/* TAF Agent — minimal clean styling */
:root {
  --bg: #0a0e14;
  --bg-card: #12181f;
  --bg-input: #1a2028;
  --fg: #c9d1d9;
  --fg-dim: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --success: #3fb950;
  --warning: #d29922;
  --danger: #f85149;
  --border: #30363d;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
               Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  text-align: center;
  padding: 2rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0 0 0.5rem 0; font-size: 2rem; }
.tagline { font-size: 1.1rem; margin: 0 0 0.5rem; }
.subtle { color: var(--fg-dim); font-size: 0.9rem; }

main {
  max-width: 980px;
  margin: 0 auto;
  padding: 1.5rem;
}

section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

h2 { margin-top: 0; font-size: 1.2rem; color: var(--accent); }

#status-bar { padding: 0.75rem 1.25rem; }
#status { font-family: monospace; }

.recipe-desc { color: var(--fg-dim); margin: 0.5rem 0 0 0; }

.form-row { display: flex; gap: 1rem; margin-bottom: 1rem; align-items: center; }
.form-row label { min-width: 120px; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.form-field { display: flex; flex-direction: column; }
.form-field label { font-size: 0.85rem; color: var(--fg-dim); margin-bottom: 0.25rem; }

input, select {
  background: var(--bg-input);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.4rem 0.6rem;
  font-family: monospace;
  font-size: 0.95rem;
}
input:focus, select:focus { outline: 1px solid var(--accent); border-color: var(--accent); }

button {
  background: var(--accent-dim);
  color: white;
  border: none;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}
button:hover:not(:disabled) { background: var(--accent); }
button:disabled { background: #444; cursor: not-allowed; }

#verdict-box {
  font-size: 1.05rem;
  padding: 1rem;
  border-radius: 6px;
  border-left: 4px solid;
}
.verdict-yes { border-color: var(--success); background: rgba(63, 185, 80, 0.08); }
.verdict-no { border-color: var(--danger); background: rgba(248, 81, 73, 0.08); }
.verdict-degraded { border-color: var(--warning); background: rgba(210, 153, 34, 0.08); }

.chain-step {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  margin-bottom: 0.5rem;
}
.chain-step summary {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.chain-step summary::before { content: "▸ "; color: var(--accent); }
.chain-step[open] summary::before { content: "▾ "; }
.step-section { color: var(--accent); font-family: monospace; font-size: 0.9rem; }
.step-formula { color: var(--fg-dim); font-family: monospace; font-size: 0.85rem; margin: 0.5rem 0; }
.step-result { color: var(--success); font-family: monospace; font-weight: 600; margin-top: 0.25rem; }
.step-interp { color: var(--fg-dim); font-size: 0.9rem; margin-top: 0.25rem; }
.step-result pre { background: var(--bg); padding: 0.5rem; border-radius: 4px; overflow-x: auto; }

.recipe-tag {
  background: var(--bg-input);
  color: var(--accent);
  font-family: monospace;
  font-size: 0.85rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.mode-tabs { display: flex; gap: 0.5rem; margin-bottom: 0.75rem; flex-wrap: wrap; }
.mode-btn {
  background: var(--bg-input); color: var(--fg-dim);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 0.5rem 1rem; cursor: pointer; font-size: 0.95rem;
}
.mode-btn.active { background: var(--accent-dim); color: white; border-color: var(--accent); }
button.secondary {
  background: var(--bg-input); color: var(--fg);
  border: 1px solid var(--border); padding: 0.4rem 0.8rem;
}
button.secondary:hover:not(:disabled) { border-color: var(--accent); }

textarea {
  width: 100%; min-height: 60px;
  background: var(--bg-input); color: var(--fg);
  border: 1px solid var(--border); border-radius: 4px;
  padding: 0.5rem; font-family: inherit; font-size: 0.95rem; resize: vertical;
}
textarea:focus { outline: 1px solid var(--accent); border-color: var(--accent); }

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
  main { padding: 0.75rem; }
  .form-row { flex-direction: column; align-items: stretch; }
  .form-row label { min-width: auto; }
}

footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--fg-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 2rem;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }