:root {
  color-scheme: dark;
  --bg: #08120c;
  --panel: #15251b;
  --panel-strong: #1c3425;
  --text: #f4fbf5;
  --muted: #9db0a4;
  --accent: #7ee6a8;
  --accent-strong: #b7f36d;
  --danger: #ff8f8f;
  --border: rgba(255, 255, 255, 0.1);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(126, 230, 168, 0.18), transparent 34rem),
    radial-gradient(circle at top right, rgba(183, 243, 109, 0.14), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

input:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

h1,
h2,
p {
  margin: 0;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 112px;
}

.topbar,
.hero,
.player,
.track-meta,
.section-header,
.processing-header {
  display: flex;
  align-items: center;
}

.topbar {
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  line-height: 1;
  text-transform: uppercase;
  text-shadow: 0 0 18px rgba(126, 230, 168, 0.42);
}

.brand-wave {
  width: 30px;
  height: 18px;
  fill: none;
  stroke: var(--accent-strong);
  stroke-linecap: round;
  stroke-width: 2.5;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.muted {
  color: var(--muted);
  line-height: 1.5;
}

.account-chip,
.secondary-button {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.account-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-radius: 999px;
  padding: 8px 12px 8px 8px;
}

.avatar {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #07111f;
  font-size: 0.8rem;
  font-weight: 800;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.7fr);
  gap: 18px;
  align-items: stretch;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03)), var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  grid-column: 1 / -1;
  justify-content: space-between;
  gap: 24px;
  min-height: 190px;
  padding: 28px;
  background:
    linear-gradient(120deg, rgba(126, 230, 168, 0.2), rgba(183, 243, 109, 0.09)),
    var(--panel-strong);
}

.hero h2 {
  margin-top: 8px;
  font-size: clamp(2rem, 5vw, 4.4rem);
  letter-spacing: -0.04em;
}

.progress-ring {
  display: grid;
  width: 118px;
  height: 118px;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, var(--panel-strong) 0 58%, transparent 59%),
    conic-gradient(var(--accent) 0 0%, rgba(255, 255, 255, 0.14) 0% 100%);
}

.progress-ring span {
  font-size: 1.35rem;
  font-weight: 800;
}

.library,
.upload-panel,
.chapters-panel {
  padding: 22px;
}

.section-header {
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.secondary-button {
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.82rem;
}

.book-list,
.side-stack,
.chapter-list,
.upload-panel {
  display: grid;
  gap: 12px;
}

.book-card {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  width: 100%;
  padding: 14px;
  border: 1px solid transparent;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  color: inherit;
}

.book-card:hover,
.book-card.active {
  border-color: rgba(126, 230, 168, 0.55);
  background: rgba(126, 230, 168, 0.08);
}

.book-select {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  flex: 1;
  min-width: 0;
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  appearance: none;
}

.book-actions {
  display: flex;
  flex: none;
  gap: 6px;
  margin-left: auto;
}

.delete-book-button,
.retry-book-button {
  flex: none;
  border: 1px solid rgba(255, 143, 143, 0.24);
  border-radius: 999px;
  padding: 7px 10px;
  background: rgba(255, 143, 143, 0.1);
  color: var(--danger);
  font-size: 0.72rem;
  font-weight: 800;
  appearance: none;
}

.delete-book-button:hover {
  background: rgba(255, 143, 143, 0.18);
}

.retry-book-button {
  border-color: rgba(126, 230, 168, 0.24);
  background: rgba(126, 230, 168, 0.1);
  color: var(--accent);
}

.retry-book-button:hover {
  background: rgba(126, 230, 168, 0.18);
}

.book-cover,
.cover-mini {
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
}

.book-cover {
  height: 74px;
}

.book-card h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.book-status,
.book-progress {
  min-width: 78px;
  text-align: right;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 8px;
  background: rgba(126, 230, 168, 0.1);
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
}

.status-pill.failed {
  background: rgba(255, 143, 143, 0.12);
  color: var(--danger);
}

.status-pill.unavailable {
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
}

.upload-dropzone {
  display: grid;
  min-height: 118px;
  place-items: center;
  border: 1px dashed rgba(126, 230, 168, 0.55);
  border-radius: 20px;
  background: rgba(126, 230, 168, 0.06);
  color: var(--accent);
  font-weight: 700;
  cursor: pointer;
}

.upload-dropzone.dragging {
  border-color: var(--accent-strong);
  background: rgba(126, 230, 168, 0.12);
}

.upload-dropzone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.processing-card,
.empty-state {
  display: grid;
  gap: 8px;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.05);
}

.hidden {
  display: none;
}

.processing-header {
  justify-content: space-between;
  font-weight: 700;
}

.bar {
  overflow: hidden;
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
}

.bar span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 250ms ease;
}

.chapter-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.chapter-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
}

.chapter-item.current {
  background: rgba(118, 224, 166, 0.1);
  outline: 1px solid rgba(118, 224, 166, 0.35);
}

.chapter-item strong,
.chapter-item span {
  font-size: 0.9rem;
}

.player {
  position: fixed;
  right: max(16px, calc((100vw - 1180px) / 2));
  bottom: 18px;
  left: max(16px, calc((100vw - 1180px) / 2));
  justify-content: space-between;
  gap: 18px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(20, 26, 41, 0.92);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.track-meta {
  min-width: 220px;
  gap: 12px;
}

.track-meta span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.cover-mini {
  width: 44px;
  height: 44px;
  flex: none;
}

.player-controls {
  display: flex;
  gap: 10px;
  align-items: center;
}

.player-controls button {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.player-controls svg {
  width: 36px;
  height: 36px;
}

.skip-button svg {
  fill: currentcolor;
}

.skip-triangle {
  transform: translateY(-4px);
}

.skip-button text {
  fill: currentcolor;
  stroke: none;
  font-size: 10px;
  font-weight: 900;
  text-anchor: middle;
}

.play-button {
  width: 76px !important;
  background: var(--text) !important;
  color: #0c1220 !important;
}

.play-button svg {
  fill: currentcolor;
  width: 32px;
  height: 32px;
}

.pause-icon,
.play-button.is-playing .play-icon {
  display: none;
}

.play-button.is-playing .pause-icon {
  display: block;
}

.timeline {
  display: grid;
  grid-template-columns: auto minmax(160px, 280px) auto;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.82rem;
}

.timeline input {
  accent-color: var(--accent);
}

@media (max-width: 820px) {
  .app-shell {
    width: min(100% - 24px, 720px);
    padding-bottom: 190px;
  }

  .topbar,
  .hero,
  .player {
    align-items: flex-start;
    flex-direction: column;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .progress-ring {
    width: 86px;
    height: 86px;
  }

  .player-controls,
  .timeline {
    width: 100%;
  }

  .player-controls {
    justify-content: center;
  }

  .timeline {
    grid-template-columns: auto 1fr auto;
  }
}

@media (max-width: 560px) {
  .book-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

.auth-overlay.hidden {
  display: none;
}

.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(8, 18, 12, 0.88);
  backdrop-filter: blur(6px);
}

.auth-card {
  display: grid;
  gap: 14px;
  width: min(360px, 100%);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.auth-card input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-strong);
  color: var(--text);
}

.auth-card .secondary-button {
  justify-self: center;
  padding-inline: 28px;
}

.auth-error {
  color: var(--danger);
  text-align: center;
}