:root {
  /* Theme tokens (light is default) */
  --bg: #f6f7fb;
  --bgDecor1: radial-gradient(1100px 700px at 10% 0%,
      rgba(10, 163, 127, 0.14),
      transparent 55%);
  --bgDecor2: radial-gradient(900px 650px at 90% 20%,
      rgba(216, 58, 58, 0.09),
      transparent 55%);

  --surface: rgba(255, 255, 255, 0.92);
  --surface2: rgba(255, 255, 255, 0.76);
  --panelTop: var(--surface);
  --panelBottom: rgba(255, 255, 255, 0.72);

  --text: rgba(15, 17, 22, 0.92);
  --muted: rgba(15, 17, 22, 0.68);
  --faint: rgba(15, 17, 22, 0.52);

  --border: rgba(15, 17, 22, 0.14);
  --divider: rgba(15, 17, 22, 0.08);

  --inputBg: rgba(255, 255, 255, 0.92);
  --inputBorder: rgba(15, 17, 22, 0.16);

  --playerBg: rgba(15, 17, 22, 0.04);

  --accent: #0aa37f;
  --accentBorder: rgba(10, 163, 127, 0.55);
  --accentBorderHover: rgba(10, 163, 127, 0.62);
  --accentBg: rgba(10, 163, 127, 0.14);
  --accentBgHover: rgba(10, 163, 127, 0.18);
  --focusRing: rgba(10, 163, 127, 0.18);

  --danger: #d83a3a;
  --warning: #8a5b00;
  --codeText: rgba(15, 17, 22, 0.78);

  --shadow: 0 18px 60px rgba(10, 12, 20, 0.14);

  /* Legacy aliases (kept to minimize selector churn) */
  --panel: var(--panelTop);
  --panel2: var(--panelBottom);
  --radius: 16px;
  --radiusSm: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
}

[data-theme="dark"] {
  --bg: #0b0c10;
  --bgDecor1: radial-gradient(1100px 700px at 10% 0%,
      rgba(124, 247, 212, 0.12),
      transparent 55%);
  --bgDecor2: radial-gradient(900px 650px at 90% 20%,
      rgba(255, 107, 107, 0.09),
      transparent 55%);

  --surface: rgba(255, 255, 255, 0.06);
  --surface2: rgba(255, 255, 255, 0.08);
  --panelTop: rgba(255, 255, 255, 0.06);
  --panelBottom: rgba(255, 255, 255, 0.04);

  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);
  --faint: rgba(255, 255, 255, 0.55);

  --border: rgba(255, 255, 255, 0.12);
  --divider: rgba(255, 255, 255, 0.08);

  --inputBg: rgba(0, 0, 0, 0.26);
  --inputBorder: rgba(255, 255, 255, 0.12);

  --playerBg: rgba(0, 0, 0, 0.25);

  --accent: #7cf7d4;
  --accentBorder: rgba(124, 247, 212, 0.55);
  --accentBorderHover: rgba(124, 247, 212, 0.62);
  --accentBg: rgba(124, 247, 212, 0.14);
  --accentBgHover: rgba(124, 247, 212, 0.18);
  --focusRing: rgba(124, 247, 212, 0.12);

  --danger: #ff6b6b;
  --warning: #ffcf5a;
  --codeText: rgba(255, 255, 255, 0.86);

  --shadow: 0 18px 60px rgba(0, 0, 0, 0.55);

  --panel: var(--panelTop);
  --panel2: var(--panelBottom);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bgDecor1), var(--bgDecor2), var(--bg);
}

code {
  font-family: var(--mono);
  font-size: 0.95em;
  color: var(--codeText);
}

.app {
  min-height: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 18px 16px 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 10px 8px;
}

.app {
  position: relative;
}

.chapterBanner {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: min(980px, calc(100% - 32px));
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  border-left-width: 6px;
  background: var(--surface);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 13px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.chapterBanner[hidden] {
  display: none;
}

.chapterBanner[data-kind="warning"] {
  border-left-color: #b87200;
  background: #fffbea;
  color: #3d2a00;
}

.chapterBanner[data-kind="error"] {
  border-left-color: #d83a3a;
  background: #fff1f0;
  color: #5a0f0f;
}

[data-theme="dark"] .chapterBanner[data-kind="warning"] {
  border-left-color: #d4943a;
  background: #201900;
  color: #f5dfa0;
}

