.sourcegrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.chapter {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--soft);
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 12px;
  line-height: 1.6;
  margin: 10px 0;
}
.chapter small {
  display: block;
  font-size: 11px;
}
.readergrid {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
.toc {
  position: sticky;
  top: 16px;
  max-height: 85vh;
  overflow: auto;
}
.toc h3 {
  margin: 16px 0;
}
.readergrid > div {
  min-width: 0;
}
.booktext {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 17px/1.8 Georgia,
    serif;
  padding: 16px;
  background: var(--surface-2);
  margin: 20px 0;
}
.bookframe {
  width: 100%;
  height: 700px;
  border: 0;
}
.translated {
  border-top: 4px solid var(--green-line);
}
.pagecontrols input {
  width: 80px;
  display: inline-block;
}
.readergrid .actions {
  flex-wrap: wrap;
}
.sourcegrid h3 {
  margin: 12px 0;
}
.quiz-topic.selected {
  border: 2px solid var(--green-line);
}
.quiz-topic {
  text-align: left;
  color: var(--ink);
  background: var(--surface);
}
.feedback {
  white-space: pre-wrap;
}
.quiz-review {
  margin: 15px 0;
}
@media (max-width: 850px) {
  .readergrid,
  .sourcegrid {
    grid-template-columns: 1fr;
  }
  .toc {
    position: static;
    max-height: 280px;
  }
  .bookframe {
    height: 500px;
  }
}

/* Questões: recorte, alternativas, correção e navegação */
.qcard {
  padding: 26px 28px;
}
.qmeta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 18px;
}
.qmeta .textbtn {
  padding: 0;
}
.qfigure {
  display: grid;
  gap: 10px;
  justify-items: center;
}
.qcrop {
  position: relative;
  overflow: hidden;
  width: 100%;
  background: var(--surface);
  border-radius: 6px;
}
.qcrop img {
  position: absolute;
  max-width: none;
  height: auto;
  display: block;
}
.fullpage {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
  font-size: 13px;
}
.fullpage summary,
.reason summary,
.qgrid summary,
.qoriginal summary {
  color: var(--green);
  font-weight: 600;
}
.fullpage .exampage {
  margin-top: 10px;
}
.qanswer h3 {
  margin-bottom: 14px;
}
.options {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 72px));
  gap: 10px;
  margin: 4px 0 8px;
}
.opt {
  height: 54px;
  font-size: 18px;
  font-weight: 700;
  background: var(--surface);
  color: var(--ink);
  border: 2px solid var(--line);
  border-radius: 10px;
  padding: 0;
}
.opt:hover {
  border-color: var(--green);
  filter: none;
}
.opt.selected {
  background: var(--btn);
  border-color: var(--btn);
  color: var(--on-btn);
}
.opt.right {
  background: var(--ok-fill);
  border-color: var(--ok-fill);
  color: #fff;
}
.opt.wrong {
  background: var(--bad-fill);
  border-color: var(--bad-fill);
  color: #fff;
}
.opt:disabled {
  opacity: 1;
  cursor: default;
}
.answerline .options {
  grid-template-columns: repeat(5, 40px);
  gap: 6px;
}
.answerline .opt {
  height: 36px;
  font-size: 14px;
}
.answerline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  margin: 16px 0;
}
.answerline > span {
  font-weight: 600;
}
.confidence {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 18px 0 6px;
  font-size: 13px;
}
.confidence > span {
  color: var(--muted);
  margin-right: 4px;
}
.chip {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 12px;
}
.chip.selected {
  background: var(--btn);
  color: var(--on-btn);
  border-color: var(--btn);
}
.reason {
  margin-top: 14px;
  font-size: 13px;
}
.qfeedback {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 10px;
  background: var(--surface-2);
  border-left: 4px solid var(--muted);
}
.qfeedback.ok {
  background: var(--ok-soft);
  border-color: var(--ok-fill);
}
.qfeedback.bad {
  background: var(--bad-soft);
  border-color: var(--bad-fill);
}
.qfeedback .verdict {
  color: var(--ink);
  font-weight: 700;
  font-size: 16px;
  margin: 0 0 4px;
}
.qfeedback p {
  color: var(--ink);
}
.quizbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 20px;
  align-items: center;
}
.qprogress {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}
.qprogress button {
  min-width: 34px;
  height: 34px;
  padding: 0 6px;
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  border: 1px solid var(--line);
  font-size: 12px;
}
.qprogress button.answered {
  background: var(--soft-2);
  color: var(--green);
  border-color: var(--line-strong);
}
.qprogress button.current {
  background: var(--btn);
  color: var(--on-btn);
  border-color: var(--btn);
}
.qprogressbar {
  flex: 1;
  min-width: 200px;
}
.qnav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
}
.qnav button {
  min-width: 140px;
  padding: 13px 18px;
  font-size: 14px;
}
.center {
  text-align: center;
}
.kbdhint {
  margin-top: 18px;
}
.inline {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 14px;
}
.inline input {
  margin: 0;
}
.scorebar {
  display: flex;
  height: 12px;
  border-radius: 10px;
  overflow: hidden;
  background: var(--soft);
  margin: 14px 0 10px;
}
.scorebar i,
.legend i {
  display: block;
  background: var(--soft);
}
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-size: 12px;
  color: var(--muted);
}
.legend span {
  display: flex;
  gap: 6px;
  align-items: center;
}
.legend i {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  border: 1px solid var(--line);
}
.scorebar .ok,
.legend .ok {
