:root {
  --bg0: #071018;
  --bg1: #0d1b2a;
  --card: #122033;
  --line: #243447;
  --text: #e7eef7;
  --muted: #93a4b8;
  --accent: #3db8a0;
  --accent2: #5ec8ff;
  --warn: #f0b429;
  --ok: #3dd68c;
  --bad: #ff6b6b;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "IBM Plex Sans", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 500px at 10% -10%, #134e4a55, transparent),
    radial-gradient(800px 400px at 90% 0%, #1e3a5f66, transparent),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}
main { max-width: 920px; margin: 0 auto; padding: 2rem 1.1rem 3rem; }
.hero { margin-bottom: 1.25rem; }
.brand {
  margin: 0;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
h1 {
  margin: 0.2rem 0 0.5rem;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
}
.lead { color: var(--muted); margin: 0; line-height: 1.55; }
.lead a, a { color: var(--accent2); }
.panel {
  background: color-mix(in srgb, var(--card) 92%, black);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.1rem 1.15rem;
  margin-bottom: 1rem;
}
label { display: block; margin: 0.75rem 0 0.35rem; font-weight: 600; }
.hint { font-weight: 400; color: var(--muted); font-size: 0.85rem; }
.tiny { color: var(--muted); font-size: 0.82rem; margin: 0.4rem 0 0.2rem; }
.row { display: flex; gap: 0.5rem; }
input, textarea, select, button {
  font: inherit;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0a1624;
  color: var(--text);
  padding: 0.7rem 0.8rem;
}
input, textarea, select { width: 100%; }
textarea { resize: vertical; }
button {
  cursor: pointer;
  background: linear-gradient(135deg, #2a9d8f, #1f7a6e);
  border: none;
  font-weight: 700;
  padding: 0.75rem 1rem;
}
button:disabled { opacity: 0.45; cursor: not-allowed; }
button.secondary { background: #1a2b3d; border: 1px solid var(--line); }
.actions { display: flex; gap: 0.6rem; margin-top: 1rem; flex-wrap: wrap; }
.examples { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.8rem; }
.examples button {
  background: transparent;
  border: 1px dashed var(--line);
  color: var(--muted);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 0.45rem 0.7rem;
}
.graph { display: flex; flex-wrap: wrap; gap: 0.55rem; align-items: center; min-height: 3rem; }
.node {
  border: 2px solid var(--muted);
  border-radius: 12px;
  padding: 0.55rem 0.7rem;
  min-width: 130px;
  background: #0a1624;
  font-size: 0.86rem;
}
.node b { display: block; color: var(--accent2); }
.node.pending { border-color: #64748b; }
.node.running { border-color: var(--warn); }
.node.completed { border-color: var(--ok); }
.node.failed { border-color: var(--bad); }
.node .err { color: var(--bad); font-size: 0.72rem; display:inline-block; margin-top:0.2rem; max-width:160px; }
.arrow { color: var(--muted); }
.status { color: var(--accent2); font-weight: 600; }
.log {
  white-space: pre-wrap;
  word-break: break-word;
  background: #071018;
  border-radius: 10px;
  padding: 0.8rem;
  border: 1px solid var(--line);
  max-height: 280px;
  overflow: auto;
  font-size: 0.84rem;
  color: #c9d7e8;
}
h2 {
  margin: 0.2rem 0 0.55rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
footer { color: var(--muted); font-size: 0.9rem; margin-top: 0.5rem; }