:root {
  --advanced-ink: #263642;
  --advanced-muted: #65747d;
  --advanced-teal: #2f817a;
  --advanced-teal-soft: #e6f3ef;
  --advanced-blue: #537ba5;
  --advanced-blue-soft: #eaf1f8;
  --advanced-lavender: #7669a7;
  --advanced-lavender-soft: #f0edf8;
  --advanced-amber: #a86f27;
  --advanced-amber-soft: #fbf0dc;
  --advanced-coral: #b85f5a;
  --advanced-coral-soft: #fae9e6;
  --advanced-paper: #fffdf9;
  --advanced-border: rgba(58, 79, 88, 0.15);
}

.stage-rail {
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.stage-rail .stage {
  gap: 7px;
  min-height: 88px;
  padding: 15px 11px;
}

.stage-rail .stage b {
  font-size: 22px;
  line-height: 1;
}

.stage-rail .stage span {
  overflow: visible;
  font-size: clamp(17px, 1.25vw, 19px);
  line-height: 1.35;
  text-overflow: clip;
  white-space: normal;
}

.stage-rail .stage::before {
  height: 6px;
}

.stage-rail .stage.active::before {
  background-size: 180% 100%;
  animation: advanced-stage-breathe 3.2s ease-in-out infinite;
}

.stage-advanced {
  background: linear-gradient(145deg, #fffaf3, #f0f4fb);
}

.stage-advanced.active {
  border-color: rgba(118, 105, 167, 0.55);
  box-shadow: 0 12px 28px rgba(94, 83, 137, 0.14);
}

.advanced-entry-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px 24px;
  align-items: center;
  margin: 12px;
  padding: 20px 22px;
  border: 1px solid rgba(83, 123, 165, 0.22);
  border-radius: 20px;
  background:
    radial-gradient(circle at 94% 4%, rgba(240, 187, 105, 0.18), transparent 34%),
    linear-gradient(135deg, rgba(234, 241, 248, 0.88), rgba(255, 253, 249, 0.96) 52%, rgba(240, 237, 248, 0.78));
}

.advanced-entry-strip:hover {
  border-color: rgba(83, 123, 165, 0.36);
  box-shadow: 0 16px 36px rgba(83, 123, 165, 0.1);
}

.advanced-entry-strip strong,
.advanced-entry-strip p,
.advanced-entry-strip span {
  display: block;
}

.advanced-entry-strip strong {
  margin-top: 5px;
  color: var(--advanced-ink);
  font-size: 17px;
  line-height: 1.55;
}

.advanced-entry-strip p {
  margin: 5px 0 0;
  color: var(--advanced-muted);
  line-height: 1.65;
}

.advanced-entry-kicker {
  color: var(--advanced-lavender);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.advanced-entry-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
}

.advanced-entry-actions .button {
  min-height: 46px;
  padding-inline: 24px;
  font-size: 16px;
}

.advanced-entry-strip > .api-connection-status {
  grid-column: 1 / -1;
  margin: 0;
}

.advanced-generation-progress {
  margin: 16px 0 4px;
  padding: 18px 20px;
  border: 1px solid rgba(83, 123, 165, 0.2);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(234, 241, 248, 0.92), rgba(255, 253, 249, 0.98));
  box-shadow: 0 12px 30px rgba(83, 123, 165, 0.08);
}

.advanced-generation-progress-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.advanced-generation-progress-copy strong {
  color: var(--advanced-ink);
  font-size: 16px;
}

.advanced-generation-progress-copy span {
  color: var(--advanced-blue);
  font-size: 15px;
  font-weight: 900;
}

.advanced-generation-track {
  height: 11px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(83, 123, 165, 0.13);
}

.advanced-generation-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--advanced-blue), var(--advanced-teal), #71b99d);
  box-shadow: 0 0 18px rgba(47, 129, 122, 0.34);
  transition: width 0.48s ease;
}

.advanced-generation-progress[data-state="loading"] .advanced-generation-track span {
  background-size: 180% 100%;
  animation: advanced-progress-flow 1.8s linear infinite;
}

.advanced-generation-progress[data-state="error"] {
  border-color: rgba(184, 95, 90, 0.3);
  background: var(--advanced-coral-soft);
}

.advanced-generation-progress[data-state="error"] .advanced-generation-track span {
  background: var(--advanced-coral);
}

