:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --border: #d8dce2;
  --text: #1f2430;
  --muted: #6b7280;
  --accent: #2f6fed;
  --accent-dark: #1f4fb8;
  --warn: #b45309;
  --warn-bg: #fff7ed;
  --danger: #b91c1c;
  --danger-bg: #fef2f2;
  --ok: #15803d;
  --ok-bg: #f0fdf4;
  --selected: #dbeafe;
  --header-bg: #eef1f6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

#app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
#app-header h1 { font-size: 18px; margin: 0; }
.header-controls { display: flex; gap: 8px; align-items: center; position: relative; }

button {
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
}
button:hover { border-color: var(--accent); color: var(--accent-dark); }
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.primary { background: var(--accent); color: white; border-color: var(--accent-dark); }
button.primary:hover { background: var(--accent-dark); color: white; }
button.danger { border-color: var(--danger); color: var(--danger); }
button.danger:hover { background: var(--danger-bg); }

.export-menu { position: relative; }
.dropdown {
  position: absolute; right: 0; top: 34px; z-index: 50;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; width: 260px; box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  display: flex; flex-direction: column; gap: 8px;
}
.dropdown-title { font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; }
.dropdown label { display: flex; flex-direction: column; font-size: 12px; gap: 3px; }
.dropdown select { padding: 5px; border-radius: 5px; border: 1px solid var(--border); }
.hidden { display: none !important; }

#tabs {
  display: flex; gap: 2px; background: var(--header-bg);
  padding: 0 18px; border-bottom: 1px solid var(--border);
}
.tab-btn {
  border: none; border-bottom: 3px solid transparent; border-radius: 0;
  background: transparent; padding: 10px 16px; font-size: 14px; color: var(--muted);
}
.tab-btn.active { color: var(--accent-dark); border-bottom-color: var(--accent); font-weight: 600; }

#status-bar {
  min-height: 26px; padding: 4px 18px; font-size: 12.5px; color: var(--muted);
}
#status-bar.error { color: var(--danger); }
#status-bar.ok { color: var(--ok); }

main { padding: 10px 18px 40px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.hint { color: var(--muted); font-size: 12.5px; margin: 4px 0 10px; }

.view-toolbar {
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 12px; margin-bottom: 6px;
}
.layout-toggle { display: flex; gap: 4px; }
.layout-btn.active { background: var(--accent); color: white; border-color: var(--accent-dark); }
.week-nav { display: flex; align-items: center; gap: 8px; }
.filter-box select { padding: 5px; border-radius: 5px; border: 1px solid var(--border); }
.swap-box { display: flex; align-items: center; gap: 8px; }
#employee-swap-status { font-size: 12.5px; color: var(--muted); }

.table-wrap {
  max-height: 72vh; overflow: auto; border: 1px solid var(--border);
  border-radius: 8px; background: var(--panel);
}
/* Same look, but grows to fit its content instead of scrolling internally
   (used by the Tallies tables, which should just run as long as they need to). */
.table-wrap-flow {
  overflow-x: auto; border: 1px solid var(--border);
  border-radius: 8px; background: var(--panel);
}
table { border-collapse: collapse; width: 100%; font-size: 12.5px; }
th, td {
  border: 1px solid var(--border); padding: 5px 8px; text-align: left; white-space: nowrap;
}
thead th {
  position: sticky; top: 0; background: var(--header-bg); z-index: 5; cursor: default;
}
tbody th {
  position: sticky; left: 0; background: var(--header-bg); z-index: 4;
}
td.cell { cursor: pointer; }
td.cell:hover { background: #eef4ff; }
td.cell.empty { color: var(--muted); font-style: italic; }
td.cell.weekend { background: #fafaf5; }
td.cell.selected { background: var(--selected) !important; outline: 2px solid var(--accent); outline-offset: -2px; }
td.cell.dragging { opacity: 0.4; }
td.cell.drop-target, th.emp-header.drop-target {
  background: #fef3c7 !important; outline: 2px dashed var(--warn); outline-offset: -2px;
}
th.emp-header { cursor: grab; }
th.emp-header:hover { background: var(--selected); }
tr.weekend-row th, tr.weekend-row td.rowhead { background: #fafaf5; }

td.cell.locked {
  background: repeating-linear-gradient(135deg, var(--header-bg), var(--header-bg) 6px, var(--panel) 6px, var(--panel) 12px);
  cursor: not-allowed;
}
td.cell.locked:hover { background: repeating-linear-gradient(135deg, var(--header-bg), var(--header-bg) 6px, var(--panel) 6px, var(--panel) 12px); }
.lock-icon { font-size: 10px; margin-right: 3px; opacity: 0.85; }

