:root {
  --flagged: #ffe0e0;
  --energy: #e6f3ff;
  --removed: #f0f0f0;
  --par: #ffe8b3;
  --niv-border: #003366;
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #222;
}

header {
  background: #0d47a1;
  color: white;
  padding: 1rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 0.75rem;
  color: white;
  font-size: 0.9rem;
  text-underline-offset: 0.2em;
}

header h1 {
  margin: 0;
}

.subtitle {
  margin: 0.25rem 0 0;
  opacity: 0.85;
}

.controls {
  padding: 1rem;
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-bottom: 1px solid #ddd;
}

.scenario-controls,
.price-inputs,
.step-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.step-buttons button {
  padding: 0.5rem 0.75rem;
  border: 1px solid #0d47a1;
  background: #0d47a1;
  color: white;
  cursor: pointer;
  border-radius: 4px;
}

.step-buttons button.secondary {
  background: #546e7a;
  border-color: #546e7a;
}

.step-buttons button:hover {
  opacity: 0.9;
}

main {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1rem;
  padding: 1rem;
}

.table-section {
  min-width: 0;
  overflow-x: auto;
}

.table-section table {
  width: 100%;
  min-width: 1080px;
  border-collapse: collapse;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

table th,
table td {
  border: 1px solid #ddd;
  padding: 0.4rem 0.5rem;
  text-align: left;
  font-size: 0.9rem;
}

table th {
  background: #f5f5f5;
}

.status {
  background: #fff;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #ddd;
}

.status ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem 0;
}

.status li {
  margin-bottom: 0.4rem;
}

.checklist li.done {
  color: green;
  font-weight: bold;
}

.solution-panel {
  background: #eef5ff;
  padding: 0.75rem;
  border: 1px solid #90caf9;
  border-radius: 4px;
}

.solution-panel.success {
  background: #e6ffe6;
  border-color: #66bb6a;
}

footer {
  padding: 0.75rem 1rem;
  background: #fff;
  border-top: 1px solid #ddd;
  font-size: 0.9rem;
  color: #555;
}

.log-panel {
  margin: 0 1rem 1.5rem;
  background: #fff;
  border: 1px solid #ddd;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 1rem;
}

.log-panel h2 {
  margin: 0 0 0.5rem 0;
}

.log-entries {
  border: 1px solid #eee;
  background: #fafafa;
  padding: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.9rem;
}

.log-entry {
  margin-bottom: 0.35rem;
}

.log-placeholder {
  margin: 0;
  color: #777;
}

tr.flagged-system {
  background: var(--flagged);
}

tr.energy {
  background: var(--energy);
}

tr.removed {
  background: var(--removed);
  text-decoration: line-through;
}

tr.in-par {
  background: var(--par);
}

tr.in-niv {
  border-left: 4px solid var(--niv-border);
}

tr.repriced td:nth-child(4) {
  font-style: italic;
}

@media (max-width: 960px) {
  main {
    grid-template-columns: 1fr;
  }
}