:root {
  --u6a-navy: #071f4f;
  --u6a-green: #17785f;
  --u6a-green-dark: #0c5d49;
  --u6a-red: #be3144;
  --u6a-gold: #d9a441;
  --u6a-ink: #182235;
  --u6a-muted: #526176;
  --u6a-paper: #ffffff;
  --u6a-soft: #f3f8f5;
  --u6a-blue-soft: #edf3fc;
  --u6a-border: #d8e4e0;
  --u6a-shadow: 0 16px 38px rgba(7, 31, 79, 0.12);
}

* {
  box-sizing: border-box;
}

body.unit6-audiobook-page {
  overflow-x: hidden;
  background: #f4f7fb;
  color: var(--u6a-ink);
}

.u6a-hero {
  min-height: clamp(500px, 76vh, 720px);
  display: grid;
  align-items: end;
  width: 100%;
  padding: 5.5rem 1.25rem 2.3rem;
  color: #fff;
  background:
    linear-gradient(115deg, rgba(7, 31, 79, 0.96) 0%, rgba(7, 31, 79, 0.8) 48%, rgba(23, 120, 95, 0.28) 100%),
    url("../img/english-intermediate/unit-6/audiobook-little-red-riding-hood/little-red-the-plan-v1.webp") center / cover no-repeat;
}

.u6a-hero-content,
.u6a-shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.u6a-hero-content {
  width: min(1180px, 100%);
}

.u6a-hero .eyebrow,
.kicker {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 0.85rem;
  border-radius: 999px;
  padding: 0.42rem 0.76rem;
  background: rgba(255, 255, 255, 0.94);
  color: var(--u6a-navy);
  font-weight: 950;
  letter-spacing: 0;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.u6a-hero h1 {
  max-width: 850px;
  margin: 0 0 1rem;
  font-size: clamp(2.25rem, 6vw, 4.8rem);
  line-height: 1;
  letter-spacing: 0;
}

.u6a-hero p:not(.eyebrow) {
  max-width: 760px;
  margin: 0;
  color: #f8fbff;
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.58;
}

.u6a-meta,
.u6a-actions,
.audio-speed-strip,
.scene-nav,
.language-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}

.u6a-meta {
  margin: 1.25rem 0;
}

.u6a-meta span,
.language-chip-row span {
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
  padding: 0.45rem 0.7rem;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-weight: 850;
  line-height: 1.15;
}

.u6a-shell {
  padding: 2rem 0 4rem;
}

.u6a-panel,
.scene-card,
.language-card,
.common-error-card {
  border: 1px solid var(--u6a-border);
  border-radius: 8px;
  background: var(--u6a-paper);
  box-shadow: var(--u6a-shadow);
}

.u6a-panel {
  overflow: hidden;
  margin-bottom: 1.25rem;
}

.u6a-panel-head {
  padding: 1.25rem;
  border-bottom: 1px solid var(--u6a-border);
  background: linear-gradient(135deg, #ffffff, #eef8f5);
}

.u6a-panel-head h2,
.scene-copy h2,
.language-card h3,
.common-error-card h3 {
  margin: 0;
  color: var(--u6a-navy);
  line-height: 1.08;
  letter-spacing: 0;
}

.u6a-panel-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
}

.u6a-panel-head p,
.scene-copy p,
.language-card p,
.common-error-card p {
  color: var(--u6a-muted);
  line-height: 1.6;
}

.u6a-panel-body {
  padding: 1.25rem;
}

.main-audio-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem;
  border: 1px solid #cfe1dc;
  border-radius: 8px;
  background: #f8fcfb;
}

.main-audio-card audio,
.scene-audio audio {
  width: 100%;
}

.audio-speed-strip {
  justify-content: space-between;
  padding: 0.85rem;
  border-radius: 8px;
  background: var(--u6a-navy);
  color: #fff;
}

.audio-speed-strip strong {
  font-size: 0.95rem;
}

.audio-speed-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.audio-speed-buttons button,
.scene-nav button {
  border: 0;
  border-radius: 999px;
  min-height: 42px;
  padding: 0.55rem 0.85rem;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.audio-speed-buttons button {
  background: rgba(255, 255, 255, 0.13);
  color: #fff;
}

