/* Document sheet: the page plus a margin column for comments and suggestions. */
#doc-pane { container-type: inline-size; }
.sheet {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 18px;
  max-width: 1010px;
  margin: 0 auto;
  padding: 36px 24px 160px;
}
.page {
  flex: 1 1 660px;
  min-width: 0;
  max-width: 700px;
  background: var(--paper);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 56px 64px 96px;
}
.margin {
  position: relative;
  flex: 0 0 250px;
  align-self: stretch;
  min-height: 200px;
}
@container (max-width: 860px) {
  .sheet { gap: 12px; padding: 20px 12px 120px; }
  .page { padding: 40px 40px 72px; }
  .margin { flex-basis: 220px; }
}
@container (max-width: 600px) {
  .sheet { flex-direction: column; align-items: stretch; }
  .page { padding: 28px 20px 48px; }
  .margin { flex-basis: auto; min-height: 0; display: flex; flex-direction: column; gap: 8px; }
  .margin .bubble { position: relative; transform: none !important; }
}

.doc-title {
  display: block;
  width: 100%;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 600 30px/1.2 var(--serif);
  letter-spacing: -.01em;
  padding: 0;
  margin: 0 0 22px;
}
.doc-title:focus { outline: none; }
.doc-title::placeholder { color: var(--muted); }

.doc-text {
  font: 18px/1.72 var(--serif);
  color: var(--ink);
  caret-color: var(--accent);
  outline: none;
  min-height: 50vh;
  overflow-wrap: break-word;
}
.doc-text p { margin: 0 0 .9em; white-space: pre-wrap; position: relative; }
.doc-text.read-only { caret-color: transparent; }
.doc-text.read-only .ins { cursor: default; }
.doc-text p:last-child { margin-bottom: 0; }
.doc-text:empty::before { content: "Paste or type your essay…"; color: var(--muted); }

/* A violet tick in the gutter marks paragraphs that have been excerpted. */
.doc-text p.has-excerpt::before {
  content: "";
  position: absolute;
  left: -26px;
  top: .45em;
  bottom: .45em;
  width: 3px;
  border-radius: 3px;
  background: var(--excerpt);
  opacity: .45;
}

/* Annotations */
.doc-text span { border-radius: 2px; -webkit-box-decoration-break: clone; box-decoration-break: clone; transition: background-color .15s, box-shadow .15s; }
.doc-text .hl-yellow { background: var(--hl-yellow); }
.doc-text .hl-green { background: var(--hl-green); }
.doc-text .hl-blue { background: var(--hl-blue); }
.doc-text .hl-pink { background: var(--hl-pink); }
.doc-text .commented { box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--accent) 55%, transparent); }
.doc-text .commented:not(.hl) { background: var(--accent-soft); }
.doc-text .del {
  color: var(--del);
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
}
.doc-text .ins {
  color: var(--ins);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  background: color-mix(in srgb, var(--ins) 9%, transparent);
  user-select: none;
  cursor: pointer;
}
.doc-text .hot { background: var(--hot); }
.doc-text .excerpted.hot { background: var(--excerpt-soft); box-shadow: inset 0 -2px 0 var(--excerpt); }
/* Rubric evidence: invisible until the report is open, then a quiet dotted
   underline; lit when its chip or criterion is hovered. */
.doc-text.show-evidence .evidence:not(.del) {
  text-decoration: underline dotted color-mix(in srgb, var(--evidence) 65%, transparent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 4px;
}
.doc-text .evidence.hot-ev {
  background: color-mix(in srgb, var(--evidence) 20%, transparent);
  box-shadow: inset 0 -2px 0 var(--evidence);
}
.doc-text .pulse { animation: text-pulse 1.1s ease-out; }
@keyframes text-pulse {
  0%, 35% { background: color-mix(in srgb, var(--accent) 30%, transparent); }
}

/* Collapsed ("pinched") view */
.fold {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 .9em;
  color: var(--muted);
  font: 12px var(--sans);
  cursor: pointer;
  user-select: none;
}
.fold::before, .fold::after { content: ""; flex: 1; border-top: 1px dashed var(--line-strong); }
.fold span { padding: 2px 10px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface-2); }
.fold:hover span { color: var(--ink); border-color: var(--line-strong); }
.doc-text.is-collapsed p { animation: settle .25s ease-out; }
@keyframes settle { from { opacity: .4; transform: translateY(4px); } }

/* Margin bubbles */
.bubble {
  position: absolute;
  top: 0; left: 0; right: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 11px 7px;
  box-shadow: var(--shadow-sm);
  font-size: 13px;
  cursor: pointer;
  transition: box-shadow .15s, border-color .15s;
}
.bubble.placed { transition: transform .2s ease, box-shadow .15s, border-color .15s; }
.bubble:hover, .bubble.hot { border-color: var(--line-strong); }
.bubble.active { box-shadow: var(--shadow-lg); border-color: var(--line-strong); z-index: 2; }
.b-head { display: flex; align-items: center; gap: 6px; margin-bottom: 5px; color: var(--muted); font-size: 12px; }
.b-head .who { color: var(--ink); font-weight: 600; }
.b-head .kind { margin-left: auto; }
.avatar {
  display: inline-grid;
  place-items: center;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--ink-2);
  color: var(--paper);
  font: 600 10px var(--sans);
}
.avatar.agent { background: var(--agent); color: var(--on-agent); }
.b-change { font: 15px/1.45 var(--serif); }
.b-change del { color: var(--del); text-decoration-thickness: 1.5px; }
.b-change ins { color: var(--ins); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
.b-change .arrow, .b-change .verb { color: var(--muted); font-family: var(--sans); font-size: 12px; }
.b-body { margin-top: 4px; color: var(--ink-2); }
.b-note {
  display: block;
  width: 100%;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--ink);
  font: 13px/1.45 var(--sans);
  resize: none;
  overflow: hidden;
}
.b-note:focus { outline: none; }
.b-actions { display: flex; gap: 2px; margin: 6px -6px 0; }
.b-actions button { font-size: 12px; color: var(--ink-2); padding: 3px 7px; }
.b-actions .accept { color: var(--ins); font-weight: 600; }
.bulk {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 12px;
  color: var(--muted);
  padding: 2px 2px 0;
}
.bulk span { margin-right: auto; white-space: nowrap; }
.bulk button { font-size: 12px; color: var(--ink-2); padding: 3px 6px; white-space: nowrap; }

/* Selection popover */
.popover {
  position: fixed;
  z-index: 50;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  padding: 4px;
  animation: pop-in .12s ease-out;
}
@keyframes pop-in { from { opacity: 0; transform: translateY(4px); } }
.pop-row { display: flex; align-items: center; gap: 2px; }
.pop-row button { font-size: 13px; padding: 4px 9px; }
.pop-sep { width: 1px; height: 18px; background: var(--line); margin: 0 3px; }
.swatch { width: 26px; height: 26px; padding: 0 !important; display: grid; place-items: center; }
.swatch::before { content: ""; width: 16px; height: 16px; border-radius: 50%; box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .1); }
.swatch-yellow::before { background: var(--hl-yellow); }
.swatch-green::before { background: var(--hl-green); }
.swatch-blue::before { background: var(--hl-blue); }
.swatch-pink::before { background: var(--hl-pink); }
.pop-clear { color: var(--muted); }
.pop-form { display: flex; gap: 6px; align-items: flex-end; padding: 6px 4px 3px; border-top: 1px solid var(--line); margin-top: 4px; }
.pop-form textarea {
  flex: 1;
  min-width: 260px;
  font: 14px/1.4 var(--sans);
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 6px 8px;
  resize: vertical;
}