:root {
  --bg-color: #0f0f12;
  --card-bg: #1a1a1f;
  --card-border: #2a2a35;
  --text-primary: #f0f0f0;
  --text-secondary: #a0a0b0;
  --accent-color: #3b82f6; /* Modern blue */
  --accent-hover: #2563eb;
  --success-color: #10b981;
  --gold-color: #ffd700;
  --danger-color: #ef4444;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.15);
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  padding: 40px 20px;
  background: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

h1, h2, h3, h4 {
  margin-top: 0;
  color: #fff;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

small {
  color: var(--text-secondary);
  display: block;
  margin-bottom: 2rem;
}

/* Layout Containers */
.container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Strategy Room */
#strategy-room {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}

.strategy-header {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 1.5rem;
}

.strategy-header h2 {
  margin-bottom: 0.25rem;
  font-size: 1.25rem;
}

.strategy-header small {
  margin-bottom: 0;
}

.strategy-controls {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.driver-select-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 0.6rem 1.2rem;
  border-radius: 99px; /* Pill shape */
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.driver-select-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.driver-select-btn.active {
  background: var(--gold-color);
  color: #000;
  border-color: var(--gold-color);
  font-weight: 600;
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.2);
}

.strategy-results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.scenario-card {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--card-border);
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  transition: transform 0.2s;
}

.scenario-card:hover {
  border-color: #444;
  transform: translateY(-2px);
}

.scenario-card h4 {
  color: var(--gold-color);
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

.scenario-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Manual Simulation Controls */
.controls {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.controls-text {
  flex: 1;
  min-width: 200px;
}

.controls-text strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.actions {
  display: flex;
  gap: 1rem;
}

button {
  cursor: pointer;
  border-radius: var(--radius-sm);
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s;
  background: #333;
  color: #fff;
}

button:hover {
  background: #444;
}

button.primary {
  background: var(--accent-color);
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

button.primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* Table Styling */
table {
  width: 100%;
  border-collapse: separate; /* Allows border-radius on rows/cells */
  border-spacing: 0;
  margin-top: 1rem;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
}

th {
  background: rgba(255, 255, 255, 0.03);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

td {
  font-size: 0.95rem;
}

tr:last-child td {
  border-bottom: none;
}

tbody tr {
  transition: background 0.15s;
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

/* Champion Highlight */
.champion-row {
  background: rgba(255, 215, 0, 0.05) !important;
  position: relative;
}

.champion-row td:first-child {
  box-shadow: inset 4px 0 0 var(--gold-color);
}

select {
  appearance: none;
  background: #000;
  border: 1px solid var(--card-border);
  color: #fff;
  padding: 0.5rem 2rem 0.5rem 1rem;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
}

select:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* Summary Badge */
.champion-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 99px;
  background: var(--gold-color);
  color: #000;
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-right: 0.5rem;
}

.tie-badge {
  background: #555;
  color: #fff;
}

#champion-summary {
  background: linear-gradient(to right, rgba(59, 130, 246, 0.1), transparent);
  border-left: 4px solid var(--accent-color);
  padding: 1rem 1.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

#champion-summary p {
  margin: 0;
}

/* Note Section */
.note {
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.note strong {
  color: #fff;
  display: block;
  margin-bottom: 0.5rem;
}

.note ul {
  padding-left: 1.5rem;
  margin: 0;
}

.note li {
  margin-bottom: 0.25rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  body {
    padding: 20px 10px;
  }
  
  .controls {
    flex-direction: column;
    align-items: stretch;
  }
  
  .actions {
    flex-direction: column;
  }
  
  table {
    display: block;
    overflow-x: auto;
  }
}