[data-theme="dark"] .chapterBanner[data-kind="error"] {
  border-left-color: #e85555;
  background: #1c0b0b;
  color: #f5b0b0;
}

.chapterBanner__icon {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 900;
  flex: 0 0 auto;
  border: 1px solid var(--border);
  background: var(--surface2);
}

.chapterBanner[data-kind="warning"] .chapterBanner__icon {
  border-color: #b87200;
  color: #b87200;
}

.chapterBanner[data-kind="error"] .chapterBanner__icon {
  border-color: #d83a3a;
  color: #d83a3a;
}

[data-theme="dark"] .chapterBanner[data-kind="warning"] .chapterBanner__icon {
  border-color: #d4943a;
  color: #d4943a;
}

[data-theme="dark"] .chapterBanner[data-kind="error"] .chapterBanner__icon {
  border-color: #e85555;
  color: #e85555;
}

.chapterBanner__label {
  font-weight: 900;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  white-space: nowrap;
}

.chapterBanner__text {
  color: var(--text);
  flex: 1 1 auto;
}

.chapterBanner[data-kind="info"] {
  border-left-color: var(--accent, #3b6ced);
}

.chapterBanner__action {
  margin-left: auto;
  flex: 0 0 auto;
  cursor: pointer;
}

.btn.chapterBanner__action:hover {
  background: color-mix(in srgb, var(--accent) 30%, transparent);
  border-color: var(--accent);
}

#transcriptWaitBanner {
  flex-wrap: wrap;
  row-gap: 8px;
}

.transcriptProgress {
  flex: 1 1 100%;
  height: 4px;
  border-radius: 999px;
  background: var(--accentBorder);
  overflow: hidden;
}

.transcriptProgress[hidden] {
  display: none;
}

.transcriptProgress__fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.2s linear;
}

@media (prefers-reduced-motion: reduce) {
  .transcriptProgress__fill {
    transition: none;
  }
}

.chapterBanner__spinner {
  box-sizing: border-box;
  border: 3px solid var(--accentBorder);
  border-right-color: transparent;
  border-bottom-color: transparent;
  border-top-color: var(--accent);
  background: transparent;
  animation: chapterBanner-spin 0.75s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .chapterBanner__spinner {
    animation: chapterBanner-pulse 1.2s ease-in-out infinite;
  }

  @keyframes chapterBanner-pulse {
    50% {
      opacity: 0.35;
    }
  }
}

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

.langPicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.langPicker__label {
  font-weight: 700;
  font-size: 12px;
  letter-spacing: -0.01em;
  color: var(--muted);
}

.langPicker__select {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 10px;
  cursor: pointer;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: -0.01em;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.langPicker__select:hover {
  transform: translateY(-1px);
  border-color: var(--accentBorder);
}

.langPicker__select:active {
  transform: translateY(0px);
}

.langPicker__select:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focusRing);
}

.themeToggle {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: -0.01em;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.themeToggle:hover {
  transform: translateY(-1px);
  border-color: var(--accentBorder);
}

.themeToggle:active {
  transform: translateY(0px);
}

.themeToggle:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focusRing);
}

.brand__title {
  font-weight: 780;
  letter-spacing: -0.03em;
  font-size: 22px;
}

.brand__subtitle {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.main {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(480px, 1.2fr) minmax(300px, 0.7fr);
  grid-template-areas: "subtitles player chapters";
  gap: 14px;
  align-items: start;
}

.panel--player {
  grid-area: player;
}

.panel--subtitles {
  grid-area: subtitles;
}

.panel--chapters {
  grid-area: chapters;
}

.panel {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--panelTop), var(--panelBottom));
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--divider);
}

.panel__headerRight {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.panel__title {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.panel__meta,
.status {
  color: var(--muted);
  font-size: 12px;
}

.playerShell {
  padding: 12px 14px 0;
}

.playerControls {
  padding: 10px 14px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.playerControls[hidden] {
  display: none;
}

.playerControls__cluster {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.playerControls__cluster--seek {
  flex: 1 1 auto;
}

.playerControls__time {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 12.5px;
  padding: 0 4px;
  user-select: none;
  white-space: nowrap;
}

