/* tokens */
.reader-app {
  --reader-player-height: 8.25rem;
  --player-bg: color-mix(in srgb, var(--bg) 70%, #0a0d18);
  --player-bg-strong: color-mix(in srgb, var(--bg) 56%, #06080f);
  --player-fg: color-mix(in srgb, var(--text) 90%, #f5f7ff);
  --player-muted: color-mix(in srgb, var(--muted) 70%, #d0d8ff);
  --player-border: color-mix(in srgb, var(--border) 62%, #5f73ff);
  --player-accent: color-mix(in srgb, var(--link) 75%, #7f8dff);
  --player-shadow: 0 -10px 26px rgba(6, 10, 24, 0.35);
}

/* Light mode override: cleaner neutral player palette. */
html[data-theme="light"] .reader-app {
  --player-bg: #d8e0ea;
  --player-bg-strong: #c6d2df;
  --player-fg: #0f172a;
  --player-muted: #4f627c;
  --player-border: #aebed0;
  --player-accent: #2563eb;
  --player-shadow: 0 -10px 24px rgba(15, 23, 42, 0.14);
}

.reader-main[data-reader-region="main"] {
  padding-bottom: calc(1rem + var(--reader-player-height) + env(safe-area-inset-bottom));
}

.reader-app[data-reader-has-player="false"] .reader-main[data-reader-region="main"] {
  padding-bottom: calc(1rem + env(safe-area-inset-bottom));
}

/* dock shell */
.reader-controls[data-reader-region="controls"] {
  position: fixed;
  left: 0.75rem;
  right: 0.75rem;
  bottom: calc(0.6rem + env(safe-area-inset-bottom));
  z-index: 40;
  display: grid;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  border: none;
  border-radius: 1rem;
  background:
    linear-gradient(
      to bottom,
      color-mix(in srgb, var(--player-bg) 80%, #ffffff 4%),
      var(--player-bg-strong)
    );
  box-shadow:
    0 16px 28px rgba(5, 8, 20, 0.45),
    0 2px 8px rgba(5, 8, 20, 0.25);
  backdrop-filter: blur(8px);
}

html[data-theme="light"] .reader-controls[data-reader-region="controls"] {
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--player-bg) 98%, #ffffff 2%),
    var(--player-bg-strong)
  );
  border: 1px solid color-mix(in srgb, var(--player-border) 92%, #ffffff 8%);
  box-shadow:
    0 14px 26px rgba(15, 23, 42, 0.2),
    inset 0 1px 0 color-mix(in srgb, #ffffff 44%, transparent);
  backdrop-filter: blur(12px) saturate(140%);
}

.reader-controls .reader-pager {
  margin: 0;
  justify-self: center;
  font-size: 0.9rem;
}

.reader-controls .reader-pager a {
  color: var(--player-fg);
}

/* player layout */
.reader-player[data-reader-player="root"] {
  width: min(42rem, 100%);
  margin: 0 auto;
  display: grid;
  gap: 0.4rem;
  color: var(--player-fg);
}

.reader-player-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* 1fr | transport | 1fr keeps prev/play/next centered in the full bar width. */
.reader-player-row--transport {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

.reader-player-transport-spacer {
  min-width: 0;
}

.reader-player-row--transport > .reader-player-group--transport {
  justify-self: center;
}

.reader-player-row--transport > .reader-player-group--utility {
  justify-self: end;
}

.reader-player-row--timeline {
  justify-content: space-between;
}

.reader-player-row--meta {
  min-height: 1.1rem;
}

.reader-player-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  min-width: 0;
}

.reader-player-group--right {
  flex: 0 0 auto;
}

.reader-player-group--transport {
  gap: 0.6rem;
}

.reader-player-group--utility {
  position: relative;
  gap: 0.35rem;
}

.reader-player-group--center {
  flex: 1 1 auto;
}

/* controls */
.reader-player-time {
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  color: var(--player-muted);
  min-width: 2.8rem;
  text-align: center;
}

.reader-player-seek-wrap {
  position: relative;
  flex: 1;
  min-width: 7rem;
  height: 0.8rem;
  isolation: isolate;
}

.reader-player-progress-track {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  z-index: 1;
  height: 0.3rem;
  transform: translateY(-50%);
  border-radius: 999px;
  background: color-mix(in srgb, var(--player-fg) 24%, transparent);
  overflow: hidden;
  pointer-events: none;
}

