:root {
  --ink: #1b2430;
  --ink-soft: #5c6b7a;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --line: #e3e0d8;
  --accent: #1f6f5c;
  --accent-soft: #e8f2ee;
  --warn: #a15c00;
  --warn-soft: #fbf0dd;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  border-bottom: 1px solid var(--line);
  padding: 2rem 0 1.5rem;
  background: var(--panel);
}

.brand { display: flex; align-items: baseline; gap: 0.6rem; }

.brand-mark {
  font-family: var(--mono);
  font-weight: 700;
  background: var(--accent);
  color: white;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.brand-name { font-size: 1.4rem; font-weight: 600; }

.tagline { color: var(--ink-soft); margin: 0.4rem 0 0; }

.app-main { padding-top: 1.75rem; padding-bottom: 3rem; }

.tabs {
  display: flex;
  gap: 0.4rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.75rem;
}

.tab {
  border: none;
  background: none;
  color: var(--ink-soft);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.tab:hover { color: var(--ink); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.tab-panel { display: none; }
.tab-panel.active { display: grid; }

.layout {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
}

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.panel h2 { margin-top: 0; font-size: 1.1rem; }

.field { margin-bottom: 1.25rem; }
.field:last-child { margin-bottom: 0; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 560px) {
  .field-row { grid-template-columns: 1fr; }
}

label, .field-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 0.4rem;
}

input[type="text"], input[type="number"], input[type="date"], select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--paper);
  color: var(--ink);
}

.sub-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 0.25rem;
}

.los-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 0.7fr;
  gap: 0.6rem;
}

@media (max-width: 560px) {
  .los-grid { grid-template-columns: 1fr; }
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.checkbox-field label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--ink);
}

.checkbox-field input { width: auto; margin: 0; }

.autocomplete-wrap { position: relative; }

.clear-btn {
  position: absolute;
  right: 0.5rem;
  top: 0.4rem;
  border: none;
  background: none;
  font-size: 1.1rem;
  color: var(--ink-soft);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
}

.autocomplete-list {
  position: absolute;
  z-index: 10;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  max-height: 280px;
  overflow-y: auto;
  box-shadow: 0 8px 24px rgba(20, 20, 20, 0.08);
}

.autocomplete-item {
  padding: 0.55rem 0.75rem;
  cursor: pointer;
  display: flex;
  gap: 0.6rem;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--line);
}

.autocomplete-item:last-child { border-bottom: none; }
.autocomplete-item:hover { background: var(--accent-soft); }

.ac-code { font-family: var(--mono); font-weight: 600; color: var(--accent); white-space: nowrap; }
.ac-desc { color: var(--ink-soft); }
.ac-sub { color: var(--ink-soft); font-size: 0.82rem; }

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.toggle-btn-group { display: flex; gap: 0.4rem; }

.toggle-btn {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  cursor: pointer;
}

.toggle-btn.active { background: var(--accent); border-color: var(--accent); color: white; }

.scenario-toggle {
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.scenario-toggle .toggle-btn {
  flex: 1 1 auto;
  text-align: center;
  padding: 0.55rem 0.8rem;
  font-size: 0.85rem;
}

.hint { font-size: 0.82rem; color: var(--ink-soft); margin: 0.5rem 0 0; }
.hint.err { color: #b3261e; }

.info-btn {
  border: none;
  background: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0 0.15rem;
  line-height: 1;
}
.info-btn:hover { color: var(--ink); }

.warn-badge { background: var(--warn-soft); color: var(--warn); }

.help-popover {
  position: absolute;
  z-index: 50;
  max-width: 300px;
  padding: 0.7rem 0.85rem;
  font-size: 0.82rem;
  line-height: 1.45;
  background: var(--panel);
  border: 1px solid var(--accent);
  box-shadow: 0 10px 30px rgba(20, 20, 20, 0.18);
}

.los-explainer { margin-top: 0.75rem; padding: 0.75rem 1rem; }
.los-explainer p { margin: 0 0 0.5rem; }
.los-explainer p:last-child { margin-bottom: 0; }

.locality-resolved {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.locality-resolved.ok { color: var(--accent); }

.receipt { font-size: 0.92rem; }

.receipt-empty {
  color: var(--ink-soft);
  padding: 2rem 0;
  text-align: center;
}

.receipt-head { margin-bottom: 0.75rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--line); }
.receipt-head .code { font-family: var(--mono); font-weight: 700; font-size: 1.05rem; }
.receipt-head .desc { color: var(--ink-soft); margin-top: 0.2rem; }

.receipt-meta { display: flex; flex-wrap: wrap; gap: 0.75rem; font-size: 0.82rem; color: var(--ink-soft); }

.badge {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--accent-soft);
  color: var(--accent);
}

.receipt-line, .receipt-subtotal, .receipt-total {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.4rem 0;
}

.receipt-line { border-bottom: 1px dashed var(--line); }
.receipt-line .label { color: var(--ink-soft); }
.receipt-line .value { font-family: var(--mono); white-space: nowrap; }

.receipt-subtotal {
  font-weight: 600;
  border-bottom: 1px solid var(--line);
  padding-top: 0.6rem;
}

.receipt-total {
  font-weight: 700;
  font-size: 1.05rem;
  border-top: 2px solid var(--ink);
  margin-top: 0.4rem;
  padding-top: 0.6rem;
}

.callout-details {
  border-radius: 8px;
  font-size: 0.85rem;
}
.callout-details.info { background: var(--accent-soft); color: #1b3c33; }
.callout-details.warn { background: var(--warn-soft); color: var(--warn); }

.receipt-group-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin: 1rem 0 0.25rem;
}
.receipt-group-label:first-child { margin-top: 0; }

.btn-secondary {
  display: inline-block;
  margin-top: 1rem;
  border: 1px solid var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  cursor: pointer;
}
.btn-secondary:hover { background: var(--accent); color: #fff; }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 3rem;
  color: var(--ink-soft);
  font-size: 0.8rem;
}