.practice-page,
.practice-status-page {
  width: min(100%, var(--pl-content-wide));
  margin: 0 auto;
  padding: 0;
  text-align: left;
}

.practice-page {
  --practice-control-edge: 1.25rem;
  --practice-header-control-size: 2.75rem;
  --practice-solution-control-size: 2.8rem;
}

.practice-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 1rem;
  color: var(--pl-text-muted) !important;
  font-weight: 700;
  text-decoration: none;
}

.practice-back-link:hover {
  color: var(--pl-text) !important;
}

.practice-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 1.5rem 2rem;
  padding: var(--practice-control-edge);
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-lg) var(--pl-radius-lg) 0 0;
  background: color-mix(in srgb, var(--pl-surface-raised) 94%, transparent);
}

.practice-kicker {
  margin: 0 0 0.65rem;
  color: var(--pl-accent-strong);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: normal;
  text-transform: none;
}

.practice-header h1 {
  margin: 0;
  color: var(--pl-text);
  font-family: inherit;
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.045em;
}

.practice-header h1 span {
  color: var(--pl-text-subtle);
}

.practice-header__status {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.55rem;
}

.practice-header__controls {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.practice-lock-icon,
.practice-share-control svg {
  width: 1rem;
  height: 1rem;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.practice-share-status,
.practice-share-fallback {
  grid-column: 1 / -1;
  min-width: 0;
  margin: 0;
  color: var(--pl-text-muted);
  font-size: 0.8rem;
}

.practice-share-status:empty,
.practice-share-fallback[hidden] {
  display: none;
}

.practice-share-fallback label {
  display: block;
  margin-bottom: 0.4rem;
}

.practice-share-fallback input {
  width: 100%;
}

.practice-course-name,
.practice-review-badge {
  display: inline-flex;
  height: var(--practice-header-control-size);
  min-height: var(--practice-header-control-size);
  align-items: center;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--pl-border);
  border-radius: 999px;
  color: var(--pl-text-muted);
  background: var(--pl-surface-soft);
  font-size: 0.78rem;
  font-weight: 750;
}

.practice-review-badge {
  color: var(--pl-success);
  background: color-mix(in srgb, var(--pl-success) 10%, var(--pl-surface));
}

.practice-progress {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
}

.practice-progress progress {
  width: 100%;
  height: 0.38rem;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  color: var(--pl-accent);
  background: var(--pl-field);
  appearance: none;
}

.practice-progress progress::-webkit-progress-bar {
  border-radius: 999px;
  background: var(--pl-field);
}

.practice-progress progress::-webkit-progress-value {
  border-radius: 999px;
  background: var(--pl-accent);
}

.practice-progress progress::-moz-progress-bar {
  border-radius: 999px;
  background: var(--pl-accent);
}

.practice-progress span {
  color: var(--pl-text-subtle);
  font-size: 0.75rem;
}

.practice-workspace {
  overflow: hidden;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-lg);
  background: var(--pl-surface-raised);
  box-shadow: var(--pl-shadow-soft);
}

/* Learner practice joins its header; standalone author previews keep all corners. */
.practice-header + .practice-workspace {
  border-top: 0;
  border-radius: 0 0 var(--pl-radius-lg) var(--pl-radius-lg);
}

.practice-workspace .practice-panel-heading {
  margin: 0;
  color: var(--pl-accent-strong);
  font-size: 0.875rem;
  font-weight: 650;
  letter-spacing: normal;
  line-height: 1.4;
  text-transform: none;
}

.practice-problem {
  width: 100%;
}

.practice-problem__body {
  padding: clamp(1.25rem, 3vw, 2rem);
  border-top: 1px solid var(--pl-border);
}

.practice-math {
  max-width: 100%;
  color: var(--pl-text);
  overflow-wrap: anywhere;
}

.practice-math--problem {
  max-width: 70rem;
  font-size: clamp(1rem, 2vw, 1.18rem);
  font-weight: 400;
  letter-spacing: normal;
  line-height: 1.75;
}

/*
 * Legacy course banks store prompts inside heading tags. The practice
 * workspace already supplies the prompt typography, so allowing the browser's
 * heading scale to compound here makes inline MathJax noticeably oversized.
 */
.practice-math--problem :is(h1, h2, h3, h4, h5, h6) {
  margin: 0;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
}

.practice-math--problem > :first-child,
.practice-math--solution > :first-child {
  margin-top: 0;
}

.practice-math--problem > :last-child,
.practice-math--solution > :last-child {
  margin-bottom: 0;
}