.playerControls__btn {
  padding: 9px 12px;
}

.playerShell__inner {
  border-radius: var(--radiusSm);
  border: 1px solid var(--border);
  background: var(--playerBg);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  position: relative;
}

.playerShell__mount {
  position: absolute;
  inset: 0;
}

.playerShell__mount iframe,
.playerShell__mount>div,
.playerShell__mount video {
  width: 100%;
  height: 100%;
}

.playerShell__mount audio {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  width: calc(100% - 24px);
  height: 44px;
}

.playerPlaceholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 14px;
  color: var(--faint);
  font-size: 13px;
  pointer-events: none;
}

.playerShell__inner:not(.isEmpty) .playerPlaceholder {
  display: none;
}

.dropOverlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 14px;
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 120ms ease;
}

.dropOverlay__content {
  border: 1px dashed var(--border);
  background: var(--surface2);
  color: var(--muted);
  border-radius: 14px;
  padding: 12px 14px;
  max-width: min(520px, 90%);
}

.playerShell__inner.isDragOver .dropOverlay {
  opacity: 1;
}

.playerShell__inner.isDragOver .playerPlaceholder {
  display: none;
}

.playerShell__inner.isDragOver {
  border-color: var(--accentBorderHover);
  box-shadow: 0 0 0 3px var(--focusRing);
}

.localFileRow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.localFileName {
  flex: 1 1 220px;
  min-width: 180px;
  border: 1px solid var(--border);
  background: var(--surface2);
  border-radius: 999px;
  padding: 9px 12px;
  color: var(--muted);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.localMedia {
  background: transparent;
}

.form {
  padding: 12px 14px 14px;
  display: grid;
  gap: 12px;
}

.field__label {
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 6px;
}

.field__labelRow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 6px;
}

.field__labelActions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.field__labelRow .field__label {
  margin: 0;
}

.field__labelAction {
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  border-radius: 999px;
  width: 28px;
  height: 28px;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  font-weight: 900;
  line-height: 1;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
  flex: 0 0 auto;
}

.field__labelAction:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: var(--accentBorder);
  background: var(--accentBgHover);
}

.field__labelAction:active:not(:disabled) {
  transform: translateY(0px);
}

.field__labelAction:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focusRing);
}

.field__labelAction:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.field__input,
.field__textarea {
  width: 100%;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--inputBorder);
  background: var(--inputBg);
  color: var(--text);
  outline: none;
}

.field__textarea {
  min-height: 140px;
  max-height: 60vh;
  resize: none;
  overflow-y: hidden;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.4;
}

.field__input:focus,
.field__textarea:focus {
  border-color: var(--accentBorderHover);
  box-shadow: 0 0 0 3px var(--focusRing);
}

.field__hint {
  margin-top: 7px;
  font-size: 12px;
  color: var(--faint);
}

.field__error {
  margin-top: 7px;
  font-size: 12px;
  color: var(--danger);
  min-height: 1.1em;
}

.field__warning {
  margin-top: 7px;
  font-size: 12px;
  color: var(--warning);
  font-weight: 650;
  min-height: 1.1em;
}

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

.btn {
  appearance: none;
  border: 1px solid var(--accentBorder);
  background: var(--accentBg);
  color: var(--text);
  border-radius: 999px;
  padding: 9px 14px;
  font-weight: 650;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  background: var(--accentBgHover);
  border-color: var(--accentBorderHover);
  cursor: pointer;
}

.btn:active {
  transform: translateY(0px);
}

.btn--secondary {
  border-color: var(--border);
  background: var(--surface2);
}

.chapters {
  padding: 10px;
  max-height: calc(100vh - 180px);
  overflow: auto;
}

.subtitles {
  padding: 10px;
  display: grid;
  gap: 10px;
}

.subtitlesFileRow {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.subtitlesFileName {
  flex: 1 1 220px;
  min-width: 180px;
  border: 1px solid var(--border);
  background: var(--surface2);
  border-radius: 999px;
  padding: 9px 12px;
  color: var(--muted);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.subtitlesSearchRow {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
}

.subtitlesSearchInput {
  font-family: var(--sans);
}

.subtitlesSearchNav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.subtitlesSearchPos {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--surface2);
  border-radius: 999px;
  padding: 6px 10px;
  line-height: 1;
}

.subtitlesSearchMeta {
  grid-column: 1 / -1;
  color: var(--muted);
  font-size: 12px;
}