.advanced-learning-panel {
  grid-column: 1 / -1;
  margin: 0;
  padding: 30px;
  border: 1px solid var(--advanced-border);
  border-radius: 28px;
  color: var(--advanced-ink);
  background:
    radial-gradient(circle at 5% 4%, rgba(83, 123, 165, 0.11), transparent 28%),
    radial-gradient(circle at 95% 3%, rgba(184, 95, 90, 0.09), transparent 30%),
    var(--advanced-paper);
  box-shadow: 0 24px 58px rgba(48, 67, 75, 0.1);
}

.advanced-learning-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(290px, 0.72fr);
  gap: 24px;
  align-items: center;
  padding: 6px 4px 26px;
}

.advanced-learning-hero h2 {
  margin: 5px 0 8px;
  font-size: clamp(28px, 3vw, 42px);
  letter-spacing: -0.04em;
}

.advanced-learning-hero p {
  margin: 0;
  color: var(--advanced-muted);
  line-height: 1.75;
}

.advanced-syllabus-badge {
  display: block;
  padding: 18px 20px;
  border: 1px solid rgba(47, 129, 122, 0.22);
  border-radius: 18px;
  color: #24665f;
  background: linear-gradient(135deg, var(--advanced-teal-soft), #f4f8f5);
  font-weight: 850;
  line-height: 1.7;
}

.advanced-learning-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 20px;
  align-items: center;
  padding: 24px 178px 24px 24px;
  border: 1px solid rgba(168, 111, 39, 0.18);
  border-radius: 22px;
  background: linear-gradient(135deg, #fffaf1, #fffdf9 58%, #f8f3fb);
}

.advanced-control-copy span,
.advanced-control-copy strong,
.advanced-control-copy p {
  display: block;
}

.advanced-control-copy span {
  color: var(--advanced-amber);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.advanced-control-copy strong {
  margin-top: 5px;
  font-size: 18px;
}

.advanced-control-copy p {
  margin: 5px 0 0;
  color: var(--advanced-muted);
}

.advanced-count-switch {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 5px;
  border: 1px solid rgba(83, 123, 165, 0.19);
  border-radius: 15px;
  background: rgba(255, 255, 255, 0.78);
}

.advanced-count-switch label {
  cursor: pointer;
}

.advanced-count-switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.advanced-count-switch span {
  display: block;
  min-width: 74px;
  padding: 10px 15px;
  border-radius: 11px;
  text-align: center;
  font-weight: 850;
  transition: 0.18s ease;
}

.advanced-count-switch input:checked + span {
  color: white;
  background: linear-gradient(135deg, var(--advanced-blue), var(--advanced-lavender));
  box-shadow: 0 7px 16px rgba(83, 100, 150, 0.22);
}

.advanced-count-switch input:focus-visible + span {
  outline: 3px solid rgba(83, 123, 165, 0.3);
  outline-offset: 2px;
}

.advanced-generate-button {
  min-height: 48px;
}

.advanced-round-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 18px 0 0;
}

.advanced-round-meta p {
  margin: 0;
  padding: 14px 16px;
  border-radius: 15px;
  color: var(--advanced-muted);
  background: var(--advanced-blue-soft);
  line-height: 1.6;
}

.advanced-round-meta p:last-child {
  background: var(--advanced-lavender-soft);
}

.advanced-question-workspace {
  margin-top: 24px;
}

.advanced-workspace-toolbar {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border: 1px solid rgba(47, 129, 122, 0.18);
  border-radius: 18px;
  background: var(--advanced-teal-soft);
}

.advanced-workspace-toolbar div:first-child {
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.advanced-workspace-toolbar span {
  color: var(--advanced-teal);
  font-weight: 900;
}

.advanced-completion-bar {
  width: min(380px, 48%);
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(47, 129, 122, 0.14);
}

.advanced-completion-bar span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--advanced-teal), #72a8a0);
  transition: width 0.25s ease;
}

.advanced-question-navigator {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0;
}

.advanced-question-nav-button {
  width: 38px;
  height: 38px;
  border: 1px solid rgba(83, 123, 165, 0.2);
  border-radius: 12px;
  color: var(--advanced-blue);
  background: white;
  cursor: pointer;
  font-weight: 900;
}

.advanced-question-nav-button.answered {
  color: white;
  border-color: transparent;
  background: var(--advanced-blue);
}

