/* ==========================================================================
   Metadata — MP3 ID3 tag editor
   base.css handles tokens, reset, body, Inter font, .chip, focus-visible,
   touch-action, .home-btn, .visually-hidden, reduced-motion
   ========================================================================== */

#page {
  max-width: 760px;
  margin: 0 auto;
  padding: calc(env(safe-area-inset-top, 0px) + 80px) var(--space-4) calc(env(safe-area-inset-bottom, 0px) + var(--space-5));
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.app-header {
  margin-bottom: var(--space-5);
}

.app-title {
  margin: 0 0 var(--space-1);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.app-sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* --------------------------------------------------------------------------
   Options bar (bitrate selector)
   -------------------------------------------------------------------------- */

.options-bar {
  margin-bottom: var(--space-3);
}

.bitrate-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--muted);
}

.bitrate-label > span {
  flex: 1;
}

.bitrate-select {
  flex: 0 0 auto;
  padding: 6px var(--space-2);
  background: rgba(0, 0, 0, 0.3);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}

.bitrate-select:hover { border-color: rgba(138, 124, 255, 0.4); }
.bitrate-select:focus { outline: none; border-color: var(--accent); }

/* --------------------------------------------------------------------------
   Drop zone (initial state)
   -------------------------------------------------------------------------- */

.drop-zone {
  display: block;
  width: 100%;
  padding: var(--space-7) var(--space-4);
  background: var(--surface);
  border: 2px dashed var(--line);
  border-radius: var(--radius-lg);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.15s ease;
}

.drop-zone:hover,
.drop-zone.is-hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.drop-zone.is-dragging {
  background: var(--accent-soft);
  border-color: var(--accent);
  transform: scale(1.01);
}

.drop-zone[hidden] { display: none; }

.drop-zone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  pointer-events: none;
}

.drop-icon {
  width: 56px;
  height: 56px;
  color: var(--accent);
}

.drop-headline {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.drop-sub {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--accent);
  text-decoration: underline;
  cursor: pointer;
  pointer-events: auto;
}

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

.drop-sub-emphasis {
  margin: var(--space-2) 0 0;
  font-size: 0.88rem;
  color: var(--text);
}

.drop-sub-emphasis strong {
  color: var(--accent);
  font-weight: 700;
}

.drop-warning {
  margin: var(--space-2) 0 0;
  padding: 6px var(--space-2);
  font-size: 0.78rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: var(--space-2);
}

.drop-warning strong {
  color: var(--text);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Warning view (shown before lossy conversion)
   -------------------------------------------------------------------------- */

.warn-view[hidden] { display: none; }

.warn-card {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid #e0a04c;
  border-radius: var(--radius-lg);
  text-align: center;
}

.warn-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-3);
  display: grid;
  place-items: center;
  background: #e0a04c;
  color: #0b0b12;
  border-radius: 999px;
  font-size: 1.8rem;
  font-weight: 800;
}

.warn-title {
  margin: 0 0 var(--space-2);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
}

.warn-body {
  margin: 0 0 var(--space-4);
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

.warn-body strong {
  color: var(--text);
}

.warn-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.warn-actions .btn-primary,
.warn-actions .btn-ghost {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Encoding progress view
   -------------------------------------------------------------------------- */

.encoding-view[hidden] { display: none; }

.encoding-card {
  padding: var(--space-6) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  text-align: center;
}

.encoding-headline {
  margin: 0 0 var(--space-4);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.progress-track {
  width: 100%;
  max-width: 400px;
  height: 12px;
  margin: 0 auto var(--space-3);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #b8a8ff);
  border-radius: 999px;
  transition: width 0.2s ease;
  box-shadow: 0 0 12px rgba(138, 124, 255, 0.5);
}

.encoding-sub {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   Edit view
   -------------------------------------------------------------------------- */

.edit-view[hidden] { display: none; }

/* Audio preview at top of edit view */
.audio-preview {
  margin-bottom: var(--space-4);
  padding: var(--space-2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.audio-preview audio {
  display: block;
  width: 100%;
  height: 36px;
  outline: none;
}

