#mode-rfib {
  --rfib-paper: #fffaf2;
  --rfib-ink: #2c2418;
  --rfib-muted: #6f5f4e;
  --rfib-border: rgba(110, 84, 54, 0.18);
  --rfib-accent: #b86d2d;
  --rfib-accent-soft: rgba(184, 109, 45, 0.14);
  --rfib-success: #1f7a4d;
  --rfib-danger: #9b2f3a;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top right, rgba(184, 109, 45, 0.12), transparent 30%),
    radial-gradient(circle at left bottom, rgba(90, 130, 168, 0.1), transparent 28%),
    linear-gradient(180deg, #fff 0%, #fffdf8 100%);
  padding: 8px 2px 18px;
}

#mode-rfib::before {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: 28px;
  border: 1px solid rgba(184, 109, 45, 0.08);
  pointer-events: none;
}

.rfib-question-selector {
  margin-bottom: 18px;
}

.rfib-header-card,
.rfib-passage-card,
.rfib-support-panel,
.rfib-result-box {
  border: 1px solid var(--rfib-border);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 18px 45px rgba(42, 31, 18, 0.06);
  backdrop-filter: blur(8px);
}

.rfib-header-card {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.9fr);
  gap: 16px;
  padding: 18px;
  margin-bottom: 16px;
}

.rfib-header-copy h2 {
  margin: 6px 0 8px;
  font-family: 'Lora', serif;
  font-size: 1.6rem;
  line-height: 1.15;
  color: var(--rfib-ink);
}

.rfib-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--rfib-accent);
  font-weight: 700;
}

.rfib-header-copy p {
  margin: 0;
  color: var(--rfib-muted);
  line-height: 1.55;
  max-width: 58ch;
}

.rfib-audio-card {
  border-radius: 20px;
  padding: 14px;
  background: linear-gradient(180deg, rgba(248, 239, 226, 0.95), rgba(255, 250, 243, 0.95));
  border: 1px solid rgba(184, 109, 45, 0.16);
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

.rfib-audio-head,
.rfib-support-panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.rfib-audio-title,
.rfib-support-variant {
  font-weight: 700;
  color: var(--rfib-ink);
}

.rfib-audio-note,
.rfib-support-audio-note {
  color: var(--rfib-muted);
  font-size: 0.86rem;
}

.rfib-audio-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.rfib-voice-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(184, 109, 45, 0.14);
}

.rfib-voice-btn,
.rfib-support-toggle {
  border: 0;
  cursor: pointer;
  transition: transform 160ms ease, background-color 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.rfib-voice-btn {
  border-radius: 999px;
  padding: 8px 12px;
  background: transparent;
  color: var(--rfib-muted);
  font-weight: 700;
  font-size: 0.84rem;
}

.rfib-voice-btn.is-active,
.rfib-support-toggle.is-active {
  background: var(--rfib-accent);
  color: white;
  box-shadow: 0 8px 18px rgba(184, 109, 45, 0.28);
}

.rfib-voice-btn:hover,
.rfib-support-toggle:hover {
  transform: translateY(-1px);
}

.rfib-passage-card {
  padding: 18px 18px 8px;
  margin-bottom: 14px;
}

.rfib-cloze-view {
  font-family: 'Lora', serif;
  color: var(--rfib-ink);
  font-size: 1.08rem;
  line-height: 1.95;
}

.rfib-paragraph {
  margin: 0 0 14px;
}

.rfib-text {
  white-space: pre-wrap;
}

.rfib-blank-select {
  appearance: none;
  border: 1px solid rgba(110, 84, 54, 0.22);
  border-radius: 14px;
  background: linear-gradient(180deg, #fff 0%, #fff8ed 100%);
  color: var(--rfib-ink);
  font-family: 'Outfit', sans-serif;
  font-size: 0.96rem;
  padding: 9px 14px;
  margin: 0 4px;
  box-shadow: 0 8px 18px rgba(49, 37, 22, 0.04);
}

.rfib-blank-select:focus {
  outline: none;
  border-color: var(--rfib-accent);
  box-shadow: 0 0 0 3px rgba(184, 109, 45, 0.16);
}

.rfib-blank-select.is-correct {
  border-color: rgba(31, 122, 77, 0.6);
  background: linear-gradient(180deg, #f5fff7, #eefaf2);
}

.rfib-blank-select.is-incorrect {
  border-color: rgba(155, 47, 58, 0.65);
  background: linear-gradient(180deg, #fff6f7, #fff0f1);
}

.rfib-support-toggle-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 12px;
}

.rfib-support-toggle {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--rfib-muted);
  border: 1px solid rgba(110, 84, 54, 0.18);
  font-weight: 700;
}

.rfib-support-panel {
  padding: 16px 18px 18px;
  margin-bottom: 14px;
}

.rfib-support-panel-head {
  margin-bottom: 10px;
}

.rfib-support-text {
  font-family: 'Lora', serif;
  color: var(--rfib-ink);
  line-height: 1.85;
  font-size: 1.02rem;
  margin-bottom: 12px;
}

.rfib-support-audio {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rfib-audio-inline {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.rfib-audio-empty {
  color: var(--rfib-muted);
  font-size: 0.92rem;
  padding: 4px 0;
}

.rfib-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.rfib-result-box {
  padding: 16px 18px;
  min-height: 60px;
}

.rfib-result-box:empty {
  display: none;
}

.rfib-result-box.is-visible {
  display: block;
}

.rfib-result-summary {
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 10px;
}

.rfib-result-summary.is-perfect {
  color: var(--rfib-success);
}

.rfib-result-summary.has-misses {
  color: var(--rfib-danger);
}

.rfib-result-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 10px;
}

.rfib-result-row {
  border-radius: 16px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(110, 84, 54, 0.12);
}

.rfib-result-row.is-correct {
  border-color: rgba(31, 122, 77, 0.18);
  background: rgba(31, 122, 77, 0.06);
}

.rfib-result-row.is-incorrect {
  border-color: rgba(155, 47, 58, 0.18);
  background: rgba(155, 47, 58, 0.06);
}

.rfib-result-index {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--rfib-muted);
  margin-bottom: 4px;
}

.rfib-result-value {
  display: block;
  color: var(--rfib-ink);
  line-height: 1.35;
  word-break: break-word;
}

.rfib-support-audio .modern-btn--play,
.rfib-audio-card .modern-btn--play {
  min-width: 104px;
}

@media (max-width: 900px) {
  .rfib-header-card {
    grid-template-columns: 1fr;
  }

  .rfib-cloze-view {
    font-size: 1rem;
    line-height: 1.8;
  }
}

@media (max-width: 640px) {
  #mode-rfib {
    padding-inline: 0;
  }

  .rfib-header-card,
  .rfib-passage-card,
  .rfib-support-panel,
  .rfib-result-box {
    border-radius: 20px;
  }

  .rfib-audio-actions,
  .rfib-support-toggle-row,
  .rfib-actions {
    gap: 8px;
  }

  .rfib-voice-toggle {
    width: 100%;
    justify-content: space-between;
  }
}