html, body { overflow-x: clip; }

.interactive-experience {
  --it-violet: var(--violet-900, #4b3b78);
  --it-gold: var(--gold, #b8954f);
  --it-green: #34735d;
  --it-rose: #9b4d59;
  padding: 28px 0 72px;
  background:
    radial-gradient(circle at 12% 8%, rgba(184, 149, 79, .13), transparent 29%),
    radial-gradient(circle at 88% 28%, rgba(75, 59, 120, .1), transparent 30%),
    #fbf6e9;
  border-block: 1px solid rgba(184, 149, 79, .2);
}

.interactive-experience[hidden],
.exercise-section[hidden] { display: none !important; }

.experience-switch-wrap {
  padding: 18px 0;
  background: #fffaf1;
  border-block: 1px solid rgba(184, 149, 79, .2);
}

.experience-switch {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  max-width: 720px;
  margin: 0 auto;
  padding: 6px;
  border: 1px solid rgba(75, 59, 120, .16);
  border-radius: 18px;
  background: rgba(255, 255, 255, .8);
  box-shadow: 0 10px 28px rgba(60, 45, 32, .06);
}

.experience-switch button {
  min-height: 54px;
  padding: 10px 16px;
  border: 0;
  border-radius: 13px;
  color: #4b3b78;
  background: transparent;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.experience-switch button small {
  display: block;
  margin-top: 2px;
  color: #77717f;
  font-size: .72rem;
  font-weight: 600;
}

.experience-switch button[aria-selected="true"] {
  color: #fff;
  background: #4b3b78;
  box-shadow: 0 8px 18px rgba(75, 59, 120, .2);
}

.experience-switch button[aria-selected="true"] small { color: rgba(255, 255, 255, .8); }

.interactive-shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.it-topbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px 20px;
  align-items: end;
  margin-bottom: 18px;
}

.it-topbar p, .it-topbar strong { margin: 0; }

.it-kicker {
  color: #7c5a22;
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.it-step-label {
  display: block;
  margin-top: 4px;
  color: var(--it-violet);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.it-progress-value { color: var(--it-violet); font-size: .92rem; }

.it-progress-track {
  grid-column: 1 / -1;
  height: 8px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(75, 59, 120, .1);
}

.it-progress-track span {
  display: block;
  width: var(--it-progress, 0%);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #4b3b78, #b8954f);
  transition: width 320ms ease;
}

.it-card {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  padding: clamp(24px, 5vw, 52px);
  border: 1px solid rgba(184, 149, 79, .34);
  border-radius: 28px;
  background: rgba(255, 252, 245, .98);
  box-shadow: 0 22px 58px rgba(55, 42, 30, .11);
}

.it-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  content: "";
  background: linear-gradient(90deg, #4b3b78, #b8954f, #4b3b78);
}

.it-panel { animation: it-enter 260ms ease both; }
.it-panel[hidden] { display: none !important; }

@keyframes it-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.it-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 14px;
  color: #7c5a22;
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.it-eyebrow::before { width: 30px; height: 2px; content: ""; background: #b8954f; }

.it-panel h2 {
  max-width: 760px;
  margin: 0;
  color: var(--it-violet);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.8rem, 5vw, 3.25rem);
  line-height: 1.06;
}

.it-panel h3 { color: var(--it-violet); font-family: Georgia, "Times New Roman", serif; }
.it-panel h2[tabindex="-1"]:focus { outline: none; }

.it-lead {
  max-width: 720px;
  margin: 18px 0 0;
  color: #57515f;
  font-size: clamp(1rem, 2vw, 1.13rem);
  line-height: 1.7;
}

.it-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.it-badges li {
  padding: 8px 12px;
  border: 1px solid rgba(75, 59, 120, .15);
  border-radius: 99px;
  color: #554b67;
  background: #fff;
  font-size: .86rem;
  font-weight: 700;
}

