:root {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #0284c7;
  --border-color: #334155;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  padding: 2rem;
  display: flex;
  justify-content: center;
}

.container {
  max-width: 1000px;
  width: 100%;
}

header {
  margin-bottom: 2rem;
  text-align: center;
}

header h1 {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

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

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.full-width {
  grid-column: 1 / -1;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
}

.card h2 {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.input-group {
  margin-bottom: 1.25rem;
}

.input-group label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: var(--text-main);
}

.stepper {
  display: flex;
  align-items: center;
}

.stepper input {
  width: 100%;
  padding: 0.5rem;
  text-align: center;
  background-color: #0f172a;
  border: 1px solid var(--border-color);
  color: white;
  font-size: 1.1rem;
}

.btn-step {
  background-color: var(--border-color);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.btn-step:hover {
  background-color: var(--accent-hover);
}

.btn-step:first-child {
  border-radius: 6px 0 0 6px;
}

.btn-step:last-child {
  border-radius: 0 6px 6px 0;
}

small {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 0.25rem;
  display: block;
}

.status-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot.ready { background-color: #22c55e; }
.dot.working { background-color: #eab308; }

.metrics {
  display: grid;
  gap: 1rem;
}

.metric-box {
  background: #0f172a;
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.metric-box.highlight {
  border-color: var(--accent);
}

.metric-box .label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.metric-box .value {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--accent);
}

.bounds-box {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.bounds-box h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.bounds-box p {
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.table-wrapper {
  max-height: 300px;
  overflow-y: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th, td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: #0f172a;
  position: sticky;
  top: 0;
  color: var(--accent);
}

@media (max-width: 768px) {
  .grid {
    grid-template-columns: 1fr;
  }
}