.practice-math img {
  max-width: 100%;
  height: auto;
}

.practice-math mjx-container[display="true"] {
  max-width: 100%;
  margin: 1.25em 0 !important;
  padding: 0.15rem 0 0.55rem;
  overflow-x: auto;
  overflow-y: hidden;
}

.practice-solution {
  border-top: 1px solid var(--pl-border);
}

.app-body .practice-locked-action {
  display: flex;
  min-height: 3.5rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  padding: 0.75rem 1.25rem;
  color: var(--pl-text);
  font-weight: 720;
  text-decoration: none;
}

.practice-locked-action__requirement {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--pl-text-muted);
  font-size: 0.8rem;
  font-weight: 500;
}

.app-body .practice-locked-action:hover {
  color: var(--pl-text);
  background: var(--pl-accent-soft);
}

.practice-locked-action:focus-visible {
  outline: 3px solid var(--pl-accent);
  outline-offset: -4px;
}

.practice-tutor__locked {
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-md);
  background: var(--pl-surface);
}

.practice-enrollment-link {
  margin: 1.5rem 0 0;
  font-size: 0.9rem;
  text-align: center;
}

#solution,
#tutor,
#completion {
  scroll-margin-top: 1.5rem;
}

.practice-disclosure summary {
  display: flex;
  min-height: 3.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.75rem 1.25rem;
  color: var(--pl-text);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 720;
  list-style: none;
}

.practice-disclosure summary::-webkit-details-marker {
  display: none;
}

.practice-disclosure summary:hover {
  background: color-mix(in srgb, var(--pl-accent-soft) 55%, transparent);
}

.practice-disclosure summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--pl-accent) 32%, transparent);
  outline-offset: -4px;
}

.practice-disclosure__icon {
  display: grid;
  width: var(--practice-solution-control-size);
  height: var(--practice-solution-control-size);
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--pl-border-strong);
  border-radius: 50%;
  color: var(--pl-accent-strong);
  font-size: 1.35rem;
  transition: transform var(--pl-motion-base) var(--pl-ease);
}

.practice-control-glyph {
  display: grid;
  width: 1em;
  height: 1em;
  place-items: center;
  line-height: 1;
  text-align: center;
}

.practice-disclosure__icon .practice-control-glyph {
  transform: translateY(-0.1em);
}

.practice-disclosure[open] .practice-disclosure__icon {
  transform: rotate(45deg);
}

.practice-solution__body {
  border-top: 1px solid var(--pl-border);
  padding: 1.25rem 2rem;
}

.practice-math--solution {
  max-width: 70rem;
  color: var(--pl-text-muted);
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.75;
}

.practice-math--solution + .practice-math--solution {
  padding-top: 0;
  border-top: 1px solid var(--pl-border);
}

.practice-missing-solution {
  max-width: 38rem;
  margin: 0;
  color: var(--pl-text-muted);
}

.practice-source {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--pl-border);
  color: var(--pl-text-subtle);
  font-size: 0.78rem;
}

.practice-source > span {
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: none;
}

.practice-source p,
.practice-source a {
  min-width: 0;
  margin: 0;
  overflow-wrap: anywhere;
}

.practice-completion {
  display: flex;
  align-items: center;
}

.practice-completion form {
  margin: 0;
}

.practice-completion__control,
.app-body .practice-question-navigation__control {
  position: relative;
  display: grid;
  width: var(--practice-header-control-size);
  min-width: var(--practice-header-control-size);
  height: var(--practice-header-control-size);
  min-height: var(--practice-header-control-size);
  flex: 0 0 auto;
  aspect-ratio: 1;
  place-items: center;
  padding: 0;
  border: 1px solid var(--pl-border-strong);
  border-radius: 50%;
  color: var(--pl-text-muted);
  background: var(--pl-surface-raised);
  cursor: pointer;
  font: inherit;
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1;
  text-decoration: none;
  transition:
    color var(--pl-motion-fast) var(--pl-ease),
    border-color var(--pl-motion-fast) var(--pl-ease),
    background-color var(--pl-motion-fast) var(--pl-ease),
    transform var(--pl-motion-fast) var(--pl-ease);
}

.practice-completion__control::before,
.practice-question-navigation__control::before {
  position: absolute;
  inset: -0.25rem;
  content: "";
}

.practice-completion__control::after,
.practice-question-navigation__control::after {
  position: absolute;
  z-index: 2;
  top: calc(100% + 0.65rem);
  right: 0;
  width: max-content;
  max-width: min(19rem, calc(100vw - var(--pl-page-gutter) - var(--pl-page-gutter)));
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-sm);
  color: var(--pl-text);
  background: var(--pl-surface-raised);
  box-shadow: var(--pl-shadow-soft);
  content: attr(data-tooltip);
  font-size: 0.75rem;
  font-weight: 650;
  line-height: 1.35;
  opacity: 0;
  pointer-events: none;
  text-align: left;
  transform: translateY(-0.3rem);
  transition:
    opacity var(--pl-motion-fast) var(--pl-ease),
    transform var(--pl-motion-fast) var(--pl-ease);
}

