:root {
  --bg: #f1e4d7;
  --paper: rgba(255, 248, 243, 0.88);
  --ink: #21181b;
  --muted: #5c5562;
  --line: rgba(42, 50, 73, 0.12);
  --accent: #96523d;
  --accent-deep: #6f3228;
  --accent-soft: #d2a16f;
  --navy: #2d3d57;
  --success: #2f6b4f;
  --warning: #9a5a1a;
  --shadow: 0 26px 64px rgba(48, 33, 28, 0.14);
  --radius-lg: 32px;
  --radius-md: 24px;
  --radius-sm: 16px;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(150, 82, 61, 0.22), transparent 32%),
    radial-gradient(circle at top right, rgba(45, 61, 87, 0.18), transparent 30%),
    linear-gradient(180deg, #f8ede4 0%, #efe1d4 100%);
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Avenir Next", "Trebuchet MS", "Gill Sans", sans-serif;
}

button,
select,
audio {
  font: inherit;
}

img {
  max-width: 100%;
}

.app-shell {
  width: min(calc(100% - 16px), var(--max-width));
  margin: 0 auto;
  padding: max(12px, env(safe-area-inset-top)) 0 calc(22px + env(safe-area-inset-bottom));
}

.panel,
.text-panel,
.audio-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.player-shell {
  padding: 16px;
}

.cover-frame {
  width: 84px;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  border-radius: 20px;
  border: 1px solid rgba(42, 50, 73, 0.14);
  background: linear-gradient(180deg, #c8835e 0%, #30405c 100%);
  box-shadow: 0 18px 36px rgba(43, 28, 24, 0.18);
}

.cover-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-strip {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  margin-bottom: 12px;
}

.book-copy {
  min-width: 0;
}

.book-copy h1,
.chapter-header h2,
.text-content h4 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  letter-spacing: 0.01em;
}

.book-copy h1 {
  font-size: clamp(1.75rem, 8.5vw, 2.7rem);
  line-height: 0.95;
  max-width: none;
  margin-top: 4px;
}

.kicker,
.panel-label {
  margin: 0;
  color: var(--navy);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  font-weight: 700;
}

.hero-meta,
.player-state,
.status-note,
.selector-wrap span,
.download-label,
.download-detail {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.hero-meta {
  margin-top: 6px;
  font-size: 0.95rem;
}

.status-note[data-tone="good"] {
  color: var(--success);
}

.status-note[data-tone="warn"] {
  color: var(--warning);
}

.status-note {
  margin-top: 6px;
}

.playback-tools {
  display: flex;
  gap: 10px;
}

.download-panel {
  --download-progress: 0deg;
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: calc(12px + env(safe-area-inset-bottom));
  z-index: 50;
  padding: 16px;
  border-radius: 28px;
  border: 1px solid rgba(42, 50, 73, 0.12);
  background: rgba(255, 249, 245, 0.96);
  box-shadow: 0 28px 64px rgba(34, 23, 27, 0.2);
  backdrop-filter: blur(18px);
  overflow: hidden;
}

.download-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top left, rgba(210, 161, 111, 0.16), transparent 32%),
    linear-gradient(135deg, rgba(150, 82, 61, 0.06), transparent 48%);
  pointer-events: none;
}

.download-panel > * {
  position: relative;
  z-index: 1;
}

.download-panel-topline,
.download-body,
.download-meta {
  display: flex;
}

.download-panel-topline {
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.download-badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(45, 61, 87, 0.08);
  color: var(--navy);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.download-body {
  gap: 14px;
  align-items: center;
  margin-top: 12px;
}

.download-ring {
  flex: 0 0 94px;
  width: 94px;
  height: 94px;
  border-radius: 50%;
  background: conic-gradient(var(--accent) var(--download-progress), rgba(45, 61, 87, 0.1) 0);
  display: grid;
  place-items: center;
  box-shadow: inset 0 0 0 1px rgba(42, 50, 73, 0.08);
}

.download-ring-core {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255, 252, 249, 0.98);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 0 0 1px rgba(42, 50, 73, 0.08);
}

.download-ring-core strong {
  font-size: 1.2rem;
  color: var(--ink);
  line-height: 1;
}

.download-ring-core span {
  margin-top: 4px;
  font-size: 0.66rem;
  color: var(--muted);
  text-align: center;
}

.download-copy {
  min-width: 0;
}

.download-copy h3 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  font-size: 1.2rem;
  color: var(--ink);
}

.download-label {
  margin-top: 6px;
  font-weight: 600;
  color: var(--ink);
}

.download-detail {
  margin-top: 4px;
  font-size: 0.92rem;
}

.download-track {
  height: 9px;
  border-radius: 999px;
  background: rgba(45, 61, 87, 0.08);
  overflow: hidden;
  margin-top: 14px;
}

.download-fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-soft), var(--accent), var(--accent-deep));
  background-size: 200% 100%;
  transition: width 160ms ease;
}

.download-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.download-stat {
  padding: 12px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(42, 50, 73, 0.08);
}

.download-stat-label {
  display: block;
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.download-stat strong {
  display: block;
  margin-top: 6px;
  font-size: 1rem;
  color: var(--ink);
}