/* Dark-ish tint for Chrome's native controls */
.audio-preview audio::-webkit-media-controls-panel {
  background-color: rgba(255, 255, 255, 0.04);
}

.edit-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}

/* Cover art column */
.cover-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.cover-wrap {
  position: relative;
  width: 200px;
  height: 200px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cover-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 0.85rem;
}

.cover-placeholder svg {
  width: 48px;
  height: 48px;
}

.cover-placeholder[hidden] { display: none; }

.cover-actions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.cover-actions .btn-ghost {
  flex: 1;
  min-width: 0;
}

.cover-resize-row {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-1);
}

.cover-resize-row .btn-tiny {
  flex: 1;
  padding: 6px var(--space-2);
  font-size: 0.78rem;
  font-weight: 500;
}

.btn-tiny {
  padding: 6px var(--space-2);
  font-size: 0.78rem;
  border-radius: var(--radius-sm);
}

.cover-info {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-align: center;
}

/* Tag form */
.tag-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.field input[type="text"],
.field input[type="number"],
.field textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.field input:hover,
.field textarea:hover {
  border-color: rgba(138, 124, 255, 0.4);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 0, 0, 0.5);
  box-shadow: 0 0 0 3px rgba(138, 124, 255, 0.15);
}

.field textarea {
  resize: vertical;
  min-height: 60px;
  font-family: inherit;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.field-small input { font-size: 0.95rem; }

.field-full { grid-column: 1 / -1; }

/* --------------------------------------------------------------------------
   Pro metadata (collapsible)
   -------------------------------------------------------------------------- */

.pro-fields {
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0;
  overflow: hidden;
}

.pro-fields > summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  user-select: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.pro-fields > summary::-webkit-details-marker { display: none; }

.pro-fields > summary::before {
  content: '▸';
  display: inline-block;
  transition: transform 0.15s ease;
  color: var(--accent);
}

.pro-fields[open] > summary::before {
  transform: rotate(90deg);
}

.pro-fields > summary:hover {
  color: var(--text);
}

.pro-fields-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  padding: var(--space-3);
  padding-top: 0;
}

@media (max-width: 600px) {
  .pro-fields-grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   Rename row
   -------------------------------------------------------------------------- */

.rename-row {
  margin: var(--space-4) 0;
  padding: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.rename-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
}

.rename-toggle input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}

.rename-pattern {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.rename-pattern:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 0, 0, 0.5);
}

.rename-hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--muted);
}

.rename-hint code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 1px 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 3px;
  color: var(--text);
}

/* --------------------------------------------------------------------------
   Actions
   -------------------------------------------------------------------------- */

.actions-bar {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.btn-primary,
.btn-ghost {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  flex: 1;
  background: var(--accent);
  color: #0b0b12;
  border: 1px solid var(--accent);
  box-shadow: 0 0 18px rgba(138, 124, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(138, 124, 255, 0.5);
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  font-weight: 600;
}

.btn-ghost:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.btn-subtle {
  font-weight: 500;
  color: var(--muted);
}

.btn-subtle:hover {
  color: var(--text);
}

/* --------------------------------------------------------------------------
   File info + status
   -------------------------------------------------------------------------- */

.file-info {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}

.file-info-label {
  color: var(--muted);
  margin-right: var(--space-1);
}

#file-name {
  color: var(--text);
  font-family: var(--font-mono);
}

.file-info-size {
  margin-left: var(--space-2);
  font-family: var(--font-mono);
  color: var(--muted);
}

.status {
  margin: var(--space-3) 0 0;
  min-height: 1.4em;
  font-size: 0.9rem;
  color: var(--accent);
  text-align: center;
}

.status.is-error { color: #ff6b6b; }
.status.is-success { color: #6bff8a; }

/* --------------------------------------------------------------------------
   Batch / album mode
   -------------------------------------------------------------------------- */

.batch-view[hidden] { display: none; }

.batch-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.batch-sub {
  margin: var(--space-1) 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.batch-album {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-4);
  padding: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.batch-album-cover {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.batch-album-cover .cover-wrap {
  width: 160px;
  height: 160px;
}