.practice-question-navigation__control--previous::after {
  right: auto;
  left: 0;
}

.practice-completion__control:hover,
.practice-completion__control:focus-visible,
.app-body .practice-question-navigation__control:hover,
.app-body .practice-question-navigation__control:focus-visible {
  border-color: var(--pl-accent);
  color: var(--pl-on-accent);
  background: var(--pl-accent);
  transform: translateY(-1px);
}

.practice-completion__control:hover::after,
.practice-completion__control:focus-visible::after,
.practice-question-navigation__control:hover::after,
.practice-question-navigation__control:focus-visible::after {
  opacity: 1;
  transform: translateY(0);
}

.practice-completion__control:focus-visible,
.practice-question-navigation__control:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--pl-accent) 32%, transparent);
  outline-offset: 3px;
}

.practice-completion__control:active,
.practice-question-navigation__control:active {
  transform: translateY(0) scale(0.97);
}

.practice-completion__control--complete {
  border-color: var(--pl-accent);
  color: var(--pl-on-accent);
  background: var(--pl-accent);
  cursor: default;
}

.practice-tutor {
  width: 100%;
  margin: clamp(1.2rem, 3vw, 2rem) 0 0;
}

.practice-tutor__conversation {
  overflow: hidden;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-md);
  background: color-mix(in srgb, var(--pl-page) 65%, var(--pl-surface));
}

.practice-tutor__unavailable {
  display: grid;
  min-height: 8rem;
  place-items: center;
  align-content: center;
  gap: 1rem;
  padding: 2rem;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-md);
  color: var(--pl-text-muted);
  background: color-mix(in srgb, var(--pl-page) 65%, var(--pl-surface));
  text-align: center;
}

.practice-tutor__unavailable span {
  display: grid;
  width: 3.5rem;
  height: 3.5rem;
  place-items: center;
  border-radius: 50%;
  color: var(--pl-accent-strong);
  background: var(--pl-accent-soft);
  font-family: Georgia, serif;
  font-size: 1.4rem;
}

.practice-tutor__unavailable p {
  max-width: 24rem;
  margin: 0;
}

.chat-box {
  display: flex;
  min-height: 8rem;
  max-height: 28rem;
  flex-direction: column;
  gap: 0.8rem;
  overflow-y: auto;
  padding: 1.2rem;
}

.chat-message {
  max-width: 88%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--pl-border);
  border-radius: 0.35rem var(--pl-radius-sm) var(--pl-radius-sm) var(--pl-radius-sm);
  color: var(--pl-text-muted);
  background: var(--pl-surface);
}

.chat-message--you {
  align-self: flex-end;
  border-radius: var(--pl-radius-sm) 0.35rem var(--pl-radius-sm) var(--pl-radius-sm);
  background: var(--pl-accent-soft);
}

.chat-message strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--pl-text);
  font-size: 0.74rem;
}

.chat-message p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
  white-space: pre-wrap;
}

.chat-input-container {
  display: block;
  padding: 1.1rem;
  border-top: 1px solid var(--pl-border);
}

.chat-input-container label {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--pl-text);
  font-size: 0.78rem;
  font-weight: 750;
}

.chat-input-container textarea {
  min-height: 6rem;
  border: 2px solid color-mix(in srgb, var(--pl-accent) 48%, var(--pl-border-strong)) !important;
  border-radius: var(--pl-radius-sm);
  outline-offset: 2px !important;
  background: color-mix(in srgb, var(--pl-field) 72%, transparent) !important;
}

.chat-input-container textarea:focus {
  border-color: var(--pl-accent) !important;
}

.chat-input-container__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.8rem;
}

.chat-input-container__footer > span {
  color: var(--pl-text-subtle);
  font-size: 0.7rem;
}

.chat-input-container__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.65rem;
}

.app-body .chat-send-button {
  position: relative;
  width: var(--practice-solution-control-size);
  min-width: var(--practice-solution-control-size);
  height: var(--practice-solution-control-size);
  min-height: var(--practice-solution-control-size);
  padding: 0;
  border-radius: 50%;
  font-size: 1.15rem;
  line-height: 1;
}

.app-body .chat-send-button::before {
  position: absolute;
  inset: -0.25rem;
  content: "";
}

.app-body .voice-button {
  width: var(--practice-solution-control-size);
  min-width: var(--practice-solution-control-size);
  height: var(--practice-solution-control-size);
  min-height: var(--practice-solution-control-size);
  padding: 0;
  border-radius: 50%;
  color: var(--pl-text-muted);
}

