:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #020617;
  --border: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --text-on-accent: #f8fafc;
  --danger: #ef4444;
  --success: #10b981;
  --warning: #fbbf24;

  --shadow: 0 10px 25px rgba(0, 0, 0, 0.35);
  --table-border: #111827;
  --table-header-bg: #111827;
  --kpi-bg: rgba(2, 6, 23, 0.55);
}

:root[data-theme="light"] {
  /* Light theme: keeps the same layout, just lighter surfaces */
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;
  --border: #cbd5e1;
  --text: #0f172a;
  --text-muted: #475569;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --text-on-accent: #ffffff;
  --danger: #dc2626;
  --success: #059669;
  --warning: #d97706;

  --shadow: 0 10px 25px rgba(15, 23, 42, 0.10);
  --table-border: #e2e8f0;
  --table-header-bg: #e2e8f0;
  --kpi-bg: rgba(15, 23, 42, 0.04);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.app-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
}

@media (max-width: 900px) {
  .app-container { padding: 1rem; }
}

/* ------------------------------------------------------------
   Header + nav
------------------------------------------------------------ */

.app-header {
  margin-bottom: 1.25rem;
}

.app-header .title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
}

h1 { margin: 0; font-size: 1.6rem; }

.subtitle {
  margin: 0.35rem 0 0 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.nav-link {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.9rem;
  background-color: var(--bg-input);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.nav-link:hover {
  background-color: var(--accent-hover);
  color: var(--text-on-accent);
  border-color: var(--accent-hover);
}

.nav-link.active {
  background-color: var(--accent);
  color: var(--text-on-accent);
  border-color: var(--accent);
}

/* Theme toggle pill (kept in the nav row) */
button.theme-toggle {
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.9rem;
  background-color: var(--bg-input);
  color: var(--text-muted);
  border: 1px solid var(--border);
  cursor: pointer;
  font-weight: 500;
}

button.theme-toggle:hover {
  background-color: var(--accent-hover);
  color: var(--text-on-accent);
  border-color: var(--accent-hover);
}

/* ------------------------------------------------------------
   Sections / cards
------------------------------------------------------------ */

.section, .card {
  border: 1px solid var(--border);
  background-color: var(--bg-card);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  border-radius: 0.75rem;
  box-shadow: var(--shadow);
}

.section h2, .card h2 {
  margin: 0 0 0.85rem 0;
  font-size: 1.15rem;
}

.section h3, .card h3 {
  margin: 0 0 0.75rem 0;
  font-size: 1.05rem;
  color: var(--accent);
}

.hint {
  margin: 0.25rem 0 0.75rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ------------------------------------------------------------
   Forms
------------------------------------------------------------ */

.field { margin-bottom: 1rem; }

label {
  font-weight: 600;
  display: inline-block;
  margin-bottom: 0.35rem;
}

input[type="text"],
textarea,
select {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background-color: var(--bg-input);
  color: var(--text);
  font: inherit;
}

textarea { resize: vertical; }

input[type="file"] { color: var(--text-muted); }

button {
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  border: none;
  background-color: var(--accent);
  color: var(--text-on-accent);
  font-weight: 600;
  cursor: pointer;
}

button:hover { background-color: var(--accent-hover); }

button[disabled] {
  opacity: 0.6;
  cursor: default;
}

.btn-small {
  padding: 0.35rem 0.85rem;
  font-size: 0.85rem;
  border-radius: 10px;
}

.btn-small.danger {
  background-color: var(--danger);
}

.btn-small.danger:hover { background-color: #dc2626; }

/* ------------------------------------------------------------
   Flash messages
------------------------------------------------------------ */

.flash-messages {
  margin-bottom: 1rem;
}

.flash {
  padding: 0.6rem 0.75rem;
  border-radius: 0.6rem;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--border);
  background-color: rgba(148, 163, 184, 0.10);
}

.flash.success {
  background-color: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.6);
}

.flash.error {
  background-color: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.6);
}

.flash.warning {
  background-color: rgba(251, 191, 36, 0.12);
  border-color: rgba(251, 191, 36, 0.6);
}

.flash.message {
  background-color: rgba(59, 130, 246, 0.10);
  border-color: rgba(59, 130, 246, 0.35);
}

/* ------------------------------------------------------------
   Dropzones
------------------------------------------------------------ */

.dropzone {
  border: 1px dashed var(--border);
  border-radius: 0.75rem;
  padding: 0.85rem 1rem;
  text-align: center;
  background-color: var(--bg-input);
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
  font-size: 0.9rem;
}

.dropzone strong { color: var(--text); }

.dropzone.dragover {
  border-color: var(--accent);
  background-color: rgba(37, 99, 235, 0.15);
  color: var(--text);
}

.dropzone span.filename {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  word-break: break-all;
}

.hidden-input { display: none; }

/* ------------------------------------------------------------
   Tables
------------------------------------------------------------ */

.table-responsive {
  overflow-x: auto;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  background-color: var(--bg-input);
  border-radius: 0.5rem;
  overflow: hidden;
}

table.data-table th,
table.data-table td {
  border: 1px solid var(--table-border);
  padding: 0.35rem 0.45rem;
  white-space: nowrap;
}

table.data-table thead th {
  background-color: var(--table-header-bg);
  position: sticky;
  top: 0;
  z-index: 1;
}

table.data-table th {
  text-align: center;
}

/* ------------------------------------------------------------
   Config Editor specific
------------------------------------------------------------ */

.mapping-group {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.map-field {
  margin-bottom: 0.75rem;
  break-inside: avoid;
}

.map-field label {
  font-size: 0.9rem;
  font-weight: 500;
}

.map-field select {
  width: 100%;
  min-width: unset;
  margin-top: 0.25rem;
  font-size: 0.9rem;
}