.advanced-question-nav-button.correct {
  background: var(--advanced-teal);
}

.advanced-question-nav-button.incorrect {
  background: var(--advanced-coral);
}

.advanced-questions {
  display: grid;
  gap: 20px;
}

.advanced-shared-group {
  display: grid;
  gap: 18px;
  padding: 22px;
  border: 1px solid rgba(118, 105, 167, 0.3);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(238, 234, 249, 0.9), rgba(255, 253, 249, 0.94));
  box-shadow: 0 14px 34px rgba(87, 74, 132, 0.09);
}

.advanced-shared-stem {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  margin: 0;
  padding: 18px 20px;
  border: 1px solid rgba(118, 105, 167, 0.3);
  border-left: 6px solid var(--advanced-lavender);
  border-radius: 16px;
  background: linear-gradient(135deg, #ffffff, #f7f4ff);
  color: #24364a;
  font-size: 18px;
  font-weight: 780;
  line-height: 1.8;
  white-space: pre-wrap;
  box-shadow: 0 9px 22px rgba(87, 74, 132, 0.08);
}

.advanced-shared-stem p {
  margin: 0;
}

.advanced-shared-label {
  align-self: start;
  padding: 7px 11px;
  border-radius: 10px;
  color: white;
  background: linear-gradient(135deg, #7669a7, #917fc4);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.advanced-shared-stem.is-option-bank {
  background: linear-gradient(135deg, #fdfcff, #f2effb);
}

.advanced-shared-option-bank {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.advanced-shared-option-bank > div {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  min-height: 56px;
  padding: 12px 13px;
  border: 1px solid rgba(118, 105, 167, 0.22);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.9);
  line-height: 1.55;
}

.advanced-shared-option-bank b {
  color: var(--advanced-lavender);
  font-size: 16px;
}

.advanced-shared-option-bank span {
  font-weight: 700;
}

.advanced-question-card {
  scroll-margin-top: 22px;
  padding: 24px;
  border: 1px solid var(--advanced-border);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 30px rgba(55, 76, 84, 0.07);
}

.advanced-question-card[data-type="A2"],
.advanced-question-card[data-type="A3/A4"] {
  border-top: 4px solid rgba(83, 123, 165, 0.72);
}

.advanced-question-card[data-type="B1"],
.advanced-question-card[data-type="B2"] {
  border-top: 4px solid rgba(118, 105, 167, 0.72);
}

.advanced-question-heading {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.advanced-question-number,
.advanced-question-type {
  flex: 0 0 auto;
  padding: 5px 9px;
  border-radius: 9px;
  font-size: 12px;
  font-weight: 900;
}

.advanced-question-number {
  color: var(--advanced-teal);
  background: var(--advanced-teal-soft);
}

.advanced-question-type {
  color: var(--advanced-lavender);
  background: var(--advanced-lavender-soft);
}

.advanced-question-stem {
  margin: 0;
  font-size: 17px;
  font-weight: 780;
  line-height: 1.8;
  white-space: pre-wrap;
}

.advanced-option-list {
  display: grid;
  gap: 10px;
  margin-top: 17px;
}

.advanced-option-list.is-key-only {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.advanced-option-list.is-key-only .advanced-option {
  display: flex;
  grid-template-columns: none;
  justify-content: center;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 10px 12px;
  font-size: 17px;
  font-weight: 900;
}

.advanced-option-list.is-key-only .advanced-option input {
  margin-top: 0;
}

.advanced-option {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 15px;
  border: 1px solid rgba(83, 123, 165, 0.16);
  border-radius: 14px;
  background: #fbfcfd;
  cursor: pointer;
  line-height: 1.65;
  transition: border-color 0.16s ease, background 0.16s ease, transform 0.16s ease;
}

.advanced-option:hover {
  border-color: rgba(83, 123, 165, 0.4);
  transform: translateY(-1px);
}

.advanced-option input {
  margin-top: 5px;
  accent-color: var(--advanced-blue);
}

.advanced-option:has(input:checked) {
  border-color: rgba(83, 123, 165, 0.58);
  background: var(--advanced-blue-soft);
}

.advanced-option.correct-option {
  border-color: rgba(47, 129, 122, 0.55);
  background: var(--advanced-teal-soft);
}

.advanced-option.incorrect-option {
  border-color: rgba(184, 95, 90, 0.52);
  background: var(--advanced-coral-soft);
}

.advanced-explanation {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid rgba(184, 95, 90, 0.16);
  border-radius: 16px;
  background: #fffaf8;
}

.advanced-knowledge-point {
  margin: 0 0 10px;
  color: var(--advanced-coral);
  font-weight: 950;
}