.download-panel[data-state="preparing"] .download-badge {
  background: rgba(45, 61, 87, 0.1);
}

.download-panel[data-state="running"] .download-badge {
  background: rgba(150, 82, 61, 0.12);
  color: var(--accent-deep);
}

.download-panel[data-state="running"] .download-ring,
.download-panel[data-state="running"] .download-fill {
  animation: downloadPulse 1.6s ease-in-out infinite;
}

.download-panel[data-state="done"] .download-badge {
  background: rgba(47, 107, 79, 0.12);
  color: var(--success);
}

.download-panel[data-state="done"] .download-ring {
  background: conic-gradient(var(--success) var(--download-progress), rgba(47, 107, 79, 0.12) 0);
}

.download-panel[data-state="error"] .download-badge {
  background: rgba(154, 90, 26, 0.14);
  color: var(--warning);
}

.download-panel[data-state="error"] .download-ring {
  background: conic-gradient(var(--warning) var(--download-progress), rgba(154, 90, 26, 0.12) 0);
}

.hidden {
  display: none !important;
}

.chapter-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.chapter-header h2 {
  font-size: clamp(1.55rem, 7vw, 2.25rem);
  margin-top: 4px;
}

.chapter-side {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.chapter-timing {
  display: flex;
  gap: 8px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.divider {
  opacity: 0.55;
}

.audio-card {
  padding: 14px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

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

.playback-tools {
  flex-wrap: wrap;
  margin-top: 12px;
}

.chapter-toolbar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 12px;
}

.selector-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

select {
  width: 100%;
  padding: 13px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.chapter-nav-buttons,
.utility-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.text-panel {
  margin-top: 14px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.76);
}

.text-panel-heading {
  display: flex;
  justify-content: space-between;
  margin-bottom: 14px;
}

.text-content {
  color: var(--ink);
  line-height: 1.74;
}

.text-content p {
  margin: 0 0 14px;
}

.text-content h4 {
  margin: 0 0 14px;
  font-size: 1.35rem;
}

.primary-button,
.ghost-button {
  border-radius: 999px;
  border: 1px solid transparent;
  min-height: 48px;
  padding: 12px 16px;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #fff7f2;
  box-shadow: 0 16px 30px rgba(111, 50, 40, 0.2);
}

.ghost-button {
  background: rgba(45, 61, 87, 0.06);
  color: var(--navy);
  border-color: rgba(45, 61, 87, 0.12);
}

.small-button {
  min-height: 38px;
  padding: 8px 12px;
}

.active-speed {
  background: rgba(45, 61, 87, 0.16);
  border-color: rgba(45, 61, 87, 0.22);
}

.primary-button:hover,
.ghost-button:hover,
.primary-button:focus-visible,
.ghost-button:focus-visible {
  transform: translateY(-1px);
}

.primary-button:disabled,
.ghost-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
  box-shadow: none;
}

.noscript-banner {
  width: min(calc(100% - 16px), var(--max-width));
  margin: 0 auto 24px;
  padding: 14px 18px;
  border-radius: 18px;
  background: #fff0d8;
  color: #7b4e1d;
  border: 1px solid rgba(123, 78, 29, 0.18);
}

@keyframes downloadPulse {
  0% {
    background-position: 0% 50%;
    transform: translateY(0);
  }
  50% {
    background-position: 100% 50%;
    transform: translateY(-1px);
  }
  100% {
    background-position: 0% 50%;
    transform: translateY(0);
  }
}

@media (min-width: 740px) {
  .app-shell {
    width: min(calc(100% - 32px), var(--max-width));
    padding-top: 24px;
  }

  .download-panel {
    left: auto;
    right: 24px;
    bottom: 24px;
    width: min(460px, calc(100vw - 48px));
  }

  .player-shell {
    padding: 24px;
  }

  .book-strip {
    grid-template-columns: 136px minmax(0, 1fr);
    gap: 20px;
    margin-bottom: 18px;
  }

  .cover-frame {
    width: 136px;
  }

  .book-copy h1 {
    font-size: clamp(2.4rem, 5vw, 4rem);
    max-width: 11ch;
  }

  .chapter-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: end;
  }

  .chapter-side {
    flex-direction: column;
    align-items: flex-end;
  }

  .chapter-toolbar {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .chapter-nav-buttons {
    width: max-content;
    grid-template-columns: repeat(2, auto);
  }

  .utility-row {
    grid-template-columns: repeat(2, auto);
    justify-content: start;
  }
}

@media (max-width: 380px) {
  .book-strip {
    grid-template-columns: 74px minmax(0, 1fr);
  }

  .cover-frame {
    width: 74px;
  }

  .book-copy h1 {
    font-size: clamp(1.7rem, 9vw, 2.2rem);
  }

  .download-body {
    align-items: flex-start;
  }

  .download-ring {
    flex-basis: 84px;
    width: 84px;
    height: 84px;
  }

  .download-ring-core {
    width: 64px;
    height: 64px;
  }

  .download-stats {
    grid-template-columns: 1fr;
  }
}