:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --border: #d9dee5;
  --ink: #1d2733;
  --muted: #6b7785;
  --accent: #2f6df6;
  --accent-dark: #1e54c9;
  --danger: #d23b3b;
  --ok: #1f9d57;
}

* { box-sizing: border-box; }

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

h1 { font-size: 18px; margin: 0; }
h2 { font-size: 15px; margin: 0; }

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.topbar-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}

input[type="text"],
input[type="number"],
select {
  font-size: 14px;
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  min-width: 160px;
}
input:disabled, select:disabled, button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.combo { position: relative; display: block; }
.combo input { width: 100%; }
.combo-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 50;
  margin: 3px 0 0;
  padding: 4px;
  list-style: none;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 260px;
  overflow-y: auto;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.13);
  min-width: 220px;
}
.combo-list li {
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
}
.combo-list li.active { background: var(--accent); color: #fff; }
.combo-list li.empty { color: var(--muted); cursor: default; font-weight: 400; }

.region-readout {
  display: inline-flex;
  align-items: center;
  min-height: 33px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}
.region-readout.invalid { color: var(--danger); font-weight: 600; }

.layout {
  display: flex;
  gap: 20px;
  padding: 20px;
  align-items: flex-start;
}
.items-col { flex: 1 1 540px; display: flex; flex-direction: column; gap: 14px; }
.summary-col { flex: 0 0 420px; display: flex; flex-direction: column; gap: 14px; position: sticky; top: 20px; }

.line-item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.line-item-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
}
.line-item-body {
  padding: 0 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toggle-btn {
  border: 1px solid var(--accent);
  background: #fff;
  color: var(--accent);
  border-radius: 6px;
  padding: 5px 14px;
  font-weight: 600;
  cursor: pointer;
}
.toggle-btn.added { background: var(--accent); color: #fff; }

.secondary-btn {
  align-self: flex-start;
  border: 1px dashed var(--border);
  background: #fff;
  color: var(--accent);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
  font-weight: 600;
}

.slider-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 10px;
  align-items: center;
}
.slider-row label { grid-column: 1 / -1; flex-direction: row; gap: 8px; align-items: center; }
.slider-row input[type="range"] { width: 100%; }
input[type="range"] { accent-color: var(--accent); }
/* Discount pushed above the approved ceiling → pale red, not blue. */
input[type="range"].over-ceiling { accent-color: #e88a8a; }
.slider-val { color: var(--ink); font-weight: 700; }
.warn { font-size: 16px; }

.li-values, .li-calc, .validation-msg {
  font-size: 13px;
  color: var(--muted);
}
.li-values { display: flex; gap: 18px; flex-wrap: wrap; }
.li-values strong { color: var(--ink); }
.validation-msg { color: var(--danger); font-weight: 600; }

.course-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.course-row .remove {
  border: none; background: none; color: var(--danger);
  cursor: pointer; font-size: 18px; line-height: 1;
}

.totals-panel, .output-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.total-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 15px;
}
.total-row.net {
  border-top: 1px solid var(--border);
  margin-top: 6px;
  padding-top: 12px;
  font-size: 18px;
}
.total-row.net strong { color: var(--accent); }

.output-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  gap: 10px;
  flex-wrap: wrap;
}
.output-controls { display: flex; gap: 10px; align-items: center; }
.lang-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.lang-toggle button {
  border: none; background: #fff; padding: 5px 12px; cursor: pointer; font-weight: 600; color: var(--muted);
}
.lang-toggle button.active { background: var(--accent); color: #fff; }

.primary-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 7px 18px;
  font-weight: 700;
  cursor: pointer;
}
.primary-btn:hover { background: var(--accent-dark); }

.quote-preview {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  background: #fff;
  max-height: 60vh;
  overflow: auto;
}
.copy-status { display: inline-block; margin-top: 8px; font-size: 12px; color: var(--ok); font-weight: 600; min-height: 16px; }

@media (max-width: 900px) {
  .layout { flex-direction: column; }
  .summary-col { position: static; flex-basis: auto; width: 100%; }
}