/* M6 lesson detail styles split from assets/styles.css during Task 12. */

.lesson-section {
  position: relative;
  display: grid;
  grid-template-columns: minmax(250px, 330px) minmax(0, 1fr);
  gap: 54px;
  align-items: start;
  min-width: 0;
}

.lesson-module-note {
  position: absolute;
  z-index: 4;
  top: -134px;
  left: 4px;
  width: 286px;
  height: 126px;
  pointer-events: none;
}

.lesson-module-caption {
  top: 0;
  left: 0;
  font-size: 24px;
  transform: rotate(-5deg);
}

.lesson-module-arrow {
  top: 22px;
  left: 102px;
  width: 148px;
  height: 96px;
  transform: rotate(4deg);
}

.lesson-card {
  position: relative;
  grid-column: 2;
  min-width: 0;
  max-width: 100%;
  animation: cardPeelIn 560ms ease both;
}

.lesson-cover {
  position: relative;
  min-width: 0;
  min-height: 310px;
  display: grid;
  align-content: space-between;
  gap: 18px;
  padding: 32px;
  background: var(--color-dew-drop);
}

.lesson-cover h3 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: 46px;
  overflow-wrap: anywhere;
}

.lesson-cover p {
  margin-bottom: 0;
}

.lesson-fields {
  max-width: 680px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lesson-tabs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1.5px solid var(--color-charcoal);
  border-bottom: 1.5px solid var(--color-charcoal);
}

.lesson-tabs button {
  min-height: 56px;
  border: 0;
  border-right: 1.5px solid var(--color-charcoal);
  background: var(--color-cream-paper);
  color: var(--color-charcoal);
  font-size: 18px;
  font-weight: 600;
}

.lesson-tabs button:last-child {
  border-right: 0;
}

.lesson-tabs button:hover,
.lesson-tabs button.is-active {
  color: var(--color-marker-orange);
}

.lesson-pane {
  min-width: 0;
  max-width: 100%;
  padding: 28px 32px 34px;
  background: var(--color-cream-paper);
  animation: cardPeelIn 260ms ease both;
}

.practice-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}

.practice-steps div,
.resource-note,
.evidence-tags div {
  padding: 18px;
  border: 1.5px solid var(--color-charcoal);
  border-radius: 12px;
  background: var(--color-dew-drop);
}

.practice-steps div {
  min-height: 128px;
}

.practice-steps span,
.resource-note span,
.evidence-tags span {
  display: block;
  margin-bottom: 10px;
  color: var(--color-marker-orange);
  font-family: var(--font-geist);
  font-size: 14px;
  font-weight: 500;
}

.practice-steps strong {
  color: var(--color-cocoa-ink);
  font-size: 20px;
  line-height: 1.3;
}

.lesson-list {
  display: grid;
  grid-template-columns: 100px minmax(0, 1fr);
  gap: 14px 24px;
  margin: 0;
}

.lesson-list dt {
  color: var(--color-cocoa-ink);
  font-size: 18px;
  font-weight: 600;
}

.lesson-list dd {
  margin: 0;
  color: var(--color-cocoa-ink);
  font-size: 18px;
  line-height: 1.55;
}

.resource-note {
  min-height: 160px;
  display: grid;
  align-content: center;
  gap: 8px;
}

.resource-note strong {
  color: var(--color-cocoa-ink);
  font-size: 28px;
}

.resource-note small {
  color: var(--color-cocoa-ink);
  font-size: 18px;
  line-height: 1.4;
}

.audio-item {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1.5px solid var(--color-charcoal);
  border-radius: 12px;
}

.audio-item audio {
  width: 100%;
}

.audio-workbench {
  display: grid;
  gap: 16px;
  min-width: 0;
  max-width: 100%;
}

.audio-version-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 12px;
  align-items: end;
  padding: 8px 8px 0;
  margin-bottom: 10px;
  color: rgba(239, 255, 251, 0.9);
  font-family: var(--font-geist);
}

.audio-version-head span {
  grid-column: 1 / -1;
  color: rgba(202, 229, 224, 0.72);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.audio-version-head strong,
.audio-version-head em {
  min-width: 0;
  font-style: normal;
  font-weight: 850;
  line-height: 1.1;
}

.audio-version-head strong {
  overflow: hidden;
  font-size: 17px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.audio-version-selector {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 0 8px 12px;
}

.audio-version-button {
  min-width: 0;
  min-height: 72px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 10px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid rgba(184, 245, 230, 0.22);
  border-radius: 12px;
  background:
    linear-gradient(180deg, rgba(28, 54, 58, 0.94), rgba(8, 20, 24, 0.96));
  color: rgba(239, 255, 251, 0.92);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.07),
    rgba(0, 0, 0, 0.22) 0 8px 18px;
  text-align: left;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease, background 160ms ease;
}

.audio-player-frame .audio-version-selector + audio-speed-player {
  margin-top: 0;
}

.audio-version-button:hover,
.audio-version-button:focus-visible,
.audio-version-button.is-active {
  border-color: rgba(54, 240, 178, 0.82);
  outline: none;
}

.audio-version-button:hover {
  background:
    linear-gradient(135deg, rgba(49, 214, 255, 0.16), rgba(54, 240, 178, 0.08)),
    linear-gradient(180deg, rgba(30, 65, 68, 0.98), rgba(8, 20, 24, 0.98));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.09),
    rgba(54, 240, 178, 0.16) 0 10px 24px;
  transform: translateY(-1px);
}

