:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22d3ee;
  --border: #374151;
  --green: #22c55e;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans";
  background: linear-gradient(180deg, #0b1220, var(--bg));
  color: var(--text);
}

.header {
  padding: 24px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.header h1 { margin: 0 0 8px; font-size: 24px; }
.header p { margin: 0; color: var(--muted); }

.container {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 16px;
  padding: 16px;
  max-width: 1280px;
  margin: 0 auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.panel--form form { display: grid; gap: 16px; }

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
}
legend { padding: 0 6px; color: var(--accent); }

label { display: grid; grid-template-columns: 160px 1fr; align-items: center; gap: 12px; margin: 8px 0; }
label span { color: var(--muted); }
input, select, textarea {
  background: #0b1220;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
input:focus, select:focus, textarea:focus { outline: 1px solid var(--accent); }

.checkbox { grid-template-columns: 24px 1fr; }
.checkbox span { color: var(--text); }

.skills { display: grid; gap: 12px; }
.skill-group { border: 1px dashed var(--border); border-radius: 8px; padding: 8px; }
.skill-group h4 { margin: 4px 0 8px; color: var(--muted); font-weight: 600; }
.skill-items { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 6px; }
.skill-items label { grid-template-columns: 24px 1fr; }

.config-buttons { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
button {
  background: #0b1220;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }

.config-io { display: grid; grid-template-columns: 1fr; gap: 8px; }
#configJson { min-height: 120px; }

.panel--preview h2 { margin: 0 0 8px; }
#output { width: 100%; min-height: 200px; margin-bottom: 12px; }
.markdown { border-top: 1px solid var(--border); padding-top: 12px; }

.footer { text-align: center; padding: 16px; color: var(--muted); border-top: 1px solid var(--border); margin-top: 16px; }

@media (max-width: 960px) {
  .container { grid-template-columns: 1fr; }
}