* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  font-family: ui-sans-serif, system-ui, sans-serif;
  background: #1a1b26;
  color: #c0caf5;
}
.layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-rows: auto 1fr;
  gap: 0.75rem;
  padding: 0.75rem;
  height: 100vh;
  max-width: 1600px;
  margin: 0 auto;
}
h1 {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  color: #7aa2f7;
}
.swap-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
}
.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #3b4261;
  background: #24283b;
}
.panel label {
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #565f89;
  border-bottom: 1px solid #3b4261;
}
.panel textarea {
  flex: 1;
  min-height: 10rem;
  padding: 0.75rem;
  font-family: ui-monospace, monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  resize: none;
  border: none;
  background: #1a1b26;
  color: #c0caf5;
}
.panel textarea::placeholder {
  color: #565f89;
}
.panel textarea:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px #7aa2f7;
}
.panel textarea.readonly {
  cursor: default;
  color: #a9b1d6;
}
.btn-swap {
  white-space: nowrap;
}
.toolbar {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.toolbar .spacer {
  flex: 1;
}
.build-sha {
  font-size: 0.75rem;
  color: #565f89;
  align-self: center;
}
.btn {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background: #7aa2f7;
  color: #1a1b26;
}
.btn:hover {
  background: #89b4fa;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}