html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #06080d;
  color: #e6edf7;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
}

#app {
  width: 100%;
  height: 100%;
}

#helpButton {
  position: static;
  display: block;
  width: calc(100% - 12px);
  margin: 8px 6px 6px;
  border: 1px solid rgba(143, 170, 204, 0.45);
  border-radius: 7px;
  padding: 7px 12px;
  background: rgba(10, 14, 22, 0.92);
  color: #e6edf7;
  font-size: 13px;
  cursor: pointer;
}

#helpButton:hover {
  background: rgba(20, 30, 46, 0.95);
}

#exportButton {
  position: static;
  display: block;
  width: calc(100% - 12px);
  margin: 6px 6px 8px;
  border: 1px solid rgba(143, 170, 204, 0.45);
  border-radius: 7px;
  padding: 7px 12px;
  background: rgba(10, 14, 22, 0.92);
  color: #e6edf7;
  font-size: 13px;
  cursor: pointer;
}

#exportButton:hover {
  background: rgba(20, 30, 46, 0.95);
}

#helpModal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(4, 8, 14, 0.7);
  backdrop-filter: blur(3px);
  padding: 20px;
}

#helpModal.open {
  display: flex;
}

.help-card {
  width: min(760px, 92vw);
  max-height: min(78vh, 900px);
  overflow-y: auto;
  background: #0d1320;
  border: 1px solid rgba(143, 170, 204, 0.42);
  border-radius: 10px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45);
  padding: 18px 18px 14px;
  color: #d8e5f7;
}

.help-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.help-head h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
}

.help-close {
  border: 1px solid rgba(143, 170, 204, 0.45);
  border-radius: 7px;
  background: rgba(12, 17, 26, 1.0);
  color: #e6edf7;
  cursor: pointer;
  padding: 5px 10px;
  font-size: 13px;
}

.help-close:hover {
  background: rgba(30, 41, 58, 1.0);
}

.help-body p {
  margin: 8px 0;
  line-height: 1.45;
  color: #cdd9ea;
  font-size: 14px;
}