.it-steps-preview, .it-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 28px 0;
}

.it-steps-preview span {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 10px 12px;
  border-radius: 14px;
  color: #514b59;
  background: #f4efe5;
  font-size: .88rem;
  font-weight: 750;
}

.it-steps-preview b {
  display: grid;
  width: 27px;
  height: 27px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: #4b3b78;
  font-size: .76rem;
}

.it-options, .it-order-source, .it-highlight-answer { display: grid; gap: 11px; margin-top: 26px; }

.it-option, .it-order-card, .it-rating-button, .it-match-card, .it-highlight-fragment {
  position: relative;
  width: 100%;
  padding: 17px 18px;
  border: 1px solid rgba(75, 59, 120, .18);
  border-radius: 16px;
  color: #302c38;
  background: #fff;
  font: inherit;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease, background 160ms ease;
}

.it-option:hover, .it-order-card:hover, .it-rating-button:hover, .it-match-card:hover, .it-highlight-fragment:hover {
  border-color: rgba(75, 59, 120, .48);
  transform: translateY(-1px);
  box-shadow: 0 9px 20px rgba(75, 59, 120, .08);
}

.it-option[aria-pressed="true"], .it-order-card[aria-pressed="true"], .it-rating-button[aria-pressed="true"], .it-match-card[aria-pressed="true"], .it-highlight-fragment[aria-pressed="true"] {
  border-color: var(--it-violet);
  background: #f2eefb;
  box-shadow: 0 0 0 3px rgba(75, 59, 120, .1);
}

.it-option[data-result="correct"], .it-match-card[data-result="correct"], .it-highlight-fragment[data-result="correct"] { border-color: var(--it-green); background: #edf7f2; }
.it-option[data-result="wrong"], .it-match-card[data-result="wrong"], .it-highlight-fragment[data-result="wrong"] { border-color: var(--it-rose); background: #fcf0f1; }

.it-option-letter {
  display: inline-grid;
  width: 29px;
  height: 29px;
  margin-right: 9px;
  place-items: center;
  border-radius: 50%;
  color: var(--it-violet);
  background: rgba(75, 59, 120, .09);
  font-size: .8rem;
  font-weight: 900;
}

.it-order-card { padding-left: 58px; }
.it-order-number {
  position: absolute;
  top: 50%;
  left: 16px;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid rgba(75, 59, 120, .2);
  border-radius: 50%;
  color: #786f83;
  background: #faf8f4;
  font-size: .82rem;
  font-weight: 900;
  transform: translateY(-50%);
}

.it-order-card[aria-pressed="true"] .it-order-number { color: #fff; background: var(--it-violet); }
.it-order-role { display: none; margin-bottom: 5px; color: #7c5a22; font-size: .7rem; font-weight: 900; letter-spacing: .09em; text-transform: uppercase; }
.it-order-source[data-solved="true"] .it-order-role { display: block; }

.it-selection-count {
  margin: 11px 0 0;
  color: #6b6372;
  font-size: .86rem;
  font-weight: 800;
  text-align: right;
}

.it-match-workspace {
  display: grid;
  grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
  gap: 14px;
  margin-top: 26px;
}

.it-match-column { padding: 15px; border: 1px solid rgba(75, 59, 120, .12); border-radius: 18px; background: #f8f5ee; }
.it-match-column .it-kicker { margin: 0 0 10px; color: #7c5a22; }
.it-match-list { display: grid; gap: 10px; }
.it-match-card { display: flex; align-items: flex-start; gap: 10px; min-height: 76px; padding: 14px; }
.it-match-card strong { color: var(--it-violet); }
.it-match-index, .it-highlight-number {
  display: grid;
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  color: var(--it-violet);
  background: rgba(75, 59, 120, .09);
  font-size: .78rem;
  font-weight: 900;
}
.it-match-card[data-matched="true"] { border-color: var(--it-green); background: #edf7f2; opacity: 1; cursor: default; }
.it-match-card[data-matched="true"] .it-match-index { color: #fff; background: var(--it-green); }