#tallies-wrap table { font-size: 12px; }
.flag-floor { background: var(--danger-bg); color: var(--danger); font-weight: 600; }
.flag-band { background: var(--warn-bg); color: var(--warn); }
.flag-ok { color: var(--ok); }
.audit-section { margin-top: 18px; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px; }
.audit-section h3 { margin-top: 0; }
.audit-empty { color: var(--ok); }
.tgt { color: var(--muted); font-size: 10.5px; white-space: nowrap; }
.live-dot { color: var(--ok); animation: live-pulse 2s ease-in-out infinite; }
@keyframes live-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.35; } }

.score-banner {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; margin-bottom: 10px; border-left: 4px solid var(--border);
}
.score-banner.feasible { border-left-color: var(--ok); }
.score-banner.infeasible { border-left-color: var(--danger); }
.score-headline { font-size: 15px; font-weight: 600; }
.score-sub { color: var(--muted); font-size: 12px; margin-top: 2px; }
.score-badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 700; margin-left: 8px; vertical-align: middle; }
.score-badge-ok { background: var(--ok-bg); color: var(--ok); }
.score-badge-bad { background: var(--danger-bg); color: var(--danger); }
.score-banner details { margin-top: 8px; font-size: 12px; }
.score-banner summary { cursor: pointer; color: var(--accent-dark); }
.score-banner ul { margin: 6px 0; padding-left: 18px; max-height: 220px; overflow: auto; }

.solver-panel {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; margin-bottom: 10px;
}
.solver-panel h3 { margin: 0 0 4px; font-size: 14px; }
.solver-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 8px; }
.solver-controls label { display: flex; align-items: center; gap: 5px; font-size: 12.5px; }
.solver-controls input[type="date"] { padding: 4px; border: 1px solid var(--border); border-radius: 5px; }
.solver-controls input[type="number"] { width: 55px; padding: 4px; border: 1px solid var(--border); border-radius: 5px; }
#solver-status { margin-top: 8px; }
.solver-progress-wrap {
  margin-top: 8px; height: 8px; border-radius: 4px; background: var(--header-bg); overflow: hidden;
}
.solver-progress-bar { height: 100%; width: 0%; background: var(--accent); transition: width 0.15s linear; }

/* Change-since-last-render indicators (Tallies tab): blue = moved toward its
   target (or, for the overall score, improved), red = moved away / worsened. */
#tallies-wrap td.diff-better { outline: 2px solid var(--accent); outline-offset: -2px; }
#tallies-wrap td.diff-worse { outline: 2px solid var(--danger); outline-offset: -2px; }
.score-banner.diff-better { outline: 3px solid var(--accent); outline-offset: 2px; }
.score-banner.diff-worse { outline: 3px solid var(--danger); outline-offset: 2px; }

.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 1000px) { .admin-grid { grid-template-columns: 1fr; } }
.admin-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 12px;
}
.admin-card h2 { font-size: 15px; margin-top: 0; }
.admin-add-row { display: flex; gap: 6px; margin-bottom: 10px; flex-wrap: wrap; }
.admin-add-row input { padding: 6px; border: 1px solid var(--border); border-radius: 5px; flex: 1; min-width: 90px; }
.admin-add-task input { flex: 1 1 30%; }

.pill { display: inline-block; padding: 1px 7px; border-radius: 10px; font-size: 11px; margin: 1px; background: var(--header-bg); }
.pill.off { opacity: 0.5; text-decoration: line-through; }

#modal-overlay {
  position: fixed; inset: 0; background: rgba(20,24,33,0.45);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
#modal-box {
  background: var(--panel); border-radius: 10px; padding: 20px; max-width: 480px; width: 90%;
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
#modal-box h3 { margin-top: 0; }
#modal-box .modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
#modal-box ul { max-height: 220px; overflow: auto; }

.eligible-matrix { display: flex; flex-wrap: wrap; gap: 6px; max-width: 420px; }
.eligible-matrix label { display: flex; align-items: center; gap: 4px; font-size: 12px; border: 1px solid var(--border); border-radius: 5px; padding: 3px 6px; }

.ctx-menu {
  position: fixed; z-index: 200; background: var(--panel); border: 1px solid var(--border);
  border-radius: 6px; box-shadow: 0 6px 20px rgba(0,0,0,0.18); padding: 4px;
  display: flex; flex-direction: column; min-width: 170px;
}
.ctx-menu button {
  text-align: left; border: none; background: none; padding: 7px 10px; border-radius: 4px; font-size: 13px; cursor: pointer;
}
.ctx-menu button:hover:not(:disabled) { background: var(--selected); }
.ctx-menu button:disabled { opacity: 0.4; cursor: not-allowed; }
.ctx-menu button.danger { color: var(--danger); }