:root {
  color-scheme: light;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --panel-soft: #eef5f1;
  --panel-muted: #d7ddd9;
  --panel-hover: #dfeee9;
  --ink: #202225;
  --muted: #687078;
  --line: #d9ded7;
  --teal: #1d7f79;
  --teal-dark: #125955;
  --rust: #a2462f;
  --gold: #c69a38;
  --focus: #0d9488;
  --on-teal: #ffffff;
  --warning-bg: #fff9ea;
  --danger-bg: #fff2ed;
  --segment-bg: rgba(255, 255, 255, 0.72);
  --segment-hover: #ffffff;
  --segment-current: #ffffff;
  --segment-load-empty: #b9c3bd;
  --player-bg: rgba(255, 255, 255, 0.96);
  --shadow: 0 16px 40px rgba(28, 35, 39, 0.13);
  --player-shadow: 0 -16px 36px rgba(28, 35, 39, 0.12);
  --segment-current-shadow: 0 8px 24px rgba(29, 127, 121, 0.1);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #151515;
    --panel: #20211f;
    --panel-soft: #17211d;
    --panel-muted: #303631;
    --panel-hover: #243730;
    --ink: #f0eee7;
    --muted: #aeb4aa;
    --line: #343a35;
    --teal: #2ec4b6;
    --teal-dark: #86e2d7;
    --rust: #e28a6b;
    --gold: #d8ac4c;
    --focus: #3ed4c8;
    --on-teal: #06211f;
    --warning-bg: #2c2618;
    --danger-bg: #321f1a;
    --segment-bg: rgba(36, 37, 34, 0.78);
    --segment-hover: #292b27;
    --segment-current: #2c2e2a;
    --segment-load-empty: #59635c;
    --player-bg: rgba(24, 25, 23, 0.96);
    --shadow: 0 16px 42px rgba(0, 0, 0, 0.45);
    --player-shadow: 0 -16px 38px rgba(0, 0, 0, 0.42);
    --segment-current-shadow: 0 8px 26px rgba(46, 196, 182, 0.16);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
}

button,
input,
select {
  font: inherit;
}

button {
  touch-action: manipulation;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  min-height: 100vh;
  padding-bottom: 112px;
}

.library {
  border-right: 1px solid var(--line);
  background: var(--panel-soft);
  min-height: 100vh;
  padding: 18px;
  position: sticky;
  top: 0;
  align-self: start;
  max-height: 100vh;
  overflow: auto;
}

.cover-row {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  align-items: center;
}

.cover {
  width: 92px;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 6px;
  box-shadow: var(--shadow);
  background: var(--panel-muted);
}

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

.eyebrow {
  margin: 0 0 6px;
  color: var(--rust);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 1.16rem;
  line-height: 1.18;
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.45rem);
  line-height: 1.08;
  max-width: 900px;
}

.connection {
  min-height: 1.2em;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.87rem;
}

.chapter-tools {
  display: grid;
  gap: 8px;
  margin: 18px 0 12px;
}

.chapter-tools select,
.chapter-tools input {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
  padding: 0 12px;
}

.chapter-list {
  display: grid;
  gap: 4px;
}

.chapter-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  align-items: center;
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  padding: 6px 8px;
  cursor: pointer;
}

.chapter-item:hover,
.chapter-item.current {
  background: var(--panel-hover);
}

.chapter-num {
  color: var(--teal-dark);
  font-weight: 800;
  font-size: 0.82rem;
}

.chapter-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.reader {
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
  padding: 30px clamp(18px, 5vw, 54px) 26px;
}

.reader-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.reader-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: flex-start;
  gap: 12px;
}

.audiobook-downloads {
  display: grid;
  gap: 5px;
}

.audiobook-downloads[hidden] {
  display: none;
}

.spend-indicator {
  display: grid;
  grid-template-columns: auto auto;
  column-gap: 8px;
  row-gap: 1px;
  align-items: center;
  min-width: 138px;
  min-height: 44px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--ink);
}

.spend-indicator svg {
  grid-row: 1 / 3;
  width: 19px;
  height: 19px;
  color: var(--teal-dark);
  stroke-width: 2.4;
}

.spend-copy {
  display: flex;
  gap: 6px;
  align-items: baseline;
  min-width: 0;
}

.spend-label {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.spend-amount {
  font-size: 0.96rem;
  font-weight: 900;
}

.spend-meta {
  grid-column: 2;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.15;
  white-space: nowrap;
}

.spend-indicator.is-warning {
  border-color: color-mix(in srgb, var(--gold) 70%, var(--line));
  background: var(--warning-bg);
}

.spend-indicator.is-danger {
  border-color: color-mix(in srgb, var(--rust) 72%, var(--line));
  background: var(--danger-bg);
}

.source-link {
  color: var(--teal-dark);
  font-weight: 800;
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding: 5px 0;
}