.batch-album-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.batch-tracks {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 50vh;
  overflow-y: auto;
  padding-right: 4px;
  margin-bottom: var(--space-4);
}

.batch-row {
  display: grid;
  grid-template-columns: 24px 60px 1fr 1fr 80px;
  gap: var(--space-2);
  align-items: center;
  padding: var(--space-2);
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease, background 0.15s ease;
}

.batch-row:hover {
  border-color: rgba(138, 124, 255, 0.3);
}

.batch-row.is-excluded {
  opacity: 0.4;
}

.batch-row.is-error {
  border-color: #ff6b6b;
}

.batch-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}

.batch-row .row-track,
.batch-row .row-title,
.batch-row .row-artist,
.batch-row .row-format {
  padding: 6px var(--space-2);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
}

.batch-row .row-track {
  text-align: center;
  font-family: var(--font-mono);
}

.batch-row .row-format {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: rgba(0, 0, 0, 0.45);
  user-select: none;
}

.batch-row .row-format[data-fmt="mp3"]  { color: #b8a8ff; }
.batch-row .row-format[data-fmt="flac"] { color: #9bd45c; }
.batch-row .row-format[data-fmt="skip"] { color: #ff9b6b; }

.batch-row input:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(0, 0, 0, 0.45);
}

.batch-row .row-filename {
  grid-column: 2 / -1;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (max-width: 600px) {
  .batch-album {
    grid-template-columns: 1fr;
  }
  .batch-album-cover .cover-wrap {
    width: 100%;
    max-width: 220px;
    height: auto;
    aspect-ratio: 1;
    margin: 0 auto;
  }
  .batch-row {
    grid-template-columns: 24px 50px 1fr 60px;
  }
  .batch-row .row-artist {
    grid-column: 2 / -1;
  }
}

/* --------------------------------------------------------------------------
   Share card section
   -------------------------------------------------------------------------- */

.share-card-section {
  margin-top: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.share-card-section > summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-3) var(--space-4);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  user-select: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.share-card-section > summary::-webkit-details-marker { display: none; }

.share-card-section > summary::before {
  content: '▸';
  display: inline-block;
  transition: transform 0.15s ease;
  color: var(--accent);
}

.share-card-section[open] > summary::before {
  transform: rotate(90deg);
}

.share-card-section > summary:hover {
  background: var(--surface-hover);
}

.share-card-body {
  padding: 0 var(--space-4) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.format-tabs {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.format-tab {
  flex: 1;
  min-width: 0;
  padding: var(--space-2) var(--space-3);
  background: rgba(0, 0, 0, 0.3);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.format-tab:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
}

.format-tab.is-active {
  background: var(--accent);
  color: #0b0b12;
  border-color: var(--accent);
  box-shadow: 0 0 14px rgba(138, 124, 255, 0.4);
}

.share-preview-wrap {
  display: flex;
  justify-content: center;
  padding: var(--space-2);
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  min-height: 200px;
  align-items: center;
}

.share-preview {
  display: block;
  max-width: 100%;
  max-height: 540px;
  height: auto;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  image-rendering: auto;
}

.share-actions {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.share-actions .btn-ghost:last-child {
  flex: 1;
  font-weight: 700;
}

.share-hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--muted);
  text-align: center;
}

/* --------------------------------------------------------------------------
   Mobile
   -------------------------------------------------------------------------- */

@media (max-width: 600px) {
  #page { padding-top: calc(env(safe-area-inset-top, 0px) + 70px); }
  .app-title { font-size: 1.6rem; }
  .edit-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  .cover-wrap {
    width: 100%;
    max-width: 280px;
    height: auto;
    aspect-ratio: 1;
    margin: 0 auto;
  }
  .cover-actions {
    max-width: 280px;
    margin: 0 auto;
    width: 100%;
  }
  .actions-bar {
    flex-direction: column;
  }
  .btn-primary,
  .btn-ghost { width: 100%; }
}