.voice-button__indicator {
  position: relative;
  width: 1.3rem;
  height: 1.3rem;
}

.voice-button__icon,
.voice-waveform {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  transition: opacity 140ms ease;
}

.voice-button__icon {
  width: 1.3rem;
  height: 1.3rem;
  fill: none;
  opacity: 1;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.voice-waveform {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  width: 1.25rem;
  height: 1rem;
  opacity: 0;
}

.voice-waveform i {
  --voice-level: 0.34;
  width: 2px;
  height: 100%;
  border-radius: 999px;
  background: currentColor;
  transform: scaleY(var(--voice-level));
  transition: transform 90ms linear;
}

.voice-button--recording {
  border-color: color-mix(in srgb, #c83b4d 72%, var(--pl-border));
  color: #b52d40;
  background: color-mix(in srgb, #c83b4d 12%, var(--pl-surface));
}

.voice-button--recording .voice-button__icon {
  opacity: 0;
}

.voice-button--recording .voice-waveform {
  opacity: 1;
}

.voice-status,
.voice-disclosure {
  margin: 0;
  color: var(--pl-text-subtle);
  font-size: 0.7rem;
  line-height: 1.5;
}

.voice-status:not(:empty) {
  margin-top: 0.8rem;
  color: var(--pl-text-muted);
}

.voice-disclosure {
  /* The old 52rem cap forced an extra desktop wrap despite available space. */
  max-width: none;
  margin-top: 0.55rem;
  text-wrap: pretty;
}

.chat-input-container button[disabled] {
  cursor: wait;
  opacity: 0.65;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .voice-button__icon,
  .voice-waveform,
  .voice-waveform i {
    transition: none;
  }
}

.practice-status-page {
  min-height: 0;
}

.practice-status {
  position: relative;
  display: grid;
  min-height: 0;
  grid-template-columns: auto minmax(0, 1fr);
  align-content: center;
  gap: 1.5rem clamp(1.5rem, 5vw, 3.5rem);
  overflow: hidden;
  padding: 2rem;
  border: 1px solid var(--pl-border);
  border-radius: var(--pl-radius-xl);
  background: var(--pl-surface-raised);
  box-shadow: var(--pl-shadow-soft);
}

.practice-status__symbol {
  display: grid;
  width: 2.75rem;
  height: 2.75rem;
  grid-row: span 2;
  place-items: center;
  border-radius: 50%;
  color: var(--pl-on-accent);
  background: var(--pl-accent);
  font-family: Georgia, serif;
  font-size: 1.3rem;
}

.practice-status__symbol-glyph {
  display: block;
  line-height: 1;
}

.practice-status-page[data-practice-screen="empty"] .practice-status__symbol-glyph {
  transform: translateY(-0.12em);
}

.practice-status__copy {
  position: relative;
  z-index: 1;
  max-width: 52rem;
}

.practice-status__copy h1,
.practice-status__copy h2 {
  margin: 0;
  color: var(--pl-text);
  font-size: var(--pl-heading-size);
  font-weight: 740;
  letter-spacing: -0.025em;
  line-height: 1.3;
}

.practice-status__copy > p:last-child {
  max-width: 42rem;
  margin: 0.5rem 0 0;
  color: var(--pl-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.practice-status__actions {
  position: relative;
  z-index: 1;
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (max-width: 800px) {
  .practice-header {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .practice-header__status {
    justify-content: flex-start;
  }

  .practice-progress {
    grid-column: 1;
  }
}

@media (min-width: 801px) {
  .practice-solution summary {
    padding-right: calc(var(--practice-control-edge) - 0.25rem);
  }
}

@media (max-width: 560px) {
  .practice-page,
  .practice-status-page {
    padding-top: 0;
  }

  .practice-progress {
    grid-template-columns: 1fr;
  }

  .practice-progress span {
    display: none;
  }

  .practice-source {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .chat-input-container__footer {
    align-items: stretch;
    flex-direction: column;
  }

  .chat-input-container__actions {
    width: 100%;
  }

  .chat-input-container__actions .chat-send-button {
    margin-left: auto;
  }

  .chat-input-container__footer > span {
    display: none;
  }

  .practice-status {
    grid-template-columns: 1fr;
  }

  .practice-status__symbol {
    grid-row: auto;
  }

  .practice-status__actions {
    grid-column: 1;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .practice-disclosure__icon,
  .practice-completion__control,
  .practice-question-navigation__control,
  .practice-completion__control::after,
  .practice-question-navigation__control::after {
    transition: none;
  }
}