.reader-player-progress-played {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--player-accent), #9fc0ff);
}

html[data-theme="light"] .reader-player-progress-played {
  background: linear-gradient(90deg, var(--player-accent), #60a5fa);
}

.reader-player-progress-knob {
  position: absolute;
  top: 50%;
  left: 0%;
  z-index: 3;
  width: 0.8rem;
  height: 0.8rem;
  margin-left: -0.4rem;
  border-radius: 50%;
  transform: translateY(-50%);
  background: var(--player-fg);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.28);
  pointer-events: none;
  will-change: left;
  backface-visibility: hidden;
  -webkit-font-smoothing: antialiased;
}

.reader-player-seek {
  width: 100%;
  accent-color: var(--player-accent);
}

/* One row with the gear buttons: label + slider, vertically centered together. */
.reader-player-volume-wrap {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  max-width: 100%;
  align-self: center;
}

.reader-player-volume-wrap .reader-player-label {
  margin: 0;
  line-height: 1;
  flex: 0 0 auto;
  white-space: nowrap;
}

.reader-player-volume {
  width: clamp(6.75rem, 26vw, 11rem);
  min-width: 5.5rem;
  max-width: 100%;
  height: 2rem;
  margin: 0;
  padding: 0;
  vertical-align: middle;
  accent-color: var(--player-accent);
}

.reader-volume-pending .reader-player-volume {
  visibility: hidden;
}

/* Seek uses a custom visual track layer; hide native track to avoid double bars. */
.reader-player-seek {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  line-height: 0;
  border: none;
  vertical-align: middle;
  opacity: 0;
  cursor: pointer;
}

.reader-player-seek::-webkit-slider-runnable-track {
  height: 0.3rem;
  background: transparent;
}

.reader-player-seek::-moz-range-track {
  height: 0.3rem;
  background: transparent;
  border: none;
}

.reader-player-seek::-moz-range-progress {
  height: 0.3rem;
  background: transparent;
  border: none;
}

.reader-player-seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 0;
  height: 0;
  margin-top: 0;
  box-sizing: content-box;
  border-radius: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.reader-player-seek::-moz-range-thumb {
  width: 0;
  height: 0;
  box-sizing: content-box;
  border-radius: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.reader-player-seek::-moz-focus-outer {
  border: 0;
}

.reader-player-btn {
  border: none;
  background: transparent;
  color: var(--player-fg);
  border-radius: 0;
  min-height: 2.1rem;
  min-width: 2.5rem;
  padding: 0 0.65rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.reader-player-btn--primary {
  width: 2.35rem;
  height: 2.35rem;
  min-width: 2.35rem;
  min-height: 2.35rem;
  padding: 0;
}

.reader-player-btn--utility {
  min-width: 2rem;
  min-height: 2rem;
  padding: 0;
}

.reader-player-btn--disabled {
  opacity: 0.35;
  pointer-events: none;
}

.reader-player:not([data-player-duration-ready="true"]) [data-player-text="duration"] {
  visibility: hidden;
}

.reader-player-icon {
  width: 1.15rem;
  height: 1.15rem;
  display: block;
  color: currentColor;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}

.reader-player-btn--primary .reader-player-icon {
  width: 1.35rem;
  height: 1.35rem;
}

.reader-player-btn--utility .reader-player-icon {
  width: 1.05rem;
  height: 1.05rem;
}

.reader-player-btn .icon-pause {
  display: none;
}

.reader-player-btn[data-playing="true"] .icon-play {
  display: none;
}

.reader-player-btn[data-playing="true"] .icon-pause {
  display: block;
}

.reader-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.reader-player-btn:focus-visible,
.reader-player-seek:focus-visible,
.reader-player-volume:focus-visible,
.reader-player-select:focus-visible,
.reader-player-speed-btn:focus-visible,
.reader-player-switch-input:focus-visible + .reader-player-switch-track {
  outline: 2px solid var(--player-accent);
  outline-offset: 2px;
}