.audio-version-button span {
  grid-row: 1 / 3;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  font-family: var(--font-geist);
  font-size: 13px;
  font-weight: 800;
  color: rgba(239, 255, 251, 0.86);
  background: rgba(255, 255, 255, 0.04);
}

.audio-version-button strong,
.audio-version-button small {
  min-width: 0;
  overflow: hidden;
  font-family: var(--font-geist);
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.audio-version-button strong {
  font-size: 15px;
  font-weight: 800;
}

.audio-version-button small {
  color: rgba(202, 229, 224, 0.76);
  font-size: 12px;
}

.audio-version-button.is-active {
  background:
    linear-gradient(135deg, rgba(49, 214, 255, 0.28), rgba(54, 240, 178, 0.14) 46%, rgba(255, 107, 92, 0.13)),
    linear-gradient(180deg, rgba(22, 63, 66, 0.98), rgba(7, 20, 24, 0.98));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    rgba(49, 214, 255, 0.18) 0 12px 30px;
}

.audio-version-button.is-active span,
.audio-version-button.is-active strong {
  color: #effffb;
}

.audio-version-button.is-active span {
  border-color: rgba(54, 240, 178, 0.96);
  background: linear-gradient(135deg, #36f0b2, #31d6ff);
  color: #062125;
  box-shadow: 0 0 18px rgba(49, 214, 255, 0.28);
}

@media (max-width: 560px) {
  .lesson-audio-pane {
    padding: 18px 14px 22px;
  }

  .audio-version-head {
    grid-template-columns: minmax(0, 1fr);
  }

  .audio-player-frame {
    padding: 10px;
    border-radius: 12px;
  }

  .audio-version-selector {
    grid-template-columns: minmax(0, 1fr);
  }

  .audio-version-button {
    min-height: 58px;
    grid-template-columns: auto minmax(0, 1fr);
  }

  .audio-version-button span {
    grid-row: auto;
  }

  .audio-version-button small {
    grid-column: 2;
    justify-self: start;
  }
}

.audio-workbench audio-speed-player {
  display: block;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  --asp-radius: 8px;
}

.audio-player-frame {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  padding: 12px;
  border: 1px solid rgba(211, 255, 243, 0.18);
  border-radius: 14px;
  background:
    radial-gradient(circle at 18% 12%, rgba(49, 214, 255, 0.14), transparent 32%),
    radial-gradient(circle at 86% 8%, rgba(54, 240, 178, 0.12), transparent 30%),
    linear-gradient(180deg, rgba(10, 24, 30, 0.98), rgba(5, 13, 17, 0.99));
  box-shadow:
    rgba(0, 17, 24, 0.26) 0 18px 44px,
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.lesson-metronome-pane {
  padding: 18px;
}

.lesson-metronome-pane.is-hidden {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  width: 100%;
  max-width: none;
  animation: none;
  opacity: 0.01;
  pointer-events: none;
}

.metronome-slot {
  min-height: var(--metronome-slot-height, 680px);
}

.metronome-dock {
  position: absolute;
  z-index: 40;
  max-width: none;
}

.metronome-dock.is-active {
  opacity: 1;
  pointer-events: auto;
}

.metronome-dock.is-parked {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 0;
  width: 64px;
  height: 64px;
  overflow: hidden;
  opacity: 0.001;
  pointer-events: none;
  transform: translateZ(0);
}

.metronome-workbench {
  display: grid;
  gap: 16px;
}

.metronome-brief {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  padding: 0 6px;
}

.metronome-brief span {
  display: block;
  margin-bottom: 4px;
  color: var(--color-marker-orange);
  font-family: var(--font-geist);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.metronome-brief strong {
  display: block;
  color: var(--color-cocoa-ink);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
}

.metronome-brief small {
  max-width: 260px;
  color: rgba(43, 26, 7, 0.72);
  font-family: var(--font-geist);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
  text-align: right;
}

.metronome-embed-shell {
  overflow: hidden;
  border-radius: 12px;
  background: #101012;
  box-shadow:
    rgba(22, 12, 4, 0.16) 0 14px 34px,
    rgba(255, 96, 31, 0.08) 0 1px 0 inset;
}

.metronome-embed-shell.is-desktop-scaled {
  height: var(--metronome-scaled-height, 625px);
}

.metronome-frame {
  display: block;
  width: 100%;
  height: 1640px;
  min-height: 1640px;
  border: 0;
  background: #101012;
}

.metronome-embed-shell.is-desktop-scaled .metronome-frame {
  width: 860px;
  max-width: none;
  height: var(--metronome-frame-height, 1640px);
  min-height: var(--metronome-frame-height, 1640px);
  transform: scale(var(--metronome-frame-scale, 1));
  transform-origin: left top;
}

.score-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.score-card {
  margin: 0;
  border: 1.5px solid var(--color-charcoal);
  border-radius: 12px;
  overflow: hidden;
  background: var(--color-dew-drop);
}

.score-sheet {
  box-shadow: rgba(0, 0, 0, 0.08) 0 16px 36px;
}

.score-image-frame {
  max-height: min(74vh, 920px);
  padding: 14px;
  overflow: auto;
  background: #ffffff;
}

.score-card img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid rgba(43, 26, 7, 0.14);
  background: #ffffff;
  filter: none;
}

.evidence-tags {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.evidence-tags strong {
  display: block;
  color: var(--color-cocoa-ink);
  font-size: 24px;
  line-height: 1.2;
}

.evidence-tags small {
  display: block;
  margin-top: 8px;
  color: var(--color-cocoa-ink);
  font-size: 16px;
  line-height: 1.4;
}