  background: var(--ok-fill);
}
.scorebar .bad,
.legend .bad {
  background: var(--bad-fill);
}
.scorebar .none,
.legend .none {
  background: var(--line-strong);
}
.quiz-review summary small {
  display: block;
  margin-top: 4px;
}
.status {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  border-radius: 20px;
  padding: 2px 9px;
  margin-right: 6px;
  background: var(--soft);
  color: var(--muted);
}
.status.ok {
  background: var(--ok-soft);
  color: var(--ok);
}
.status.bad {
  background: var(--bad-soft);
  color: var(--bad);
}
.examhead .chips {
  margin-bottom: 6px;
}
.qgrid {
  margin-top: 10px;
  font-size: 13px;
}
@media (max-width: 650px) {
  .qcard {
    padding: 14px 10px;
  }
  .options {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
  }
  .opt {
    height: 50px;
  }
  .qnav {
    position: sticky;
    bottom: 0;
    background: var(--paper);
    padding: 10px 0;
    margin: 10px -20px 0;
    padding-left: 20px;
    padding-right: 20px;
    border-top: 1px solid var(--line);
    z-index: 3;
  }
  .qnav button {
    flex: 1;
    min-width: 0;
  }
  .kbdhint {
    display: none;
  }
}

/* Leitor de livros */
.readerbar {
  position: sticky;
  top: 0;
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 12px 16px 16px;
  border-radius: 12px;
}
.readerbar .chips {
  margin: 0;
}
.readerbar .progress {
  flex-basis: 100%;
  margin: 2px 0 0;
  height: 4px;
}
.pagenav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.pagenav input {
  width: 76px;
  display: inline-block;
  margin: 0 4px;
  padding: 7px;
}
.pagenav button {
  padding: 8px 13px;
}
.readergrid {
  grid-template-columns: 280px minmax(0, 1fr);
}
.toc {
  top: 96px;
  max-height: calc(100vh - 110px);
}
.toc > details {
  padding: 18px;
}
.toc summary {
  font-weight: 700;
}
.tocsearch {
  display: block;
  font-size: 13px;
  margin: 14px 0 6px;
}
.tocsearch input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 9px 10px;
  font: inherit;
  margin-top: 6px;
}
.hits {
  display: grid;
  gap: 6px;
  max-height: 320px;
  overflow: auto;
}
.hit {
  text-align: left;
  background: var(--surface-2);
  color: var(--ink);
  border: 1px solid var(--line);
  font-weight: 400;
  font-size: 12px;
  line-height: 1.5;
  padding: 8px 10px;
}
.hit.current,
.chapter.current {
  border-color: var(--green);
  box-shadow: inset 3px 0 var(--green);
}
.chapter {
  font-size: 13px;
  padding: 9px 11px;
  margin: 6px 0;
}
.pagehead {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px 16px;
}
.pagehead h3 small {
  display: block;
  font-weight: 400;
  margin-top: 3px;
}
.pagehead .chips {
  margin: 0;
}
.pagecols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.pagecols.lado {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.booktext {
  white-space: normal;
  font: var(--fs, 18px) / 1.75 Georgia, 'Iowan Old Style', 'Times New Roman', serif;
  color: var(--reader-ink);
  background: var(--paper-warm);
  border: 1px solid var(--paper-warm-line);
  border-radius: 10px;
  padding: 28px 34px;
  margin: 0;
  max-width: 76ch;
  overflow-wrap: anywhere;
}
.pagecols.lado .booktext {
  max-width: none;
  padding: 22px 24px;
}
.booktext p {
  color: inherit;
  margin: 0 0 0.9em;
  text-align: left;
  hyphens: auto;
}
.booktext h4 {
  font: 700 1.05em/1.4 var(--body);
  margin: 1.2em 0 0.6em;
  color: var(--ink);
}
.booktext h4:first-child,
.booktext .colname + h4 {
  margin-top: 0;
}
.booktext pre,
.rawpage {
  font: 0.82em/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--paper-warm-2);
  border-radius: 6px;
  padding: 10px 12px;
  overflow-x: auto;
  white-space: pre;
  margin: 0 0 1em;
}
.rawpage {
  background: none;
  padding: 0;
}
.bnum {
  text-align: center;
  font: 12px var(--body);
  color: var(--muted);
  margin-top: 1.4em;
}
.colname {
  display: block;
  font: 700 10px var(--body);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 12px;
}
.translated-text {
  background: var(--surface-2);
  border-color: var(--line);
}
.placeholder {
  font-style: italic;
  color: var(--muted) !important;
}
mark {
  background: var(--mark);
  color: inherit;
  border-radius: 2px;
  padding: 0 1px;
}
.transrow {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: flex-end;
}
.transrow label {
  min-width: 180px;
}
.bookframe {
  height: 80vh;
  border: 1px solid var(--line);
  border-radius: 8px;
}
@media (max-width: 1100px) {
  .pagecols.lado {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 850px) {
  .readergrid {
    grid-template-columns: minmax(0, 1fr);
  }
  .toc {
    top: auto;
  }
  .toc > details:not([open]) {
    padding: 14px 18px;
  }
}
@media (max-width: 650px) {
  .readerbar {
    position: static;
    margin: 0 -20px;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    padding: 10px 16px 12px;
    gap: 8px 10px;
  }
  .readerbar > .secondary {
    padding: 8px 10px;
  }
  .booktext {
    padding: 18px 16px;
    font-size: calc(var(--fs, 18px) - 1px);
  }
  .bookpage {
    padding: 14px 12px;
  }
}
.qsearch {
  max-height: 460px;
  margin-top: 10px;
}
.qhits {
  display: grid;
  gap: 6px;
  margin-top: 6px;
}
.qsearch .hit {
  font-size: 13px;
}
.sourcegrid > *,
.topics > * {
  min-width: 0;
}
.card h3,
.card small,
.chapter {
  overflow-wrap: anywhere;
}
@media (max-width: 850px) {
  .sourcegrid {
    grid-template-columns: minmax(0, 1fr);
  }
}