/* Edit history: timeline, undo/redo, restore original (2026-09-23).
   Colours only from console.css tokens, so light, dark and a school's brand
   all follow without a second palette here. */

.hist-card-root { overflow: hidden; }
.hist-title { display: flex; align-items: center; gap: var(--space-2); }
.hist-title .hist-glyph { color: var(--brand-ink); flex: none; }
.hist-intro { margin: 0 0 var(--space-3); max-width: 62ch; }
.hist-locked { display: flex; gap: var(--space-2); align-items: flex-start; margin: 0; }
.hist-locked .hist-glyph { flex: none; margin-top: 2px; }

/* --- controls ---------------------------------------------------------- */
.hist-controls { margin-bottom: var(--space-4); }
.hist-buttons { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.hist-spacer { flex: 1 1 auto; }
.hist-undo, .hist-redo { min-width: 6.25rem; }
.hist-restore { color: var(--danger); }
.hist-restore:hover:not(:disabled) { color: var(--danger); background: var(--danger-soft); }
.hist-next { margin-top: var(--space-3); display: grid; gap: var(--space-1); }
.hist-hint { display: flex; gap: var(--space-2); align-items: baseline; min-width: 0;
  font-size: var(--fs-small); color: var(--text-dim); }
.hist-hint > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.hist-hint-k { flex: none; font-size: var(--fs-caption); font-weight: var(--fw-semibold);
  text-transform: uppercase; letter-spacing: var(--tracking-caps); color: var(--text-dim);
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-pill);
  padding: 0 .5rem; line-height: 1.5; }

/* --- timeline ---------------------------------------------------------- */
.hist-timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.hist-timeline::before { content: ""; position: absolute; left: 13px; top: 8px; bottom: 8px;
  width: 2px; background: var(--border); border-radius: 2px; }
.hist-item { position: relative; padding-left: 40px; }
.hist-item + .hist-item { margin-top: var(--space-3); }
.hist-node { position: absolute; left: 2px; top: 14px; width: 24px; height: 24px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-1); color: var(--brand-ink);
  border: 2px solid color-mix(in srgb, var(--brand-fill) 45%, var(--border)); }
.hist-item.hist-a-undo .hist-node, .hist-item.hist-a-redo .hist-node { color: var(--info); border-color: color-mix(in srgb, var(--info) 45%, var(--border)); }
.hist-item.hist-a-delete .hist-node { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); }
.hist-item.hist-a-restore .hist-node { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }

.hist-card { background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius);
  padding: var(--space-3); box-shadow: var(--shadow-sm); min-width: 0;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.hist-card:hover { border-color: var(--border-strong); }
.hist-top { display: flex; gap: var(--space-3); align-items: flex-start; min-width: 0; }
.hist-top .avatar { flex: none; }
.hist-main { flex: 1 1 auto; min-width: 0; }
.hist-summary { font-weight: var(--fw-medium); color: var(--text); line-height: var(--lh-tight);
  overflow-wrap: anywhere; padding-top: 2px; }
.hist-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .25rem .4rem; margin-top: .3rem;
  font-size: var(--fs-small); color: var(--text-dim); }
.hist-chips { display: inline-flex; flex-wrap: wrap; gap: .3rem; margin-left: .2rem; }
.hist-toggle { flex: none; }
.hist-toggle .icon { transition: transform var(--dur) var(--ease); }
.hist-toggle.open .icon { transform: rotate(180deg); }

.hist-item.is-undone .hist-card { background: var(--surface-2); box-shadow: none; border-style: dashed; }
.hist-item.is-undone .hist-summary { color: var(--text-dim); text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, var(--text-dim) 60%, transparent); }
.hist-item.is-undone .avatar { opacity: .55; filter: grayscale(.6); }
.hist-item.is-undone .hist-node { color: var(--text-dim); border-color: var(--border); }

/* --- what changed ------------------------------------------------------ */
.hist-details { margin-top: var(--space-3); padding-top: var(--space-3); border-top: 1px solid var(--border);
  display: grid; gap: var(--space-3); }
.hist-details[hidden] { display: none; }
.hist-detail-label { font-size: var(--fs-caption); font-weight: var(--fw-semibold); color: var(--text-dim);
  text-transform: uppercase; letter-spacing: var(--tracking-caps); margin-bottom: var(--space-1); }
.hist-change + .hist-change { margin-top: var(--space-2); }
.hist-field { font-size: var(--fs-small); color: var(--text-dim); margin-bottom: 2px; }
.hist-diff { display: flex; flex-wrap: wrap; align-items: baseline; gap: .3rem .5rem; font-size: var(--fs-small);
  line-height: var(--lh); min-width: 0; }
.hist-before, .hist-after { border-radius: var(--radius-sm); padding: .1rem .4rem; overflow-wrap: anywhere;
  min-width: 0; max-width: 100%; }
.hist-before { color: var(--text-dim); background: var(--danger-soft); text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, var(--danger) 55%, transparent); }
.hist-after { color: var(--text); background: var(--ok-soft); text-decoration: none; font-weight: var(--fw-medium); }
.hist-arrow { color: var(--text-dim); }

.hist-origin { display: flex; align-items: center; gap: var(--space-2); margin: var(--space-4) 0 0; }

/* --- restore confirmation ---------------------------------------------- */
.hist-confirm-list { margin: 0; padding-left: 1.2rem; display: grid; gap: .3rem; }
.hist-confirm-list li { overflow-wrap: anywhere; }
.hist-confirm-narr { display: flex; gap: var(--space-2); align-items: flex-start; padding: var(--space-3);
  background: var(--info-soft); color: var(--text); border-radius: var(--radius); margin: 0; }
.hist-confirm-narr .icon { color: var(--info); flex: none; margin-top: 2px; }

/* --- "Saved · Undo" toast ---------------------------------------------- */
.toast.hist-toast { align-items: center; }
.hist-toast .toast-text { flex: 1 1 auto; min-width: 0; }
.hist-toast-undo { flex: none; margin-left: var(--space-2); font-weight: var(--fw-semibold);
  color: var(--brand-ink); border-color: color-mix(in srgb, var(--brand-fill) 35%, var(--border)); }

@media (max-width: 560px) {
  .hist-spacer { display: none; }
  .hist-undo, .hist-redo { flex: 1 1 0; min-width: 0; }
  .hist-restore { flex: 1 1 100%; justify-content: center; }
  .hist-item { padding-left: 34px; }
  .hist-timeline::before { left: 11px; }
  .hist-node { left: 0; width: 22px; height: 22px; }
  .hist-top { gap: var(--space-2); flex-wrap: wrap; }
  .hist-main { flex-basis: calc(100% - 40px); }
  .hist-toggle { margin-left: 36px; }
}

@media (prefers-reduced-motion: reduce) {
  .hist-card, .hist-toggle .icon { transition: none; }
}