*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Ensure [hidden] always works even with CSS resets */
[hidden] { display: none !important; }

:root {
  --bg: #0f0f13;
  --surface: #1a1a24;
  --surface2: #22222f;
  --border: #2e2e42;
  --accent: #7c6af7;
  --accent-hover: #9585ff;
  --accent-glow: rgba(124, 106, 247, 0.25);
  --text: #e8e8f0;
  --text-muted: #7a7a9a;
  --highlight: #f7c948;
  --highlight-bg: rgba(247, 201, 72, 0.18);
  --danger: #f74f6a;
  --success: #4ff7a0;
  --radius: 12px;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 20px 12px;
}

@media (min-width: 600px) {
  body { padding: 32px 16px; }
}

.container {
  width: 100%;
  max-width: 760px;
  min-width: 0;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* ── Header ─────────────────────────────────── */
header {
  text-align: center;
  margin-bottom: 28px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 4px;
}

.header-logo {
  height: 24px;
  width: 24px;
}

header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin: 0;
}

.subtitle {
  color: var(--text-muted);
  margin-top: 6px;
  font-size: 0.9rem;
}

/* ── Input Tabs ──────────────────────────────── */
.input-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 10px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 4px;
}

.input-tab {
  flex: 1;
  padding: 8px 4px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.input-tab:hover { color: var(--text); }

.input-tab.active {
  background: var(--accent);
  color: #fff;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── URL panel ───────────────────────────────── */
.url-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
}

.url-row {
  display: flex;
  gap: 8px;
}

.url-input {
  flex: 1;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 0.88rem;
  outline: none;
  transition: border-color 0.2s;
}

.url-input:focus { border-color: var(--accent); }

.btn-url-fetch {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.btn-url-fetch:hover:not(:disabled) { background: var(--accent-hover); }
.btn-url-fetch:disabled { opacity: 0.5; cursor: not-allowed; }

.url-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.url-loading, .ocr-loading {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.url-loading-bar, .ocr-loading-bar {
  height: 3px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.url-loading-fill, .ocr-loading-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 99px;
  transition: width 0.3s ease;
}

.url-loading span, .ocr-loading span {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Camera panel ────────────────────────────── */
.camera-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px 16px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
}

.btn-camera {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 20px 40px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn-camera:hover { background: var(--accent-hover); }
.btn-camera:active { transform: scale(0.97); }

.camera-icon { font-size: 2rem; }

.camera-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.5;
}

/* ── Library panel ───────────────────────────── */
.library-panel {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.library-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.library-count {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.library-list {
  list-style: none;
  max-height: 260px;
  overflow-y: auto;
}

.library-empty {
  padding: 20px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.library-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.library-item:hover { background: var(--surface2); }
.library-item:last-child { border-bottom: none; }

.library-item-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.library-item-title {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
}

.library-item-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.library-item-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.btn-lib-load, .btn-lib-delete {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.8rem;
  transition: background 0.15s, color 0.15s;
}

.btn-lib-load:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-lib-delete:hover { background: rgba(247,79,106,0.1); color: var(--danger); border-color: var(--danger); }

.btn-save-inline {
  font-size: 0.72rem;
  opacity: 0.7;
}

/* ── Upload Zone ─────────────────────────────── */
.upload-zone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  min-height: 52px;
  display: flex;
  align-items: center;
}

.upload-zone:hover {
  border-color: var(--accent);
  background: rgba(124, 106, 247, 0.05);
}

.upload-zone.drag-over {
  border-color: var(--accent);
  border-style: solid;
  background: var(--accent-glow);
}

.upload-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  width: 100%;
}

.upload-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.upload-text {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.88rem;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.btn-link:hover {
  color: var(--accent-hover);
}

.upload-formats {
  font-size: 0.72rem;
  color: var(--text-muted);
  opacity: 0.6;
  margin-left: auto;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  font-size: 0.88rem;
}

.file-icon { font-size: 1rem; flex-shrink: 0; }

#fileName {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.btn-remove-file {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.85rem;
  transition: color 0.15s, background 0.15s;
  flex-shrink: 0;
}

.btn-remove-file:hover {
  color: var(--danger);
  background: rgba(247, 79, 106, 0.1);
}

/* ── Table Badge ─────────────────────────────── */
.table-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(124, 106, 247, 0.1);
  border: 1px solid rgba(124, 106, 247, 0.28);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ── Text Area ───────────────────────────────── */
.text-area-wrapper {
  position: relative;
}

.display-box {
  width: 100%;
  min-height: 200px;
  max-height: 400px;
  overflow-y: auto;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 44px 18px 18px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s;
  white-space: pre-wrap;
  word-break: break-word;
}

.display-box:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.display-box:empty::before {
  content: attr(data-placeholder);
  color: var(--text-muted);
  pointer-events: none;
}

.display-box .word.active {
  background: var(--highlight-bg);
  color: var(--highlight);
  font-weight: 600;
  border-radius: 3px;
}

.btn-clear {
  position: absolute;
  top: 10px;
  right: 10px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}

.btn-clear:hover {
  background: var(--surface2);
  color: var(--danger);
}

/* ── Controls ────────────────────────────────── */
.controls {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.controls-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 11px 22px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
}