.reader-player-btn:focus-visible {
  outline: none;
}

.reader-player-label {
  font-size: 0.75rem;
  color: var(--player-muted);
}

/* Right edge of the panel lines up with the gear (reader column’s right side); grows left above the controls. */
.reader-player-settings-panel {
  position: absolute;
  left: auto;
  right: 0;
  top: auto;
  bottom: calc(100% + 0.55rem);
  transform: none;
  width: min(17.5rem, calc(100vw - 1.5rem));
  display: grid;
  gap: 0;
  padding: 0.7rem 0.75rem;
  --reader-player-settings-divider: color-mix(in srgb, var(--player-fg) 12%, transparent);
  border-radius: 0.8rem;
  /* Nearly opaque — keeps a hint of depth without looking like frosted glass */
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--player-bg) 96%, #0a0d18 4%),
    color-mix(in srgb, var(--player-bg-strong) 98%, #05070f 2%)
  );
  border: 1px solid color-mix(in srgb, var(--player-fg) 20%, transparent);
  box-shadow: 0 12px 22px rgba(5, 8, 20, 0.38);
  z-index: 50;
  backdrop-filter: blur(8px) saturate(125%);
  -webkit-backdrop-filter: blur(8px) saturate(125%);
}

html[data-theme="light"] .reader-player-settings-panel {
  background: linear-gradient(to bottom, #ffffff, #f4f7fb);
  border: 1px solid color-mix(in srgb, var(--player-border) 88%, #e2e8f0);
  box-shadow:
    0 10px 20px rgba(15, 23, 42, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(6px) saturate(120%);
  -webkit-backdrop-filter: blur(6px) saturate(120%);
}

.reader-player-settings-panel[hidden] {
  display: none !important;
}

@media (max-width: 767px) {
  .reader-player-settings-panel {
    width: min(18rem, calc(100vw - 1.5rem));
    max-width: none;
  }
}

.reader-player-settings-title {
  margin: 0 0 0.55rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--reader-player-settings-divider);
  font-size: 0.78rem;
  color: var(--player-muted);
}

.reader-player-settings-panel > .reader-player-setting-row:not(:last-child) {
  padding-bottom: 0.55rem;
  margin-bottom: 0.55rem;
  border-bottom: 1px solid var(--reader-player-settings-divider);
}

.reader-player-setting-row {
  display: grid;
  gap: 0.35rem;
}

.reader-player-setting-row--switch {
  gap: 0;
}

.reader-player-switch-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 0;
  cursor: pointer;
  font-size: 0.8rem;
  line-height: 1.35;
  color: color-mix(in srgb, var(--player-fg) 92%, transparent);
}

.reader-player-switch-text {
  flex: 1;
  min-width: 0;
}

.reader-player-switch {
  position: relative;
  width: 2.75rem;
  height: 1.42rem;
  flex-shrink: 0;
}

.reader-player-switch-input {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.reader-player-switch-track {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--player-fg) 14%, transparent);
  background: color-mix(in srgb, var(--player-fg) 20%, transparent);
  pointer-events: none;
  transition: background 0.2s ease;
}

.reader-player-switch-input:checked + .reader-player-switch-track {
  background: color-mix(in srgb, var(--player-accent) 58%, var(--player-bg) 42%);
}

.reader-player-switch-thumb {
  position: absolute;
  top: 50%;
  left: 0.14rem;
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 50%;
  background: var(--player-fg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  transform: translateY(-50%);
  transition: transform 0.2s ease, background 0.2s ease;
}

.reader-player-switch-input:checked + .reader-player-switch-track .reader-player-switch-thumb {
  transform: translate(1.32rem, -50%);
  background: #f6f9ff;
}

.reader-player-setting-row--scroll-mode {
  gap: 0;
}

.reader-player-scroll-mode {
  margin: 0;
  padding: 0;
  border: none;
  min-width: 0;
}

.reader-player-scroll-mode__legend {
  padding: 0;
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: color-mix(in srgb, var(--player-fg) 88%, transparent);
}

.reader-player-scroll-mode__options {
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
}

.reader-player-scroll-mode__option {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.35;
  color: color-mix(in srgb, var(--player-fg) 92%, transparent);
  cursor: pointer;
}

.reader-player-scroll-mode__input {
  margin: 0.2rem 0 0;
  flex-shrink: 0;
  accent-color: var(--player-accent);
}

.reader-player-scroll-mode__hint {
  margin: 0.45rem 0 0;
  font-size: 0.68rem;
  line-height: 1.35;
  color: var(--player-muted);
}

.reader-player-select {
  border: 1px solid var(--player-border);
  background: color-mix(in srgb, var(--player-bg) 74%, #ffffff 7%);
  color: var(--player-fg);
  border-radius: 0.45rem;
  min-height: 2.1rem;
  padding: 0 0.4rem;
}

.reader-player-speed-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.reader-player-speed-btn {
  border: 1px solid color-mix(in srgb, var(--player-border) 82%, transparent);
  background: color-mix(in srgb, var(--player-bg) 78%, #ffffff 5%);
  color: var(--player-fg);
  border-radius: 999px;
  min-height: 1.75rem;
  padding: 0 0.45rem;
  font-size: 0.74rem;
  line-height: 1;
  cursor: pointer;
}