.advanced-personalization-focus {
  display: inline-flex;
  margin: 0 0 12px;
  padding: 7px 11px;
  border: 1px solid rgba(118, 105, 167, 0.2);
  border-radius: 999px;
  color: #62548f;
  background: var(--advanced-lavender-soft);
  font-size: 14px;
  font-weight: 900;
}

.advanced-answer-line,
.advanced-rationale,
.advanced-source-line {
  margin: 8px 0 0;
  line-height: 1.7;
}

.advanced-source-line {
  color: var(--advanced-muted);
  font-size: 13px;
}

.advanced-source-line a {
  color: var(--advanced-blue);
  font-weight: 800;
}

.advanced-distractors {
  margin-top: 12px;
}

.advanced-correct-details {
  margin-top: 12px;
}

.advanced-correct-details > summary,
.advanced-distractors summary {
  color: var(--advanced-lavender);
  cursor: pointer;
  font-weight: 850;
}

.advanced-distractors p {
  margin: 8px 0 0;
  color: var(--advanced-muted);
  line-height: 1.65;
}

.advanced-followup {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-top: 16px;
}

.advanced-followup textarea {
  min-height: 78px;
  resize: vertical;
  padding: 12px 14px;
  border: 1px solid rgba(83, 123, 165, 0.24);
  border-radius: 13px;
  color: var(--advanced-ink);
  background: white;
  line-height: 1.6;
}

.advanced-followup button {
  align-self: end;
}

.advanced-followup-answer {
  grid-column: 1 / -1;
  margin: 0;
  padding: 13px 15px;
  border-radius: 13px;
  color: var(--advanced-ink);
  background: var(--advanced-blue-soft);
  line-height: 1.7;
  white-space: pre-wrap;
}

.advanced-submit-button {
  display: block;
  min-width: 230px;
  margin: 22px auto 0;
}

.advanced-round-result {
  display: flex;
  gap: 24px;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  padding: 24px 26px;
  border: 1px solid rgba(47, 129, 122, 0.21);
  border-radius: 22px;
  background: linear-gradient(135deg, var(--advanced-teal-soft), #fffdf9 54%, var(--advanced-amber-soft));
}

.advanced-round-result span,
.advanced-round-result strong,
.advanced-round-result p {
  display: block;
}

.advanced-round-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.advanced-followup-source {
  display: block;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(83, 123, 165, 0.16);
  color: var(--advanced-muted);
  font-size: 14px;
}

.advanced-personalization-guidance {
  display: grid;
  gap: 5px;
  margin: 0 0 14px;
  padding: 12px 14px;
  border-left: 4px solid #7567a7;
  border-radius: 10px;
  color: #40385f;
  background: rgba(118, 105, 167, 0.09);
  line-height: 1.7;
}

.advanced-personalization-guidance strong {
  color: #5d4f91;
}

.advanced-followup-source a {
  color: var(--advanced-blue);
  font-weight: 800;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.advanced-round-result span {
  color: var(--advanced-teal);
  font-size: 13px;
  font-weight: 900;
}

.advanced-round-result strong {
  margin-top: 3px;
  font-size: 30px;
}

.advanced-round-result p {
  margin: 3px 0 0;
  color: var(--advanced-muted);
}

.advanced-loading .advanced-generate-button,
.advanced-loading .advanced-count-switch {
  opacity: 0.58;
  pointer-events: none;
}

.advanced-question-card.is-incorrect {
  border-color: rgba(184, 95, 90, 0.36);
  box-shadow: 0 12px 32px rgba(184, 95, 90, 0.1);
}

.advanced-question-card.is-correct {
  border-color: rgba(47, 129, 122, 0.3);
}

@media (max-width: 980px) {
  .advanced-entry-strip,
  .advanced-learning-hero,
  .advanced-learning-controls {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .advanced-entry-actions {
    justify-content: flex-start;
  }

  .advanced-count-switch {
    width: max-content;
  }
}

@media (prefers-reduced-motion: reduce) {
  .advanced-question-nav-button,
  .advanced-option,
  .advanced-completion-bar span {
    transition: none;
  }

  .stage-rail .stage.active::before,
  .advanced-generation-progress[data-state="loading"] .advanced-generation-track span {
    animation: none;
  }
}

@keyframes advanced-stage-breathe {
  0%, 100% { background-position: 0 50%; opacity: 0.88; }
  50% { background-position: 100% 50%; opacity: 1; }
}

@keyframes advanced-progress-flow {
  from { background-position: 0 50%; }
  to { background-position: 180% 50%; }
}