.map-field-container {
  column-width: 300px;
  column-gap: 1.25rem;
}

.datetime-toggle {
  margin-bottom: 1.5rem;
  padding: 0.75rem;
  background-color: var(--bg-input);
  border-radius: 0.5rem;
  border: 1px solid var(--border);
}

.datetime-toggle h4 { margin: 0 0 0.5rem 0; font-size: 1rem; }

.datetime-toggle label { font-weight: 500; margin-right: 1rem; }

.datetime-toggle input[type="radio"] { margin-right: 0.25rem; accent-color: var(--accent); }

.reconcile-container {
  display: flex;
  gap: 2rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.source-panel {
  flex: 1;
  min-width: 250px;
  background: var(--bg-input);
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
}

.target-panel {
  flex: 2;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.bin {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  min-height: 150px;
}

.bin h4 {
  margin: 0 0 0.5rem 0;
  font-size: 0.9rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  pointer-events: none;
}

.draggable-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.35rem 0.75rem;
  margin-bottom: 0.5rem;
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: grab;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2);
  color: var(--text);
}

.draggable-item:active { cursor: grabbing; }

.bin-drop-area {
  flex-grow: 1;
  border: 1px dashed var(--border);
  border-radius: 4px;
  padding: 0.25rem;
  transition: background-color 0.2s;
}

.bin-drop-area.drag-over {
  background-color: rgba(37, 99, 235, 0.15);
  border-color: var(--accent);
}

/* Reduction mapping */
.reduction-select-list { display: flex; flex-direction: column; gap: 0.5rem; }
.reduction-row { display: flex; align-items: flex-start; gap: 0.5rem; flex-wrap: wrap; }
.reduction-row select { flex: 1; }
.reduction-row select.umbrella-select { min-height: 110px; height: auto; appearance: auto; }


/* Mileage range mapping */
.mileage-range-list { display: flex; flex-direction: column; gap: 0.5rem; }
.mileage-row { display: flex; align-items: flex-end; gap: 0.5rem; flex-wrap: wrap; }
.mileage-row select.mileage-desc-select { flex: 3; min-width: 280px; }
.mileage-row input.mileage-start,
.mileage-row input.mileage-end { flex: 1; min-width: 140px; }


/* Diameter range mapping (Work Items) */
.diameter-range-list { display: flex; flex-direction: column; gap: 0.5rem; }
.diameter-row { display: flex; align-items: flex-end; gap: 0.5rem; flex-wrap: wrap; }
.diameter-row select.diameter-desc-select { flex: 3; min-width: 280px; }
.diameter-row input.diameter-start,
.diameter-row input.diameter-end { flex: 1; min-width: 140px; }




/* Not to Exceed (NTE) mapping */
.nte-flag-list { display: flex; flex-direction: column; gap: 0.5rem; }
.nte-row { display: flex; align-items: flex-end; gap: 0.5rem; flex-wrap: wrap; }
.nte-row select.nte-debris-select,
.nte-row select.nte-desc-select,
.nte-row select.nte-site-select { flex: 3; min-width: 240px; }
.nte-row select.nte-uom-select { flex: 0; min-width: 90px; }
.nte-row input.nte-qty,
.nte-row input.nte-cost { flex: 1; min-width: 140px; }


/* Zero Quantity (0 Qty) flags */
.zeroqty-flag-list { display: flex; flex-direction: column; gap: 0.5rem; }
.zeroqty-row { display: flex; align-items: flex-end; gap: 0.5rem; flex-wrap: wrap; }
.zeroqty-row select.zeroqty-site-select,
.zeroqty-row select.zeroqty-umb-select,
.zeroqty-row select.zeroqty-field-select { flex: 3; min-width: 240px; }
.zeroqty-row select.zeroqty-field-select { min-width: 280px; }


/* Service Item / Diameter flags (Work Items) */
.sid-flag-list { display: flex; flex-direction: column; gap: 0.5rem; }
.sid-row { display: flex; align-items: flex-end; gap: 0.5rem; flex-wrap: wrap; }
.sid-row select.sid-service-select { flex: 3; min-width: 240px; }
.sid-row select.sid-operator-select { flex: 0; min-width: 170px; }
.sid-row input.sid-diameter { flex: 1; min-width: 140px; }


/* ------------------------------------------------------------
   Reports specific
------------------------------------------------------------ */

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.75rem;
}

.kpi {
  border: 1px solid var(--border);
  background-color: var(--kpi-bg);
  border-radius: 0.75rem;
  padding: 0.85rem 0.9rem;
}

.kpi .k { color: var(--text-muted); font-size: 0.85rem; }
.kpi .v { font-size: 1.15rem; font-weight: 700; margin-top: 0.15rem; }

/* ------------------------------------------------------------
   Run Validation specific
------------------------------------------------------------ */

.preview-card {
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  max-height: 360px;
  overflow: auto;
  background-color: var(--bg-input);
  padding: 0.75rem;
}

/* ------------------------------------------------------------
   GPS specific
------------------------------------------------------------ */

.map-container { height: 700px; max-height: 80vh; }
#map { width: 100%; height: 650px; border-radius: 6px; border: 1px solid var(--border); }

/* ------------------------------------------------------------
   Authentication UI
------------------------------------------------------------ */
.auth-card {
  max-width: 520px;
  margin: 2rem auto;
}

.auth-card input[type="text"],
.auth-card input[type="password"] {
  width: 100%;
}

.auth-actions {
  margin-top: 1rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.nav-user {
  align-self: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0.35rem 0.25rem;
}

.logout-link {
  border-color: color-mix(in srgb, var(--danger) 70%, var(--border));
}

.logout-link:hover {
  background-color: var(--danger);
  color: var(--text-on-accent);
  border-color: var(--danger);
}