.reader-player-speed-btn:hover {
  background: color-mix(in srgb, var(--player-bg) 66%, #ffffff 10%);
}

.reader-player-speed-btn.is-active,
.reader-player-speed-btn[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--player-accent) 90%, #fff 10%);
  background: color-mix(in srgb, var(--player-accent) 32%, var(--player-bg) 68%);
  color: #f6f9ff;
}

html[data-theme="light"] .reader-player-speed-btn.is-active,
html[data-theme="light"] .reader-player-speed-btn[aria-pressed="true"] {
  border-color: color-mix(in srgb, var(--player-accent) 65%, #cbd5e1);
  background: color-mix(in srgb, var(--player-accent) 14%, #ffffff);
  color: #1e3a8a;
}

.reader-player audio {
  display: none;
}

.reader-audio-status {
  margin: 0;
  font-size: 0.8rem;
  color: var(--player-muted);
}

.reader-audio-error {
  color: #b00020;
}

/* Floating recenter button (keep-in-view mode only).
   Shown when the highlighted word is fully off-screen because the user has
   manually scrolled away. Click to autoscroll back to the active word. */
.reader-recenter-btn {
  position: fixed;
  right: 1.25rem;
  /* Sits over the top edge of the player dock (the dock's own bottom offset
     is 0.6rem + safe-area, so this overlaps the dock by ~1.1rem of the
     button's 2.85rem height). */
  bottom: calc(var(--reader-player-height, 8.25rem) - 0.5rem + env(safe-area-inset-bottom, 0px));
  z-index: 41;
  width: 2.85rem;
  height: 2.85rem;
  padding: 0;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--player-border) 80%, transparent);
  background: color-mix(in srgb, var(--player-bg-strong) 92%, var(--bg));
  color: var(--player-fg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow:
    0 8px 18px rgba(5, 8, 20, 0.35),
    0 2px 6px rgba(5, 8, 20, 0.2);
  backdrop-filter: blur(8px);
  transition:
    background-color 160ms ease,
    color 160ms ease,
    transform 160ms ease,
    border-color 160ms ease;
  animation: reader-recenter-fade-in 180ms ease;
}

.reader-recenter-btn[hidden] {
  display: none;
}

.reader-recenter-btn:hover {
  background: color-mix(in srgb, var(--player-bg-strong) 78%, var(--player-accent));
  color: #ffffff;
  border-color: color-mix(in srgb, var(--player-accent) 60%, transparent);
  transform: translateY(-1px);
}

.reader-recenter-btn:active {
  transform: translateY(0);
}

.reader-recenter-btn:focus-visible {
  outline: 2px solid var(--focus, var(--player-accent));
  outline-offset: 3px;
}

.reader-recenter-btn-icon {
  width: 1.4rem;
  height: 1.4rem;
  display: block;
}

html[data-theme="light"] .reader-recenter-btn {
  background: color-mix(in srgb, var(--player-bg-strong) 90%, #ffffff);
  color: var(--player-fg);
  border-color: color-mix(in srgb, var(--player-border) 90%, transparent);
  box-shadow:
    0 8px 16px rgba(15, 23, 42, 0.16),
    0 2px 6px rgba(15, 23, 42, 0.08);
}

html[data-theme="light"] .reader-recenter-btn:hover {
  background: var(--player-accent);
  color: #ffffff;
  border-color: var(--player-accent);
}

@keyframes reader-recenter-fade-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 768px) {
  .reader-recenter-btn {
    right: calc(var(--reader-rail-width) + 1.25rem);
  }
}

/* responsive */
@media (min-width: 768px) {
  .reader-app {
    --reader-player-height: 7.15rem;
  }

  /* Keep the fixed dock aligned with the center content column.
     Uses the same width vars as the reader grid, so sidebar changes
     automatically keep this in sync. */
  .reader-controls[data-reader-region="controls"] {
    left: calc(var(--reader-sidebar-width) + 0.75rem);
    right: calc(var(--reader-rail-width) + 0.75rem);
  }
}

@media (max-width: 767px) {
  .reader-player-volume-wrap {
    display: none;
  }

  .reader-player-row--timeline {
    flex-wrap: wrap;
  }

  .reader-player-group--center {
    order: 3;
    width: 100%;
  }

  .reader-player-group--right {
    order: 4;
    margin-left: auto;
  }

}