.audio-speed-buttons button.is-active {
  background: #fff;
  color: var(--u6a-navy);
}

.audio-speed-buttons button:active,
.scene-nav button:active {
  transform: translateY(1px);
}

.scene-nav {
  margin-top: 1rem;
}

.scene-nav button {
  border: 1px solid #cfe1dc;
  background: #fff;
  color: var(--u6a-navy);
}

.scene-nav button:hover,
.scene-nav button:focus-visible {
  background: var(--u6a-blue-soft);
}

.audiobook-status {
  min-height: 1.45rem;
  margin: 0.75rem 0 0;
  color: var(--u6a-green-dark);
  font-weight: 800;
}

.scene-list {
  display: grid;
  gap: 1.25rem;
}

.scene-card {
  display: grid;
  grid-template-columns: minmax(280px, 42%) minmax(0, 1fr);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.scene-card.is-highlighted {
  border-color: var(--u6a-gold);
  box-shadow: 0 0 0 4px rgba(217, 164, 65, 0.22), var(--u6a-shadow);
}

.scene-media {
  min-height: 100%;
  background: #dfe8e5;
}

.scene-media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
}

.scene-copy {
  padding: 1.25rem;
}

.scene-copy h2 {
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.scene-label {
  display: inline-flex;
  width: fit-content;
  margin-bottom: 0.7rem;
  border-radius: 999px;
  padding: 0.4rem 0.7rem;
  background: var(--u6a-blue-soft);
  color: var(--u6a-navy);
  font-weight: 950;
  text-transform: uppercase;
  font-size: 0.76rem;
}

.scene-audio {
  margin: 1rem 0;
  padding: 0.85rem;
  border: 1px solid #cfe1dc;
  border-radius: 8px;
  background: #f8fcfb;
}

.scene-audio strong {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--u6a-navy);
}

.transcript {
  display: grid;
  gap: 0.75rem;
}

.transcript p {
  margin: 0;
  font-size: 1.02rem;
}

.language-grid,
.common-error-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.language-card,
.common-error-card {
  padding: 1rem;
  box-shadow: none;
}

.language-card h3,
.common-error-card h3 {
  font-size: 1.15rem;
}

.language-card blockquote {
  margin: 0.8rem 0 0;
  padding: 0.85rem;
  border-left: 4px solid var(--u6a-green);
  border-radius: 8px;
  background: var(--u6a-soft);
  color: var(--u6a-ink);
  line-height: 1.55;
}

.common-error-card .wrong,
.common-error-card .right {
  display: block;
  margin-top: 0.7rem;
  padding: 0.75rem;
  border-radius: 8px;
  line-height: 1.5;
}

.common-error-card .wrong {
  background: #fff1ef;
  color: #8f252c;
}

.common-error-card .right {
  background: #eef8f5;
  color: #0c5d49;
}

.language-chip-row {
  margin-top: 1rem;
}

.language-chip-row span {
  border-color: #cfe1dc;
  background: #fff;
  color: var(--u6a-navy);
}

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

  .scene-media img {
    min-height: 300px;
    aspect-ratio: 16 / 9;
  }

  .language-grid,
  .common-error-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .u6a-hero {
    min-height: 560px;
    padding: 5rem 1rem 1.8rem;
    background-position: center;
  }

  .u6a-hero-content,
  .u6a-shell {
    width: min(100% - 1rem, 1180px);
  }

  .u6a-actions .btn,
  .audio-speed-buttons button,
  .scene-nav button {
    width: 100%;
    justify-content: center;
  }

  .audio-speed-strip {
    align-items: stretch;
  }

  .audio-speed-buttons {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .audio-speed-buttons button {
    width: auto;
    padding-left: 0.45rem;
    padding-right: 0.45rem;
  }

  .scene-copy,
  .u6a-panel-head,
  .u6a-panel-body {
    padding: 1rem;
  }

  .scene-media img {
    min-height: 230px;
  }
}