ---------- */
.chip {
  display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--chip); color: var(--ink-soft); white-space: nowrap;
}
.chip.ok   { background: color-mix(in srgb, var(--ok) 16%, transparent); color: var(--ok); }
.chip.warn { background: color-mix(in srgb, var(--warn) 18%, transparent); color: var(--warn); }
.chip.bad  { background: color-mix(in srgb, var(--bad) 14%, transparent); color: var(--bad); }
.chip.flag { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); }

/* ---------- Toolbar ---------- */
.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar input, .toolbar select { margin-top: 0; width: auto; }
.toolbar .grow { min-width: 240px; }
.check { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-soft); font-weight: 600; margin: 0 !important; white-space: nowrap; }
.check input { width: auto; margin: 0; }
.bulk {
  display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 10px 14px; margin-bottom: 14px;
  background: color-mix(in srgb, var(--accent) 10%, var(--panel)); border: 1px solid var(--accent); border-radius: var(--radius);
}
.bulk input, .bulk select { margin-top: 0; width: auto; }
.pager { display: flex; gap: 10px; align-items: center; border-top: 1px solid var(--line); }

/* ---------- Aging bars ---------- */
.bar-row { display: grid; grid-template-columns: 74px 1fr 130px; gap: 10px; align-items: center; margin: 9px 0; font-size: 13px; }
.bar { height: 20px; background: var(--chip); border-radius: 5px; overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--accent); }
.bar-row.b3 .bar span { background: var(--warn); }
.bar-row.b4 .bar span { background: var(--bad); }

/* ---------- Import ---------- */
.filepick { display: flex; align-items: center; gap: 12px; margin-top: 12px; flex-wrap: wrap; }
.filepick input[type=file] { width: auto; padding: 8px; }
.row-controls { display: flex; gap: 16px; flex-wrap: wrap; margin: 12px 0; }
.row-controls label { margin: 0; }
.row-controls select { width: auto; min-width: 180px; }
.mapping-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 12px; margin: 18px 0; }
.map-item { border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.map-item .lbl { font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 6px; }
.map-item .hint { font-size: 11.5px; color: var(--ink-soft); margin-top: 2px; min-height: 14px; }
.map-item select { margin-top: 7px; }
.map-item.matched { border-color: color-mix(in srgb, var(--ok) 50%, var(--line)); }
.actions { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; margin-top: 8px; }
.actions label { margin: 0; }
.problems { margin: 12px 0; padding: 12px 14px; border-radius: 8px;
  background: color-mix(in srgb, var(--warn) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent); font-size: 13px; }
.problems ul { margin: 6px 0 0; padding-left: 18px; }

/* ---------- Drawer ---------- */
.drawer { position: fixed; inset: 0; z-index: 50; }
.drawer-backdrop { position: absolute; inset: 0; background: rgba(10,14,20,.45); }
.drawer-panel {
  position: absolute; top: 0; right: 0; bottom: 0; width: min(620px, 100%);
  background: var(--panel); border-left: 1px solid var(--line);
  display: flex; flex-direction: column; box-shadow: -12px 0 40px rgba(0,0,0,.18);
}
.drawer-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; padding: 18px 20px; border-bottom: 1px solid var(--line); }
.drawer-head h2 { margin: 0; font-size: 19px; }
.drawer-head p { margin: 4px 0 0; font-size: 13px; }
.drawer-body { padding: 20px; overflow-y: auto; flex: 1; }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field-grid label { margin: 0; }
.field-grid .full { grid-column: 1 / -1; }
.kv { display: grid; grid-template-columns: 132px 1fr; gap: 6px 12px; font-size: 13.5px; margin: 12px 0; }
.kv dt { color: var(--ink-soft); }
.kv dd { margin: 0; }
.timeline { margin-top: 8px; border-left: 2px solid var(--line); padding-left: 14px; }
.entry { margin-bottom: 14px; }
.entry .meta { font-size: 11.5px; color: var(--ink-soft); }
.entry .body { font-size: 13.5px; white-space: pre-wrap; word-break: break-word; }
.sec-divider { margin: 22px 0 12px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-soft); }

.facts { margin: 8px 0 0; padding-left: 20px; font-size: 13.5px; color: var(--ink-soft); }
.facts li { margin: 6px 0; }
.stack { display: block; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: var(--bg); padding: 11px 18px; border-radius: 999px;
  font-size: 13.5px; font-weight: 600; z-index: 100; box-shadow: var(--shadow); max-width: 90vw; text-align: center;
}
.toast.bad { background: var(--bad); color: #fff; }

/* ---------- Status board tabs ---------- */
.board-tabs { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px; margin-bottom: 10px; }
.board-tab {
  flex: 0 0 auto; display: flex; flex-direction: column; align-items: flex-start; gap: 1px;
  padding: 8px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--panel); cursor: pointer; min-width: 116px; text-align: left;
}
.board-tab:hover { border-color: var(--accent); }
.board-tab .n { font-size: 19px; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.15; }
.board-tab .l { font-size: 11.5px; color: var(--ink-soft); text-transform: uppercase; letter-spacing: .04em; white-space: nowrap; }
.board-tab .m { font-size: 11.5px; color: var(--ink-soft); font-variant-numeric: tabular-nums; }
.board-tab.active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, var(--panel)); }
.board-tab.active .l { color: var(--accent); }
.board-tab.drop-target {
  border-color: var(--accent); border-style: dashed; background: color-mix(in srgb, var(--accent) 18%, var(--panel));
  transform: translateY(-2px);
}
.board-tab.t-denied .n { color: var(--bad); }
.board-tab.t-needs_resubmit .n { color: var(--warn); }
.board-tab.t-paid .n { color: var(--ok); }
.drag-hint { margin: 0 0 12px; }
.table tbody tr.dragging { opacity: .4; }
.table tbody tr[draggable=true] { cursor: grab; }

/* ---------- Attachments ---------- */
.dropzone {
  border: 2px dashed var(--line); border-radius: var(--radius); padding: 18px;
  text-align: center; color: var(--ink-soft); font-size: 13.5px; cursor: pointer; margin-top: 10px;
}
.dropzone:hover, .dropzone.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); color: var(--ink); }
.files { list-style: none; margin: 12px 0 0; padding: 0; }
.file-row {
  display: flex; align-items: center; gap: 10px; padding: 9px 11px;
  border: 1px solid var(--line); border-radius: 8px; margin-bottom: 8px;
}
.file-row .icon { font-size: 17px; flex: 0 0 auto; }
.file-row .info { flex: 1; min-width: 0; }
.file-row .nm { font-size: 13.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-row .meta { font-size: 11.5px; color: var(--ink-soft); }
.file-row .acts { display: flex; gap: 6px; flex: 0 0 auto; }
.upload-bar { height: 3px; background: var(--chip); border-radius: 2px; overflow: hidden; margin-top: 8px; }
.upload-bar span { display: block; height: 100%; width: 40%; background: var(--accent); animation: slide 1s linear infinite; }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(300%); } }