:root {
  --bg: #11151c;
  --panel: #1a2029;
  --panel-border: #2a3440;
  --text: #e6eaf0;
  --muted: #9aa7b5;
  --accent: #4da3ff;
  --ok: #4caf7d;
  --err: #e05555;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  font-size: 14px;
}

.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
  padding: 12px 20px;
}

.topbar__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.topbar h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.topbar__tagline {
  margin: 0;
  color: var(--muted);
  flex: 1 1 200px;
}

.topbar__actions {
  display: flex;
  gap: 8px;
}

.btn {
  appearance: none;
  border: 1px solid var(--panel-border);
  background: #222b36;
  color: var(--text);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

.btn:hover:not(:disabled) {
  border-color: var(--accent);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0b1220;
  font-weight: 600;
}

.btn--ghost {
  background: transparent;
}

.workspace {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: 16px 20px;
}

.pane {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  min-height: 60vh;
  overflow: hidden;
}

.pane__title {
  margin: 0;
  padding: 10px 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  border-bottom: 1px solid var(--panel-border);
}

.yaml-input {
  flex: 1;
  min-height: 400px;
  border: 0;
  background: transparent;
  color: #d7dee8;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 12px;
  line-height: 1.5;
  padding: 12px 14px;
  resize: none;
  outline: none;
  white-space: pre;
}

.preview {
  flex: 1;
  width: 100%;
  min-height: 400px;
  border: 0;
  background: #525659;
}

.status {
  max-width: 1200px;
  margin: 0 auto 12px;
  width: 100%;
  padding: 0 20px;
  font-size: 13px;
}

.status--ok {
  color: var(--ok);
}

.status--error {
  color: var(--err);
}

.status--info {
  color: var(--muted);
}

.footer {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 4px 20px 20px;
  color: var(--muted);
  font-size: 12px;
}

.footer code {
  color: var(--text);
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}