.subtitlesList {
  display: grid;
  gap: 8px;
  max-height: calc(100vh - 320px);
  overflow: auto;
  padding-right: 2px;
}

.subtitlesCueRow {
  position: relative;
  border: 1px solid var(--border);
  background-color: var(--surface2);
  background-image: none;
  border-radius: 14px;
  padding: 10px 46px 10px 10px;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 10px;
  align-items: baseline;
}

.subtitlesCueActions {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  pointer-events: none;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: opacity 120ms ease;
}

.subtitlesCueRow:hover .subtitlesCueActions {
  opacity: 1;
  pointer-events: auto;
}

.subtitlesCueActionBtn {
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  border-radius: 999px;
  width: 30px;
  height: 30px;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  font-weight: 900;
  line-height: 1;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.subtitlesCueActionBtn:hover {
  transform: translateY(-1px);
  border-color: var(--accentBorder);
  background: var(--accentBgHover);
}

.subtitlesCueActionBtn:active {
  transform: translateY(0px);
}

.subtitlesCueActionBtn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focusRing);
}

.subtitlesCueTime,
.subtitlesCueText {
  margin: 0;
  font: inherit;
  color: inherit;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  text-align: inherit;
  border-radius: 8px;
}

.subtitlesCueTime {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 12.5px;
  white-space: nowrap;
}

.subtitlesCueText {
  font-size: 13px;
  line-height: 1.25;
  justify-self: stretch;
  min-width: 0;
}

.subtitlesCueTime:focus-visible,
.subtitlesCueText:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focusRing);
}

.subtitlesCueRow.isActiveCue {
  border-color: var(--accentBorderHover);
  background-color: var(--accentBg);
}

.subtitlesCueRow.isMatch {
  border-color: var(--accentBorder);
  background-image: linear-gradient(0deg, #1400ff2b, #1400ff2b);
}

.subtitlesCueRow.isActiveMatch {
  border-color: var(--accentBorderHover);
  background-image: linear-gradient(0deg, #1400ff2b, #1400ff2b);
  box-shadow: 0 0 0 3px var(--focusRing);
}

.subtitlesSearchHit {
  background: #1400ff2b;
  border-radius: 6px;
  padding: 0 2px;
}

.emptyState {
  padding: 14px 12px;
  border: 1px dashed var(--border);
  border-radius: 14px;
  color: var(--faint);
  font-size: 13px;
  text-align: center;
}

.chapterList {
  display: grid;
  gap: 8px;
}

.chapterRow {
  position: relative;
}

.chapterBtn {
  width: 100%;
  text-align: left;
  padding: 10px 10px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 10px;
  align-items: baseline;
}

.chapterTimeBtn,
.chapterTitleBtn {
  margin: 0;
  font: inherit;
  color: inherit;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  text-align: inherit;
  border-radius: 8px;
}

.chapterTitleBtn {
  text-align: left;
  justify-self: stretch;
  min-width: 0;
}

.chapterTimeBtn:focus-visible,
.chapterTitleBtn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focusRing);
}

.chapterBtn:hover {
  border-color: var(--accentBorder);
}

.chapterBtn[aria-current="true"] {
  border-color: var(--accentBorderHover);
  background: var(--accentBg);
}

.chapterActions {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0;
  pointer-events: none;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: opacity 120ms ease;
}

.chapterRow:hover .chapterActions {
  opacity: 1;
  pointer-events: auto;
}

.chapterActionBtn {
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 10px;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.chapterActionBtn:hover {
  transform: translateY(-1px);
  border-color: var(--accentBorder);
  background: var(--accentBgHover);
}

.chapterActionBtn:active {
  transform: translateY(0px);
}

.chapterActionBtn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focusRing);
}

.chapterTime {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 12.5px;
  white-space: nowrap;
}

.chapterTitle {
  color: var(--text);
  font-size: 13px;
  line-height: 1.25;
}

.footer {
  padding: 6px 10px;
}

.footer__note {
  color: var(--faint);
  font-size: 12px;
}

@media (max-width: 980px) {
  .main {
    grid-template-columns: 1fr;
    grid-template-areas:
      "player"
      "subtitles"
      "chapters";
  }

  .chapters {
    max-height: none;
  }

  .subtitlesList {
    max-height: none;
  }
}