.it-highlight-answer { padding: 14px; border: 1px solid rgba(184, 149, 79, .28); border-radius: 18px; background: #f8f1df; }
.it-highlight-fragment { display: flex; gap: 12px; align-items: flex-start; padding: 16px; }
.it-highlight-fragment[aria-pressed="true"] .it-highlight-number { color: #fff; background: var(--it-violet); }

.it-completion-stem {
  margin: 24px 0 -10px;
  padding: 15px 17px;
  border-left: 4px solid #b8954f;
  border-radius: 0 13px 13px 0;
  color: #4b3b78;
  background: #f5edd8;
  font-size: 1.05rem;
}

.it-feedback {
  min-height: 28px;
  margin: 18px 0 0;
  padding: 13px 15px;
  border-radius: 13px;
  color: #5e5865;
  background: #f4f0e8;
  line-height: 1.55;
}

.it-feedback:empty { display: none; }
.it-feedback[data-state="correct"] { color: #235a47; background: #e9f5ef; }
.it-feedback[data-state="wrong"] { color: #7e3541; background: #fbecef; }

.it-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 24px; }

.it-button, .it-button-secondary, .it-text-button {
  min-height: 48px;
  padding: 12px 20px;
  border-radius: 99px;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

.it-button { border: 1px solid var(--it-violet); color: #fff; background: var(--it-violet); box-shadow: 0 10px 22px rgba(75, 59, 120, .17); text-decoration: none; }
.it-button:hover { color: #fff; background: #3f3167; }
.it-button-secondary { border: 1px solid var(--it-violet); color: var(--it-violet); background: transparent; }
.it-text-button { border: 0; color: #625a6a; background: transparent; text-decoration: underline; text-underline-offset: 3px; }
.it-button:disabled, .it-button-secondary:disabled { opacity: .48; cursor: not-allowed; box-shadow: none; }

.it-question-quote {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 4px solid #b8954f;
  border-radius: 0 14px 14px 0;
  color: #403947;
  background: #f5edd8;
  font-size: 1.02rem;
  line-height: 1.65;
}

.it-speaking-grid { display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.25fr); gap: 16px; margin-top: 26px; }
.it-timer, .it-recorder, .it-answer-points, .it-course-result { padding: 20px; border: 1px solid rgba(75, 59, 120, .14); border-radius: 18px; background: #fff; }
.it-timer-display { margin: 5px 0 16px; color: var(--it-violet); font: 800 clamp(2.5rem, 8vw, 4.4rem)/1 Georgia, "Times New Roman", serif; font-variant-numeric: tabular-nums; }
.it-speaking-plan { display: grid; gap: 8px; margin: 16px 0 0; padding: 0; list-style: none; }
.it-speaking-plan li { padding: 9px 11px; border-radius: 10px; color: #554e5b; background: #f4f0e8; font-size: .86rem; }

.it-record-state { display: inline-flex; align-items: center; gap: 8px; margin: 4px 0 14px; color: #625b68; font-size: .88rem; font-weight: 750; }
.it-record-state::before { width: 9px; height: 9px; content: ""; border-radius: 50%; background: #aaa4ae; }
.it-record-state[data-recording="true"]::before { background: #b13c4a; box-shadow: 0 0 0 5px rgba(177, 60, 74, .12); animation: it-pulse 1.2s ease infinite; }
@keyframes it-pulse { 50% { box-shadow: 0 0 0 9px rgba(177, 60, 74, 0); } }
.it-audio { width: 100%; margin-top: 14px; }
.it-local-note { display: block; margin: 14px 0 0; color: #77717d; font-size: .78rem; line-height: 1.5; }

