:root {
  --bg: #0D0F10;
  --card: #1A1D20;
  --accent: #FF4500;
  --text: #F0EDE8;
  --muted: #64748B;
  --error: #EF4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.topbar {
  padding: 20px 20px 8px;
}

.topbar h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
}

.subtitle {
  color: var(--muted);
  font-size: 13px;
  margin: 4px 0 0;
}

.layout {
  padding: 12px 20px 40px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 720px;
  margin: 0 auto;
}

.card {
  background: var(--card);
  border-radius: 10px;
  padding: 16px;
}

.card h2 {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 600;
}

.field-label {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin: 10px 0 4px;
}

input[type="text"],
input[type="number"],
input[type="file"],
textarea {
  width: 100%;
  background: var(--bg);
  border: none;
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
}

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.form-field {
  flex: 1;
  min-width: 100px;
}

.primary-btn {
  margin-top: 16px;
  width: 100%;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.error-text {
  color: var(--error);
  font-size: 13px;
  margin-top: 10px;
}

.stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.stat {
  background: var(--bg);
  border-radius: 8px;
  padding: 10px 12px;
  min-width: 110px;
}

.stat-value {
  font-size: 16px;
  font-weight: 700;
}

.stat-label {
  color: var(--muted);
  font-size: 11px;
  margin-top: 2px;
}

.chart {
  position: relative;
  height: 140px;
  background: var(--bg);
  border-radius: 8px;
  overflow: hidden;
}

.route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.route-list li {
  background: var(--bg);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.route-list li:hover {
  outline: 1px solid var(--accent);
}

.route-list .name {
  font-weight: 600;
}

.route-list .meta {
  color: var(--muted);
  font-size: 12px;
}

.empty-text {
  color: var(--muted);
  font-size: 13px;
}

.sim-section {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sim-section h3 {
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 600;
}

.sim-hint {
  color: var(--muted);
  font-size: 12px;
  line-height: 17px;
  margin: 0 0 12px;
}

select {
  width: 100%;
  background: var(--bg);
  border: none;
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

.sim-controls {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.primary-btn.small,
.secondary-btn.small {
  margin-top: 0;
  width: auto;
  flex: 1;
  padding: 10px;
  font-size: 14px;
}

.secondary-btn {
  background: var(--bg);
  color: var(--text);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
}

.secondary-btn:disabled,
.primary-btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.sim-readout {
  margin-top: 12px;
  color: var(--text);
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}