.install-button {
  width: 42px;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--teal-dark);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.install-button[hidden] {
  display: none;
}

.install-button svg {
  width: 19px;
  height: 19px;
  stroke-width: 2.4;
}

.chapter-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  margin: 18px 0 8px;
}

.chapter-stats {
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.text-button,
.icon-button,
.play-button {
  border: 1px solid var(--line);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
}

.text-button {
  gap: 8px;
  min-height: 40px;
  border-radius: 6px;
  background: var(--panel);
  padding: 0 12px;
  font-weight: 800;
}

.text-button:last-child {
  justify-self: end;
}

.text-button:disabled,
.icon-button:disabled,
.play-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.segments {
  display: grid;
  gap: 10px;
  padding-top: 6px;
}

.segment {
  border-left: 4px solid transparent;
  background: var(--segment-bg);
  border-radius: 6px;
  padding: 12px 14px 12px 16px;
  line-height: 1.65;
  font-size: 1.05rem;
  cursor: pointer;
  white-space: pre-line;
}

.segment:hover {
  background: var(--segment-hover);
}

.segment.current {
  border-left-color: var(--teal);
  background: var(--segment-current);
  box-shadow: var(--segment-current-shadow);
}

.segment-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.segment-index {
  color: var(--rust);
  font-size: 0.76rem;
  font-weight: 800;
}

.segment-load {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border: 2px solid var(--segment-load-empty);
  border-radius: 999px;
}

.segment-load.is-loading {
  border-color: color-mix(in srgb, var(--gold) 55%, var(--panel));
  border-top-color: var(--gold);
  animation: load-spin 0.9s linear infinite;
}

.segment-load.is-loaded {
  border-color: var(--teal);
  background: var(--teal);
}

.segment-load.is-loaded::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid var(--on-teal);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.segment-text {
  display: block;
}

@keyframes load-spin {
  to {
    transform: rotate(360deg);
  }
}

.player {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 96px;
  padding: 14px clamp(14px, 4vw, 28px);
  border-top: 1px solid var(--line);
  background: var(--player-bg);
  box-shadow: var(--player-shadow);
  backdrop-filter: blur(12px);
}

.player-main {
  display: grid;
  grid-template-columns: 44px 44px 58px 44px 44px;
  gap: 8px;
  align-items: center;
}

.icon-button,
.play-button {
  aspect-ratio: 1;
  border-radius: 999px;
  background: var(--panel);
}

.play-button {
  width: 58px;
  background: var(--teal);
  color: var(--on-teal);
  border-color: var(--teal);
}

.icon-button {
  width: 44px;
}

.icon-button svg,
.play-button svg,
.text-button svg,
.speed svg {
  width: 20px;
  height: 20px;
  stroke-width: 2.4;
}

.player-progress {
  min-width: 0;
}

.now-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 8px;
}

#now-label {
  color: var(--ink);
  font-weight: 800;
}

#status {
  min-width: 70px;
  text-align: right;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--teal);
}

.player-options {
  display: flex;
  align-items: center;
  gap: 14px;
}

.speed,
.auto-next {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-weight: 800;
  white-space: nowrap;
}

.speed input {
  width: 104px;
}

.auto-next input {
  width: 18px;
  height: 18px;
  accent-color: var(--teal);
}

.report-issue {
  width: 38px;
  flex: 0 0 38px;
  color: var(--muted);
}

.report-issue.is-sent {
  color: var(--teal-dark);
  border-color: color-mix(in srgb, var(--teal) 45%, var(--line));
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 45%, transparent);
  outline-offset: 2px;
}

@media (max-width: 820px) {
  .app-shell {
    display: block;
    padding-bottom: 172px;
  }

  .library {
    position: static;
    min-height: 0;
    max-height: none;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .cover-row {
    grid-template-columns: 68px 1fr;
  }

  .cover {
    width: 68px;
  }

  .chapter-list {
    max-height: 190px;
    overflow: auto;
    border-top: 1px solid var(--line);
    padding-top: 8px;
  }

  .reader {
    padding: 22px 16px 20px;
  }

  .reader-header {
    display: grid;
  }

  .reader-actions {
    justify-self: start;
    flex-wrap: wrap;
  }

  .chapter-nav {
    grid-template-columns: 1fr 1fr;
  }

  .chapter-stats {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .segment {
    font-size: 1rem;
    line-height: 1.6;
    padding: 12px 12px 12px 14px;
  }

  .player {
    grid-template-columns: 1fr;
    gap: 10px;
    min-height: 154px;
  }

  .player-main {
    justify-self: center;
  }

  .player-options {
    justify-content: space-between;
  }
}

@media (max-width: 420px) {
  h1 {
    font-size: 1rem;
  }

  h2 {
    font-size: 1.45rem;
  }

  .chapter-item {
    grid-template-columns: 38px 1fr;
  }

  .speed input {
    width: 82px;
  }
}