.it-commission-answer { display: grid; gap: 8px; margin-top: 22px; }
.it-commission-answer textarea { width: 100%; min-height: 116px; padding: 14px; resize: vertical; border: 1px solid rgba(75, 59, 120, .22); border-radius: 14px; color: #302c38; background: #fff; font: inherit; line-height: 1.55; }
.it-answer-points { margin-top: 18px; background: #f2f7f3; }
.it-answer-points ul { padding-left: 20px; line-height: 1.65; }
.it-rating { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; margin-top: 17px; }
.it-rating-button { min-height: 66px; padding: 12px; text-align: center; font-size: .87rem; font-weight: 800; }

.it-result-mark { display: grid; width: 66px; height: 66px; margin-bottom: 20px; place-items: center; border-radius: 50%; color: #fff; background: linear-gradient(145deg, #4b3b78, #6f5aa2); box-shadow: 0 14px 30px rgba(75, 59, 120, .2); font-size: 2rem; }
.it-summary-grid div { padding: 15px; border-radius: 14px; background: #f4f0e8; }
.it-summary-grid span, .it-summary-grid strong { display: block; }
.it-summary-grid span { margin-bottom: 5px; color: #77707c; font-size: .75rem; }
.it-summary-grid strong { color: #433865; }
.it-repeat-note { margin: 18px 0 0; padding: 14px 16px; border-left: 4px solid #b8954f; border-radius: 0 12px 12px 0; background: #f8f0d9; line-height: 1.55; }

.it-course-result { display: grid; grid-template-columns: 1fr auto; gap: 18px; align-items: center; margin-top: 24px; border-color: rgba(184, 149, 79, .42); background: linear-gradient(135deg, #fff4d6, #fffaf0); }
.it-course-result p, .it-course-result h3 { margin: 0; }
.it-course-result p { margin-top: 7px; color: #5e5660; line-height: 1.5; }
.it-sr-status { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

body.interactive-training-active .mobile-course-dock { opacity: 0; pointer-events: none; transform: translateY(calc(100% + 24px)); }
body.interactive-training-result .mobile-course-dock { opacity: 1; pointer-events: auto; transform: translateY(0); }

@media (max-width: 760px) {
  .experience-switch-wrap { padding: 12px 0; }
  .experience-switch { width: calc(100% - 24px); }
  .experience-switch button { min-height: 50px; padding-inline: 8px; font-size: .87rem; }
  .interactive-experience { padding: 20px 0 92px; }
  .interactive-shell { width: min(100% - 20px, 920px); }
  .it-card { min-height: 0; padding: 25px 17px 28px; border-radius: 22px; }
  .it-panel h2 { font-size: clamp(1.7rem, 9vw, 2.35rem); }
  .it-steps-preview, .it-summary-grid { grid-template-columns: 1fr 1fr; }
  .it-speaking-grid, .it-course-result, .it-match-workspace { grid-template-columns: 1fr; }
  .it-options, .it-order-source, .it-highlight-answer, .it-match-workspace { margin-top: 20px; }
  .it-option, .it-order-card, .it-match-card, .it-highlight-fragment { padding-top: 14px; padding-bottom: 14px; font-size: .95rem; }
  .it-order-card { padding-left: 54px; }
  .it-match-column { padding: 12px; }
  .it-actions { align-items: stretch; }
  .it-actions .it-button, .it-actions .it-button-secondary { flex: 1 1 160px; }
  .it-rating { grid-template-columns: 1fr; }
  .it-rating-button { min-height: 50px; text-align: left; }
  .it-course-result .it-button { width: 100%; text-align: center; }
}

@media (max-width: 440px) {
  .experience-switch button small { display: none; }
  .it-steps-preview, .it-summary-grid { grid-template-columns: 1fr; }
  .it-topbar { grid-template-columns: 1fr; gap: 7px; }
  .it-progress-value { position: absolute; right: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  .it-panel, .it-progress-track span, .it-record-state[data-recording="true"]::before { animation: none; transition: none; }
}