:root {
  --bg: #f7f7f8;
  --surface: #ffffff;
  --border: #dcdde1;
  --text: #1c1e21;
  --muted: #6b7280;
  --accent: #2454a6;
  --accent-hover: #1b3f80;
  --danger: #b3261e;
  --danger-bg: #fdecea;
  --radius: 6px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

h1 { font-size: 1.25rem; margin: 0; }

/* ---------- shell ---------- */

#app > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
#who { color: var(--muted); font-size: 0.85rem; }

main#content {
  max-width: 900px;
  margin: 24px auto 100px;
  padding: 0 20px;
}

/* ---------- buttons/inputs ---------- */

button {
  font: inherit;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
}
button:hover { background: #f0f1f3; }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button.primary:hover { background: var(--accent-hover); }
button.danger { color: var(--danger); }
button.danger:hover { background: var(--danger-bg); }
button:disabled { opacity: 0.6; cursor: default; }

input, select, textarea {
  font: inherit;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  width: 100%;
}
textarea { min-height: 70px; resize: vertical; }

a.primary {
  display: inline-block;
  margin-top: 12px;
  padding: 8px 16px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border-radius: var(--radius);
}

/* ---------- toolbar ---------- */

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.toolbar input[type="search"] { max-width: 320px; }
.toolbar .count { color: var(--muted); font-size: 0.85rem; }
.toolbar .primary { margin-left: auto; }

.muted { color: var(--muted); }
.error {
  color: var(--danger);
  background: var(--danger-bg);
  border: 1px solid #f3c6c3;
  padding: 8px 10px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  margin: 10px 0;
}

/* ---------- entry list (details/summary) ---------- */

.entry-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

details.entry {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
details.entry[open] { border-color: #b9c6dd; }
details.entry.entry-edited { border-left: 3px solid var(--accent); }
details.entry.entry-new { border-left: 3px solid #2f9e44; }
details.entry.entry-deleted { border-left: 3px solid var(--danger); opacity: 0.6; }
details.entry.entry-deleted .summary-main { text-decoration: line-through; }

details.entry > summary {
  list-style: none;
  cursor: pointer;
  padding: 10px 14px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.9rem;
}
details.entry > summary::-webkit-details-marker { display: none; }
details.entry > summary::before {
  content: "▸";
  color: var(--muted);
  font-size: 0.75rem;
  width: 10px;
}
details.entry[open] > summary::before { content: "▾"; }

.summary-main { font-weight: 600; }
.summary-meta { color: var(--muted); font-size: 0.8rem; font-family: var(--mono); }

.entry-body {
  padding: 4px 14px 14px 34px;
  border-top: 1px solid var(--border);
}

.field { margin: 12px 0; }
.field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 4px;
}

/* ---------- sticky footer ---------- */

#footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.06);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 10;
}
#footer .footer-error {
  color: var(--danger);
  font-size: 0.85rem;
  flex: 1;
}
#footer > span:first-child { font-weight: 600; }
#footer #save-btn, #footer #discard-btn { margin-left: auto; }
#footer #discard-btn { margin-left: auto; }
#footer #save-btn { margin-left: 8px; }

/* ---------- chip / tag / idref inputs ---------- */

.chip-input { border: 1px solid var(--border); border-radius: var(--radius); padding: 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.chips:empty { margin-bottom: 0; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: #eef1f6;
  border-radius: 999px;
  padding: 2px 4px 2px 10px;
  font-size: 0.8rem;
}
.chip button {
  border: none;
  background: transparent;
  padding: 0 6px;
  font-size: 1rem;
  line-height: 1;
  color: var(--muted);
}
.chip-input > input { border: none; padding: 4px; }
.idref-row { display: flex; gap: 6px; }
.idref-row select { flex: 1; }

/* ---------- tuple / object list editors ---------- */

.list-editor { border: 1px solid var(--border); border-radius: var(--radius); padding: 8px; }
.tuple-row, .object-row {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}
.tuple-row.removable input, .object-row.removable input { flex: 1; }
.tuple-row.removable button, .object-row.removable button {
  font-size: 0.75rem;
  padding: 4px 8px;
  white-space: nowrap;
}
.list-editor > button { margin-top: 4px; }