/* grove product UI.
   Readable lists and an expandable tree — no graph editor, no drag-and-drop
   orchestrator. Colour is never the only signal: every state also carries
   a word, because "invalidated" in red and "invalidated" in green must not
   depend on the reader's monitor.
*/
:root {
  --ink: #16181d;
  --muted: #5b6470;
  --line: #d5dae1;
  --bg: #fbfcfd;
  --panel: #ffffff;
  --accent: #1f4f8f;
  --bad: #9b1c1c;
  --good: #1c6b3a;
  --warn: #8a5a00;
  --warn-bg: #fff6e5;
  --focus: #1f4f8f;
  --ok-bg: #ecf6ee;
  --bad-bg: #fbeeee;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 0 4rem;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  padding: 1.5rem 2rem 1rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

h1 { margin: 0; font-size: 1.6rem; letter-spacing: -0.01em; }
h2 { margin: 0 0 0.4rem; font-size: 1.2rem; }
h3 { margin: 1.4rem 0 0.5rem; font-size: 1rem; color: var(--muted); }

.sub { margin: 0.25rem 0 0.9rem; color: var(--muted); max-width: 62ch; }
.note { margin: 0.3rem 0 0.9rem; color: var(--muted); max-width: 78ch; font-size: 0.92rem; }
.hint { display: block; color: var(--muted); font-size: 0.85rem; max-width: 70ch; margin: 0.15rem 0 0.4rem; }

.skip-link {
  position: absolute; top: -100px; left: 0;
  padding: 0.4rem 0.7rem;
  background: var(--accent); color: #fff;
  text-decoration: none; border-radius: 0 0 4px 0;
}
.skip-link:focus { top: 0; }

main { padding: 0 2rem; max-width: 1100px; }

section {
  margin: 1.8rem 0;
  padding: 1.2rem 1.4rem 1.5rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.auth { display: flex; flex-direction: column; gap: 0.3rem; max-width: 60ch; }
.auth input { max-width: 24rem; }

label { font-weight: 600; font-size: 0.92rem; }

.row {
  display: grid;
  grid-template-columns: minmax(12rem, 18rem) 1fr;
  gap: 0.6rem;
  align-items: center;
  margin: 0.5rem 0;
}

input, select, textarea {
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 5px;
  font: inherit;
  background: #fff;
  color: inherit;
  min-width: 0;
}
textarea { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 0.92rem; }

/* A visible focus ring is the keyboard affordance; removing it would make
   this page unusable without a mouse. */
input:focus-visible, select:focus-visible, button:focus-visible, textarea:focus-visible, a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 1px;
}

button {
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--accent);
  border-radius: 5px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
button:hover:not(:disabled) { filter: brightness(1.08); }

button.danger { background: var(--bad); border-color: var(--bad); }

output {
  display: inline-block;
  margin-left: 0.8rem;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}
output.ok, .ok { color: var(--good); background: var(--ok-bg); }
output.error, .error { color: var(--bad); background: var(--bad-bg); }
output.warn, .warn { color: var(--warn); background: var(--warn-bg); }

#runtime-status { font-weight: 600; }
#runtime-status.error { color: var(--bad); }
#runtime-status.ok { color: var(--good); }
#runtime-error {
  background: var(--bad-bg);
  color: var(--bad);
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--bad);
  border-radius: 4px;
  white-space: pre-wrap;
  font-family: ui-monospace, Consolas, monospace;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.6rem 0 1rem;
  font-size: 0.93rem;
}

caption {
  text-align: left;
  color: var(--muted);
  font-size: 0.87rem;
  padding-bottom: 0.4rem;
}

th, td {
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

thead th { border-bottom: 2px solid var(--line); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); }

td button { padding: 0.25rem 0.6rem; font-size: 0.85rem; }

.plots { display: flex; flex-direction: column; gap: 1rem; margin: 1rem 0; }
.plots canvas, .plots .loss-curve {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  max-width: 100%;
  height: auto;
}
.loss-curve svg { display: block; max-width: 100%; height: auto; }

.pub-banner { padding: 0.5rem 0.8rem; border: 1px solid var(--line); border-radius: 4px; background: var(--warn-bg); margin-bottom: 0.5rem; }

/* Narrow screens: the table becomes a stack, and each cell keeps its
   column name so nothing becomes an unlabelled value. */
@media (max-width: 700px) {
  main { padding: 0 1rem; }
  header { padding: 1rem; }
  .row { grid-template-columns: 1fr; align-items: stretch; }
  thead { position: absolute; left: -9999px; }
  table, tbody, tr, td { display: block; width: 100%; }
  tr { border-bottom: 2px solid var(--line); padding: 0.4rem 0; }
  td { border: 0; display: flex; gap: 0.6rem; }
  td::before {
    content: attr(data-label);
    flex: 0 0 11rem;
    font-weight: 600;
    color: var(--muted);
  }
  td:empty { display: none; }
  .plots canvas { width: 100%; }
}

ul.tree, #modules, #conflicts { padding-left: 1.1rem; }
ul.tree li, #modules > li { margin: 0.35rem 0; }
li.checkpoint { color: var(--muted); }

/* Role hint colour: never use colour alone */
.role { font-weight: 600; }
.role.publisher { color: var(--good); }
.role.operator { color: var(--accent); }
.role.annotator { color: var(--warn); }
.role.reader { color: var(--muted); }