.btn:active:not(:disabled) { transform: scale(0.97); }

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-play {
  background: var(--accent);
  color: #fff;
  flex: 1;
}

.btn-play:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-pause {
  background: var(--surface2);
  color: var(--text);
  border: 1.5px solid var(--border);
  flex: 1;
}

.btn-pause:hover:not(:disabled) { background: var(--border); }

.btn-stop {
  background: var(--surface2);
  color: var(--danger);
  border: 1.5px solid var(--border);
  flex: 1;
}

.btn-stop:hover:not(:disabled) {
  background: rgba(247, 79, 106, 0.1);
  border-color: var(--danger);
}

/* Mobile-first responsive tweaks */
@media (max-width: 600px) {
  .controls-row { gap: 6px; }
  .btn { padding: 10px 12px; font-size: 0.85rem; }
  .input-tab { font-size: 0.72rem; padding: 7px 2px; }
  header h1 { font-size: 1.6rem; }
  .subtitle  { font-size: 0.82rem; }
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-group label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
}

.setting-group label span {
  color: var(--accent);
  font-size: 0.78rem;
}

select {
  background: var(--surface2);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s;
  /* prevent select from overflowing its grid cell */
  width: 100%;
  min-width: 0;
  max-width: 100%;
}

select:focus { border-color: var(--accent); }

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  outline: none;
  cursor: pointer;
  margin-top: 4px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-glow);
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 99px;
  transition: width 0.3s linear;
}

/* ── Status ──────────────────────────────────── */
.status {
  margin-top: 10px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  min-height: 18px;
}

/* ── Footer (Nodeflow branding) ──────────────── */
.app-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 36px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-logo {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

.footer-brand {
  font-weight: 600;
  letter-spacing: 0.3px;
  color: var(--text);
}

/* ── Reading info bar ───────────────────────── */
.reading-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.info-sep { opacity: 0.4; }

/* ── Settings (collapsible) ─────────────────── */
.settings-details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 10px;
}

.settings-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  list-style: none;
  user-select: none;
  transition: background 0.15s;
}

.settings-toggle:hover { background: var(--surface2); }
.settings-toggle::-webkit-details-marker { display: none; }

.settings-details[open] .settings-toggle {
  border-bottom: 1px solid var(--border);
  color: var(--text);
}

/* Mobile-first: 1 col → 3 col on desktop */
.settings {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 12px;
  background: var(--surface);
  /* prevent any child from blowing out the grid */
  overflow: hidden;
}

@media (min-width: 600px) {
  .settings {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    padding: 16px;
  }
}

.settings .full-width { grid-column: 1 / -1; }

/* every grid cell can shrink to 0 */
.setting-group { min-width: 0; }

/* ── Engine selector ────────────────────────── */
.engine-selector {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.engine-option {
  min-width: 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.engine-option:has(input:checked) {
  border-color: var(--accent);
  background: rgba(124, 106, 247, 0.08);
}

.engine-option input { display: none; }

.engine-label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.engine-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.engine-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ── WakeLock toggle ────────────────────────── */
.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: nowrap;
}

.toggle-label span:last-child {
  flex: 1;
  line-height: 1.3;
}

.toggle-label input { display: none; }

.toggle-track {
  position: relative;
  width: 36px;
  height: 20px;
  background: var(--border);
  border-radius: 99px;
  flex-shrink: 0;
  transition: background 0.2s;
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}

.toggle-label input:checked + .toggle-track { background: var(--accent); }
.toggle-label input:checked + .toggle-track .toggle-thumb {
  transform: translateX(16px);
  background: #fff;
}

/* ── Kokoro loading bar ─────────────────────── */
.kokoro-loading {
  margin: 8px 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kokoro-loading-bar {
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.kokoro-loading-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  border-radius: 99px;
  transition: width 0.4s ease;
}

.kokoro-loading span {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* ── Pronunciation dictionary panel ─────────── */
.dict-panel {
  padding: 14px 16px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dict-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.dict-add-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.dict-input {
  flex: 1;
  min-width: 100px;
  background: var(--surface2);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}

.dict-input:focus { border-color: var(--accent); }

.dict-arrow {
  color: var(--text-muted);
  font-size: 1rem;
  flex-shrink: 0;
}

.btn-dict-add {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  width: 32px;
  height: 32px;
  font-size: 1.1rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
}

.btn-dict-add:hover { background: var(--accent-hover); }

.dict-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dict-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface2);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 0.82rem;
}

.dict-word { font-weight: 600; color: var(--text); }
.dict-arrow-sm { color: var(--text-muted); flex-shrink: 0; }
.dict-repl { color: var(--accent); flex: 1; }

.btn-dict-remove {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
  transition: color 0.15s, background 0.15s;
  margin-left: auto;
}

.btn-dict-remove:hover {
  color: var(--danger);
  background: rgba(247, 79, 106, 0.1);
}

/* ── Progress (moved inside controls) ───────── */
.progress-bar-wrapper {
  margin-top: 12px;
  height: 4px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
  opacity: 0;
  transition: opacity 0.3s;
}

.progress-bar-wrapper.active { opacity: 1; }

/* ── Scrollbar ───────────────────────────────── */
.display-box::-webkit-scrollbar { width: 5px; }
.display-box::-webkit-scrollbar-track { background: transparent; }
.display-box::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 99px;
}